| 谭文渊,陈雨琴,苏瑞,黄康慧,王竹青.化学通报,2020,83(2):156-160. |
| PVDF亲水复合膜的制备及表征 |
| Preparation and Characterization of PVDF Hydrophilic Composite Membrane |
| 投稿时间：2019-08-14 修订日期：2019-11-02 |
| DOI： |
| 中文关键词: PVDF膜 PVA 共混 亲水性 改性 |
| 英文关键词:PVDF membrane PVA Blending Hydrophilicity Modification |
| 基金项目:国家公安部重点项目（2017JSYJA14）、四川理工学院人才引进项目（2016RCL40）和四川理工学院研究生创新基金项目（y2018058）资助 |
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| 中文摘要: |
| 聚偏氟乙烯（PVDF）膜材料存在强疏水性的缺陷，亲水化改性是解决该问题的主要途径。以PVDF为基膜材料、聚乙烯醇（PVA）为共混材料、N，N-二甲基乙酰胺（DMAc）为溶剂，采用相转化法制备PVDF/PVA复合膜。考察了复合膜的PVDF/PVA共混比、固含量、低分子化合物添加剂、聚合物添加剂等非溶剂添加剂对复合膜接触角的影响。结果表明，当PVDF/PVA共混比为7/3，固含量为13%时，制备的复合膜接触角为22.92°；当添加剂为无水氯化锂、纳米二氧化硅、聚乙烯吡咯烷酮（PVP）时，复合膜接触角分别从53.12°、30.51°和41.89°都降低到了0°，亲水性提高，其中纳米二氧化硅作为添加剂时复合膜亲水性最好；当添加剂为丙三醇、PMMA、PEG时，复合膜接触角都增大，亲水性变差。 |
| 英文摘要: |
| The strong hydrophobicity of polyvinylidene fluoride (PVDF) membrane materials is its main drawback, and hydrophilization modification is the main way to solve this problem. The PVDF/PVA composite membrane was prepared by phase inversion method using PVDF as the base material, polyvinyl alcohol (PVA) as the blending material and N,N-dimethylacetamide (DMAc) as the solvent. The effects of blending ratio of PVDF/PVA, solid content, small molecule additives and polymer additives on the contact angle of the composite film were investigated. The results showed that when the PVDF/PVA blending ratio is 7/3 and the solid content is 13%, the contact angle of the prepared composite membrane is 22.92°; when the additive is anhydrous lithium chloride, nano-silica, and PVP, the contact angle of the composite film is reduced from 53.12°, 30.51° and 41.89° to 0°, respectively. The composite film has the best hydrophilicity when nano-silica is used as an additive. When the additive is glycerin, PMMA, PEG, the contact angle of the composite film increases, and the hydrophilicity deteriorates. |
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