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将凹凸棒黏土分级处理后,以不同纯度的凹凸棒黏土为无机组分,过硫酸铵为引发剂,N,N’-亚甲基双丙烯酰胺为交联剂,制备了羧甲基纤维素接枝丙烯酸/凹凸棒黏土复合高吸水性树脂,考察了复合高吸水性树脂的吸水倍率、吸水速率和在不同pH介质中的溶胀性能。红外光谱表明,丙烯酸已接枝到羧甲基纤维素的骨架上,凹凸棒黏土参与了聚合反应。扫描电镜观察表明,凹凸棒黏土在高吸水性树脂中有良好的分散性能,改善了基体表面的多孔结构。研究表明,在相同添加量下,凹凸棒黏土中含有更多的Ca2+和Mg2+离子,有助于改善复合高吸水性树脂的综合性能。
After attapulgite clay was classified, carboxymethylcellulose was prepared by using attapulgite clay with different purity as inorganic component, ammonium persulfate as initiator and N, N’-methylenebisacrylamide as cross-linking agent Grafted acrylic / attapulgite clay composite superabsorbent resin, investigated the super absorbent polymer water absorption capacity, water absorption rate and swelling in different pH medium. Infrared spectroscopy showed that acrylic acid had been grafted onto the carboxymethyl cellulose skeleton, and attapulgite clay was involved in the polymerization reaction. Scanning electron microscopy showed that attapulgite clay had good dispersibility in superabsorbent and improved porous structure on the surface of matrix. The results show that attapulgite clay contains more Ca2 + and Mg2 + ions at the same dosage, which helps to improve the comprehensive properties of the composite superabsorbent.