均匀设计法优化一种高吸水性树脂的制备工艺

摘要

A super absorbent resin,xanthan gum-g-poly（acrylic acid-co-2-acrylanido-2-methlpropanesulfonic acid）[XG/P（AA-AMPS）],was prepared by solution polymerization in this study.The synthesis process was optimized by using U10 ＊（104）uniform design.The results showed that the best weight ratio of acrylic acid is 12 g,the amount of initiator is 0.5%,the neutralization degree of acrylic acid is 80% and the synthesis temperature of graft copolymerization is 60 ℃.Under the optimal condition of absorbent resin synthesizing,the water absorption multiple is up to 997.1 g/g,with normal saline is up to 176.2 g/g.The fourier infrared spectroscopy（FTIR）,scanning electron microscopy（SEM） and integrated thermal analyzers were used for the characterization of the super absorbent resin.The results of FTIR characterization show that acrylic acid（AA）and 2-acrylanido-2-methlpropanesulfonic acid（AMPS）are grafted to the molecular chain of xanthan gum,and the SEM observation results showed that the resin forms a porous network structure.The thermal performance analysis results show that the resin has good thermal stability at high temperature.%采用水溶液聚合的方法制备了黄原胶接枝丙烯酸/2-丙烯酰胺基-2-甲基丙磺酸[XG/P（AA-AMPS）]高吸水树脂。采用U10＊（104）均匀设计对合成工艺进行优化,得出最佳合成条件为丙烯酸用量12 g、引发剂用量为单体总量的0.5%、丙烯酸的中和度为80%、聚合反应温度60℃。最佳合成条件下制备的高吸水性树脂吸水倍率达997.1 g/g,吸生理盐水倍率为176.2 g/g。采用傅里叶红外光谱（FTIR）、扫描电镜（SEM）和综合热分析仪对高吸水树脂进行表征。红外光谱分析结果显示丙烯酸（AA）和2-丙烯酰胺基-2-甲基丙磺酸（AMPS）已接枝到黄原胶分子链上,扫描电镜观察结果显示树脂形成一种多孔性网络结构,热性能分析结果显示树脂在高温下具有良好的热稳定性。