GMA改性水溶性PVA纤维的制备及其增强作用

Synthesis of Water-soluble PVA Fiber Modified with GMA and Its Strengthening Effect

摘要:

摘要：通过悬浮接枝共聚法以甲基丙烯酸缩水甘油酯(GMA)为功能化单体，制备了一种具有反应活性的聚乙烯醇(PVA)纤维。研究了纸张中改性PVA纤维的质量分数和干燥温度对纸张耐折度、抗张强度以及湿强度的影响。研究结果表明，当改性PVA纤维所占的质量分数为9%，纸张干燥温度为110℃时，纸张获得较佳强度，耐折度为73次，干拉力为70.4N，湿拉力为16.2N。热重分析(TGA)表明GMA在纤维表面发生了接枝共聚反应。原子力显微镜(AFM)照片显示，改性PVA纤维形成了表面乳突结构，有助于形成疏水表面。纸张的扫描电镜(SEM)照片显示，添加改性PVA纤维的纸张，其耐折测试断裂面纤维的长度较短，且纸张表面PVA纤维的溶解程度显著下降。

Abstract:

Abstract：Modified polyvinyl alcohol (PVA) fibers with reaction activity were synthesized via suspension grafting copolymerization using glycidyl methacrylate (GMA) as functional monomer. The effects of modified PVA fiber mass fraction and drying temperature on folding endurance, tensile strength and wet strength were investigated. The results show that the desired condition for a better strength of paper is as follow: the mass fraction of modified PVA fiber is 9%, drying temperature is 110℃. At this time, folding endurance is 73 times, dry tensile strength is 70.4N, wet tensile strength is 16.2N. The structure of modified PVA fibers was characterized by TGA, which showed that the grafting copolymerization of GMA took place on the surface of PVA fiber. AFM photographs show that the formation of mastoid structure on the surface of modified PVA fiber contributes to the creation of hydrophobic surface. SEM photographs show that the length of fibers on the fractured edge of paper containing modified PVA fibers is shorter and the dissolution degree of modified PVA fibers is decreased significantly.