Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
  • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
  • D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
  • A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
  • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
  • B01D67/0002—Organic membrane manufacture
  • B01D67/0004—Organic membrane manufacture by agglomeration of particles
  • B01D67/00042—Organic membrane manufacture by agglomeration of particles by deposition of fibres, nanofibres or nanofibrils
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
  • B01D69/10—Supported membranes; Membrane supports
  • B01D69/107—Organic support material
  • B01D69/1071—Woven, non-woven or net mesh
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/0007—Electro-spinning
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/0007—Electro-spinning
  • D01D5/0015—Electro-spinning characterised by the initial state of the material
  • D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
  • D01D5/0038—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion the fibre formed by solvent evaporation, i.e. dry electro-spinning
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K1/00—Printed circuits
  • H05K1/02—Details
  • H05K1/0277—Bendability or stretchability details
  • H05K1/0283—Stretchable printed circuits
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K1/00—Printed circuits
  • H05K1/02—Details
  • H05K1/03—Use of materials for the substrate
  • H05K1/038—Textiles
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L2400/00—Materials characterised by their function or physical properties
  • A61L2400/12—Nanosized materials, e.g. nanofibres, nanoparticles, nanowires, nanotubes; Nanostructured surfaces
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L2430/00—Materials or treatment for tissue regeneration
  • A61L2430/30—Materials or treatment for tissue regeneration for muscle reconstruction
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2325/00—Details relating to properties of membranes
  • B01D2325/04—Characteristic thickness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
  • B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
  • B01D69/10—Supported membranes; Membrane supports
  • B01D69/105—Support pretreatment
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2403/00—Details of fabric structure established in the fabric forming process
  • D10B2403/02—Cross-sectional features
  • D10B2403/024—Fabric incorporating additional compounds
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2403/00—Details of fabric structure established in the fabric forming process
  • D10B2403/03—Shape features
  • D10B2403/031—Narrow fabric of constant width
  • D10B2403/0311—Small thickness fabric, e.g. ribbons, tapes or straps
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
  • H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
  • H05K2201/0203—Fillers and particles
  • H05K2201/0242—Shape of an individual particle
  • H05K2201/026—Nanotubes or nanowires

Definitions

• the present invention generally relates to a composite membrane comprising a fibrous tissue impregnated with a wetting liquid.
• the present invention also relates to the production of such a membrane.
• composite materials can cover a wide range of mechanical, thermal and optical properties that can not be achieved with a single type of material.
• reinforced concrete which has the high compressive strength of concrete, but also a tensile strength thanks to the metal rods structuring the reinforced concrete ( thus constituting its frame).
• spider silk is made of filamentous protein fibers composed of hydrophilic and hydrophobic block copolymers and water; which moisten even more when the hygrometry is high (typically greater than 70%) or when the silk is suddenly wet. Thanks to the elasto-capillary winding of the fibers, the spider's capture silk shows a liquid behavior Unexpected in compression (it remains tense throughout the shortening of its end-to-end length), but remains solid in extension (thus showing an elastic behavior).
• the applicant has developed a composite membrane comprising a fibrous nanofiber fabric, the thickness of the fabric being between 10 nm and 50 ⁇ , the fabric being impregnated with a wetting liquid A.
• the composite membrane is immersed in a second fluid B immiscible with the wetting liquid A, forming an A / B interface between the wetting liquid A and said immiscible fluid B, and the composite membrane is able to remain tight.
• composite membrane means a membrane comprising a solid reinforcement (or a fabric) and a liquid impregnating the reinforcement by wetting it.
• stretched membrane means a membrane in a state of mechanical tension.
• miscible fluids are understood to mean fluids A and B forming only one phase and there is no surface tension at the A / B interface. Conversely, when fluids A and B are immiscible, they form two distinct phases, with non-zero surface tension at the A / B interface.
• the nanofibers are arranged in the form of a mat comprising between 1 and 20 layers of nanofibers.
• nanofibers are fibers having a diameter of between 10 nm and 5 ⁇ m, and typically of the order of 200 nm.
• a liquid wetting the fabric is understood to mean a liquid having a contact angle of less than 90 ° with a flat surface of the material composing the nanofibers of the fabric.
• the interface A / B formed by the wetting liquid A and the immiscible fluid B may be an oil / air interface, an oil / water interface, or a glycerol / air interface, or a water interface with surfactant. air.
• the A / B interface is stable over time (that is to say in the time of use of the composite membrane) because the liquid A which impregnates the fibrous mat does not diffuse into the fluid B.
• the A / B interface is present on both sides of the composite membrane
• surfactant or detergent
• a body which even used in small quantities, significantly modifies the surface tension of the fluid containing it, for example water when the detergent used is dissolved soap.
• the A / B interface is a soapy water / air type interface.
• the composite membrane according to the invention can adapt its surface and its shape to remain always under tension whatever the nature of the mechanical stress to which it is subjected, in the same way as a simple liquid film soapy, without ever breaking thanks to its solid character.
• the fibrous mattress folds spontaneously within the liquid layer which soaks when the edges of the composite membrane are close together.
• the surface tension developed by the A / B interface allows the membrane to remain taut even when compressed, as opposed to a dry membrane that would plaster beneath its weight.
• the membrane according to the invention has the property of remaining in a state of tension irrespective of the nature of the mechanical stressing of the membrane:
• the membrane functions as a liquid film
• the membrane when it is stretched from its compressed state to a stretching rate of up to 2000% in length in the compressed state, the membrane functions as a liquid film at first, then as a solid film.
• compression ratio means the ratio between the distance between the ends of a characteristic dimension of the fabric, under the effect of a mechanical deformation by compression, and this distance in the state. rest.
• the thickness of the fabric may advantageously be between 500 nm and 30 ⁇ m, and preferably between 1 ⁇ m.
• the nanofibers of the fabric may advantageously have a diameter of between 100 nm and 500 nm, and preferably of the order of 200 nm. .
• artificial muscle is meant, in the sense of the present invention, an organ capable of developing a mechanical force in response to an external stimulus.
• an intelligent circuit is understood to mean a circuit whose electrical behavior depends on the mechanical deformation imposed on the membrane.
• the SLIPS membrane is understood to mean a membrane impregnated with a wetting liquid A.
• the surface of the membrane impregnated with the liquid A is slippery for the liquid B. .
• Another subject of the present invention is a method for producing by electro-assisted extrusion a composite membrane according to the invention, comprising the following steps:
• said method being characterized in that it further comprises, at the end of step F, an additional step G of wetting the fibrous tissue with a wetting liquid A, so as to form a wet membrane;
• the composite membrane, the fibrous tissue and the nanofibers, which constitute it, the wetting liquid A and the fluid B immiscible with the liquid A (and consequently the A / B interface) are as defined above.
• the A / B interface obtained after immersion of the wet membrane in the fluid B may advantageously be an oil / air interface, an oil / water interface, or a glycerol / air interface, or a water interface with surfactant or detergent / air, for example of the soapy water type.
• the term "material" means the material constituting the nanofibers of the fibrous tissue.
• a parchment paper for example parchment paper marketed by Monoprix® under the trade name PAPER COOKING 8 METERS.
• the surface of the target which is oriented towards the cylinder is a flat face located at a distance L from the outlet (3a) of the capillary (3) between 5 cm and 15 cm, the capillary being subjected to a tension electrical U between 10 kV and 15 kV.
• this flat surface of the target is located at a distance L from the outlet (3a) of the capillary (3) which is of the order of 10 cm, the capillary being subjected to an electrical voltage U of the order of 12 kV.
• the material constituting the fabric may be a polymeric material selected from the group consisting of the following polymers:
• PAN polyacrylonitrile
• PVDF-HFP polyvinylidene fluoride-co-hexafluoropropylene
• PVA polyvinyl alcohol
• PVDF polyvinylidene fluoride
• the inorganic network may be, for example, SiO 2 (silica), TiO 2 (titanium dioxide), Fe 2 O 3 (oxide of iron), in the form of amorphous lattice or crystallized nanoparticles.
• FIG. 1 represents a schematic side perspective view of an electro-assisted extrusion device for carrying out the method according to the invention
• FIG. 2 schematically represents the formation of the so-called Taylor cone at the outlet of the capillary of the device of FIG. 1 (see part 2a of FIG. 2) and the behavior in compression and extension of the composite membrane according to the invention obtained after the implementation of the method according to the invention using the device of Figure 1 (see part 2b of Figure 2);
• FIG. 3 shows the use of the composite membrane according to the invention as a smart circuit;
• FIG. 4 shows the use of the composite membrane according to the invention as SLIPS membrane.
• a material capable of being dissolved by this solvent medium is introduced into a solvent medium; in the case of a polymer material, a solution 2 of polymer is formed;
• this solution 2 is then injected at a flow rate Q into a capillary 3 subjected to an electrical voltage U of between lkV and 100 kV (see FIG. 1 and photograph A of FIG. 2); the formation, at the outlet 3a of the capillary 3, of a drop 4 of solution 2 is observed (see photographs A and B of FIG. 2);
• this drop 4 is electrically charged, which causes its destabilization in the form of a cone 5 (see photo B of Figure 2);
• a liquid cylinder 6 (see photograph B of Figure 2) is ejected continuously from the cone 5, to a conductive target 7 of electricity (visible in Figures 1 and Figures A and B of the figure 2a), which is electrically grounded,
• a non-stick coating 7b such as parchment paper
• the fibrous tissue 1 thus obtained is wetted with a wetting liquid A (in this case water) so as to form a wet membrane.
• a wetting liquid A in this case water
• the wet membrane thus obtained is immersed in a fluid B (in this case air), which is immiscible with the wetting liquid A, so as to create an A / B interface between the wetting liquid (A) and said immiscible fluid (B).
• a fluid B in this case air
• we obtain a membrane composite 10 according to the invention see photograph E of FIG.
• Figures 1 and 2 show that the face 7a of the target 7 on which the nanofibers / fibrous tissue is collected is a flat face. But, it is possible to use a target that is not flat, for example in the form of a sphere.
• the photograph D of FIG. 2 is a photograph showing the compression behavior of the non-wet fibrous tissue: a sagging / buckling of the tissue in compression is observed.
• the photograph E of FIG. 2 shows the compression behavior of the composite membrane 10 according to the invention: it is observed that once wet, the membrane is self-tensing under the action of a capillary tension. This self-tension recalls that of a classic soap film on a frame.
• the photograph F is a detailed view of a portion of the composite membrane according to the invention, showing an excess of wrinkles inside the liquid film.
• Figure 3 shows the use of the composite membrane according to the invention as a smart circuit, and also as a stretchable electronic circuit.
• this figure shows that the electrical response of a smart tissue depends on its extension state, while a stretchy electronic circuit refers to an extensible fabric that can carry electronic information in any state of being. extension.
• the composite membrane according to the invention does not undergo fatigue and therefore, information Electronics can be realized through many compression cycles.
• FIG. 4 shows the use of the composite membrane according to the invention as SLIPS membrane. This figure shows in particular that these membranes are interchangeable, replaceable and adaptable to several surfaces.
• a SLIPS membrane according to the invention is interchangeable, replaceable and adaptable to several surfaces.
• PVDF-HFP tissue
• silicone oil / air type A / B interface or silicone / water oil can be fixed on any type of surface, it will adapt to its shape to cover it closely. It gives excellent results for self-cleaning surfaces:
• the membrane SLIPS according to the invention is disposed on a self-cleaning surface: a droplet of water falling on the glass does not attach. Thanks to the SLIPS coating, it starts to slip from a low contact angle, of the order of 4 ° (scale bar: 0.5 cm).
• the SLIPS membrane according to the invention is disposed on a hydrophobic surface. Thanks to this treatment
• the SLIPS membrane according to the invention is disposed on a hemisphere of glass treated with this SLIPS membrane according to the invention; the water droplets slip on the SLIPS coating while they remain trapped on an untreated normal glass.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Textile Engineering (AREA)
• Health & Medical Sciences (AREA)
• Mechanical Engineering (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Dispersion Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• Veterinary Medicine (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Transplantation (AREA)
• Epidemiology (AREA)
• Dermatology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Medicinal Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Materials Engineering (AREA)
• Nanotechnology (AREA)
• Manufacturing & Machinery (AREA)
• Composite Materials (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Laminated Bodies (AREA)
• Nonwoven Fabrics (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=59031107

Family Applications (1)

Country Status (7)

Family Cites Families (13)

• 2017
  • 2017-03-10 FR FR1751950A patent/FR3063743A1/fr active Pending
• 2018
  • 2018-03-09 EP EP18712985.3A patent/EP3592890A1/fr not_active Withdrawn
  • 2018-03-09 CN CN201880023672.0A patent/CN110603355A/zh active Pending
  • 2018-03-09 JP JP2019548966A patent/JP2020514567A/ja active Pending
  • 2018-03-09 CA CA3055481A patent/CA3055481A1/fr not_active Abandoned
  • 2018-03-09 US US16/492,920 patent/US20200010989A1/en not_active Abandoned
  • 2018-03-09 WO PCT/FR2018/050557 patent/WO2018162866A1/fr active Application Filing

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