LS-g-PAMPS/AA高吸水性树脂的微波合成及吸水性能

摘要

以木质素磺酸钠（ LS-Na）、2-丙烯酰胺基-2-甲基丙磺酸（ AMPS）、丙烯酸（ AA）为原料，采用微波辐射法，通过接枝共聚合成LS-g-PAMPS/AA高吸水性树脂。探讨了微波功率、辐射时间对树脂吸水倍率的影响，研究了树脂在各种pH溶液中的溶胀行为，探讨了树脂的吸水速率、保水和反复吸水性能。结果表明，引入适量的LS-Na可以显著提高树脂的吸水速率、保水和反复吸水性能。树脂具有pH敏感性，在pH值4~12之间保持较高的吸水倍率，在pH值2与7的溶液里有良好的可逆行为。%Novel sodium lignosulfonate graft 2-acrylamido-2-methylpropanesulfonic acid and acrylic acid ( LS-g-PAMPS/AA)superabsorbent resin was synthesized by grafting polymerization using microwave irra-diation. The effects of power and time on water absorbency of the superabsorbent resin were studied. The swelling behaviors of the superabsorbent resin in various pH solutions were studied. The swelling rate,wa-ter-retention and repeated water properties of superabsorbent resin. The results shows that the introduction of LS-Na into moderately the polymeric network can improve swelling rate,water-retention and repeated water properties of superabsorbent resin. The superabsorbent resin showed remarkable sensitivity and could maintain high water absorbency over a pH range of 4~12 to external pH solutions,and superabsor-bent resin showed reversible On-Off switching swelling characteristic.