Byun Hun-Soo, Park Mi-Hwa, Lim Gyeong-Taek, Yoon Soon-Do
School of Biotechnology and Chemical System Engineering, Chonnam National University, Yeosu, Jeonnam 550-749, South Korea.
J Nanosci Nanotechnol. 2011 Feb;11(2):1701-5. doi: 10.1166/jnn.2011.3331.
In this study, biodegradable films were prepared by using corn starch, PVA, nano-sized poly(acrylamide-co-methyl methacrylate) (PAAm-co-MMA), nano-sized TiO2(P-25)/PAAm-co-MMA composite, and additives which are harmless to the human body, that is, glycerol (GL) and citric acid (CA). Nano-sized PAAm-co-MMA was synthesized by the method of emulsion polymerization. Also, nano-sized TiO2/PAAm-co-MMA composites were synthesized by wet milling for 48 h. The morphology and crystallinty of nano-sized PAAm-co-MMA and TiO2/PAAm-co-MMA composite was observed by the SEM and XRD. The physical properties such as tensile strength (TS), elongation at break (%E), degree of swelling (DS), and solubility (S) of biodegradable films were investigated. The photocatalytic degradability of starch/PVA/nano-sized TiO2/PAAm-co-MMA composite blended films was evaluated using methylene blue as photodegradation target.
在本研究中，采用玉米淀粉、聚乙烯醇（PVA）、纳米级聚（丙烯酰胺 - 共 - 甲基丙烯酸甲酯）（PAAm - co - MMA）、纳米级二氧化钛（P - 25）/PAAm - co - MMA复合材料以及对人体无害的添加剂，即甘油（GL）和柠檬酸（CA），制备了可生物降解薄膜。纳米级PAAm - co - MMA通过乳液聚合法合成。此外，通过湿磨48小时合成了纳米级TiO₂/PAAm - co - MMA复合材料。通过扫描电子显微镜（SEM）和X射线衍射仪（XRD）观察纳米级PAAm - co - MMA和TiO₂/PAAm - co - MMA复合材料的形态和结晶度。研究了可生物降解薄膜的物理性能，如拉伸强度（TS）、断裂伸长率（%E）、溶胀度（DS）和溶解度（S）。以亚甲基蓝作为光降解目标，评估了淀粉/PVA/纳米级TiO₂/PAAm - co - MMA复合共混薄膜的光催化降解性能。
