| 分离有机蒸气/氮气的SiO_2超滤膜的制备 |
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| 引用本文： | 钟璟,梁建友,唐士林,汤一华,白银娟.分离有机蒸气/氮气的SiO_2超滤膜的制备[J].天然气化工,2007,32(5):28-31,39. |
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| 作者姓名： | 钟璟 梁建友 唐士林 汤一华 白银娟 |
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| 作者单位： | 江苏工业学院化学工程系,常州,213016 |
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| 基金项目： | 国家自然科学基金;江苏省精细石油化工重点实验室基金 |
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| 摘 要： | 以ZrO2为载体,正硅酸乙酯(TEOS)、乙醇、水为原料,制备了纳米级孔径的SiO2超滤膜,并用液-液排除法和扫描电子显微镜进行表征。考察了溶胶粘度、涂膜时间和支撑体孔径对成膜效果的影响。研究结果表明,合适的制膜参数为:溶胶配比n(TEOS)/n(水)/n(乙醇)=1/8/4,涂膜时间30 s,支撑体孔径35nm左右。四次涂膜可以得到最可几孔半径为1.96nm的S iO2膜;在操作压力0.10MPa下,其对正己烷/氮气的分离因子可达到1.61,进一步改性后用于有机蒸气/氮气的分离。
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| 关 键 词： | 正硅酸乙酯 SiO2超滤膜 制膜条件 正己烷/氮气 分离因子 |
| 文章编号： | 1001-9219（2007）05-28-04 |
| 修稿时间： | 2007-02-11 |
Preparation of Silica Ultra-filtration Membranes for Organic Vapor/Nitrogen Separation |
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| ZHONG Jing,HANG Jian-you,TANG Shi-lin,TANG Yi-hua,BAI Yin-juan.Preparation of Silica Ultra-filtration Membranes for Organic Vapor/Nitrogen Separation[J].Natural Gas Chemical Industry,2007,32(5):28-31,39. |
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| Authors: | ZHONG Jing HANG Jian-you TANG Shi-lin TANG Yi-hua BAI Yin-juan |
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| Affiliation: | Department of Chemical Engineering, Jiangsu Polytechnic University, Changzhou 213016, China |
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| Abstract: | Crack-free silica ultra-filtration membranes with pore radius of 1.96nm were prepared by sol-gel technique.Tetraethyl orthosilicate(TEOS),ethanol and water were used as raw materials and ZrO2 membranes with pore radius of 30-60nm were used as supports.The effects of sol viscosity,dip-coating time and membrane pore size of support on the preparation of SiO2 membranes were investigated and the optimum parameters are the TEOS/water/ethanol molar ratio of 1∶8∶4,dip-coating time of 30s and pore size of support located in about 35nm.The separation factor of the prepared SiO2 membrane for n-hexane/nitrogen is 1.61 at trans-membrane pressure of 0.10MPa and can be used in the separation of light hydrocarbon/nitrogen after modification. |
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| Keywords: | tetraethyl orthosilicate SiO2 ultra-filtration membranes preparation parameters n-hexane/nitrogen separation factor |
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