CN106833541A - A kind of modified graphene phase-change microcapsule and preparation method thereof - Google Patents
A kind of modified graphene phase-change microcapsule and preparation method thereof Download PDFInfo
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- CN106833541A CN106833541A CN201710094514.1A CN201710094514A CN106833541A CN 106833541 A CN106833541 A CN 106833541A CN 201710094514 A CN201710094514 A CN 201710094514A CN 106833541 A CN106833541 A CN 106833541A
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Abstract
The present invention discloses a kind of modified graphene phase-change microcapsule and preparation method thereof, the phase-change microcapsule is regular spherical, with core shell structure, described core shell structure is made up of the emulsifying agent of wall material and core and connection wall material and core, wherein wall material is modified graphene, core is that the mass ratio between phase-change material, and emulsifying agent, modified graphene and phase-change material three is (0.1~1.0):(0.01~0.5):10.Using ethylenediamine redox graphene, modified graphene is obtained, emulsifying agent, modified graphene and phase-change material are mixed, modified graphene coating phase-change materials microcapsules are obtained by sonochemical method.The phase-change microcapsule preparation method is simple, short preparation period, and gained microcapsules pattern is regular spherical, and wall material consumption is few, heat conductivility is strong.
Description
Technical field
The present invention relates to a kind of modified graphene phase-change microcapsule and preparation method thereof, belong to phase-change material micro-capsule neck
Domain.
Technical background
The rapid growth of global economy causes that the mankind increasingly increase to the demand of the energy, and the exhaustion of fossil energy can not keep away
Exempt from.Therefore, the dependence to fossil fuel is reduced, energy utilization rate is improved, development environment friendly material is that current mankind faces
Important topic.
Phase-changing energy storage material can absorb during phase transformation because of it or discharge substantial amounts of heat, can play temperature control and storage
The effect of energy, can solve the problem that energy supply and demand distribute unbalanced contradiction over time and space, be to improve having for energy utilization rate
Effect means.Although phase-change material has broad application prospects, the meeting in heating and cooling procedure of most of phase-change materials
There is the problems such as Volume Changes, rotten candle property, easy leakage and limit its application, the key for solving the problem is exactly that phase-change material is entered
Row encapsulation.Wherein, microcapsules technology is a kind of encapsulation technology being most widely used, microcapsules technology
(Microencapsulation Technology) is that one kind filmogen is overmolding to solid or liquid with core shell structure
The method of particulate.This core shell structure particulate can absorb in small temperature range or discharge considerable latent heat of phase change, with relatively aobvious
The heat-accumulation temperature-adjustment function of work.Microcapsules technology overcomes the application limitation of phase change material, and improve phase-change material uses effect
Rate, has widened the application field of phase-change material.At present, it is widely used to the fields such as medicine, chemical industry and agricultural.
Graphene is a kind of new material of two-dimensional nanostructure, and its thickness is only 0.335nm, Graphene almost Perfect
Structure causes that it has the performances such as numerous peculiar electricity, calorifics, mechanics；Thermal conductivity factor (5000W/ (m.K)) higher is caused
It is widely used in strengthen phase-change microcapsule heat conductivility, by the use of modified graphene as the shell of phase-change microcapsule, with
The thermal conductivity factor of phase-change microcapsule is substantially increased in the case that amount is little, for energy saving provides new direction.
The content of the invention
Technical problem：It is an object of the invention to provide a kind of modified graphene phase-change microcapsule and preparation method thereof, the phase
Become the wall material that modified graphene is directly used as microcapsules microcapsules as enhanced thermal conduction material, both solve core addition heat conduction
Reinforcing material causes the problem that enthalpy of phase change is reduced, and leakage problem of the phase-change material in application process is solved again, and this is modified
The preparation method of Graphene phase-change microcapsule is simple, and reaction condition is gentle.
Technical scheme：The invention provides a kind of modified graphene phase-change microcapsule, the phase-change microcapsule is regular spherical,
With core shell structure, described core shell structure is made up of the emulsifying agent of wall material and core and connection wall material and core, its mesospore
Material is modified graphene, and core is that the mass ratio between phase-change material, and emulsifying agent, modified graphene and phase-change material three is
(0.1~1.0):(0.01~0.5):10.
Wherein：
Described modified graphene has the Graphene of amido for surface grafting, and the modified graphene passes through ethylenediamine oxygen reduction
Graphite alkene is obtained.
Described phase-change material is paraffin, aliphatic acid, tetradecyl alchohol, hexadecanol or polyethylene glycol.
Present invention also offers a kind of preparation method of modified graphene phase-change microcapsule, the method is comprised the following steps：
1) emulsifying agent is dissolved in deionized water, phase-change material is added after stirring, ultrasound obtains emulsion；；
2) modified graphene is dissolved in deionized water, regulation PH is 1~4, and ultrasound obtains modified graphene solution；
3) by step 2) the modified graphene solution that obtains adds step 1) in the emulsion that obtains, ultrasonic disperse is changed
Property Graphene phase-change microcapsule preparation；
4) by step 3) the modified graphene phase-change microcapsule preparation that obtains cools down, washs, is dried to obtain modified graphene
Phase-change microcapsule.
Wherein：
The mass ratio of described emulsifying agent, modified graphene and phase-change material is (0.1~1.0)：(0.01~0.5):10.
Described emulsifying agent be dodecyl sodium sulfate, sulphosuccinates, fatty alcohol sulfate monoethanolamine salt or
Alkyl alcohol ethoxylates.
Step 1) ultrasound condition at 55~60 DEG C, 100~150W ultrasounds, 2~3h.
Step 2) it is described ultrasound condition be 100~150W ultrasounds, 10~60min, the reagent of described regulation PH is salt
Acid, concentration is 0.1mol/L~0.0001mol/L.
Step 3) described in ultrasonic disperse to obtain condition be 100~150W ultrasounds duration 10~60min.
Step 4) described in washing for absolute ethyl alcohol, deionized water alternately clean each three times, the drying be 50~70 DEG C
Lower drying 24~48 hours.
Beneficial effect：Compared with prior art, the present invention has advantages below：
1st, the wall material of phase-change microcapsule common at present is generally organic high molecular polymer, such as poly-methyl methacrylate
Ester, polyethylene, polystyrene, polyureas, polyamide, epoxy resin, Lauxite, melamine formaldehyde resin etc., organic high score
Sub- polymer wall material generally existing heat conductivility is poor, poor compatibility problem, and influence phase-change material heat in actual applications is rung
Answer speed and its with other materials compatibility；Generally solution is that thermal conductivity factor gold higher is added in the core to microcapsules
Category oxide or carbon material filler, but these materials can be deposited on the bottom of capsule after adding, cause being heated for material
It is uneven, and cause core enthalpy of phase change to reduce, it is impossible to fully demonstrate the latent heat performance of phase-change microcapsule；The present invention is not in core
Any thermal conductivity factor material higher is added, but core is solved as wall material with thermal conductivity factor modified graphene higher
Addition enhanced thermal conduction material causes the problem that enthalpy of phase change is reduced, while Graphene is modified, its surface grafting amido, in highly acid
Under the conditions of can protonate, surface is combined preferably from positively charged with phase-change material surface negative charge, and microcapsules pattern is obtained
It is regular, both solved the problems, such as that organic high molecular polymer wall material thermal conductivity factor was low, it also avoid its leakage in use and ask
Topic, while the consumption of Graphene is less in preparation process, save resources.
2nd, this method prepares modified graphene phase-change microcapsule using sonochemical method so that Microcapsules Size is distributed more
Uniformly, encystation rate is high, and wall material consumption is few, and heat conductivility is strong.
Brief description of the drawings
Fig. 1 is obtained modified graphene phase-change microcapsule optical microscope photograph for embodiment 1；
Fig. 2 is obtained modified graphene phase-change microcapsule stereoscan photograph for embodiment 1.
Specific embodiment
With reference to embodiment and Figure of description, the present invention is further illustrated：
Embodiment 1
Step 1, by 0.1g dodecyl sodium sulfates (SDBS) addition 150ml deionized waters, it is water-soluble that stirring is obtained SDBS
Liquid；
Step 2, will 10g paraffin waxs melt after be added in step 1 in the aqueous solution, under the conditions of 55 DEG C, 150W ultrasounds 2 are small
When, obtain Paraffin Emulsion；
Step 3,0.01g modified graphenes are distributed in 150ml deionized waters, and it is 0.1mol/L's that concentration is added afterwards
Hydrochloric acid conditioning solution PH is 1, and 100W ultrasounds 10min, obtains modified graphene solution afterwards；
Step 4, in the Paraffin Emulsion of modified graphene solution addition step 2 gained of step 3 gained, 100W ultrasounds
10min, ultrasound cause wall material combined by the electrostatic force between electric charge with core obtain modified graphene wrap up phase transformation it is micro-
Capsule preparations；
Step 5, the phase-change microcapsule preparation cooling that modified graphene is wrapped up, is handed over absolute ethyl alcohol, deionized water afterwards
Each three times for cleaning, drying obtains phase-change microcapsule in 24 hours at 50 DEG C.
Embodiment 2
Step 1, by 0.5g sulphosuccinates addition 150ml deionized waters, stirring is obtained sulphosuccinates
The aqueous solution；
Step 2, will 10g tetradecyl alchohols melt after be added in step 1 in the aqueous solution, under the conditions of 58 DEG C, 120W ultrasounds 2.5 are small
When, obtain tetradecyl alchohol emulsion；
Step 3,0.1g modified graphenes are distributed in 150ml deionized waters, and it is the hydrochloric acid of 0.01mol/L to add concentration
Regulation solution PH is 2, and 120W ultrasounds 30min, obtains modified graphene solution afterwards；
Step 4, in the tetradecyl alchohol emulsion of modified graphene solution addition step 2 gained of step 3 gained, 120W ultrasounds
30min, ultrasound cause wall material combined by the electrostatic force between electric charge with core obtain modified graphene wrap up phase transformation it is micro-
Capsule preparations；
Step 5, the phase-change microcapsule preparation cooling that modified graphene is wrapped up, is handed over absolute ethyl alcohol, deionized water afterwards
Each three times for cleaning, drying obtains phase-change microcapsule in 30 hours at 55 DEG C
Embodiment 3
Step 1, by 0.8g fatty alcohol sulfates monoethanolamine salt addition 150ml deionized waters, stirring is obtained fatty alcohol
Sulfuric ester MEA saline solution；
Step 2, will 10g hexadecanols melt after be added in step 1 in the aqueous solution, under the conditions of 58 DEG C, 130W ultrasounds 2.5 are small
When, obtain hexadecanol emulsion；
Step 3,0.2g modified graphenes are distributed in 150ml deionized waters, and it is the salt of 0.001mol/L to add concentration
Acid solution PH is 3, and 130W ultrasounds 40min, obtains modified graphene solution afterwards；
Step 4, in the hexadecanol emulsion of modified graphene solution addition step 2 gained of step 3 gained, 130W ultrasounds
40min, ultrasound cause wall material combined by the electrostatic force between electric charge with core obtain modified graphene wrap up phase transformation it is micro-
Capsule preparations；
Step 5, the phase-change microcapsule preparation cooling that modified graphene is wrapped up, is handed over absolute ethyl alcohol, deionized water afterwards
Each three times for cleaning, drying obtains phase-change microcapsule in 36 hours at 60 DEG C.
Embodiment 4
Step 1, by 1.0g alkyl alcohol ethoxylates addition 150ml deionized waters, stirring is obtained alkylol polyoxy second
The alkene ether aqueous solution；
Step 2, will 10g polyethylene glycol melt after be added in step 1 in the aqueous solution, under the conditions of 60 DEG C, 100W ultrasounds 3 are small
When, obtain polyethylene glycol emulsion；
Step 3,0.5g modified graphenes are distributed in 150ml deionized waters, and it is the salt of 0.0001mol/L to add concentration
Acid solution regulation PH is 4, and 150W ultrasounds 60min, obtains modified graphene solution afterwards；
Step 4, in the polyethylene glycol emulsion of modified graphene solution addition step 2 gained of step 3 gained, 150W ultrasounds
60min, ultrasound cause wall material combined by the electrostatic force between electric charge with core obtain modified graphene wrap up phase transformation it is micro-
Capsule preparations；
Step 5, the phase-change microcapsule preparation cooling that modified graphene is wrapped up, is handed over absolute ethyl alcohol, deionized water afterwards
Each three times for cleaning, drying obtains phase-change microcapsule in 48 hours at 70 DEG C.
Above-described embodiment is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill of the art
For personnel, under the premise without departing from the principles of the invention, some improvement and equivalent can also be made, these are to the present invention
Claim be improved with the technical scheme after equivalent, each fall within protection scope of the present invention.
Claims (10)
1. a kind of modified graphene phase-change microcapsule, it is characterised in that：The phase-change microcapsule is regular spherical, with nucleocapsid knot
Structure, described core shell structure is made up of the emulsifying agent of wall material and core and connection wall material and core, and wherein wall material is modified stone
Black alkene, core be mass ratio between phase-change material, and emulsifying agent, modified graphene and phase-change material three for (0.1~
1.0):(0.01~0.5):10.
2. a kind of modified graphene phase-change microcapsule as claimed in claim 1, it is characterised in that：Described modified graphene is
Surface grafting has the Graphene of amido, and the modified graphene is obtained by ethylenediamine redox graphene.
3. a kind of modified graphene phase-change microcapsule as claimed in claim 1, it is characterised in that：Described phase-change material is stone
Wax, aliphatic acid, tetradecyl alchohol, hexadecanol or polyethylene glycol.
4. a kind of preparation method of modified graphene phase-change microcapsule as claimed in claim 1, it is characterised in that：The method bag
Include following steps：
1) emulsifying agent is dissolved in deionized water, phase-change material is added after stirring, ultrasound obtains emulsion；
2) modified graphene is dissolved in deionized water, regulation PH is 1~4, and ultrasound obtains modified graphene solution；
3) by step 2) the modified graphene solution that obtains adds step 1) in the emulsion that obtains, ultrasonic disperse obtains modified stone
Black alkene phase-change microcapsule preparation；
4) by step 3) the modified graphene phase-change microcapsule preparation that obtains cools down, washs, being dried to obtain modified graphene phase transformation
Microcapsules.
5. a kind of preparation method of modified graphene phase-change microcapsule as claimed in claim 4, it is characterised in that：Described breast
The mass ratio of agent, modified graphene and phase-change material is (0.1~1.0)：(0.01~0.5):10.
6. a kind of preparation method of modified graphene phase-change microcapsule as claimed in claim 4, it is characterised in that：Described breast
Agent is dodecyl sodium sulfate, sulphosuccinates, fatty alcohol sulfate monoethanolamine salt or alkyl alcohol ethoxylates.
7. a kind of preparation method of modified graphene phase-change microcapsule as claimed in claim 4, it is characterised in that：Step 1) institute
The condition of ultrasound is stated at 55~60 DEG C, 100~150W ultrasounds, 2~3h.
8. a kind of preparation method of modified graphene phase-change microcapsule as claimed in claim 4, it is characterised in that：Step 2) institute
The condition of ultrasound is stated for 100~150W ultrasounds, 10~60min, the reagent of described regulation PH is hydrochloric acid, and concentration is 0.1mol/
L~0.0001mol/L.
9. a kind of preparation method of modified graphene phase-change microcapsule as claimed in claim 4, it is characterised in that：Step 3) institute
The ultrasonic disperse stated obtains condition for 100~150W ultrasounds, 10~60min.
10. a kind of preparation method of modified graphene phase-change microcapsule as claimed in claim 4, it is characterised in that：Step 4)
Described washing is absolute ethyl alcohol, deionized water is alternately cleaned each three times, and the drying is small to dry 24~48 at 50~70 DEG C
When.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107699205A (en) * | 2017-11-10 | 2018-02-16 | 中国科学院山西煤炭化学研究所 | The preparation method of the composite phase-change material of modified graphene oxide cladding |
| CN108084718A (en) * | 2017-12-11 | 2018-05-29 | 山西省交通科学研究院 | A kind of biology base phase-changing and temperature-regulating modified pitch and preparation method thereof |
| CN108192467A (en) * | 2018-01-02 | 2018-06-22 | 邹元月 | A kind of phase-change thermal storage coating and preparation method and application |
| CN108977910A (en) * | 2018-07-18 | 2018-12-11 | 杭州高烯科技有限公司 | A kind of phase change microsphere, multi-functional phase-changing and temperature-regulating fiber and preparation method thereof |
| CN109050827A (en) * | 2018-07-31 | 2018-12-21 | 深圳森阳环保材料科技有限公司 | A kind of heat insulating life saving clothing for use with positioning function |
| CN109234825A (en) * | 2018-07-18 | 2019-01-18 | 杭州高烯科技有限公司 | A kind of phase change microsphere, intelligent temperature adjusting fiber and preparation method thereof |
| CN109758990A (en) * | 2019-03-19 | 2019-05-17 | 北京服装学院 | Preparation method and application with highly sensitive temperature induced color changing microcapsules |
| CN110252220A (en) * | 2019-06-20 | 2019-09-20 | 延安大学 | The preparation method of temperature controllable damping microcapsules based on graphene oxide |
| CN109010014B (en) * | 2018-08-08 | 2020-09-22 | 武汉中投汉嘉科技有限公司 | Ear acupoint pressing pill and its preparing method |
| CN111849424A (en) * | 2020-08-05 | 2020-10-30 | 哈尔滨工业大学 | Phase-change heat storage material with microsphere structure and preparation method thereof |
| CN113698771A (en) * | 2021-09-02 | 2021-11-26 | 应急管理部四川消防研究所 | Self-temperature-adaptive flame-retardant organic silicon foam sealing gasket and preparation method thereof |
| CN114316920A (en) * | 2021-12-29 | 2022-04-12 | 中铁大桥局集团有限公司 | High-thermal-conductivity phase-change microcapsule and preparation method and application thereof |
| CN114316919A (en) * | 2021-12-25 | 2022-04-12 | 福建师范大学 | Polymer/graphene oxide composite microcapsule for packaging phase change energy storage material and preparation method thereof |
| CN115849861A (en) * | 2022-11-22 | 2023-03-28 | 安徽宇航派蒙健康科技股份有限公司 | Composite graphene heat-conducting film and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107699205A (en) * | 2017-11-10 | 2018-02-16 | 中国科学院山西煤炭化学研究所 | The preparation method of the composite phase-change material of modified graphene oxide cladding |
| CN108084718A (en) * | 2017-12-11 | 2018-05-29 | 山西省交通科学研究院 | A kind of biology base phase-changing and temperature-regulating modified pitch and preparation method thereof |
| CN108192467A (en) * | 2018-01-02 | 2018-06-22 | 邹元月 | A kind of phase-change thermal storage coating and preparation method and application |
| CN108977910A (en) * | 2018-07-18 | 2018-12-11 | 杭州高烯科技有限公司 | A kind of phase change microsphere, multi-functional phase-changing and temperature-regulating fiber and preparation method thereof |
| CN109234825A (en) * | 2018-07-18 | 2019-01-18 | 杭州高烯科技有限公司 | A kind of phase change microsphere, intelligent temperature adjusting fiber and preparation method thereof |
| CN109050827A (en) * | 2018-07-31 | 2018-12-21 | 深圳森阳环保材料科技有限公司 | A kind of heat insulating life saving clothing for use with positioning function |
| CN109010014B (en) * | 2018-08-08 | 2020-09-22 | 武汉中投汉嘉科技有限公司 | Ear acupoint pressing pill and its preparing method |
| CN109758990A (en) * | 2019-03-19 | 2019-05-17 | 北京服装学院 | Preparation method and application with highly sensitive temperature induced color changing microcapsules |
| CN110252220A (en) * | 2019-06-20 | 2019-09-20 | 延安大学 | The preparation method of temperature controllable damping microcapsules based on graphene oxide |
| CN111849424A (en) * | 2020-08-05 | 2020-10-30 | 哈尔滨工业大学 | Phase-change heat storage material with microsphere structure and preparation method thereof |
| CN113698771A (en) * | 2021-09-02 | 2021-11-26 | 应急管理部四川消防研究所 | Self-temperature-adaptive flame-retardant organic silicon foam sealing gasket and preparation method thereof |
| CN114316919A (en) * | 2021-12-25 | 2022-04-12 | 福建师范大学 | Polymer/graphene oxide composite microcapsule for packaging phase change energy storage material and preparation method thereof |
| CN114316920A (en) * | 2021-12-29 | 2022-04-12 | 中铁大桥局集团有限公司 | High-thermal-conductivity phase-change microcapsule and preparation method and application thereof |
| CN115849861A (en) * | 2022-11-22 | 2023-03-28 | 安徽宇航派蒙健康科技股份有限公司 | Composite graphene heat-conducting film and preparation method thereof |
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