海水淡化反渗透商品膜耐酸碱性研究

发布时间：2018-02-26 04:39

  本文关键词： 海水淡化反渗透膜 反渗透 耐酸性 耐碱性　出处：《水处理技术》2016年07期 　论文类型：期刊论文

【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。
[Abstract]:Two reverse osmosis commercial membranes, SWC5 and SWC6, were treated with pH 1 and 13 acid and alkali solutions. The results of IR show that the characteristic peaks of aromatic amides on the surface of SWC5 and SWC6 treated by acid-base treatment are reduced to some extent compared with the original membrane. Elemental analysis showed that -COOH or -COO- after partial hydrolysis of amide-bond in acid-base treated membrane resulted in an increase in oxygen content. The surface roughness of SWC5 membrane may be the most affected by alkaline hydrolysis. SWC5 acid-base treatment increases the surface roughness, while the peak and valley structure of SWC6 acid-base treatment membrane surface tends to flatten. SWC6 membrane surface surface acid-base treatment water contact angle change is very small; However, the water contact angle decreased significantly after SWC5 alkali treatment. 2. The change of membrane retention was less than 1.0, but the change of water flux was different. On the whole, the acid-alkali resistance of SWC6 membrane was better than that of SWC5 membrane.
【作者单位】： 杭州水处理技术研究开发中心有限公司;
【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)
【分类号】：P747
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本文编号：1536577