黄原胶改性制备高吸水性树脂的研究  

Study on preparing superabsorbent polymer modified by xanthan gum

作　　者：耿肖沙[1] 苏秀霞[1] 李仲谨[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》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

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.

关 键 词：黄原胶 丙烯酸 丙烯酰胺 高吸水性树脂 

分 类 号：TQ432.2[化学工程]