CN106883826A - A kind of phase change composite material and preparation method thereof - Google Patents
A kind of phase change composite material and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of preparation method of phase change composite material, it is comprised the following steps：(1) mesoporous silicon oxide is provided, wherein the mesoporous silicon oxide includes multiple passages；(2) mesoporous silicon oxide is modified by dopamine, dopamine is invested in the passage of the mesoporous silicon oxide；(3) in the mesoporous silicon oxide being modified through dopamine impregnated in into polyglycol solution, make polyethylene glycol immobilized in the passage of mesoporous silicon oxide and as core, phase change composite material is obtained, wherein the amino and catechol functional group in the polyethylene glycol and dopamine form hydrogen bond and realizes being combined closely with the mesoporous silicon oxide.The invention further relates to a kind of phase change composite material.
Description
Technical field
The present invention relates to a kind of phase change composite material and preparation method thereof.
Background technology
Phase-change material (PCMs) because with energy storage density is big, output temperature and heat stabilization and transition temperature range it is wide etc. excellent
Point, is one of current most potential energy storage carrier.Phase-change material is widely used in building energy conservation, solar energy optical-thermal system
The fields such as system, industrial exhaust heat utilization, dissipation from electronic devices, air-conditioning system and phase-change temperature control commodity.
Polyethylene glycol (PEG) because with enthalpy of phase change is high, phase transition temperature is adjustable, it is nonhazardous, corrosion-resistant and biodegradable etc.
Advantage, is particularly suited for energy-storage materials of construction, is current most one of phase-change material of application prospect.
But PEG phase-change materials have that heat conductivility is poor and easy in application.It is load with mesoporous silicon oxide
Body synthesizes shaping phase-change material, is the effective way for solving the above problems.Existing result of study shows that mesoporous silicon oxide can be carried
The load capacity of PEG high, the shaping phase-change material of preparation has good mechanical strength, heat conductivility and heat endurance, and phase
Become enthalpy to be raised with the increase of PEG load capacity.But the silicone hydroxyl of meso-porous titanium dioxide silicon face is acted on the oxygen atom in PEG molecules
The hydrogen bond (H-O) of formation hinders the warm-up movement of PEG molecules, causes percent crystallization in massecuite reduction in its phase transition process, and enthalpy of phase change reduces.For
Solve this problem, researcher is by amino (- NH2) and methyl (- CH3) be grafted onto mesopore silicon oxide (SBA-15) surface and PEG and answer
Conjunction prepares shaping phase-change material PEG2000/NH2-SBA-15-CH3.Although functional group-NH2With-CH3Presence improve its phase transformation
Enthalpy, but, in mesopore silicon oxide inorganic material surface grafting functional group-NH2With-CH3During this is organically-modified, generally
Need to carry out organic solvent backflow.This not only high energy consumption, and secondary dirt is formed during the toxic solvent such as toluene easily residues in duct
Dye, modifying process is cumbersome in addition, the cycle is long.Therefore, the modified of easy to operate, mild condition, nonhazardous and low cost is found
Method is used for the preparation of shaping phase-change material, is the problem of urgent need to resolve.
The content of the invention
In view of this, it is combined it is necessory to provide a kind of easy to operate, mild condition, nonhazardous and the phase transformation of low cost
Material and preparation method thereof, the phase change composite material obtained by the preparation method has enthalpy of phase change higher, and can avoid liquid
Mutually leak.
The present invention provides a kind of preparation method of phase change composite material, and it is comprised the following steps：
(1) mesoporous silicon oxide is provided, wherein the mesoporous silicon oxide includes multiple passages；
(2) mesoporous silicon oxide is modified by dopamine, dopamine is invested the mesoporous silicon oxide
Passage in；
(3) in the mesoporous silicon oxide being modified through dopamine impregnated in into polyglycol solution, make polyethylene glycol immobilized in
In the passage of mesoporous silicon oxide and as core, phase change composite material is obtained, wherein in the polyethylene glycol and dopamine
Amino and catechol functional group form hydrogen bond and realize being combined closely with the mesoporous silicon oxide.
Wherein, in step (1), mesoporous silicon oxide can be obtained by purchase or following preparation method：
Solution containing template is mixed with silicon source, and hydrolyzes the silicon source, obtain the mesoporous dioxy with template
SiClx, wherein template are tannic acid；
Template in mesoporous silicon oxide with template is removed by washing, mesoporous silicon oxide is obtained.
Wherein, it is described to mix the solution containing template with silicon source, and the silicon source is hydrolyzed, obtain with template
Mesoporous silicon oxide detailed process is as follows：
Template is dissolved in first the first mixed liquor is obtained in the first solvent, wherein first solvent is ethanol；
Then alkali is added to the first mixed liquor, and is stirred the very first time at a temperature of first, obtain the second mixed liquor, wherein
The alkali is concentrated ammonia liquor；
Silicon source is added to the second mixed liquor again, makes the silicon source that hydrolysis to occur, obtain containing template mesoporous two
Silica.
Wherein, the silicon source is at least one in tetraethyl orthosilicate or methyl silicate, the template, alkali, silicon
The mol ratio in source is 0.1:30:0.1~0.1:50:0.15, the molar concentration of template is described in first mixed liquor
0.032mol/L, the molar concentration of the alkali of the addition is 13.4mol/L~15.0mol/L, and first temperature is 20 Celsius
~25 degrees Celsius of degree, the very first time is 2 hours, and the temperature of the hydrolysis is 20 degrees Celsius~25 degrees Celsius, described
The time of hydrolysis is 30 minutes~45 minutes.
Wherein, the size of the passage of mesoporous silicon oxide described in step (1) is 5 nanometers~14 nanometers.
Wherein, by dopamine the mesoporous silicon oxide is modified in step (2) specific as follows：
Dopamine is dissolved in phosphate buffer solution, wherein the pH of the phosphate buffer solution is 8.0；
Mesoporous silicon oxide is added, stirring obtains the mesoporous silicon oxide being modified through dopamine.
Wherein, the ratio of the dopamine and the phosphate buffer solution is 1g:1L.
Wherein, in the mesoporous silicon oxide being modified through dopamine impregnated in into polyglycol solution in step (3), phase is obtained
Change composite material is specially：
The mesoporous silicon oxide being modified through dopamine is placed in vacuum environment, and adds polyglycol solution, it is Celsius in 55
Stirred 3 hours~5 hours at a temperature of~65 degrees Celsius of degree；
Then dry, obtain phase change composite material.
Wherein, the solvent in polyglycol solution is ethanol, polyethylene glycol in the polyglycol solution with through DOPA
The mass ratio of the modified mesoporous silicon oxide of amine is 1:1~9:1.
The present invention also provides a kind of phase change composite material obtained using above-mentioned preparation method, and it is included as the poly- of core
Ethylene glycol and the mesoporous silicon oxide being modified through dopamine as carrier, the polyethylene glycol by with dopamine in amino
Hydrogen bond is formed with catechol functional group and realize being combined closely with the mesoporous silicon oxide.
Compared with prior art, in the preparation method of the phase change composite material that the present invention is provided, by first to mesoporous two
Silica is modified, and dopamine is carried in the passage of mesoporous silicon oxide, then again by polyethylene glycol by with DOPA
Amino in amine and catechol functional group form hydrogen bond and immobilized are combined in the passage of mesoporous silicon oxide, obtaining phase transformation
Material.In the preparation method, the process of the process of dopamine improved silica and immobilized polyethylene glycol is provided without organic
Solvent, during without the operation such as flow back is carried out, energy consumption is low, and the toxic solvent such as no toluene residues in duct, will not form
Secondary pollution, nonhazardous, modifying process is simple in addition, cycle is short, mild condition, and low cost.The preparation method is adapted to big rule
The industrialized production of mould.
In the phase change composite material for obtaining, polyethylene glycol is made as core, the mesoporous silicon oxide being modified through dopamine
Be carrier, polyethylene glycol forms Hydrogenbond by between the amino and catechol group in dopamine, enhance its with
Active force between mesoporous silicon oxide, thus the crystallization behavior of polyethylene glycol can be regulated and controled, the final phase transformation that this is obtained is answered
The enthalpy of phase change of condensation material, thermal conductivity and heat endurance can obtain larger raising, and can prevent polyethylene glycol liquid phase from leaking.
Brief description of the drawings
Fig. 1 is ESEM (SEM) photo of mesoporous SBA-15 used in the embodiment of the present invention 3.
Fig. 2 is the SEM photograph of the phase change composite material obtained by the embodiment of the present invention 3.
Fig. 3 is pure PEG, mesoporous SBA-15, modified mesoporous material Dop-SBA15 and phase in the embodiment of the present invention 3
(curve a corresponds to pure PEG to the FTIR spectrum figure of change composite material PEG/Dop-SBA15；Curve b corresponds to mesoporous oxygen
SiClx SBA-15；Curve c corresponds to modified mesoporous material Dop-SBA15；Curve d corresponds to phase change composite material PEG/Dop-
SBA15)。
Fig. 4 is pure PEG, mesoporous SBA-15, modified mesoporous material Dop-SBA15 and phase in the embodiment of the present invention 3
(curve a corresponds to pure PEG to the Wide angle X-ray diffraction collection of illustrative plates of change composite material PEG/Dop-SBA15；Curve b corresponds to modified Jie
Porous materials Dop-SBA15；Curve c corresponds to phase change composite material PEG/Dop-SBA15).
Fig. 5 is pure PEG and phase change composite material PEG/Dop-SBA15, the phase-change material of comparative example in the embodiment of the present invention 3
(curve a corresponds to pure PEG to the means of differential scanning calorimetry change curve collection of illustrative plates of PEG/Dop-SBA15；Curve b corresponds to the phase of embodiment 3
Change composite material PEG/Dop-SBA15；Curve c corresponds to the phase-change material PEG/Dop-SBA15 of comparative example).
Specific examples below will further illustrate the present invention with reference to above-mentioned accompanying drawing.
Specific embodiment
Phase change composite material provided the present invention and preparation method thereof is described further below.
The present invention provides a kind of preparation method of phase change composite material, and it includes following steps：
S1, there is provided mesoporous silicon oxide, wherein the mesoporous silicon oxide includes multiple passages；
S2, is modified by dopamine to the mesoporous silicon oxide, dopamine is invested the mesoporous silicon oxide
Passage in；And
S3, during the mesoporous silicon oxide being modified through dopamine impregnated in into polyglycol solution, make polyethylene glycol immobilized in
In the passage of mesoporous silicon oxide and as core, phase change composite material is obtained, wherein in the polyethylene glycol and dopamine
Amino and catechol functional group form hydrogen bond and realize being combined closely with the mesoporous silicon oxide.
In step sl, mesoporous silicon oxide can also be bought by self-control by market.The mesoporous silicon oxide it is logical
Road is used to load follow-up dopamine and polyethylene glycol.The channel size of the mesoporous silicon oxide is not limited, preferably 5 nanometers
~14 nanometers.
The mesoporous silicon oxide can be prepared by the following preparation method：
S111, the solution containing template is mixed with silicon source, and hydrolyzes the silicon source, obtains mesoporous with template
Silica, wherein template are tannic acid；
S112, the template in the mesoporous silicon oxide with template is removed by washing, and obtains meso-porous titanium dioxide
Silicon.
Prepare the mesoporous silicon oxide detailed process with template as follows：
Template is dissolved in one first solvent first obtains the first mixed liquor, wherein first solvent is ethanol；
Then alkali is added to the first mixed liquor, and is stirred the very first time at a temperature of first, obtain the second mixed liquor, wherein
The alkali is concentrated ammonia liquor；
Silicon source is added to the second mixed liquor again, makes the silicon source that hydrolysis to occur, obtain containing template mesoporous two
Silica.
Wherein, the silicon source is at least one in tetraethyl orthosilicate or methyl silicate.Hydrolysis of the alkali in silicon source
Play a part of catalyst in reaction.The tannic acid is equally distributed state in the first mixed liquor, in follow-up silicon source
In hydrolytic process, tannic acid uniformly mixes with the silica of generation, and is internally formed multiple passages in silica.
The template, alkali, the mol ratio of silicon source are 0.1:30:0.1~0.1:50:0.15, preferably 0.1:40:
0.12.The molar concentration of template described in first mixed liquor is 0.032mol/L.The molar concentration of the alkali of the addition
It is 13.4mol/L~15.0mol/L.
First temperature is 20 degrees Celsius~25 degrees Celsius.The very first time is 2 hours.The temperature of the hydrolysis
Spend is 20 degrees Celsius~25 degrees Celsius.The time of the hydrolysis is 30 minutes~45 minutes.
In S112, the tannic acid is water-soluble in itself, thus can be by washing, you can it is gone from mesoporous silicon oxide
Remove, so as to get mesoporous silicon oxide form multiple passages.The step of removal tannic acid, is simple to operation, without calcining, cost
It is low, it is environment-friendly.
In step s 2, by dopamine to the meso-porous titanium dioxide Si modification, and it is described mesoporous to be carried on dopamine
In the passage of silica.Specifically, dopamine particle is attached in the passage of the mesoporous silicon oxide by suction-operated,
On the one hand have because the dopamine contains catechol and amido functional group the modified mesoporous silicon oxide for obtaining good
Adhesion, on the other hand, only by simple physical mixed, and dopamine particle is attached to mesoporous silicon oxide, the party
Method avoids the duct blocking that existing organically-modified method is caused.
The mesoporous silicon oxide is modified by dopamine specific as follows：
Dopamine is dissolved in phosphate buffer solution, wherein the pH of the phosphate buffer solution is 8.0；
Mesoporous silicon oxide is added, stirring obtains the mesoporous silicon oxide being modified through dopamine.
Wherein, the ratio of the dopamine and the phosphate buffer solution is 1g:1L.
In step s3, the polyethylene glycol is used as core, the mesoporous silicon oxide as carrier, by polyethylene glycol
Hydrogen bond action between dopamine, and realize polyethylene glycol is immobilized in the passage of the mesoporous silicon oxide.
Prepare comprising the following steps that for phase change composite material：
The mesoporous silicon oxide being modified through dopamine is placed in vacuum environment, and adds polyglycol solution, it is Celsius in 55
Stirred 3 hours~5 hours at a temperature of~65 degrees Celsius of degree；
Then dry, obtain phase change composite material.
Wherein, polyglycol solution and the mesoporous silicon oxide being modified through dopamine are first placed in what is stirred under vacuum environment
Purpose is polyglycol solution is diffused to rapidly in the passage of mesoporous silicon oxide and is full of, and makes polyethylene glycol and DOPA
Stronger hydrogen bond action is formed between amino and catechol group in amine.Afterwards, stirred under normal pressure, obtain this
Phase change composite material more they tend to stabilization.
Solvent in polyglycol solution is ethanol.Polyethylene glycol in the polyglycol solution is modified with through dopamine
Mesoporous silicon oxide mass ratio be 1:1~9:1, preferably 7:3.
The present invention also provides a kind of phase change composite material obtained using above-mentioned preparation method.The phase change composite material includes
Polyethylene glycol as core and the mesoporous silicon oxide being modified through dopamine as carrier.The polyethylene glycol by with it is many
Amino and catechol functional group in bar amine form hydrogen bond and realize being combined closely with the mesoporous silicon oxide.
Compared with prior art, in the preparation method of the phase change composite material that the present invention is provided, by first to mesoporous two
Silica is modified, and dopamine is carried in the passage of mesoporous silicon oxide, then again by polyethylene glycol by with DOPA
Amino in amine and catechol functional group form hydrogen bond and immobilized are combined in the passage of mesoporous silicon oxide, obtaining phase transformation
Material.In the preparation method, the process of the process of dopamine improved silica and immobilized polyethylene glycol is provided without organic
Solvent, during without the operation such as flow back is carried out, energy consumption is low, and the toxic solvent such as no toluene residues in duct, will not form
Secondary pollution, nonhazardous, modifying process is simple in addition, cycle is short, mild condition, and low cost.The preparation method is adapted to big rule
The industrialized production of mould.
In the phase change composite material for obtaining, polyethylene glycol is made as core, the mesoporous silicon oxide being modified through dopamine
Be carrier, polyethylene glycol forms Hydrogenbond by between the amino and catechol group in dopamine, enhance its with
Active force between mesoporous silicon oxide, thus the crystallization behavior of polyethylene glycol can be regulated and controled, the final phase transformation that this is obtained is answered
The enthalpy of phase change of condensation material, thermal conductivity and heat endurance can obtain larger raising, and can prevent polyethylene glycol liquid phase from leaking.
Hereinafter, will further illustrate in conjunction with specific embodiments.
Embodiment 1
(1) preparation of mesoporous silicon oxide
544mg tannic acids are dissolved in 100mL absolute ethyl alcohols at room temperature, 50mL concentrated ammonia liquors are added, 1min is quickly stirred, it
0.6mL tetraethyl orthosilicates are added afterwards, at room temperature quick stirring 2h.By suspension centrifugation after the completion of reaction, distillation washing
Wash repeatedly, obtain mesoporous silicon oxide TAMS.
(2) preparation of the mesoporous silicon oxide being modified through dopamine
0.045g dopamines are dissolved in the phosphate buffer solution of the pH 8.5 that 45mL is newly prepared, are rapidly added afterwards
0.225g mesoporous silicon oxide TAMS, at room temperature by suspension centrifugal dehydration, distillation water washing 2 times, 40 DEG C of vacuum after stirring 3h
24h is dried, the mesoporous silicon oxide Dop-TAMS being modified through dopamine is obtained.
(3) preparation of phase change composite material
50mg Dop-TAMS are placed in beaker, addition 15mL 8g/L PEG ethanol solutions, 65 DEG C of atmospheric agitation 4h, so
Suspension is placed in 65 DEG C of air dry ovens afterwards dries 24h, obtain phase change composite material PEG/Dop-TAMS.
Embodiment 2
(1) preparation of mesoporous silicon oxide
544mg tannic acids are dissolved in 100mL absolute ethyl alcohols at room temperature, 50mL concentrated ammonia liquors are added, 1min is quickly stirred, it
0.6mL tetraethyl orthosilicates are added afterwards, at room temperature quick stirring 2h.By suspension centrifugation after the completion of reaction, distillation washing
Wash repeatedly, obtain mesoporous silicon oxide TAMS.
(2) preparation of the mesoporous silicon oxide being modified through dopamine
0.045g dopamines are dissolved in the phosphate buffer solution of the pH 8.5 that 45mL is newly prepared, are rapidly added afterwards
0.225g mesoporous silicon oxide TAMS, at room temperature by suspension centrifugal dehydration, distillation water washing 2 times, 40 DEG C of vacuum after stirring 3h
24h is dried, the mesoporous silicon oxide Dop-TAMS being modified through dopamine is obtained.
(3) preparation of phase change composite material
50mg Dop-TAMS are placed in beaker, addition 15mL 8g/L PEG ethanol solutions, 75 DEG C of atmospheric agitation 4h,
Then suspension is placed in 75 DEG C of air dry ovens and dries 24h, obtain phase change composite material PEG/Dop-TAMS.
In order to illustrate the characteristic of phase change composite material of the present invention, a comparative example and embodiment 3 are also provided.
The preparation method of phase change composite material is substantially the same manner as Example 1 in embodiment 3, and difference is, mesoporous oxygen
SiClx silicon is the mesoporous SBA-15 bought by market, and composite phase-change material PEG/Dop-SBA-15 is finally obtained.
The preparation process of phase-change material is in comparative example：Directly fixed using the mesoporous SBA-15 of market purchase
PEG obtains phase-change material PEG/SBA-15.
The phase-change material PEG/ that the composite phase-change material PEG/Dop-SBA-15 that embodiment 3 is obtained is obtained with comparative example
SBA-15 carries out following sign, as a result sees Fig. 1~Fig. 4.
It is multiple with the mesoporous SBA-15 (Dop-SBA-15) being modified through dopamine from Fig. 1 and Fig. 2, PEG success
It is combined together.
As seen from Figure 3, compare the curve d corresponding to the phase change composite material and curve c corresponding to modified mesoporous material,
Corresponding to the curve a of pure PEG, it is seen then that obvious new peak is not observed in curve d, the phase of this explanation PEG and Dop-SBA15
Interaction is physics, and this interaction is prevented from phase change composite material and is revealed in phase transition process.
From fig. 4, it can be seen that pure PEG shows two strong diffraction maximums at 19.1 ° and 23.3 °, this shows pure PEG materials
Highly crystalline structure.And the diffraction maximum position of phase change composite material PEG/dop-SBA15 materials is substantially identical with pure PEG materials,
Peak value is located at 18.9 ° and 23.1 ° respectively, the crystal structure of the introducing without influence PEG of this explanation mesoporous material, i.e., do not influence
The crystallinity of PEG.
As seen from Figure 5, pure PEG (show endothermic fusion peak at 64.1 DEG C see curve a), melting enthalpy is 125.4J/g,
Exothermic crystallization peak is shown at 36.0 DEG C, solidification enthalpy is 73.9J/g.Comparative example phase-change material PEG/SBA15 is (see curve c) 63.0
DEG C when show endothermic fusion peak, melting enthalpy is 45.0J/g, shows exothermic crystallization peak at 33.5 DEG C, and solidification enthalpy is 13.9J/g.
It can be seen that, after be adsorbed onto PEG in SBA15 mesoporous materials by comparative example, its heat enthalpy value is drastically reduced.And embodiment 3 is (see curve b) phases
Change composite material PEG/dop-SBA15 shows endothermic fusion peak at 61.5 DEG C, and melting enthalpy is 118.6J/g, at 38.5.0 DEG C
Display exothermic crystallization peak, solidification enthalpy is 59.5J/g.It can be seen that, the phase change composite material PEG/dop-SBA15 of embodiment 3 has higher
Heat enthalpy value, this explanation using modified mesoporous material Dop-SBA15 be carrier fix PEG prepare shaping phase-change material, not only may be used
To avoid PEG from being revealed in phase transition process, and the thermal storage performance of PEG is not interfered with.
The explanation of above example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that right
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these are improved and modification is also fallen into the protection domain of the claims in the present invention.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (10)
1. a kind of preparation method of phase change composite material, it is comprised the following steps：
(1) mesoporous silicon oxide is provided, wherein the mesoporous silicon oxide includes multiple passages；
(2) mesoporous silicon oxide is modified by dopamine, dopamine is invested the logical of the mesoporous silicon oxide
In road；
(3) in the mesoporous silicon oxide being modified through dopamine impregnated in into polyglycol solution, make polyethylene glycol immobilized in mesoporous
In the passage of silica and as core, phase change composite material is obtained, wherein the amino in the polyethylene glycol and dopamine
Hydrogen bond is formed with catechol functional group and realize being combined closely with the mesoporous silicon oxide.
2. the preparation method of phase change composite material as claimed in claim 1, it is characterised in that in step (1), meso-porous titanium dioxide
Silicon is prepared by the following preparation method：
Solution containing template is mixed with silicon source, and hydrolyzes the silicon source, obtain the mesoporous silicon oxide with template,
Wherein template is tannic acid；
Template in mesoporous silicon oxide with template is removed by washing, mesoporous silicon oxide is obtained.
3. the preparation method of phase change composite material as claimed in claim 2, it is characterised in that the solution that template will be contained
Mix with silicon source, and hydrolyze the silicon source, obtain the mesoporous silicon oxide detailed process with template as follows：
Template is dissolved in first the first mixed liquor is obtained in the first solvent, wherein first solvent is ethanol；
Then alkali is added to the first mixed liquor, and is stirred the very first time at a temperature of first, the second mixed liquor is obtained, wherein described
Alkali is concentrated ammonia liquor；
Silicon source is added to the second mixed liquor again, makes the silicon source that hydrolysis to occur, obtain the meso-porous titanium dioxide containing template
Silicon.
4. the preparation method of phase change composite material as claimed in claim 3, it is characterised in that the silicon source is tetraethyl orthosilicate
Or at least one in methyl silicate, the template, alkali, the mol ratio of silicon source are 0.1:30:0.1~0.1:50:0.15,
The molar concentration of template described in first mixed liquor is 0.032mol/L, and the molar concentration of the alkali of the addition is
13.4mol/L~15.0mol/L, first temperature is 20 degrees Celsius~25 degrees Celsius, and the very first time is 2 hours, institute
It is 20 degrees Celsius~25 degrees Celsius to state the temperature of hydrolysis, and the time of the hydrolysis is 30 minutes~45 minutes.
5. the preparation method of phase change composite material as claimed in claim 1, it is characterised in that mesoporous two described in step (1)
The size of the passage of silica is 5 nanometers~14 nanometers.
6. the preparation method of phase change composite material as claimed in claim 1, it is characterised in that pass through DOPA in step (2)
Amine is modified specific as follows to the mesoporous silicon oxide：
Dopamine is dissolved in phosphate buffer solution, wherein the pH of the phosphate buffer solution is 8.0；
Mesoporous silicon oxide is added, stirring obtains the mesoporous silicon oxide being modified through dopamine.
7. the preparation method of phase change composite material as claimed in claim 6, it is characterised in that the dopamine and the phosphoric acid
The ratio of cushioning liquid is 1g:1L.
8. the preparation method of phase change composite material as claimed in claim 1, it is characterised in that will be through dopamine in step (3)
Modified mesoporous silicon oxide impregnated in polyglycol solution, obtains phase change composite material and is specially：
The mesoporous silicon oxide that will be modified through dopamine is placed in vacuum environment, and adds polyglycol solution, in 55 degrees Celsius~
Stirred 3 hours~5 hours at a temperature of 65 degrees Celsius；
Then dry, obtain phase change composite material.
9. the preparation method of phase change composite material as claimed in claim 8, it is characterised in that the solvent in polyglycol solution
It is ethanol, the polyethylene glycol in the polyglycol solution is 1 with the mass ratio of the mesoporous silicon oxide being modified through dopamine:1
~9:1.
10. it is a kind of using the phase change composite material that such as claim 1~9 any one preparation method is obtained, it is characterised in that its bag
Include the mesoporous silicon oxide being modified through dopamine as the polyethylene glycol of core and as carrier, the polyethylene glycol by with
Amino and catechol functional group in dopamine form hydrogen bond and realize being combined closely with the mesoporous silicon oxide.
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| CN110527493A (en) * | 2019-07-04 | 2019-12-03 | 浙江海洋大学 | A kind of preparation method of shaping phase-change material |
| CN110527494A (en) * | 2019-07-04 | 2019-12-03 | 浙江海洋大学 | A kind of preparation method of the mesoporous compound organic phase change material of silicon substrate high thermal conductivity |
| CN112574719A (en) * | 2020-12-29 | 2021-03-30 | 凯盛石墨碳材料有限公司 | Preparation method of phase change energy storage material based on calcium carbonate nano vesicles |
| CN112778979A (en) * | 2021-01-07 | 2021-05-11 | 华中科技大学 | High-thermal-conductivity polymer-shaped composite phase-change material and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109825254A (en) * | 2019-03-14 | 2019-05-31 | 华南农业大学 | A kind of polyethylene glycol wood powder composite phase-change energy storage material and its preparation method and application |
| CN109825254B (en) * | 2019-03-14 | 2021-03-16 | 华南农业大学 | Polyethylene glycol wood powder composite phase change energy storage material and preparation method and application thereof |
| CN110305634A (en) * | 2019-07-04 | 2019-10-08 | 浙江海洋大学 | A kind of preparation method of carbon ball base composite phase-change material |
| CN110527493A (en) * | 2019-07-04 | 2019-12-03 | 浙江海洋大学 | A kind of preparation method of shaping phase-change material |
| CN110527494A (en) * | 2019-07-04 | 2019-12-03 | 浙江海洋大学 | A kind of preparation method of the mesoporous compound organic phase change material of silicon substrate high thermal conductivity |
| CN112574719A (en) * | 2020-12-29 | 2021-03-30 | 凯盛石墨碳材料有限公司 | Preparation method of phase change energy storage material based on calcium carbonate nano vesicles |
| CN112778979A (en) * | 2021-01-07 | 2021-05-11 | 华中科技大学 | High-thermal-conductivity polymer-shaped composite phase-change material and preparation method thereof |
| CN112778979B (en) * | 2021-01-07 | 2021-10-26 | 华中科技大学 | High-thermal-conductivity polymer-shaped composite phase-change material and preparation method thereof |
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