Back to Search
Start Over
Effect of Graphene Oxide-Modified CaAl-Layered Double Hydroxides on the Carbon Dioxide Permeation Properties of Fluoroelastomers.
- Source :
- Polymers (20734360); Oct2023, Vol. 15 Issue 20, p4151, 20p
- Publication Year :
- 2023
-
Abstract
- This work aimed to investigate the CO<subscript>2</subscript> gas barrier and mechanical properties of fluorine rubber nanocomposites filled with Ca/Al layered hydroxide (graphene oxide [GO]/LDH-Ca<subscript>2</subscript>Al) modified by GO. GO/LDH-Ca<subscript>2</subscript>Al nanocomposite fillers were prepared by depositing Ca/Al layered hydroxide (LDH-Ca<subscript>2</subscript>Al) into the surface of alkalized GO (Al-GO). The prepared GO/LDH-Ca<subscript>2</subscript>Al nanocomposite fillers and complexes were characterized by Fourier infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) for structural and micromorphological characterization. The results showed that GO/LDH-Ca<subscript>2</subscript>Al was successfully prepared with strong interactions between Al-GO and LDH, and the compatibility of GO/LDH-Ca<subscript>2</subscript>Al nanocomposite fillers with the polymer was significantly improved compared with that of LDH-Ca<subscript>2</subscript>Al. Consequently, both the fracture strength (σ<subscript>b</subscript>) and strain (ε<subscript>b</subscript>) of GO/LDH-Ca<subscript>2</subscript>Al nanocomplexes remarkably increased, and they exhibited excellent mechanical properties. Differential scanning calorimetry and thermogravimetric analysis were used to characterize the thermal stability of GO/LDH-Ca<subscript>2</subscript>Al nanocomposite fillers, and GO/LDH-Ca<subscript>2</subscript>Al nanocomposite fillers have better thermal stability than LDH-Ca<subscript>2</subscript>Al. The reaction products (S-LDH-Ca<subscript>2</subscript>Al and S-GO-Ca<subscript>2</subscript>Al) of LDH-Ca<subscript>2</subscript>Al and GO/LDH-Ca<subscript>2</subscript>Al with CO<subscript>2</subscript> were characterized using XRD and TGA, respectively, and the results show that LDH-Ca<subscript>2</subscript>Al reacts readily and chemically with CO<subscript>2</subscript>, resulting in a lower diffusion coefficient of CO<subscript>2</subscript> in the LDH-Ca<subscript>2</subscript>Al nanocomplexes than that of the GO/LDH-Ca<subscript>2</subscript>Al nanocomplexes and leading to the destruction of the laminar structure of LDH-Ca<subscript>2</subscript>Al, while GO/LDH-Ca<subscript>2</subscript>Al has better CO<subscript>2</subscript> resistance stability. GO/LDH-Ca<subscript>2</subscript>Al nanocomplexes exhibited a reduced content of hydroxyl groups with pro-CO<subscript>2</subscript> nature exposed on the surface of LDH-Ca<subscript>2</subscript>Al, improving the interfacial interaction between the nanofillers and the rubber matrix and enhancing the dispersion of GO/LDH-Ca<subscript>2</subscript>Al in the polymers. Moreover, CO<subscript>2</subscript> in the soluble GO/LDH-Ca<subscript>2</subscript>Al nanocomposites was significantly reduced, while the diffusion properties demonstrated weak temperature dependence on solubility. The mechanism of the CO<subscript>2</subscript> gas barrier of polymers filled with GO/LDH-Ca<subscript>2</subscript>Al was proposed on the basis of the Arrhenius equation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20734360
- Volume :
- 15
- Issue :
- 20
- Database :
- Complementary Index
- Journal :
- Polymers (20734360)
- Publication Type :
- Academic Journal
- Accession number :
- 173320570
- Full Text :
- https://doi.org/10.3390/polym15204151