丙烯酸高吸水性聚合物的室温原位合成与吸/释水性能研究  

Study on in-situ room temperature synthesis and water absorption/releaseproperties of acrylic super absorbent polymer

作　　者：刘森彪 朱建锋[1] 杜之琳 张彪[1] LIU Sen-biao;ZHU Jian-feng;DU Zhi-lin;ZHANG Biao(School of Material Science and Engineering(School of Antiquities Preservation Science and Technology),Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials,Shaanxi University of Science&Technology,Xi′an 710021,China)

机构地区：[1]陕西科技大学材料科学与工程学院(文物保护科学与技术学院)陕西省无机材料绿色制备与功能化重点实验室,陕西西安710021

出　　处：《陕西科技大学学报》2023年第4期92-96,共5页Journal of Shaanxi University of Science & Technology

基　　金：国家重点研发计划项目(2019YFC1520100);国家自然科学基金项目(52272020);中国博士后科学基金面上项目(2021M691997);陕西省教育厅重点科研计划项目(22JY009)。

摘　　要：以丙烯酸(AA)、丙烯酰胺(AM)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)为单体,N,N′-亚甲基双丙烯酰胺(NMBA)为交联剂,过硫酸铵((NH4)2S2O8)与硫代硫酸钠(Na_(2)S_(2)O_(3))为氧化还原引发剂,氢氧化钠(NaOH)为中和剂,采用自由基水共聚法在室温下制备出了丙烯酸高吸水性聚合物(SAP).采用FI-IR、GPC、TG、SEM等测试手段对合成产物进行了分析与表征,探究了交联剂对其性能的影响.结果表明:生成的SAP在240℃以下未发生分解,具有良好的热稳定性;交联剂含量为0.01%时吸水倍率最大,为625.21 g/g,且在60℃下24 h干燥,比水分自由蒸发水分持有量高19.06%,循环吸水五次后仍可稳定达到600 g/g以上的吸水倍率.In this paper,acrylic super absorbent polymer(SAP)was synthesizes by the free radical water copolymerization method at room temperature with acrylic acid(AA),acrylamide(AM),2-acrylamide-2-methylpropanesulfonic acid(AMPS)as the monomer,N,N’-methylene bisacrylamide(NMBA)as the cross-linking agent,ammonium persulfate((NH 4)2S 2O 8)and sodium thionosulfate(Na_(2)S_(2)O_(3))as the redox initiator,sodium hydroxide(NaOH)as the neutralizing agent.The as-prepared products were analyzed and characterized by FI-IR,GPC,TG and SEM,and the effect of the crosslinker on properties for SAP was also investigated.The result shows that the undecomposed SAP has good thermal stability under 240℃.When the content of crosslinker is 0.01%,the water absorption rate could reach the maximum value(625.21 g/g).After drying at 60℃for 24 hours,the water holding rate reachs 19.06%,which is higher than that of free evaporation of water.After five cycles of water absorption,the water absorption rate could still reach more than 600 g/g stably.

关 键 词：高吸水性聚合物 交联剂 自由基水共聚法 保水性能 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]