Title:
GREEN AND LOW-ENERGY PREPARATION METHOD FOR CELLULOSE NANOFIBERS BASED ON COLD PLASMA
Document Type and Number:
WIPO Patent Application WO/2023/098276
Kind Code:
A1
Abstract:
Disclosed is a green and low-energy preparation method for cellulose nanofibers based on cold plasma. The preparation method comprises the following steps: (1) uniformly mixing cellulose with a FeSO4 solution, so that FeSO4 is immersed into cellulose, and then performing cold plasma treatment under atmospheric-pressure air to obtain oxidized cellulose, the water in the FeSO4 solution being subjected to cold plasma treatment; and (2) washing and suction filtering the oxidized cellulose obtained in step (1), and then carrying out mechanical fibrillation treatment to obtain the cellulose nanofibers (CNF). According to the invention, the cold plasma and the FeSO4 catalyst are compounded to construct a highly oxidizing environment that oxidizes cellulose and obtain CNFs by means of mild mechanical dispersion treatment. The whole process is carried out at normal temperature. The method is simple and mild, and does not require other non-environment-friendly chemicals. Meanwhile, the energy consumption of the nanocrystallization process is significantly reduced, the obtained CNF is uniformly dispersed, and the yield is higher.
Inventors:
CHENG JUNHU (CN)
ZHU HONG (CN)
HAN ZHONG (CN)
MA JI (CN)
ZHU HONG (CN)
HAN ZHONG (CN)
MA JI (CN)
Application Number:
PCT/CN2022/123472
Publication Date:
June 08, 2023
Filing Date:
September 30, 2022
Export Citation:
Assignee:
UNIV SOUTH CHINA TECH (CN)
International Classes:
D01F2/24; B82Y40/00; C08B15/02
Foreign References:
| CN114351273A | 2022-04-15 | |||
| CN108049230A | 2018-05-18 | |||
| CN105296569A | 2016-02-03 | |||
| CN111519475A | 2020-08-11 | |||
| CN112080536A | 2020-12-15 |
Other References:
ZHU HONG, CHENG JUN-HU, MA JI, SUN DA-WEN: "Deconstruction of pineapple peel cellulose based on Fe2+ assisted cold plasma pretreatment for cellulose nanofibrils preparation", FOOD CHEMISTRY, ELSEVIER LTD., NL, vol. 401, 1 February 2023 (2023-02-01), NL , pages 134116, XP093071446, ISSN: 0308-8146, DOI: 10.1016/j.foodchem.2022.134116
RAVINDRAN RAJEEV, SARANGAPANI CHAITANYA, JAISWAL SWARNA, CULLEN P.J., JAISWAL AMIT K.: "Ferric chloride assisted plasma pretreatment of lignocellulose", BIORESOURCE TECHNOLOGY, ELSEVIER, AMSTERDAM, NL, vol. 243, 1 November 2017 (2017-11-01), AMSTERDAM, NL , pages 327 - 334, XP093071448, ISSN: 0960-8524, DOI: 10.1016/j.biortech.2017.06.123
RAVINDRAN RAJEEV, SARANGAPANI CHAITANYA, JAISWAL SWARNA, CULLEN P.J., JAISWAL AMIT K.: "Ferric chloride assisted plasma pretreatment of lignocellulose", BIORESOURCE TECHNOLOGY, ELSEVIER, AMSTERDAM, NL, vol. 243, 1 November 2017 (2017-11-01), AMSTERDAM, NL , pages 327 - 334, XP093071448, ISSN: 0960-8524, DOI: 10.1016/j.biortech.2017.06.123
Attorney, Agent or Firm:
HUAXUE IP AGENCY CO., LTD. (CN)
Download PDF: