微波辐射二元共聚高吸水树脂的合成及性能

Synthesis and Properties of Superabsorbent Resin of Binary Copolymer by Microwave

采用微波辐射方法制备了2-丙烯酰胺基-2-甲基丙磺酸(AMPS)/丙烯酰胺(AM)高吸水树脂,并用红外光谱进行了表征。探讨了单体配比、交联剂用量、引发剂用量、中和度、反应时间和微波功率对合成高吸水性树脂的影响,对树脂吸水速率进行了研究。结果表明,最佳条件下制备的高吸水性树脂吸蒸馏水倍率达1 495 g/g、吸生理盐水倍率为93 g/g;树脂的吸水倍率随电解质溶液浓度的增加显著下降,对不同阴离子的钾盐溶液而言,按阴离子半径从大到小的顺序依次降低;树脂的吸水倍率与阳离子的价态有关,价态越大,吸水倍率越低。

Poly（2-acrylamido-2-methylpropa-nesulfonic acid/acrylamide） superabsorbent resin was synthesized by microwave irradiation and characterized by means of FTIR.The impact factors of synthesizing superabsorbent resin,such as the ratio of monomer,the amount of crosslinker,the amount of initiator,neutralization degree,reaction time,microwave power,and the absorption properties of liquid absorbency rate were discussed.Meanwhile,the water absorption rate of resin was investigated.The results showed that the water absorption rate of resin was 1 495 g/g in distilled water and 93 g/g in normal saline respectively under the optimum conditions.However,the absorbency was decreased sharply with the increase of salt concentration in solution,and with the radius decrease of anion coupled with potassium ion in the case that the same concentration of salts in solution.Moreover,the water absorption rate had something to do with the valence of cation for the electrolyte solution,the higher the valence,the lower the water absorption rate.