Process for producing organic-modified inorganic fine particles

摘要

A process is provided that includes performing a high-temperature high-pressure hydrothermal treatment for a reaction liquid prepared as a mixture of an acylated inorganic fine particle precursor and an organic modifying agent that has a carboxyl group. Because the reaction liquid contains the acylated inorganic fine particle precursor in advance, the grain growth during the high-temperature high-pressure hydrothermal treatment can be suppressed. The process thus enables production of organic-modified inorganic fine particles of a size about the same as or even smaller than that before the high-temperature high-pressure hydrothermal treatment.

主权项

1. A process for producing organic-modified inorganic fine particles, comprising:
acylating inorganic fine particles by mixing the inorganic fine particles with an organic modifying agent that has a carboxyl group to form a mixture of acylated fine particles and the organic modifying agent; charging the mixture of the acylated fine particles and the organic modifying agent into a vessel including deionized water; performing a hydrothermal treatment on the mixture and the deionized water to form a homogeneous mixture of acylated fine particles, the organic modifying agent, and deionized water; and cooling the homogenous mixture, wherein the hydrothermal treatment raises the temperature of the mixture and the deionized water to about 400° C. in two minutes, and maintaining the temperature at 400° C. for 10 minutes.