反相悬浮共聚法合成耐盐快吸水性树脂  

SYNTHESIS OF WATER-ABSORBENT RESIN WITH HIGH SALINE-ABSORBABILITY AND PENETRABILITY BY INVERSE SUSPENSION COPOLYMERIZATION

作　　者：陈密峰[1] 张秀娟[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南省高等学校环境科学与工程重点实验室,河南新乡453002

出　　处：《化工学报》2003年第11期1627-1631,共5页CIESC Journal

基　　金：河南省自然科学基金资助项目(No 9715 0 0 10 )~~

摘　　要：以AA(丙烯酸 )、AMPS ( 2 丙烯酰胺 2 甲基丙烷磺酸 )为单体 ,APS(过硫酸铵 )为引发剂 ,MBAM(N ,N 亚甲基双丙烯酰胺 )为交联剂 ,十八醇磷酸单酯为分散稳定剂 ,环己烷为连续相 ,采用反相悬浮法合成吸盐水率高、吸水速率快的共聚型吸水树脂 .研究了单体组成、交联剂浓度、AA中和度 (Dn)、引发剂浓度、共聚温度 (T)、油水相体积比对树脂吸盐水率和吸水率、吸水速率及物理性状的影响 .当w(AMPS) =4 0 %、c(MBAM) =1 6 2mmol·L-1、Dn =75 %、c(APS) =2 4 70mmol·L-1、T =6 5℃、V(油 )∶V(水 ) =1 5∶1 0时 ,共聚物的吸盐水率和吸水率分别为 :A生理盐水 =2 6 4ml·g-1,A蒸馏水 =12 0 0ml·g-1,15min可吸水饱和 .通过热分析发现 ,提高共聚物的交联密度利于改进共聚物的保水性 .A water-absorbent resin with high absorbability in saline and high absorption rate was synthesized by inverse suspension copolymerization, with cyclohexane as continuous phase, AA and AMPS as monomers, stearic phosphate as dispersing agent, N, N-mythylene bisacrylamide as crosslinker and APS (ammonium persulphate) as initiator. The effects of monomers composition, copolymerization temperature, neutralization degree of AA (Dn), initiator concentration, type and concentration of crosslinker and ratio of oil to water on the absorbability and absorption rate, and physical properties of the resin were studied. When w(AMPS)=40%, c(MBAM)=1.62 mmol&middotL-1, Dn=75%, c(APS)=24.70 mmol&middotL-1, T=65°C and V(oil):V(water)=1.5:1.0, the absorbency of the resin is 264 ml&middotg-1 and 1200 ml&middotg-1 respectively for normal saline and distilled water, and the ultimate degree of absorption in deionized water will be approached within 15 min. It was found by thermal analysis that raising the link density would improve the water preservation of the resin.

关 键 词：吸水树脂 反相悬浮共聚 丙烯酸 2-丙烯酰胺-2-甲基丙烷磺酸 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]