[1]徐旭峰,郑利祥,郑彭生,等.聚乙二醇对聚氯乙烯超滤膜微观结构和性能的影响[J].中国给水排水,2025,41(1):64-70.
　XUXu-feng,ZHENGLi-xiang,ZHENGPeng-sheng,et al.Effect of Polyethylene Glycol on Microstructure and Properties of Polyvinyl Chloride Ultrafiltration Membrane[J].China Water & Wastewater,2025,41(1):64-70.
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聚乙二醇对聚氯乙烯超滤膜微观结构和性能的影响

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第1期 页码: 64-70 栏目: 出版日期: 2025-01-01
Title:
Effect of Polyethylene Glycol on Microstructure and Properties of Polyvinyl Chloride Ultrafiltration Membrane
作者:
徐旭峰， 郑利祥， 郑彭生， 徐细波， 张军， 杨久利， 郭中权
（中国煤炭科工集团杭州研究院有限公司，浙江 杭州 311201）
Author(s):
XU　Xu-feng， ZHENG　Li-xiang， ZHENG　Peng-sheng， XU　Xi-bo， ZHANG　Jun， YANG　Jiu-li， GUO　Zhong-quan
（Hangzhou Research Institute of China Coal Technology & Engineering Group， Hangzhou 311201， China）
关键词:
聚氯乙烯超滤膜;  聚乙二醇;  相容性;  孔隙结构;  抗污染性
Keywords:
polyvinyl chloride ultrafiltration membrane;  polyethylene glycol;  compatibility;  pore structure;  anti?fouling
摘要:
采用分子质量为8 ku的聚乙二醇（PEG）作为添加剂和制孔剂，通过相转化法制备了聚氯乙烯（PVC）超滤膜。通过铸膜液黏度、膜表面元素组成、膜的微观形貌、膜表面接触角和膜渗透截留分析，研究了PEG对PVC超滤膜结构和性能的影响。结果表明，PVC和PEG是部分相容体系，PEG的添加使得PVC超滤膜表面孔隙变得均一，增加了膜表面的亲水性和膜内部的纳米级微孔，改变了超滤膜内部指状孔道的结构，有利于水流的渗透；而过少的PVC和过量的PEG会导致功能层塌陷，增加水流传质阻力。当聚合物的质量分数为19%、PVC与PEG的质量比为17∶2时，超滤膜的纯水通量可达到4.16 L/（m2·h·kPa），对牛血清白蛋白（BSA）的截留率为96%，循环处理腐殖酸溶液并用纯水清洗后，膜通量恢复率为80.3%；水厂中试应用结果表明，超滤膜可将出水浊度降至0.1 NTU以下，并能去除100%的大肠杆菌。
Abstract:
Polyvinyl chloride (PVC) ultrafiltration membrane was prepared through phase inversion method, with polyethylene glycol (PEG) of molecular weight 8 ku serving as the additive and pore-forming agent. The influence of PEG on the structure and performance of PVC ultrafiltration membrane was investigated through the analysis of the viscosity of the casting solution, element composition of membrane surface, membrane microscopic morphology, contact angle of membrane surface, and membrane penetration interception. PVC and PEG were partially compatible system. The addition of PEG resulted in the uniformity of the surface pores of PVC ultrafiltration membrane, enhanced the hydrophilicity of the membrane surface and the nanoscale micropores within the membrane, altered the structure of the finger-like pores inside the ultrafiltration membrane, and was beneficial for water flow penetration. However, insufficient PVC and excessive PEG would lead to the collapse of the functional layer, thereby increasing the mass transfer resistance of water flow. When the mass fraction of the polymer amounted to 19% and the mass ratio of PVC to PEG stood at 17∶2, the pure water flux of the ultrafiltration membrane could reach 4.16 L/(m2·h·kPa), and the rejection of bovine serum albumin (BSA) was 96%. After the cyclic treatment of the humic acid solution and cleaning with pure water, the membrane flux recovery rate was 80.3%. The pilot application outcomes demonstrated that the ultrafiltration membrane could lower the turbidity of the effluent to less than 0.1 NTU and could eliminate 100% of E. coli.
更新日期/Last Update: 2025-01-01