Journal of Liaoning Petrochemical University ›› 2006, Vol. 26 ›› Issue (2): 19-22.

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Factors of Silicon Dioxide Inorganic Membrane Prepared by Sol -Gel Method

  

  1. School of Petrochemical Technology , Liaoning University of Petroleum & Chemical Technology ,
    Fushun Liaoning 113001, P .R .China
  • Received:2005-10-13 Published:2006-02-25 Online:2006-02-25

溶胶-凝胶法制备SiO2 无机膜的影响因素

邱国民, 王兴利, 张克铮＊   

  1. 辽宁石油化工大学石油化工学院, 辽宁抚顺113001
  • 作者简介:邱国民(1981 -), 男, 江苏吴江市, 在读硕士。

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Abstract:

　   Silicon dioxide inorganic membranes on Al2O3 matrix were prepared by Sol -Gel method using tetraethox ysilane (TEOS)as precursor and ethanol as the solvent .The effects of pH , chemical additives, heat treatment rate of temperature increase and the mole ratio of TEOS to ethanol on the quality of inorganic membranes were investigated .The results show that pH can affect the polymerization rate of TEOS , accordingly relate the quality of film directly .The gelation time is the long est w hen pH is 1 .8.Adding chemical additive N , N -dimethylformamide can prevent the film to chap.The rate of temperature increase during the heat treatment process is the main factor of film quality .Controlling the rate of temperature increase should be divide into two stages.It is controlled a t 0 .5 ℃/min before 210 ℃, and 1 ℃/ min from 210 ℃ to 600 ℃.When the mole ratio of TEOS to ethanol is 1∶6 .08,the film coating period is shorter than that of 1∶13 .64.

Key words: 　Sol-Gel method, 　Preparation , 　Silicon dioxide , 　Ino rganic membranes

摘要： 　    以正硅酸乙酯为先驱体, 乙醇为溶剂, 用溶胶-凝胶法在Al2O3 基体上制备了SiO2 无机膜, 就pH 、化学添加剂、热处理过程中升温速率、正硅酸乙酯和乙醇的摩尔比对无机膜质量的影响进行了研究。结果表明, pH 影响正硅酸乙酯的聚合速度, 从而直接关系到膜层的质量, pH 为1 .8 时, 凝胶时间最长;加入化学添加剂N , N -二甲基甲酰胺能够防止膜层龟裂;在后续加热过程中, 升温速率是影响膜层质量的主要因素, 控制升温速率应该分为两个阶段, 在210 ℃之前应控制升温速率在0 .5 ℃/ min , 在210 ～ 600 ℃应控制在1 ℃/ min;正硅酸乙酯和乙醇的摩尔比为1∶6.08 时的涂膜周期比1∶13.64 时的涂膜周期短。

关键词: 　溶胶-凝胶法, 　制备, 　二氧化硅, 　无机膜

Cite this article

QIU Guo -min,WANG Xing -li,ZHANG Ke -zheng. Factors of Silicon Dioxide Inorganic Membrane Prepared by Sol -Gel Method[J]. Journal of Liaoning Petrochemical University, 2006, 26(2): 19-22.

邱国民, 王兴利, 张克铮. 溶胶-凝胶法制备SiO2 无机膜的影响因素[J]. 辽宁石油化工大学学报, 2006, 26(2): 19-22.

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