CN104830280A - Shape-stabilized phase change material for passive thermal protection and preparation method thereof - Google Patents
Shape-stabilized phase change material for passive thermal protection and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a middle-temperature composite shape-stabilized phase change heat storage material that can be applied to passive thermal protection. Metal nano wires are taken as the thermal conductive filling material, and sugar alcohol is taken as the phase change heat storage material. The preparation method comprises the following steps: at first, metal nano wires and sugar alcohol are dispersed into anhydrous ethanol to form a stable suspension liquid under the actions of a supersonic treatment and a surfactant, then adding aniline and an organic acid, evenly mixing, then adding an oxidant to make aniline carry out polymerization reactions, wherein the generated polyaniline settles on the surface of sugar alcohol/metal nano wire particles, and separating and purifying the reaction products to obtain the composite shape-stabilized phase change heat storage material. The prepared composite shape-stabilized phase change heat storage material has the advantages of simple technology, low cost, high phase change potential heat, moderate thermal conductive performance, and no need for encapsulation, the performance of sugar alcohol phase change heat storage materials is effectively improved, and the application range is enlarged.
Description
Technical field
The present invention relates to the preparation of composite shape-setting phase-change heat-storage material; a kind of doping metals nano wire has very high latent heat of phase change specifically; and temperature below or above during its transformation temperature all in solid-state and warm composite shape-setting phase-change heat-storage material and preparation method thereof in dimensionally stable; the heat conductivility of this material is moderate, can be used as the heat accumulating of passive type thermal protection system.
Background technology
Phase-change heat-storage material is that a class is absorbed by material generation phase in version or released a large amount of heat energy, the material that material self-temperature is constant or change is very little.The application of phase-change heat-storage material can be divided into two large classes: a class is that heat energy storage is to realize the efficiency utilization of energy; One class is passive type Thermal protection, namely by absorbing or discharge the heat from environment or the release of protected object, produces a thermal boundary and protected object is in suitable temperature environment simultaneously between environment and protected object.No matter phase-change heat-storage material to be applied to which field, its heat storage capacity is all the bigger the better, but different to the requirement of heat conductivility.The phase-change heat-storage material of heat energy storage requires that thermal conductivity is more high better, to realize quick absorption or the release of heat; The phase-change heat-storage material of Thermal protection then requires that thermal conductivity is moderate, can have certain suction exotherm rate, can play again the effect of thermal boundary, thus makes temperature not produce excessive fluctuation.
The phase-change heat-storage material of current most study is solid-liquid phase change heat accumulating, and it has larger latent heat of phase change and less phase transformation volume change.Solid-liquid phase change heat accumulating can be divided into mineral-type phase-change heat-storage material and organic phase-change heat-storage material from material character.Mineral-type phase-change heat-storage material has larger phase-change thermal storage capacity, but there is severe corrosive and transition kinetics poor-performing, the large and deficiency of instability of condensate depression.The advantage of organic phase-change heat-storage material is non-corrosiveness, and transition kinetics performance is good, and without excessively cold, and stability is very good, applies more convenient, but its heat conductivility is very poor, usually only has about 0.2 ~ 0.3W/mK, is necessary to regulate and control its heat conductivility.It is higher that metal nano has thermal conductivity, and specific surface area is high, the feature that length-to-diameter ratio is large, is a kind of desirable enhanced thermal conduction filler.Consider the heat storage capacity of material, metal nano can not add too much, makes the thermal conductivity of the composite phase-change heat-storage material obtained can not be very high, but is in moderate level, just in time can be applicable to passive type Thermal protection field.
Another problem that solid-liquid phase change heat accumulating exists there is liquid state in use procedure, therefore must solve the problem of material package.A terms of settlement changes solid-liquid phase change heat accumulating into fixed phase change heat accumulating.When the transformation temperature of temperature higher than fixed phase change heat accumulating, it is macroscopically still showing as solid-state, solves the problem of encapsulation.In addition, in fixed phase change heat accumulating, the content of propping material can be very low, therefore has very high latent heat of phase change; The preparation process of material is usually fairly simple, and this is the main advantage of fixed phase change heat accumulating compared to microcapsule phase-change heat accumulating.Glycitols material is as a kind of organic phase-change heat-storage material, and its solid-liquid phase change temperature between 83 ~ 190 degree, and has high latent heat of phase change, and it is also a class environmental friendliness shaped material, is applied to sweeting agent in foodstuff additive field.But as solid-liquid phase change heat accumulating, it must solve the problem of encapsulation.Polyaniline is a class conducting polymer composite, and preparation process is very simple, and it has excellent environmental stability and thermostability simultaneously, can not soften before pyrolysis, can be used as a kind of excellent propping material and be applied to fixed phase change heat accumulating field.Consider its thermostability, when being applied to the propping material of glycitols fixed phase change heat accumulating, compare other macromolecular materials, polyaniline has more obvious advantage.
Based on this, the invention discloses a kind of is propping material with polyaniline, and being phase-change heat-storage material with sugar alcohol, take metal nanometer line as composite shape-setting phase-change heat-storage material of heat conductive filler and preparation method thereof.The composite shape-setting phase-change heat-storage material prepared by the method, heat conductive filler, can not be settlement separate and affect its performance in the use procedure of composite shape-setting phase-change heat-storage material by propping material anchoring.Meanwhile, the composite shape-setting phase-change heat-storage material heat conductivility obtained is moderate, can be used as the heat accumulating of passive type thermal protection system within the scope of relevant temperature.
Summary of the invention
The object of this invention is to provide a kind of composite shape-setting phase-change heat-storage material with high latent heat of phase change and preparation method thereof.This composite shape-setting phase-change heat-storage material is propping material with polyaniline, is phase-change heat-storage material with sugar alcohol, take metal nanometer line as heat conductive filler; Its preparation method is simple, and heat conductivility is moderate, can be used as the heat accumulating of passive type thermal protection system.
For achieving the above object, the technical solution used in the present invention is:
Can be used as a preparation method for the composite shape-setting phase-change heat-storage material of passive type thermal protection system heat accumulating, be specially: first a certain amount of metal nanometer line is mixed also supersound process with dehydrated alcohol and within 20 ~ 60 minutes, obtain metal nanometer line/dehydrated alcohol mixed solution; Add a certain amount of sugar alcohol, tensio-active agent and a certain amount of dehydrated alcohol again, and sugar alcohol and tensio-active agent are all dissolved mixture stirring and refluxing at 50 ~ 75 DEG C; With vigorous stirring solution is down to room temperature and obtains stable suspension; Aniline and organic acid is added and after being uniformly mixed in this suspension, mixture temperature is down to 5 ~ 20 DEG C, then add benzoyl peroxide and cause the polyreaction of aniline, react after 20 ~ 30 hours through filtration, organic solvent washing drying obtains composite shape-setting phase-change heat-storage material.
Described sugar alcohol be Xylitol, Sorbitol Powder, erythritol, maltose alcohol, N.F,USP MANNITOL and sweet and pure in one; Described metal nanometer line is the one of copper nano-wire and nano silver wire; Described tensio-active agent is the one in Macrogol 4000, polyethylene glycol 6000, PEG 8000, PEG20000 and PEG 20000; Described organic solvent is the one of dehydrated alcohol or acetone, and described organic acid is the one of p-methyl benzenesulfonic acid and 5-sulphosalicylic acid.
The consumption of described sugar alcohol is 70 ~ 85% of sugar alcohol and aniline quality sum, in the described stable suspension obtained, the content of sugar alcohol is 16.7 ~ 25.0 g/L, the amount of the described a certain amount of dehydrated alcohol added is 1 ~ 2.33 times of the volume of dehydrated alcohol used in described metal nanometer line/dehydrated alcohol mixed solution, the consumption of described nano silver wire is 5 ~ 67% of sugar alcohol used and aniline quality sum, in described metal nanometer line/dehydrated alcohol mixed solution, the content of metal nanometer line is 3 ~ 42 g/L, described dosage of surfactant is 35 ~ 60% of sugar alcohol quality used, , described organic acid consumption is that after making it be dissolved in suspension, its concentration is 0.068 ~ 0.18mol/L, described benzoyl peroxide consumption is 2 ~ 3.5 times of the amount of substance of aniline used.
In described composite shape-setting phase-change heat-storage material, polyaniline is propping material, and sugar alcohol is phase-change heat-storage material, and metal nanometer line is heat conductive filler; When temperature is higher than when containing sugar alcohol fusing point contained by composite shape-setting phase-change heat-storage material, this composite shape-setting phase-change heat-storage material outward appearance is still solid-state and dimensionally stable, and the thermal conductivity of composite shape-setting phase-change heat-storage material increases along with the increase of metal nanometer line content.
Tool of the present invention has the following advantages.
The invention provides composite shape-setting phase-change heat-storage material of a kind of doping metals nano wire and preparation method thereof, this material has high latent heat of phase change, and heat conductivility is moderate, can be used as the heat accumulating of passive type thermal protection system.The thermal stability of propping material polyaniline meets the requirement of composite shape-setting phase-change heat-storage material working temperature completely simultaneously.The preparation method of this composite shape-setting phase-change heat-storage material is simple, and cost is lower.Utilize the present invention effectively can improve the performance of glycitols phase-change heat-storage material, expand its range of application.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, but these embodiments do not limit the scope of the invention.
The Q2000 type differential scanning calorimeter (DSC) that the present invention uses TA company of the U.S. to produce is tested the thermal storage performance of described composite shape-setting phase-change heat-storage material as follows: the composite shape-setting phase-change heat-storage material taking 1.5 ~ 4mg puts into sample crucible, before and after the transformation temperature of phase-change heat-storage material in the temperature range of about 40 DEG C, scan with the temperature rise rate of 10 DEG C/min; Then the program using instrument to carry processes experimental result, obtains the start-up phase temperature of prepared composite shape-setting phase-change heat-storage material, phase transformation peak temperature and latent heat of phase change.
The DRX-II-RW type heat conduction coefficient tester that the present invention uses Xiang Tan Hua Feng company to produce measures the thermal conductivity of described composite shape-setting phase-change heat-storage material, detailed process is: take about 1.5g composite shape-setting phase-change heat-storage material, a right cylinder is made at the pressure of 1MPa with tabletting machine, the hot-side temperature of setting instrument is all constant with the temperature of the water coolant flowing through cold junction, two temperatures difference is 15 DEG C, utilize instrument to carry after the temperature-stable of hot junction and cold junction thermal conductivity that software records material.
embodiment 1.
1) prepare suspension: get 0.204g nano silver wire, is mixed in round-bottomed flask with 40mL dehydrated alcohol, and supersound process obtains nano silver wire/dehydrated alcohol mixed solution for 30 minutes; Add 2.0g erythritol toward above-mentioned mixed solution, 0.7g PEG20000 and 60mL dehydrated alcohol, put into the water-bath of 75 DEG C, after return stirring makes erythrose and polyoxyethylene glycol dissolve completely, stop heating, vigorous stirring, allows system cool to greenhouse and obtains stable suspension.
2) suspension cooling: add 0.51 g aniline and 1.72g p-methyl benzenesulfonic acid and after being uniformly mixed in this suspension, then mixture is moved in ice-water bath, vigorous stirring also makes mixture temperature be down to 5 ~ 10 DEG C.
3) aniline polymerization: add the polyreaction that 2.658 g benzoyl peroxides cause aniline in the mixtures of above-mentioned 5 ~ 10 DEG C, and allow mixture naturally heat up, react 24 hours.
4) separation and purification product: the mixture after having reacted is filtered, by filter cake washing with acetone, then composite shape-setting phase-change heat-storage material is dried and obtained to filter cake in 60 DEG C.
5) heat accumulation and thermal conductivity test result: start-up phase temperature is 116.6 DEG C, phase transformation peak temperature is 121.0 DEG C, and latent heat of phase change is 223.6J/g, thermal conductivity 0.349W/mK.
6) stability test: material tabletting machine is made a right cylinder at the pressure of 1MPa, puts into the thermostat container of 130 DEG C, observes cylindrical shape and does not change and do not have liquid remittance to leak after 12 hours.
embodiment 2.
1) prepare suspension: get 1.67g nano silver wire, is mixed in round-bottomed flask with 40mL dehydrated alcohol, and supersound process obtains nano silver wire/dehydrated alcohol mixed solution for 60 minutes; Add 2.0g erythritol toward above-mentioned mixed solution, 0.7g PEG20000 and 60mL dehydrated alcohol, put into the water-bath of 75 DEG C, after return stirring makes erythrose and polyoxyethylene glycol dissolve completely, stop heating, vigorous stirring, allows system cool to greenhouse and obtains stable suspension.
2) suspension cooling: add 0.51 g aniline and 1.72g p-methyl benzenesulfonic acid and after being uniformly mixed in this suspension, then mixture is moved in ice-water bath, vigorous stirring also makes mixture temperature be down to 5 ~ 10 DEG C.
3) aniline polymerization: add the polyreaction that 3.315 g benzoyl peroxides cause aniline in the mixtures of above-mentioned 5 ~ 10 DEG C, and allow mixture naturally heat up, react 24 hours.
4) separation and purification product: the mixture after having reacted is filtered, by filter cake washing with acetone, then composite shape-setting phase-change heat-storage material is dried and obtained to filter cake in 60 DEG C.
5) heat accumulation and thermal conductivity test result: start-up phase temperature is 113.7 DEG C, phase transformation peak temperature is 120.5 DEG C, and latent heat of phase change is 186.8J/g, thermal conductivity 0.845 W/mK.
6) stability test: material tabletting machine is made a right cylinder at the pressure of 1MPa, puts into the thermostat container of 130 DEG C, observes cylindrical shape and does not change and do not have liquid remittance to leak after 12 hours.
embodiment 3.
1) prepare suspension: get 0.124g nano silver wire, is mixed in round-bottomed flask with 40mL dehydrated alcohol, and supersound process obtains nano silver wire/dehydrated alcohol mixed solution for 20 minutes; Add 2.0g erythritol toward above-mentioned mixed solution, 1g PEG20000 and 40mL dehydrated alcohol, put into the water-bath of 70 DEG C, after return stirring makes erythrose and polyoxyethylene glycol dissolve completely, stop heating, vigorous stirring, allows system cool to greenhouse and obtains stable suspension.
2) suspension cooling: add 0.35 g aniline and 0.94g p-methyl benzenesulfonic acid and after being uniformly mixed in this suspension, then mixture is moved in cooling bath, vigorous stirring also makes mixture temperature be down to 10 ~ 20 DEG C.
3) aniline polymerization: add the polyreaction that 3.185 g benzoyl peroxides cause aniline in the mixtures of above-mentioned 10 ~ 20 DEG C, and allow mixture naturally heat up, react 24 hours.
4) separation and purification product: the mixture after having reacted is filtered, by filter cake washing with acetone, then composite shape-setting phase-change heat-storage material is dried and obtained to filter cake in 60 DEG C.
5) heat accumulation and thermal conductivity test result: start-up phase temperature is 112.0 DEG C, phase transformation peak temperature is 120.5 DEG C, and latent heat of phase change is 232.1J/g, thermal conductivity 0.297W/mK.
6) stability test: material tabletting machine is made a right cylinder at the pressure of 1MPa, puts into the thermostat container of 130 DEG C, observes cylindrical shape and does not change and do not have liquid remittance to leak after 12 hours.
embodiment 4.
1) prepare suspension: get 1g nano silver wire, is mixed in round-bottomed flask with 50mL dehydrated alcohol, and supersound process obtains nano silver wire/dehydrated alcohol mixed solution for 40 minutes; Add 2.0g erythritol toward above-mentioned mixed solution, 1.2g PEG20000 and 70mL dehydrated alcohol, put into the water-bath of 50 DEG C, after return stirring makes erythrose and polyoxyethylene glycol dissolve completely, stop heating, vigorous stirring, allows system cool to greenhouse and obtains stable suspension.
2) suspension cooling: add 0.85 g aniline and 3.7g p-methyl benzenesulfonic acid and after being uniformly mixed in this suspension, then mixture is moved in cooling bath, vigorous stirring also makes mixture temperature be down to 10 ~ 20 DEG C.
3) aniline polymerization: add the polyreaction that 4.42 g benzoyl peroxides cause aniline in the mixtures of above-mentioned 10 ~ 20 DEG C, and allow mixture naturally heat up, react 24 hours.
4) separation and purification product: the mixture after having reacted is filtered, by filter cake washing with acetone, then composite shape-setting phase-change heat-storage material is dried and obtained to filter cake in 60 DEG C.
5) heat accumulation and thermal conductivity test result: start-up phase temperature is 113.4 DEG C, phase transformation peak temperature be 119.7 DEG C and latent heat of phase change is 195.8J/g, thermal conductivity 0.694 W/mK.
6) stability test: material tabletting machine is made a right cylinder at the pressure of 1MPa, puts into the thermostat container of 130 DEG C, observes cylindrical shape and does not change and do not have liquid remittance to leak after 12 hours.
embodiment 5.
1) prepare suspension: get 0.63g nano silver wire, is mixed in round-bottomed flask with 30mL dehydrated alcohol, and supersound process obtains nano silver wire/dehydrated alcohol mixed solution for 30 minutes; Add 2.0g Xylitol toward above-mentioned mixed solution, 0.9g PEG 20000 and 70mL dehydrated alcohol, put into the water-bath of 75 DEG C, after return stirring makes Xylitol and polyoxyethylene glycol dissolve completely, stop heating, vigorous stirring, allows system cool to greenhouse and obtains stable suspension.
2) suspension cooling: add 0.51 g aniline and 1.72g p-methyl benzenesulfonic acid and after being uniformly mixed in this suspension, then mixture is moved in ice-water bath, vigorous stirring also makes mixture temperature be down to 5 ~ 10 DEG C.
3) aniline polymerization: add the polyreaction that 2.658 g benzoyl peroxides cause aniline in the mixtures of above-mentioned 5 ~ 10 DEG C, and allow mixture naturally heat up, react 24 hours.
4) separation and purification product: the mixture after having reacted is filtered, by filter cake washing with acetone, then composite shape-setting phase-change heat-storage material is dried and obtained to filter cake in 60 DEG C.
5) heat accumulation and thermal conductivity test result: start-up phase temperature is 87.8 DEG C, phase transformation peak temperature is 94.1 DEG C, and latent heat of phase change is 154.6J/g, thermal conductivity 0.563W/mK.
6) stability test: material tabletting machine is made a right cylinder at the pressure of 1MPa, puts into the thermostat container of 110 DEG C, observes cylindrical shape and does not change and do not have liquid remittance to leak after 12 hours.
embodiment 6.
1) prepare suspension: get 1.08g nano silver wire, is mixed in round-bottomed flask with 40mL dehydrated alcohol, and supersound process obtains nano silver wire/dehydrated alcohol mixed solution for 30 minutes; Add 2.0g Sorbitol Powder toward above-mentioned mixed solution, 1.2g Macrogol 4000 and 60mL dehydrated alcohol, put into the water-bath of 75 DEG C, after return stirring makes Sorbitol Powder and polyoxyethylene glycol dissolve completely, stop heating, vigorous stirring, allows system cool to greenhouse and obtains stable suspension.
2) suspension cooling: add 0.51 g aniline and 3.44g p-methyl benzenesulfonic acid and after being uniformly mixed in this suspension, then mixture is moved in ice-water bath, vigorous stirring also makes mixture temperature be down to 5 ~ 10 DEG C.
3) aniline polymerization: add the polyreaction that 3.315 g benzoyl peroxides cause aniline in the mixtures of above-mentioned 5 ~ 10 DEG C, and allow mixture naturally heat up, react 24 hours.
4) separation and purification product: the mixture after having reacted is filtered, by filter cake washing with acetone, then composite shape-setting phase-change heat-storage material is dried and obtained to filter cake in 60 DEG C.
5) heat accumulation and thermal conductivity test result: start-up phase temperature is 88.3 DEG C, phase transformation peak temperature be 94.1 DEG C and latent heat of phase change is 102.6J/g, thermal conductivity 0.746W/mK.
6) stability test: material tabletting machine is made a right cylinder at the pressure of 1MPa, puts into the thermostat container of 110 DEG C, observes cylindrical shape and does not change and do not have liquid remittance to leak after 12 hours.
embodiment 7.
1) prepare suspension: get 1.67g copper nano-wire, is mixed in round-bottomed flask with 40mL dehydrated alcohol, and supersound process obtains copper nano-wire/dehydrated alcohol mixed solution for 30 minutes; Add 2.0g maltose alcohol toward above-mentioned mixed solution, 1g PEG 8000 and 60mL dehydrated alcohol, put into the water-bath of 75 DEG C, after return stirring makes maltose alcohol and polyoxyethylene glycol dissolve completely, stop heating, vigorous stirring, allows system cool to greenhouse and obtains stable suspension.
2) suspension cooling: add 0.51 g aniline and 2.542g5-sulfonic group Whitfield's ointment and after being uniformly mixed in this suspension, then mixture is moved in ice-water bath, vigorous stirring also makes mixture temperature be down to 5 ~ 10 DEG C.
3) aniline polymerization: add the polyreaction that 2.658 g benzoyl peroxides cause aniline in the mixtures of above-mentioned 5 ~ 10 DEG C, and allow mixture naturally heat up, react 24 hours.
4) separation and purification product: the mixture after having reacted is filtered, by filter cake washing with acetone, then composite shape-setting phase-change heat-storage material is dried and obtained to filter cake in 60 DEG C.
5) heat accumulation and thermal conductivity test result: start-up phase temperature is 143.6 DEG C, phase transformation peak temperature is 147.9 DEG C, and latent heat of phase change is 86.5J/g, thermal conductivity 0.837 W/mK.
6) stability test: material tabletting machine is made a right cylinder at the pressure of 1MPa, puts into the thermostat container of 160 DEG C, observes cylindrical shape and does not change and do not have liquid remittance to leak after 12 hours.
embodiment 8.
1) prepare suspension: get 0.63g copper nano-wire, is mixed in round-bottomed flask with 30mL dehydrated alcohol, and supersound process obtains copper nano-wire/dehydrated alcohol mixed solution for 30 minutes; Add 2.0g N.F,USP MANNITOL toward above-mentioned mixed solution, 0.9g polyethylene glycol 6000 and 70mL dehydrated alcohol, put into the water-bath of 75 DEG C, after return stirring makes N.F,USP MANNITOL and polyoxyethylene glycol dissolve completely, stop heating, vigorous stirring, allows system cool to greenhouse and obtains stable suspension.
2) suspension cooling: add 0.51 g aniline and 1.72g p-methyl benzenesulfonic acid and after being uniformly mixed in this suspension, then mixture is moved in ice-water bath, vigorous stirring also makes mixture temperature be down to 5 ~ 10 DEG C.
3) aniline polymerization: add the polyreaction that 2.658 g benzoyl peroxides cause aniline in the mixtures of above-mentioned 5 ~ 10 DEG C, and allow mixture naturally heat up, react 24 hours.
4) separation and purification product: the mixture after having reacted is filtered, by filter cake absolute ethanol washing, then composite shape-setting phase-change heat-storage material is dried and obtained to filter cake in 60 DEG C.
5) heat accumulation and thermal conductivity test result: start-up phase temperature is 161.8 DEG C, phase transformation peak temperature is 165.7 DEG C, and latent heat of phase change is 205.6J/g, thermal conductivity 0.578 W/mK.
6) stability test: material tabletting machine is made a right cylinder at the pressure of 1MPa, puts into the thermostat container of 190 DEG C, observes cylindrical shape and does not change and do not have liquid remittance to leak after 12 hours.
embodiment 9.
1) prepare suspension: get 0.28g copper nano-wire, is mixed in round-bottomed flask with 40mL dehydrated alcohol, and supersound process obtains copper nano-wire/dehydrated alcohol mixed solution for 20 minutes; Add 2.0g toward above-mentioned mixed solution sweet and pure, 0.9g PEG20000 and 60mL dehydrated alcohol, put into the water-bath of 75 DEG C, and after return stirring makes sweet and pure and polyoxyethylene glycol dissolve completely, stop heating, vigorous stirring, allows system cool to greenhouse and obtain stable suspension.
2) suspension cooling: add 0.51 g aniline and 2.03g 5-sulfonic group Whitfield's ointment and after being uniformly mixed in this suspension, then mixture is moved in ice-water bath, vigorous stirring also makes mixture temperature be down to 5 ~ 10 DEG C.
3) aniline polymerization: add the polyreaction that 3.978 g benzoyl peroxides cause aniline in the mixtures of above-mentioned 5 ~ 10 DEG C, and allow mixture naturally heat up, react 24 hours.
4) separation and purification product: the mixture after having reacted is filtered, by filter cake absolute ethanol washing, then composite shape-setting phase-change heat-storage material is dried and obtained to filter cake in 60 DEG C.
5) heat accumulation and thermal conductivity test result: start-up phase temperature is 181.4 DEG C, phase transformation peak temperature is 187.5 DEG C, and latent heat of phase change is 214.8J/g, thermal conductivity 0.429 W/mK.
6) stability test: material tabletting machine is made a right cylinder at the pressure of 1MPa, puts into the thermostat container of 200 DEG C, observes cylindrical shape and does not change and do not have liquid remittance to leak after 12 hours.
Claims (4)
1. a preparation method for composite shape-setting phase-change heat-storage material, is characterized in that detailed process is: first a certain amount of metal nanometer line is mixed also supersound process with dehydrated alcohol and within 20 ~ 60 minutes, obtain metal nanometer line/dehydrated alcohol mixed solution; Add a certain amount of sugar alcohol, tensio-active agent and a certain amount of dehydrated alcohol again, and sugar alcohol and tensio-active agent are all dissolved mixture stirring and refluxing at 50 ~ 75 DEG C; With vigorous stirring solution is down to room temperature and obtains suspension; Aniline and organic acid is added and after being uniformly mixed in this suspension, mixture temperature is down to 5 ~ 20 DEG C, then add benzoyl peroxide and cause the polyreaction of aniline, react after 20 ~ 30 hours through filtration, organic solvent washing drying obtains composite shape-setting phase-change heat-storage material.
2. shine the preparation method of composite shape-setting phase-change heat-storage material according to claim 1 by it, it is characterized in that, in preparation-obtained composite shape-setting phase-change heat-storage material, polyaniline is propping material, sugar alcohol is phase-change heat-storage material, and metal nanometer line is heat conductive filler; When temperature is higher than contained by composite shape-setting phase-change heat-storage material during sugar alcohol fusing point, this composite shape-setting phase-change heat-storage material outward appearance is still in solid-state and dimensionally stable; This composite shape-setting phase-change heat-storage material heat conductivility is moderate, can be used as the heat accumulating of passive type thermal protection system.
3., according to the preparation method of composite shape-setting phase-change heat-storage material according to claim 1, it is characterized in that: described sugar alcohol be Xylitol, Sorbitol Powder, erythritol, maltose alcohol, N.F,USP MANNITOL and sweet and pure in one; Described metal nanometer line is the one of copper nano-wire and nano silver wire; Described tensio-active agent is the one in Macrogol 4000, polyethylene glycol 6000, PEG 8000, PEG20000 and PEG 20000; Organic solvent used during described organic solvent washing is the one of dehydrated alcohol or acetone, and described organic acid is the one of p-methyl benzenesulfonic acid and 5-sulphosalicylic acid.
4. according to the preparation method of composite shape-setting phase-change heat-storage material according to claim 1, it is characterized in that: the consumption of described sugar alcohol is 70 ~ 85% of sugar alcohol and aniline quality sum, in the described stable suspension obtained, the content of sugar alcohol is 16.7 ~ 25.0 g/L, the amount of the described a certain amount of dehydrated alcohol added is 1 ~ 2.33 times of the volume of dehydrated alcohol used in described metal nanometer line/dehydrated alcohol mixed solution, the consumption of described nano silver wire is 5 ~ 67% of sugar alcohol used and aniline quality sum, in described metal nanometer line/dehydrated alcohol mixed solution, the content of metal nanometer line is 3 ~ 42 g/L, described dosage of surfactant is 35 ~ 60% of sugar alcohol quality used, , described organic acid consumption is that after making it be dissolved in suspension, its concentration is 0.068 ~ 0.18mol/L, described benzoyl peroxide consumption is 2 ~ 3.5 times of the amount of substance of aniline used.
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| CN107446554A (en) * | 2017-09-22 | 2017-12-08 | 浙江海洋大学 | A kind of preparation method of wide transition temperature area shaping phase-change material |
| CN109370538A (en) * | 2018-11-26 | 2019-02-22 | 浙江大学 | A kind of phase change cold accumulating agent fresh-keeping for Pleurotus eryngii and preparation method thereof |
| CN114539980A (en) * | 2020-11-27 | 2022-05-27 | 中国科学院大连化学物理研究所 | Phase-change material capable of storing energy at room temperature for long time and preparation and application thereof |
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| CN102888211A (en) * | 2012-09-24 | 2013-01-23 | 长沙理工大学 | Composite shape-stabilized phase change material and preparation method thereof |
| CN103146351A (en) * | 2013-03-20 | 2013-06-12 | 长沙理工大学 | Shaped phase-change material with high heat-conducting property and preparation method thereof |
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2015
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| CN102827584A (en) * | 2012-08-31 | 2012-12-19 | 河南科技大学 | High-phase-change thermoset phase change material and preparation method thereof |
| CN102888211A (en) * | 2012-09-24 | 2013-01-23 | 长沙理工大学 | Composite shape-stabilized phase change material and preparation method thereof |
| CN103146351A (en) * | 2013-03-20 | 2013-06-12 | 长沙理工大学 | Shaped phase-change material with high heat-conducting property and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105331334A (en) * | 2015-10-19 | 2016-02-17 | 哈尔滨工业大学 | Preparation method of short carbon fiber/meso-erythritol phase change composite material |
| CN107446554A (en) * | 2017-09-22 | 2017-12-08 | 浙江海洋大学 | A kind of preparation method of wide transition temperature area shaping phase-change material |
| CN109370538A (en) * | 2018-11-26 | 2019-02-22 | 浙江大学 | A kind of phase change cold accumulating agent fresh-keeping for Pleurotus eryngii and preparation method thereof |
| CN114539980A (en) * | 2020-11-27 | 2022-05-27 | 中国科学院大连化学物理研究所 | Phase-change material capable of storing energy at room temperature for long time and preparation and application thereof |
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