CN110396280B - Fiber-reinforced epoxy resin-based composite material and preparation method thereof - Google Patents
Fiber-reinforced epoxy resin-based composite material and preparation method thereof Download PDFInfo
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
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- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- 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
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- C08J2483/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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Abstract
The invention relates to a fiber reinforced epoxy resin-based composite material for a transmission conductor and a preparation method thereof, belonging to the technical field of composite materials. The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 50-60 parts of epoxy resin, 20-30 parts of nano-cellulose, 10-20 parts of hyperbranched amino modified polysiloxane, 1-10 parts of benzyl dimethylamine and 0.5-4 parts of curing agent. The tensile strength of the composite material obtained by the invention under the room temperature condition is 101-120MPa, the bending strength is 127-158MPa, and the impact toughness is 15.3-17.5kJ/m2And the comprehensive mechanical property is excellent.
Description
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to a fiber reinforced epoxy resin-based composite material for a transmission conductor and a preparation method thereof.
Background
The fiber reinforced epoxy resin composite material is a high-performance novel material which takes epoxy resin as a matrix and fibers as a reinforcing material, has excellent mechanical property and electrochemical property, and obviously improves the performance relative to the original material. For example, the steel has the characteristics of high specific strength, fatigue resistance, high specific modulus, corrosion resistance, strong designability, convenience for integral forming and the like. In recent years, research has been focused and important applications have been made in energy-saving power transmission conductors, but there are some technical problems that cannot be solved well, so that the fiber reinforced epoxy resin composite material is difficult to commercialize. The fiber in the fiber-reinforced epoxy resin composite material has smooth surface, low surface energy, few active functional groups and poor wettability with matrix resin; the problems of high crosslinking density, high internal stress, brittle texture and poor impact resistance of matrix resin after curing cause poor interface bonding of the composite material, low interlaminar shear strength and poor impact toughness, so that the composite material cannot be widely applied in the high-tech field.
The patent document with publication number CN 108084655 a provides a low temperature resistant epoxy resin material and a preparation method thereof, the material is composed of epoxy resin, heteronaphthalene biphenyl polyarylether sulfone, graphene and a curing agent, the graphene and the heteronaphthalene biphenyl polyarylether sulfone of the invention have a synergistic effect, the graphene regulates and controls the degree of phase separation of the heteronaphthalene biphenyl polyarylether sulfone and the epoxy resin in the curing process, so that the phase structure of the composite material stays in a "bicontinuous phase structure" in the curing process, thereby the epoxy resin composite material has good ultra-low temperature toughness; according to the invention, the graphene and the naphthalene-doped diphenyl polyarylethersulfone realize synergistic effect by adjusting the proportion and content of various components, and the epoxy resin material with greatly improved comprehensive low-temperature resistance is obtained, namely, the epoxy resin material has the advantages of high mechanical property, excellent thermal stability and the like at the temperature of liquid nitrogen, and is easy to manufacture and process. The composite material obtained by the invention has general effects of improving the tensile strength, the impact strength and the fracture toughness at the liquid nitrogen temperature and needs to be improved.
Patent document No. CN109608824A discloses a method for preparing a nano silicon nitride fiber/epoxy resin composite material, which is prepared by impregnating a mixed material of epoxy resin, epoxy resin curing agent and accelerator into a porous nano silicon nitride fiber frame and curing at high temperature, wherein the volume fraction of the nano silicon nitride fiber in the nano silicon nitride fiber/epoxy resin composite material is 20 vol% to 60 vol%. The nano silicon nitride fiber in the epoxy resin composite material prepared by the method is a continuous phase, so that the high-low temperature mechanical property, the thermal conductivity, the high-temperature creep resistance and the fracture toughness of the composite material can be greatly improved. The composite material has complex preparation process and difficult processing.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a fiber reinforced epoxy resin composite material for a power transmission conductor to improve the mechanical property of the composite material, aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 50-60 parts of epoxy resin, 20-30 parts of nano-cellulose, 10-20 parts of hyperbranched amino modified polysiloxane, 1-10 parts of benzyl dimethylamine and 0.5-4 parts of curing agent.
Preferably, the epoxy resin is a bisphenol a type epoxy resin, a trifunctional epoxy resin, or a tetrafunctional epoxy resin.
Preferably, the nanocellulose is bacterial cellulose, a bacterial cellulose-carbon nanotube composite material or a bacterial cellulose-graphene composite material.
Preferably, the curing agent is one or a mixture of two of 4, 4' diaminodiphenyl sulfone and 1-methylimidazole.
Preferably, the weight ratio of 4, 4' diaminodiphenyl sulfone to 1-methylimidazole is 1: (1-3).
Preferably, the fiber reinforced epoxy resin based composite material is prepared from the following raw materials in parts by weight: 55 parts of epoxy resin, 25 parts of nano-cellulose, 16 parts of hyperbranched amino-modified polysiloxane, 5 parts of benzyl dimethylamine and 2.5 parts of curing agent.
Preferably, the preparation method of the fiber reinforced epoxy resin-based composite material comprises the following steps:
s1: weighing epoxy resin, hyperbranched amino modified polysiloxane and benzyl dimethylamine, mixing with a solvent, heating to 60-70 ℃, magnetically stirring for 2-3 hours, and cooling to obtain a first material;
s2: mixing the nano-cellulose with the first material, and grinding the mixture in a three-roll grinder to obtain a second material;
s3: and adding a curing agent into the second material, heating to 75-80 ℃, uniformly stirring, putting the mixture into a vacuum drying oven while the mixture is hot, vacuumizing for 1-1.2 hours, taking out the mixture, putting the mixture into the drying oven, and curing to obtain a product.
Preferably, the curing is carried out in three stages, 1 hour at 80-85 ℃,2 hours at 100-110 ℃ and 3 hours at 140-150 ℃.
In the field of composite materials, epoxy resin is often used as a resin matrix, has the advantages of good mechanical property, strong adhesion, multiple types, convenient curing and the like, but also has the defect of low temperature and easy brittleness, which is mainly determined by a high-degree crosslinking structure, and the current method for solving the problem comprises the following steps: one is to introduce liquid rubber into the epoxy network structure; the other is to change the structure of the monomer. The first method, which increases the initial properties at the expense of reduced modulus, is often not suitable. The second method is to change the chemical crosslinking density or the like by using a curing agent. The curing agent determines the type of curing reaction and thus influences the properties of the curing system, but the improvement effect is limited. In recent years, the modification of epoxy resins with fibers as reinforcing materials has been an important direction of research. At present, glass fiber, carbon fiber, Kevlar fiber and the like are commonly used as reinforcing materials of composite materials, the comprehensive performance of the fiber materials is excellent, but the fiber materials generally have the new problems of difficult processing, large energy consumption, high manufacturing cost, easy environmental pollution and the like. As a novel high molecular material synthesized by microorganisms, the bacterial cellulose has a high crystallinity, a strong water-holding capacity, a hyperfine network structure, extremely high tensile strength and the like, and research reports show that the characteristics of the bacterial cellulose such as a nano network structure, an ultra-strong elastic modulus and the like can be used for reinforcing a polymer matrix to prepare a reinforced composite material (Zhangxiu chrysanthemum, Lindan, Chenwenbin and the like. The invention tries to use nano bacterial cellulose as a reinforcing material of the epoxy resin composite material, and prepares the composite material with excellent mechanical properties, particularly low-temperature properties through raw materials and process optimization.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the epoxy resin is used as matrix resin, the nano-cellulose is preferably used as a reinforcing fiber material, a proper amount of hyperbranched amino modified polysiloxane is added as an auxiliary reinforcing material, and the composite material with excellent mechanical properties is obtained through reasonable matching of raw material composition and proportion.
Firstly, modifying epoxy resin by using hyperbranched amino modified polysiloxane and benzyldimethylamine so as to improve the curing shrinkage and mechanical properties of the epoxy resin and obtain modified epoxy resin; and taking nano-cellulose as a reinforced fiber material, preferably selecting bacterial cellulose, a bacterial cellulose-carbon nanotube composite material or a bacterial cellulose-graphene composite material, combining a nano-mesh structure of the bacterial cellulose, adopting a three-roll grinding technology, mixing and grinding the nano-cellulose and the modified epoxy resin to effectively combine the nano-cellulose and the modified epoxy resin, and finally curing the epoxy resin composite material through a curing process to obtain the product.
According to the invention, the combination of raw materials is optimized, and the three-roller grinding and curing process is combined, so that the nano-cellulose and the matrix epoxy resin have good wettability, the interface binding force is improved, the interlaminar shear strength is reduced, and the impact toughness of the composite material is obviously improved. The tensile strength of the composite material obtained by the invention under the room temperature condition is 101-120MPa, the bending strength is 127-158MPa, and the impact toughness is 15.3-17.5kJ/m2(ii) a The tensile strength and the bending strength under the low-temperature condition are obviously improved compared with the room-temperature condition, and the impact toughness is still obviously improved compared with the epoxy resin and the nano-cellulose.
Detailed Description
The present invention will be further described with reference to the following examples.
Bisphenol a epoxy resin, model E-03, Hubei Xinkang pharmaceutical chemical Co., Ltd;
trifunctional epoxy resin (TGAP), type YH-300; epoxy resin with four functionality (TGDDM), model KDT-4400, Xiamen Keke chemical Co., Ltd;
bacterial cellulose, Hainan Yide food Co., Ltd;
the hyperbranched amino-modified polysiloxane is self-prepared in documents of Liuyangjie [1], Wuming Hua [1,2], et al, the synthesis and the application of the hyperbranched amino-modified polysiloxane [ J ]. journal of textile, 2014,35(12): 73-79.;
benzyl dimethylamine, molecular formula: C9H13N, relative molecular mass: 135.20.
4, 4' diaminodiphenyl sulfone, molecular formula C12H12N2O2S, purity not less than 99.0%, molecular weight 248.30;
1-methylimidazole with the molecular formula of C4H6N2 and the molecular weight of 82.1038.
Three-roll mill, model C-S150, is a capital machinery equipment Co., Ltd.
Example 1
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 55 parts of epoxy resin, 25 parts of nano-cellulose, 16 parts of hyperbranched amino-modified polysiloxane, 5 parts of benzyl dimethylamine and 2.5 parts of curing agent.
The epoxy resin is bisphenol A type epoxy resin.
The nano-cellulose is bacterial cellulose.
The curing agent is 4, 4' diaminodiphenyl sulfone.
The preparation method of the fiber reinforced epoxy resin matrix composite material comprises the following steps:
s1: weighing epoxy resin, hyperbranched amino modified polysiloxane and benzyl dimethylamine, mixing with a solvent, heating to 65 ℃, magnetically stirring for 2.5 hours, and cooling to obtain a first material;
s2: mixing the nano-cellulose with the first material, and grinding the mixture in a three-roll grinder to obtain a second material;
s3: and adding a curing agent into the second material, heating to 78 ℃, uniformly stirring, putting into a vacuum drying oven while the second material is hot, vacuumizing for 1 hour, taking out, putting into the drying oven, and curing to obtain a product.
The curing is carried out in three stages, namely 1 hour at 80 ℃,2 hours at 100 ℃ and 3 hours at 150 ℃.
Example 2
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 55 parts of epoxy resin, 25 parts of nano-cellulose, 16 parts of hyperbranched amino-modified polysiloxane, 5 parts of benzyl dimethylamine and 2.5 parts of curing agent.
The epoxy resin is a trifunctional epoxy resin.
The nano-cellulose is a bacterial cellulose-carbon nano tube composite material.
The curing agent is a mixture of 4,4 'diaminodiphenyl sulfone and 1-methylimidazole, and the weight ratio of the 4, 4' diaminodiphenyl sulfone to the 1-methylimidazole is 1: 2.
the preparation method of the fiber reinforced epoxy resin matrix composite material comprises the following steps:
s1: weighing epoxy resin, hyperbranched amino modified polysiloxane and benzyl dimethylamine, mixing with a solvent, heating to 60 ℃, magnetically stirring for 3 hours, and cooling to obtain a first material;
s2: mixing the nano-cellulose with the first material, and grinding the mixture in a three-roll grinder to obtain a second material;
s3: and adding a curing agent into the second material, heating to 80 ℃, uniformly stirring, putting into a vacuum drying oven while the second material is hot, vacuumizing for 1.2 hours, taking out, putting into the drying oven, and curing to obtain a product.
The curing is carried out in three stages, namely 1 hour at 82 ℃,2 hours at 110 ℃ and 3 hours at 140 ℃.
Example 3
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 55 parts of epoxy resin, 25 parts of nano-cellulose, 16 parts of hyperbranched amino-modified polysiloxane, 5 parts of benzyl dimethylamine and 2.5 parts of curing agent.
The epoxy resin is a tetrafunctional epoxy resin.
The nano-cellulose is a bacterial cellulose-graphene composite material.
The curing agent is a mixture of 4,4 'diaminodiphenyl sulfone and 1-methylimidazole, and the weight ratio of the 4, 4' diaminodiphenyl sulfone to the 1-methylimidazole is 1: 3.
the preparation method of the fiber reinforced epoxy resin matrix composite material comprises the following steps:
s1: weighing epoxy resin, hyperbranched amino modified polysiloxane and benzyl dimethylamine, mixing with a solvent, heating to 70 ℃, magnetically stirring for 2 hours, and cooling to obtain a first material;
s2: mixing the nano-cellulose with the first material, and grinding the mixture in a three-roll grinder to obtain a second material;
s3: and adding a curing agent into the second material, heating to 75 ℃, uniformly stirring, putting into a vacuum drying oven while the material is hot, vacuumizing for 1.2 hours, taking out, putting into the drying oven, and curing to obtain a product.
The curing is carried out in three stages, namely 1 hour at 85 ℃,2 hours at 105 ℃ and 3 hours at 145 ℃.
Example 4
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 50 parts of epoxy resin, 20 parts of nano-cellulose, 10 parts of hyperbranched amino modified polysiloxane, 1 part of benzyl dimethylamine and 0.5 part of curing agent.
The epoxy resin is bisphenol A type epoxy resin.
The nano-cellulose is bacterial cellulose.
The curing agent is 1-methylimidazole.
The preparation method of the fiber reinforced epoxy resin matrix composite material comprises the following steps:
s1: weighing epoxy resin, hyperbranched amino modified polysiloxane and benzyl dimethylamine, mixing with a solvent, heating to 62 ℃, magnetically stirring for 2.3 hours, and cooling to obtain a first material;
s2: mixing the nano-cellulose with the first material, and grinding the mixture in a three-roll grinder to obtain a second material;
s3: and adding a curing agent into the second material, heating to 76 ℃, uniformly stirring, putting into a vacuum drying oven while the material is hot, vacuumizing for 1.2 hours, taking out, putting into the drying oven, and curing to obtain a product.
The curing is carried out in three stages, namely 1 hour at 83 ℃,2 hours at 108 ℃ and 3 hours at 142 ℃.
Example 5
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 60 parts of epoxy resin, 30 parts of nano-cellulose, 20 parts of hyperbranched amino-modified polysiloxane, 10 parts of benzyl dimethylamine and 4 parts of curing agent.
The epoxy resin is a trifunctional epoxy resin.
The nano-cellulose is a bacterial cellulose-carbon nano tube composite material.
The curing agent is a mixture of 4,4 'diaminodiphenyl sulfone and 1-methylimidazole, and the weight ratio of the 4, 4' diaminodiphenyl sulfone to the 1-methylimidazole is 1: 1.
the preparation method of the fiber reinforced epoxy resin matrix composite material refers to example 1.
Example 6
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 53 parts of epoxy resin, 25 parts of nano-cellulose, 14 parts of hyperbranched amino-modified polysiloxane, 6 parts of benzyl dimethylamine and 2.1 parts of curing agent.
The epoxy resin is a tetrafunctional epoxy resin.
The nano-cellulose is bacterial cellulose.
The curing agent is 1-methylimidazole.
The preparation method of the fiber reinforced epoxy resin matrix composite material refers to example 1.
Example 7
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 52 parts of epoxy resin, 23 parts of nano-cellulose, 12 parts of hyperbranched amino-modified polysiloxane, 3 parts of benzyl dimethylamine and 1.3 parts of curing agent.
The epoxy resin is bisphenol A type epoxy resin.
The nano-cellulose is a bacterial cellulose-graphene composite material.
The curing agent is a mixture of 4,4 'diaminodiphenyl sulfone and 1-methylimidazole, and the weight ratio of the 4, 4' diaminodiphenyl sulfone to the 1-methylimidazole is 1: 1.5.
the preparation method of the fiber reinforced epoxy resin matrix composite material refers to example 1.
Example 8
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 58 parts of epoxy resin, 26 parts of nano-cellulose, 18 parts of hyperbranched amino-modified polysiloxane, 8 parts of benzyl dimethylamine and 3.2 parts of curing agent.
The epoxy resin is a trifunctional epoxy resin.
The nano-cellulose is bacterial cellulose.
The curing agent is 4, 4' diaminodiphenyl sulfone.
The preparation method of the fiber reinforced epoxy resin matrix composite material refers to example 1.
Comparative example 1
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 55 parts of epoxy resin, 25 parts of nano-cellulose, 16 parts of hyperbranched amino-modified polysiloxane, 5 parts of benzyl dimethylamine and 2.5 parts of curing agent.
The curing agent is methyl tetrahydrophthalic anhydride.
The remaining parameters were the same as in example 1.
Comparative example 2
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 55 parts of epoxy resin, 25 parts of nano-cellulose, 25 parts of hyperbranched amino-modified polysiloxane, 5 parts of benzyl dimethylamine and 2.5 parts of curing agent.
Comparative example 3
The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 55 parts of epoxy resin, 25 parts of nano-cellulose, 16 parts of hyperbranched amino-modified polysiloxane and 2.5 parts of curing agent.
Comparative example 4
The preparation method of the fiber reinforced epoxy resin matrix composite material comprises the following steps:
s1: weighing epoxy resin, hyperbranched amino modified polysiloxane and benzyl dimethylamine, mixing with a solvent, heating to 80 ℃, magnetically stirring for 1.5 hours, and cooling to obtain a first material;
s2: mixing the nano-cellulose with the first material, and grinding the mixture in a three-roll grinder to obtain a second material;
s3: and adding a curing agent into the second material, heating to 85 ℃, uniformly stirring, putting into a vacuum drying oven while the second material is hot, vacuumizing for 1 hour, taking out, putting into the drying oven, and curing to obtain a product.
The curing is carried out in four stages of 1 hour at 80 ℃,2 hours at 100 ℃,2 hours at 120 ℃ and 3 hours at 150 ℃.
Evaluation of mechanical Properties
The composite materials prepared in examples 1-5 and comparative examples 1-4 are made into standard parts according to GB/T1447-2005, GB/T1449-2005 and GB/T1451-2005 and are subjected to mechanical property (tensile, bending and impact) tests under the conditions of room temperature (25 ℃) and low temperature (liquid nitrogen-196 ℃) respectively, wherein the type and the size of the sample depend on the specification of the fiber reinforced thermosetting resin.
a) Calculation formula of tensile strength:
b) the calculation formula of the bending strength is as follows:
c) the calculation formula of the impact toughness is as follows:
the results of the experiment are shown in tables 1-2.
TABLE 1 test results at Room temperature
The experimental result shows that the tensile strength of the composite material is 101-120MPa, the bending strength is 127-158MPa and the impact toughness is 15.3-17.5kJ/m under the room temperature condition2And the comprehensive mechanical property is excellent. Comparative examples 1 to 4 have conventionally changed the composition or preparation process parameters of the composite material, the tensile strength, bending strength and impact toughness of the obtained composite material are reduced more or less significantly, and exceed the conventional prediction range, and data analysis shows that the nanofiber has excellent reinforcing and toughening effects on the epoxy resin, and the reasonable use of the hyperbranched amino-modified polysiloxane and the benzyldimethylamine has a key effect on obtaining the composite material with excellent mechanical properties.
TABLE 2 test results at Low temperature
The experimental result shows that the tensile strength and the bending strength of the composite material under the low-temperature condition are both obviously increased compared with the room temperature, so that the influence effect of the low temperature on the material is very large, and the reason is that the intermolecular action of the resin is frozen under the low-temperature condition, the intermolecular force is enhanced, and the material strength is increased; meanwhile, under the condition of low temperature, the shrinkage rate of the resin is improved, so that the interface bonding force between the fiber and the resin is stronger, and the internal stress is increased. For impact toughness, the impact toughness of the composite material decreases at low temperature, indicating that after the temperature is decreased, the impact toughness of the composite material is significantly decreased, so that the material becomes brittle at low temperature. Meanwhile, the raw materials and the proportion (curing agent, hyperbranched amino-modified polysiloxane and benzyldimethylamine) thereof, the preparation parameters and the like in the composite material have obvious influence on the excellent mechanical properties.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (4)
1. The fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 50-60 parts of epoxy resin, 20-30 parts of nano-cellulose, 10-20 parts of hyperbranched amino modified polysiloxane, 1-10 parts of benzyl dimethylamine and 0.5-4 parts of curing agent;
the nano-cellulose is bacterial cellulose, a bacterial cellulose-carbon nano tube composite material or a bacterial cellulose-graphene composite material;
the curing agent is a mixture of 4, 4' diaminodiphenyl sulfone and 1-methylimidazole;
the preparation method of the fiber reinforced epoxy resin matrix composite material comprises the following steps:
s1: weighing epoxy resin, hyperbranched amino modified polysiloxane and benzyl dimethylamine, mixing with a solvent, heating to 60-70 ℃, magnetically stirring for 2-3 hours, and cooling to obtain a first material;
s2: mixing the nano-cellulose with the first material, and grinding the mixture in a three-roll grinder to obtain a second material;
s3: adding a curing agent into the second material, heating to 75-80 ℃, uniformly stirring, putting the mixture into a vacuum drying oven while the mixture is hot, vacuumizing for 1-1.2 hours, taking out the mixture, putting the mixture into the drying oven, and curing to obtain a product;
the curing is carried out in three stages of 1 hour at 80-85 ℃,2 hours at 100-110 ℃ and 3 hours at 140-150 ℃.
2. The fiber reinforced epoxy resin based composite material according to claim 1, characterized in that: the epoxy resin is bisphenol A epoxy resin, trifunctional epoxy resin or tetrafunctional epoxy resin.
3. The fiber reinforced epoxy resin based composite material according to claim 1, characterized in that: the weight ratio of the 4, 4' diamino diphenyl sulfone to the 1-methylimidazole is 1: (1-3).
4. The fiber reinforced epoxy resin based composite material according to claim 3, characterized in that: 55 parts of epoxy resin, 25 parts of nano-cellulose, 16 parts of hyperbranched amino-modified polysiloxane, 5 parts of benzyl dimethylamine and 2.5 parts of curing agent.
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| CN113201201A (en) * | 2021-04-29 | 2021-08-03 | 国网河南省电力公司周口供电公司 | Flame-retardant high-toughness carbon fiber composite material for overhead transmission conductor |
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| CN104371275A (en) * | 2014-11-19 | 2015-02-25 | 浙江农林大学 | Nanocellulose-thermoplastic resin synergically modified epoxy resin composite material and preparation method thereof |
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