淀粉/膨润土复合高吸水树脂的制备工艺研究

Synthesis of super absorbent resin from starch/bentonite

以淀粉、膨润土、丙烯酸、丙烯酰胺等为原料,采用微波辐射法制备复合高吸水树脂。研究了膨润土用量、丙烯酰胺用量、引发剂用量、交联剂用量等对高吸水树脂吸液率性能的影响。实验结果表明,不同比例下的原材料制得的树脂吸水倍率差异很大。在交联剂为0.045%,引发剂0.32%,中和度70%,膨润土10%,磷酸酯淀粉3%,丙烯酸与丙烯酰胺质量比为2∶1,微波功率为800W辐射15min时吸蒸馏水倍率为796g/g,当丙烯酸与丙烯酰胺质量比为1∶1时,吸0.9%NaCl溶液倍率达95g/g。

The compound super absorbent resin was synthesized by starch,bentonite,acrylic acid and acrylamide,using microwave irradiation.Some key factors affecting the solution absorbency of the polymer such as the amount of bentonite,acrylamide,initiator and cross-linking agent have been discussed.The results showed that the optimal reaction conditions of cross-linking agent,initiator,neutralization degree,bentonite,phosphate starch were 0.045%,0.32%,70%,10%,3% when the weight ratio of acrylic acid and acrylamide was 2∶1,the microwave power was 800 W,the radiation time was 15 min.Under the conditions,the pure water absorption rate of super absorbent resin was up to 796g/g.when the weight ratio of acrylic acid and acrylamide was 1∶1,the absorption rate of 0.9% NaCl was 95g/g.