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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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研磨对介孔分子筛sba-15结构的影响
, PP. 71-75
Keywords: 介孔分子筛,sba-15,研磨,机械性能
Abstract:
考察了研磨对经不同脱模方法得到的sba-15介孔分子筛的结构的影响.用n2吸附-脱附、xrd、ft-ir、29sicpmasnmr等手段对样品的结构进行了表征,发现研磨对sba-15的孔结构有一定的破坏作用,导致样品的长程有序性降低,表面积、孔容下降,孔径减小.同时,研磨增加了孔壁中的结构缺陷,机械压力使孔壁发生了收缩,壁中的小孔/微孔减少.对不同方法脱模的介孔样品,焙烧脱模样品的机械性能强于乙醇抽提脱模样品,研磨对其结构的影响较小,这是由于焙烧过程有利于孔壁缩合和紧固的缘故.
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