马铃薯废渣／聚丙烯酸／坡缕石黏土高吸水树脂的制备及表征  

Preparation and Characterization of PWR-g-PAA/PGS Superabsorbent Resin

作　　者：李芳红[1] 沈智[1] 高淑玲[1] 魏博[1] 王小亮[1] 周鹏鑫[1] 张哲[1] 

机构地区：[1]西北师范大学化学化工学院甘肃省高分子材料重点实验室生态环境相关高分子材料教育部重点实验室,甘肃兰州730070

出　　处：《精细化工》2013年第9期1061-1067,共7页Fine Chemicals

基　　金：教育部“长江学者和创新团队发展计划”(IRT1177);西北师范大学青年教师科研能力提升计划项目(NWNU-LKQN-12-23)~~

摘　　要：采用马铃薯废渣(PWR,粒径<180目)作为纤维素和淀粉源,过硫酸钾(KSB)为引发剂,N,N'-亚甲基双丙烯酰胺(MBA)为交联剂,复配坡缕石(PGS)黏土,与部分中和的丙烯酸(AA)通过自由基引发在水溶液中接枝共聚制备低成本PWR-g-PAA/PGS高吸水树脂。借助扫描电镜(SEM)、红外光谱(FTIR)及热重分析(TGA)对高吸水树脂的形貌、结构及热稳定性进行了表征和分析,并测试其吸液性能。结果表明,当坡缕石黏土和马铃薯废渣的用量占反应体系总质量的17.5%时,WPR-g-PAA/PGS高吸水树脂对w(NaCl)=0.9%水溶液、蒸馏水的最大吸收量分别为41.0、538.6 g/g,保水率为96.1%,凝胶强度达11.3 kPa。通过高吸水树脂的吸水溶胀过程确定了材料的吸水动力学行为符合non-Fickon扩散模型。A low cost superabsorbent resin, PWR-g-PAA/PGS, based on the potato waste residue （PWR,particle size 〈 180 mesh） as the source of cellulose and starch, was prepared by free radical graft copolymerization of partly-neutralized acrylic acid （AA） on the chain of PWR mixed with palygorskite （PGS） in aqueous solution. The copolymerization was carried out using N, N＇-methylene double acrylamide （MBA） as cross-linking agent and potassium persulfate （KSB） as initiator. The morphology, structure and thermal stability of the polymers were characterized by means of scanning electron microscopy （ SEM ）, Fourier transform infrared spectroscopy （ FTIR ）, and thermo-gravimetric analysis （TGA）. The water-absorption capability of the polymers was also determined. The results show that the superabsorbent resin bears the maximum absorption amount of 41.0 g/g for w （NaC1） = 0.9% water solution and 538.6 g/g for distilled water. Water retention rate was 96.1% and gel strength was 11.3 kPa when the total adding amount of palygorskite and potato waste residue accounts for 17.5% in PWR-g-PAA/PGS. The swelling dynamics model of the resin was non-Fickon diffusion.

关 键 词：马铃薯废渣 保水率 凝胶强度 扩散模型 丙烯酸系列化学品 

分 类 号：TQ322.91[化学工程—合成树脂塑料工业]