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)
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:
Assignee:
THE DOSHISHA (JP)
MEISUI HOLDINGS CO LTD (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
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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