| 引用本文: | 钟溢健,张金娜,王秀蘅,任南琪.聚乙烯醇修饰准对称无机膜的正向渗透效能[J].哈尔滨工业大学学报,2015,47(8):7.DOI:10.11918/j.issn.0367-6234.2015.08.002 |
| ZHONG Yijian,ZHANG Jinna,WANG Xiuheng,REN Nanqi.Polyvinyl alcohol modified quasi-symmetric thin film inorganic membrane for enhanced forward osmosis performance[J].Journal of Harbin Institute of Technology,2015,47(8):7.DOI:10.11918/j.issn.0367-6234.2015.08.002 |
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| 摘要: |
| 为进一步提高准对称结构无机薄膜(QSTFI膜)的正向渗透（forward osmosis,FO）效能,利用聚乙烯醇（PVA）对其进行亲水性修饰,研究了不同PVA质量分数对膜的水通量及比盐通量的影响.膜表征结果表明：经过PVA修饰的膜表面负电荷增多,有利于膜对Na+的截留；此外修饰膜表面的亲水性提高有利于获得更高的水通量.通过FO实验确定PVA最佳质量分数为0.5 %.当提取液(DS)为2.0 molL-1 NaCl、原液（FS）为去离子水时,修饰膜水通量为67.08 Lm-2h-1,比同条件下QSTFI膜水通量高12%；而比盐通量为0.15 gL-1,比QSTFI膜低16.7%. |
| 关键词: 正向渗透膜 聚乙烯醇修饰 亲水性 水通量 盐通量 |
| DOI：10.11918/j.issn.0367-6234.2015.08.002 |
| 分类号:TQ 028.3 |
| 基金项目:国家自然科学基金(51378143；51208142);城市水资源与水环境国家重点实验室(哈尔滨工业大学)自主课题(2014DX06)；黑龙江省自然科学基金面上项目(E201154). |
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| Polyvinyl alcohol modified quasi-symmetric thin film inorganic membrane for enhanced forward osmosis performance |
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ZHONG Yijian, ZHANG Jinna, WANG Xiuheng, REN Nanqi
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(State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin, China)
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| Abstract: |
| To further promote the FO performance of QSTFI membrane, polyvinyl alcohol (PVA) modified QSTFI membrane (PVA-QSTFI) has been developed. The characterization results indicated that the incorporation of a small amount of PVA onto the QSTFI membrane has significant influence on the surface hydrophilicity, pore structure, surface charge and thus FO performance. An optimum PVA loading rate of 0.5% was chosen based on the water flux and specific salt flux experiments. Using the 2.0 molL-1 NaCl as DS, deionized water as FS, the modified membrane offered a 67.08 Lm-2h-1 water flux at 25 ℃, was 12% higher than that of QSTFI membrane. Meanwhile, a specific salt flux of 0.15 gL-1 was obtained, which is 16.7% lower than QSTFI membrane. |
| Key words: forward osmosis membrane PVA modification hydrophilicity water flux salt flux |
