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Eco-friendly waterborne coatings frequently exhibit poor corrosion resistance, high solvent content, and extended curing times, attributed to the excessive employment of hydrophilic groups and petroleum-derived polyols. In this work, aniline trimer (ACAT) and polyethylene glycol (PEG) were used as chain extenders. E-44 epoxy resin was subsequently utilized to modify the system and an aniline trimer-modified waterborne polyurethane (AT-WPU) dispersion was prepared and characterized. The chemical structure of the synthesized ACAT was characterized employing 1H NMR, ESI-MS, and FTIR spectroscopy. The structure and coating performance of the AT-WPU dispersion were investigated utilizing FTIR, particle size analysis, thermogravimetric analysis, DSC, TEM, SEM, and electrochemical corrosion testing. The results demonstrate that the aniline trimer-modified waterborne polyurethane dispersion was successfully synthesized. Additionally, the DSC analysis results and thermogravimetric graphs indicate that the glass transition temperature and thermal stability of the coatings increased with the addition of aniline trimer. As the aniline trimer content increased, the hardness and adhesion of the coatings were significantly enhanced. In the electrochemical corrosion assessment, the corrosion current density of AT-WPU-3 attained 7.245 × 10−9 A·cm−2, and the corrosion rate was as low as 0.08 μm·Y−1, indicating excellent corrosion resistance. The present study provides promising practical applications in the domain of metal material protection. [ABSTRACT FROM AUTHOR]

Conducting polymers like polyaniline (PANI) are promising pseudocapacitive electrode materials, yet experience instability in cycling performance. Since polymers often degrade into oligomers, short chain length anilines have been developed to improve the cycling stability of PANI‐based supercapacitors. However, the capacitance degradation mechanisms of aniline oligomer‐based materials have not been systematically investigated and are little understood. Herein, two composite electrodes based on aniline trimers (AT) and carbon nanotubes (CNTs) are studied as model systems and evaluated at both pre‐cycling and post‐cycling states through physicochemical and electrochemical characterizations. The favorable effect of covalent bonding between AT and CNTs is confirmed to enhance cycling stability by preventing the detachment of aniline trimer and preserving the electrode microstructure throughout the charge/discharge cycling process. In addition, higher porosity has a positive effect on electron/ion transfer and the adaptation to volumetric changes, resulting in higher conductivity and extended cycle life. This work provides insights into the mechanism of enhanced cycling stability of aniline oligomers, indicating design features for aniline oligomer electrode materials to improve their electrochemical performance. [ABSTRACT FROM AUTHOR]

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In the present workelectroactivepolyurethane coating was prepared via aringopening reactionof epoxy-terminated castor oil based polyurethane prepolymers with theappropriate amount of amine terminated aniline trimer oligomer (AT). Also, thenon-electroactivepolyurethane coating was prepared via replacing of AT via 1, 6 hexamethylene diamine (HDA) as acuring agent. The chemical structure of prepared coatingswas fully characterized by aconventional spectroscopic method and their physicochemical properties including chemical resistance, hardness and adhesion strength were alsoevaluated.The electroactivity behavior of the prepared coatings was confirmed by cyclic voltammetry technique. The corrosion protection properties of the both electroactive and non-electroactivecoatings on mild steel (MS) were measured by Tafel polarization technique and electrochemical impedance spectroscopy (EIS). According to the Tafelresult, aconsiderablereduction in corrosion current (Icorr) and amore positive shift in corrosion potential (Ecorr) were detected forelectroactive polyurethanecoated MSin comparison tothose bare and as well as non-electroactive polyurethane coated MS. Also, the EIS result indicated the higher pore resistance (Rp) valuesand consequently higher corrosion protection for electroactive coating in comparison to non-electroactive polyurethane coated MS. The higher chemical resistance, hardness, and adhesion strength were recorded for electroactive polyurethane coating. Based on recorded data, it was revealed that the prepared electroactive polyurethanecoatings not only could prevent the arrival of corrosion spices to the metal surface like a hydrophobicpolymer coatingbut alsocould enhance corrosion protection efficiency via redox reactions of their oligoaniline moieties with the metal surface.

Dextran with good biocompatibility and degradability shows great potentials for drug delivery and tissue engineering applications. Electro-responsive drug delivery system can provide on-demand and localized drug release. However, dextran-based conductive hydrogel with electrical stimuli responsiveness as drug delivery system has not been reported. Herein, we designed and fabricated a kind of biocompatible biodegradable conductive hydrogel system with the property of electro-responsiveness as a new smart drug delivery system for localized drug release. These series of hydrogels were synthesized by mixing dextran and electroactive aniline trimer with hexamethylene diisocyanate as crosslinker to form hydrogel network. These series of hydrogels exhibited stable rheological property and controllable swelling ratio. These hydrogels showed good conductivity and desirable electric stimuli ability to control drug release. Furthermore, this kind of hydrogel was controlled by external electrical stimuli to generate a kind of "on-off" precise drug release system. When extra voltage was applied, they released more drug intelligently and less drug molecule without external stimuli. The hydrogel showed good cytocompatibility and in vivo biocompatibility by using H&E staining and Toluidine blue staining. All together, these results indicated that these series of biocompatible conductive dextran-based hydrogels were promising candidates as smart drug delivery systems in future biomedical field. Unlabelled Image [ABSTRACT FROM AUTHOR]

Polyanilines are an important class of organic compounds, due to their utility in a large variety of applications. In contrast, oligo-anilines have been employed far more sporadically, in large part reflecting an absence of refined synthetic approaches. Herein, we report, for the first time, a relatively large-scale strategy to generate highly pure aniline trimers at different oxidation states with excellent yields (90–97%). [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • Electroactive elastomers were synthesized to mimic native heart tissue. • Electroactive films showed biocompatibility and enhanced proliferation of H9c2 cells. • The films promoted maturation and synchronized calcium transients of cardiomyocytes. • Micropatterned film greatly promoted cellular elongation, alignment of cardiomyocytes. Abstract Developing electroactive elastic scaffolds with micropatterned surface would be beneficial for cardiac therapy due to their capability of mimicking the anisotropy, electrical propagation, and mechanical property of native myocardium. In this study, we presented a series of micropatterned, electroactive, and degradable polymeric films with suitable mechanical property for cardiac tissue engineering. Specifically, we developed a kind of degradable bioelastomers based on poly(glycerol sebacate) (PGS) copolymerized with aniline trimer (AT) with micropatterned surface structure, electroactive property and modulus within the same order of magnitude of native heart tissue. All of these films with different AT contents (5 wt%, 10 wt%, and 15 wt%) showed a good cell viability and promoted the proliferation of rat cardiomyoblast-derived H9c2 cells. Especially, the electroactive film with the 10 wt% AT content was able to significantly enhance the cell-cell interaction, maturation and synchronous calcium transients of neonatal rat primary cardiomyocytes (CMs). Moreover, this electroactive elastomer was fabricated into micropatterned films, which showed the ability to guide CMs' alignment and elongation along with the aligned groove/ridge micropatterned surface and promote the amount of available intercellular Ca2+. These data suggest that this highly tunable micropatterned, electroactive, and biodegradable elastomer demonstrated the promising potential as an excellent scaffolding biomaterial for cardiac tissue repair and regeneration. [ABSTRACT FROM AUTHOR]

Abstract It is still a challenging task to make a colorimetric sensor which can respond to multiple responses at the same time. This task is even more difficult in aqueous solutions, as water molecules will significantly interfere the sensing process. Therefore, we have designed the low-cost, simple, efficient and selective dual responsive chemical sensor (DRCS) by capping the aniline trimer with benzoyl isothiocyanate. This sensor combines the advantages of naked eye detection of the CN¯ ion at different pH values. Moreover, DRCS can detect the pH of mixed solvent (DMSO/H 2 O) by the naked eye. The DRCS has shown high sensitivity to CN¯ ions. Meanwhile, it has no obvious response to other interfering anions, such as F¯, AcO¯, Br¯, HSO 4 ¯, SCN¯, PO 4 3¯, I¯, ClO 4 ¯, Cl¯, NO 3 ¯, PF 6 ¯, and BF 4 ¯. A minimum detection limit of 0.2 μM was achieved by DRCS for CN¯ ions. The feasibility of on-site detection of CN¯ was demonstrated using DRCS coated filter paper stripes. The present study reveals that the DRCS as low-cost material can be used as a potential sensor for the selective sensing of CN¯ ions and pH in the solutions. Graphical abstract Image 1 Highlights • Dual responsive chemical sensor (DRCS) was synthesized by capping aniline trimer with benzoyl isocyanate. • The sensor, DRCS was explored to detect the CN¯ anions and pH values by naked eye. • Detection of CN¯ by DRCS was also monitored by UV–vis, NMR, and colorimetric techniques. • Simple, rapid, and cost effective paper "test stripes" of DRCS can monitor the CN¯ in aqueous solution. • DRCS has an excellent sensitivity with the detection limit up to 0.2 μM. [ABSTRACT FROM AUTHOR]

Weaker intermolecular forces expand the isomerization alternatives for molecular aggregation, as observed for the prototype models of the aniline trimer (An3) and the monohydrated aniline dimer (An2‐W) when compared to the phenol trimer. In this experiment the aniline clusters were generated in a jet‐cooled expansion and probed using broadband (chirped‐pulsed) microwave spectroscopy. Three isomers of the aniline trimer and two isomers of the hydrated dimer were detected and characterized in the rotational spectrum. In the homotrimer the weak N−H⋅⋅⋅N hydrogen bonds are assisted by subtle combinations of N−H⋅⋅⋅π and C−H⋅⋅⋅π interactions, producing several competing low‐lying ring species in the gas phase. One of the aniline trimers is a symmetric top, topologically equivalent to the only observed phenol trimer. Conversely, addition of a water molecule to the aniline dimer introduces a leading O−H⋅⋅⋅N interaction, making water to behave as dominant hydrogen‐bond pivot between the two aniline molecules. This combination of weak intermolecular interactions critically tests the performance of dispersion‐corrected or parametrized density‐functional methods. Evaluation of the B3LYP‐D3(BJ) and M06‐2X methods revealed deficiencies of the Truhlar functional to reproduce the experimental rotational data. Weaker hydrogen bonds favour competing isomerism in neutral molecular clusters, as observed in five isomers of the aniline trimer and the hydrated aniline dimer. [ABSTRACT FROM AUTHOR]

Novel super-hydrophobic aniline trimer-containing siliceous coatings were carefully acquired through electrodeposition in a mixed solution of tetraethoxysilane and triethoxysilylpropyl isocyanate modified aniline trimer (M-AT). Chemical constitution, morphology, hydrophobicity and anticorrosion ability of as-prepared hybrid coatings were investigated by corresponding equipment. Compared to pure silica coating, the AT-containing silica coatings presented excellent super-hydrophobicity and enhanced anticorrosion performance. The impedance was the highest and the corrosion current density was the lowest for modified silica coating with proper M-AT (5 wt%). The super-hydrophobic of AT-containing silica coating was conductive to avoid the direct contact between corrosion medium and metal substrate. The peculiar oxidation-reduction feature of AT was help to promote the generation of passivation films (ferric oxide and ferroferric oxide). The combined action of above-mentioned two functions facilitated the perfection of corrosion performance for AT-containing silica coating. [ABSTRACT FROM AUTHOR]

This paper provided a novel coating system for Q235 steel using electrodeposited oligoaniline modified silica coating (E-M-SiO 2 ) as a pre-process coating, which was prepared by one step coelectrodeposition of a mixture of tetraethyl orthosilicate (TEOS) and N,N′-Bis(4′-(3-triethoxysilylpropylureido)-phenyl)-1,4-quinonenediimine (TSUPQD). Microstructure, contact angle, electroactivity and anticorrosion performance were investigated by FTIR, UV–vis, AFM, SEM, OCA20 contact angle analyzer, CV and CHI-660E electrochemical workstation. The CA test indicated, in comparison with pure silica and sol–gel modified silica hybrid coatings, the electrodeposited modified silica coating exhibited a super hydrophobic performance. The CV test illustrated that the special redox property of aniline trimer was maintained in these modified silica hybrid coatings. More importantly, the anticorrosion effectiveness for Q235 steel in 3.5% NaCl solution was improved by the addition of oligoaniline modified silica as the pre-process coating. By comparison, it turned out that the epoxy/E-M-SiO 2 coating system presented the lowest i corr value and the highest |Z| 0.01Hz value. The corrosion protection mechanism was the synergistic effect of super hydrophobic nature of E-M-SiO 2 pre-process coating and special catalytic capability of aniline trimer unit, which effectively restrained the permeation of corrosion medium and induced the formation of passive films consisted of α-Fe 2 O 3 and Fe 3 O 4 on the Q235 surface. [ABSTRACT FROM AUTHOR]

Novel electroactive sol-gel hybrid coatings were synthesized by hydrolysis and condensation reaction of tetraethoxysilane (TEOS) and different mass ratios of silane-capped aniline trimer (TSUPQD) on the surface of Q235 steel. Microstructure, thermal stability, and corrosion resistance of as-prepared hybrid coatings were characterized by FTIR, UV-Vis, SEM, TGA, CA measurement, polarization curve, and electrochemical impedance spectroscopy. It could be seen that the icorr value of as-prepared novel coating was markedly lower than those of pure TEOS-based coating and bare substrate. EIS results indicated that the impedance of hybrid coating was higher than that of Q235 steel substrate, indicating the effective protective property for substrate. Meanwhile, the aniline trimer-based hybrid coatings presented much higher impedance after immersion in 3.5 wt% NaCl for 200 h, and the best corrosion performance was acquired when the mass ratio of TEOS/TSUPQD is 100:4. The XRD and SEM analysis of the corrosion product beneath the hybrid coatings showed that the redox catalytic capability of aniline trimer could induce the Q235 substrate to form the passive films which mainly consisted of Fe2O3 and Fe3O4. Novel electroactive sol-gel hybrid coatings is successfully achieve in this paper.Corrosion property of aniline trimer containing hybrid coatings is obvious improved.The corrosion property is best when the mass ratio of TESO/TSUPQD is 100:4.The corrosion products mainly contain α-Fe2O3, α-Fe2(OH)3Cl and Fe3O4. [ABSTRACT FROM AUTHOR]

Graphene oxide (GO) has attracted much attention in anticorrosive coating applications due to its excellent mechanical properties, thermochemical stability and large specific surface area. In this paper, aniline trimer modified GO composites (ATGO) were prepared through modifying GO at different temperatures of 65 °C, 80 °C, 95 °C, and 110 °C, respectively. Aniline trimer modified GO composite coatings (ATGO/EP) were then prepared by adding different quantities of ATGO to epoxy coating, with the mass fractions of 0.05%, 0.1% and 0.3%, respectively. The resulting composite coatings were then sprayed onto Q235 steel plates for characterization and anticorrosion testing. A series of characterization methods such as x-ray diffraction (XRD), Raman spectra, Fourier transform infrared spectroscopy (FT-IR), Atomic force microscopy (AFM) and Transmission electron microscopy (TEM) were used to prove that aniline trimer was successfully grafted on GO. The optimal reaction temperature for ATGO preparation was determined to be 95 °C. Using anticorrosive tests such as Electrochemical impedance spectroscopy (EIS), salt spray test and adhesion test, it was proven that the addition of ATGO can significantly promote anticorrosion performance of epoxy resin (E-44). The optimal addition amount of ATGO to prepare composite coatings was determined to be 0.05 wt%. Its coating resistance after soaking in 3.5% NaCl solution for 10 days was 6.87 × 10 ^6 Ω, which was two orders of magnitude higher than the 3.89 × 10 ^4 Ω of pure epoxy coating. The importance and originality of this study is that it explores an effective way to improve the anticorrosion performance of epoxy coatings.

Novel electroactive silica-based hybrid coatings were synthesized on the surface of Q235 low carbon steel via one-step electrodeposition and were analyzed by FTIR, UV-vis, SEM, OCA20 contact angle (CA) analyzer and CHI-660E electrochemical workstation, respectively. The CA test indicated, in comparison with bare Q235 substrate, the silica hybrid material modified by N, N'-Bis(4′-(3-triethoxysilylpropylureido)-phenyl)-1,4- quinonenediimine (TSUPQD) exhibited an excellent hydrophobic properties. More importantly, the deposition potential significantly affected the corrosion resistance of TSUPQD modified silica hybrid material. By comparing with various deposition potentials (−1.1, −1.3, −1.5, −1.7 V) under the deposition time of 500 s, the coating prepared under the potential of −1.5 V presented the best anti-corrosion performance for Q235 steel in 3.5 wt.% NaCl solution. The XRD and SEM analysis of corrosion product beneath the hybrid coatings showed that the redox catalytic capability of aniline trimer unit induced the Q235 substrate to form the passive films which mainly consisted of α-Fe 2 O 3 and Fe 3 O 4 . [ABSTRACT FROM AUTHOR]

An aniline trimer derivative possessing multiple furan groups (TFAT) is prepared and used as a building unit for preparation of self-healing anticorrosion coatings. The aniline trimer unit brings electrochemical activity to TFAT, and the tertiary amine and glycidylether groups provide TFAT excellent adhesive ability. Both features contribute to the high performance of anticorrosion property of crosslinked TFAT coatings on cold-rolled steel (CRS). An ultralow corrosion rate of 0.12 μm y −1 and a high impedance at low frequency (Z 0 ) of 9.2 × 10 5 Ω cm −2 have been recorded with the coatings, both demonstrate hundreds times enhancements of the anticorrosion properties compared to the CRS samples coated with crosslinked aniline trimer (corrosion rate: 71 μm y −1 ; Z 0 : 1240 Ω cm −2 ). Moreover, as possessing furan groups, TFAT is a suitable agent to react with multifunctional maleimide compounds for formation of thermally-reversible crosslinked networks through Diels-Alder reaction. Consequently, TFAT-based self-healing anticorrosion coatings are obtained. In a cycle test, the TFAT-based reversible crosslinked coating demonstrates a high self-healing efficiency of anticorrosion with a recovery of protection efficiency from 79.8% to 99.2%, corresponding to a 99.3% of protection efficiency based recovery. A new material showing high anticorrosion and self-healing efficiency for self-healing anticorrosion coatings has been demonstrated. [ABSTRACT FROM AUTHOR]

Long cycle life and high energy/power density are imperative to energy storage systems. Polyaniline (PANI) has shown great potential as an electrode material but is limited by poor cycling and rate performance. We present a molecular design approach of binding short-chain aniline trimers (ATs) and carbon nanotubes (CNTs) through the formation of amide covalent linkages enabled by a simple laser scribing technique. The covalently coupled AT/CNT (cc-AT/CNT) composite retains 80% of its original capacitance after 20 000 charge/discharge cycles, which readily outperforms long-chain PANI/CNT composites without covalent connections. The compact AT/CNT heterointerfaces produce fast charge/discharge kinetics and excellent rate capability. The flexible symmetric quasi-solid-state devices can be stably cycled beyond 50 000 cycles, at least 5 times longer than most PANI/CNT-based symmetric supercapacitors reported to date. This molecular design of durable conducting polymer-based electrode materials enabled by laser irradiation presents a feasible approach toward robust advanced energy storage devices.

In this work, bio-based air-drying water-borne polyurea dispersions (Bio-PUDs) containing alkyd intermediate as polyol and aniline trimer (AT) as chain extender were synthesized, characterized, and applied as an anticorrosion coating. Firstly, the structure and physical characteristics of bio-based air-drying water-borne polyurea dispersions with aniline trimer as a chain extender were studied using Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and rheological testing. The coating properties and anticorrosive performance of bio-based air-drying water-borne polyurea coatings were also investigated. The results indicated that the bio-based water-borne polyurea containing aniline trimer as a chain extender was synthesized successfully. Meanwhile, the glass transition temperature and the tensile strength of bio-based air-drying aqueous polyurea dispersions increased with the addition of alkyd intermediate and aniline trimer. In addition, the coating performance showed that the air-drying polyurea coating had a shorter tack-free time and higher coating hardness with the addition of alkyd intermediate and aniline trimer. Furthermore, compared with Bio-PUDs-0 (without alkyd intermediate and AT), Bio-PUDs-1 (chain extenders without AT), and Bio-PUDs-3 (chain extenders with 10 % AT), Bio-PUDs-2 (chain extenders with 5 % AT) displayed low viscosity, balanced coating properties and excellent anticorrosive performance. Therefore, alkyd intermediate and aniline trimer can be applied to improve the coating properties and corrosion resistance of bio-based air-drying aqueous polyurea coatings. • The water-borne Bio-PUDs containing AK as polyol and AT as chain extender were synthesized successfully. • The coating properties and anticorrosive performance of polyurea coatings can be effectively improved by the use of AK. • As a chain extender, AT can be used to improve the anticorrosive performance and coating properties of polyurea coatings. [ABSTRACT FROM AUTHOR]

In this work, UV-cured electroactive polyurethane acrylate (EPU) materials with the superhydrophobic surface structure of biomimetic peacock feather were firstly prepared and applied in anticorrosive coatings. Firstly, amine-capped aniline trimer (ACAT) and vinyl-capped aniline trimer (VCAT) were synthesised and characterised by 1H-nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared spectroscopy (FTIR) and mass spectroscopy. Polyurethane acrylate (PUA) was synthesised and characterised by 1H NMR and FTIR spectroscopy. EPU was then prepared through the UV curing of PUA with 0, 1, 3 and 5 wt% VCAT (named EPU0, EPU1, EPU3 and EPU5, respectively) and characterised via FTIR. The redox capabilities of the as-prepared EPU series were investigated by cyclic voltammetry studies. EPU with higher VCAT loading (EPU5) exhibited better corrosion protection performance than those with lower VCAT loadings (EPU0, EPU1 and EPU3) based on a series of electrochemical corrosion measurements because of the formation of a dense metal oxide layer as evidenced by Raman spectroscopy. Moreover, EPU5 with the surface structure of biomimetic peacock feather (denoted by BEPU5) was prepared by nanocasting technique with polydimethylsiloxane as the flexible transparent negative template. The surface morphology and wettability of BEPU5 was investigated by scanning electron microscopy and contact angle (CA) analysis. The CA of BEPU5 remarkably increased to 145° compared with that of EPU5 63°. This massive increase in CA indicates efficient superhydrophobic properties, which were induced by the biomimetic peacock feather and produced outstanding corrosion protection performance for short and long terms based on a series of electrochemical corrosion measurements. This study is the first of its type to produce a biomimetic feather with massive increase in superhydrophobic properties, which is expected to revolutionise biomimetic industrial coating technologies towards better corrosion protective coatings. [Display omitted] • UV-cured EPU with superhydrophobic biomimetic peacock feather were firstly prepared and applied in anticorrosive coatings. • EPU with higher VCAT loading (EPU5) exhibited better corrosion protection performance than those with lower VCAT loadings. • Biomimetic peacock feather of EPUs (BEPUs) prepared by nanocasting PDMS induced massive increase in contact angle. • BEPU5 showed outstanding electrochemical corrosion protection performance for short and long terms. [ABSTRACT FROM AUTHOR]

Abstract: The electroactive polyimide consisting of various content of amine-capped aniline trimers (ATs) have been successfully synthesized and characterized by Fourier-Transformation infrared and UV–visible absorption spectroscopy. The electroactivity of as-prepared polyimides was tested by electrochemical cyclic voltammetry (CV) studies. It was noticed that the as-prepared electroactive polyimide with higher content of amine-capped ATs shows higher electroactivity (i.e., larger redox current) than that of non-electroactive polyimide, leading to enhance corrosion protection efficiency on cold-rolled steel (CRS) electrodes. This enhanced corrosion protection efficiency has been explained based on a series of electrochemical measurements such as corrosion potential, polarization resistance, corrosion current and electrochemical impedance spectroscopy (EIS) studies in 5 wt-% NaCl electrolyte. This significant enhancement of corrosion protection on CRS electrodes as compared to non-electroactive polyimide might probably be attributed to the redox catalytic property of as-prepared electroactive polyimide coatings inducing the formation of passive layer of metal oxide. [Copyright &y& Elsevier]

Electrically conductive polymeric materials are known as a special class of intelligent bioactive materials capable of regulating cellular behaviors of human adipose-derived mesenchymal stem cells, especially their differentiation to bone tissue. Here the synthesis of electroactive self-healing polyurethane scaffolds (PUAT) with shape memory ability based on aniline trimer and disulfide bonds are reported. The prepared scaffolds were characterized by FTIR, tensile test, water contact angle, electrical conductivity, and degradation test. The PUAT5 scaffold (containing 5% aniline trimer) exhibited excellent self-healing (>95%) and shape memory properties with shape recovery ratio (>95%, ~30 s at 40 °C) and shape fixity ratio (>96%) at a temperature close to the physiological temperature. The PUAT5 significantly promote the human adipose-derived mesenchymal stem cell adhesion and proliferation compared to PUAT0 and TCP. Also, the gene expression level of RUNX2, COL1, ALP, and OCN of PUAT5 were significantly enhanced after 21 days, in line with the increased maturity of extracellular matrix and mineralization. Furthermore, almost 75% of the bone volume has been recovered at 8 weeks post-surgery while the control group showed 26% recovery. The In vitro and In Vivo results suggested that these multifunctional engineered constructs have great potential in repairing various bone defects. [Display omitted] • The composite scaffold shows outstanding shape memory properties. • The AT-contained scaffolds indicated excellent self-healing capability at low temperature. • PUAT scaffolds could well support hASC cells to attach, grow and proliferate. • The introduction of aniline trimer significantly improved osteogenesis In vitro and In vivo. [ABSTRACT FROM AUTHOR]

• Electroactive elastomers showed excellent mechanical and shape memory properties. • Electroactive polyurethane films showed good biocompatibility and anti-oxidant capacity. • Electroactive polyurethane greatly enhanced proliferation of L929 cells. • Electroactive polyurethane dressings significantly promoted the in vivo wound healing. Development of wound dressings that not only have multiple advantages including good barrier properties, elasticity and shape memory properties, but also show anti-infection, anti-oxidative and promote cell adhesion, proliferation to enhance wound healing process, remains an ongoing challenge in the skin tissue engineering. Herein, we designed and synthesized a series of electroactive shape memory polyurethane-urea elastomers by combining the mechanical properties of polycaprolactone (PCL) segments, wettability of polyethylene glycol (PEG) segments and electroactivity of aniline trimer (AT) segments, as antibacterial, anti-oxidant and electroactive film dressing for cutaneous wound healing. The films displayed suitable hydrophilicity and swelling ratio, excellent mechanical and shape memory properties, electroactivity, free radical scavenging capacity, non-adherent property and biocompatibility. Excitingly, the electroactive film with an optimal concentration of 12 wt% AT promoted mouse fibroblasts (L929) adhesion and proliferation, and it also significantly accelerated in vivo wound healing process than no-electroactive film and commercial dressing (Tegaderm™ film) through promoting granulation tissue thickness and collagen deposition in a full-thickness skin defect model. Moreover, after loading with vancomycin as antibacterial agents, the rate of wound healing is further enhanced. In summary, the electroactive shape memory polyurethane-urea films significantly promoted in vivo wound healing process attributed to its multifunctional properties indicated that they are excellent candidates as film wound dressing. [ABSTRACT FROM AUTHOR]