CN103408895A - Preparation method of graphene/epoxy resin composite material - Google Patents

Preparation method of graphene/epoxy resin composite material Download PDF

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Publication number
CN103408895A
CN103408895A CN2013101372030A CN201310137203A CN103408895A CN 103408895 A CN103408895 A CN 103408895A CN 2013101372030 A CN2013101372030 A CN 2013101372030A CN 201310137203 A CN201310137203 A CN 201310137203A CN 103408895 A CN103408895 A CN 103408895A
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graphene
preparation
graphite
epoxy resin
composite material
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CN2013101372030A
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宋怀河
马兆昆
韩韬
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Changzhou Institute for Advanced Materials Beijing University of Chemical Technology
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Changzhou Institute for Advanced Materials Beijing University of Chemical Technology
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Abstract

The invention provides a preparation method of a graphene/epoxy resin composite material. The method comprises the following steps of firstly, preparing graphite oxide through a hummer method, and ultrasonically treating the graphite oxide to obtain graphene; and then, carrying out ultrasonic dispersion in an acetone solution, adding an epoxy resin matrix, and carrying out further ultrasonic stirring treatment, vacuumizing and adding a curing agent, pouring and heating after the vacuum treatment to obtain the graphene/epoxy resin composite material. When the content of graphene in the material is 0.5%, the tensile strength of the material is up to 78.084 MPa; when the graphite content gradually increases from 0.1% to 3%, the tensile strength firstly increases and then decreases, and reaches to 0.5% best, the tensile strength is increased by 51.7% compared with pure resin, and the material has good mechanical properties.

Description

A kind of preparation method of Graphene epoxy resin composite material
Technical field
The present invention relates to a kind of Graphene epoxy resin composite material preparation method.
Background technology
Graphene is with its excellent mechanical property, thermal property, chemical properties etc. are the concern of scientific circles extremely, particularly Graphene is owing to having very high mechanical property, if as packing material, add the mechanical property that can greatly promote polymer materials in polymeric matrix to, thereby the mechanical property of change polymkeric substance itself can not meet the situation of actual needs.Epoxy resin is owing to having good chemical property and physicals simultaneously, price is low, good with various material binding performances, and technological flexibility is that other thermosetting material can not be compared, can be used as the different field such as coating, tackiness agent, composite resin matrix, electronic package material and all brought into play huge effect.If carry out Graphene and resin material compound, due to both consistencies, can between bi-material, generation can become ideal interface, the mechanical property of Graphene excellence and thermal property are fully played like this, thereby can be as reinforcement, play the function that strengthens polymer matrix composites, prepare the polymer matrix composites of mechanical property and thermal property excellence.Therefore studying the Graphene epoxy resin composite material has very wide prospect.
In world wide, many scientific workers have successfully prepared Graphene reinforcement matrix material, and have studied the interfacial interaction between matrix and reinforcement Graphene.The people such as Koratkar prepare and study graphene composite material.He has also prepared Single Walled Carbon Nanotube simultaneously, multi-wall carbon nano-tube composite material contrasts, and carries out performance test and comparison with three kinds of matrix materials that content is all 0.1 ± 0.002%.Result shows that the performance of graphene composite material is apparently higher than carbon nano tube compound material.Graphene than carbon nanotube the superiority on mechanical property may with the high-specific surface area of Graphene, simultaneously between obturator and matrix, bonding makes both interlock due to the configuration of surface of fold, these all make the grapheme material mechanical property fine.Graphene also can improve the toughness of matrix material, because when Graphene is subjected to load, has high modulus in flexure, can absorb energy [Koratkar et al, Enhanced mechanical properties of nanocomposites at Low graphene Content, acsnano, 2009:3:3884].The people such as Yu have prepared the epoxy group(ing) heat interfacial material with few sheet layer graphene.They study discovery.They find that by the thermal conductivity testing research graphene film that thickness is less than 2nm is suitable as the heat conductive filler of epoxy resin very much, the Graphene of interpolation 25% can obtain the matrix material that thermal conductivity is 6.44W/ (mk), thermal conductivity has improved 3000%[Yu A et al than virgin resin, Graphite nanoplatelet-epoxy composite thermal interface materials, Phys.Chem.C, 2007:111:7565].But at present prepared polymer matrix composite, the dispersion of Graphene is not very desirable, this is because Graphene is wetting ability, can not in non-aqueous solution, directly peel off dispersion, and abundant not enough to peeling off of Graphene, can not form the seldom even Graphene of monolithic layer of lamella, when the Graphene of preparation reduces in the aqueous solution simultaneously, irreversible cohesion can occur, make in matrix dispersed bad.
Summary of the invention
The present invention is directed to the problems referred to above of prior art, provide a kind of Graphene and epoxy resin compound preparation method.Make in the steps below:
Step 1: take the 2g synthetic graphite, add in the there-necked flask that the 250ml vitriol oil is housed, want mechanical stirring in the process added, then claim the NaNO of 5g 3Be added among the there-necked flask that is mixed with sulfuric acid and graphite.Mechanical stirring reaction 1h in room temperature.Afterwards, in system, add 10gKMnO 4, added in two hours.Continue to stir 72h again, then stop stirring, after cooling, add appropriate deionized water in there-necked flask, approximately about 200ml, about 15min adds.Finally drip 30% hydrogen peroxide, until solution is by reddish brown flavescence.Use respectively afterwards dilute hydrochloric acid and deionized water wash, until sulphate-containing ion not in solution, and be washed till neutrality.And then baking 12h makes artificial graphite oxide under 70 ℃.;
Step 2: get step 1 gained graphite oxide and put into fast the retort furnace thermal treatment 15s that has been preheating to 1050 ℃, and then disperse in solvent, can obtain Graphene.
Step 3: first the Graphene of preparation is added to a certain proportion of acetone soln, ultrasonic agitation under condition of ice bath, then add a certain proportion of epoxy resin, continue ultrasonic agitation, the heating in water bath magnetic agitation is removed acetone solvent wherein again, adds solidifying agent after vacuumizing afterwards processing, after stirring, vacuumizes processing again, pour into a mould heating, obtain the matrix material batten.Finally with hydrazine, matrix material is reduced.
The further preferred version of the present invention is: described graphite is selected from large particle diameter synthetic graphite (200 order), small particle size synthetic graphite (200 order), a kind of in natural graphite.
The further preferred version of the present invention is: the described method for preparing graphite oxide is selected from a kind of in hummer method, Standenmaier method.
The further preferred version of the present invention is: described organic solvent is selected from a kind of in ethanol, acetone, NMP.
The further preferred version of the present invention is: the treatment process of described graphite oxide is selected from a kind of in ultrasonic method, dilatometry.
The present invention utilizes the standby graphite oxide of hummer legal system to carry out ultrasonic method and processes and to have prepared Graphene.The standby oxidized graphite flake layer of Hummer legal system has the fold-type structure, on lamella, oxygen level is large simultaneously, be that on sheet surfaces,, than horn of plenty, there is good dispersity in functional group in pure water, avoided simultaneously destroying more serious with the standby graphite oxide carbon-coating of Standenmaier legal system.To preparing graphite oxide, carry out supersound process, extent of exfoliation is relatively high, in process due to ultrasonic separation, chemical transformation does not occur simultaneously, so the preparation graphene sheet layer on still with oxygen-containing functional group, avoided dilatometry to process the deoxidation of rear oxidation graphite, the decomposition of a large amount of functional groups, thus in compound with the link property variation of epoxy resin-matrix body interface.By controlling the time of compound tense ultrasonic agitation, control the reunion of graphene sheet layer after disperseing in addition.The content of the standby graphite oxide of Hummer legal system preparation after ultrasonic method is processed is that 0.5% matrix material is that the 51.7%. mechanical property is taken on a new look greatly than the tensile strength increase rate of virgin resin.And the characteristics such as the method synthesis route is simple, reaction conditions is gentle, raw material sources are abundant, selectable range is wide, have commercial applications prospect well.
The accompanying drawing explanation
Accompanying drawing 1 is Graphene scanning electron microscope diagram (SEM) figure after the standby graphene oxide ultrasonic method of hummer legal system is processed.
Accompanying drawing 2 is 0.5% Graphene epoxy resin composite material profile scanning electron microscope picture (SEM) figure for content.
Accompanying drawing 3 is for content is respectively 0,0.3%, and the infrared spectrogram (FT-IR) of 0.5% Graphene epoxy resin composite material is schemed.
Accompanying drawing 4 is for content is respectively 0,0.1%, the tensile strength curve figure of 0.2%, 0.5%, 1%, 2%, 3% Graphene epoxy resin composite material.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples:
Embodiment 1
Take the 2g synthetic graphite, add in the there-necked flask that the 250ml vitriol oil is housed, want mechanical stirring in the process added, then claim the NaNO of 5g 3Be added among the there-necked flask that is mixed with sulfuric acid and graphite.Mechanical stirring reaction 1h in room temperature.Afterwards, in system, add 10gKMnO 4, added in two hours.Continue to stir 72h again, then stop stirring, after cooling, add appropriate deionized water in there-necked flask, approximately about 200ml, about 15min adds.Finally drip 30% hydrogen peroxide, until solution is by reddish brown flavescence.Use respectively afterwards dilute hydrochloric acid and deionized water wash, until sulphate-containing ion not in solution, and be washed till neutrality.And then baking 12h makes artificial graphite oxide under 70 ℃.Graphite oxide is put into fast and has been preheating to 1050 ℃ and processes 15s, obtain Graphene.By weight 5:1000, take 0.05g Graphene and 10g epoxy resin, the 0.5g Graphene is dissolved in acetone, under condition of ice bath with 6 cycles of the ultrasonic dispersion of cell pulverization machine (being 2376s), then add 10g epoxy resin, continuation is by cell pulverization and carry out 20 cycles of ultrasonic agitation (7920s), and then magnetic agitation is removed acetone in the water-bath of 70 ℃.After in the vacuum drying oven of 70 ℃, vacuumizing 2h, add the 2-ethyl 4-methylimidazole of 0.6g in resin, hand operated mixing 5min, in vacuum drying oven, vacuumize again and process 20min, then carry out casting, finally at 80 ℃ of 1h, 120 ℃ of 3h heat treated obtain matrix material.
As accompanying drawing 1 scanning electron microscope diagram (SEM), the analysis showed that the Graphene extent of exfoliation obtained is higher, lamella is thinner; The analysis showed that as accompanying drawing 2 scanning electron microscope diagrams (SEM) in the product section obtained that Graphene disperses better, the pleated structure of Graphene makes the Graphene can be fine with the hinge ability of resin group simultaneously; As accompanying drawing 3 infrared spectrograms (FT-IR) analytical results, show, in the place that wave number is 1108.28, formed the vibration peak of ester bond, mean to have formed the crosslinked of new key between Graphene and epoxy resin, interface junction credit union is tightr.As the accompanying drawing 4 tensile strength curve figure matrix material tensile strength that to show at content be 0.5%, be 78.084MPa.
Embodiment 2
Working method is with embodiment 1, and difference is to take 0.02g Graphene and 10g epoxy resin by weight 2:1000, and all the other conditions are constant, finally obtains content and be 0.2% Graphene epoxy resin composite material.Through infrared spectrogram (FT-IR) analytical results and surface sweeping electron micrograph, confirm, between Graphene and epoxy resin, formed the chemical bond of ester bond, interface is in conjunction with tight.Graphene disperses to teach in matrix.Content is that the tensile strength of 0.2% Graphene epoxy resin composite material is 56.345MPa.
Embodiment 3
Working method is with embodiment 1, and difference is to take 0.2g Graphene and 10g epoxy resin by weight 2:100, and all the other conditions are constant, finally obtains content and be 2% Graphene epoxy resin composite material.Through infrared spectrogram (FT-IR) analytical results and surface sweeping electron micrograph, confirm, between Graphene and epoxy resin, formed the chemical bond of ester bond, interface is in conjunction with tight.Graphene disperses in matrix be not very desirable, and more reunion is arranged.Content is that the tensile strength of 2% Graphene epoxy resin composite material is 54.574MPa.
Embodiment 4
Working method is with embodiment 1, and difference is, with 10 cycles of the ultrasonic dispersion of cell pulverization machine (being 3960s), all the other conditions are constant under condition of ice bath, finally obtains content and be 0.5% Graphene epoxy resin composite material.Through scanning electronic microscope (SEM) photo, confirm, the Graphene in more ultrasonic 10 cycles of the Graphene in ultrasonic 6 cycles is scattered, the graphene sheet layer in ultrasonic 6 cycles is approximately 2.9 microns wide, and the graphene sheet layer in ultrasonic 10 cycles is approximately 3.96 microns wide.
Above preferred embodiment of the present invention is illustrated, but the present invention is not limited to described embodiment, those of ordinary skill in the art also can make all modification be equal to or replacement under the prerequisite without prejudice to spirit of the present invention, the modification that these are equal to or replacement all are included in the application's claim limited range.

Claims (6)

1. the preparation method of a conducting polymer-based nanometer carbon fibers is characterized in that making by following method:
Step 1: take the 2g synthetic graphite, add in the there-necked flask that the 250ml vitriol oil is housed, want mechanical stirring in the process added, then claim the NaNO of 5g 3Be added among the there-necked flask that is mixed with sulfuric acid and graphite.Mechanical stirring reaction 1h in room temperature.Afterwards, in system, add 10gKMnO 4, added in two hours.Continue to stir 72h again, then stop stirring, after cooling, add appropriate deionized water in there-necked flask, approximately about 200ml, about 15min adds.Finally drip 30% hydrogen peroxide, until solution is by reddish brown flavescence.Use respectively afterwards dilute hydrochloric acid and deionized water wash, until sulphate-containing ion not in solution, and be washed till neutrality.And then baking 12h makes artificial graphite oxide under 70 ℃;
Step 2: get step 1 gained graphite oxide and put into fast the retort furnace thermal treatment 15s that has been preheating to 1050 ℃, and then disperse in solvent, can obtain Graphene;
Step 3: first the Graphene of preparation is added to a certain proportion of acetone soln, ultrasonic agitation under condition of ice bath, then add a certain proportion of epoxy resin, continue ultrasonic agitation, the heating in water bath magnetic agitation is removed acetone solvent wherein again, adds solidifying agent after vacuumizing afterwards processing, after stirring, vacuumizes processing again, pour into a mould heating, obtain the matrix material batten.Finally with hydrazine, matrix material is reduced.
2. the preparation method of conducting polymer-based nanometer carbon fibers as claimed in claim 1, it is characterized in that: described graphite is selected from large particle diameter synthetic graphite (200 order), small particle size synthetic graphite (200 order), a kind of in natural graphite.
3. the preparation method of conducting polymer-based nanometer carbon fibers as claimed in claim 1 is characterized in that: the described method for preparing graphite oxide is selected from a kind of in hummer method, Standenmaier method.
4. the preparation method of conducting polymer-based nanometer carbon fibers as claimed in claim 1 is characterized in that: described organic solvent is selected from a kind of in ethanol, acetone, NMP.
5. the preparation method of conducting polymer-based nanometer carbon fibers as claimed in claim 1 is characterized in that: the treatment process of described graphite oxide is selected from a kind of in ultrasonic method, dilatometry.
6. one kind by the described method gained of claim 1 to 5 Graphene epoxy resin composite material.
CN2013101372030A 2013-04-18 2013-04-18 Preparation method of graphene/epoxy resin composite material Pending CN103408895A (en)

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Cited By (8)

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CN104140639A (en) * 2014-08-01 2014-11-12 黑龙江大学 Method for preparing graphene/epoxy resin composite
CN104530653A (en) * 2014-12-26 2015-04-22 黑龙江大学 Preparation method of epoxy resin/graphene/nano copper composite material
CN104845009A (en) * 2015-05-19 2015-08-19 中国科学院化学研究所 Fluorine resin/graphene composite material with isolation structure and preparation method and application thereof
CN105837790A (en) * 2016-06-20 2016-08-10 山东欧铂新材料有限公司 Preparation method of graphene modified epoxy resin
CN106449952A (en) * 2016-10-09 2017-02-22 常州市鼎日环保科技有限公司 Preparation method for LED packaging material
WO2018205336A1 (en) * 2017-05-12 2018-11-15 深圳市华星光电技术有限公司 Led packaging material and preparation method
CN109852002A (en) * 2019-01-02 2019-06-07 浙江华正新材料股份有限公司 A kind of preparation method of high-strength light laminated composite board material
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104140639A (en) * 2014-08-01 2014-11-12 黑龙江大学 Method for preparing graphene/epoxy resin composite
CN104140639B (en) * 2014-08-01 2016-08-24 黑龙江大学 A kind of preparation method of Graphene/epoxy resin composite material
CN104530653A (en) * 2014-12-26 2015-04-22 黑龙江大学 Preparation method of epoxy resin/graphene/nano copper composite material
CN104845009B (en) * 2015-05-19 2018-03-23 中国科学院化学研究所 Fluororesin/graphene composite material with isolation structure and preparation method and application
CN104845009A (en) * 2015-05-19 2015-08-19 中国科学院化学研究所 Fluorine resin/graphene composite material with isolation structure and preparation method and application thereof
CN105837790A (en) * 2016-06-20 2016-08-10 山东欧铂新材料有限公司 Preparation method of graphene modified epoxy resin
CN106449952A (en) * 2016-10-09 2017-02-22 常州市鼎日环保科技有限公司 Preparation method for LED packaging material
WO2018205336A1 (en) * 2017-05-12 2018-11-15 深圳市华星光电技术有限公司 Led packaging material and preparation method
US20180366624A1 (en) * 2017-05-12 2018-12-20 Shenzhen China Star Optoelectronics Technology Co., Ltd. Led packaging material and manufacturing method of the same
US10418531B2 (en) 2017-05-12 2019-09-17 Shenzhen China Star Optoelectronics Technology Co., Ltd. LED packaging material and manufacturing method of the same
US10461228B2 (en) 2017-05-12 2019-10-29 Shenzhen China Star Optoelectronics Technology Co., Ltd LED packaging material and manufacturing method of the same
US10522724B2 (en) 2017-05-12 2019-12-31 Shenzhen China Star Optoelectronics Technology Co., Ltd LED packaging material and manufacturing method of the same
CN109852002A (en) * 2019-01-02 2019-06-07 浙江华正新材料股份有限公司 A kind of preparation method of high-strength light laminated composite board material
CN110615970A (en) * 2019-09-16 2019-12-27 海安南京大学高新技术研究院 High-quality graphene, heat-conducting epoxy resin composite material thereof and preparation method thereof

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Application publication date: 20131127