光-生物可降解LDPE/纳米TiO_(2)/TPS复合膜材料的制备及性能研究  

Preparation and properties of photo-biodegradable LDPE/nano-TiO_(2)/TPS composite film materials

作　　者：李凤红[1] 李鹏珍 笪伟 王哲 师岩 Li Fenghong;Li Pengzhen;Da Wei;Wang Zhe;Shi Yan(School of Petrochemical Engineering,Shenyang University of Technology,Liaoyang 111003)

机构地区：[1]沈阳工业大学石油化工学院,辽阳111003

出　　处：《化工新型材料》2023年第1期290-295,共6页New Chemical Materials

摘　　要：以低密度聚乙烯(LDPE)为基体,采用改性纳米二氧化钛(纳米TiO_(2))光降解剂和糊化处理后的淀粉(TPS)生物降解剂,通过密炼机和平板硫化机制备了光-生物可降解LDPE/纳米TiO_(2)/TPS复合膜材料,并对其进行了热性能、力学性能、光降解性能和生物降解性能研究。实验结果表明,添加光-生物降解剂后,光-生物可降解膜的降解能力明显高于纯LDPE膜,并且随着TPS生物降解剂的增多,膜材料的结晶度和力学性能增加,降解能力更加明显。当TPS的质量为LDPE基体的20%时,复合膜材料的结晶度最大,为29.3%。In this paper, using Low-density polyethylene(LDPE) as the matrix material, modified nano-titanium dioxide(nano-TiO_(2)) as photodegradation agent and gelatinized starch(TPS) as biodegradation agent, the photo-biodegradable LDPE/nano-TiO_(2)/TPS composite membrane materials were prepared by an internal mixer and a flat vulcanizer.The thermal properties, mechanical properties, photodegradation and biodegradability of the composite film materials were further studied.The results showed that the degradation ability of the photo-biodegradable film, after adding photo-biodegradable agent, was obviously higher than that of the pure LDPE film.Furthermore, the crystallinity and mechanical properties of the film materials increased with the increase of TPS biodegradable agent, and the degradation ability of the photo-biodegradable LDPE/nano-TiO_(2)/TPS composite film became more obvious.When the mass of TPS was 20% of LDPE matrix, the maximum crystallinity of the composite film material was 29.3%.

关 键 词：光-生物可降解 纳米二氧化钛 淀粉 低密度聚乙烯 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]