甲基丙烯酸缩水甘油酯对水溶性聚乙烯醇纤维的表面改性及增强机理  

Surface Modification of Water Soluble Polyvinyl Alcohol Fiber with Glycidyl Methacrylate and Its Strengthening Mechanism

作　　者：柯勇[1] 沈一丁[1] 费贵强 王海花[1] 

机构地区：[1]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《高分子材料科学与工程》2013年第12期103-106,111,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21204046);陕西省教育厅专项项目(2010JK433;2010JK440)

摘　　要：以硝酸铈铵(CAN)作为引发剂,采用甲基丙烯酸缩水甘油酯(GMA)通过悬浮接枝共聚法对水溶性聚乙烯醇(PVA)纤维进行表面改性。讨论了GMA添加量、CAN浓度、H+浓度对PVA纤维接枝率(GR)的影响,以及GR对纸张强度的影响。研究结果表明,当GMA浓度为0.2mol/L,CAN浓度为6×10-3mol/L,H+浓度为0.1mol/L时,GR为35%,纸张获得较佳强度,耐折度为56次,干拉力为68.2N,湿拉力为17.8N。FT-IR表明,GMA在原纤维表面发生了接枝共聚反应。SEM表明,改性后PVA纤维表面由槽状结构变为鳞片状结构。Suspension grafting copolymerization was adopted to surface modification of water soluble polyvinyl alcohol （PVA） fiber with glycidyl methacrylate （GMA）, using ceric ammonium nitrate （CAN） as initiator. The influence of GMA content, concentration of initiator and H＋ on grafting rate （GR） of PVA fiber together with the influence of GR on paper strength was discussed. The results show that the optimum condition for a satisfactory GR is as follow： the concentration of GMA, CAN and H＋ is 0.2tool/L, 6 ×10-3mol/L and 0. lmol/L respectively. At this time, GR is 35 %, paper gains get better strength, folding endurance is 56 times; dry tensile strength is 68.2N; wet tensile strength is 17.8N. FT-IR shows that the grafting copolymerization of GMA has taken place on the surface of PVA fiber. SEM photographs show that the surface morphology of modified PVA fiber transforms from groove structure to scaly structure.

关 键 词：甲基丙烯酸缩水甘油酯 聚乙烯醇纤维 表面改性 增强机理 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]