Title:
PROCESS FOR PRODUCING CELLULOSE NANOFIBERS
Document Type and Number:
WIPO Patent Application WO/2010/116826
Kind Code:
A1
Abstract:
A cellulosic raw material is oxidized with an oxidizing agent in water in the presence of (1) an N-oxyl compound and (2) a bromide, an iodide, or a mixture thereof to prepare an oxidized cellulosic raw material, and the oxidized material is subjected to a viscosity reduction treatment and then to a fibrillation/dispersion treatment, thereby efficiently producing, with low energy, a high-concentration cellulose nanofiber dispersion having excellent flowability and transparency. Examples of the viscosity reduction treatment include ultraviolet irradiation, hydrolysis with cellulase and/or hemicellulase, oxidative decomposition with ozone and hydrogen peroxide, hydrolysis with an acid, and combinations of these. It is preferred to remove the N-oxyl compound from the oxidized cellulosic raw material by heating the oxidized cellulosic raw material to 50-120ºC at a pH of 3-10 and washing the resultant material with water.
Inventors:
MIYAWAKI, Shoichi (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
宮脇 正一 (〒02 東京都北区王子５丁目２１番１号 日本製紙株式会社 技術研究所内 Tokyo, 〒1140002, JP)
KATSUKAWA, Shiho (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
勝川 志穂 (〒02 東京都北区王子５丁目２１番１号 日本製紙株式会社 技術研究所内 Tokyo, 〒1140002, JP)
ABE, Hiroshi (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
宮脇 正一 (〒02 東京都北区王子５丁目２１番１号 日本製紙株式会社 技術研究所内 Tokyo, 〒1140002, JP)
KATSUKAWA, Shiho (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
勝川 志穂 (〒02 東京都北区王子５丁目２１番１号 日本製紙株式会社 技術研究所内 Tokyo, 〒1140002, JP)
ABE, Hiroshi (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
Application Number:
JP2010/053570
Publication Date:
October 14, 2010
Filing Date:
March 04, 2010
Export Citation:
Assignee:
NIPPON PAPER INDUSTRIES CO., LTD. (4-1 Oji 1-chome, Kita-ku Tokyo, 02, 〒1140002, JP)
日本製紙株式会社 (〒02 東京都北区王子１丁目４番１号 Tokyo, 〒1140002, JP)
MIYAWAKI, Shoichi (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
宮脇 正一 (〒02 東京都北区王子５丁目２１番１号 日本製紙株式会社 技術研究所内 Tokyo, 〒1140002, JP)
KATSUKAWA, Shiho (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
勝川 志穂 (〒02 東京都北区王子５丁目２１番１号 日本製紙株式会社 技術研究所内 Tokyo, 〒1140002, JP)
日本製紙株式会社 (〒02 東京都北区王子１丁目４番１号 Tokyo, 〒1140002, JP)
MIYAWAKI, Shoichi (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
宮脇 正一 (〒02 東京都北区王子５丁目２１番１号 日本製紙株式会社 技術研究所内 Tokyo, 〒1140002, JP)
KATSUKAWA, Shiho (Pulp and Paper Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
勝川 志穂 (〒02 東京都北区王子５丁目２１番１号 日本製紙株式会社 技術研究所内 Tokyo, 〒1140002, JP)
International Classes:
D01F2/00; C08B13/00; C08B15/02; D06M10/00; D06M11/00; D06M11/34; D06M11/50; D06M15/15; D21H19/34; D06M101/06
Attorney, Agent or Firm:
ONO, Shinjiro et al. (YUASA AND HARA, Section 206 New Ohtemachi Bldg., 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
Download PDF: