采用超声分散并浇注成膜法制备了聚乳酸/金红石型二氧化钛(PLIA/Rutile TiO2)、聚乳酸/锐钛型二氧化钛(PLLA/Anatase TiO2)两种杂化薄膜.通过扫描电镜(SEM)观察、红外吸收光谱(FT-IR)测定、差示扫描量热(DSC)分析、热失重(TGA)分析等方法,研究了聚乳酸经紫外光辐照后的结构性能变化及不同晶型TiO2在改善聚乳酸抗紫外光性能方面的作用.结果表明,经空气氛中紫外光的作用,聚乳酸分子链中与羰基相连的碳-氧键(C-O键)断裂,生成羧基(-COOH)和羟基(-OH);Rutile TiO2和Anatase TiO2的加入均可抑制紫外光对聚乳酸分子的破坏作用,Rutile TiO2的抑制作用比Anatase TiO2强.
参考文献
| [1] | Kenji Sakai;Hiroyuki Kawano;Akihiko Iwami .Isolation of a Thermophilic Poly-L-Lactide Degrading Bacterium from Compost and Its Enzymatic Characterization[J].Journal of Bioscience and Bioengineering,2001(3):298-300. |
| [2] | Hoshino A;Isono Y .Degradation of aliphatic polyester films by commercially available lipases with special reference to rapid and complete degradation of poly(L-lactide) film by lipase PL derived from Alcaligenes sp.[J].Biodegradation,2002(2):141-147. |
| [3] | Cornelus F.Van Nostrum;Theo F.J.Veldhuis;Gert W.bos;Wim E.Hennink .Hydrolytic degradation of oligo(lactic acid):a kinetic and mechanistic study[J].Polymer: The International Journal for the Science and Technology of Polymers,2004(20):6779-6787. |
| [4] | David Karst;Yiqi Yang .Molecular modeling study of the resistance of PLA to hydrolysis based on the blending of PLLA and PDLA[J].Polymer: The International Journal for the Science and Technology of Polymers,2006(13):4845-4850. |
| [5] | 郭刚,杨定明,熊玉竹,段小平,黄婉霞,涂铭旌.纳米TiO2和纳米ZnO的紫外光学特性及其在聚丙烯抗老化改性中的应用研究[J].功能材料,2004(z1):183-187. |
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