| 聚偏氟乙烯杂化微孔膜的疏水性研究 |
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| 引用本文： | 韩华,彭跃莲,刘晓娟.聚偏氟乙烯杂化微孔膜的疏水性研究[J].膜科学与技术,2009,29(4). |
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| 作者姓名： | 韩华 彭跃莲 刘晓娟 |
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| 作者单位： | 北京工业大学,环境与能源工程学院,北京,100022 |
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| 摘 要： | 采用改进的水蒸气(或称水雾蒸气)诱导成膜的方法制备强疏水性的聚偏氟乙烯(PVDF)微孔膜.在制膜液中添加了正硅酸乙酯(TEOS),水蒸气中添加了碱后,制备的PVDF/Si杂化微孔膜的疏水性更强,水接触角得到较大提高.实验初步考察了TEOS的浓度、环境相对湿度、蒸汽中凝胶时间和蒸汽中碱的浓度对膜表面接触角的影响.结果表明,在一定范围内,膜上表面的接触角随TEOS的浓度、相对湿度和蒸汽中凝胶时间的增加而增大.扫描电镜(SEM)和原子力显微镜(AFM)照片显示,改进的蒸汽诱导法形成的杂化膜上表面无致密皮层,呈网状多孔结构并附着微米级的球形颗粒,且蒸汽中适宜的碱浓度有利于球状颗粒的形成和长大;断面呈对称的海绵状结构.
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| 关 键 词： | 水蒸气诱导 聚偏氟乙烯(PVDF) 正硅酸乙酯(TEOS) 疏水性 水接触角 |
Research on the hydrophobicity of poly(vinylidene fluoride) hybrid microporous membrane |
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| HAN Hua,PENG Yuelian,LIU Xiaojuan.Research on the hydrophobicity of poly(vinylidene fluoride) hybrid microporous membrane[J].Membrane Science and Technology,2009,29(4). |
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| Authors: | HAN Hua PENG Yuelian LIU Xiaojuan |
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| Affiliation: | Center for Membrane Technology;College of Environment and Energy Engineering;Beijing University of Technology;Beijing 100022;China |
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| Abstract: | The modified method of water vapor induced membrane formation was introduced to prepare high hydrophobic poly(vinylidene fluoride)(PVDF) porous membrane in this paper.After adding tetraethyl orthosilicate(TEOS) into the PVDF casting solution and alkali into the water vapor,the hydrophobicity of PVDF/Si hybrid membrane was even better than that of pure PVDF porous membrane.The average water contact angle(CA) of top surface of the hybrid membrane was greatly improved.The effects of the TEOS concentration,rela... |
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| Keywords: | water vapor induce PVDF TEOS hydrophobicity water contact angle |
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