School of Materials and Mineral Resources Engineering, University Science of Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia.
School of Materials and Mineral Resources Engineering, University Science of Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia.
Carbohydr Polym. 2015 Sep 5;128:1-10. doi: 10.1016/j.carbpol.2015.04.004. Epub 2015 Apr 10.
Starch-graft-acrylonitrile (ANS) is compounded with carboxylated nitrile butadiene rubber (XNBR) latex. The control XNBR and the ANS/XNBR latex films were prepared through a coagulant dipping process. The films were subjected to ageing and soil burial procedures. For the biodegradation experiment, the surface of the film was assessed after the 2nd, 4th and 8th week of soil burial. The ANS, XNBR, and ANS/XNBR colloidal stability were determined with a Malvern Zetasizer. For the dipped latex films, the mechanical, morphological and thermal properties were analyzed. The addition of ANS into the XNBR latex increased the stability of the colloidal dispersions, decreased the latex film tensile strength, but increased the elongation at break due to the bipolar interaction of the ANS and XNBR particles. The ANS/XNBR latex films aged faster than the control films while the morphological analysis showed the existence of a starch crystal region and the formation of microbial colonies on the surfaces of the films. Based on the TGA-DTA curves, a higher ΔT was observed for the ANS/XNBR latex films signifying high thermal energy needed for the film to thermally degrade.
淀粉接枝丙烯腈（ANS）与羧基丁腈橡胶（XNBR）胶乳复合。通过凝固剂浸渍工艺制备对照 XNBR 和 ANS/XNBR 乳胶膜。对薄膜进行老化和土壤掩埋处理。对于生物降解实验，在土壤掩埋的第 2、4 和 8 周后评估薄膜的表面。使用 Malvern Zetasizer 确定 ANS、XNBR 和 ANS/XNBR 的胶体稳定性。对于浸渍的乳胶膜，分析了机械、形态和热性能。ANS 的加入增加了胶乳分散体的稳定性，降低了乳胶膜的拉伸强度，但由于 ANS 和 XNBR 颗粒的双极相互作用，断裂伸长率增加。与对照薄膜相比，ANS/XNBR 乳胶膜老化速度更快，而形态分析表明在薄膜表面存在淀粉晶体区域和微生物菌落的形成。根据 TGA-DTA 曲线，观察到 ANS/XNBR 乳胶膜的 ΔT 较高，表明薄膜热降解需要较高的热能。
