摘要
为了探讨氯化处理对高交联聚酰胺材料反渗透膜的影响,采用傅里叶变换红外吸收光谱分析、X射线光电子能谱以及SEM电镜扫描对氯化高交联芳香聚酰胺膜进行光谱分析。结果表明,1 690 cm-1和1 540 cm-1处有吸收,分别为酰胺吸收带I和酰胺吸收带II特征峰,经活性氯处理后,交联芳香聚酰胺在1 690 cm-1和1 540 cm-1处的吸收峰减小;同时在760 cm-1处出现C-Cl吸收峰。经pH=6.8、36 h活性氯化处理后,反渗透膜皮层外表面出现了塌陷的孔洞,内表面出现了较大的孔洞,孔洞直径约为800 nm左右;随着氯化处理强度的增大,孔洞直径增大。经150 h活性氯处理后,皮层内表面孔洞直径增至1 500 nm左右,复合膜分离层出现了明显的皮层与支撑层脱落的现象。
In order to understand the degradation mechanism of the chlorination on high cross-linking polyamide reverse osmosis membrane materials, Fourier transform infrared absorption spectrometry, X-ray photoelectron spectroscopy and SEM scanning were used to spectral analyse the Chlorinated high cross-linking aramid membrane. The results showed that 1 690 cm-1 and 1 540 cm-1 place had the absorption peaks, respectively with acid amides absorption characteristic peak I and II, and the absorption peaks decreased accompanying chlorination, and C--Cl absorption peaks appeared in 760 cm-1 place at the same time. After 36 hours chlorination activity at the pH 6.8, outside surface of reverse osmosis membrane cortex appeared collapse of the holes, pore diameter was about 800 nm. The inside surface of reverse osmosis membrane cortex had the bigger hole, hole diameter was about 666 nm; and after 150 hours of chlorination treatment, the inside surface of reverse osmosis membrane cortex had the bigger hole ,which the diameter was about 1 500 nm, meanwhile the phenomenon of layer falling was noticed.
出处
《水处理技术》
CAS
CSCD
北大核心
2012年第3期50-54,63,共6页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大水专项(2008ZX07208-002-06)
关键词
反渗透
聚酰胺
氯化
光谱性质
reverse osmosis
polyamide
chlorination
spectrum properties
