Mesoporous silica - particles, a process for preparing mesoporous silicon dioxide - particles and mesoporous molded article containing silicon - particles

摘要

An object of the present invention is to provide mesoporous silica - particles, the functions, such as a low refractive index (low - n), low dielectric constant (low - k) and low thermal conductivity and also a molded article can impart to the higher strength. The mesoporous silica - particles in each case comprise a core - particles, the first mesopores, wherein a periphery of the core - particles is covered with silicon dioxide. Preferably, second mesopores, smaller than the first mesopores, in which silicon dioxide - covered part, formed by means of the silicon dioxide - covering provided. The mesoporous silica - particles are prepared by: a manufacturing step for surfactant - complex - silicon dioxide - particles of the mixing of a surfactant, water, of an alkali, an additive containing a hydrophobic part and a silicon dioxide - source, in order in this case, surfactant - complex - silicon dioxide - particles in which the additive containing a hydrophobic part includes a hydrophobic part to increase the volume of micelles, which are to be formed by the surfactant; and a silicon dioxide - covering - step of the addition of the silicon dioxide - source to the surfactant - complex - silicon dioxide - particles, in order in this case, a periphery of core - particles to be covered with silicon dioxide. The penetration of a matrix - material can be inhibited in the mesopores.