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Study on the surface composition of polyamide membrane by ATR-FTIR and XPS

Authors： TAN Huifen, LI Junjun, YUE Xinye, WANG Ming, PAN Qiaoming*

Units： Hangzhou Water Treatment Technology Development Center, Hangzhou 310012, China

KeyWords： polyamide; nanofiltration; reverse osmosis; ATR-FTIR; XPS

ClassificationCode：TQ028. 8

year,volume(issue):pagination： 2015,35(6):22-27

Abstract：

In this study, ATR-FTIR and XPS, as the efficient techniques for the analysis of chemical compsotion, were adopted to characterize the surface compositions of four types of nanofiltration (NF) and reverse osmosis (RO) polyamide membranes. ATR-FTIR results show that HL 4040 FM nanofiltration membrane is lack of the characteristic absorption band of amideⅡcompared with the other RO membranes, indicating that the selective layer of membrane HL 4040 FM is composed of poly(piperazine amide). The relatively lower peak intensity of NF membrane compared with the RO membrane also suggests that the thickness of polyamide layer of NF membrane is thinner than that of RO membrane. XPS analysis shows The existence of Na and S on membrane surface demonstrated by XPS analysis are attributed to the salts from protective solution or additives for interfacial polymerization. O/N ratios and C 1s spectra also reveal that all the four commercial membranes tested have a protective layer with high oxygen content.

Funds：

基金项目：工信部新材料产业化专项项目；浙江省海水淡化技术研究重点实验室项目（2012E10001 ）；膜法海水淡化关键技术及装备产业化（ 20132111A01）

AuthorIntro：

第一作者简介：谭惠芬（1986-），女，浙江嘉兴市人，博士，工程师，电话：0571-88935437，Email: tanhf@chinawatertech.com

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