CN102899900A - Emulsion type sizing agent for carbon fiber as well as preparation method and application of emulsion type sizing agent - Google Patents
Emulsion type sizing agent for carbon fiber as well as preparation method and application of emulsion type sizing agent Download PDFInfo
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Abstract
The invention discloses an emulsion type sizing agent for a carbon fiber as well as a preparation method and application of the emulsion type sizing agent. The sizing agent contains 2-40 percent of epoxy resin, 0-97 percent of water, 0.5-14 percent of surfactant, 0.3-12.5 percent of cardanol, 0.1-1.5 percent of formaldehyde and 0.1-2.0 percent of inorganic ammonium salts. The emulsion type sizing agent contains the cardanol and the formaldehyde as toughening and modifying agents, so that when the carbon fiber sized by using the emulsion type sizing agent for the carbon fiber is compounded with an epoxide resin matrix taking polyamine as a curing agent to form a composite material, the interlaminar shear strength is improved by over 30 percent and the carbon fiber composite material is enabled to have higher integral performance. The emulsion type sizing agent contains the inorganic ammonium salts, so that the storage stability of the sizing agent is greatly improved and the phenomena of demixing and non-uniformity of concentration are avoided. According to the emulsion type sizing agent disclosed by the invention, the phenomena of demixing and emulsion breaking in the use process of the sizing agent are avoided. After the carbon fiber sized by the sizing agent disclosed by the invention is stored at normal temperature for five years, the mass percentage of the sizing agent on the surface of the carbon fiber is unchanged.
Description
Technical field
The invention belongs to the carbon fiber production field, be specifically related to a kind of emulsion type carbon fiber sizing agent and its preparation method and application.
Background technology
In carbon fibre reinforced composite, for using sizing agent as transition zone between the carbon fiber that strengthens and the matrix resin, sizing agent can connect carbon fiber well, can connect well matrix resin again, make carbon fibre reinforced composite become as a whole, have very strong overall performance.
Patent CN1318686C discloses a kind of carbon fiber sizing agent, this carbon fiber contains with sizing agent, (A) have at least the compound of an epoxy radicals in the molecule, (B) have with ammonium ion as the anionic surfactant to ion, (C) nonionic surface active agent.
But, use the composite that the carbon fiber after the above-mentioned carbon fiber sizing agent starching is made, owing to the effect of enbrittling behind the epoxy resin cure contained in the sizing agent as the transition articulamentum, affected effective combination of carbon fiber and matrix resin, made carbon fiber ring epoxy resin-based composite interlaminar shear strength is less, and the overall performance of carbon fibre composite has been caused great adverse effect.And, storage and the stability in use of above-mentioned carbon fiber sizing agent are relatively poor, creaming of emulsion, emulsion concentration skewness can appear in storage and use procedure, even breakdown of emulsion, flocculation, reunion etc. occur too early, the phenomenons such as layering, sinking, muddiness appear in sizing agent, can't carry out the carbon fiber starching, and in use and course of conveying, can not stir comparatively fast, production has brought great inconvenience to carbon fiber for this, and the overall performance of carbon fiber and composite thereof is also brought very large adverse effect.
Summary of the invention
The shortcoming and deficiency that exist with sizing agent in order to overcome existing carbon fiber, primary and foremost purpose of the present invention is to provide a kind of emulsion type carbon fiber sizing agent through toughening modifying, carbon fiber through this sizing agent starching, after making the carbon fiber ring epoxy resin-based composite, the sizing agent layer that plays the interface connection function between carbon fiber and the matrix resin has extremely strong toughness, thereby interface binding power and the interface binding power between sizing agent and matrix resin between carbon fiber and sizing agent are all strengthened greatly, carbon fiber is combined with matrix resin effectively by sizing agent transition articulamentum, form an organic whole, greatly improved the interlaminar shear strength of carbon fibre composite.And, sizing agent provided by the invention also possesses storage and the good characteristic of stability in use, creaming of emulsion, emulsion concentration skewness phenomenon can not appear in storage and use procedure, and in use and course of conveying, can stir comparatively fast, the performance of having guaranteed sizing agent does not change in storage and use procedure, has guaranteed that greatly carbon fiber and composite thereof have higher overall performance.Guaranteed that carbon fibre composite has higher overall performance.
Another object of the present invention is to provide the preparation method of above-mentioned emulsion type carbon fiber with sizing agent.
A further object of the present invention is to provide the purposes of above-mentioned emulsion type carbon fiber with sizing agent.
Purpose of the present invention is achieved through the following technical solutions:
A kind of emulsion type carbon fiber sizing agent, contain the composition of following mass percent:
Epoxy resin: 2-40%
Water: 0-97%
Surfactant: 0.5-14%
Anacardol: 0.3-12.5%
Formaldehyde: 0.1-1.5%
Inorganic ammonium salt: 0.1-2.0%.
Described epoxy resin refers to contain in the molecule compound of at least one epoxy radicals, a kind of in preferred bisphenol A type epoxy resin, bisphenol f type epoxy resin or the novolac epoxy resin.
The preferred deionized water of described water.
Surfactant is the effect of playing emulsification, and described surfactant is anion surfactant and/or non-ionic surface active agent;
Described anion surfactant is organic ammonium (ammonia) salt and/or aminated compounds, and it contains suc as formula 1, the hydrophobic grouping shown in formula 2, formula 3 or the formula 4:
Formula 1
Formula 2
Formula 3
Formula 4
Among the formula 1-4, R
1, R
2, R
3Chain alkyl for hydrogen atom or C1-C3; R
4Be the divalent aliphatic alkyl; M is the integer of 1-3.
Described non-ionic surface active agent is the polyalkylene oxide Addition on ethylene thing of senior alcohol ether type, the polyalkylene oxide Addition on ethylene thing of higher fatty acids type, polyalkylene oxide Addition on ethylene thing or the PO/EO block type polyethers of alkyl phenyl ether type; The preferred polyethylene oxide alkyl ethers of described non-ionic surface active agent, polyethylene glycol oxide alkyl phenylate, polyoxyethylene fatty acid esters, polyethylene glycol oxide aliphatic acid amino ethers, polyol fatty acid ester, polyethylene glycol oxide polyol fatty acid ester, sucrose fatty ester, alkylolamides or polyoxygenated alkyl block virtue polymers.
Described anacardol be between the position on be connected with single phenol of C15 unsaturated terminal chain and the mixture of bis-phenol.
Described inorganic ammonium salt is ammonium chloride, ammonium sulfate or ammonium nitrate; This wherein, the stablizing effect of ammonium chloride is best, the therefore preferred ammonium chloride of described inorganic ammonium salt, this is because the ammonium chloride molecule is stronger with hydrogen bond action, ionic bond effect between epoxy resin molecule and hydrone, is conducive to the two also stable existences that combine.
The above-mentioned emulsion type carbon fiber preparation method of sizing agent may further comprise the steps:
Surfactant is soluble in water, add again epoxy resin, anacardol, formaldehyde, stir 60-100min under the 500-1000r/min; Then at 5000-10000r/min down cut emulsification 15-35min; Add at last inorganic ammonium salt, stir 15-25min under the 500-1000r/min, obtain the emulsion type carbon fiber sizing agent;
Described stirring all is to carry out under 40-80 ℃.
Above-mentioned emulsion type carbon fiber can be used in the epoxy resin base carbon fiber composite material with sizing agent, connects carbon fiber and epoxy resin-base as transition zone.
A kind of carbon fiber contains above-mentioned emulsion type carbon fiber sizing agent, and emulsion type carbon fiber is the 0.1-5% of carbon fiber quality with the quality of sizing agent.
A kind of epoxy resin base carbon fiber composite material contains above-mentioned carbon fiber, and epoxy resin-base uses polyamine as curing agent;
Described polyamine is the product after hydrogen atom is replaced by alkyl in the amino molecule, and contains two or more amino in the molecule, such as ethylenediamine, hexamethylene diamine, diethylenetriamine, m-phenylene diamine (MPD), triethylene tetramine, diaminodiphenyl-methane etc.
Surfactant in the sizing agent of the present invention (such as organic ammonium salt), as emulsifying agent in sizing agent, be used for the organic emulsification combination of two-phase of epoxy resin and water, lipophilic group in the surfactant molecule and epoxy resin molecule are combined closely, hydrophilic radical in the surfactant molecule and water molecules, make epoxy resin molecule and hydrone form comparatively stable micro emulsion grain by the connection function of surfactant molecule, these micro emulsion grains comparatively are evenly distributed in aqueous phase.When being subject to the active force such as ambient temperature variation, mechanical force, the micro emulsion grain is assembled agglomerating, can make finally that the profit two phase stratification is separated out, breakdown of emulsion.
Ammonium chloride is as stabilizing agent in the sizing agent of the present invention; chloride leach is at aqueous phase; chlorion and ammonium ion after the dissolving are because intermolecular force and electric charge graviational interaction can closely be dispersed in the skin of the micro emulsion grain of epoxy resin and hydrone formation; form one deck protection dispersion layer; thereby avoided the micro emulsion grain in the sizing agent owing to the variation of external condition is assembled agglomerating; therefore can not occur that layering is separated out, the phenomenon of breakdown of emulsion, storage stability and the stability in use of the sizing agent that greatly strengthens.
The present invention has following advantage and effect with respect to prior art:
1, owing to containing plasticized modifier anacardol and formaldehyde, use the carbon fiber after the emulsion type carbon fiber sizing agent starching of the present invention, when becoming composite with the use polyamine as the epoxy resin-base of curing agent is compound, anacardol in the sizing agent transition zone and formaldehyde can react with polyamine, the modified multicomponent amine hardener that reaction generates and the epoxy resin generation curing reaction in the sizing agent transition zone, thereby make the sizing agent transition zone after curing, have great toughness, thereby the sizing agent transition zone strengthens greatly to the switching performance of carbon fiber and matrix resin, improve approximately more than 30% with respect to existing its interlaminar shear strength of carbon fibre composite, guaranteed that carbon fibre composite has higher overall performance.
2, owing to containing the stabilizing agent inorganic ammonium salt, the storage stability of sizing agent of the present invention improves greatly, stores under the normal temperature that emulsion still can keep stable performance more than 3 years, layering and CONCENTRATION DISTRIBUTION uneven phenomenon can not occur; In the sizing agent use procedure of the present invention, rotating speed that can 200r/min stirs the conveying of carrying out sizing agent, dilution etc., and layering, demulsifying phenomenon can not appear in sizing agent; Use the carbon fiber after the sizing agent starching of the present invention, store 5 years under the normal temperature after carbon fiber surface sizing agent quality percentage composition unchanged; The carbon fibre composite that uses the carbon fiber after the sizing agent starching of the present invention to make, store 2 years under its normal temperature after mechanical property without significant change.
The specific embodiment
The present invention is described in further detail below in conjunction with embodiment, but embodiments of the present invention are not limited to this.
Embodiment 1
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant of 0.5g (Japanese emulsifying agent company/Nikon you 707-SF) is joined in the deionized water of 97g, and agitation as appropriate mixes it; The bisphenol A type epoxy resin, 0.3g anacardol, the 0.1g formaldehyde that add again 2g, the rotating speed with 1000r/min under 40 ℃ stirs 100min; Then under 40 ℃ with the rotating speed high speed shear emulsification 35min of 10000r/min; The ammonium chloride that adds at last 0.1g, the rotating speed with 1000r/min under 40 ℃ stirs 25min, namely gets the emulsion type carbon fiber sizing agent.
The structure of surfactant is as follows:
Japan emulsifying agent company/Nikon that 707-SF
Embodiment 2
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
With the surfactant of 1.5g (0.75g mitsubishi rayon/BPEO20SON, 0.75g mitsubishi rayon/SPEO120SON) join in the deionized water of 92.2g, agitation as appropriate mixes it; The bisphenol f type epoxy resin, 0.9g anacardol, the 0.1g formaldehyde that add again 5g, the rotating speed with 750r/min under 60 ℃ stirs 80min; Then under 60 ℃ with the rotating speed high speed shear emulsification 25min of 7500r/min; The ammonium chloride that adds at last 0.3g, the rotating speed with 750r/min under 60 ℃ stirs 20min, namely gets the emulsion type carbon fiber sizing agent.
The structure of surfactant is as follows:
Mitsubishi rayon/BPEO20SON
Mitsubishi rayon/SPEO120SON
Embodiment 3
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant (2.0g polyethylene oxide alkyl ethers, 2.0g polyethylene glycol oxide alkyl phenylate) of 4.0g is joined in the deionized water of 83.2g, and agitation as appropriate mixes it; The novolac epoxy resin, 2.0g anacardol, the 0.2g formaldehyde that add again 10g, the rotating speed with 500r/min under 60 ℃ stirs 60min; Then under 60 ℃ with the rotating speed high speed shear emulsification 15min of 5000r/min; The ammonium chloride that adds at last 0.6g, the rotating speed with 500r/min under 60 ℃ stirs 15min, namely gets the emulsion type carbon fiber sizing agent.
Embodiment 4
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant (polyethylene glycol oxide aliphatic acid amino ethers) of 8.0g is joined in the deionized water of 66.3g, and agitation as appropriate mixes it; The bisphenol A type epoxy resin, 4g anacardol, the 0.5g formaldehyde that add again 20g, the rotating speed with 500r/min under 80 ℃ stirs 60min; Then under 80 ℃ with the rotating speed high speed shear emulsification 15min of 5000r/min; The ammonium chloride that adds at last 1.2g, the rotating speed with 500r/min under 80 ℃ stirs 15min, namely gets the emulsion type carbon fiber sizing agent.
Embodiment 5
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant (4g Mitsui NPES3030P, 4g polyol fatty acid ester, 3g polyoxyethylene fatty acid esters) of 11g is joined in the deionized water of 49.6g, and agitation as appropriate mixes it; The bisphenol f type epoxy resin, 7g anacardol, the 0.8g formaldehyde that add again 30g, the rotating speed with 750r/min under 40 ℃ stirs 100min; Then under 40 ℃ with the rotating speed high speed shear emulsification 35min of 7500r/min; The ammonium chloride that adds at last 1.6g, the rotating speed with 750r/min under 40 ℃ stirs 25min, namely gets the emulsion type carbon fiber sizing agent.
The structure of surfactant is as follows:
Mitsui NPES3030P
Embodiment 6
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant (5g Japan emulsifying agent company/Nikon you 723-SF, 5g produce chemical industrial company/FO180EO6SON, 4g polyethylene glycol oxide polyol fatty acid ester daily) of 14g is joined in the deionized water of 30g, and agitation as appropriate mixes it; The bisphenol A type epoxy resin, 12.5g anacardol, the 1.5g formaldehyde that add again 40g, the rotating speed with 1000r/min under 80 ℃ stirs 80min; Then under 80 ℃ with the rotating speed high speed shear emulsification 25min of 10000r/min; The ammonium chloride that adds at last 2g, the rotating speed with 1000r/min under 80 ℃ stirs 20min, namely gets the emulsion type carbon fiber sizing agent.
The structure of surfactant is as follows:
Japan emulsifying agent company/Nikon that 723-SF
Daily output chemical industrial company/FO180EO6SON
Comparative Examples 1
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant of 0.5g (Japanese emulsifying agent company/Nikon you 707-SF) is joined in the deionized water of 97.5g, and agitation as appropriate mixes it; The bisphenol A type epoxy resin that adds again 2g, the rotating speed with 1000r/min under 40 ℃ stirs 100min; Then under 40 ℃ with the rotating speed high speed shear emulsification 35min of 10000r/min; Rotating speed with 1000r/min stirs 25min under 40 ℃ at last, namely gets the emulsion type carbon fiber sizing agent.
Comparative Examples 2
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
With the surfactant of 1.5g (0.75g mitsubishi rayon/BPEO20SON, 0.75g mitsubishi rayon/SPEO120SON) join in the deionized water of 93.5g, agitation as appropriate mixes it; The bisphenol f type epoxy resin that adds again 5g, the rotating speed with 750r/min under 60 ℃ stirs 80min; Then under 60 ℃ with the rotating speed high speed shear emulsification 25min of 7500r/min; Rotating speed with 750r/min stirs 20min under 60 ℃ at last, namely gets the emulsion type carbon fiber sizing agent.
Comparative Examples 3
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant (2.0g polyethylene oxide alkyl ethers, 2.0g polyethylene glycol oxide alkyl phenylate) of 4.0g is joined in the deionized water of 86g, and agitation as appropriate mixes it; The novolac epoxy resin that adds again 10g, the rotating speed with 500r/min under 60 ℃ stirs 60min; Then under 60 ℃ with the rotating speed high speed shear emulsification 15min of 5000r/min; Rotating speed with 500r/min stirs 15min under 60 ℃ at last, namely gets the emulsion type carbon fiber sizing agent.
Comparative Examples 4
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant (polyethylene glycol oxide aliphatic acid amino ethers) of 8.0g is joined in the deionized water of 72g, and agitation as appropriate mixes it; The bisphenol A type epoxy resin that adds again 20g, the rotating speed with 500r/min under 80 ℃ stirs 60min; Then under 80 ℃ with the rotating speed high speed shear emulsification 15min of 5000r/min; Rotating speed with 500r/min stirs 15min under 80 ℃ at last, namely gets the emulsion type carbon fiber sizing agent.
Comparative Examples 5
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant (4g Mitsui NPES3030P, 4g polyol fatty acid ester, 3g polyoxyethylene fatty acid esters) of 11g is joined in the deionized water of 59g, and agitation as appropriate mixes it; The bisphenol f type epoxy resin that adds again 30g, the rotating speed with 750r/min under 40 ℃ stirs 100min; Then under 40 ℃ with the rotating speed high speed shear emulsification 35min of 7500r/min; Rotating speed with 750r/min stirs 25min under 40 ℃ at last, namely gets the emulsion type carbon fiber sizing agent.
Comparative Examples 6
A kind of emulsion type carbon fiber sizing agent is prepared by following steps:
The surfactant (5g Japan emulsifying agent company/Nikon you 723-SF, 5g produce chemical industrial company/FO180EO6SON, 4g polyethylene glycol oxide polyol fatty acid ester daily) of 14g is joined in the deionized water of 46g, and agitation as appropriate mixes it; The bisphenol A type epoxy resin that adds again 40g, the rotating speed with 1000r/min under 80 ℃ stirs 80min; Then under 80 ℃ with the rotating speed high speed shear emulsification 25min of 10000r/min; Rotating speed with 1000r/min stirs 20min under 80 ℃ at last, namely gets the emulsion type carbon fiber sizing agent.
With its stability of visual observations after storing 3 years under the sizing agent normal temperature of embodiment, the rotating speed with 200r/min in the use stirs its stability of visual observations, and performance is listed in the table 1.
Use the sizing agent of embodiment to the impregnated carbon fiber starching, the sizing agent quality is 0.1% of carbon fiber gross mass, and storage was surveyed its sizing agent mass percent after 5 years under the normal temperature, listed in the table 2.The detection method of sizing agent content is the GB/T26752-2011 polyacrylonitrile-based carbon fibre.
Carbon fiber after the starching of use embodiment sizing agent is made epoxy resin base carbon fiber composite material, and epoxy resin-base uses ethylenediamine as curing agent, measures the interlaminar shear strength (ILSS) of gained carbon fibre composite; Survey its interlaminar shear strength after storing 2 years under the normal temperature, list in the table 3.The detection method of composite interlayer shear strength is that JC/T773-2010 fibre reinforced plastics short beam method is measured interlaminar shear strength.
With its stability of visual observations after storing 15 months under the sizing agent normal temperature of Comparative Examples, the rotating speed with 30r/min in the use stirs its stability of visual observations, and performance is listed in the table 1.
Use the sizing agent of Comparative Examples to the impregnated carbon fiber starching, the sizing agent quality is 5% of carbon fiber gross mass, and storage was surveyed its sizing agent mass percent after 5 years under the normal temperature, listed in the table 2.The detection method of sizing agent content is the GB/T26752-2011 polyacrylonitrile-based carbon fibre.
Carbon fiber after the starching of use Comparative Examples sizing agent is made epoxy resin base carbon fiber composite material, and epoxy resin-base uses ethylenediamine as curing agent, measures the interlaminar shear strength (ILSS) of gained carbon fibre composite; Survey its interlaminar shear strength after storing 2 years under the normal temperature, list in the table 3.The detection method of composite interlayer shear strength is that JC/T773-2010 fibre reinforced plastics short beam method is measured interlaminar shear strength.
The stability of table 1 sizing agent
Table 2 carbon fiber sizing agent changes of contents
Table 3 carbon fibre composite interlaminar shear strength
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 |
| Interlaminar shear strength/MPa | 110.41 | 109.88 | 110.56 | 109.32 | 110.68 | 110.14 |
| Store interlaminar shear strength/MPa after 2 years | 110.03 | 109.31 | 110.22 | 108.95 | 110.11 | 109.75 |
| Comparative Examples | 1 | 2 | 3 | 4 | 5 | 6 |
| Interlaminar shear strength/MPa | 82.55 | 82.88 | 81.71 | 82.68 | 81.85 | 81.49 |
| Store interlaminar shear strength/MPa after 2 years | 63.26 | 62.98 | 62.09 | 61.77 | 62.71 | 62.44 |
All added plasticized modifier anacardol and formaldehyde and stabilizing agent ammonium chloride among all embodiment, and all do not added in the Comparative Examples, all the other component ratios are identical.
Can find out by table 1: added that the storage stability of sizing agent strengthens greatly behind the stabilizing agent ammonium chloride, and the stability during agitation and dilution is strengthened greatly also in the use procedure, can stir with the rotating speed more than the 200r/min and dilute.
Can find out by table 2: added the sizing agent of stabilizing agent ammonium chloride, use it to the carbon fiber starching after, the sizing agent storage stability of carbon fiber surface strengthens greatly.
Can find out by table 3: the sizing agent that has added plasticized modifier anacardol and formaldehyde and stabilizing agent ammonium chloride, the carbon fibre composite that uses the carbon fiber after its starching to make, the mechanical properties such as its interlaminar shear strength have great increase, and shear strength was substantially unchanged after carbon fibre composite stored 2 years, and its storage stability strengthens greatly.
Above-described embodiment is the better embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. emulsion type carbon fiber sizing agent is characterized in that containing the composition of following mass percent:
Epoxy resin: 2-40%
Water: 0-97%
Surfactant: 0.5-14%
Anacardol: 0.3-12.5%
Formaldehyde: 0.1-1.5%
Inorganic ammonium salt: 0.1-2.0%.
2. emulsion type carbon fiber sizing agent according to claim 1 is characterized in that: described epoxy resin is a kind of in bisphenol A type epoxy resin, bisphenol f type epoxy resin or the novolac epoxy resin.
3. emulsion type carbon fiber sizing agent according to claim 1, it is characterized in that: described surfactant is anion surfactant and/or non-ionic surface active agent.
4. emulsion type carbon fiber sizing agent according to claim 1 is characterized in that: described inorganic ammonium salt is a kind of in ammonium chloride, ammonium sulfate or the ammonium nitrate.
5. emulsion type carbon fiber sizing agent according to claim 1, it is characterized in that: described inorganic ammonium salt is ammonium chloride.
6. each described emulsion type carbon fiber of claim 1-5 is with the preparation method of sizing agent, it is characterized in that may further comprise the steps: surfactant is soluble in water, add again epoxy resin, anacardol, formaldehyde, stir 60-100min under the 500-1000r/min; Then at 5000-10000r/min down cut emulsification 15-35min; Add at last inorganic ammonium salt, stir 15-25min under the 500-1000r/min, obtain the emulsion type carbon fiber sizing agent.
7. each described emulsion type carbon fiber of the claim 1-5 application of sizing agent in making epoxy resin base carbon fiber composite material.
8. carbon fiber, it is characterized in that: contain each described emulsion type carbon fiber sizing agent of claim 1-5, emulsion type carbon fiber is the 0.1-5% of carbon fiber quality with the quality of sizing agent.
9. epoxy resin base carbon fiber composite material is characterized in that: contain carbon fiber claimed in claim 8, epoxy resin-base uses polyamine as curing agent.
10. epoxy resin base carbon fiber composite material according to claim 9, it is characterized in that: described polyamine is ethylenediamine, hexamethylene diamine, diethylenetriamine, m-phenylene diamine (MPD), triethylene tetramine or diaminodiphenyl-methane.
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| JP7408205B1 (en) | 2023-09-12 | 2024-01-05 | 竹本油脂株式会社 | Sizing agent for reinforcing fibers and reinforcing fibers |
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