Title:
LATENT-HEAT STORAGE MATERIAL MICROCAPSULES AND PROCESS FOR PRODUCING LATENT-HEAT STORAGE MATERIAL MICROCAPSULES
Document Type and Number:
WIPO Patent Application WO/2017/200021
Kind Code:
A1
Abstract:
According to the present invention, the surfaces of core particles are subjected to a boehmite treatment in a solution containing Al ions to thereby form a primary coating film, and thereafter the solution is cooled to a temperature at which the solution becomes supersaturated with Al ions, thereby precipitating aluminum hydroxide on the surface of the primary coating film to form a secondary coating film. This secondary coating film is heat-treated in an oxidizing atmosphere to thereby form an aluminum oxide coating film on the surfaces of the core particles. Thus, the shells are thickened by a thickness corresponding to the formation of the secondary coating film. Hence, the cycle strength of the capsules is ensured, and the PCM is significantly inhibited from changing in composition during the production process.
Inventors:
NOMURA TAKAHIRO (JP)
AKIYAMA TOMOHIRO (JP)
SHENG NAN (JP)
HANZAKI DAIKI (JP)
AKIYAMA TOMOHIRO (JP)
SHENG NAN (JP)
HANZAKI DAIKI (JP)
Application Number:
PCT/JP2017/018587
Publication Date:
November 23, 2017
Filing Date:
May 17, 2017
Export Citation:
Assignee:
UNIV HOKKAIDO NAT UNIV CORP (JP)
International Classes:
C09K5/06; B22F1/00; B22F1/16; C09K5/14; C23C20/08; C23C28/00; C23C28/04; F28D20/02
Domestic Patent References:
| WO2015162929A1 | 2015-10-29 | |||
| WO2015031788A1 | 2015-03-05 |
Foreign References:
| JP2000038602A | 2000-02-08 | |||
| CN102251234A | 2011-11-23 | |||
| JP2004149847A | 2004-05-27 | |||
| US4657067A | 1987-04-14 | |||
| JPH01113486A | 1989-05-02 |
Attorney, Agent or Firm:
OHNO Seiji et al. (JP)
Download PDF: