响应面法优化HB/PAA复合高吸水性材料的制备  

Optimization synthesis of HB/PAA superabsorbent materials by response surface methodology

作　　者：许晓辉[1] 白波[2] 丁晨旭[2] 王洪伦[2] 索有瑞[2] 

机构地区：[1]长安大学环境科学与工程学院,西安710054 [2]中科院西北高原生物研究所,西宁810001

出　　处：《化工新型材料》2015年第8期83-86,共4页New Chemical Materials

基　　金：中国博士后特别资助项目(201104615);中央高校基本科研业务费专项资金(2013G2291015)

摘　　要：以废弃沙棘枝条(HB)和丙烯酸(AA)为原料,采用自由基溶液聚合法制备沙棘枝条/聚丙烯酸(HB/PAA)复合高吸水性材料。采用Box-Behnken响应面法,就引发剂、交联剂、中和度3个因素对吸水材料吸水性能的影响进行分析。结果显示,最佳的合成条件是:中和度为72.5%,引发剂和交联剂的用量分别为单体质量的1.3%(wt,质量分数,下同)、0.5%。在此条件下,HB/PAA的吸水倍率实际值为273.5g/g,与理论值相近。同时通过场发射扫描电镜表征所制备的高吸水性材料。HB/PAA superabsorbent composites were synthesized by free-radical aqueous copolymerization, using waste Hippophae rhamnoides Linn. branch and acrylic acid as raw materials. The influence of content of initiator and crosslinker and the degree of neutralization on water absorbency was studied using response surface methodology based on Box-Behnken design. The optimum conditions showed that the degree of neutralization was 72.5 % ,the content of initiator and crosslinker content were 1.3wt% and 0.5wt%, respectively. Under these conditions, the experimental value of water absorbency was 273.5g/g,which was close to the theoretical value（275, lg/g）. The structure of obtained products was determined by FE-SEM.

关 键 词：沙棘枝条 聚丙烯酸 高吸水性材料 响应面法 吸水能力 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业]