摘要
以丙烯酸(AA)和丙烯酰胺(AM)为黄原胶(XG)的接枝改性剂,采用反向悬浮聚合法制备了高吸水性树脂——接枝改性共聚物(XG-g-AA/AM)。采用U*10(104)均匀设计法对XG-g-AA/AM的合成工艺进行了优化。结果表明:XG-g-AA/AM的最佳合成条件为m(AA)=10.0 g、w(引发剂)=0.5%(相对于单体总质量而言)、AA中和度80%和反应温度60℃,此时XG-g-AA/AM的吸水倍率为890.1 g/g、吸盐水倍率为172.2 g/g;热失重分析(TGA)结果显示,XG-g-AA/AM的热稳定性优于XG;扫描电镜(SEM)观测结果显示,XG-g-AA/AM表面形成的多孔网络结构,有利于其对水分子的接触与吸附。
With acrylic acid（AA） and acrylamide（AM） as graft-modifier of xanthan gum（XG） ,a superabsorbent polymer[namely graft modified copolymer（XG-g-AA/AM）] was prepared by inverse suspension polymerization. The synthesis process of XG-g-AA/AM was optimized by U＊m（10^4）-uniform design experiment. The resuhs showed that the optimal synthesis conditions of XG-g-AMAM were obtained when AA was 10 g,mass fraction of initiator was 0.5% in total monomers,AA＇s neutralisation degree was 80% ,and reaction temperature was 60℃. Here,its water absorhency or salt-water absorbency were 890.1 g/g or 172.2 g/g. TGA（thermal gravimetrie analysis） resuhs showed that the thermal stability of XG-g-AA/AM was better than that of XG. SEM（scanning electron microscope） observations showed that the XG-g-AA/AM could better contact and adsorb water molecules because XG-g-AA/AM surface had a porous network structure.
出处
《中国胶粘剂》
CAS
北大核心
2012年第9期13-16,共4页
China Adhesives
基金
陕西省科技计划项目(2008K06-15)
"十一五"国家科学技术支撑计划项目(2006BAD09B04)
陕西科技大学研究生创新基金资助项目
关键词
黄原胶
丙烯酸
丙烯酰胺
高吸水性树脂
xanthan gum （XG）
acrylic acid （AA）
acrylamide （AM）
superabsorbent polymer
