PROCESS FOR PARTIAL DELIGNIFICATION AND FILLING OF A LIGNOCELLULOSIC MATERIAL, AND COMPOSITE MATERIAL STRUCTURE ABLE TO BE OBTAINED BY THIS PROCESS

The invention relates to a process for treating a lignocellulosic material, preferably wood, comprising the following steps: (1) soaking of the material with organic fluid in order to dissolve at least 40% and at most 85%, in weight %, of the lignin of the material; (2) washing with organic fluid so as to discharge the dissolved lignin; (3) filling with a filling compound; and (4) finishing, so as to obtain a composite formed of a three-dimensional network of transformed filling compound incorporated into a cellulose and lignin network. The invention also relates to a composite structure able to be obtained in this way, and to any part comprising at least one such structure. 1. A treatment process for treating a structure of lignocellulosic material , comprising:(a) soaking the structure of lignocellulosic material with at least one fluid to dissolve at least 40% and at most 85% by weight % of the lignin present in the material;(b) washing the structure resulting from (a) with at least one fluid so as to discharge the dissolved lignin, so as to produce a partially delignified structure;(c) filling the partially delignified structure with at least one filling compound, so as to produce a filled partially delignified structure; and(d) finishing the filled partially delignified structure, so as to obtain a composite material structure formed of a three-dimensional network of transformed filling compound incorporated in a network of cellulose and lignin.2. The treatment process according to claim 1 , wherein the structure of lignocellulosic material is a trimming member claim 1 , a finishing member or a structure member.3. The treatment process according to claim 1 , wherein the fluid used in (a) is:an aqueous solution comprising a mixture of sodium chloride and sodium hydroxide, or an aqueous liquid comprising monoethanolamine, or a basic solution comprising KOH;{'sub': 2', '4', '3', '4, 'an aqueous solution comprising a mixture of acetic acid and hydrogen peroxide, or ...

PROCESS FOR PARTIAL DELIGNIFICATION AND FILLING OF A LIGNOCELLULOSIC MATERIAL, AND COMPOSITE MATERIAL STRUCTURE ABLE TO BE OBTAINED BY THIS PROCESS

The invention relates to a process for treating a lignocellulosic material, e.g., wood, comprising the following steps: providing a lignocellulosic material; removing at least some but less than all lignin from the lignocellulosic material to yield a delignified structure; and densifying the delignified structure to yield the delignified, densified material, wherein the delignified, densified material is equal in size or is smaller in size relative to the lignocellulosic material provided; where densifying may include contacting said delignified structure, at least in part, with at least one fluid at a pressure greater than atmospheric pressure. The invention also relates to a composite structure able to be obtained in this way, and to any part comprising at least one such structure.

PROCESS FOR PARTIAL DELIGNIFICATION AND FILLING OF A LIGNOCELLULOSIC MATERIAL, AND COMPOSITE MATERIAL STRUCTURE ABLE TO BE OBTAINED BY THIS PROCESS

The invention relates to a process for treating a lignocellulosic material, preferably wood, comprising the following steps: () soaking of the material with organic fluid in order to dissolve at least 40% and at most 85%, in weight %, of the lignin of the material; () washing with organic fluid so as to discharge the dissolved lignin; () filling with a filling compound; and () finishing, so as to obtain a composite formed of a three-dimensional network of transformed filling compound incorporated into a cellulose and lignin network. The invention also relates to a composite structure able to be obtained in this way, and to any part comprising at least one such structure. 1. A treatment process for treating a structure of lignocellulosic material , comprising:(a) soaking the structure of lignocellulosic material with at least one organic fluid to dissolve at least 40% and at most 85% by weight % of the lignin present in the material;(b) washing the structure resulting from (a) with at least one organic fluid so as to discharge the dissolved lignin, so as to produce a partially delignified structure;(c) filling the partially delignified structure with at least one filling compound, so as to produce a filled partially delignified structure; and(d) finishing the filled partially delignified structure, so as to obtain a composite material structure formed of a three-dimensional network of transformed filling compound incorporated in a network of cellulose and lignin.2. The treatment process according to claim 1 , wherein the structure of lignocellulosic material is a trimming member claim 1 , a finishing member or a structure member.3. The treatment process according to claim 1 , wherein the organic fluid used in (a) is:an aqueous solution comprising a mixture of sodium chloride and sodium hydroxide, or an aqueous liquid comprising monoethanolamine, or a basic solution comprising KOH;{'sub': 2', '4', '3', '4, 'an aqueous solution comprising a mixture of acetic acid and ...

Process for partial delignification and filling of a lignocellulosic material, and composite structure able to be obtained by this process

The invention relates to a process for treating a lignocellulosic material, preferably wood, comprising the following steps: (1) soaking of the material with organic fluid in order to dissolve at least 40% and at most 85%, in weight %, of the lignin of the material; (2) washing with organic fluid so as to discharge the dissolved lignin; (3) filling with a filling compound; and (4) finishing, so as to obtain a composite formed of a three-dimensional network of transformed filling compound incorporated into a cellulose and lignin network. The invention also relates to a composite structure able to be obtained in this way, and to any part comprising at least one such structure.

Process for partial delignification and filling of a lignocellulosic material, and composite structure able to be obtained by this process

The invention relates to a process for treating a lignocellulosic material, preferably wood, comprising the following steps: (1) soaking of the material with organic fluid in order to dissolve at least 40% and at most 85%, in weight %, of the lignin of the material; (2) washing with organic fluid so as to discharge the dissolved lignin; (3) filling with a filling compound; and (4) finishing, so as to obtain a composite formed of a three-dimensional network of transformed filling compound incorporated into a cellulose and lignin network. The invention also relates to a composite structure able to be obtained in this way, and to any part comprising at least one such structure.

Method for preparing structurally coloured films and pigments

Procede de delignification partielle et de remplissage d'un materiau ligno cellulosique, et structure de materiau composite obtenue par ce procede

Menetelmä lignoselluloosamateriaalin osittaiseksi delignifioimiseksi ja täyttämiseksi sekä tällä menetelmällä saatava yhdistelmämateriaalirakenne

Procede de delignification partielle et de remplissage d'un materiau ligno-cellulosique, et structure de materiau composite susceptible d'etre obtenue par ce procede

L'invention concerne un procédé de traitement de matériau ligno-cellulosique, de préférence de bois, comprenant les étapes suivantes : (1 ) un trempage du matériau par fluide organique pour dissoudre au moins 40% et au plus 85% en % poids de la lignine du matériau; (2) un lavage par fluide organique de sorte à évacuer la lignine dissoute; (3) un remplissage par un composé de remplissage; et (4) une finition, de sorte à obtenir un matériau composite formé d'un réseau tridimensionnel de composé de remplissage transformé incorporé dans un réseau de cellulose et de lignine. L'invention concerne aussi une structure de matériau composite susceptible d'être ainsi obtenue, et toute pièce comprenant au moins une telle structure.

Sposób częściowej delignifikacji i wypełniania materiału lignocelulozowego oraz struktura z materiału kompozytowego możliwa do otrzymania tym sposobem

Method for preparing structurally coloured films and pigments

The invention relates to a method for producing structurally coloured films, particles and interference pigments comprising cellulose nanocrystals, such as neutralised cellulose nanocrystals. The films and particles can be used as interference pigments or coloured particles such as glitters for various applications. The method comprises steps of depositing a nanocrystal suspension comprising cellulose nanocrystals onto a substrate; spreading the nanocrystal suspension across the substrate using a spreader; ageing the nanocrystal suspension to partially or completely recover the cholesteric structures lost during deposition and spreading; drying the deposited nanocrystal suspension so that the nanocrystals self-assemble to form a structurally coloured film; and annealing the structurally coloured film to increase the water resistance of the film. The structurally coloured film comprises nanocrystals which are organized into chiral nematic structures to provide the structural colour.

Method for preparing structurally coloured films and pigments

The invention relates to a method for producing structurally coloured films, particles and interference pigments comprising cellulose nanocrystals, such as neutralised cellulose nanocrystals. The films and particles can be used as interference pigments or coloured particles such as glitters for various applications. The method comprises steps of depositing a nanocrystal suspension comprising cellulose nanocrystals onto a substrate: spreading the nanocrystal suspension across the substrate using a spreader: ageing the nanocrystal suspension to partially or completely recover the cholesteric structures lost during deposition and spreading: drying the deposited nanocrystal suspension so that the nanocrystals self-assemble to form a structurally coloured film: and annealing the structurally coloured film to increase the water resistance of the film. The structurally coloured film comprises nanocrystals which are organized into chiral nematic structures to provide the structural colour.

Method for preparing structurally coloured films and pigments

The invention relates to a method for producing structurally coloured films, particles and interference pigments comprising cellulose nanocrystals, such as neutralised cellulose nanocrystals. The films and particles can be used as interference pigments or coloured particles such as glitters for various applications. The method comprises steps of depositing a nanocrystal suspension comprising cellulose nanocrystals onto a substrate; spreading the nanocrystal suspension across the substrate using a spreader; ageing the nanocrystal suspension to partially or completely recover the cholesteric structures lost during deposition and spreading; drying the deposited nanocrystal suspension so that the nanocrystals self-assemble to form a structurally coloured film; and annealing the structurally coloured film to increase the water resistance of the film. The structurally coloured film comprises nanocrystals which are organized into chiral nematic structures to provide the structural colour.

Multi-layered cellulose films and particles

The invention provides a multi-layered cellulose film, a multi-layered cellulose particle, methods of preparing the multi-layered cellulose film and particle, and uses of the multi-layered cellulose film and particle, and derivates thereof. Particularly, the method includes a cholesteric layer formation step comprising the steps of a) depositing a nanocrystal suspension comprising cellulose nanocrystals onto a substrate; b) spreading the nanocrystal suspension across the substrate using a spreader; c) ageing the nanocrystal suspension to partially or completely recover the cholesteric structures lost during deposition and spreading; and d) drying the deposited nanocrystal suspension so that the nanocrystals self-assemble to form a cholesteric layer. The cholesteric layer formation step is repeated two or more times and the multi-layered film comprises the cholesteric layer in direct contact with another cellulose containing layer.

Multi-layered cellulose films and particles

A nano-crystalline suspension of cellulose is deposited onto and spread over a substrate. The coating is aged, allowing it to recover cholesteric liquid crystal structure (Ch-CNC) before it is dried. This is repeated at least twice, with the chiral nematic cellulose layer (Ch-CNC) in direct contact with another cellulose containing layer, preferably a nematic cellulose layer (N-CNC). The preferred cholesteric suspension is sonicated dispersion containing 1.5-12 wt.% cellulose and spread at a shear rate of 0.5-30 s-1. The preferred nematic suspension contains 4-60 wt.% cellulose and spread at a shear rate of 5-300 s-1. The thicknesses and reflectance wavelengths are specified.