改进浸浆法制备氧化钛/多孔钛复合微滤膜

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1南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009


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金属陶瓷复合膜以多孔金属为载体、多孔陶瓷为活性分离层,结合了陶瓷膜和金属膜的优点,具有良好的工业应用前景.采用改进浸浆法制备氧化钛/多孔钛复合微滤膜.将氧化钛粉体分散到氧化钛溶胶中作为制膜液,以提高制膜液在多孔金属支撑体表面的润湿性.结果表明,相同温度下溶胶的表面张力远小于水的表面张力,溶胶分散制膜液的表面张力也远小于水分散制膜液的表面张力.由此明显地改变了制膜液和支撑体的润湿性能,从而可以制备得到连续完整的膜层.由于溶胶粒子对粒径较大的氧化钛颗粒的烧结促进作用,使得膜层可以在较低的温度下烧结.在850℃下烧结的膜层平均孔径为0.31 μm,且分布较窄.膜层表面完整无缺陷,与支撑体结合情况良好,膜层厚度约为17 μm.膜层N2渗透通量为6.6×105 L/(m2·h)(0.1 MPa).

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DOI: http://dx.doi.org/10.3969/j.issn.1007-8924.2011.03.032

语种: 中文   

基金国家重点基础研究发展计划(973计划)(2009CB623400)

关键词氧化钛 多孔钛 溶胶 浸浆 复合膜


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