膜科学与技术

海泡石改性聚醚砜膜的制备及性能研究

作者：秦爱文，杨炎福，何云龙，何功曼，廖菁，辛长征

单位：河南工程学院，郑州 450007

关键词：聚醚砜；海泡石；共混膜；抗污改性

出版年,卷(期):页码： 2020,40(5):70-76

摘要：

本文使用聚醚砜（Polyethersulfone，PES）作为制膜材料，N-N二甲基乙酰胺为溶剂，通过改变海泡石的添加量得到系列PES/海泡石共混膜。实验通过水接触角测定仪、傅里叶红外光谱仪、电子织物强力仪等对膜的亲水性、化学组成、拉伸性能等进行测试与表征。随后，以牛血清蛋白作为模拟污染物，通过错流渗透的方式对膜的透水性、截留率和抗污性能进行测试表征。结果表明：随着改性海泡石添加量的增加，共混膜的断裂强度有所降低，断裂伸长率的变化不明显；当改性海泡石添加量为1.0 %时，接触角降为最小值61.74 °，而孔隙率和纯水通量分别到达了最大值88.64 %和221.3 L/(m2·h)。另外，对比空白膜，该共混膜的平均污染度和衰减系数分别从50 %和40 %降为24.11 %和15.68 %，表明添加改性海泡石后改善了PES膜的抗污性能。

A series of PES/Sepiolite hybrid membranes were obtained by changing the amount of sepiolite, using polyethersulfone (PES) as the membrane material, and N-N dimethylacetamide as the solvent. In the experiment, the hydrophilicity, chemical composition and tensile properties of the membrane were tested and characterized by water contact angle measuring instrument, Fourier infrared spectrometer and electronic fabric strength machine. Subsequently, water permeability, retention rate and antifouling performance of the membrane were tested and characterized by cross-flow penetration using bovine serum albumin as a simulated contaminant. The results show that breaking strength of the hybrid membrane is reduced, and the change of breaking elongation is not obvious with the increase of the amount of modified sepiolite. When the amount of modified sepiolite was 1%, contact angle decreased to a minimum of 61.74 °, while the porosity and pure water flux reached maximum values of 88.64 % and 221.3 L/(m2 h), respectively. In addition, average pollution degree and attenuation coefficient of the hybrid membrane were reduced from 50 % and 40 % to 24.11 % and 15.68 % compared with the blank membrane, indicating that the PES membrane after adding modified sepiolite has better antifouling performance.

秦爱文（1986-），男，河南郑州，讲师，研究生，博士，膜材料制备和改性，E-mail：qinaiwen@haue.edu.cn，

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