耐水解高吸水树脂的合成与性能研究

Preparation and properties of anti-hydrolyzing super absorbent resin P(AMPS+AA)

采用2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酸(AA)、十二烷基苯磺酸钠(LAS)为主要原料,以二乙烯基苯(DVB)为交联剂制备出P(AMPS+AA)高吸水膨胀树脂,考察了AMPS与AA配比、中和度、交联剂种类与用量、LAS加量等合成工艺对吸水树脂性能的影响。研究结果表明,在丙烯酸系吸水树脂中引入AMPS结构单元,有利于提高树脂在盐水中的吸液能力,改善高吸水树脂的耐盐性;在以DVB为交联剂制备P(AMPS+AA)树脂时,LAS加量对树脂性能影响显著,当DVB用量为0.3%-0.45%、十二烷基苯磺酸钠用量0.15%-0.3%时,制备的P(AMPS+AA)树脂具有较高吸水能力,并且其稳定性比N,N’-亚甲基双丙烯酰胺(NMBA)交联的树脂优良,在高温碱性或酸性条件下显示出良好的耐水解性能。

The resin noted as P（AMPS＋AA） is synthesized by using 2-acrylamide-2-methylpropyl sulfonic acid（AMPS）,acrylic acid（AA）,sodium dodecyl benzene sulfonate（LAS） as raw materials,DVB and NMBA as crosslinkers.The effects of the mass ratios of AMPS/AA,neutralizationg,crosslinker type and its dosage,and LAS dosage were investigated.The results show that the AMPS unit introduced into the polyacrylate absorbent resin can improve the salt resistance.The LAS dosage exerts obvious effects on the property of the resin preparied by adopting DVB as crosslinker.The resin shows good water absorbency when the amount of DVB and LAS are 0.3-0.45% and 0.15-0.3%.The DVB cross-linked resin displays excellent hydrolytic stability under the alkaline/acid condition at high temperature,which is better than that of the NMBA cross-linked resin.