Synthesis of high quality MCM-48 with binary cationic-nonionic surfactants.
Highly ordered MCM-48 was synthesized in the hydrothermal system of a mixture of cationic cetyltrimethylammonium bromide (CTAB) and nonionic poly(ethylene glycol) monooctylphenyl ether (Tx-100) using water glass as the silicon source. The effect of various factors, such as the amount of surfactant, CTAB/Tx-100, Si source, crystallization temperature, and crystallization time, on the synthesis were discussed in detail. The local effective surfactant packing parameter theory and the charge balance theory were used to explain the reason that various factors can affect the product structure reasonably. Especially, the role of Tx-100 was expounded. The optimum synthesis conditions for MCM-48 were obtained.
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China.
Wei
W
Zhao
Quanzhi
Q
Li
Lina
L
Wang
Jinglong
J
Chu
Jinkui
J
Qu
Shaohua
S
Li
Tao
T
Qi
D002412:Cations / Q000737:chemistry; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry*; D003460:Crystallization; D010316:Particle Size; D011092:Polyethylene Glycols / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors
D002412:Cations; D002593:Cetrimonium Compounds; D013501:Surface-Active Agents; C551282:polyethylene glycol monooctylphenyl ether; D011092:Polyethylene Glycols; D012825:Silicon; D000077286:Cetrimonium