增强物理交联提升聚乙烯醇耐湿耐热性能  

Enhancing Physical Crosslinking to Improve the Moisture and Heat Resistance of Poly(vinyl alcohol)

作　　者：马康骁 马文中 张佑 杨海存 MA Kangxiao;MA Wenzhong;ZHANG You;YANG Haicun(Jiangsu Provincial Key Laboratory of Environmentally Friendly Polymer Materials,School of Materials Science and Engineering,Changzhou University,Changzhou 213164,Jiangsu,China)

机构地区：[1]常州大学材料科学与工程学院,江苏省环境友好高分子材料重点实验室,江苏常州213164

出　　处：《功能高分子学报》2024年第3期241-250,共10页Journal of Functional Polymers

基　　金：常州市科技计划(CZ20230022);江苏省研究生科研与实践创新计划(KYCX23_3046)。

摘　　要：利用玉米淀粉(CS)和桃胶(PG)协同改性聚乙烯醇(PVA)法,制备了PVA/CS/PG复合膜,考察了PVA分子量、不同CS添加量以及PG添加量(在相同CS添加量条件下)对PVA/CS/PG复合膜耐湿、耐热性能的影响。结果表明:CS与PG的羟基与PVA发生了氢键相互作用,PVA/CS/PG复合膜的晶粒尺寸减小,交联密度增加。同时,随着CS和PG含量的增加,复合膜的网格尺寸逐渐减小,热稳定性能提升。水蒸气透过测试表明,当w(CS)=2%和w(PG)=2%时,PG/CS/PVA复合膜含水率较未处理原膜提升了11.5%,水蒸气透过率下降了43%。Poly(vinyl alcohol)(PVA)composite films were synergistically modified by adding corn starch(CS)and peach gum(PG).The effects of PVA molecular weight,different CS addition,and the PG incorporation with the same CS addition on the moisture and heat resistance of PVA/CS/PG composite film were investigated.The results show that the hydroxyl groups of CS and PG interact with PVA chains by hydrogen bonding.The crystal size of PVA in the PVA/CS/PG composite film decreases,while the crosslinking density increases.At the same time,with the increase of CS and PG content,the network mesh size of the composite film gradually decreases,and the thermal stability can be improved.The water vapor permeability test shows that as w(CS)=2%and w(PG)=2%,the water content of PG/CS/PVA composite film increases by 11.5%,while the water vapor permeability decreases by 43%.

关 键 词：聚乙烯醇 玉米淀粉 桃胶 网络结构 水蒸气透过率 氢键 

分 类 号：TB332[一般工业技术—材料科学与工程]