天津工业大学学报2026，Vol.45Issue(4)：9-19,11.DOI:10.3969/j.issn.1671-024x.2026.04.002
PVP调控PSE基正渗透复合膜的制备及其性能
Fabrication and properties of PVP-modified PSE forward-osmosis composite membranes
摘要
Abstract
To elucidate how the molecular weight and dosage of polyvinylpyrrolidone(PVP),an aqueous-phase additive,regulate the formation of the poly(piperazine-amide)(PPA)selective layer and the forward-osmosis(FO)performance,PPA/S-PES/PSE thin-film composite FO membranes were fabricated via interfacial polymerization(IP).An S-PES/PSE ultrafiltration membrane was employed as the support substrate,with piperazine(PIP)and trimesoyl chloride(TMC)serving as the aqueous-and organic-phase monomers,respectively.The effects of PVP molecular weight(K15,K30,and K90)and the mass fraction of PVP K30 on aqueous-phase viscosity,PIP diffusion behavior,membrane morphology,surface roughness,wettability,the crosslinking degree of the PPA layer,and FO performance were systematically investigated.The results demonstrated that PVP increased the viscosity of the aqueous phase and reduced the diffusion rate of PIP into the organic phase,thereby regulating the interfacial polymerization reaction and the microstructure of the PPA layer.At a fixed PVP dosage,the water flux of PPA/S-PES/PSE thin-film composite FO membranes increased with increasing PVP molecular weight,whereas salt selectivity exhibited a non-monotonic variation.When the mass fraction of PVP(K30)was 0.5%,the composite membrane achieved a favorable balance between water permeability and salt selectivity,delivering a water flux of 12.8 L/(m2·h)and a reverse salt flux as low as 0.459 268 mg/(m2·h).关键词
PPA/S-PES/PSE复合型正渗透膜/界面聚合/正渗透膜工艺/聚乙烯吡咯烷酮/聚酰胺层改性Key words
PPA/S-PES/PSE composite FO membrane/interfacial polymerization/FO membrane process/polyvinyl pyrroli-done/polyamide layer modulation分类
化学化工引用本文复制引用
张煦显,李承凯,李佩佩,王薇,许白羽,周林超..PVP调控PSE基正渗透复合膜的制备及其性能[J].天津工业大学学报,2026,45(4):9-19,11.基金项目
新疆自治区"两区"院士专项(2022LQ02002) （2022LQ02002）
乌鲁木齐市科技计划项目(B231017012) （B231017012）
