PVA商标胶的改性及其耐冰水性能研究  

Study on modification and ice water resistance of PVA label adhesive

作　　者：苏秀霞[1] 周丽[1] 郭明媛[1] 

机构地区：[1]陕西科技大学,教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《中国胶粘剂》2014年第6期29-32,共4页China Adhesives

基　　金：陕西科技大学研究生创新基金项目(SUST-B)

摘　　要：以硫酸铝为无机交联剂、淀粉为分散剂,制备出环保无毒、低成本的改性聚乙烯醇(PVA)商标胶;以耐冰水性能作为考核指标,采用单因素试验法优选出制备改性PVA商标胶的最佳工艺条件。研究结果表明:当w(PVA)=20%(相对于水质量而言)、m(硫酸铝)=4 g、m(淀粉)=8 g、反应温度为85℃和反应时间为3.0 h时,改性PVA商标胶的综合性能得到明显改善(其外观呈无色半透明黏稠液、黏度为85 Pa·s、凝固点为3℃、pH为6.8和保质期为240 d),并且其耐冰水性能良好(接触角由50.39°增至86.32°)。With aluminum sulfate as inorganic crosslinker, starch as dispersing agent, a modified PVA （polyvinyl alcohol） label adhesive with environmental protection non-toxic and low cost was prepared. With ice water resistance as evaluation index, the optimal process conditions of preparing modified PVA label adhesive were preferred by single-factor experiment. The research results showed that the combination property of modified PVA label adhesive was obviously improved （its appearance with colourless-translucent and sticky liquht, viscosity at 85 Pa＇s, freezing point at 3 ℃, pH at 6.8, and shelf life at 240 d） , and it had good ice water resistance （contact angle from 50.39° to 86.32° ） when mass fraction of PVA was 20% in water, aluminum sulfate and starch were 4 g and 8 g respectively, reaction temperature and reaction time were 85 ℃ and 3.0 h respectively.

关 键 词：聚乙烯醇 商标胶 改性 耐冰水性能 硫酸铝 

分 类 号：TQ433.439[化学工程]