CN115044181A - Glass fiber composite material and preparation and recovery method thereof - Google Patents
Glass fiber composite material and preparation and recovery method thereof Download PDFInfo
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- CN115044181A CN115044181A CN202210314936.6A CN202210314936A CN115044181A CN 115044181 A CN115044181 A CN 115044181A CN 202210314936 A CN202210314936 A CN 202210314936A CN 115044181 A CN115044181 A CN 115044181A
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 209
- 239000002131 composite material Substances 0.000 title claims abstract description 162
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000011084 recovery Methods 0.000 title abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 146
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical class [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 102
- 239000000843 powder Substances 0.000 claims abstract description 76
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000008367 deionised water Substances 0.000 claims abstract description 51
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 51
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000000654 additive Substances 0.000 claims abstract description 19
- 230000000996 additive effect Effects 0.000 claims abstract description 19
- 229920006337 unsaturated polyester resin Polymers 0.000 claims abstract description 19
- 239000011259 mixed solution Substances 0.000 claims description 50
- 239000007788 liquid Substances 0.000 claims description 42
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 36
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 36
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 36
- 239000006185 dispersion Substances 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 18
- 235000019353 potassium silicate Nutrition 0.000 claims description 18
- 238000004064 recycling Methods 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 12
- 238000011049 filling Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 238000012216 screening Methods 0.000 claims description 7
- 239000000047 product Substances 0.000 claims 2
- 239000004342 Benzoyl peroxide Substances 0.000 claims 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical group C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims 1
- 235000019400 benzoyl peroxide Nutrition 0.000 claims 1
- 239000012043 crude product Substances 0.000 claims 1
- 239000011152 fibreglass Substances 0.000 claims 1
- 238000005452 bending Methods 0.000 description 20
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000012153 distilled water Substances 0.000 description 6
- 229920001187 thermosetting polymer Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 239000010786 composite waste Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000011978 dissolution method Methods 0.000 description 2
- 238000004901 spalling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010003549 asthenia Diseases 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- 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
- C08J11/00—Recovery or working-up of waste materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/06—Unsaturated polyesters
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- Polymers & Plastics (AREA)
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Abstract
The application discloses a glass fiber composite material and a preparation and recovery method of the glass fiber composite material, wherein the glass fiber composite material comprises the following components in parts by weight: 100 parts of unsaturated polyester resin, 4.5-8 parts of modified water glass powder, 5-10 parts of modified expanded graphite powder, 35-45 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive; the modified expanded graphite powder comprises the following components in parts by weight: 100 parts of expanded graphite powder, 0.5-1.5 parts of vinyl trimethoxy silane, 90 parts of absolute ethyl alcohol and 510 parts of deionized water.
Description
Technical Field
The application relates to the technical field of composite material preparation, in particular to a glass fiber composite material and a preparation and recovery method of the glass fiber composite material.
Background
The glass fiber composite material has excellent performances of light weight, high strength, corrosion resistance and the like, and is widely applied to various industries such as wind power, ships, buildings, rail transit and the like. However, since the glass fiber composite material has excellent properties such as high strength and good corrosion resistance, the disposal of the waste of the glass fiber composite material is also very troublesome.
With the increasing of the awareness of people on protecting the environment, the pollution problem of the thermosetting composite material waste to the environment also draws the wide attention of people. The waste of thermosetting composite materials mainly comes from defective products, leftover materials and composite material products with lost functions in the production process. Obviously, the more varieties and yields of thermoset composite waste, the more waste. At present, the recycling method of the glass fiber composite material mainly comprises a pyrolysis method, a mechanical crushing method, an incineration method, a chemical dissolution method and the like, but the methods have the problems of high energy consumption, large pollution and the like.
In addition, since the conventional glass fiber composite material has a high demand for a recycling method, it is important to develop a glass fiber composite material which has a low demand for a recycling method and can reduce energy consumption during recycling.
Aiming at the technical problem that the normal work of the glass fiber composite material can be ensured and the glass fiber composite material can be recycled at a lower temperature, an effective solution is not provided at present.
Disclosure of Invention
The disclosure provides a glass fiber composite material and a preparation and recovery method of the glass fiber composite material, which at least solve the technical problem that the prior art is lack of a method which can not only ensure the normal work of the glass fiber composite material, but also recover the glass fiber composite material at a lower temperature.
According to one aspect of the application, a glass fiber composite material is provided, which comprises the following components in parts by weight: 100 parts of unsaturated polyester resin, 4.5-8 parts of modified water glass powder, 5-10 parts of modified expanded graphite powder, 35-45 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive; the modified expanded graphite powder comprises the following components in parts by weight:
100 parts of expanded graphite powder, 0.5-1.5 parts of vinyl trimethoxy silane, 90 parts of absolute ethyl alcohol and 510 parts of deionized water.
According to another aspect of the present application, there is provided a glass fiber composite manufacturing method, including: preparing materials according to the following parts by weight: 100 parts of unsaturated polyester resin, 4.5-8 parts of modified water glass powder, 5-10 parts of modified expanded graphite powder, 35-45 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive; adding modified water glass powder, modified expanded graphite powder, glass fiber, an additive and a curing agent into unsaturated polyester resin to obtain a mixture consisting of unsaturated polyester resin, modified water glass powder, modified expanded graphite powder, glass fiber, the curing agent and the additive; and filling the mixture into a mold, and heating to prepare the glass fiber composite material.
According to another aspect of the present application, there is provided a method for recycling the glass fiber composite material according to any one of claims 1 to 3 or the glass fiber composite material prepared by the method according to any one of claims 3 to 7, comprising: crushing the glass fiber composite material into glass fiber composite material blocks with the radius smaller than 5 cm; heating the glass fiber composite material block to 180 ℃, and maintaining for 2 hours to obtain a burst glass fiber composite material block; crushing the burst glass fiber composite material block, and screening and collecting a mixture obtained by crushing to obtain a crude glass fiber product, wherein the extrusion pressure is 3 Mpa; and extruding the crude glass fiber product, and screening and collecting the extruded crude glass fiber product to obtain the recycled glass fiber, wherein the extrusion pressure is 0.8 Mpa.
The glass fiber composite material mainly comprises, by weight, 100 parts of unsaturated polyester resin, 5-10 parts of modified expanded graphite powder, 4.5-8 parts of modified water glass powder, 35-45 parts of glass fiber, 1.2 parts of a curing agent and 3 parts of an additive. Because the modified expanded graphite powder and the modified water glass powder are added in the preparation of the glass fiber composite material, and the modified expanded graphite powder and the modified water glass powder can expand after being heated to a certain temperature, the glass fiber composite material can be burst after being heated to a certain temperature. And extruding and screening the glass fiber composite material after the bursting, and collecting and obtaining the recycled glass fiber. In addition, the temperature of the glass fiber composite material added with the modified expanded graphite powder and the modified water glass powder when the glass fiber composite material is cracked is far lower than the temperature required by the pyrolysis method for recovering the glass fiber composite material. Therefore, the glass fiber composite material in the application can greatly reduce the requirement on recycling conditions, reduce the consumption of energy and avoid the pollution to the environment. In addition, the expansion temperature of the modified expanded graphite powder is 150-180 ℃, so that the glass fiber composite material cannot be cracked when being normally used for construction, and the glass fiber composite material cannot work normally. Therefore, the technical effects that the normal work of the glass fiber composite material can be ensured, the glass fiber composite material can be recycled at a lower temperature, resources required by the recycling of the glass fiber composite material are reduced, and the cost required by the recycling of the glass fiber composite material is reduced are achieved through the product structure. And the technical problem that the normal work of the glass fiber composite material can be ensured and the glass fiber composite material can be recycled at a lower temperature is solved.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic flow diagram of a method for making a glass fiber composite according to one embodiment of the present application.
Detailed Description
It should be noted that, in the present disclosure, the embodiments and features of the embodiments may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solutions of the present disclosure better understood by those skilled in the art, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing the embodiments of the disclosure herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
The application provides a glass fiber composite material, which comprises the following components in parts by weight: 100 parts of unsaturated polyester resin, 4.5-8 parts of modified water glass powder, 5-10 parts of modified expanded graphite powder, 35-45 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive; the modified expanded graphite powder comprises the following components in parts by weight: 100 parts of expanded graphite powder, 0.5-1.5 parts of vinyl trimethoxy silane, 90 parts of absolute ethyl alcohol and 510 parts of deionized water.
As described in the background art, with the increasing awareness of environmental protection, the pollution problem of the thermosetting composite material waste to the environment has attracted people's attention. The waste of thermosetting composite materials mainly comes from defective products, leftover materials and composite material products with lost functions in the production process. Obviously, the more varieties and yields of thermoset composite waste, the more waste. At present, the recycling method of the glass fiber composite material mainly comprises a pyrolysis method, a mechanical crushing method, an incineration method, a chemical dissolution method and the like, but the methods have the problems of high energy consumption, large pollution and the like. In addition, since the conventional glass fiber composite material has a high demand for a recycling method, it is important to develop a glass fiber composite material which has a low demand for a recycling method and can reduce energy consumption during recycling.
In order to solve the technical problems, the application provides a glass fiber composite material which mainly comprises 100 parts by weight of unsaturated polyester resin, 4.5-8 parts by weight of modified water glass powder, 5-10 parts by weight of modified expanded graphite powder, 1.2 parts by weight of curing agent and 3 parts by weight of additive. The modified expanded graphite powder mainly comprises 100 parts of expanded graphite powder, 0.5-1.5 parts of vinyl trimethoxy silane, 90 parts of absolute ethyl alcohol and 510 parts of deionized water.
And because the glass fiber composite material may reach a high temperature of 80 to 100 ℃ in hot summer. Therefore, if the low-temperature modified expanded graphite powder is added, the glass fiber composite material may expand in daily use, so that the glass fiber composite material cannot be normally used. When conventional methods are used to recover glass fiber composites, high temperatures above 300 ℃ are typically required. Therefore, the existing resources are wasted and the economic cost is high.
Therefore, the modified expanded graphite powder added into the glass fiber composite material has the characteristic of being capable of expanding when the initial expansion temperature (150-180 ℃) is reached. Therefore, the glass fiber composite material not only can be recycled at a lower temperature, but also can meet the temperature condition of the glass fiber composite material in normal use.
Therefore, when the glass fiber composite material needs to be recycled, the glass fiber composite material after the spalling is crushed into a glass fiber composite material block of less than 5cm, and then the glass fiber composite material is heated to 180 ℃ and maintained for 2 h. Crushing by using a mechanical extrusion mode with the extrusion pressure of 3Mpa, screening the crushed mixture, and collecting to obtain a crude glass fiber product. Then, the glass fiber is extruded by a mechanical extrusion mode with the extrusion pressure of 1.2Mpa, and is screened and collected, and finally, the recycled glass fiber is obtained.
Therefore, the technical effects that the normal work of the glass fiber composite material can be ensured, the glass fiber composite material can be recycled at a lower temperature, resources required by the recycling of the glass fiber composite material are reduced, and the cost required by the recycling of the glass fiber composite material is reduced are achieved through the product structure. And the technical problem that the normal work of the glass fiber composite material can be ensured and the glass fiber composite material can be recycled at a lower temperature is solved.
In addition, table 1 shows the weight parts data of the expanded graphite powder, deionized water, absolute ethyl alcohol, and vinyltrimethoxysilane in the modified expanded graphite powder in 6 sets of tests.
TABLE 1
Table 2 shows the parts by weight data for water glass, ammonium polyphosphate, deionized water, and vinyltrimethoxysilane in the modified water glass frits of 6 sets of tests.
TABLE 2
Table 3 shows the data of the unsaturated polyester resin, the modified water glass powder, the modified expanded graphite powder, the glass fiber, the curing agent and the additive in the glass fiber composite material in 6 experiments.
TABLE 3
Example 1:
when 1.2 parts of vinyl trimethoxy silane in the modified expanded graphite powder, 20 parts of ammonium polyphosphate in the modified water glass powder, 33 parts of deionized water, 0.5 part of vinyl trimethoxy silane, 8 parts of modified water glass powder, 7 parts of modified expanded graphite powder and 42 parts of glass fiber are used, the glass fiber composite material is prepared.
The method comprises the following steps: the preparation method comprises the following steps of preparing materials according to the weight part of the experimental group 1, wherein the water glass is 100 parts, the ammonium polyphosphate is 20 parts, the deionized water is 33 parts, and the vinyl trimethoxy silane is 0.5 part.
Step two: and dispersing ammonium polyphosphate into deionized water and stirring to obtain an ammonium polyphosphate dispersion liquid.
Step three: and adding vinyl trimethoxysilane into the ammonium polyphosphate dispersion liquid to obtain a first mixed liquid. And adding the first mixed solution into water glass to obtain a second mixed solution.
Step four: and (4) placing the second mixed solution in an environment of 60 ℃, and drying to obtain the modified water glass. And grinding the modified water glass into powder with the particle size of less than 5 mu m to prepare the modified water glass powder.
Step five: the preparation method comprises the following steps of preparing materials according to the data of the experimental group 1 by weight, wherein the expanded graphite powder comprises 100 parts of deionized water 510 parts, 90 parts of absolute ethyl alcohol and 1.2 parts of vinyl trimethoxy silane. Wherein the particle size of the used expanded graphite powder is 10-20 μm, the expansion volume is 400-500 mL/g, and the initial expansion temperature is 150-180 ℃.
Step six: and mixing 10 parts of deionized water and 90 parts of absolute ethyl alcohol to obtain a third mixed solution.
Step seven: and (3) dissolving 1.2 parts of vinyltrimethoxysilane in the third mixed solution in the fourth step to obtain a vinyltrimethoxysilane solution.
Step eight: and (3) ultrasonically dispersing 100 parts of expanded graphite powder into 500 parts of deionized water to obtain an expanded graphite powder dispersion liquid.
Step nine: and dripping the vinyl trimethoxy silane solution into the expanded graphite powder dispersion liquid to obtain a fourth mixed liquid. And slowly stirring the second mixed solution by using magnetic force, and controlling the temperature of the system to be 60 ℃. And after stirring for 1h, filtering the mixed solution, collecting expanded graphite powder, and cleaning the expanded graphite powder with distilled water. And then placing the cleaned expanded graphite powder in a vacuum oven at 6 ℃ for drying for 24 hours to finally obtain the modified expanded graphite powder.
Step ten: and dispersing 7 parts of modified expanded graphite powder, 8 parts of modified water glass powder, 42 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive which are obtained by preparation into 100 parts of unsaturated polyester resin, and uniformly mixing.
Step eleven: and filling the mixture into a mold, wherein the mold closing pressure of the mold is 2-8 Mpa. The temperature of the mould is uniformly raised to 80-90 ℃ and maintained for 60 min. And then heating the mold to 110-120 ℃, keeping the temperature for 60min, and finally cooling the mold to room temperature to obtain the glass fiber composite material.
Example 2:
when 1.3 parts of vinyl trimethoxy silane in the modified expanded graphite powder, 18 parts of ammonium polyphosphate in the modified water glass powder, 40 parts of deionized water, 3 parts of vinyl trimethoxy silane, 6 parts of modified water glass powder, 10 parts of modified expanded graphite powder and 38 parts of glass fiber are used, the glass fiber composite material is prepared.
The method comprises the following steps: the preparation method comprises the following steps of preparing materials according to the weight part of the experimental group 1, wherein the water glass is 100 parts, the ammonium polyphosphate is 18 parts, the deionized water is 40 parts, and the vinyl trimethoxy silane is 3 parts.
Step two: and dispersing ammonium polyphosphate into deionized water and stirring to obtain an ammonium polyphosphate dispersion liquid.
Step three: and adding vinyl trimethoxysilane into the ammonium polyphosphate dispersion liquid to obtain a first mixed liquid. And adding the first mixed solution into water glass to obtain a second mixed solution.
Step four: and (4) placing the second mixed solution in an environment of 60 ℃, and drying to obtain the modified water glass. And grinding the modified water glass into powder with the particle size of less than 5 mu m to prepare the modified water glass powder.
Step five: the preparation method comprises the following steps of preparing materials according to the data of the experimental group 1 by weight, wherein the expanded graphite powder comprises 100 parts of deionized water 510 parts, 90 parts of absolute ethyl alcohol and 1.3 parts of vinyl trimethoxy silane. Wherein the particle size of the used expanded graphite powder is 10-20 μm, the expansion volume is 400-500 mL/g, and the initial expansion temperature is 150-180 ℃.
Step six: and mixing 10 parts of deionized water and 90 parts of absolute ethyl alcohol to obtain a third mixed solution.
Step seven: and (3) dissolving 1.3 parts of vinyltrimethoxysilane in the third mixed solution to obtain a vinyltrimethoxysilane solution.
Step eight: and (3) ultrasonically dispersing 100 parts of expanded graphite powder into 500 parts of deionized water to obtain an expanded graphite powder dispersion liquid.
Step nine: and dripping the vinyl trimethoxy silane solution into the expanded graphite powder dispersion liquid to obtain a fourth mixed liquid. And slowly stirring the second mixed solution by using magnetic force, and controlling the temperature of the system to be 60 ℃. And after stirring for 1h, filtering the mixed solution, collecting expanded graphite powder, and cleaning the expanded graphite powder with distilled water. And then placing the cleaned expanded graphite powder in a vacuum oven at 6 ℃ for drying for 24 hours to finally obtain the modified expanded graphite powder.
Step ten: dispersing 10 parts of modified expanded graphite powder, 6 parts of modified water glass powder, 38 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive which are obtained by preparation into 100 parts of unsaturated polyester resin, and uniformly mixing.
Step eleven: and filling the mixture into a mold, wherein the mold closing pressure of the mold is 2-8 Mpa. The temperature of the mould is uniformly raised to 80-90 ℃, and the temperature is maintained for 60 min. And then heating the mold to 110-120 ℃, keeping the temperature for 60min, and finally cooling the mold to room temperature to obtain the glass fiber composite material.
Example 3:
when 1.5 parts of vinyl trimethoxy silane in the modified expanded graphite powder, 25 parts of ammonium polyphosphate in the modified water glass powder, 38 parts of deionized water, 1.5 parts of vinyl trimethoxy silane, 5 parts of modified water glass powder, 9 parts of modified expanded graphite powder and 35 parts of glass fiber are used, the glass fiber composite material is prepared.
The method comprises the following steps: the preparation method comprises the following steps of preparing materials according to the weight part of the experimental group 1, wherein the water glass is 100 parts, the ammonium polyphosphate is 25 parts, the deionized water is 38 parts, and the vinyl trimethoxy silane is 1.5 parts.
Step two: and dispersing ammonium polyphosphate into deionized water and stirring to obtain an ammonium polyphosphate dispersion liquid.
Step three: and adding vinyl trimethoxysilane into the ammonium polyphosphate dispersion liquid to obtain a first mixed liquid. And then adding the first mixed solution into water glass to obtain a second mixed solution.
Step four: and (4) placing the second mixed solution in an environment of 60 ℃, and drying to obtain the modified water glass. And grinding the modified water glass into powder with the particle size of less than 5 mu m to prepare the modified water glass powder.
Step five: the preparation method comprises the following steps of preparing materials according to the weight part data of an experimental group 1, wherein the expanded graphite powder comprises 100 parts of deionized water 510 parts, 90 parts of absolute ethyl alcohol and 1.5 parts of vinyl trimethoxy silane. Wherein the particle size of the used expanded graphite powder is 10-20 μm, the expansion volume is 400-500 mL/g, and the initial expansion temperature is 150-180 ℃.
Step six: and mixing 10 parts of deionized water and 90 parts of absolute ethyl alcohol to obtain a third mixed solution.
Step seven: and (3) dissolving 1.5 parts of vinyltrimethoxysilane in the third mixed solution in the fourth step to obtain a vinyltrimethoxysilane solution.
Step eight: and (3) ultrasonically dispersing 100 parts of expanded graphite powder into 500 parts of deionized water to obtain an expanded graphite powder dispersion liquid.
Step nine: and dripping the vinyl trimethoxy silane solution into the expanded graphite powder dispersion liquid to obtain a fourth mixed liquid. And slowly stirring the second mixed solution by using magnetic force, and controlling the temperature of the system to be 60 ℃. And after stirring for 1h, filtering the mixed solution, collecting expanded graphite powder, and cleaning the expanded graphite powder with distilled water. And then placing the cleaned expanded graphite powder in a vacuum oven at 6 ℃ for drying for 24 hours to finally obtain the modified expanded graphite powder.
Step ten: and dispersing 9 parts of modified expanded graphite powder, 5 parts of modified water glass powder, 35 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive which are obtained by preparation into 100 parts of unsaturated polyester resin, and uniformly mixing.
Step eleven: and filling the mixture into a mold, wherein the mold closing pressure of the mold is 2-8 Mpa. The temperature of the mould is uniformly raised to 80-90 ℃, and the temperature is maintained for 60 min. And then heating the mold to 110-120 ℃, keeping the temperature for 60min, and finally cooling the mold to room temperature to obtain the glass fiber composite material.
Example 4:
when 0.7 part of vinyl trimethoxy silane in the modified expanded graphite powder, 22 parts of ammonium polyphosphate in the modified water glass powder, 29 parts of deionized water, 5 parts of vinyl trimethoxy silane, 4.5 parts of modified water glass powder, 6 parts of modified expanded graphite powder and 43 parts of glass fiber are used, the glass fiber composite material is prepared.
The method comprises the following steps: the preparation method comprises the following steps of preparing materials according to the weight part of the experimental group 1, wherein the water glass is 100 parts, the ammonium polyphosphate is 22 parts, the deionized water is 29 parts, and the vinyl trimethoxy silane is 5 parts.
Step two: and dispersing ammonium polyphosphate into deionized water and stirring to obtain an ammonium polyphosphate dispersion liquid.
Step three: and adding vinyl trimethoxysilane into the ammonium polyphosphate dispersion liquid to obtain a first mixed liquid. And then adding the first mixed solution into water glass to obtain a second mixed solution.
Step four: and (4) placing the second mixed solution in an environment of 60 ℃, and drying to obtain the modified water glass. And grinding the modified water glass into powder with the particle size of less than 5 mu m to prepare the modified water glass powder.
Step five: the preparation method comprises the following steps of preparing materials according to the weight part data of the experimental group 1, wherein the expanded graphite powder comprises 100 parts of deionized water 510 parts, 90 parts of absolute ethyl alcohol and 0.7 part of vinyl trimethoxy silane. Wherein the particle size of the used expanded graphite powder is 10-20 μm, the expansion volume is 400-500 mL/g, and the initial expansion temperature is 150-180 ℃.
Step six: and mixing 10 parts of deionized water and 90 parts of absolute ethyl alcohol to obtain a third mixed solution.
Step seven: and (3) dissolving 0.7 part of vinyltrimethoxysilane in the third mixed solution in the fourth step to obtain a vinyltrimethoxysilane solution.
Step eight: and (3) ultrasonically dispersing 100 parts of expanded graphite powder into 500 parts of deionized water to obtain an expanded graphite powder dispersion liquid.
Step nine: and dripping the vinyl trimethoxy silane solution into the expanded graphite powder dispersion liquid to obtain a fourth mixed liquid. And slowly stirring the second mixed solution by using magnetic force, and controlling the temperature of the system to be 60 ℃. And after stirring for 1h, filtering the mixed solution, collecting expanded graphite powder, and cleaning the expanded graphite powder with distilled water. And then placing the cleaned expanded graphite powder in a vacuum oven at 6 ℃ for drying for 24 hours to finally obtain the modified expanded graphite powder.
Step ten: 6 parts of modified expanded graphite powder, 4.5 parts of modified water glass powder, 43 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive which are prepared are dispersed in 100 parts of unsaturated polyester resin and uniformly mixed.
Step eleven: and filling the mixture into a mold, wherein the mold closing pressure of the mold is 2-8 Mpa. The temperature of the mould is uniformly raised to 80-90 ℃, and the temperature is maintained for 60 min. And then heating the mold to 110-120 ℃, keeping the temperature for 60min, and finally cooling the mold to room temperature to obtain the glass fiber composite material.
Example 5:
when the amount of the vinyltrimethoxysilane in the modified expanded graphite powder is 0.5 part, the amount of the ammonium polyphosphate in the modified water glass powder is 13 parts, the amount of the deionized water is 20 parts, the amount of the vinyltrimethoxysilane in the modified expanded graphite powder is 4 parts, the amount of the modified water glass powder is 7 parts, the amount of the modified expanded graphite powder is 5 parts, and the amount of the glass fiber in the modified expanded graphite powder is 39 parts, the glass fiber composite material is prepared.
The method comprises the following steps: the preparation method comprises the following steps of preparing materials according to the weight part of the experimental group 1, wherein the water glass is 100 parts, the ammonium polyphosphate is 13 parts, the deionized water is 20 parts, and the vinyl trimethoxy silane is 4 parts.
Step two: and dispersing ammonium polyphosphate into deionized water and stirring to obtain an ammonium polyphosphate dispersion liquid.
Step three: and adding vinyl trimethoxysilane into the ammonium polyphosphate dispersion liquid to obtain a first mixed liquid. And then adding the first mixed solution into water glass to obtain a second mixed solution.
Step four: and (4) placing the second mixed solution in an environment of 60 ℃, and drying to obtain the modified water glass. And grinding the modified water glass into powder with the particle size of less than 5 mu m to prepare the modified water glass powder.
Step five: the preparation method comprises the following steps of preparing materials according to the data of the experimental group 1, wherein the expanded graphite powder comprises 100 parts of deionized water 510 parts, 90 parts of absolute ethyl alcohol and 0.5 part of vinyl trimethoxy silane. Wherein the particle size of the used expanded graphite powder is 10-20 μm, the expansion volume is 400-500 mL/g, and the initial expansion temperature is 150-180 ℃.
Step six: and mixing 10 parts of deionized water and 90 parts of absolute ethyl alcohol to obtain a third mixed solution.
Step seven: and (3) dissolving 0.5 part of vinyltrimethoxysilane in the third mixed solution in the fourth step to obtain a vinyltrimethoxysilane solution.
Step eight: and (3) ultrasonically dispersing 100 parts of expanded graphite powder into 500 parts of deionized water to obtain an expanded graphite powder dispersion liquid.
Step nine: and dripping the vinyl trimethoxy silane solution into the expanded graphite powder dispersion liquid to obtain a fourth mixed liquid. And slowly stirring the second mixed solution by using magnetic force, and controlling the temperature of the system to be 60 ℃. And after stirring for 1h, filtering the mixed solution, collecting expanded graphite powder, and cleaning the expanded graphite powder with distilled water. And then placing the cleaned expanded graphite powder in a vacuum oven at 6 ℃ for drying for 24 hours to finally obtain the modified expanded graphite powder.
Step ten: 5 parts of modified expanded graphite powder, 7 parts of modified water glass powder, 39 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive which are prepared are dispersed in 100 parts of unsaturated polyester resin and uniformly mixed.
Step eleven: and filling the mixture into a mold, wherein the mold closing pressure of the mold is 2-8 Mpa. The temperature of the mould is uniformly raised to 80-90 ℃, and the temperature is maintained for 60 min. And then heating the mold to 110-120 ℃, keeping the temperature for 60min, and finally cooling the mold to room temperature to obtain the glass fiber composite material.
Example 6:
when 1 part of vinyl trimethoxy silane in the modified expanded graphite powder, 10 parts of ammonium polyphosphate in the modified water glass powder, 22 parts of deionized water, 2 parts of vinyl trimethoxy silane, 6.5 parts of modified water glass powder, 8 parts of modified expanded graphite powder and 45 parts of glass fiber are used, the glass fiber composite material is prepared.
The method comprises the following steps: the preparation method comprises the following steps of preparing materials according to the weight part of the experimental group 1, wherein the water glass is 100 parts, the ammonium polyphosphate is 10 parts, the deionized water is 22 parts, and the vinyl trimethoxy silane is 2 parts.
Step two: and dispersing ammonium polyphosphate into deionized water and stirring to obtain an ammonium polyphosphate dispersion liquid.
Step three: and adding vinyl trimethoxysilane into the ammonium polyphosphate dispersion liquid to obtain a first mixed liquid. And adding the first mixed solution into water glass to obtain a second mixed solution.
Step four: and (4) placing the second mixed solution in an environment of 60 ℃, and drying to obtain the modified water glass. And grinding the modified water glass into powder with the particle size of less than 5 mu m to prepare the modified water glass powder.
Step five: the preparation method comprises the following steps of preparing materials according to the data of the experimental group 1 by weight, wherein the expanded graphite powder comprises 100 parts of deionized water 510 parts, 90 parts of absolute ethyl alcohol and 1 part of vinyl trimethoxy silane. Wherein the particle size of the used expanded graphite powder is 10-20 μm, the expansion volume is 400-500 mL/g, and the initial expansion temperature is 150-180 ℃.
Step six: and mixing 10 parts of deionized water and 90 parts of absolute ethyl alcohol to obtain a third mixed solution.
Step seven: and (3) dissolving 1 part of vinyltrimethoxysilane in the third mixed solution in the fourth step to obtain a vinyltrimethoxysilane solution.
Step eight: and (3) ultrasonically dispersing 100 parts of expanded graphite powder into 500 parts of deionized water to obtain an expanded graphite powder dispersion liquid.
Step nine: and dripping the vinyl trimethoxy silane solution into the expanded graphite powder dispersion liquid to obtain a fourth mixed liquid. And slowly stirring the second mixed solution by using magnetic force, and controlling the temperature of the system to be 60 ℃. And after stirring for 1 hour, filtering the mixed solution, collecting expanded graphite powder, and cleaning the expanded graphite powder with distilled water. And then putting the cleaned expanded graphite powder into a vacuum oven at 6 ℃ for drying for 24 hours to finally obtain the modified expanded graphite powder.
Step ten: 8 parts of modified expanded graphite powder, 6.5 parts of modified water glass powder, 45 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive which are prepared are dispersed in 100 parts of unsaturated polyester resin and uniformly mixed.
Step eleven: and filling the mixture into a mold, wherein the mold closing pressure of the mold is 2-8 Mpa. The temperature of the mould is uniformly raised to 80-90 ℃, and the temperature is maintained for 60 min. And then heating the mold to 110-120 ℃, keeping the temperature for 60min, and finally cooling the mold to room temperature to obtain the glass fiber composite material.
The glass fiber composite material prepared in the 6 groups of examples is recycled, and the recycling method comprises the following steps:
the method comprises the following steps: and crushing the glass fiber composite material into a glass fiber composite material block by using a crusher. Wherein the diameter of the glass fiber composite block needs to be less than 5 cm.
Step two: and (3) placing the glass fiber composite material block in a heating box, heating to 180 ℃, and maintaining the whole heating process for 2 hours to prepare the spalling glass fiber composite material block.
Step three: and crushing the burst glass fiber composite material blocks by adopting a mechanical extrusion mode, and collecting a mixture of the crushed glass fiber composite materials to obtain a crude glass fiber product. Wherein the extrusion pressure is 8 MPa.
Step four: and extruding, screening and collecting the obtained crude glass fiber product by adopting a mechanical extrusion mode to finally obtain the recycled glass fiber, wherein the extrusion pressure is 0.8 Mpa.
After obtaining the glass fiber that can be recycled, the recovery rate of the glass fiber was further examined. The first set was example 1, the second set was example 2, the third set was example 3, the fourth set was example 4, the fifth set was example 5, and the sixth set was example 6.
The results obtained are shown in table 4:
TABLE 4
The recovery rate of glass fibers is the weight of the glass fibers obtained by recovery/the weight of the glass fibers contained in the glass fiber composite material before recovery. The residual resin content was determined according to the method provided in the national standard GB/T2577-2005. Therefore, the recovery rate of the glass fiber can reach 82% at most and the content of the residual resin can reach 2.7% at least after the modified expanded graphite powder is added. Therefore, the modified expanded graphite powder is added in the process of preparing the glass fiber composite material, and the effects of improving the recovery rate of the glass fiber and reducing the content of residual resin on the glass fiber can be achieved.
The glass fiber recovery and residual resin content of the glass fiber composite material without the addition of the modified expanded graphite powder and the glass fiber recovery and residual resin content of the glass fiber composite material without the addition of the modified water glass powder were compared with each other using example 4 as a control. The first group is a glass fiber composite material without adding modified water glass powder, the second group is a glass fiber composite material without adding modified expanded graphite powder, and the third group is the glass fiber composite material prepared in the embodiment 4. The comparison results are detailed in table 5:
TABLE 5
As can be seen from table 5, when the glass fiber composite material without the modified water glass powder was recovered by the above recovery method, the recovery rate of the glass fiber was only 7%, which indicates that the glass fiber composite material without the modified water glass powder could hardly recover the glass fiber. When the recovery method is used for recovering the glass fiber composite material without adding the modified expanded graphite powder and the modified water glass powder, the recovery of the glass fiber cannot be realized. When the glass fiber composite material without the modified expanded graphite powder is recycled by the method, the recovery rate of the glass fiber can only reach 12 percent, which shows that the glass fiber composite material without the modified expanded graphite powder can hardly realize the recovery of the glass fiber. When the glass fiber composite material added with the modified expanded graphite powder and the modified water glass powder is recovered by the recovery method, the recovery rate of the glass fiber composite material is 69 percent, and the content of the residual resin is 2.9 percent. Therefore, the recovery rate of the glass fiber composite material can be greatly improved by adding the modified expanded graphite powder, and the residual resin content of the glass fiber is reduced.
Further, the bending strength of the glass fiber composite material of the above 6 examples and the bending strength of the glass fiber composite material to which the modified expanded graphite powder was not added are shown in Table 6. The first group was example 1, the second group was example 2, the third group was example 3, the fourth group was example 4, the fifth group was example 5, the sixth group was example 6, and the seventh group was the flexural strength of the glass fiber composite material to which the modified expanded graphite powder was not added. As shown in table 6:
TABLE 6
Wherein the bending strength of the glass fiber composite material is determined according to the method provided by the national standard GB/T2567-2008.
As is clear from Table 6, the glass fiber composite materials of examples 1 to 6 all had high flexural strength. Compared with the glass fiber composite material which is not added with the modified expanded graphite powder and the modified sodium silicate powder, the bending strength of the first group of glass fiber composite materials which are added with the modified expanded graphite powder and the modified sodium silicate powder is reduced by 2.6 percent; compared with the glass fiber composite material which is not added with the modified expanded graphite powder and the modified sodium silicate powder, the bending strength of the second group of glass fiber composite material which is added with the modified expanded graphite powder and the modified sodium silicate powder is reduced by 3.0 percent; the bending strength of the third group of glass fiber composite materials added with the modified expanded graphite powder and the modified water glass powder is reduced by 2.7 percent compared with the glass fiber composite materials not added with the modified expanded graphite powder and the modified water glass powder; the bending strength of the fourth group of glass fiber composite materials added with the modified expanded graphite powder and the modified water glass powder is reduced by 1.9 percent compared with the glass fiber composite materials not added with the modified expanded graphite powder and the modified water glass powder; the bending strength of the glass fiber composite material added with the modified expanded graphite powder and the modified water glass powder is reduced by 2.1 percent compared with the glass fiber composite material not added with the modified expanded graphite powder and the modified water glass powder; and compared with the glass fiber composite material without the modified expanded graphite powder and the modified water glass powder, the bending strength of the glass fiber composite material with the modified expanded graphite powder and the modified water glass powder is reduced by 1.8 percent.
Therefore, it can be seen from the above data that the bending strength of the glass fiber composite material added with the modified expanded graphite powder and the modified water glass powder is reduced to a low extent compared to the bending strength of the glass fiber composite material not added with the modified expanded graphite powder and the modified water glass powder, and there is substantially no change in the bending strength.
Table 7 shows the bending strength of the glass fiber composite material to which the modified water glass powder was not added, the bending strength of the glass fiber composite material to which the modified water glass powder and the modified expanded graphite powder were not added, the bending strength of the glass fiber composite material to which the modified expanded graphite powder and the modified water glass powder were added, and the bending strength of the glass fiber composite material in group 4 example.
TABLE 7
Wherein the bending strength of the glass fiber composite material is determined according to the method provided by the national standard GB/T2567-2008.
As can be seen from table 7, the bending strength of the glass fiber composite material added with the unmodified expanded graphite powder and the modified water glass powder was reduced by 15.3% compared with the glass fiber composite material added with the unmodified graphite powder. Compared with the glass fiber composite material added with the modified water glass powder and the modified expanded graphite powder, the bending strength of the glass fiber composite material added with the unmodified expanded graphite powder and the modified water glass powder is reduced by 14.8 percent. Compared with the glass fiber composite material without the modified expanded graphite powder, the bending strength of the glass fiber composite material added with the modified water glass powder and the modified expanded graphite powder is only reduced by 0.6 percent. Therefore, the vinyltrimethoxysilane modified expanded graphite powder can better retain the strength of the glass fiber composite material, so that the strength loss of the glass fiber composite material is smaller.
Therefore, the technical effects that the normal work of the glass fiber composite material can be ensured, the glass fiber composite material can be recycled at a lower temperature, resources required by the recycling of the glass fiber composite material are reduced, and the cost required by the recycling of the glass fiber composite material is reduced are achieved through the product structure. Further solves the technical problem that the prior art is lack of a method which can not only ensure the normal work of the glass fiber composite material, but also recover the glass fiber composite material at a lower temperature.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. The glass fiber composite material is characterized by comprising the following components in parts by weight:
100 parts of unsaturated polyester resin, 4.5-8 parts of modified water glass powder, 5-10 parts of modified expanded graphite powder, 35-45 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive;
the modified expanded graphite powder comprises the following components in parts by weight:
100 parts of expanded graphite powder, 0.5-1.5 parts of vinyl trimethoxy silane, 90 parts of absolute ethyl alcohol and 510 parts of deionized water.
2. The glass fiber composite material as claimed in claim 1, wherein the modified water glass powder comprises the following components in parts by weight:
100 parts of water glass, 10-25 parts of ammonium polyphosphate, 0.5-5 parts of vinyl trimethoxy silane and 20-40 parts of deionized water.
3. The fiberglass composite of claim 1, wherein the curing agent is benzoyl peroxide.
4. A preparation method of a glass fiber composite material is characterized by comprising the following steps:
preparing materials according to the following parts by weight: 100 parts of unsaturated polyester resin, 4.5-8 parts of modified water glass powder, 5-10 parts of modified expanded graphite powder, 35-45 parts of glass fiber, 1.2 parts of curing agent and 3 parts of additive;
adding the modified water glass powder, the modified expanded graphite powder, the glass fiber, the additive and the curing agent into the unsaturated polyester resin to obtain a mixture consisting of the unsaturated polyester resin, the modified water glass powder, the modified expanded graphite powder, the glass fiber, the curing agent and the additive; and
and filling the mixture into a mold for heating to prepare the glass fiber composite material.
5. The method according to claim 4, wherein the step of filling the mixture into a mold and heating the mold to obtain the glass fiber composite material comprises the steps of:
filling the mixture into a mold;
uniformly heating the die to 80-90 ℃ under the condition that the die closing pressure of the die is 2-8 Mpa, and heating the die at the temperature of 80-90 ℃ in a first period; and
and heating the mold to 110-120 ℃, and heating the mold at the temperature of 110-120 ℃ in the second period.
6. The method of claim 5, wherein the water glass frit is prepared, and wherein preparing the water glass frit comprises:
preparing materials according to the following parts by weight: 100 parts of water glass, 10-25 parts of ammonium polyphosphate, 0.5-5 parts of vinyl trimethoxy silane and 20-40 parts of deionized water;
dispersing the ammonium polyphosphate in the deionized water to obtain an ammonium polyphosphate dispersion liquid;
adding the vinyl trimethoxy silane into the ammonium polyphosphate dispersion liquid to obtain a first mixed liquid;
adding the first mixed solution into the water glass to obtain a second mixed solution;
placing the second mixed solution in an environment of 60 ℃, standing and drying to obtain modified water glass; and
and grinding the modified water glass into powder with the particle size of less than 5 mu m to obtain the modified water glass powder.
7. The method of claim 5, wherein the modified expanded graphite powder is prepared and the operation of preparing the modified expanded graphite powder comprises:
preparing materials according to the following weight fractions: 100 parts of expanded graphite powder, 0.5-1.5 parts of vinyl trimethoxy silane, 90 parts of absolute ethyl alcohol and 510 parts of deionized water;
mixing the deionized water and the absolute ethyl alcohol to obtain a third mixed solution, wherein the deionized water accounts for 10 parts;
dissolving the vinyltrimethoxysilane in the third mixed solution to obtain a vinyltrimethoxysilane solution;
dispersing the expanded graphite powder in the deionized water to obtain an expanded graphite powder dispersion liquid, wherein the deionized water accounts for 500 parts;
dripping the vinyl trimethoxy silane solution into the expanded graphite powder dispersion liquid to obtain a fourth mixed liquid;
stirring the fourth mixed solution, and heating the fourth mixed solution in the stirring process; and
and filtering the fourth mixed solution to obtain the modified expanded graphite powder.
8. A method for recycling the glass fiber composite material according to any one of claims 1 to 3 and the glass fiber composite material prepared by the method according to any one of claims 3 to 7, comprising:
crushing the glass fiber composite material into glass fiber composite material blocks with the diameter of less than 5 cm;
heating the glass fiber composite material block to 180 ℃, and maintaining for 2 hours to obtain a spalled glass fiber composite material block;
crushing the fractured glass fiber composite material block, and screening and collecting a mixture obtained by crushing to obtain a glass fiber crude product, wherein the extrusion pressure is 3 Mpa; and
and extruding the crude glass fiber product, and screening and collecting the extruded crude glass fiber product to obtain the recycled glass fiber, wherein the extrusion pressure is 0.8 Mpa.
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