Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
  • D06M14/18—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
  • D06M14/18—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation
  • D06M14/26—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation on to materials of synthetic origin
  • D06M14/28—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation on to materials of synthetic origin of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
  • D06M14/18—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation
  • D06M14/26—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation on to materials of synthetic origin
  • D06M14/30—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation on to materials of synthetic origin of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M14/32—Polyesters

Definitions

• the invention relates to a method for grafting functional chemical groups on a textile substrate, and a textile substrate and battery separator grafted using such a method.
• the invention particularly applies to the grafting of textile substrates so as to give them an ion exchange function.
• the invention proposes a method for grafting a bipolar textile substrate, i.e. comprising a different ion exchange function on each of the faces thereof.
• the grafted textile substrates according to the invention are particularly useful in the agri-food, pharmaceutical, medical, energy, biological and environmental sectors.
• the use of ion exchange textile substrates according to the invention makes it possible to:
• the implementation of known methods involves the problem of the removal of the solvent and non-grafted chemical substance which are contained in the textile substrate, and the problem of the subsequent recycling thereof.
• the aim of the invention is to remedy the problems of the prior art by proposing a method for grafting functional chemical groups on a textile substrate which is particularly simple and modular in the implementation thereof, said method also making it possible to obtain quality bipolar textile substrates.
• the invention proposes a method for grafting functional chemical groups on a textile substrate, said method envisaging impregnating said substrate with a solution of a functional molecule comprising the functional chemical group and a reactive group in ionising radiation, said solution also comprising a surfactant molecule which is capable of improving the wettability of the textile substrate by said solution, said surfactant molecule comprising at least two types of reactive groups in ionising radiation, said method envisaging applying ionising radiation on the impregnated textile substrate to, by means of a reaction of the reactive groups, graft functional molecules by means of coupling with the surfactant molecules.
• the invention proposes a textile substrate wherein at least one surface is grafted with functional chemical groups, said grafting being performed by means of coupling with a surfactant molecule using such a method.
• the invention proposes a battery separator whereon sulphonic groups and phosphoric and/or carboxylic groups are grafted, said grafting being performed by means of coupling with at least one surfactant molecule using such a method.
• the invention relates to a method for grafting functional chemical groups on a textile substrate, particularly functional chemical groups capable of exchanging cations or anions with the environment thereof, especially with a medium wherein the textile substrate is arranged.
• the method envisages impregnating the textile substrate with a solution of a functional molecule comprising the functional chemical group and a reactive group in ionising radiation.
• the solution comes at least partially in the form of an emulsion.
• the impregnation is performed by means of padding, the impregnated textile substrate being dried before the application of ionising radiation.
• the reactive groups may comprise an unsaturated bond which, under the effect of ionising radiation, forms a reactive free radical.
• the reactive groups in ionising radiation are selected in the group comprising hydroxyl, carboxyl, carbonyl, acrylate, methacrylate, allyl, amine, amide, imide, urethane groups.
• the cation exchange chemical group is selected in the group comprising the sulphonic, carboxylic and phosphoric groups, the cation exchange chemical group being selected in the group comprising the amine and ammonium groups.
• the functional molecule is selected in the group comprising sulphoalkyl methacrylates (particularly sulphopropyl methacrylate), carboxylic alkyl acrylates or methacrylates (particularly acrylic acid), phosphoric alkyl methacrylates, ethylene glycol methacrylate phosphate, dialkylamonoalkyl methacrylates (particularly dimethylaminoethyl methacrylate), alkyl trialkyl ammonium methacrylates (particularly acryloxyethyltrimethyl ammonium).
• sulphoalkyl methacrylates particularly sulphopropyl methacrylate
• carboxylic alkyl acrylates or methacrylates particularly acrylic acid
• phosphoric alkyl methacrylates ethylene glycol methacrylate phosphate
• dialkylamonoalkyl methacrylates particularly dimethylaminoethyl methacrylate
• alkyl trialkyl ammonium methacrylates particularly acryloxyethyltrimethyl
• the solvent of the solution is water, for example the functional molecule concentration is between 0.5 and 1 M.
• the solution may comprise other agents, particularly for improving the solubility of the molecules and/or the stability of said solution.
• the textile substrate is based on fibres made of synthetic material, particularly polyolefinic, as is frequently required for applications envisaged for grafted textile substrates.
• the fibres may be made of polypropylene, polyethylene, polyester, polyvinyl alcohol or polytetrafluoroethylene (PTFE), or a mixture of these different fibres.
• the grafting method according to the invention may also be implemented with textiles made of natural fibres, such as cotton or wool, or synthetic fibres, such as viscose or cellulose.
• the method envisages, to improve the wettability of the textile substrate by the solution, that said solution also comprises a surfactant molecule.
• said solution also comprises a surfactant molecule.
• the nature and quantity of the surfactant molecules in the solution are envisaged so that the surface tension of the solution is similar to that of the fibres.
• the textile substrate may be impregnated with a large volume of solution, so as to increase the density of functional chemical groups which are grafted on the textile substrate.
• the surfactant molecules used comprise at least two types of reactive groups in ionising radiation, said types possibly being identical or different with respect to each other and identical or different with respect to the functional molecule.
• the reaction of the reactive groups ensures the grafting of the functional molecules by means of coupling with the surfactant molecules.
• the reactions of the reactive groups make it possible to bind the surfactant molecules with the fibres or with each other, and the functional molecules with the surfactant molecules or directly with the fibres. This creates a network between the fibres, the functional molecules and the surfactant molecules which is particularly resistant with respect to chemical and mechanical stress to which the grafted textile substrate will be subjected within the scope of the use thereof.
• the ionising radiation consists of electron bombardment wherein the power and duration may be modulated to activate the reactive groups optimally.
• the grafting method is particularly modular in that the nature of the surfactant molecule may be selected according to the textile substrate, particularly according to the surface tension thereof, whereas the nature of the functional molecule is selected according to the functional chemical group to be grafted.
• the surfactant molecule may be difunctional comprising two types of reactive groups, for example the surfactant molecule may be selected in the group comprising diacrylates, particularly polyethylene glycol diacrylates (PEG DA).
• PEG DA polyethylene glycol diacrylates
• PEG600 DA is particularly satisfactory and, with high-density polyethylene fibres, the use of PEG200 DA gives satisfaction.
• the surfactant molecule may be trifunctional comprising three types of reactive groups, for example the surfactant molecule may be selected in the group comprising triacrylates, particularly ethoxylated trimethylolpropane triacrylates.
• the surfactant molecule may be selected in the group comprising triacrylates, particularly ethoxylated trimethylolpropane triacrylates.
• ethoxylated trimethylolpropane triacrylate 20 is particularly suitable.
• the textile substrate After applying the ionising radiation, the textile substrate may be washed and dried or undergo other treatments necessary for the subsequent use thereof. In addition, before grafting, the textile substrate may undergo specific treatments, particularly to improve the cohesion and/or wettability thereof.
• the solution comprises two functional molecules each comprising a different functional chemical group, the application of the ionising radiation being arranged to graft each of the functional chemical groups on one face of the textile substrate, respectively.
• the method is arranged to graft the textile substrate on a defined depth so as to form a superficial layer of grafted material.
• a textile substrate comprising two faces which are each grafted with a different functional chemical group.
• the textile substrate may have one anion exchange face and one cation exchange face.
• ionising radiation is applied on each of the faces, with a penetration thickness of said radiation which is less than the thickness of the textile substrate.
• the application of the radiation may be performed in a passage on each side of the textile substrate and the power of the ionising radiation is modulated to obtain the suitable penetration thickness.
• the textile substrate may be grafted on one half of the thickness thereof with anion exchange groups, and on the other half with cation exchange groups.
• the grafting method makes it possible to produce a battery separator comprising a textile substrate, particularly formed from a synthetic fibre non-woven lap, whereon sulphonic groups and phosphoric and/or carboxylic groups are grafted.
• the grafting is performed by means of coupling with at least one surfactant molecule as described above.
• the battery is of the nickel metal hydride type which displays good energy performances but has the drawback of generating ammonium ions during recharging/discharging cycles.
• ammonium ions pollute electrodes and, therefore, the battery recharging level. In this way, the battery autonomy is diminished.
• the capture function of the ammonium ions which are produced during the electrochemical operation of the battery.

Landscapes

• Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Cell Separators (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Paper (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=38445663

Family Applications (1)

Country Status (8)

Cited By (5)

Families Citing this family (4)

Citations (3)

Family Cites Families (4)

• 2007
  • 2007-01-29 FR FR0700593A patent/FR2911883B1/fr not_active Expired - Fee Related
• 2008
  • 2008-01-28 RU RU2009124413/05A patent/RU2009124413A/ru not_active Application Discontinuation
  • 2008-01-28 US US12/522,590 patent/US20100058542A1/en not_active Abandoned
  • 2008-01-28 CN CNA2008800017876A patent/CN101600833A/zh active Pending
  • 2008-01-28 WO PCT/FR2008/000098 patent/WO2008110681A1/fr active Application Filing
  • 2008-01-28 EP EP08761809A patent/EP2126191A1/fr not_active Withdrawn
  • 2008-01-28 JP JP2009546792A patent/JP2010516916A/ja active Pending
  • 2008-01-28 CA CA002672054A patent/CA2672054A1/fr not_active Abandoned

Patent Citations (3)

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