School of Material and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China; Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, China.
School of Material and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China.
Int J Biol Macromol. 2017 Aug;101:314-320. doi: 10.1016/j.ijbiomac.2017.03.111. Epub 2017 Mar 22.
Poly (vinyl alcohol) (PVA)/corn starch blend films with enhanced properties were fabricated by melt processing and montmorillonite (MMT) reinforcing. It was revealed that strong hydrogen bonding occurred between the abundant OH groups of the matrix and polar SiOSi and OH groups of MMT. The highly exfoliated MMT nanolayers were randomly dispersed in the matrix containing MMT lower than 10wt%, whereas the intercalated structure was predominant with MMT content higher than 10wt%. With the increase of MMT, the glass transition temperature as well as equilibrium torque increased. The water sorption decreased and water resistant properties were improved with the incorporation of MMT due to the restricted swelling of the matrix by MMT nanolayers. Significant improvement in strength and flexibility were observed due to the fine dispersion of the MMT layers and the strong interaction between MMT and the matrix. The thermal stability was also improved. The MMT nanolayers could act as the heat and mass transport barriers and retard the thermal decomposition of the composites.
采用熔融加工和蒙脱土（MMT）增强的方法制备了具有增强性能的聚乙烯醇（PVA）/玉米淀粉共混膜。结果表明，基体中丰富的 OH 基团与极性 SiOSi 和 MMT 的 OH 基团之间发生了强烈的氢键相互作用。当 MMT 含量低于 10wt%时，高度剥离的 MMT 纳米片层在含有 MMT 的基体中随机分散，而当 MMT 含量高于 10wt%时，插层结构占主导地位。随着 MMT 的增加，玻璃化转变温度以及平衡扭矩增加。由于 MMT 纳米片层限制了基体的溶胀，因此水吸附减少，耐水性得到改善。由于 MMT 层的精细分散和 MMT 与基体之间的强相互作用，观察到强度和柔韧性的显著提高。热稳定性也得到了提高。MMT 纳米片层可以作为热和质量传输的屏障，延缓复合材料的热分解。
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