海水淡化反渗透商品膜耐酸碱性研究  

Study on the Acid and Alkali Resistance of Commercial Seawater Desalination RO Membranes

作　　者：谭惠芬[1] 陈中海[1] 刘涛[1] 王铭[1] 潘巧明[1] 

机构地区：[1]杭州水处理技术研究开发中心有限公司,浙江杭州310012

出　　处：《水处理技术》2016年第7期70-74,共5页Technology of Water Treatment

基　　金：海洋公益性行业科研专项经费项目(201305039-3);国家科技支撑计划课题(2014BAB06B01-04);浙江省海水淡化技术研究重点实验室项目(2012E10001)

摘　　要：选用2款海水淡化反渗透商品膜SWC5和SWC6,进行p H为1和13的酸碱溶液处理,对处理后的膜组成、形貌结构和分离性能进行了分析测试。红外结果显示,SWC5和SWC6膜酸碱处理膜表面芳香酰胺特征峰与原膜相比有不同程度的减小,证明分离层酰胺键发生了不同程度的水解。元素分析表明,酸碱处理膜酰胺键部分水解后产生的-COOH或-COO-引起氧含量升高,其中SWC5膜可能受碱水解作用影响最大。SWC5酸碱处理后膜表面粗糙度升高,而SWC6酸碱处理膜表面峰谷结构更趋于平坦。SWC6膜表面酸碱处理后水接触角变化很小;而SWC5碱处理后水接触角显著下降。2款酸碱处理膜截留率的变化均小于1.0%,但水通量变化程度不同。总体上SWC6膜的耐酸碱性能优于SWC5膜。In this paper two commercial seawater （Re） membranes SWC5 and SWC6 were selected and treated with pH 1 and 13 acid and alkali liquor. The composition, surface morphology and separation property of the treated membranes were analyzed. Infrared spectra results shows the intensity of aromatic amide characteristic absorption bands of SWC5 and SWC6 decrease with different degrees, which prove the hydrolytic action of aromatic arnide. Elemental analysis shows the oxygen contents of treated membranes increase because of the -- COOH or -- COO- induced by amide hydrolysis. And SWC5 may be most affected by alkali. The surface roughness of treated SWC5 increases while the surface of treated SWC6 becomes more even than untreated membrane. The water contact angles of treated SWC6 change slightly than untreated one while the water contact angles of treated SWC5 decrease obviously. The retention rate changes of two treated membranes compared to untreated membranes are less than 1.0% while different degrees of water flux changes were found. Overall, the acid and alkali resistance of SWC6 are better than SWC5.

关 键 词：海水淡化反渗透膜 反渗透 耐酸性 耐碱性 

分 类 号：TQ028.8[化学工程] P747.7[天文地球—海洋科学]