Synthesis and Properties of Amphoteric Superabsorbent Polymer Modified by Wheat Straw Cellulose

摘要

Superabsorbent polymers (SAPs) were made from wheat straw cellulose (WSC), acrylic acid (AA), acrylamide (AM), and [2-(methylacryloyloxy)ethyl]trimethylammonium chloride (MAETAC) through graft copolymerization. The factors affecting the water-absorbent capacity of SAPs, such as monomers ratio, WSC dosage, content of initiator and crosslinking agent, and neutralization degree of AA, were investigated and discussed in detail. Amphoteric SAPs, with the absorbent capacity of 853 times their own weight in distilled water and 118 times in 0.9% salt solution under optimized synthesis condition, were obtained.