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本实验提供了一种新的PVA/PAAS/EDTA高吸水性树脂及其制备方法。采用聚乙烯醇(Poly vinyl alcohol,PVA)、聚丙烯酸钠(Poly acrylate sodium,PAAS)和乙二胺四乙酸(Ethylene diamine tetraacetic acid,EDTA),将由这些材料组成的水溶液经电子束辐射交联合成共聚物凝胶,经浸洗液溶胀和洗涤,萃冻和冷冻干燥后处理,制备出耐盐性高吸水性树脂。采用正交设计原理选出最佳配比,用不同配比的洗涤液进行后处理,研究洗涤液对树脂吸液性能的影响。测试树脂的各项性能,与国内外著名产品进行比较。结果表明,本实验制备出的高吸水性树脂具有优良的吸液速率和离心保液量,去离子水吸液倍率((821.05±1.61)g·g-1)和生理盐水吸液倍率((72.57±3.01)g·g-1)则非常显著地优于国内外著名高吸水性树脂产品(P±0.01)。
The experiment provides a new PVA / PAAS / EDTA superabsorbent resin and its preparation method. Polyvinyl alcohol (PVA), sodium polyacrylate (PAAS) and ethylene diamine tetraacetic acid (EDTA) were used to synthesize an aqueous solution composed of these materials by electron beam radiation Copolymer gel, the swelling and washing solution after immersion, extraction and freeze-dried and dried to prepare a salt-tolerant superabsorbent resin. The orthogonal design principle is used to select the best proportion, and the cleaning solution with different proportions is used for post-treatment to study the influence of the washing liquid on the liquid absorption performance of the resin. Test the performance of resin, with domestic and foreign famous products for comparison. The results showed that the superabsorbent resin prepared in this experiment has excellent liquid absorption rate and centrifuge retention capacity, the deionized water absorption rate ((821.05 ± 1.61) g · g -1) and physiological saline aspiration rate (( 72.57 ± 3.01) g · g-1) was significantly better than that of the famous superabsorbent resin products at home and abroad (P ± 0.01).