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以玉米淀粉为主要原料、丙烯酸(AA)为改性单体、过硫酸铵为引发剂和N,N-亚甲基双丙烯酰胺为交联剂,采用接枝共聚法制备淀粉接枝型高吸水性树脂。研究了糊化温度、糊化时间、引发剂和交联剂用量、单体浓度、接枝反应温度和反应时间等对树脂吸水性能的影响。确定其最佳工艺条件为:糊化温度为85℃、糊化时间为60min,w(引发剂)=3%(相对于淀粉而言)、w(交联剂)=0.8%(相对于淀粉而言)、AA单体浓度为4.5mol/L、反应温度为60℃和反应时间为4h。在最佳工艺条件下制备的树脂,其吸水性能最佳,吸水率达到730g/g。
Using corn starch as main raw material, acrylic acid (AA) as modified monomer, ammonium persulfate as initiator and N, N-methylenebisacrylamide as cross-linking agent, Water-absorbent resin. The effects of gelatinization temperature, gelatinization time, dosage of initiator and crosslinking agent, monomer concentration, graft reaction temperature and reaction time on water absorption of resin were studied. The optimal process conditions were as follows: gelatinization temperature 85 ℃, gelatinization time 60min, w (initiator) = 3% (with respect to starch), w (crosslinker) = 0.8% ), AA monomer concentration of 4.5mol / L, the reaction temperature was 60 ℃ and the reaction time was 4h. The resin prepared under the best process conditions, the best water absorption, water absorption rate of 730g / g.