原位水热法制备高密度且均一b-轴取向MFI分子筛晶粒层

发布时间：2018-02-01 14:28

  本文关键词： 壳聚糖/SiO复合涂层 原位水热合成 b-轴取向MFI型分子筛晶种层　出处：《材料导报》2016年S1期 　论文类型：期刊论文

【摘要】：发展了一种利用原位水热法,通过采用壳聚糖/SiO_2复合涂层对载体表面修饰和改性,实现在载体表面获得密度高且均一b-轴取向MFI型分子筛晶粒层的方法。考察了复合涂层中壳聚糖/SiO2质量比、分子筛合成液配比及晶化时间对取向晶种层的影响规律。结果表明,壳聚糖与SiO_2质量比为0.15、分子筛合成液配比为1TPAOH∶0.2TEOS∶90H2O、170℃反应3h时,在玻璃载体表面得到连续、致密且高度b-轴取向的MFI型分子筛晶种层。
[Abstract]:An in-situ hydrothermal method was developed to modify and modify the surface of the carrier by using chitosan / SiOs-2 composite coating. The method of obtaining MFI molecular sieve grain layer with high density and uniform b-axis orientation on the surface of the carrier was achieved. The mass ratio of chitosan / Sio _ 2 in the composite coating was investigated. The effect of molecular sieve synthesis liquid ratio and crystallization time on the oriented seed layer was studied. The results showed that the mass ratio of chitosan to SiO_2 was 0. 15. When the molar ratio of molecular sieve synthetic liquid is 1 TPAOH: 0.2TEOS: 90 H _ 2O reaction at 170 鈩，

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