耐盐型聚丙烯酸钠高吸水树脂的合成研究

Synthesis and Characterization of Salt-Resistant Superabsorbent Resin

以过硫酸铵(APS)为引发剂,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,采用反相悬浮乳液聚合法合成了丙烯酸(AA)-丙烯酰胺(AM)-2-丙烯酰胺基辛烷基磺酸钠(NaAMC8S)三元共聚高吸水树脂,研究了引发剂含量、交联剂含量、AA中和度对树脂吸液性能的影响。结果表明:磺酸基单体NaAMC8S的加入显著提高了吸水树脂的盐水吸收能力,当引发剂含量为0.2%,交联剂含量为0.02%,中和度为75%,加入NaAMC8S为0.5%时,共聚树脂吸自来水的量为601mL/g,吸0.9%Nacl水溶液的量为154mL/g。

Superabsorbent resin-acrylic acid（AA）-ran-acrylamide（AM）-ran-sodium 2-acrylamido- octyl sulfonate copolymer was synthesized via inverse suspension emulsion polymerization by using acrylic acid （AA）, acrylamide （AM） and sodium 2-acrylamido-octyl sulfonate （NaAMCsS） as the monomers, ammonium persulfate （APS） as the initiator and N,N＇ -methylene-bis-acrylamide as the cross-linking agent. The effects of crosslinking agent concentration,initiator concentration and neutralization degree on the absorbency of water and salt solution as well as on the rate of absorption were investigated. Results showed that significant improvement of the salt-resistent property has been obtained. When the contents of initiator and cross-linking agent were 0.2（AA and AM monomer weight）% and 0.02（AA and AM monomer weiglat）%, the content of NaAMCsS was 0.5 （AA and AM monomer weight）%, and the degree of neutralization was 75%, the absorption amount of tap water and 0.9% NaC1 solution was 601 mL/g and 154mL/g, respectively.