等离子体协同引发共聚制备纤维素高吸水材料的研究

Preparation of Water-absorbing Materials by Fiber Grafting Polymerization

关键词:  等离子体  纤维素  吸水材料  接枝共聚  吸水倍率

Key Words:plasma  cellulose  bibulous materials  graft polymerization  bibulous rate

摘要:以漂白蔗渣浆为原料，采用自由基引发接枝共聚的方式，在等离子体和过硫酸钾协同引发作用下，使纤维素和丙烯酸及丙烯酰胺发生接枝共聚反应制备了吸水材料。并通过红外光谱和X射线衍射对所制备的吸水材料进行了结构表征。实验结果表明，纤维素与丙烯酸和丙烯酰胺发生了接枝共聚反应，优化实验条件为：等离子体电压150 V，放电时间120 s，真空度160 Pa，单体与纤维质量比8∶1，丙烯酸与丙烯酰胺质量比1∶1，丙烯酸中和度70%，过硫酸钾占单体用量的2%，N，N-亚甲基双丙烯酰胺占单体用量的0.24%，单体溶液浓度20%，反应温度80℃，反应时间20 min，在此条件下制备的吸水材料最大吸水倍率为684 g/g。

Abstract:The water absorbing material was prepared by using bagasse bleached pulp fiber as a raw material to carry out the grafting polymerization with acrylic acid and acrylamide under the synergetic initiation of plasma and potassium sulfate. And the water-adsorbing material was charactered by Fourier transform infrared spectrometer and X ray diffraction, the experimental results showed that grafting polymerization between cellulose and acrylic acid and acrylamide was realized.