不同条件制备聚丙烯酸水凝胶的结构与性能  

The structure and properties of polyacrylic acid hydrogels under different preparation conditions

作　　者：张金玉 曲德智 王舒羽 ZHANG Jinyu;QU Dezhi;WANG Shuyu(School of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China;Guangxi Key Laboratory of Green Processing of Sugar Resources(Guangxi University of Science and Technology),Liuzhou 545006,China)

机构地区：[1]广西科技大学生物与化学工程学院,广西柳州545006 [2]广西糖资源绿色加工重点实验室(广西科技大学),广西柳州545006

出　　处：《广西科技大学学报》2024年第2期103-110,共8页Journal of Guangxi University of Science and Technology

基　　金：国家自然科学基金青年科学基金项目(2209028);广西科技基地和人才专项项目(桂科AD21075032);广西高校中青年教师科研基础能力提升项目(2021KY0359);研究生教育创新计划项目(GKYC202236)资助。

摘　　要：采用乳液聚合方法将引发剂过硫酸铵(APS)和乳化剂十二烷基硫酸钠(SDS)制备出聚丙烯酸树脂乳液,再加入不同条件交联剂固化成聚丙烯酸(PAA)水凝胶,并探究使用紫外固化和热固化2种不同固化方式及不同固化时间对PAA水凝胶性能的影响。通过氮气等温吸脱附曲线测试(Brunauer-Emmet-Teller,BET)、扫描电子显微镜(scanning electron microscope,SEM)、热失重分析(thermogravimetric analysis,TGA)、溶胀度、力学测试等方法,对水凝胶的性能进行表征分析。结果表明,形成的PAA水凝胶主要为片状颗粒材料,在紫外固化20 min条件下,其孔径主要分布在2~4 nm;且在热固化条件下,当交联剂质量浓度为0.06、0.07 g/mL时PAA水凝胶溶胀度可达到667%,在交联剂质量浓度为0.09 g/mL时拉伸强度可达到60 k Pa。综上所述,对比紫外固化和热固化2种方法以及不同条件交联剂下制备的PAA水凝胶的差异,对理解和优化PAA水凝胶的制备具有一定的指导意义。The polyacrylic acid resin emulsion was prepared by emulsion polymerization with the initiator ammonium persulfate(APS)and the emulsifier sodium dodecyl sulfate(SDS),and then cured into polyacrylic acid(PAA)hydrogels by adding cross-linking agents under different conditions.The effects of using two different curing methods,UV curing and thermal curing,and different curing times on the properties of PAA hydrogels were also investigated.The properties of the hydrogels were characterized and analyzed by nitrogen isothermal adsorption and desorption curve test(Brunauer-Emmet-Teller,BET),scanning electron microscopy(SEM),thermogravimetric analysis(TGA),solubility,and mechanical test.The results showed that the formed PAA hydrogels were mainly flaky particles,and the pore size was mainly distributed in 2~4 nm under UV curing for 20 min;and the swelling degree of PAA hydrogels with crosslinking agent concentration of 0.06 and 0.07 g/mL under thermal curing could reach 667%,and the tensile strength of PAA hydrogels with crosslinking agent concentration of 0.09 g/mL could reach 60 kPa.Therefore,comparing the different methods of UV and thermal curing as well as conditions of crosslinking agent in the preparation of PAA hydrogels is conducive to the understanding and optimization of the preparation of PAA hydrogels.

关 键 词：聚丙烯酸水凝胶 制备条件 紫外固化 热固化 

分 类 号：TQ427.26[化学工程]