METHOD FOR PRODUCING CELLULOSE NANOFIBERS
Cellulose nanofibers are produced by means of a method involving a step (A) for oxidizing a cellulose-based starting material in the presence of an N-oxyl compound and such, a step (B) for forming the oxidized cellulose-based starting material into nanofibers by fibrillating the oxidized cellulose-b...
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| creator | KOYANAGI, TOMOAKI FUKAZAWA, MASAHIKO MIYAWAKI, SHOICHI TSUJI, SHIHO |
| description | Cellulose nanofibers are produced by means of a method involving a step (A) for oxidizing a cellulose-based starting material in the presence of an N-oxyl compound and such, a step (B) for forming the oxidized cellulose-based starting material into nanofibers by fibrillating the oxidized cellulose-based starting material, and a step (C) for performing at least one of the following steps: step (C-1) for processing the cellulose-based starting material in water having a hydroxide ion concentration of 0.75 to 3.75 mol/L prior to performing step (A); and step (C-2) for subjecting the oxidized cellulose-based starting material obtained from step (A) to hydrolysis in an alkaline solution having a pH between 8 and 14 after performing step (A) and prior to performing step (B).
Cette invention concerne des nanofibres en cellulose qui sont produites par un procédé impliquant une étape (A) d'oxydation d'un matériau de départ cellulosique en présence d'un composé de N-oxyle, une étape (B) de conversion du matériau de départ cellulosique oxydé en nanofibres par fibrillation du matériau de départ cellulosique oxydé, et une étape (C) de mise en uvre d'au moins une des étapes suivantes : étape (C-1) de traitement du matériau de départ cellulosique dans une eau ayant une concentration d'ions hydroxyde de 0,75 à 3,75 mol/L avant mise en uvre de l'étape (A); et étape (C-2) de soumission du matériau de départ cellulosique oxydé obtenu à l'étape (A) à hydrolyse dans une solution alcaline ayant un pH entre 8 et 14 après mise en uvre de l'étape (A) et avant mise en uvre de l'étape (B). |
| format | Patent |
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Cette invention concerne des nanofibres en cellulose qui sont produites par un procédé impliquant une étape (A) d'oxydation d'un matériau de départ cellulosique en présence d'un composé de N-oxyle, une étape (B) de conversion du matériau de départ cellulosique oxydé en nanofibres par fibrillation du matériau de départ cellulosique oxydé, et une étape (C) de mise en uvre d'au moins une des étapes suivantes : étape (C-1) de traitement du matériau de départ cellulosique dans une eau ayant une concentration d'ions hydroxyde de 0,75 à 3,75 mol/L avant mise en uvre de l'étape (A); et étape (C-2) de soumission du matériau de départ cellulosique oxydé obtenu à l'étape (A) à hydrolyse dans une solution alcaline ayant un pH entre 8 et 14 après mise en uvre de l'étape (A) et avant mise en uvre de l'étape (B).</description><language>eng ; fre</language><subject>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS ; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES ; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS ; CHEMISTRY ; COMPOSITIONS BASED THEREON ; DERIVATIVES THEREOF ; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR ; HUMAN NECESSITIES ; HYGIENE ; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES ; MEDICAL OR VETERINARY SCIENCE ; METALLURGY ; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL ; NATURAL OR ARTIFICIAL THREADS OR FIBRES ; ORGANIC MACROMOLECULAR COMPOUNDS ; POLYSACCHARIDES ; SPINNING ; TEXTILES ; THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><creationdate>2017</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170725&DB=EPODOC&CC=CA&NR=2831897C$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170725&DB=EPODOC&CC=CA&NR=2831897C$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KOYANAGI, TOMOAKI</creatorcontrib><creatorcontrib>FUKAZAWA, MASAHIKO</creatorcontrib><creatorcontrib>MIYAWAKI, SHOICHI</creatorcontrib><creatorcontrib>TSUJI, SHIHO</creatorcontrib><title>METHOD FOR PRODUCING CELLULOSE NANOFIBERS</title><description>Cellulose nanofibers are produced by means of a method involving a step (A) for oxidizing a cellulose-based starting material in the presence of an N-oxyl compound and such, a step (B) for forming the oxidized cellulose-based starting material into nanofibers by fibrillating the oxidized cellulose-based starting material, and a step (C) for performing at least one of the following steps: step (C-1) for processing the cellulose-based starting material in water having a hydroxide ion concentration of 0.75 to 3.75 mol/L prior to performing step (A); and step (C-2) for subjecting the oxidized cellulose-based starting material obtained from step (A) to hydrolysis in an alkaline solution having a pH between 8 and 14 after performing step (A) and prior to performing step (B).
Cette invention concerne des nanofibres en cellulose qui sont produites par un procédé impliquant une étape (A) d'oxydation d'un matériau de départ cellulosique en présence d'un composé de N-oxyle, une étape (B) de conversion du matériau de départ cellulosique oxydé en nanofibres par fibrillation du matériau de départ cellulosique oxydé, et une étape (C) de mise en uvre d'au moins une des étapes suivantes : étape (C-1) de traitement du matériau de départ cellulosique dans une eau ayant une concentration d'ions hydroxyde de 0,75 à 3,75 mol/L avant mise en uvre de l'étape (A); et étape (C-2) de soumission du matériau de départ cellulosique oxydé obtenu à l'étape (A) à hydrolyse dans une solution alcaline ayant un pH entre 8 et 14 après mise en uvre de l'étape (A) et avant mise en uvre de l'étape (B).</description><subject>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS</subject><subject>CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES</subject><subject>CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS</subject><subject>CHEMISTRY</subject><subject>COMPOSITIONS BASED THEREON</subject><subject>DERIVATIVES THEREOF</subject><subject>DISINFECTION, STERILISATION, OR DEODORISATION OF AIR</subject><subject>HUMAN NECESSITIES</subject><subject>HYGIENE</subject><subject>MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES</subject><subject>MEDICAL OR VETERINARY SCIENCE</subject><subject>METALLURGY</subject><subject>METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL</subject><subject>NATURAL OR ARTIFICIAL THREADS OR FIBRES</subject><subject>ORGANIC MACROMOLECULAR COMPOUNDS</subject><subject>POLYSACCHARIDES</subject><subject>SPINNING</subject><subject>TEXTILES</subject><subject>THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZND0dQ3x8HdRcPMPUggI8ncJdfb0c1dwdvXxCfXxD3ZV8HP083fzdHINCuZhYE1LzClO5YXS3Azybq4hzh66qQX58anFBYnJqXmpJfHOjkYWxoYWlubOxoRVAACpFSOk</recordid><startdate>20170725</startdate><enddate>20170725</enddate><creator>KOYANAGI, TOMOAKI</creator><creator>FUKAZAWA, MASAHIKO</creator><creator>MIYAWAKI, SHOICHI</creator><creator>TSUJI, SHIHO</creator><scope>EVB</scope></search><sort><creationdate>20170725</creationdate><title>METHOD FOR PRODUCING CELLULOSE NANOFIBERS</title><author>KOYANAGI, TOMOAKI ; FUKAZAWA, MASAHIKO ; MIYAWAKI, SHOICHI ; TSUJI, SHIHO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CA2831897C3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2017</creationdate><topic>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS</topic><topic>CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES</topic><topic>CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS</topic><topic>CHEMISTRY</topic><topic>COMPOSITIONS BASED THEREON</topic><topic>DERIVATIVES THEREOF</topic><topic>DISINFECTION, STERILISATION, OR DEODORISATION OF AIR</topic><topic>HUMAN NECESSITIES</topic><topic>HYGIENE</topic><topic>MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES</topic><topic>MEDICAL OR VETERINARY SCIENCE</topic><topic>METALLURGY</topic><topic>METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL</topic><topic>NATURAL OR ARTIFICIAL THREADS OR FIBRES</topic><topic>ORGANIC MACROMOLECULAR COMPOUNDS</topic><topic>POLYSACCHARIDES</topic><topic>SPINNING</topic><topic>TEXTILES</topic><topic>THEIR PREPARATION OR CHEMICAL WORKING-UP</topic><toplevel>online_resources</toplevel><creatorcontrib>KOYANAGI, TOMOAKI</creatorcontrib><creatorcontrib>FUKAZAWA, MASAHIKO</creatorcontrib><creatorcontrib>MIYAWAKI, SHOICHI</creatorcontrib><creatorcontrib>TSUJI, SHIHO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KOYANAGI, TOMOAKI</au><au>FUKAZAWA, MASAHIKO</au><au>MIYAWAKI, SHOICHI</au><au>TSUJI, SHIHO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD FOR PRODUCING CELLULOSE NANOFIBERS</title><date>2017-07-25</date><risdate>2017</risdate><abstract>Cellulose nanofibers are produced by means of a method involving a step (A) for oxidizing a cellulose-based starting material in the presence of an N-oxyl compound and such, a step (B) for forming the oxidized cellulose-based starting material into nanofibers by fibrillating the oxidized cellulose-based starting material, and a step (C) for performing at least one of the following steps: step (C-1) for processing the cellulose-based starting material in water having a hydroxide ion concentration of 0.75 to 3.75 mol/L prior to performing step (A); and step (C-2) for subjecting the oxidized cellulose-based starting material obtained from step (A) to hydrolysis in an alkaline solution having a pH between 8 and 14 after performing step (A) and prior to performing step (B).
Cette invention concerne des nanofibres en cellulose qui sont produites par un procédé impliquant une étape (A) d'oxydation d'un matériau de départ cellulosique en présence d'un composé de N-oxyle, une étape (B) de conversion du matériau de départ cellulosique oxydé en nanofibres par fibrillation du matériau de départ cellulosique oxydé, et une étape (C) de mise en uvre d'au moins une des étapes suivantes : étape (C-1) de traitement du matériau de départ cellulosique dans une eau ayant une concentration d'ions hydroxyde de 0,75 à 3,75 mol/L avant mise en uvre de l'étape (A); et étape (C-2) de soumission du matériau de départ cellulosique oxydé obtenu à l'étape (A) à hydrolyse dans une solution alcaline ayant un pH entre 8 et 14 après mise en uvre de l'étape (A) et avant mise en uvre de l'étape (B).</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES THEREOF DISINFECTION, STERILISATION, OR DEODORISATION OF AIR HUMAN NECESSITIES HYGIENE MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MEDICAL OR VETERINARY SCIENCE METALLURGY METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS POLYSACCHARIDES SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP |
| title | METHOD FOR PRODUCING CELLULOSE NANOFIBERS |
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