Effect of free volume and formation mechanisms of polyamide layers on nanofiltration membrane

被引：28

作者：

Hung, Wei-Song ^{[1
]}

Liang, Jui-Han ^{[1
]}

Lecaros, Rumwald Leo G. ^{[1
]}

An, Quan-Fu ^{[2
]}

Hu, Chien-Chieh ^{[1
]}

Lee, Kueir-Rarn ^{[1
]}

Lai, Juin-Yih ^{[1
,3
]}

机构：

[1] Chung Yuan Christian Univ, Dept Chem Engn, R&D Ctr Membrane Technol, Chungli 32023, Taiwan

[2] Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China

[3] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 10607, Taiwan

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2017年 / 187卷

关键词：

Nanofiltration; Free volume; Polyamide; Formation mechanisms; Interfacial polymerization; POSITRON-ANNIHILATION SPECTROSCOPY; FILM COMPOSITE MEMBRANES; REVERSE-OSMOSIS MEMBRANES; PHASE-INVERSION MEMBRANES; ATOMIC-FORCE MICROSCOPY; INTERFACIAL POLYMERIZATION; PHYSIOCHEMICAL PROPERTIES; PERFORMANCE CORRELATION; COATING LAYER; POLYMERS;

D O I：

10.1016/j.seppur.2017.06.013

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Amine monomers of different chemical structures and multiple reactive functional groups, namely tris(2-aminoethyl)amine (TAEA), triethylenetetramine (TETA), and 1,3-diaminopropane (DAP) was reacted with acyl chloride monomers such as 1,3,5-benzenetricarbonyl chloride (TMC) and suberoyl chloride (SC) to synthesize polyamide thin film composite membranes through interfacial polymerization. The effect of membrane formation mechanisms on nanofiltration was investigated, A variable monoenergy slow positron beam was used to explore the differences in the free volume diameters of polyamide layers composed of different chemical structure. The results revealed that the polymerization degree, free volume diameter, and selective layer thickness of the polyamide layers were strongly correlated with each other. Specifically, a high polymerization degree induced a small free volume diameter and a thin selective layer. The cross-linked TAEA-TMC polyamide layer exhibited a free volume diameter of 3.9 A and was the thinnest (168 nm) among the synthesized membranes, whereas the linear DAP-SC polyamide layer was the thickest (873 nm) with a free volume diameter of 4.7 A. Finally, a stability test on the TAEA-TMC/PAN showed a slight fluctuation during the 36 h filtration, salt rejection maintained stability at around 97% and water flux of 22.3 L m(-2) h(-1). (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：443 / 452

页数：10

共 59 条

[1] Probing the hydrophobicity of commercial reverse osmosis membranes produced by interfacial polymerization using contact angle, XPS, FTIR, FE-SEM and AFM [J].