Silica swelling agents

Pore size engineering of mesoporous silicas using alkanes as swelling agents... 

Pore Size Engineering of Mesoporous Silicas Using Alkanes as Swelling Agents 75... 

The pore sizes of M41S family mesoporous materials are about 3 1 nm. 2 31 The pore sizes of mesoporous silica are extended to 30 nm by SBA-15 and FDU-12, etc. material. The classical method to adjust pore size is to vary the chain length of the surfactant or to add swelling agent. Now, there are many strategies available for changing pore size.[163] The basic principle is the same change the size and volume of micelles. Most methods are listed as follows ... 

Moreover, diffusion pathways can be individually designed by templating particular phase structures. Above all, the pore system of a macroscopic object is exclusively determined by the pore system, whereas particulate powders show a significant contribution to the surface area caused by the nonstructured particle surface. The direct liquid crystal templating approach was also used to prepare monolithic silica from TMOS or TEOS in block copolymer-water mixtures mixed with alcohol cosurfactants and hydrophobic swelling agents [39-41]. 

Size-tunable silica crosslinked micellar core-shell nanoparticles (SCMCSNs) from aPluronic nonionic surfactant (FI 27) template system with organic swelling agents such as 1,3,5-trimethylbenzene (TMB) and octanoic acid at room temperature... 

Monitoring Inner Surface in M41S Silicas in Presence of Swelling Agents... 

FIGURE 2.7 Meso-tetraspirocyclohexyl calix[4]pyrrole (MTCP) as swelling agent for enhancing Al-MCM-41 pore size Synthesis of micelle template silicas (MTS) [19]. 

The highly OMS was postulated by Huo et al. [7] under strongly acidic conditions. Mesoporous silicas SBA-1 were synthesized by using a template and TEOS as the silica source. The MCF structure of OMSs was created by a large amount of 1,3,5-trimethylbenzene (TMB) in the synthesis system for SBA-15. TMB is a swelling agent of the mesopores [8]. These mesoporous materials were newly used as templates for the synthesis of ordered mesoporous carbon such as CMK (Carbon Material KAIST)-x [9]. Lee and coworkers [10] reported a similar concept for the preparation of mesoporous carbon. 

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