WO2013098203A2 - Corps façonné renforcé par une structure textile, son procédé de production et son utilisation - Google Patents

Corps façonné renforcé par une structure textile, son procédé de production et son utilisation Download PDF

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Publication number
WO2013098203A2
WO2013098203A2 PCT/EP2012/076460 EP2012076460W WO2013098203A2 WO 2013098203 A2 WO2013098203 A2 WO 2013098203A2 EP 2012076460 W EP2012076460 W EP 2012076460W WO 2013098203 A2 WO2013098203 A2 WO 2013098203A2
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WO
WIPO (PCT)
Prior art keywords
fibers
cellulose
shaped body
body according
radical
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PCT/EP2012/076460
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German (de)
English (en)
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WO2013098203A3 (fr
Inventor
Frank Hermanutz
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Deutsche Institute Für Textil- Und Faserforschung Denkendorf
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Publication of WO2013098203A2 publication Critical patent/WO2013098203A2/fr
Publication of WO2013098203A3 publication Critical patent/WO2013098203A3/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
    • C08J3/09—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids
    • C08J3/091—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids characterised by the chemical constitution of the organic liquid
    • C08J3/096—Nitrogen containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/045—Reinforcing macromolecular compounds with loose or coherent fibrous material with vegetable or animal fibrous material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2301/02—Cellulose; Modified cellulose

Definitions

  • the invention relates to a molded article or a composite material with an organic matrix, which is reinforced with textile structures, including fibers, a method for producing such a shaped article and its possible uses.
  • the shaped body according to the invention is a composite material.
  • composite materials are gaining in importance due to their outstanding specific properties, especially for lightweight applications.
  • the use of organic materials, in particular of a thermoplastic nature, and of renewable raw materials leads to particular advantages with regard to recycling or availability, price and acceptance of the components of the composite materials.
  • composite plates are produced in which a thermo-elastic cellulose acetate matrix is reinforced unidirectionally with viscose tire cord continuous fibers. This is done by a two-stage prepreg process wherein the reinforcing fibers are impregnated with the matrix. Thereafter, the resulting prepregs are compacted under heat and the fiber content adjusted to about 30 vol .-% (see M. Horvath, "fiber composites with thermoplastic matrix based on renewable raw materials", dissertation.de, published on the Internet, 2001, p / 14).
  • the products obtained by the above process show various advantages, such as a reduction in the thermal expansion of the addressed matrix, a advantageous adhesion between viscose tire cord fibers and the cellulose acetate matrix, which was investigated and confirmed inter alia by scanning electron micrographs of fractures.
  • Advantageous mechanical parameters are set (modulus of elasticity, tensile strength, flexural modulus), which are significantly improved over those of the pure matrix.
  • the thermal properties of the composite materials described are superior to those of the pure matrix.
  • the average coefficient of thermal expansion between -10 and + 30 ° C is significantly smaller in the composite materials than in the matrix.
  • WO 96/36666 describes moldings of a composite material based on cellulose acetate and reinforcing cellulose-containing fibers which correspond to those described above.
  • the core idea of these known shaped bodies is that the cellulose acetate has a degree of substitution (DS) of about 1.2 to 2.7 and the molding has a Vicat temperature of at least about 160 ° C and the mass ratio of cellulose acetate to natural cellulose fibers or cellulose fibers natural cellulosic fibers is about 10:90 to 90:10.
  • NFK natural fiber reinforced plastics
  • these composites are made of a plastic that maintains its stability by incorporating natural fibers.
  • Components made of NFK not only have high rigidity and strength, but also a low density and are already economically competitive today.
  • the German automotive industry used approximately 45,000 tons of NFK primarily in the passenger compartment, such as interior linings, hat racks, boot linings, spare wheel wells and pillar trim right up to the dashboard.
  • first components z. B. produced as underbody protection on the basis of NFK in series.
  • the natural fibers are particularly based on flax, hemp, jute, kenaf, sisal or abaca.
  • the natural fiber reinforced composites based on thermoplastics have many advantages as mentioned above. In addition, they are up to 30% lighter than conventional fiber composites, do not splinter and break without sharp edges. In general, production costs are low, although a molded part is more expensive to produce than a part made of pure plastic.
  • the invention was based on the object, the above-described prior art, in particular that shown in the introduction, namely a molded body with an organic matrix, which is reinforced with textile structures, including fibers, so educate that its disadvantages, but the latter Advantages to be maintained.
  • a varietal, compostable composite material or molded body of the type described should be able to be provided.
  • the adhesion between the reinforcing textile structures and the matrix is to be improved.
  • this object is achieved by a shaped body having an organic matrix which is reinforced with textile structures, including fibers, in that the matrix is based on cellulose.
  • the cellulose source can be of a variety of types. So it may be cellulose of natural origin, such as cotton, linters, hemp, flax, etc., but also to a chemical or paper pulp.
  • the degree of polymerization (DP) of the respective cellulose is between 108 and 5500, in particular between 250 and 2000. If the value falls below 200, the matrix properties are adversely affected, while if the value of 5500 is exceeded, the production, which will be described in detail below, is made more difficult.
  • the term "textile structure” is to be understood in the context of the invention in general. These may be, for example, pure fibers or filaments, but also structures which are based on the pure fibers or filaments, wherein the fibers or filaments can be ordered or also disposed of in an unordered manner. Thus, for example, they can be arranged in one direction or randomly in the shaped body according to the invention. If they are included unidirectionally, then this leads to an amplification effect in the fiber direction.
  • the textile structures are preferably in the form of endless fibers (filaments), short fibers or staple fibers, yarns and / or as textile fabrics. It is advantageous if the textile fabrics are in the form of woven, knitted, knitted, braided, laid, wound or nonwoven fabric.
  • both natural fibers and synthetic fibers are suitable for the fibers within the scope of the invention.
  • the selection depends on certain aspects of the application in the composite material.
  • the natural fibers lead to a single-formed molding. If special strength properties are to be sought, then it makes sense in individual cases to use chemical fibers in the form of high-performance fibers, such as aramids or else carbon fibers and the like.
  • the natural fibers of seed fibers especially of cotton, bast fibers, in particular of flax, hemp, jute, kinap, ramie, abaca, rosenna and / or uran
  • hard fibers in particular of alpha or Espatogras, Fique, Henequen, coconut, Manila, porphium and / or glisal
  • animal fibers in particular of wool or fine and coarse animal hair, wood fibers, leaf fibers and / or silk represent.
  • the mentioned man-made fibers in particular based on modified natural materials of plant origin, and in particular represent: copper silk fibers, viscose fibers, modal fibers, rayon and cellulose acetate fibers, in particular as acetate or triacetate, alginate fibers, polyisoprene fibers or synthetic fibers, in particular elastofibres, fluorofibres, polyacrylic fibers, in particular based on polyacrylonitrile, or modacrylic, polyamide fibers, in particular nylon or aramid fibers, polychloride fibers, in particular based on polyvinyl chloride and polyvinylidene chloride, polyester fibers, polyolefin fibers, in particular based on polyethylene and polypropylene , or polyvinyl alcohol fibers.
  • inorganic chemical fibers in particular based on glass or ceramic, and carbon fibers or metal fibers are used for the purpose of the invention.
  • carbon fibers or metal fibers are used for the purpose of the invention.
  • modified fibers in particular modified natural fibers.
  • fibrillated natural fibers z. B. produce very stable composites.
  • double characteristic values are achieved, which correspond to those of glass fiber reinforced parts.
  • the fibrillation can be carried out mechanically, physically-chemically or else enzymatically.
  • the degree of fineness of the individual fibers selected according to the invention is 0, 1 dtex to 15 dtex, in particular 0.3 to 6 dtex.
  • the proportion of fibers is in the molding preferably between 10 and 90 wt .-%, in particular between 20 and 75 wt. %. Particularly ideal here is the weight percent range of 40 to 65 wt .-% to designate. The maximum value must indicate that exceeding may adversely affect the adhesion (interlaminar shear strength).
  • the molded body obtained according to the invention is distinguished by a variety of advantageous physical characteristics, which are very satisfactory compared with the products of the prior art used for comparison, but with the above-mentioned disadvantages, such as by a flexural strength (according to ASTM D 790-97) of 500 to 10,000 [MPa], in particular from about 1000 to 5000 [MPa], and / or a tensile strength (according to DIN ISO 527-1) of 175 to 20,000 [MPa], especially from about 1000 to 20,000 [MPa], especially preferably from 2500 to 10000 [MPa], and / or an interlaminar shear strength of from 25 to 2000 [MPa], in particular from 50 to 1000 [MPa] (measured according to ASTM D 2344-84, Short Beam Test) and / or an E Module (according to DIN ISO 527-1) of 1000 to 20000 [MPa], in particular from about 2500 to 10000 [MPa].
  • This list of advantageous physical characteristics of the molding according to the invention is not restrictive.
  • the matrix consists solely of cellulose.
  • additives are in particular in the form of mineral materials, in particular calcium carbonate, calcium sulfate, silicon dioxide and / or aluminum silicate, microcapsules, pore formers, plasticizers, matting agents, flame retardants, bactericides, crosslinking agents, water repellents, antistatic agents and / or colorants, in particular pigments.
  • polymer additives onto the shaped body based on an organic matrix according to the invention.
  • polymer additives which, like the cellulose included according to the invention, can be dissolved in the ionic liquids in question. They should be compatible with the cellulose in this solution and should not interfere with downstream measures. This can be expertly determined easily and easily.
  • Polymers could be mentioned polyethers, such as polyalkylene glycols or polyalkylene oxides, polyesters, such as polyethylene terephthalate or polybutylene terephthalate, cellulose esters, such as cellulose acetate, cellulose butyrate, cellulose propionate, triacetate or cellulose carbamate, cellulose alginate, polyamides, polyimides, polyacrylonitriles, polyaramides, polyurethanes , Polyacrylates such as polyacrylic acid, polyolefins, polyvinyl chloride, polyvinylidene chloride and polyvinyl alcohols.
  • polyethers such as polyalkylene glycols or polyalkylene oxides
  • polyesters such as polyethylene terephthalate or polybutylene terephthalate
  • cellulose esters such as cellulose acetate, cellulose butyrate, cellulose propionate, triacetate or cellulose carbamate
  • cellulose alginate polyamides, polyimides, polyacrylon
  • the cellulose remains the main component, it being possible as a rule to indicate that the proportion of polymer additives within the molding according to the invention is not more than 30%, in particular not more than 20%, the maximum content being 10% by weight, in particular of 5% by weight is advantageously maintained.
  • the proportion of polymer additives to ensure the desired properties of the molding should be largely excluded, in particular be completely excluded.
  • the above percentages by weight relate to the total amount of polymer components (cellulose plus polymer additives).
  • the molding according to the invention is advantageously planar, and it is expedient in individual cases, to press together several sheet-like moldings according to the invention.
  • the technical success associated with the invention lies in a special production process.
  • This is characterized in that the cellulose is dissolved as pulp and / or as cellulose of natural origin in a molten ionic liquid, wherein in the resulting cellulose-containing solution system, the amount of cellulose expediently 2 to 30 wt .-%, in particular 4 to 15 wt .-%, the cellulose-containing solution system, optionally with incorporated property-improving additives, mixed with a textile structure and this mixing system for coagulating the cellulose contained in the solution system in a coagulant containing coagulation medium, in particular in an aqueous coagulation and introduced by Coagulation resulting moldings are washed and dried.
  • ionic liquids according to the general formula [Q +] n [Z] n " are used, where the cation [Q +] n is a quaternized ammonium [R 1 R 2 R 3 R 4 N +], phosphonium [R 1 R 2 R 3 R 4 P +] or sulfonium [ RlR2R3S +] cation or an analogous quaternized nitrogen, phosphorus or sulfur heteroaromatic of the following formulas I), (II), (III), (IV), (V) and (VI)
  • radicals R 1, R 2, R 3, R 4 or the radicals R 1 to R 8 in the formulas (I) to (VI) independently of one another are linear, cyclic, branched, saturated or unsaturated alkyl radicals, mono- or polycyclic, aromatic or heteroaromatic radicals or derivatives of these radicals substituted by further functional groups, where R 1, R 2, R 3 and R 4 may be linked to one another, where the anion [Z] n 'is in the form of a halide, pseudohalide, amide, in the form of phosphorus bonds or nitro compounds.
  • the alkyl radical in the form of a Ci-Ci 8 - alkyl radical in particular an alkyl radical having 1 to 4 carbon atoms, preferably ⁇ before a methyl, ethyl, 1-propyl, 2-propyl, 1- butyl, or 2-butyl group is present
  • the cyclic alkyl group is present 0 i -cycloalkyl radical, and in particular in the form of a cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl radical in the form of a C 3, the alkyl radical unsaturated in the form of a vinyl, 2 Propenyl, 3-butenyl, cis-2-butenyl, trans-2-butenyl radical is present, the aromatic radical in the form of a phenyl or naphthyl radical is present, having 1 to 3 halogen atoms, alkyl radicals having 1 to 4 Carbon atoms or pheny
  • EMIM ionic liquid
  • DCA ionic liquid
  • EMIM ethylmethylimidazolium
  • MMIM dimethylimidazolium
  • DCA dicyanamide
  • DMP dimethyl phosphate
  • DEP diethyl phosphate
  • the temperature of the molten ionic liquid is less than 160 ° C., in particular less than 130 ° C., and / or more than 20 ° C., in particular more than 30 ° C., is set. Expediently, these parameters for the temperature are maintained in the course of the process until the solution system is introduced into a coagulation medium.
  • a range of the melting point of each ionic liquid used a range of -100 ° C to + 150 ° C, in particular from -30 ° C to + 80 ° C, could be specified.
  • an initial cellulose having an average degree of polymerization of from 108 to 5500, in particular from 250 to 2000 is used to form the matrix of the body according to the invention.
  • the cellulose incorporated is not degraded substantially, but the starting cellulose and the matrix-forming cellulose of the inventive molding have a substantially same degree of polymerization, especially if the preparation of the solution of cellulose in the ionic liquid is carried out under a protective gas atmosphere, for example under a nitrogen atmosphere.
  • a protective gas atmosphere for example under a nitrogen atmosphere.
  • an oxidizing atmosphere it is possible to set the degree of polymerization of the cellulose and thus the viscosity of the solution system targeted.
  • a twin-screw extruder has proven to be particularly advantageous.
  • the dissolution is further favored by simultaneously irradiated with microwaves during mixing, in particular ultrasound comes to act.
  • the addressed solution system is set to a zero viscosity (measured with a rotational viscometer) between 2 and 1000 Pa.s, in particular between 10 and 250 Pa.s, wherein from these frames of the zero viscosity the processing of the solution system for example, in an extruder is particularly advantageous.
  • a preferred framework for the content of cellulose in the ionic liquid is a range of 2 to 30, in particular 4 to 15 wt -.% To indicate. If the value falls below 2% by weight, the solutions are too low in viscosity, while exceeding the value of 30% by weight leads to difficulties in processing because of the high solution viscosity.
  • an optimal solution system containing cellulose it is done so that the cellulose-containing solution system before mixing with the textile structures at 10 to 140 ° C, in particular at 40 to 120 ° C, and / or the coagulation medium to a Temperature of about 20 to 90 ° C, in particular 20 to 60 ° C is set.
  • the cellulose-containing solution system is filtered, this taking place in particular under pressurization and the filtered solution system is fed to the coagulation medium.
  • a particularly advantageous development is then that the filtered solution system is subsequently degassed and before it is introduced into the coagulation medium, which also takes place in particular under the action of a vacuum.
  • the invention is not subject to any relevant restrictions.
  • the coagulation medium as coagulant water, monoalcohols, especially methanol, ethanol, propanol and / or butanol, polyhydric alcohols, especially glycerol, ethylene glycol, diethylene glycol, triethylene glycol, 1,4-butanediol, 1,2-propanediol, 1,3-propanediol and / or 1,6-hexanediol, or mixtures of these coagulants.
  • the coagulating agent is used in the coagulating medium in an amount of from 5 to 95% by weight, in particular from 20 to 80% by weight.
  • the coagulation medium contains the ionic liquid present in the solution system or another ionic liquid suitable according to the invention in an amount of from 5 to 70% by weight, in particular from 10 to 30 wt .-% contains. This allows coagulation to be delayed and a compact, well-consolidated product to be obtained.
  • additives can be included in the shaped body according to the invention.
  • the above-described additives are therefore used in the process. As a result, they can already be added to the pure ionic liquid, to the cellulose-containing solution system and / or to the mixture containing the cellulose-containing solution system and the textile structures.
  • the shaped body in the coagulation medium After formation of the shaped body in the coagulation medium, this is removed therefrom. It then preferably follows a washing with water and / or a monoalcohol, in particular with methanol, ethanol, propanol and / or butanol, expediently between 20 and 80 ° C.
  • the washing or rinsing is preferably carried out with demineralized water.
  • the washing water can be pressed between two rollers. Drying in a temperature range of preferably 60 to 160 ° C, especially 80 ° C to 130 ° C, follows in a non-limiting manner.
  • the composite body can be pressed in a heating press in this temperature frame and dried under elevated pressure, for example, from 2 N / cm 2 to 16 N / cm 2 .
  • the drying can be configured in many ways. For example, drying for composite consolidation in an oven can be done at 80 to 160 ° C. In a particular embodiment, for example, composite panels are preferably pressed between rolls and dried in a hot press. After drying, a further shaping can take place in a press. The washed and dried shaped bodies obtained in the above manner can be subjected to aftertreatments, so in particular a further shaping in a heating press and / or a mechanical action, in particular a cutting, or a surface treatment or a chemical action, in particular a gluing done ,
  • the molding according to the invention is open due to the described properties of a large number of advantageous uses.
  • its use is its use as a car interior part, in particular as a roof part, sover modeu ng, door trim, Trunk lining, spare wheel well, pillar trim and dashboard, for the automotive exterior as underbody protection, as a promenade, as a noise barrier, as a railing, as windows and doors, as a window and door profile, as a window frame, as a fence system, as packaging material, as insulating material or furniture part :
  • the following properties of the shaped bodies according to the invention play a relevant role:
  • the shaped bodies are sorted and compostable. They show a special adhesion between the cellulosic matrix and the embedded cellulosic fibers. These properties exceed those of the known fiber reinforced composites based on thermoplastics.
  • the molded articles according to the invention have the advantageous properties of the fiber-reinforced composites of the prior art. They are characterized by good characteristics of flexural strength, tensile strength of the modulus of elasticity and interlaminar shear strength, which means good adhesion.
  • the particularly strong adhesion results from the fact that in carrying out the method according to the invention, a dissolution of the fibers takes place.
  • This solubilization applies not only to cellulosic fibers, but also to those chemically different types of fibers that can be dissolved or dissolved to some extent in the ionic liquid.
  • the triggering process can be specifically controlled over time and temperature.
  • a particularly advantageous development of the shaped bodies according to the invention consists in that the ionic liquid can be separated from the precipitation medium and recycled again into the overall process. Incidentally, the same applies to the cellulose matrix of the molding according to the invention, if it is consumed in its application and would have to be disposed of.
  • the advantage of the shaped bodies according to the invention is also that they are accessible to further processing by carbonization.
  • the carbonization can be carried out by conventional methods, in particular in an inert gas atmosphere.
  • the preferred temperature range 400 ° C to 3000 ° C, in particular 700 ° C to 2400 ° C are given.
  • graphitization may be followed by carbonation.
  • the properties of the carbonized shaped article can be regulated or controlled in particular by correspondingly corresponding properties being imparted to the inventive (non-carbonized) shaped article according to the method, which then have an effect on the properties of the carbonized shaped article.
  • a selective permeability for ions such as lithium ions, can be achieved.
  • the invention relates to the production of a shaped article based on cellulose according to the invention which contains a cotton twill fabric for reinforcement.
  • 100 g of cotton linters are dissolved in 900 g of ethyl methylimidazolium acetate (EMIM acetate) by stirring for 60 min at 80 ° C.
  • the cellulose solution obtained is filtered through a metal sieve (20 ⁇ m mesh size).
  • a cotton twill fabric is impregnated on both sides with this solution using a padder.
  • the order is 20 wt .-%, based on the finished shaped body.
  • Four layers of impregnated fabric are laid one on top of the other.
  • the resulting impregnated fabric package is maintained at 80 ° C for 2 minutes.
  • the solvent in The form of the designated ionic liquid is washed out of demineralized water in a coagulation bath. Thereafter, the washing water is pressed between two rollers.
  • the four-layer composite body according to the invention is dried in a hot press at a temperature of 120 ° C. and under a pressure of 8 N / cm 2 .
  • the following properties are set in the composite body: E-modulus 5400 [M Pa], tensile strength 350 [M Pa] and flexural strength 1200 [M Pa].
  • cellulose which contains m-aramid fibers for reinforcement.
  • the cellulose solution obtained is filtered through a metal sieve (20 ⁇ m mesh size).
  • An m-aramid fabric is impregnated on both sides with this solution using a doctor blade. The order is 15% by weight, based on the finished molding.
  • the invention relates to the production of a shaped article based on cellulose according to the invention, which contains polyamide fibers for reinforcement.
  • DP650 eucalyptus pulp
  • EMIM-DEP ethyl methylimidazolium diethyl phosphate
  • the cellulose solution obtained is filtered through a metal sieve (20 ⁇ m mesh size).
  • a polyamide fabric is impregnated on both sides with this solution by means of a doctor blade. The order is 15 wt .-%, based on the finished shaped body.
  • the invention relates to the production of a shaped article based on cellulose according to the invention which contains viscose tire cord fibers for reinforcement.
  • 100 g of cotton linters are dissolved in 900 g of ethyl methylimidazolium acetate (EMIM acetate) by stirring for 60 min at 80 ° C.
  • the cellulose solution obtained is filtered through a metal sieve (20 ⁇ m mesh size).
  • Viscose tire cord fibers are wound in parallel on a metal frame. With the help of a doctor blade is impregnated on both sides with this solution. The order is 30 wt .-%, based on the finished molded body.
  • the resulting impregnated fiber fabric is kept at 80 ° C for 2 minutes.
  • the solvent in the form of the designated ionic liquid is washed out of demineralized water in a coagulation bath. Thereafter, the washing water is pressed between two rollers.
  • the resulting fiber composite body is dried in a hot press at a temperature of 120 ° C and under a pressure of 8 N / cm 2 .
  • Example 5 Recycling of the Composite Materials According to Example 1
  • EMIM acetate ethyl methylimidazolium acetate

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  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
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  • Medicinal Chemistry (AREA)
  • Organic Chemistry (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Reinforced Plastic Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne un corps façonné présentant une matrice organique renforcée par des structures textiles, y compris des fibres. Ce corps façonné est fabriqué selon un procédé dans lequel de la cellulose est dissoute dans un liquide ionique fondu, la quantité de cellulose dans la solution contenant la cellulose obtenue étant de préférence comprise entre 2 et 30 % en poids, et en particulier entre 4 et 15 % en poids, la solution contenant la cellulose et éventuellement à des additifs intégrés modifiant les propriétés est mélangée à une structure textile, et ce mélange est introduit dans un milieu coagulant pour faire coaguler la cellulose, puis le corps façonné renforcé par du textile ainsi obtenu est lavé et séché. Ce corps façonné peut être utilisé de manières variées, en tant que partie d'habitacle d'automobile, par exemple une partie de toit, un habillage latéral ou un tableau de bord, pour une zone extérieure d'automobile, en particulier, en tant que protection de bas de caisse, en tant que partie de meuble, ainsi que pour la fabrication de corps façonnés carbonisés qui peuvent être utilisés par exemple en tant que matrice conductrice poreuse et en tant que séparateur, ou dans des piles à combustible, en tant que cathode, anode, ou en tant que membranes et séparateurs.
PCT/EP2012/076460 2011-12-29 2012-12-20 Corps façonné renforcé par une structure textile, son procédé de production et son utilisation WO2013098203A2 (fr)

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DE102011122560.2 2011-12-29
DE102011122560.2A DE102011122560B4 (de) 2011-12-29 2011-12-29 Textilverstärkter Formkörper, ein Verfahren zu dessen Herstellung sowie seine Verwendung

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WO2013098203A3 WO2013098203A3 (fr) 2013-11-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020016583A1 (fr) * 2018-07-19 2020-01-23 University Of Leeds Matériaux composites
WO2020064972A1 (fr) 2018-09-27 2020-04-02 Deutsche Institute Für Textil- Und Faserforschung Denkendorf Procédé de production d'un corps moulé en carbone-céramique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109187276A (zh) * 2018-09-25 2019-01-11 中国科学院过程工程研究所 一种基于离子液体溶剂的纤维素相对聚合度测定方法
DE102022125975A1 (de) 2022-10-07 2024-04-18 Holy Technologies Gmbh Faserverstärktes und recycelbares Strukturbauteil sowie Verfahren zu dessen Bereitstellung

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Publication number Priority date Publication date Assignee Title
WO1996036666A1 (fr) 1995-05-15 1996-11-21 Rhône-Poulenc Rhodia Aktiengesellschaft Corps moule constitue d'un materiau composite a base d'acetate de cellulose et de fibres cellulosiques naturelles d'armature, son procede de fabrication et son utilisation

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