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Patent Searching and Data


Title:
METHOD FOR PRODUCING ANTIMICROBIAL ZINC OXIDE POWDER
Document Type and Number:
WIPO Patent Application WO/2018/198857
Kind Code:
A1
Abstract:
Provided is a method for producing a zinc oxide powder that exhibits an excellent antimicrobial performance even when blocked from light. This production method contains a step for adding 150-250 g of a hexagonal flake-shaped zinc oxide powder to 1 liter of an aqueous zinc nitrate solution having a concentration of 2-4 M (mol/L) and performing a hydrothermal treatment for 5-15 hours at 130°C-180°C, and a step for subjecting the basic zinc nitrate produced by this hydrothermal treatment to a heat treatment for 0.5-3 hours at a temperature of 550°C-700°C in air or an inert gas atmosphere. This heat treatment is preferably carried out at a temperature of 575°C-650°C, and the antimicrobial activity per unit mass can be increased by pulverizing the powder after the heat treatment.

Inventors:
HIROTA KEN (JP)
KATO MASAKI (JP)
TSUKAGOSHI KAZUHIKO (JP)
HIROTA SHOKO (JP)
SUZUKI YUSEI (JP)
NAGAI HIDEKI (JP)
YOSHIKAWA MASATAKA (JP)
Application Number:
PCT/JP2018/015707
Publication Date:
November 01, 2018
Filing Date:
April 16, 2018
Export Citation:
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Assignee:
THE DOSHISHA (JP)
MEISUI HOLDINGS CO LTD (JP)
International Classes:
C01G9/02; A01N25/12; A01N59/16; A01P3/00; B01J23/06; B01J35/02; B01J37/08; B01J37/10
Other References:
HIROTA, KEN ET AL.: "Preparation of zinc oxide ceramics with a sustainable antibacterial activity under dark conditions", CERAMICS INTERNATIONAL, vol. 36, no. 2, March 2010 (2010-03-01), pages 497 - 506, XP026808103
JIN, D. H. ET AL.: "Morphology-controlled synthesis of ZnO crystals with twinned structures and the morphology dependence of their antibacterial activities", MATERIALS LETTERS, vol. 115, 15 January 2014 (2014-01-15), pages 205 - 207, XP028784364
MALA, N. ET AL.: "Formation of hexagonal plate shaped ZnO microparticles- A study on antibacterial and magnetic properties", CERAMICS INTERNATIONAL, vol. 42, no. 6, May 2016 (2016-05-01), pages 7336 - 7346, XP029461688
Attorney, Agent or Firm:
MINORI PATENT PROFESSION CORPORATION (JP)
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