化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (12) : 198-204. DOI: 10.19817/j.cnki.issn1006-3536.2025.12.044

科学研究

聚(丙烯酰胺-co-丙烯酸)/硫酸钙复合水凝胶的制备与性能

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Preparation and properties of poly(acrylamide-co-acrylic acid)/calcium sulfate composite hydrogels

Zhang Yixiang¹, Qin Wang¹, Zhang Yuxuan¹, Cao Zheng¹, Liu Chunlin²

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Received		Published
2025-01-03		2025-12-20
Issue Date	Revised Date
2025-12-17	2025-01-03

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摘要

以丙烯酰胺(AM)与丙烯酸(AA)为聚合单体,工业副产盐石膏(CaSO₄-Na)与磷石膏(CaSO₄-P)颗粒为增强填料,在水相中通过自由基共聚法制备了水凝胶P(AM-co-AA)/CaSO₄-Na和P(AM-co-AA)/CaSO₄-P。对水凝胶进行一系列测试表征,分析水凝胶的化学组成与微观形貌以及力学、溶胀、热稳定性与吸附性能。结果表明:无机颗粒CaSO₄-Na与CaSO₄-P的加入均提高了水凝胶的力学性能与吸水溶胀性能,CaSO₄-Na用量为0.96%时,P(AM-co-AA)/CaSO₄-Na具有最高的压缩应力,为3.252MPa,同时,也具有最大的溶胀度,为2945.79%。与PAM和P(AM-co-AA)相比,P(AM-co-AA)/CaSO₄-Na和P(AM-co-AA)/CaSO₄-P对阳离子染料亚甲基蓝的吸附量得到提高,脱除率均达到96%～98%。根据动力学评估,亚甲基蓝的吸附过程可以很好地用准二级动力学模型来描述,表明其具有单层化学吸附机理。在染料废水处理中具有应用潜力。

Abstract

P(AM-co-AA)/CaSO₄-Na and P(AM-co-AA)/CaSO₄-P hydrogels were prepared by free radical copolymerization in aqueous phase with acrylamide (AM) and acrylic acid (AA) as polymerization monomers and industrial by-product salt gypsum (CaSO₄-Na) and phosphogypsum (CaSO₄-P) particles as reinforcement fillers.The hydrogels were characterized by a series of tests,and their chemical composition,microscopic morphology,mechanics,swelling,thermal stability and adsorption properties were analyzed.The results showed that the addition of inorganic particles CaSO₄-Na and CaSO₄-P improved the mechanical properties and water absorption swelling properties of the hydrogels.When the content of CaSO₄-Na was 0.96%,P(AM-co-AA)/CaSO₄-Na exhibited the highest compressive stress,reaching 3.252MPa,and the highest swelling degree,reaching 2945.79%.Compared with PAM and P(AM-co-AA),the adsorption capacity of cationic dye methylene blue by P(AM-co-AA)/CaSO₄-Na and P(AM-co-AA)/CaSO₄-P was improved,and the removal rate reached 96% to 98%.According to the kinetic evaluation,the adsorption process of methylene blue could be well described using a pseudo-second-order kinetic model,indicating its single-layer chemical adsorption mechanism.These findings highlight the potential application of these composite hydrogels in dye wastewater treatment.

关键词

丙烯酰胺 / 丙烯酸 / 硫酸钙 / 亚甲基蓝 / 吸附量

Key words

acrylamide / acrylic acid / calcium sulfate / methylene blue / adsorption capacity

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聚(丙烯酰胺-co-丙烯酸)/硫酸钙复合水凝胶的制备与性能[J]. 化工新型材料, 2025, 53(12): 198-204 DOI:10.19817/j.cnki.issn1006-3536.2025.12.044

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