Control of pore size of porous silica by means of pyrolysis of an organic–inorganic polymer hybrid

Abstract

Pyrolysis of a silica gel hybrid with a starburst dendrimer gives porous silica, in which the pore-size is successfully controlled by the size of the organic component used.

Facile Sol-gel Synthesis of Porous Silicas Using Poly(propylene)imine Dendrimers as Templates

“…Poly(amidoamine)dendrimers (PAMAMs), on the other hand, have been used for self-assembly purposes in oxide, hybrid (organic/inorganic), and metallic materials. [13][14][15][16][17][18] In fact, we have recently reported on the use of PAMAM 4.0 as a template to produce porous silicas. 18 However, PAMAM 4.0 collapses upon heating, which results in pores that are significantly smaller than the PAMAM template diameter.…”

Poly(methyl methacrylate) (PMMA)-based hybrid materials with reactive zirconium oxide nanocrystals

“…7 The most simple and convenient idea for construction of transparent and homogeneous hybrid materials is to increase the affinity between organic polymer and inorganic phases. Organic-inorganic hybrid materials are generally prepared by incorporating covalent bonds [8][9][10][11][12][13] or by physical interactions [14][15][16][17][18][19][20][21] to improve the compatibility between organic and inorganic phases.…”

Organic – Inorganic Nano-Hybrid Materials [Translated]^†

“…This interaction due to hydrogen bonding can be confirmed by the fact that, in FT-IR measurement, compared to the case of only organic polymer, the stretching vibrations of the amidocarbonyl group shifts to the low wavenumber side due to hybridization 4), 5) . Further, the fact that the organic polymer is uniformly dispersed in the hybrid can also be confirmed by the fact that by sintering the polymer hybrid it is possible to obtain porous silica having very small holes of molecular order 6) . Apart from the amide group which is the repeting unit in the organic polymer in [1] to [3], it is possible to consider various types as the functional group that acts as the acceptor group of hydrogen bonding.…”