EP2619251A1 - Lignine thermoplastique pour la fabrication de fibres de carbone - Google Patents

Lignine thermoplastique pour la fabrication de fibres de carbone

Info

Publication number
EP2619251A1
EP2619251A1 EP11752554.3A EP11752554A EP2619251A1 EP 2619251 A1 EP2619251 A1 EP 2619251A1 EP 11752554 A EP11752554 A EP 11752554A EP 2619251 A1 EP2619251 A1 EP 2619251A1
Authority
EP
European Patent Office
Prior art keywords
lignin
fiber
fusible
range
precursor fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11752554.3A
Other languages
German (de)
English (en)
Inventor
Bernd Wohlmann
Michael WÖLKI
Silke STÜSGEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Carbon Europe GmbH
Original Assignee
Toho Tenax Europe GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toho Tenax Europe GmbH filed Critical Toho Tenax Europe GmbH
Priority to EP11752554.3A priority Critical patent/EP2619251A1/fr
Publication of EP2619251A1 publication Critical patent/EP2619251A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07G—COMPOUNDS OF UNKNOWN CONSTITUTION
    • C07G1/00—Lignin; Lignin derivatives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
    • C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
    • D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
    • D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
    • D01F9/16—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate
    • D01F9/17—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate from lignin

Definitions

  • the invention relates to a thermoplastic, fusible lignin, which is suitable for the production of carbon fibers.
  • Lignin is the second most popular polymer in the group of renewable raw materials after cellulose. Lignin accumulates in large quantities in the paper and pulp industry. Lignin is a by-product of processes that industrially isolate cellulose from lignocellulosic materials.
  • the lignins which occur in nature and are chemically bound to cellulose, are usually referred to as "proto-lignins". These proto-lignins are complex substances with a nonuniform polymer structure consisting of repeating basic building blocks such as cumaryl, sinapyl and coniferyl alcohol.
  • softwood such as pine, larch, spruce, pine, etc.
  • hardwoods such as willow, poplar Lime, beech, oak, ash, eucalyptus, etc.
  • annual plants such as straw or bagasse in question.
  • the cellulose fibers can be isolated.
  • the dissolved lignin remains in solution.
  • sulfate process also known as Kraft process.
  • the lignin degradation takes place by hydrogen sulfide ions (HS " ) in a basic medium at about pH 13 through the use of sodium sulfide (Na 2 S) and sodium hydroxide (NaOH) or sodium hydroxide solution
  • the waste liquor of this process also known as black liquor, contains about 45% of its solid substance when using softwoods and about 38% of hardwood or lignin with hardwoods.
  • LignoBoost One way of recovering lignin from the black liquor of the Kraft process is the so-called LignoBoost technology, in which lignin is recovered by precipitation and filtration from the black liquor. In this process, the pH is lowered to precipitate the lignin by injecting CO2.
  • LignoBoost so-called LignoBoost technology
  • lignocellulosic materials after pretreatment with eg Na 2 S0 3 , NaHC0 3 and Na 2 C0 3 at high temperatures in the range of 170 to 250 ° C and below Pressure is hydrolytically split with superheated steam for a relatively short time, followed by an explosive one
  • Another alternative is the cellulose digestion in the sulfite process, in which the lignin degradation is carried out by a sulfonation.
  • lignosulfonic acid As a chemically not exactly defined reaction product of lignin with sulfurous acid is formed lignosulfonic acid. Calcium salts of lignosulfonic acid are formed by digesting the wood with calcium hydrogensulfite solutions.
  • the waste liquor contains in its solid substance in the use of coniferous wood about 55% and at
  • Hardwoods about 42% in the form of lignosulfonic acid. As mentioned, this leaching process does not produce lignin but lignosulfonic acid or its salt.
  • the processes required to recover and isolate the lignin, depending on the digestion process, such as e.g. an acidic precipitate from the black liquor has an influence on the properties of the lignin obtained, e.g. on the purity, the structural uniformity, the molecular weight or the molecular weight distribution.
  • lignins obtained after digestion have a pronounced heterogeneity with respect to their structure.
  • Lignin as a byproduct of cellulose production has had limited commercial benefits so far and is mostly disposed of as waste or incinerated for energy.
  • Various attempts are made to produce usable products from lignin For example, US 3 519 describes 581 the preparation of synthetic lignin polyisocyanate resins by reaction of alkali lignins with organic polyisocyanates.
  • US 3,905,926 discloses lignin derivatives containing polymerizable oxirane groups. The lignin derivatives disclosed in this document can be polymerized and used for various industrial applications.
  • DE 100 57 910 A1 describes a
  • the derivatization is carried out by reacting the technical lignin with a spacer having at least one functional, nucleophilic group.
  • the refined lignin obtained in this way can be obtained, for example, by injection molding or
  • lignin u.a. for the production of fibers and in particular of carbon fibers.
  • US Pat. No. 5,344,921 describes a process for producing a modified lignin which can be spun into carbon fibers.
  • the modified lignin is obtained by reacting lignin with a phenol to give a phenolated lignin.
  • the phenolated lignin is further heated under a non-oxidizing atmosphere, whereby polycondensation of the phenolated lignin occurs, resulting in an increase in the viscosity of the lignin solution, and a lignin suitable for spinning is obtained.
  • Lignin derivatives in which the free hydroxyl groups of the starting lignin are derivatized with monovalent and divalent radicals.
  • the thus derivatized lignin can be spun into fibers which are prepared by conventional methods in
  • non-thermoplastic stabilized fibers and in a further step to
  • US Pat. No. 3,461,082 discloses a process for producing carbon fibers in which a lignin fiber is spun by dry or wet spinning from a solution of alkali lignin, thiolignin or lignin sulphonate with the addition of relatively large amounts of polyvinyl alcohol, polyacrylonitrile or viscose and subsequently to a sufficiently high level Temperature is heated above 400 ° C, so that a graphitization of lignin fiber occurs.
  • DE 2,118,488 also discloses a process for producing lignin fibers and carbon fibers obtainable therefrom by carbonization and optionally graphitization, in which the lignin fibers are spun from solutions.
  • the spinning solutions are aqueous solutions of lignosulphonic acid or its salts, which in addition to the
  • Ligninkomponente in proportions to 2 wt .-% contains high molecular weight components, namely polyethylene glycol or acrylic acid acrylamide with a
  • US 2008/0317661 A1 relates to a process for the production of
  • lignin acetate is extruded into a lignin fiber and the resulting fiber is subsequently thermally stabilized.
  • the thermally stabilized softwood lignin acetate fiber is then subjected to carbonization.
  • Production of carbon fibers from lignin is based on chemically modified or derivatized lignins and / or use lignin solutions or solutions of lignin derivatives for the production of fibers. If one
  • Fiber production based on lignin raw materials from the melt is the addition of significant amounts of additives or solvent components required so as to obtain a mixture which is melt-processable and thread-forming via a melt.
  • the known methods are complicated in terms of process control.
  • the known methods are complicated in terms of process control.
  • Derivatizations and / or the additives adversely affect the stabilization of the spun fibers based on lignin raw materials and the subsequent carbonization to carbon fibers.
  • Carbon fibers are suitable.
  • the present invention therefore relates to a fusible lignin, which
  • a glass transition temperature in the range between 90 and 160 ° C determined by dynamic difference calorimetry (DSC) according to DIN 53765-1994,
  • lignin from hardwoods such as B. beech, oak, ash or eucalyptus or conifers, such as pine, larch spruce, etc. (Softwood lignin) are used.
  • the lignins can be different
  • the lignins can be obtained via sulfate processes, also known as kraft processes, also in combination with the LignoBoost process, the soda AQ, the Organosolv process or the steam explosion process.
  • sulfate processes also known as kraft processes
  • LignoBoost process the soda AQ
  • Organosolv process the Organosolv process
  • steam explosion process not as a lignin in the
  • lignin sulfonates are to be understood, as obtained, for example, in sulfite processes.
  • lignin and partly relatively volatile degradation products of lignin such as Cumaryl, coniferyl and Sinapinalkohol, their derivatives, such as the syringa or guaiacyl aldehyde, syringol, guaiacol; short chain condensation products, such as esters, ethers or hemiacetals, and degradation products of the lignocellulosic material, such as
  • lignin in the context of the present invention is understood to mean a lignin which is obtained as the product from the abovementioned digestion processes. This lignin is also called free lignin.
  • lignin does not include lignin salts, e.g. Lignosulfonates, as obtained in sulfite processes.
  • lignin in the sense of the present invention does not include lignin derivatives in which lignins have been modified by chemical reactions on the lignin, e.g. via acetylation, acylation, esterification, etc., or e.g. by reaction with
  • the lignin according to the invention can be prepared from the lignins digested by methods such as Kraft, the soda AQ or the Organosolv method by extraction with suitable solvents or by fractionation by means of a mechanical separation process, which also includes ultrafiltration or
  • Nanofiltration membrane processes include, are obtained.
  • the solvents to be used in an extraction with solvents depend on the
  • composition of the fractions depends on the particular starting lignin, ie, for example, whether it is a hardwood or a coniferous lignin. It is also possible to use suitable fractions of hardwood lignin and
  • the fusible lignin according to the invention has a glass transition temperature T G in the range between 90 and 160 ° C. At the same time, they have a molecular weight distribution or molecular weight distribution with a dispersivity of less than 28.
  • T G glass transition temperature
  • portions of very high molecular weight lignins are disruptive to the spinning process. Thus, in melt spinning processes with increasingly high molecular weight fraction in the lignin spinning fracture is observed, possibly caused by unmelted areas, ie by inhomogeneities in the melt.
  • too high a content of low-molecular constituents in the melt may indeed improve the spinnability, but lead to a strong reduction of the glass transition temperature of the lignin and thus to
  • the glass transition temperature is in the range between 1 10 and 150 ° C. It is also preferred if the dispersity of the molecular weight distribution is less than 15, and more preferably if it is less than 8.
  • the molecular weight distribution is determined in the context of the present invention by means of gel permeation chromatography (GPC) on pullulan standards of sulfonated polystyrene with dimethyl sulfoxide (DMSO) / 0.1 M LiBr as eluent and at a flow rate of 1 ml / min.
  • the sample concentration is 2 mg / ml, the injection volume 100 pm.
  • the oven temperature is set to 80 ° C, the detection was carried out with UV light of a wavelength of 280 nm.
  • Molar mass distribution are determined by conventional methods, the number average M N and the weight average M w of the molecular weight distribution. The dispersivity then results as the ratio of the weight average M w to the number average M N , M W / M N.
  • the molecular weight distribution is preferably monomodal.
  • the lignin of the present invention it has been found that it may be unfavorable with respect to the spinnability of the lignin when the lignin is e.g. is composed of two fractions with widely different average molecular weight and narrow molecular weight distribution. Here it can happen that the fractions at different temperatures
  • the lignin of the invention should therefore preferably to a
  • the molecular weight distribution of the lignin according to the invention is monomodal. Particularly preferred is a monomodal molecular weight distribution, which also has no shoulder.
  • Ingredients which include, for example, hemicelluloses, short-chain
  • the lignin according to the invention therefore has a proportion of volatile constituents, determined on the basis of
  • thermal aftertreatment the lignin is exposed to a temperature of 180 ° C under vacuum for 2 h.
  • separation processes may also be carried out by ultrafiltration or nanofiltration membranes, e.g. in the form of ceramic membranes.
  • the lignin according to the invention therefore has an ash content, determined in accordance with DIN EN ISO 3451 -1, of less than 1% by weight.
  • an ash content of less than 0.2 wt .-% and particularly preferably less than 0, 1 wt .-%.
  • the adjustment of the required ash content can be achieved, for example, by washing the lignin with acids such as hydrochloric acid and then with deionized water. Alternatively, a cleaning, for example by means of ion exchange is possible.
  • the lignin of the invention is fusible and has thermoplastic
  • a molded article comprising the lignin of the present invention is also part of the present invention.
  • Such shaped bodies can be made from the lignin according to the invention
  • Processing methods such as e.g. Kneading, extruding, melt spinning or injection molding at temperatures ranging from 30 ° C to 250 ° C and may be of any shape, e.g. the shape of films, membranes, fibers, etc .. In the range of higher processing temperatures of preferably about 150 ° C to 250 ° C, the processing of the
  • Lignins according to the invention are carried out to the molding under an inert gas atmosphere.
  • the fiber of the invention is a multifilament yarn.
  • this fiber is a precursor fiber for carbon fibers, i. to a fiber, which as
  • Such a carbon fiber precursor fiber is produced according to one aspect of the present invention by a process comprising the following steps:
  • the lignin fiber is one consisting of a multiplicity of filaments
  • Multifilament yarn in which the diameter of the filaments is in the range of 5 to 100 ⁇ m, and more preferably in the range of 10 to 60 ⁇ m.
  • the lignin fiber is subjected to drawing after exiting the spinneret.
  • the invention further relates to a method for producing a
  • Carbon fiber comprising the steps of:
  • Precursorfasern for carbon fibers is generally the conversion of the fibers via chemical stabilization reactions, in particular cyclization and dehydrogenation reactions of a
  • thermoplastic state in an oxidized, infusible and flame-resistant state is understood thermoplastic state in an oxidized, infusible and flame-resistant state.
  • the stabilization is carried out today usually in conventional convection ovens at temperatures between 150 and 400 ° C, preferably between 180 and 300 ° C, in a suitable process gas (see, for example, F. Fourne: "Synthetic fibers", Carl Hanser Verlag Kunststoff Vienna 1995, Chapter 5.7).
  • a stepwise reaction takes place via an exothermic reaction
  • Inertgasatmospreheat preferably under nitrogen.
  • the carbonation can be carried out in one or more stages.
  • the stabilized fiber is heated at a heating rate which is in the range of 10 K / s to 1 K / min, preferably in the range of 5 K / s to 1 K / min.
  • the carbonation takes place at a temperature between 400 and 2000 ° C
  • the carbonization end temperature is up to 1800 ° C.
  • the carbonization process step converts the stabilized precursor fiber of the invention into a carbonized fiber of the invention, i. into a fiber whose fiber-forming material
  • the carbonized fiber according to the invention can be further refined in the process step of graphitization.
  • the graphitization can be carried out in one stage, wherein the carbonized fiber according to the invention in an atmosphere consisting of a monatomic inert gas, preferably of argon, at a heating rate in the range of preferably 5 K / s to 1 K / min to a temperature of for example heated up to 3000 ° C.
  • the process step of graphitization converts the carbonized fiber of the present invention into a graphitized fiber of the present invention.
  • Carrying out the graphitization while stretching the carbonized fiber according to the invention leads to a significant increase in the modulus of elasticity of the resulting graphitized fiber according to the invention. Therefore, the graphitization of the carbonized fiber of the present invention is preferably carried out while simultaneously stretching the fiber.
  • Hardwood lignin (eucalyptus) used.
  • the lignin had one
  • the lignin was examined for its spinnability by means of a standard spinning test machine (type LME, SDL Atlas). Although the lignin could be melted at temperatures above 170 ° C, it could not be spun into fibers.
  • the starting lignin was heated under vacuum of less than 100 mbar for 2 hours at 180 ° C.
  • the post-treated lignin had a glass transition temperature T G of 130 ° C, an average molecular weight M w of 3070 g / mol, a molecular weight distribution with a dispersivity of 10.8 and an ash content of 0.33 wt .-%.
  • the proportion of volatile constituents of the aftertreated lignin was below 1% by weight.
  • the lignin was examined for its spinnability by means of a standard spinning test machine (LME type, SDL Atlas), with a rotor temperature of 185 ° C. and a spinning head temperature of 200 ° C. being set on the spinning test machine. The spinning speed was 1 14 m / min. From the aftertreated lignin were so monofilaments with a
  • This beechwood lignin was subjected to a spinning test. No monofilaments could be produced, a stable spinning process was not achieved.
  • the lignin of Comparative Example 2 was subjected to purification and fractionation, ie, separation of high molecular weight components.
  • the lignin was dissolved in a solvent in the ratio 1:10 over 30 min with constant stirring.
  • the solvent used was a 20:80 propanol / dichloromethane mixture.
  • the solution was filtered under vacuum through a filter (S & S type 595, 4-7 pm, Schleicher s Schull) to separate insoluble matter. Subsequently, the solvent was removed via a rotary evaporator.
  • the thus purified and fractionated lignin was then subjected to a thermal aftertreatment under vacuum of less than 100 mbar and with heating for 2 hours at 180 ° C.
  • the thermally treated lignin had a glass transition temperature T G of 142 ° C, an average molecular weight M w of 9970 g / mol and a dispersity of the molecular weight distribution of 27.5.
  • the proportion of volatile constituents was 0.58 wt .-%, the ash content was below 0.2 wt .-%.
  • the thus prepared lignin was spun by means of a standard spinning test machine (type LME, SDL Atlas) to monofilaments usable as precursor fibers with a filament diameter of 87 pm.
  • a rotor temperature 180 ° C and a.
  • the purified and fractionated lignin had a glass transition temperature T G of 132 ° C, an average molecular weight M w of 1902 g / mol, a
  • the purified lignin was used to remove volatiles
  • thermal aftertreatment under vacuum of less than 100 mbar and under heating for 2 hrs.
  • T G glass transition temperature
  • dispersivity of the molecular weight distribution of 2.3
  • a volatile content 0.71 wt .-%.
  • the ash content was also below 0.2% by weight.
  • the lignin prepared in this way could be used as a precursor fiber by means of a standard spinning test machine (type LME, SDL Atlas)
  • a rotor temperature of 185 ° C. and a spinning head temperature of 195 ° C. were set on the spinning test machine.
  • the lignin taken from the LignoBoost process had a glass transition temperature T G of 173 ° C, an average molecular weight M w of 7170 g / mol and a molecular weight distribution with a dispersivity of 17.6.
  • the content of volatile constituents was above 2.0% by weight.
  • the starting material was first subjected to purification and fractionation, proceeding as in Example 3.
  • the purified lignin was also subjected to a thermal aftertreatment under vacuum of less than 100 mbar and with heating for 2 hours at 180 ° C. to remove volatile constituents.
  • the thus treated lignin had a glass transition temperature T G of 1 18 ° C, a dispersivity of
  • the starting material was first subjected to purification and fractionation as described in Example 2, with methanol being used as solvent unlike Example 2.
  • the thus prepared lignin was
  • the lignin had a glass transition temperature T G of 145 ° C, a dispersivity of the molecular weight distribution of 10.3 and a volatiles content of less than 0.3 wt .-%.
  • the ash content was below 0.7% by weight.
  • the lignin could easily be spun into monofilaments in a spinning test.
  • a rotor temperature 180 ° C and a Spinner head temperature of 210 ° C and a spinning speed of 1 14 m / min set.
  • the thermally treated lignin had a glass transition temperature T G of 132 ° C, an average molecular weight M w of 6640 g / mol and a dispersity of the molecular weight distribution of 18.7.
  • the proportion of volatile constituents was 0.75 wt .-%, the ash content was below 0.05 wt .-%.
  • the spinning test produced monofilaments with filament diameters in the range of 21-43 ⁇ m.
  • the spinning test machine was set at a rotor temperature of 180 ° C., a spinning head temperature of 195 ° C. and a spinning speed of 91 m / min.
  • the softwood lignin had a dispersivity of 2.61, an ash content of 4.08 wt%, and a volatiles content of 2.5 wt%. This softwood lignin could not be spun into threads in the spinning test machine.
  • a lignin obtained from annual plants was obtained, which was obtained by a soda process.
  • the lignin from annual plants had a glass transition temperature T G of 155 ° C, an average molecular weight M w of 2435 g / mol, a dispersivity of 2.35, an ash content of 1.29 wt .-% and a volatile content of 2 , 6 wt .-%.
  • Example 2 The monofilament obtained in Example 2 was used under
  • the monofilaments obtained were subjected to a thermal treatment under an air atmosphere in an oven without tension, the oven temperature being raised from 25 ° C to 170 ° C at 2 ° C / min and from 170 ° C to 250 ° C at 0.2 ° C / min. After reaching 250 ° C oven temperature, the monofilament was further treated for 4 hrs at 250 ° C.
  • Example 8a the
  • Example 8b Monofilament for 4 hours at 250 ° C further treated.
  • the oven temperature was increased from 25 ° C to 170 ° C at 2 ° C / min and then from 170 ° C to 300 ° C at 0.2 ° C / min. After reaching 300 ° C oven temperature, the monofilament was further treated for 2 hours at 300 ° C.
  • Precursorfaser had a density of 1.409 g / cm 3 , a tensile strength of
  • Precursor fiber had a density of 1.559 g / cm 3 , a tensile strength of
  • Example 9a Air exposure of an oxidation treatment for producing a stabilized Precursor Anlagen subjected.
  • Example 8a Air exposure of an oxidation treatment for producing a stabilized Precursor Anlagen subjected.
  • Example 8a Air exposure of an oxidation treatment for producing a stabilized Precursor Anlagen subjected.
  • Example 9b Air exposure of an oxidation treatment for producing a stabilized Precursor Anlagen subjected.
  • Precursor fiber had a density of 1.414 g / cm 3 , a tensile strength of 1 18.6 MPa and an elongation of 6.9%.
  • Precursorfaser had a density of 1, 531 g / cm 3 , a tensile strength of
  • Example 10a Air exposure of an oxidation treatment for producing a stabilized Precursor Anlagen subjected.
  • Example 8a Air exposure of an oxidation treatment for producing a stabilized Precursor Anlagen subjected.
  • Example 8a Air exposure of an oxidation treatment for producing a stabilized Precursor Anlagen subjected.
  • Example 8b Air exposure of an oxidation treatment for producing a stabilized Precursor Anlagen subjected.
  • Example 8b Air exposure of an oxidation treatment for producing a stabilized Precursortura subjected.
  • Example 8a and Example 10b were also set in Example 8b
  • Precursor fiber had a density of 1, 425 g / cm 3 , a tensile strength of 129 MPa and an elongation of 4.8%.
  • the stabilized precursor fiber resulting from the application of the process conditions according to example 10b had a density of 1.448 g / cm 3 , a tensile strength of 213 MPa and an elongation of 5.0%.
  • a stabilized precursor fiber produced according to Example 8b was used.
  • a section of the stabilized precursor fiber was in a
  • Carbonizing furnace fixed at its ends and held under a tension of 0.5 cN.
  • the carbonization furnace with the fiber section was first purged with nitrogen for 1 h. After rinsing, the carbonator was heated from 25 ° C to 800 ° C at 3 ° C / min. This was the stabilized
  • Precursor fiber carbonized under a nitrogen atmosphere.
  • the carbon fiber had a tensile strength of 599 MPa and an elongation at break of 1.1%.
  • a stabilized precursor fiber produced according to Example 10b was used.
  • the carbonization of the stabilized precursor fiber was carried out as in Example 1 1.
  • the result was a carbon fiber with a density of 1, 502 g / cm 3 , with a tensile strength of 331 MPa and obtained with an elongation at break of 0.7%.
  • the carbon content in the fiber was well above 70% by weight.

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  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Fibers (AREA)
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Abstract

L'invention concerne une lignine fusible, qui présente une température de transition vitreuse calculée par calorimétrie à balayage différentiel (DSC) dans la plage comprise entre 90 et 160 °C, une distribution des masses molaires calculée par chromatographie par perméation de gel (GPC) avec une dispersivité inférieure à 28, une teneur en cendres inférieure à 1 % en poids et une proportion de constituants volatils d'au plus 1 % en poids. L'invention concerne également une fibre de précurseur à base de la lignine fusible selon l'invention et son procédé de fabrication. L'invention concerne enfin également un procédé de fabrication d'une fibre de carbone à partir de la fibre de précurseur selon l'invention.
EP11752554.3A 2010-09-23 2011-09-08 Lignine thermoplastique pour la fabrication de fibres de carbone Withdrawn EP2619251A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11752554.3A EP2619251A1 (fr) 2010-09-23 2011-09-08 Lignine thermoplastique pour la fabrication de fibres de carbone

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10178760 2010-09-23
PCT/EP2011/065513 WO2012038259A1 (fr) 2010-09-23 2011-09-08 Lignine thermoplastique pour la fabrication de fibres de carbone
EP11752554.3A EP2619251A1 (fr) 2010-09-23 2011-09-08 Lignine thermoplastique pour la fabrication de fibres de carbone

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EP2619251A1 true EP2619251A1 (fr) 2013-07-31

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US (1) US20130183227A1 (fr)
EP (1) EP2619251A1 (fr)
JP (1) JP2013542276A (fr)
KR (1) KR20130117776A (fr)
CN (1) CN103140539A (fr)
AR (1) AR083086A1 (fr)
AU (1) AU2011304512A1 (fr)
BR (1) BR112013006492A2 (fr)
CA (1) CA2812685A1 (fr)
TW (1) TW201219457A (fr)
WO (1) WO2012038259A1 (fr)

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RU2591939C2 (ru) 2011-02-14 2016-07-20 Иннвентиа Аб Способ изготовления лигнинового волокна
US9512495B2 (en) 2011-04-07 2016-12-06 Virdia, Inc. Lignocellulose conversion processes and products
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AU2011304512A1 (en) 2013-04-11
WO2012038259A1 (fr) 2012-03-29
AR083086A1 (es) 2013-01-30
KR20130117776A (ko) 2013-10-28
JP2013542276A (ja) 2013-11-21
US20130183227A1 (en) 2013-07-18
CN103140539A (zh) 2013-06-05
TW201219457A (en) 2012-05-16

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