摘要
采用十六烷基三甲基溴化铵 (CTAB)为模板剂 ,通过加入不同量的 1,3 ,5 -三甲基苯 (TMB)作为增大孔径的辅助剂合成出了不同孔径大小的氧化硅粉末 ,XRD、N2 吸附曲线等测试手段表明所合成的材料为具有 MCM-4 1结构特征的介孔材料 ;以该种材料制备了超微孔领域的多孔陶瓷 ,同时探讨了辅助剂对材料介孔结构和陶瓷气孔率的影响。结果表明 ,当辅助剂摩尔比小于 x=0 .4时 ,随着辅助剂加入量的增加 ,介孔材料的孔径、比表面积、结晶有序度等相应增加 ,但当加入量超过此范围时 ,结晶有序度反而下降 ,所获得的超微孔陶瓷其最大显气孔率可达 5 6%
Superfine silica powder with different pore sizes was synthesized with hexadecyl trimethyl ammonium bromide (CTAB) as templating agent ,by adding 1,3,5 trimethylbenzene (TMB) as assistant agent. The results of XRD and N 2 adsorption measurement show that these materials have the structural characteristics of MCM 41.The supreme microporous ceramics were also prepared with above materials and the effects of assistant agent on mesoporous structure and porosity of ceramics were analyzed.The results show that , when the molar ratio of TMB is below x =0.4, pore sizes, crystallized order and surface of the samples increase with the incremental addition of TMB , but crystallized order decrease when it exceeds the extent, and the ceramics exhibit finally apparent porosities viz 56%.
出处
《武汉理工大学学报》
CAS
CSCD
2002年第9期1-4,共4页
Journal of Wuhan University of Technology
