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In this work, silver nanoparticles (AgNPs) were produced by soil isolated fungus Eurotium cristatum extract and thin-film nanocomposite (Ag/PSf/PA) membrane was built-up (by adding different concentrations of AgNPs into the polysulfone support layer) to look into the impacts of nanomaterial composition (i.e., sizes, structure, and shapes) on membrane possessions and desalination operations. The desalination consequences exposed that the merging of AgNPs produced membrane of enhanced filtration performances (Ag/PSf/PA) than pure thin film composite membrane (PSf/PA). In contrast to the PSf/PA membrane, the Ag/PSf/PA membrane possesses better water flux (32 vs. 16.5 L/m² h) and advanced NaCl rejection (91.7% vs. 89%). Moreover, scanning electron microscopy analysis outcomes reveal that the enlargement of gram-negative (Escherichia coli) and gram-positive (Listeria sp.) were greatly inhibited on the Ag/PSf/PA nanocomposite membrane, representing the sure thing of silver nanoparticles. This analysis offers enormous potential for promising use as a new form of anti-biofouling membrane. [ABSTRACT FROM AUTHOR]

Nano-composite bistratal antiscale coating for large chemical equipment was preparaed with epoxy modified organosilicone resin as base course material, with nano SiO2-epoxy modified organosilicone resin composite coating as surface course material. Through analyzing the ingredient ratio of each layer, and testing integrated performance of single-deck coating and double-deck coating by experiment, the results showed that hydrophobic of the bistratal composite coating could reach the best status (contact angle was 153.69°) with base course coating solvent content at 40 wt%, surface course coating resin content at 40 wt%, and namameter SiO2 content at 9.1 wt%. As single-deck coating, double-deck coating had good resistance to chemical corrosion, ideal hardness (3H) and could be solidified at 150 °C. Besides, the metal adhesion and anti-adhesion property were superior to nano-composite single-deck coating. It could reach the use standard of large chemical equipment. [ABSTRACT FROM AUTHOR]

Abstract: The current paper reports the synthesis of a highly hydrophilic, antifouling dendronized poly(3,4,5-tris(2-(2-(2-hydroxylethoxy)ethoxy)ethoxy)benzyl methacrylate) (PolyPEG) brush using surface initiated atom transfer radical polymerization (SI-ATRP) on PDMS substrates. The PDMS substrates were first oxidized in H2SO4/H2O2 solution to transform the Si–CH3 groups on their surfaces into Si–OH groups. Subsequently, a surface initiator for ATRP was immobilized onto the PDMS surface, and PolyPEG was finally grafted onto the PDMS surface via copper-mediated ATRP. Various characterization techniques, including contact angle measurements, attenuated total reflection infrared spectroscopy, and X-ray photoelectron spectroscopy, were used to ascertain the successful grafting of the PolyPEG brush onto the PDMS surface. Furthermore, the wettability and stability of the PDMS–PolyPEG surface were examined by contact angle measurements. Anti-adhesion properties were investigated via protein adsorption, as well as bacterial and cell adhesion studies. The results suggest that the PDMS–PolyPEG surface exhibited durable wettability and stability, as well as significantly anti-adhesion properties, compared with native PDMS surfaces. Additionally, our results present possible uses for the PDMS–PolyPEG surface as adhesion barriers and anti-fouling or functional surfaces in biomedical applications. [Copyright &y& Elsevier]