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1. WO2020221934 - METHOD FOR MANUFACTURING A SUSPENSION OF CELLULOSE NANOFIBRILS

Publication Number WO/2020/221934
Publication Date 05.11.2020
International Application No. PCT/EP2020/062284
International Filing Date 04.05.2020
IPC
C08B 15/02 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
BPOLYSACCHARIDES; DERIVATIVES THEREOF
15Preparation of other cellulose derivatives or modified cellulose
02Oxycellulose; Hydrocellulose; Cellulose hydrate
C08L 1/04 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
1Compositions of cellulose, modified cellulose, or cellulose derivatives
02Cellulose; Modified cellulose
04Oxycellulose; Hydrocellulose
CPC
C08B 15/02
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
BPOLYSACCHARIDES; DERIVATIVES THEREOF
15Preparation of other cellulose derivatives or modified cellulose ; , e.g. complexes
02Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
C08L 1/04
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
1Compositions of cellulose, modified cellulose or cellulose derivatives
02Cellulose; Modified cellulose
04Oxycellulose; Hydrocellulose ; , e.g. microcrystalline cellulose
Applicants
  • INSTITUT POLYTECHNIQUE DE GRENOBLE [FR]/[FR]
  • CENTRE TECHNIQUE DU PAPIER [FR]/[FR]
Inventors
  • BRAS, Julien
  • ROL, Fleur
  • PETIT-CONIL, Michel
  • MEYER, Valérie
Agents
  • BRONCHART, Quentin
Priority Data
190463902.05.2019FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR MANUFACTURING A SUSPENSION OF CELLULOSE NANOFIBRILS
(FR) PROCÉDÉ DE FABRICATION D'UNE SUSPENSION DE NANOFIBRILLES DE CELLULOSE
Abstract
(EN)
The invention concerns a method for manufacturing 100 a suspension of cellulose nanofibrils from an aqueous suspension of cellulose fibres comprising the following steps: - chemical treatment 110, in a reactor, of the aqueous suspension of cellulose fibres by at least one functionalising agent, the chemical treatment being configured to functionalise the cellulose fibres at a modification rate that is higher, indeed strictly higher, than 1.0 mmol/g, and - mechanical treatment 120, in a twin-screw extruder, of the aqueous suspension of functionalised cellulose fibres, each screw of the extruder comprising at least two fibrillation segments. This optimised method makes it possible to produce a suspension of cellulose nanofibrils of good quality, with a high dry matter content, and while consuming less energy than the methods of the prior art.
(FR)
Procédé de fabrication d'une suspension de nanofibrilles de cellulose L'invention concerne un procédé de fabrication 100 d'une suspension de nanofibrilles de cellulose à partir d'une suspension aqueuse de fibres de cellulose comprenant les étapes suivantes : - un traitement chimique 110, dans un réacteur, de la suspension aqueuse de fibres de cellulose par au moins un agent de fonctionnalisation, le traitement chimique étant paramétré pour fonctionnaliser les fibres de cellulose à un taux de modification supérieur, voire strictement supérieur, à 1,0 mmol/g, et - un traitement mécanique 120, dans une extrudeuse bi-vis, de la suspension aqueuse de fibres de cellulose fonctionnalisées, chaque vis de l'extrudeuse comprenant au moins deux segments de fibrillation. Ce procédé optimisé permet de produire une suspension de nanofibrilles de cellulose de bonne qualité, à fort taux de matière sèche et en consommant moins d'énergie que les procédés de l'art antérieur.
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