CN111253715A - High-elasticity conductive foam and preparation method thereof - Google Patents
High-elasticity conductive foam and preparation method thereof Download PDFInfo
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- CN111253715A CN111253715A CN202010096807.5A CN202010096807A CN111253715A CN 111253715 A CN111253715 A CN 111253715A CN 202010096807 A CN202010096807 A CN 202010096807A CN 111253715 A CN111253715 A CN 111253715A
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- 239000006260 foam Substances 0.000 title claims abstract description 94
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003365 glass fiber Substances 0.000 claims description 57
- 229920005989 resin Polymers 0.000 claims description 49
- 239000011347 resin Substances 0.000 claims description 49
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 27
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 25
- 239000003063 flame retardant Substances 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 25
- 229920002545 silicone oil Polymers 0.000 claims description 25
- 238000005507 spraying Methods 0.000 claims description 21
- 229920001567 vinyl ester resin Polymers 0.000 claims description 20
- -1 alkynyl cyclohexanol Chemical compound 0.000 claims description 19
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 229920001971 elastomer Polymers 0.000 claims description 18
- 229910021485 fumed silica Inorganic materials 0.000 claims description 18
- 229910052697 platinum Inorganic materials 0.000 claims description 18
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 17
- 229920001606 poly(lactic acid-co-glycolic acid) Polymers 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 15
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- XFZRQAZGUOTJCS-UHFFFAOYSA-N phosphoric acid;1,3,5-triazine-2,4,6-triamine Chemical compound OP(O)(O)=O.NC1=NC(N)=NC(N)=N1 XFZRQAZGUOTJCS-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 235000019830 sodium polyphosphate Nutrition 0.000 claims description 7
- 230000009467 reduction Effects 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000035618 desquamation Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/365—Coating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/25—Non-macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/326—Polyureas; Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/465—Coatings containing composite materials
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
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- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0085—Use of fibrous compounding ingredients
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- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/009—Use of pretreated compounding ingredients
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
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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
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- C08L63/10—Epoxy resins modified by unsaturated compounds
-
- 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
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
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- 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
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J2363/10—Epoxy resins modified by unsaturated compounds
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- 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
- C08J2400/00—Characterised by the use of unspecified polymers
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- 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
- C08J2421/00—Characterised by the use of unspecified rubbers
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- 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
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
Abstract
The invention relates to a high-elasticity conductive foam and a preparation method thereof in the field of conductive foam, wherein the high-elasticity conductive foam comprises the following components in parts by weight: the conductive foam has good elasticity, is easy to recover after being compressed, can meet the functions of sealing, pressure reduction and noise reduction and the like, and has the longitudinal tensile strength of 4.4-4.7MPa, the transverse tensile strength of 3.2-3.6MPa and the elastic modulus of 1.05 multiplied by 105The compression deformation rate can reach 78-88% under MPa, the rebound resilience can reach 99.2-99.7%, and the service life of the conductive foam is effectively prolonged.
Description
Technical Field
The invention relates to the field of conductive foam, in particular to high-elasticity conductive foam and a preparation method thereof.
Background
The conductive foam is a material integrating the functions of electric conduction and electromagnetic shielding, and is a three-dimensional net structure. The foam material has the advantages of uniform and soft foam pore diameter, high elasticity and no desquamation, has the characteristics of long conductive effective period, good shielding effect, no influence of temperature and humidity, surface resistance value which can be set according to practical application and the like, and is widely applied to computers, LCD displays, liquid crystal televisions, laser printers, high-speed copiers, communication equipment, mobile phones, satellite communication, medical equipment, instrument instruments, gaskets/clapboards, plugboard electronic products and shockproof conductive packages.
The conductive foam is composed of conductive fiber cloth with conductivity and corrosion resistance and PU foam with low compressive force as lining, and the finally obtained product has good elasticity and excellent shielding performance. The conductive fiber cloth is woven by metal fibers formed by covering copper and nickel metal surface layers on the surfaces of Polyester fibers, the bottom layer of the fibers is high-conductivity copper, the surface layer is oxidation-resistant and corrosion-resistant nickel metal, and the combination of the copper and the nickel provides excellent conductivity and shielding effect. The conductive foam can obtain good shielding effect in the frequency range of 100KHz to 1 GHz.
The prior conductive foam has poor elasticity and is difficult to recover after being compressed, and can not meet the functions of sealing, pressure reduction, noise reduction and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides high-elasticity conductive foam and a preparation method thereof, and aims to solve the problems that the existing conductive foam provided in the background art is poor in elasticity, difficult to restore after compression, incapable of meeting the functions of sealing, pressure reduction, noise reduction and the like.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the high-elasticity conductive foam comprises the following components in parts by weight: 70-80 parts of modified glass fiber, 20-30 parts of carbamate modified vinyl ester resin, 5-15 parts of silicone oil, 12-25 parts of rubber particles, 3-10 parts of fumed silica, 10-25 parts of flame retardant, 0.1-0.4 part of gel coat resin, 0.3-0.6 part of platinum complex and 0.5-2 parts of alkynyl cyclohexanol.
Preferably, the high-elasticity conductive foam comprises the following components in parts by weight: 73-78 parts of modified glass fiber, 25-28 parts of urethane modified vinyl ester resin, 8-11 parts of silicone oil, 16-20 parts of rubber particles, 5.5-7 parts of fumed silica, 16-20 parts of flame retardant, 0.1-0.3 part of gel coat resin, 0.45-0.55 part of platinum complex and 0.8-1.3 parts of alkynyl cyclohexanol.
Preferably, the high-elasticity conductive foam comprises the following components in parts by weight: 75 parts of modified glass fiber, 26 parts of urethane-modified vinyl ester resin, 10 parts of silicone oil, 18 parts of rubber particles, 8 parts of fumed silica, 18 parts of flame retardant, 0.25 part of gel coat resin, 0.5 part of platinum complex and 1.1 part of alkynyl cyclohexanol.
Preferably, the hydrogen content in the silicone oil is 0.38% -1.8%.
Preferably, the flame retardant is one or more than two of melamine phosphate, sodium polyphosphate, antimony trioxide or aluminum hydroxide powder, and the particle size is 25-45 μm.
The preparation method of the high-elasticity conductive foam comprises the following steps:
a. putting poly (lactide-co-glycolide) into acetone, heating and dissolving at 40-50 ℃, adding glass fiber and isocyanate-terminated prepolymer, stirring for 2-3h, filtering, and drying at 85-90 ℃ for 2.5-3h to obtain modified glass fiber for later use;
b. sequentially adding modified glass fiber, urethane-modified vinyl ester resin, silicone oil, rubber particles, fumed silica, a flame retardant, a platinum complex and alkynyl cyclohexanol into a stirring kettle, stirring for 100-150min at the stirring temperature of 26-30 ℃, vacuumizing to remove bubbles to obtain a foam raw material, pouring the foam raw material into a specified mold for molding, controlling the molding temperature to be 20-30 ℃, and molding for 15min to obtain molded conductive foam;
c. uniformly spraying gel coat resin on the formed conductive foam, wherein the spraying thickness of the gel coat resin is 0.38-0.42mm, and the conductive foam intermediate is formed;
d. and uniformly spraying the conductive powder to be sprayed on the conductive foam intermediate, and drying in an oven at the temperature of 80 ℃ for 1-2h to obtain the high-elasticity conductive foam.
Preferably, the mass ratio of the poly (lactide-co-glycolide), the glass fiber and the isocyanate-terminated prepolymer is 1: 6-12:2.
Preferably, the glass fiber has an average diameter of 5 to 12um and a length of 6 to 15 mm.
Has the advantages that:
according to the invention, the glass fiber is modified by matching the poly (lactide-co-glycolide), the acetone, the glass fiber and the isocyanate-terminated prepolymer, and the modified glass fiber has the advantages of high tensile strength, high elastic coefficient, non-combustibility, good chemical resistance, good scale stability and good heat resistance; more secondary hydroxyl groups in the vinyl resin can improve the wettability and the cohesiveness of the modified glass fiber, the mechanical strength of a laminated product is improved, the viamino groups in the modified vinyl ester resin of the modified viamino carbamate are beneficial to the permeability of the modified glass fiber and the entering of additives and the integrity of the material is improved, and then the gel coat resin is sprayed, so that the conductive foam has better elasticity and is easy to recover after being compressed, the functions of sealing, pressure reduction, noise reduction and the like can be met, and the longitudinal tensile strength can reach 4.4-47MPa, transverse tensile strength of 3.2-3.6MPa, and elastic modulus of 1.05X 105The compression deformation rate can reach 78-88% under MPa, the rebound resilience can reach 99.2-99.7%, and the service life of the conductive foam is effectively prolonged.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the high-elasticity conductive foam comprises the following components in parts by weight: 70 parts of modified glass fiber, 30 parts of urethane-modified vinyl ester resin, 15 parts of silicone oil, 25 parts of rubber particles, 3 parts of fumed silica, 10 parts of flame retardant, 0.4 part of gel coat resin, 0.6 part of platinum complex and 0.5 part of alkynyl cyclohexanol;
the hydrogen content in the silicone oil was 0.38%.
The flame retardant is one or more than two of melamine phosphate, sodium polyphosphate, antimony trioxide or aluminum hydroxide powder, and the particle size is 45 μm.
The preparation method of the high-elasticity conductive foam comprises the following steps:
a. putting poly (lactide-co-glycolide) into acetone, heating and dissolving at 90 ℃, adding glass fiber and isocyanate-terminated prepolymer, stirring for 3h, filtering, and drying at 90 ℃ for 2.5h, wherein the mass ratio of poly (lactide-co-glycolide), glass fiber and isocyanate-terminated prepolymer is 1: 12:2, the average diameter of the glass fiber is 5um, the length is 6mm, and the modified glass fiber is obtained for standby;
b. sequentially adding modified glass fiber, urethane-modified vinyl ester resin, silicone oil, rubber particles, fumed silica, a flame retardant, a platinum complex and alkynyl cyclohexanol into a stirring kettle, stirring for 100min at 26 ℃, vacuumizing to remove bubbles to obtain a foam raw material, pouring the foam raw material into a specified mold, and molding at 30 ℃ for 15min to obtain molded conductive foam;
c. uniformly spraying gel coat resin on the formed conductive foam, wherein the spraying thickness of the gel coat resin is 0.42mm, and the conductive foam is an intermediate;
d. and uniformly spraying the conductive powder to be sprayed on the conductive foam intermediate, and drying in an oven at 80 ℃ for 1h to obtain the high-elasticity conductive foam.
Example 2:
the high-elasticity conductive foam comprises the following components in parts by weight: 73 parts of modified glass fiber, 20 parts of urethane-modified vinyl ester resin, 5 parts of silicone oil, 12 parts of rubber particles, 10 parts of fumed silica, 13 parts of flame retardant, 0.1 part of gel coat resin, 0.4 part of platinum complex and 2 parts of alkynyl cyclohexanol;
the hydrogen content in the silicone oil was 0.18%.
The flame retardant is one or more than two of melamine phosphate, sodium polyphosphate, antimony trioxide or aluminum hydroxide powder, and the particle size is 25 μm.
The preparation method of the high-elasticity conductive foam comprises the following steps:
a. putting poly (lactide-co-glycolide) into acetone, heating and dissolving at 40 ℃, adding glass fiber and isocyanate-terminated prepolymer, stirring for 2h, filtering, drying at 85 ℃ for 2.7h, wherein the mass ratio of poly (lactide-co-glycolide), glass fiber and isocyanate-terminated prepolymer is 1: 9:2, the average diameter of the glass fiber is 7um, the length is 15mm, and the modified glass fiber is obtained for standby;
b. sequentially adding modified glass fiber, urethane-modified vinyl ester resin, silicone oil, rubber particles, fumed silica, a flame retardant, a platinum complex and alkynyl cyclohexanol into a stirring kettle, stirring for 150min at the stirring temperature of 30 ℃, vacuumizing to remove bubbles to obtain a foam raw material, pouring the foam raw material into a specified mold, and molding at the molding temperature of 25 ℃ for 15min to obtain molded conductive foam;
c. uniformly spraying gel coat resin on the formed conductive foam, wherein the spraying thickness of the gel coat resin is 0.38mm, and the conductive foam is an intermediate;
d. and uniformly spraying the conductive powder to be sprayed on the conductive foam intermediate, and drying in an oven at 80 ℃ for 2h to obtain the high-elasticity conductive foam.
Example 3:
the high-elasticity conductive foam comprises the following components in parts by weight: 75 parts of modified glass fiber, 26 parts of urethane-modified vinyl ester resin, 10 parts of silicone oil, 18 parts of rubber particles, 8 parts of fumed silica, 18 parts of flame retardant, 0.25 part of gel coat resin, 0.5 part of platinum complex and 1.1 part of alkynyl cyclohexanol;
the hydrogen content in the silicone oil was 1.1%.
The flame retardant is one or more than two of melamine phosphate, sodium polyphosphate, antimony trioxide or aluminum hydroxide powder, and the particle size is 30 μm.
The preparation method of the high-elasticity conductive foam comprises the following steps:
a. putting poly (lactide-co-glycolide) into acetone, heating and dissolving at 43 ℃, adding glass fiber and isocyanate-terminated prepolymer, stirring for 2.3h, filtering, and drying at 87 ℃ for 3h, wherein the mass ratio of poly (lactide-co-glycolide), glass fiber and isocyanate-terminated prepolymer is 1: 8:2, wherein the average diameter of the glass fiber is 12um, and the length of the glass fiber is 8mm, so as to obtain the modified glass fiber for later use;
b. sequentially adding modified glass fiber, urethane-modified vinyl ester resin, silicone oil, rubber particles, fumed silica, a flame retardant, a platinum complex and alkynyl cyclohexanol into a stirring kettle, stirring for 110min at the stirring temperature of 27 ℃, vacuumizing to remove bubbles to obtain a foam raw material, pouring the foam raw material into a specified mold, and molding at the molding temperature of 26 ℃ for 15min to obtain molded conductive foam;
c. uniformly spraying gel coat resin on the formed conductive foam, wherein the spraying thickness of the gel coat resin is 0.39mm, and the conductive foam is an intermediate;
d. and uniformly spraying the conductive powder to be sprayed on the conductive foam intermediate, and drying in an oven at 80 ℃ for 1.3h to obtain the high-elasticity conductive foam.
Example 4:
the high-elasticity conductive foam comprises the following components in parts by weight: 78 parts of modified glass fiber, 23 parts of urethane-modified vinyl ester resin, 8 parts of silicone oil, 15 parts of rubber particles, 5 parts of fumed silica, 21 parts of flame retardant, 0.15 part of gel coat resin, 0.3 part of platinum complex and 0.9 part of alkynyl cyclohexanol;
the hydrogen content in the silicone oil was 1.48%.
The flame retardant is one or more than two of melamine phosphate, sodium polyphosphate, antimony trioxide or aluminum hydroxide powder, and the particle size is 35 μm.
The preparation method of the high-elasticity conductive foam comprises the following steps:
a. putting poly (lactide-co-glycolide) into acetone, heating and dissolving at 46 ℃, adding glass fiber and isocyanate-terminated prepolymer, stirring for 2.7h, filtering, and drying at 88 ℃ for 2.6h, wherein the mass ratio of poly (lactide-co-glycolide), glass fiber and isocyanate-terminated prepolymer is 1: 6:2, the average diameter of the glass fiber is 8um, the length is 11mm, and the modified glass fiber is obtained for standby;
b. sequentially adding modified glass fiber, urethane-modified vinyl ester resin, silicone oil, rubber particles, fumed silica, a flame retardant, a platinum complex and alkynyl cyclohexanol into a stirring kettle, stirring for 135min at the stirring temperature of 29 ℃, vacuumizing to remove bubbles to obtain a foam raw material, pouring the foam raw material into a specified mold, and molding at the molding temperature of 27 ℃ for 15min to obtain molded conductive foam;
c. uniformly spraying gel coat resin on the formed conductive foam, wherein the spraying thickness of the gel coat resin is 0.4mm, and the conductive foam is an intermediate;
d. and uniformly spraying the conductive powder to be sprayed on the conductive foam intermediate, and drying in an oven at 80 ℃ for 1.7h to obtain the high-elasticity conductive foam.
Example 5
The high-elasticity conductive foam comprises the following components in parts by weight: 80 parts of modified glass fiber, 28 parts of urethane-modified vinyl ester resin, 12 parts of silicone oil, 21 parts of rubber particles, 7 parts of fumed silica, 25 parts of flame retardant, 0.3 part of gel coat resin, 0.5 part of platinum complex and 1.5 parts of alkynyl cyclohexanol;
the hydrogen content in the silicone oil was 1.8%.
The flame retardant is one or more than two of melamine phosphate, sodium polyphosphate, antimony trioxide or aluminum hydroxide powder, and the particle size is 40 μm.
The preparation method of the high-elasticity conductive foam comprises the following steps:
a. putting poly (lactide-co-glycolide) into acetone, heating and dissolving at 48 ℃, adding glass fiber and isocyanate-terminated prepolymer, stirring for 2.5h, filtering, drying at 89 ℃ for 2.8h, wherein the mass ratio of poly (lactide-co-glycolide), glass fiber and isocyanate-terminated prepolymer is 1: 7:2, the average diameter of the glass fiber is 9um, the length is 13mm, and the modified glass fiber is obtained for standby;
b. sequentially adding modified glass fiber, urethane-modified vinyl ester resin, silicone oil, rubber particles, fumed silica, a flame retardant, a platinum complex and alkynyl cyclohexanol into a stirring kettle, stirring for 120min at the stirring temperature of 28 ℃, vacuumizing to remove bubbles to obtain a foam raw material, pouring the foam raw material into a specified mold, and molding at the molding temperature of 28 ℃ for 15min to obtain molded conductive foam;
c. uniformly spraying gel coat resin on the formed conductive foam, wherein the spraying thickness of the gel coat resin is 0.341mm, and the conductive foam is an intermediate;
d. and uniformly spraying the conductive powder to be sprayed on the conductive foam intermediate, and drying in an oven at 80 ℃ for 1.8h to obtain the high-elasticity conductive foam.
The commercial conductive foam and the above examples were selected for the measurement
According to the invention, the glass fiber is modified by matching the poly (lactide-co-glycolide), the acetone, the glass fiber and the isocyanate-terminated prepolymer, and the modified glass fiber has the advantages of high tensile strength, high elastic coefficient, non-combustibility, good chemical resistance, good scale stability and good heat resistance; more secondary hydroxyl groups in the vinyl resin can improve the wettability and the cohesiveness to the modified glass fiber, the mechanical strength of a laminated product is improved, the vinylamino groups in the modified vinylcarbamate modified vinyl ester resin are beneficial to the permeability of the modified glass fiber and the entering of additives to improve the integrity of the substances, and then the gel coat resin is sprayed, so that the conductive foam has better elasticity and is easy to recover after being compressed, the functions of sealing, pressure reduction, noise reduction and the like can be met, the longitudinal tensile strength can reach 4.4-4.7MPa, the transverse tensile strength can reach 3.2-3.6MPa, and the elastic modulus is 1.05 multiplied by 105The compression deformation rate can reach 78-88% under MPa, the rebound resilience can reach 99.2-99.7%, and the service life of the conductive foam is effectively prolonged.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The high-elasticity conductive foam is characterized by comprising the following components in parts by weight: 70-80 parts of modified glass fiber, 20-30 parts of carbamate modified vinyl ester resin, 5-15 parts of silicone oil, 12-25 parts of rubber particles, 3-10 parts of fumed silica, 10-25 parts of flame retardant, 0.1-0.4 part of gel coat resin, 0.3-0.6 part of platinum complex and 0.5-2 parts of alkynyl cyclohexanol.
2. The high-elasticity conductive foam as claimed in claim 1, wherein the high-elasticity conductive foam comprises the following components in parts by weight: 73-78 parts of modified glass fiber, 25-28 parts of urethane modified vinyl ester resin, 8-11 parts of silicone oil, 16-20 parts of rubber particles, 5.5-7 parts of fumed silica, 16-20 parts of flame retardant, 0.1-0.3 part of gel coat resin, 0.45-0.55 part of platinum complex and 0.8-1.3 parts of alkynyl cyclohexanol.
3. The high-elasticity conductive foam as claimed in claim 2, wherein the high-elasticity conductive foam comprises the following components in parts by weight: 75 parts of modified glass fiber, 26 parts of urethane-modified vinyl ester resin, 10 parts of silicone oil, 18 parts of rubber particles, 8 parts of fumed silica, 18 parts of flame retardant, 0.25 part of gel coat resin, 0.5 part of platinum complex and 1.1 part of alkynyl cyclohexanol.
4. The high-elasticity conductive foam as claimed in claim 1, wherein: the hydrogen content in the silicone oil is 0.38-1.8%.
5. The high-elasticity conductive foam as claimed in claim 1, wherein: the flame retardant is one or more than two of melamine phosphate, sodium polyphosphate, antimony trioxide or aluminum hydroxide powder, and the particle size is 25-45 μm.
6. The preparation method of the high-elasticity conductive foam as claimed in claim 1, characterized by comprising the following steps:
a. putting poly (lactide-co-glycolide) into acetone, heating and dissolving at 40-50 ℃, adding glass fiber and isocyanate-terminated prepolymer, stirring for 2-3h, filtering, and drying at 85-90 ℃ for 2.5-3h to obtain modified glass fiber for later use;
b. sequentially adding modified glass fiber, urethane-modified vinyl ester resin, silicone oil, rubber particles, fumed silica, a flame retardant, a platinum complex and alkynyl cyclohexanol into a stirring kettle, stirring for 100-150min at the stirring temperature of 26-30 ℃, vacuumizing to remove bubbles to obtain a foam raw material, pouring the foam raw material into a specified mold for molding, controlling the molding temperature to be 20-30 ℃, and molding for 15min to obtain molded conductive foam;
c. uniformly spraying gel coat resin on the formed conductive foam, wherein the spraying thickness of the gel coat resin is 0.38-0.42mm, and the conductive foam intermediate is formed;
d. and uniformly spraying the conductive powder to be sprayed on the conductive foam intermediate, and drying in an oven at the temperature of 80 ℃ for 1-2h to obtain the high-elasticity conductive foam.
7. The preparation method of the high-elasticity conductive foam as claimed in claim 6, wherein the preparation method comprises the following steps: the mass ratio of the poly (lactide-co-glycolide), the glass fiber and the isocyanate-terminated prepolymer is 1: 6-12:2.
8. The method for preparing the high-elasticity conductive foam as claimed in claim 7, wherein the method comprises the following steps: the average diameter of the glass fiber is 5-12um, and the length is 6-15 mm.
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