光降解性丙烯酸系高吸水树脂的合成及其性能  

Synthesis of Photocatalytic Degradation of Acrylic Superabsorbent and Its Property

作　　者：余训民[1] 庄田[1] 余响林[2] 关洪亮[1] 

机构地区：[1]武汉工程大学化学与环境工程学院,湖北武汉430073 [2]武汉工程大学化工与制药学院,湖北武汉430073

出　　处：《武汉大学学报（理学版）》2016年第1期97-102,共6页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金(51203127)资助项目;湖北省教育厅科学技术研究项目[2015321]

摘　　要：针对丙烯酸系高吸水树脂在自然界存在可降解性差的问题,通过在淀粉接枝丙烯酸系高吸水树脂上负载纳米级TiO_2提高树脂在自然界中光降解能力.实验结果表明:采用Span-80为分散剂,反应体系最稳定;相同的光照时间和光照强度下,当淀粉用量(相对于丙烯酸+丙烯酰胺总质量)为35%,TiO_2粒径为18.7nm,TiO_2用量(相对接枝树脂质量)为4%时,树脂的吸水倍率最高达695,自然光照30d内接枝树脂降解率达75%以上.纳米TiO_2的引入有效提高了树脂的光降解性能.Aiming at the poor degradability of acrylic superabsorbent in nature, a novel method was proposed to improve the photo-degradation properties by loading nano titanium dioxide on the starch grafted acrylic resin. The re- sults indicated that the reaction system was the most stable when Span-80 was utilized as dispersing agent. Under the same lighting time and strength, the degradability rate of acrylic resin was more than 75G in 30 days while the amount of starch was 35% of the total of acroleic acid and acrylic amide, the particle size of TiO2 was 18.7 nm and the amount of TiO2 was 4% （base on starch grafted resin）, the absorbent times of resin was up to 695. The introduction of TiO2 effectively improved the optical-degradation properties of the resin.

关 键 词：光降解 丙烯酸 高吸水树脂 淀粉 二氧化钛(TiO2) 

分 类 号：TQ325[化学工程—合成树脂塑料工业] TQ314