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通过自吸水性化合物甘油与淀粉接枝丙烯酸或丙烯酰胺相结合,制备了两种可以从空气中吸收水分的自吸水性超强吸水剂,并对其吸水性能进行了研究。结果表明:树脂的合成条件对吸水率有很大影响,反应3h,温度70℃,引发剂浓度6×10-4mol/L,甘油的质量分数为40%时,制得的自吸水性超强吸水剂吸水能力最强;甘油-淀粉-丙烯酰胺体系的自吸水能力优于甘油-淀粉-丙烯酸体系的自吸水能力;泥土与超强吸水剂混合后可以自动从空气中吸收水分,与甘油-淀粉-丙烯酰胺混合的土壤,放置20d后其自吸水率可达14.8%。
Two kinds of superabsorbent superabsorbent that can absorb water from the air were prepared by combining the self-absorbed water-based compound glycerin with starch-grafted acrylic acid or acrylamide, and its water-absorbing property was studied. The results showed that the synthesis conditions of the resin had a great influence on the water absorption rate. When the reaction time was 3h, the temperature was 70 ℃, the initiator concentration was 6 × 10-4mol / L and the mass fraction of glycerol was 40% Water absorption capacity of water absorbent is the strongest; glycerine - starch - acrylamide system self-absorption capacity is better than glycerol - starch - acrylic system self-absorption capacity; soil and super absorbent can automatically absorb moisture from the air, and glycerol - Starch - acrylamide mixed soil, placed 20d after the self-water absorption rate of up to 14.8%.