膜科学与技术

ATR-FTIR和XPS技术用于聚酰胺膜表面组成研究

作者：谭惠芬，李俊俊，岳鑫业，王铭，潘巧明

单位：杭州水处理技术研究开发中心有限公司，杭州310012

关键词：聚酰胺；纳滤；反渗透；ATR-FTIR；XPS

出版年,卷(期):页码： 2015,35(6):22-27

摘要：

全反射红外光谱（ATR-FTIR）和X射线光电子能谱（XPS）技术相结合是用于表征聚合物材料基团组成及表面元素分析的高效手段。本实验将ATR-FTIR和XPS技术用于测试四款聚酰胺纳滤和反渗透商品膜的表面组成。通过ATR-FTIR方法，可知纳滤膜HL 4040 FM与其他反渗透膜相比，缺少酰胺Ⅱ键特征峰，由聚哌嗪酰胺组成；从峰强度推测纳滤膜的聚酰胺层厚度远小于反渗透膜。XPS元素分析显示几款膜内除聚酰胺外，还存在钠或硫元素，产生于作为保护液的盐类或合成时的添加剂。另外通过O/N比值和C 1s窄谱分峰分析，认为所研究的商品膜表面可能存在高氧含量保护涂层。

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.

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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