Title:
CELLULOSE NANOFIBER, SHEET-LIKE MATERIAL OBTAINED THEREFROM, AND METHOD FOR PRODUCING CELLULOSE NANOFIBER AND SHEET-LIKE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2019/138588
Kind Code:
A1
Abstract:
The present invention provides: a cellulose nanofiber enabling the provision of a high-performance sheet-like material; a method for producing the cellulose nanofiber; and a sheet-like material obtained from the cellulose nanofiber. A bamboo-derived cellulose nanofiber having a cellulose purity of at least 90%, a fiber diameter of 10-20 nm, and a crystallinity of at least 70% can be obtained by a method comprising: (1) a step for subjecting a bamboo material to an alkali treatment and a mechanical treatment to prepare bamboo fibers; (2) a step for delignificating the obtained bamboo fibers; (3) a step for mechanically spreading the delignificated bamboo fibers; (4) a step for removing hemicellulose from the spread bamboo fibers; and (5) a step for removing metal components from the bamboo fibers from which hemicellulose has been removed. A high strength sheet material having a tensile strength of 7-200 N for a basis weight of 10-210 g/m2 or a high strength sheet material having a tensile strength of 7-200 N for a density of 0.3-1.1 g/cm3 can be obtained by making this cellulose nanofiber into a sheet.
Inventors:
KINUMOTO TARO (JP)
Application Number:
PCT/JP2018/009537
Publication Date:
July 18, 2019
Filing Date:
March 12, 2018
Export Citation:
Assignee:
NATIONAL UNIV CORPORATION OITA UNIV (JP)
International Classes:
D21H11/12; D21H11/18; D21H15/02
Foreign References:
| JP2014051767A | 2014-03-20 | |||
| JP2008501074A | 2008-01-17 | |||
| JP2017115069A | 2017-06-29 | |||
| JPS5910504B2 | 1984-03-09 | |||
| JP2012012713A | 2012-01-19 |
Other References:
YU , M. J .: "Preparation and characterization of bamboo nanocrystalline cellulose", BIORESOURECES, vol. 7, no. 2, 2012, pages 1802 - 1812, XP002757897
HARUKA MIYOSHI: "Preparation and carbonization of bamboo-derived nano-fibrillated cellulose", 22ND ANNUAL MEETING OF THE CELLULOSE SOCIETY OF JAPAN; 09-10/07/2015, 2015, pages 91, XP009519575
ANONYMOUS: "The price reduction with the tool which new material is easily familiar to use by bamboo", THE ASAHI SHIMBUN, 12 December 2017 (2017-12-12), pages 31, XP009519574
LU , Q. L.: "A mechanochemical approach to manufacturing bamboo cellulose nanocrystals", JOURNAL OF MATERIALS SCIENCE, vol. 50, no. 2, 2015, pages 611 - 619, XP055626460
HE, W.: "Isolation and characterization of cellulose nanofibers from bambusa rigida", BIORSEOURCES, vol. 8, no. 4, 2013, pages 5678 - 5689, XP055626463
HYOE HATAKEYAMA, JAPAN TAPPI JOURNAL, vol. 20, no. 11, 1966, pages 15
"The Japan Wood Research Society, Wood Science Experiment Manual", 2010, BUN-EIDO PUBLISHING CO., LTD., pages: 96 - 97
See also references of EP 3739118A4
HARUKA MIYOSHI: "Preparation and carbonization of bamboo-derived nano-fibrillated cellulose", 22ND ANNUAL MEETING OF THE CELLULOSE SOCIETY OF JAPAN; 09-10/07/2015, 2015, pages 91, XP009519575
ANONYMOUS: "The price reduction with the tool which new material is easily familiar to use by bamboo", THE ASAHI SHIMBUN, 12 December 2017 (2017-12-12), pages 31, XP009519574
LU , Q. L.: "A mechanochemical approach to manufacturing bamboo cellulose nanocrystals", JOURNAL OF MATERIALS SCIENCE, vol. 50, no. 2, 2015, pages 611 - 619, XP055626460
HE, W.: "Isolation and characterization of cellulose nanofibers from bambusa rigida", BIORSEOURCES, vol. 8, no. 4, 2013, pages 5678 - 5689, XP055626463
HYOE HATAKEYAMA, JAPAN TAPPI JOURNAL, vol. 20, no. 11, 1966, pages 15
"The Japan Wood Research Society, Wood Science Experiment Manual", 2010, BUN-EIDO PUBLISHING CO., LTD., pages: 96 - 97
See also references of EP 3739118A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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