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在聚天冬氨酸(PAsp)吸水树脂制备过程中,分别以去离子水、甲醇、乙醇、正丁醇为分散剂加入到聚琥珀酰亚胺(PSI)溶液中使之成为均匀体系,在该体系中加入交联剂1,6-己二胺制备了具有三维网络结构的环保型高吸水树脂,并利用FTIR、SEM、TG等手段对其微观结构进行了测试。通过对比4种分散剂对PAsp吸水树脂吸液性能的影响,得出以下结论:不论是何种分散剂,适量的单独加入均可显著提高吸水树脂的吸液倍率,其中以去离子水为优,在蒸馏水和生理盐水中的吸液倍率分别达945 g/g和94 g/g;以正丁醇作分散剂可明显提高吸水树脂的吸液速率,吸液7 h即可达溶胀平衡;以m(去离子水)∶m(正丁醇)=7∶3的混合溶剂作为分散剂时,树脂的吸水性能较纯水与纯正丁醇要好,吸水6 h后即达吸液平衡,吸水倍率可达1 004 g/g;PAsp树脂的吸水性能随着干燥次数的增加而逐渐下降,干燥5次后树脂的吸水倍率仍能达到400 g/g,说明PAsp树脂具有较好的重复吸水性能。
In the preparation process of polyaspartic acid (PAsp) water absorbing resin, deionized water, methanol, ethanol and n-butanol were respectively added as dispersants to polysuccinimide (PSI) solution to make it a homogeneous system. In this system, a cross-linked 1,6-hexanediamine was used to prepare an environment-friendly superabsorbent polymer with three-dimensional network structure. The microstructure of the superabsorbent was tested by means of FTIR, SEM and TG. By comparing the four kinds of dispersant PAsp absorbent resin liquid absorption properties, the following conclusions: No matter what kind of dispersant, the right amount of separate addition can significantly improve the absorbent resin absorbency, in which deionized water is better , And the liquid absorption rates in distilled water and physiological saline were 945 g / g and 94 g / g, respectively. Using n-butanol as dispersant could obviously improve the liquid absorption rate of absorbent resin, When the mixed solvent of m (deionized water): m (n-butanol) = 7: 3 was used as the dispersant, the water absorption capacity of resin was better than that of pure water and pure butanol. The rate of up to 1 004 g / g; PAsp resin water absorption performance with the increase in the number of drying and gradually decreased after 5 times drying the resin water absorption capacity can reach 400 g / g, indicating that PAsp resin has good water repellency .