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- 2019
海藻酸钙/聚丙烯无纺布复合过滤膜的制备及性能
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Abstract:
以聚丙烯（PP）无纺布为载体，不添加致孔剂制备了海藻酸钙/PP无纺布（CaAlg/PP）水凝胶复合过滤膜。通过SEM、TG对CaAlg/PP复合膜的表面形貌、热稳定性能进行表征。研究了CaAlg/PP复合膜的抗溶胀性能及其对染料吸附和染料截留的性能。结果表明，CaAlg/PP复合膜的抗溶胀性能比CaAlg水凝胶膜有很大提高。在0.1 MPa压力下，NaCl浓度为1 g·L-1时，料液通量为9.5 L（m2·h）-1，对亮蓝的截留率达到98.3%。CaAlg/PP复合膜的耐压性能远优于CaAlg膜，经过Ca2+交联后可以多次重复使用。CaAlg/PP复合膜对阴离子染料的吸附量很小，避免了染料的吸附污染。CaAlg/PP复合膜可应用于染料中低浓度盐的脱除。 Polypropylene non-woven supported calcium alginate (CaAlg/PP) hydrogel composite filtration membranes were fabricated without porogen. The morphology, structure and thermal stability of the CaAlg/PP membranes were characterized by SEM and TG. The antiswelling property, dyes adsorption and dyes rejection properties of the CaAlg/PP membranes were researched. The results show that the antiswelling properties of CaAlg/PP membrane are greatly improved compared with free-standing CaAlg hydrogel filtration membrane. When the concentration of sodium chloride is 1 g·L-1, the flux of the CaAlg/PP membrane reaches 9.5 L(m2·h)-1 under 0.1 MPa and the rejection of brilliant blue is 98.3%. The pressure resistant performance of CaAlg/PP membrane is far better than CaAlg filtration membrane and can be reused multiple times after Ca2+ cross-linking. The adsorption rate of anionic dyes is low, reducing the CaAlg/PP membrane fouling. The CaAlg/PP membrane can be used in dye desalination with a low salt concentration. 国家自然科学基金（21304037；51708407；21476172）；天津市应用基础与前沿技术研究计划项目（16 JCZDJC37500）；大学生创新创业训练计划（201710058020；201710058069）；天津市科技支撑计划重点项目（15ZCZDSF00880
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