CN106590542A - Heat-conducting reinforced graphene phase change material - Google Patents
Heat-conducting reinforced graphene phase change material Download PDFInfo
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Abstract
The invention relates to a phase change material, in particular to a heat-conducting reinforced graphene phase change material. The heat-conducting reinforced graphene phase change material is prepared from components in percentage by weight as follows: 50%-60% of CA (capric acid), 40%-50% of LA (lauryl alcohol) and 0.1%-12% of CTAB-RGO (cetyl trimethyl ammonium bromide-reduced graphene oxide). According to the material, graphene is subjected to functional modification with a surfactant, and dispersion in media (fatty acid and alcohol solid-liquid phase change materials) is improved, so that the problems about the uniformity and stability of the heat-conducting reinforced graphene phase change material are effectively solved.
Description
Technical field
The present invention relates to a kind of phase-changing energy storage material, more particularly to a kind of Graphene enhanced thermal conduction phase-changing energy storage material.
Background technology
Phase-change accumulation energy is to carry out the storage and release of Energy Efficient using the physics phase in version of material to improve energy profit
With efficiency, and then the purpose of energy-conservation is realized, played an important role in the reasonable disposition of the energy.For the material of phase-change accumulation energy
Mainly there are inorganic, organic and composite three major types.There is certain defect in mineral-type, with organic phase-changing energy storage material in reality
There are problems that various in the application of border, and composite phase-change energy storage material overcomes the deficiency of one-component phase-change material, with energy storage
Density is high, utilizing status are good, it is applied widely the features such as.Generally the high microgranule of some heat conductivitys is added using doping method
To in phase-change material, the good enhanced thermal conduction type composite phase change energy-storing material of high phase transformation enthalpy, excellent thermal conductivity, fixed effect is obtained
Material, it has also become one of focus of current phase-change accumulation energy research field.
In recent years, Chinese scholars prepare enhanced thermal conduction type phase using the method by ultrasound or addition surfactant
Change energy-storage material.For example, Nanometer Copper (Cu) is distributed to melted paraffin by Wu etc. by ultrasound and the assosting effect of surfactant
In be prepared for Cu/ paraffin nano-fluid phase-changing energy storage materials, the addition of 1wt% nanometers Cu makes the rate of temperature fall of phase-change material obvious
Accelerate, temperature fall time shortens 28%.Multi-walled carbon nano-tubes (MWNTs) is mixed and prepare in hexadecylic acid (PA) PA/ by Wang J etc.
MWNTs composite phase-change energy storage materials.Addition is 0.33W/ (m for the PA/MWNTS composite phase-change materials heat conductivity of 1wt%
K), compare pure PA enhanced thermal conductions rate and be up to 30%.Further, Wang W etc. are by β-aluminium nitride (β-AlN) powder, dihydroxylic alcohols
And SiO (PEG1000)2Colloidal sol is mixed, and is prepared with composite phase-change energy storage material.Result of study shows, as β-AlN
Amount when 5% increases to 30%, the heat conductivity of composite increased nearly 1 times.Although can have by doping preparation method
Effect improves the heat conductivity of composite phase-change material, but the nanoparticle of enhanced thermal conduction due to specific surface area, surface energy it is big, easily send out
It is raw to reunite and settle, cause preparation material there are problems that lack of homogeneity,.Therefore, dispersed, property is developed
The excellent enhanced thermal conduction type composite phase-change energy storage material of energy has important practical significance for raising energy utilization rate.
Graphene is a kind of tightly packed carbonaceous new material into monolayer bi-dimensional cellular shape lattice structure of carbon atom, with height
The heat conductivity of the characteristics such as thermal conductivity, high intensity, high conductivity and high-specific surface area, wherein single-layer graphene is up to 5300W/
(mK) heat conductivility of phase-changing energy storage material can be improved as enhanced thermal conduction agent.Composite phase change energy-storing is prepared by direct doping
During material, because graphene sheet layer has big specific surface area and high surface energy, often there are problems that dispersion is uneven.
The content of the invention
It is an object of the invention to provide a kind of Graphene enhanced thermal conduction phase-changing energy storage material, the material surfactant
Functional modification is carried out to Graphene, the dispersibility in medium (fatty acid and alcohols solid-liquid phase change material) is improved, so as to have
Effect solves uniformity, the stability problem of enhanced thermal conduction type composite phase-change energy storage material.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of Graphene enhanced thermal conduction phase-changing energy storage material, the material includes the component of following weight fraction meter：50-60%
Capric acid (CA), 40-50% lauryl alcohols (LA), and be the functionalization graphene in terms of 100% by the gross weight of capric acid and lauryl alcohol
(CTAB-RGO) 0.1-12%.
Preferably, the preparation method of the functionalization graphene is：With graphite as raw material, by improving Hummers methods
Prepared graphite oxide (GO), GO and CTAB carries out the prepared graphene oxide (CTAB-GO) that organises of reaction that organises, then by water
Close hydrazine reduction reaction and functionalization graphene (CTAB-RGO) is obtained.
Preferably, the preparation method of the functionalization graphene is specifically：GO ultrasonic disperses are added in deionized water,
The aqueous solution of Deca CTAB, the mass ratio for making GO and CTAB is 1:10-12, then makes system be warming up to 90 ± 2 DEG C, and stirring is anti-
Should, subsequently while Deca hydrazine hydrate and ammonia, GO is 1 with the mass ratio of hydrazine hydrate:0.7-0.9, the mass concentration of ammonia is 25-
30%, the addition of ammonia is 3-4 times of GO mass, and 90 DEG C ± 2 reaction 2-3h, reaction filters to obtain black solid powder after terminating
End, is obtained CTAB-RGO after washing and drying.The mass concentration of hydrazine hydrate is 80%
Preferably, the material includes the component of following weight fraction meter：50-60% capric acid (CA), 40-50% lauryl alcohols
(LA) it is, and by the gross weight of capric acid and lauryl alcohol functionalization graphene (CTAB-RGO) 0.3-1.5% in terms of 100%.
Preferably, the material includes the component of following weight fraction meter：50-60% capric acid (CA), 40-50% lauryl alcohols
(LA) it is, and by the gross weight of capric acid and lauryl alcohol functionalization graphene (CTAB-RGO) 2-10% in terms of 100%.
A kind of preparation method of Graphene enhanced thermal conduction phase-changing energy storage material, the mixture that capric acid and lauryl alcohol are constituted is existed
Mixture being warming up under ultrasound and stirring to be completely melt, adding functionalization graphene (CTAB-RGO), ultrasound simultaneously stirs mixing,
After naturally cooling to room temperature, powdery is milled to, CTAB-RGO/CA-LA composites are obtained, as described Graphene heat conduction increases
Strong phase-changing energy storage material.
Preferably, stirring incorporation time is 4-6 hours.
Preferably, the stir speed (S.S.) of stirring mixing is 200-500 rev/min, ultrasound intensity 400-500Wcm-2, ultrasound
Frequency is 4kHz.
The invention has the beneficial effects as follows：The present invention with graphene oxide (GO) as raw material, N, N, N- trimethyl -1- hexadecanes
Base ammonium bromide (CTAB) is modifying agent, and Jing organic modifications, reduction reaction are obtained functionalization graphene (CTAB-RGO).Infrared light
Spectrum (FT-IR), X-ray diffractometer (XRD), scanning electron microscope (SEM) and thermal gravimetric analyzer (TGA) test result show CTAB
Graphenic surface is grafted to, percent grafting is 9.2%.Heat conduction is carried out to capric acid-lauryl alcohol (CA-LA) blend using CTAB-RGO
Enhancing modified, the addition for as a result showing CTAB-RGO improves latent heat of phase change, heat conductivity, the heat of CA-LA phase change composite materials
Stability etc..The latent heat of phase change of addition 1%CTAB-RGO composites is 164.7J/g, is improved with respect to CA-LA mixing materials
22%；Heat conductivity is up to 0.94W/ (mK), and enhanced thermal conduction rate is 184%.
The general performance study to Graphene enhanced thermal conduction phase-changing energy storage material of the present invention, is high-performance phase transformation storage of new generation
The exploitation of energy material provides important foundation with application.
Description of the drawings
Fig. 1 is that CTAB-RGO of the present invention prepares schematic diagram；
Fig. 2 is the FT-IR collection of illustrative plates of GO, CTAB-GO and CTAB-RGO；
Fig. 3 is the TGA curve charts of GO, RGO and CTAB-RGO；
Fig. 4 is the XRD spectrum of graphite, GO, CTAB-GO and CTAB-RGO；
Fig. 5 is that the SEM of GO (a) and CTAB-RGO (b) schemes, and the TEM of GO (c) and CTAB-RGO (d) schemes；
Fig. 6 is the GO and CTAB-GO dispersibility observation in water and toluene：A () GO and (b) CTAB-RGO are dispersed in water,
C () GO and (d) CTAB-RGO are dispersed in toluene；
Fig. 7 is the DSC curve figure of CTAB-RGO/CA-LA composites；
Fig. 8 is the TGA curve charts of CTAB-RGO/CA-LA composites；
Fig. 9 is impact of the CTAB-RGO contents to thermal conductivity of composite materials.
Specific embodiment
Below by specific embodiment, technical scheme is described in further detail.It should be appreciated that this
Bright enforcement is not limited to the following examples, and any pro forma flexible and/or change made to the present invention all will fall
Enter the scope of the present invention.
In the present invention, if not refering in particular to, all of part, percentage ratio are unit of weight, the equipment for being adopted and raw material etc.
It is commercially available or commonly used in the art.Method in following embodiments, if no special instructions, is the normal of this area
Rule method.
Capric acid (CA), lauryl alcohol (LA), chemical pure, Chemical Reagent Co., Ltd., Sinopharm Group；
Graphite, product type F-1, particle diameter is about 4 μm, Qingdao Bai Chuan graphite company limited；
N, N, N- trimethyl -1- cetyl ammonium bromide (CTAB), purity 99%, Shanghai Aladdin biochemical technology share has
Limit company.
Embodiment：
First, the preparation of functionalization graphene (CTAB-RGO)
With graphite as raw material, graphite oxide (GO) is obtained by improving Hummers legal systems, GO and CTAB carries out the reaction that organises
The graphene oxide (CTAB-GO) that organises is obtained, then functionalization graphene (CTAB-RGO) is obtained by hydrazine hydrate reduction reaction.
1.0g GO ultrasonic disperses are added in 100mL deionized waters 1 hour, Deca concentration is the aqueous solution 11mL of 1.0%CTAB, rises
Temperature to 90 DEG C, react 4 hours by high-speed stirred.Subsequently while Deca 0.8mL hydrazine hydrate (mass concentration 80%) and 3.5mL ammonia
(concentration is 28%), 90 DEG C of reaction 2h, reaction filters to obtain black solid powder after terminating, with methanol and deionized water cyclic washing
Three times, CTAB-RGO is obtained after 24 hours in 80 DEG C of drying in oven, its preparation process is as shown in Figure 1.
2nd, the preparation of Graphene enhanced thermal conduction phase-changing energy storage material
The mixture that 55g capric acid (CA), 45g lauryl alcohols (LA) are constituted is placed in the heater with ultrasound and agitating device
In, 40 DEG C are warmed up to being completely melt, then by different quality than adding a certain amount of functionalization graphene (CTAB-RGO), ultrasound is simultaneously
Stirring mixing 4 hours, wherein stir speed (S.S.) are 200 revs/min, ultrasound intensity 400Wcm-2, supersonic frequency is 4kHz, naturally cold
But to room temperature, powdery is milled to agate mortar, CTAB-RGO/CA-LA composites is obtained, put sealing preserve in exsiccator
It is stand-by.
3rd, characterize and test
Fourier infrared spectrum (FT-IR) is tested：By GO, CTAB-RGO etc. and KBr mixed pressuring plates, using U.S. Thermo
The type Fourier infrared spectrographs of Nicolet 5700 test of Electron companies, sweep limitss 4000-400cm-1, resolution：
1cm-1.X-ray diffractometer (XRD) is tested：With the X'Pert Pro type X-ray diffractometers of Dutch PANalytical B.V. companies
Graphite, the interlamellar spacing of GO, CTAB-GO and CTAB-RGO are determined, Cu-K alpha rays are excitaton source used in measurement, using Ni as filter
Color chips, tube voltage 40kV, tube current 150mA, 2 °/min of scanning speed, step-length is 0.03.Scanning electron microscope (SEM) is tested：Using
Hitachi S-4800 (II) the type transmitting scanning electron microscope of Japanese Hitachi companies observes the pattern of sample.Transmission electricity
Mirror (TEM) is tested：Take a small amount of GO and CTAB-RGO to disperse in ethanol, to vibrate 30 minutes in ultra sonic bath, dipped with copper mesh micro-
Amount suspension, after solvent volatilization, with its pattern of the JEM1230 types transmission electron microscope observing of Japanese JEOL companies, electronics accelerates electricity
Press as 80kV.Differential scanning calorimeter (DSC) is tested：30～50mg of testing sample is taken, under nitrogen atmosphere, using Germany
The DSC 200F3 differential scanning calorimeters of netzsch companies, programming rate is 10 DEG C/min, and temperature range is 30 DEG C -400 DEG C,
Dsc analysis are carried out to sample.Thermal gravimetric analyzer (TGA) is tested：Instrument is the Q600SDT type thermogravimetic analysis (TGA)s of TA companies of the U.S.
Instrument, test condition is nitrogen atmosphere, and programming rate is 10 DEG C/min, and temperature range is 30～600 DEG C.Measured Results of Thermal Conductivity：Adopt
With transient two hot-wires method, using the DRE-2A heat conduction coefficient testers of Xiangtan City instrument and meter company limited Graphene heat conduction is measured
Strengthen the heat conductivity of phase-changing energy storage material.
The structural characterization of 1.CTAB-RGO
Fig. 2 is the infrared spectrogram of GO, CTAB-GO and CTAB-RGO.As can be known from Fig. 2, in GO infrared spectrograms
3500cm-1、1728cm-1、1614cm-1And 1115cm-1The absworption peak at place is respectively belonging to-OH, C=O, C-OH and C-O-C etc. and shakes
Dynamic peak, shows in GO containing functional groups such as-OH ,-COOH, C-O-C ,-C=O.Compare with GO spectrograms, in CTAB-GO spectrograms
2980cm-1、2842cm-1And 1486cm-1Place has C-H flexible and flexural vibrations peak, shows that CTAB is grafted to GO by chemical modification
Surface.Compare CTAB-GO, 1115cm in CTAB-RGO spectrograms-1The absworption peak of place C-O-C substantially weakens, and shows GO epoxide groups
By hydrazine hydrate reduction.
In a nitrogen atmosphere, the TGA curve charts of GO, RGO and CTAB-RGO are as shown in Figure 3.The thermal decomposition of GO mainly occurs
In the range of 200 DEG C～260 DEG C, 600 DEG C of carbon yields are about 42wt%, and this is that the oxygen groups being rich in due to GO surfaces thermally decompose institute
Cause.GO (RGO) heat stability is significantly improved after reduction, and 600 DEG C of carbon yields are up to 90wt%.In the range of 260 DEG C～340 DEG C,
The long alkane cation for being grafted on CTAB-RGO surfaces is thermally decomposed, and weight-loss ratio is about 9.2wt%, and this is designed with experiment
The 10wt% percent graftings of CTAB-RGO coincide substantially.
Fig. 4 is graphite, the XRD spectrum of GO, CTAB-GO and CTAB-RGO.In GO collection of illustrative plates at θ=10.0 ° of 001 angle of diffraction 2
Diffraction maximum correspondence GO interlamellar spacings are 0.90nm, and more than graphite flake layer spacing 0.33nm, this is because oxidation reaction destroys graphite
Lamella original structure, causes its interlamellar spacing increase.From the XRD spectrum of CTAB-GO, diffraction maximum correspondence at 2 θ=8.3 °
CTAB-GO interlamellar spacings are 1.06nm, and interlamellar spacing increase shows that CTAB cationic moieties are inserted into GO interlayers, causes GO sheet interlayer spacings
Increase.Only in 2 θ it is have a relatively wide and little diffraction maximum at 25.3 ° on CTAB-RGO collection of illustrative plates, shows GO Jing hydrazine hydrates also
Original stacked structure is destroyed after original, and its lamella is in exfoliated state.
Fig. 5 a, b scheme for the SEM of GO and CTAB-RGO, and the GO of multiple structure is can be seen that in aggregate form from Fig. 5 a, b
Exist, because its surface has certain hydrophilic, untreated GO is difficult dispersion in organic media.Comparatively speaking, CTAB-
Because surface is connected to, long alkane cation makes it have certain lipophile to RGO, and the graphene sheet layer peeled off after reduction is not easy
Reunite, be conducive to it to disperse in organic media.Fig. 5 c, d scheme for the TEM of GO and CTAB-RGO.GO contains a large amount of folds and rises and falls
Laminated structure, curling GO lamellas be stacked (Fig. 5 c).Thin graphite is observed from TEM figures (Fig. 5 d) of CTAB-RGO
Alkene lamella is in good dispersity.
A small amount of GO and CTAB-GO are added separately in water and toluene (suspension concentration is 0.1mg/mL), ultrasound 15
Minute stands 12 hours, observes GO and CTAB-GO deployment conditions in water and toluene.As shown in fig. 6, GO surfaces contain it is substantial amounts of
The hydrophilic groups such as carboxyl, hydroxyl, therefore can be well dispersed in water, but dispersion is difficult in non-polar solven toluene, hang
Supernatant liquid quickly forms deposition.Comparatively speaking, due to surface organic, dispersibility is decreased obviously CTAB-GO in water, and suspension is quiet
Postponing bottom has a small amount of deposit, and has preferable dispersibility in toluene.For CA-LA mixture, polarity phase
To weaker, therefore CTAB-GO can form preferably dispersion in CA-LA mixture.
2.DSC is analyzed
The DSC curve figure of CTAB-RGO/CA-LA composites is as shown in fig. 7, each sample DSC and TGA analytical data are shown in Table
1。
The each sample DSC of table 1 and TGA analytical data
The phase transition temperature of CTAB-RGO/CA-LA composites defines phase in version process DSC curve in 5～38 DEG C of scopes
Peak value is fusing point, and impact of the relatively more different CTAB-RGO additions to the fusing point of Graphene enhanced thermal conduction phase-changing energy storage material.
Fig. 7 is the DSC curve figure of CTAB-RGO/CA-LA composites, and each sample DSC data analysis result is listed in table 1.Can be with from Fig. 7
Find out, with the increase of CTAB-RGO additions, the fusing point of CTAB-RGO/CA-LA composites is gradually increasing.Work as CTAB-RGO
When content reaches 1%, the fusing point of CTAB-RGO/CA-LA composites is 27.6 DEG C, and compared with CA-LA mixing materials, fusing point is carried
It is high 6.4 DEG C；Hereafter continue to increase CTAB-RGO contents, the fusing point rising of CTAB-RGO/CA-LA composites is not obvious.
This is the presence due to graphene film Rotating fields so that the pressure that CA-LA is undergone phase transition in microcellular structure in composite increases
Plus, thus composite phase transition temperature is slightly improved with respect to CA-LA mixing materials.Endothermic peak or exothermic peak in DSC curve
The area surrounded with baseline is latent heat of phase change, is the energy storage density of system in stored energy application.As known from Table 1, composite
Latent heat of phase change is improved as the content of CTAB-RGO increases, and is but gradually lowered after content is more than 1%.CTAB-RGO additions
Latent heat of phase change for 1% composite is up to 164.7J/g, and with respect to CA-LA mixing materials 22% is improve.This is attributable to
The functionalization effect of CTAB-RGO, improves dispersibility of the Graphene in CA-LA dielectric materials, enhances graphene sheet layer and is situated between
The interaction of material, so as to improve the latent heat of phase change of composite.
3. heat stability
Fig. 8 for CTAB-RGO/CA-LA composites thermal weight loss (TGA) curve chart, each sample TGA data results
It is listed in table 1.The thermal decomposition process of CTAB-RGO/CA-LA composites occurs mainly in 140 DEG C～240 DEG C temperature range (nitrogen
Atmosphere), the content of CTAB-RGO has impact to fused salt composite initial decomposition temperature.As it can be observed in the picture that composite
Initial decomposition temperature is improved with the increase of CTAB-RGO contents, when CTAB-RGO contents are that 1%, CTAB-RGO/CA-LA is multiple
The initial decomposition temperature of condensation material compares CA-LA mixing materials and improves about 5.2 DEG C；It is multiple when CTAB-RGO contents reach 10%
The initial decomposition temperature of condensation material improves about 12.4 DEG C.This increased and organic media due to the effect of organising of Graphene
The compatibility, improve CTAB-RGO dispersibility in media as well, be conducive to enhancing in CA-LA mixing material thermal decomposition processes
The iris action of graphene sheet layer, so as to improve the thermal stability of composite.
4. heat conductivility
Fig. 9 compares impact of the CTAB-RGO contents to thermal conductivity of composite materials.As can be seen from Figure 9, with CTAB-RGO
The increase of addition, thermal conductivity of composite materials gradually increases.Addition 1%CTAB-RGO composites heat conductivity be
0.94W/ (mK), enhanced thermal conduction rate is acted on up to 184% far above the CNT enhanced thermal conduction of document report.Addition 10%
The heat conductivity of CTAB-RGO composites is up to 1.42W/ (mK), and enhanced thermal conduction rate is 407%.Sheet function graphite
Alkene has big specific surface area and good heat conductivity, adds CTAB-RGO to improve phase-change accumulation energy in CA-LA mixing materials
Composite heat-conductive characteristic.It is single although the increase of CTAB-RGO additions is conducive to the raising of thermal conductivity of composite materials
Position quality CTAB-RGO has but declined to composite enhanced thermal conduction rate.This be due to CTAB-RGO additions improve, it is unfavorable
Dispersion in Graphene in organic media, so as to reduce the enhanced thermal conduction effect of CTAB-RGO.
Conclusion
The present invention carries out organic modification to GO using CTAB, then Jing reduction reactions are obtained functionalization graphene (CTAB-
RGO).CTAB-RGO structure Jing FT-IR, XRD, SEM and TEM are confirmed, and TGA results show that the percent grafting of CTAB-RGO is
9.2%.CTAB-RGO/CA-LA composites are prepared for using ultrasonic wave added blending method, the addition of CTAB-RGO improves CA-
Latent heat of phase change, heat conductivity, thermal stability of LA phase-changing energy storage materials etc..The phase transformation of addition 1%CTAB-RGO composites
Latent heat is 164.7J/g, and with respect to CA-LA mixing materials 22% is improve；Heat conductivity is up to 0.94W/ (mK), and heat conduction increases
Strong rate is 184%.
Embodiment described above is one kind preferably scheme of the present invention, not makees any pro forma to the present invention
Limit, also have other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (5)
1. a kind of Graphene enhanced thermal conduction phase-changing energy storage material, it is characterised in that the material includes the group of following weight fraction meter
Point：50-60% capric acid (CA), 40-50% lauryl alcohols (LA), and be the functionalization in terms of 100% by the gross weight of capric acid and lauryl alcohol
Graphene（CTAB-RGO）0.1-12%.
2. Graphene enhanced thermal conduction phase-changing energy storage material according to claim 1, it is characterised in that：The function graphite
The preparation method of alkene is：With graphite as raw material, by improving Hummers legal systems graphite oxide is obtained（GO）, GO had with CTAB
Machineization reaction is obtained the graphene oxide that organises（CTAB-GO）, then functionalization graphene is obtained by hydrazine hydrate reduction reaction
（CTAB-RGO）.
3. Graphene enhanced thermal conduction phase-changing energy storage material according to claim 2, it is characterised in that：The function graphite
The preparation method of alkene is specifically：GO ultrasonic disperses, the aqueous solution of Deca CTAB is added to make the matter of GO and CTAB in deionized water
Amount is than being 1:10-12, then makes system be warming up to 90 ± 2 DEG C, stirring reaction, subsequently Deca hydrazine hydrate and ammonia simultaneously, GO with
The mass ratio of hydrazine hydrate is 1:0.7-0.9, the mass concentration of ammonia is 25-30%, and the addition of ammonia is 3-4 times of GO mass,
90 DEG C ± 2 reaction 2-3h, reaction filters to obtain black solid powder after terminating, and CTAB-RGO is obtained after washing and drying, hydrazine hydrate
Mass concentration is generally 80 ± 5%.
4. Graphene enhanced thermal conduction phase-changing energy storage material according to claim 1, it is characterised in that：The material includes following
The component of weight fraction meter：50-60% capric acid (CA), 40-50% lauryl alcohols (LA), and be with the gross weight of capric acid and lauryl alcohol
The functionalization graphene of 100% meter（CTAB-RGO）0.3-1.5%.
5. Graphene enhanced thermal conduction phase-changing energy storage material according to claim 1, it is characterised in that：The material includes following
The component of weight fraction meter：50-60% capric acid (CA), 40-50% lauryl alcohols (LA), and be with the gross weight of capric acid and lauryl alcohol
The functionalization graphene of 100% meter（CTAB-RGO）2-10%.
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| 肖舒文: "石墨烯功能化及其PVB复合材料的制备", 《中国优秀硕士学位论文全文数据库 工程科技1辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108048046A (en) * | 2017-12-29 | 2018-05-18 | 北京国能电池科技有限公司 | Using foam copper as composite phase-change material of matrix and preparation method thereof and accumulation of heat bag |
| CN108048046B (en) * | 2017-12-29 | 2020-11-10 | 北京国能电池科技有限公司 | Composite phase-change material with foamy copper as matrix, preparation method thereof and heat storage bag |
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| CN106590542B (en) | 2020-02-21 |
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