摘要
以风化煤中提取的腐植酸(HA)和丙烯酸(AA)为原料,利用水溶液聚合法合成腐植酸基高吸水性树脂(HA-PAA),分析过硫酸铵(APS)、N,N′-亚甲基双丙烯酰胺(MBA)、腐植酸(HA)用量及NaOH中和度对合成树脂吸水倍率的影响;通过红外光谱仪和扫描电镜对吸水性树脂进行分析,测试其耐盐、耐酸碱、耐温和保水性能。结果表明,水溶液聚合法合成HA-PAA最佳条件为HA质量分数6%,NaOH中和度50%,MBA质量分数0.04%,APS质量分数2.1%。该条件下制备的HA-PAA,吸纯水倍率最高可达1 403 g·g^(-1),吸盐水倍率最高可达214.5 g·g^(-1),可反复使用多次。通过表征结果可证实HA和PAA发生充分聚合反应,HA-PAA生成后表面更加粗糙,疏松多孔且呈现分层现象,合成树脂的吸水性大幅提升。
The humic acid and acrylic acid extracted from the weathered coal were taken as the raw material. The effects of factors such as the ammonium sulphate (APS) dosage,the amount of N,N′-methylenebisacrylamide(MBA),the amount of HA and the neutralization degree of NaOH on the water absorption capacity were discussed to determine the best synthetic conditions. FTIR and SEM were adopted to characterize and analyze the resin. Experiments were carried out to test its properties of salt-resistance,pH-resistance,temperature-resistance and water retention. The results show that the optimum reaction conditions of HA-PAA by aqueous solution are as follows: the neutralization degree of NaOH is 50%,and the mass ratio of the HA,MBA,APS,is 6%,0.04%,2.1% respectively. HA-PAA that has good performance can be used repeatedly. The absorbency in distilled water can reach 1 403 g·g^-1 and the absorbency in saline water can reach 214.5 g·g^-1 under the optimums conditions. The polyreaction occurs between the humic acid and acrylic acid. The resin′s surface is found to be rough,loose and layered,and the porosity increases,which can enhance the water absorbency of the resin.
作者
姜洁
郭雅妮
徐斗均
马畅柠
杨靖
JIANG Jie;GUO Yani;XU Doujun;MA Changning;YANG Jing(School of Environmental and Chemical Engineering,Xi′an Polytechnic University,Xi′an 710048,China;School of Urban Planning and Municipal Engineering,Xi′an Polytechnic University,Xi′an 710048,China)
出处
《西安工程大学学报》
CAS
2019年第1期51-56,94,共7页
Journal of Xi’an Polytechnic University
基金
陕西省科技厅工业科技攻关项目(2015GY168)
陕西省重点研发计划项目(2017GY-121)
西安市科技局科技创新引导项目(201805030YD8CG14(13))
关键词
腐植酸
丙烯酸
高吸水性树脂
水溶液聚合法
吸水性
humic acid
acrylic acid
super absorbent polymer
aqueous solution polymerization
water absorbency
