Structure Fabrication Explore and Pore Size Control of SBA-15: MesoDyn and Experiment Study

摘要

Combining method of MesoDyn and experiment is used to in-depth study the formation mechanism, explore the structure fabrication and accurately control the pore size of SBA-15 mesoporous molecular sieve. With a simple copolymer model of Gaussian chains, the phase behavior of tri-block copolymer P123((PEO)20(PPO)70(PEO)20) which is the mainly structure-directing templates of SBA-15 is investigated. And the research is focus on the impact of temperature on the P123 micelle size which can be the key factor affecting the pore structure of SBA-15. The calculated trend of P123 micelle size changing with the temperature is well consistent with experiment result. And mesopore size of SBA-15 can be accurately controlled by changing synthesis temperature. It is concluded that the mesoscopic simulation method is a valuable tool to explore the structure fabrication and accurately control the pore size of SBA-15 mesoporous molecular sieve.