聚乙二醇-聚己内酯嵌段共聚物对聚酰胺膜结构及性能的影响
作者:胡利杰 梁松苗,姚艳
单位: 时代沃顿科技有限公司,贵州 贵阳,550018
关键词: 呼吸图法;界面聚合;嵌段共聚物;蜂窝状结构;耐溶剂
分类号: TQ028.8
出版年,卷(期):页码: 2021,41(3):68-76

摘要:
 采用呼吸图法和界面聚合相结合的方法,利用两亲性聚乙二醇-聚己内酯嵌段共聚物(PEG-b-PCL)调控胺单体在界面聚合过程中的扩散速率制备聚酰胺膜,并研究了嵌段共聚物PEG-b-PCL对聚酰胺(PA)膜结构及性能的影响。结果表明,PEG-b-PCL能够明显提高胺单体的扩散速率,所制备的PA膜呈有序“蜂窝”状,结构高度规整化,膜厚60nm,孔径1.2μm。PA膜在丙酮溶液中的截留分离量为373g/mol,并保持较高的通量,有机溶剂中的溶胀度为7%左右,具有良好的耐溶剂性,在25bar高压下连续运行48h,渗透系数维持在3.7L/m2·h·bar,染料截留率保持稳定,耐压性能优异。
 Polyamide(PA)membranes were prepared by regulating diffusion rate of amine monomer with the method of the breathing pattern method and the interfacial polymerization. Moreover, the effect of PEG-b-PCL on membranes structure and performance was studied. The results showed that PA membranes with ordered honeycomb structure were prepared by changing the diffusion rate of amine during the interfacial polymerization. The thickness and pore size of PA membranes are about 60 nm and 1.2 μm, respectively. Furthermore, Molecular Weight Cut Off (MWCO) of PA membranes is 373 g/mol and the swelling degree of membranes is about 7%, in  addition, the permeability coefficient is kept 3.7 L/m2·h·bar when operation time and operation pressure of membranes was 48h and 25bar, respectively. In a word, PA membranes have showed well organic-resistant and pressure- resistant properties.

基金项目:
国家重点研发计划项目(2017YFC0403900);国家重点研发计划项目(2016YFE0118800)

作者简介:
胡利杰(1985- )女,河南新乡人,高级工程师,主要从事水处理膜材料的研究与产业化

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