CN103773321A - Amide gelator composite shape-stabilized phase change material and preparation method thereof - Google Patents
Amide gelator composite shape-stabilized phase change material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an amide gelator composite shape-stabilized phase change material and a preparation method thereof. The composite shape-stabilized phase change material comprises the following components in percentage by mass: 85-99.5% of a phase change material and 0.5-15% of organic gelators. According to the invention, the shape-stabilized phase change material with high enthalpy of phase change, low preparation cost, simple preparation process and favorable application performance can be obtained by taking a solid-liquid phase change material as a working substance and a spatial network structure formed by self-assembling small organic molecular amide gelators as a supporting material.
Description
Technical field
The present invention relates to a kind of shaping phase-change material and preparation method thereof, be specifically related to a kind of amides gelator composite shape-setting phase-change material and preparation method thereof.
Background technology
In recent years, it is found that some small molecules organic compound can (even lower than 1wt%) make most of organic solvent gelations under very low concentration, the material that makes the similar memory fluid of whole System forming or solid, is called molecular gel or organogel.This micromolecular organic compound is called as Gelator (being translated into temporarily gelator).Prepare organic gel method easy: by gelator heating for dissolving in organic solvent, be cooled to room temperature, ordered structure is spontaneously assembled, is assembled into gelator in process of cooling again, forms three-dimensional network system, thereby reach the constraint effect to solvent, and this process is hot reversing process.Mainly concentrate at present the gelation of ordinary organic solvents for the research of gelator, and it is rare that gelator is applied to report in phase change material.
Phase change material (PCMs) is to utilize the heat absorption and release of material in phase transition process to carry out storage and the release of heat energy, thereby can realize the material of temperature adjusting.The application of phase change material aspect peak load shifting, novel energy-saving construction timber, waste heat recovery and the air-conditioning technical of sun power utilization, aerospace, thermal load is more and more extensive, and the phase change material that cost of development is cheap, thermo-efficiency is high is the main direction of following energy-saving material development.
From present application prevalence, what phase-change heat-storage material mainly used is solid-liquid phase change heat accumulating and solid-solid phase change heat accumulating.Solid-liquid phase change material major advantage is cheap and easy to get, but solid-liquid phase change heat accumulating existed cold-peace phenomenon of phase separation, can cause thermal storage performance to worsen, and easily produces the shortcomings such as leakage, contaminate environment, corrosives, packaging container price height.The crystalline network of solid-solid phase change material solid before and after undergoing phase transition changes and heat release heat absorption, and compared with solid-liquid phase change material, solid-solid phase change material has more advantages: directly machine-shaping, does not need container to hold; The solid-solid phase change material coefficient of expansion is less, does not have cold-peace phenomenon of phase separation, and toxicity corrodibility is little, without leakage problem; Composition is stable simultaneously, and Polyurethane is good, long service life, and device is simple.But solid-solid phase change material also exists latent heat of phase change lower, the shortcoming that price is higher.The relative merits of comprehensive solid-liquid phase change material and solid-solid phase change material, there is the solid-liquid phase change material of a large class dimensionally stable, it is made up of two portions: the one, and operation material, utilizes its solid-liquid phase change behavior to carry out energy storage, and conventional is mainly organic phase change material.Another is carrier matrix, and it plays coated and structural framework, will wrap in unbodied solid-liquid phase change composition constraint on the one hand, prevents from flowing, and can keep on the other hand solid shape and the workability of material.
The Li Min of Southeast China University (CN103059817A) mixes organic phase changing matter and solidifying agent and generates prepolymer under molten state, prepolymer cast is entered in the large pore material holes such as porous graphite, higher than solidifying and obtain composite shape-setting phase-change material under the condition of raw material transformation temperature.In its formula, the content of organic phase changing matter is 50-85wt%, and the content of carrier matrix should be 50～15wt% mutually.The Sun Li of Dalian Inst of Chemicophysics, Chinese Academy of Sciences virtuous (CN102977858A) is take lipid acid mixed acid system as phase change material, expanded graphite is carrier, in the time that expanded graphite accounts for composite phase-change material 10wt%, the transformation temperature of this composite phase-change heat-storage material is 19.6 ℃, latent heat of phase change is 145.5kJ/kg, and thermal conductivity is 0.723Wm
-1k
-1, after further formalizing with composite paint, the transformation temperature of matrix material is 18.6 ℃, latent heat of phase change is 92.4kJ/kg.
The red grade of the Guo Jun of Lanzhou University of Science & Technology (CN102417812A) is prepared phase-change microcapsule with the coated tetradecanol of carbamide prepolymer, wherein tetradecanol quality of the emulsion mark 60～70%, carbamide prepolymer massfraction 30～40%.Donghua University in big east (CN1695788A) take vinyl and bi-vinyl class monomer be outer cover polymer source, take oil soluble phase change material as core, adopt emulsion polymerization to prepare microcapsules of storing energy through phase change, wherein phase change material mass percent is 10～30%.Phase change material percentage composition is low, directly causes the enthalpy of phase change of microencapsulated phase change material little.
(Solar Energy Materials and Solar Cells, 2000,64 (1): 37) with two roller mills, paraffin and polyethylene blend are prepared to shaping phase-change material, Quality of Paraffin Waxes content is 75% such as the Ye Hong of Chinese University of Science and Technology.The Xiao Min of South China Science & Engineering University etc. (solar energy journal, 2001,22 (4): P427) are by 56～58 ℃ of paraffin of fusing point and thermoplastic elastomer composition composite phase-change material, and the massfraction of paraffin is 20～80%.
The Wang Jia of Hebei University of Technology happiness (CN102504092A) is incorporated into the lipid acid or the fatty alcohol that there are phase transition performance on high reaction activity (methyl) vinylformic acid, the polymerisable ester obtaining, as phase change portion, utilizes free-radical polymerized method to prepare the quaternary ammonium salt of (methyl) acrylic polymer, (methyl) esters of acrylic acid-(methyl) acrylic acid polymkeric substance and (methyl) esters of acrylic acid-(methyl) acrylic copolymer.The macromolecular solid solid phase transition energy storage material transformation temperature obtaining is 29～52 ℃, and enthalpy of phase change can reach 96kJ/kg.
The Ha Lidan of Xinjiang University buys and carries (CN102321452A) take lauric acid cellulose ester and polyoxyethylene glycol as major ingredient, under linking agent exists, through the synthesizing cross-linked type polyoxyethylene glycol/lauric acid of solution graft copolymerization polymerization cellulose ester phase-changing energy storage material.Resulting materials transformation temperature is between 19～60 ℃, and enthalpy of phase change can reach 194.7J/g.But adopt the method to prepare phase change material, complex process, relates to the problems such as solvent recuperation.
The Guo Yuan of Guangzhou Inst of Chemistry, Chinese Academy of Sciences waits by force (Macromolecules1995,28:6551-6555; Journal of Macromolecular Science, Part B:Physics.1995,34 (3): 239-248; Journal of Macromolecular Science, Part B:Physics.1999,38 (4): 449-459.) PEG of different molecular weight and Mierocrystalline cellulose, derivatived cellulose, chitosan etc. are prepared to compound PEG solid phase change material with solution blending after dissolution with solvents.When the propping material mass ratioes such as Mierocrystalline cellulose, derivatived cellulose, chitosan in blend are higher than 15% time, blend just shows solid-state phase changes behavior.Guo Yuanqiang, beam sea of learning patent (CN1165174A; CN1261095A) the polarity polymer that is 100～3000 by solution blending or melt-blending process by the polymerization degree that contains hydroxyl, amino, carboxyl, carbonyl, acyl group and molecular weight are 140～200000 crystallinity or thermal plastic high polymer and the compound solid-solid phase change material of preparing of organic acid.The general 150J/g that is up on the low side of this material phase transformation enthalpy.
(the CN1247216A such as the Jiang Yong of Guangzhou Inst of Chemistry, Chinese Academy of Sciences; CN1247217A; CN1616588A; CN1710012A) polyoxyethylene glycol, linking agent and the high-molecular bone frame material composition solid-solid phase-change energy-storage material that contain active group with one or both ends.Selected high-molecular bone frame material comprises the synthetic polymers such as the natural polymers such as Mierocrystalline cellulose, nano-cellulose and polyolefine.Its enthalpy of phase change size because being subject to contained hydroxy number on framework material molecule, limits the polyoxyethylene glycol number in grafting, therefore also will be restricted.
In the shaping phase-change material preparation of having reported, higher as the quality percentage composition of the carrier matrix of propping material, the quality percentage composition of phase transformation operation material is on the low side, must cause the reduction of enthalpy of phase change; And the complicated preparation technology such as grafting, blend or micro encapsulation who generally adopts also improves the phase change material cost that makes preparation relatively.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, develop a kind of high enthalpy of phase change, low preparation cost, preparation technology is simple, and what application performance was good has gelator Supramolecular Network structure as the shaping phase-change material supporting.
For realizing object of the present invention, total inventive concept is: the amides organogel factor is joined in phase change material, heated and stirred is to completely dissolving and make transparent mixture, pour in mould, in natural cooling process, the organogel factor is self-assembled into Supramolecular Network structure by non covalent bond effect, phase change material is formed to constraint effect, make phase change material not present liquid-flow character in the above macroscopic view of transformation temperature, thereby make shaping phase-change material.
The present invention realizes in the following way:
A kind of amides gelator composite shape-setting phase-change material, the mass percent of its component is: phase change material 85～99.5%, the organogel factor 0.5～15%.
Described phase change material preferred content is 90～99%, and organogel factor preferred content is 1～10%.
Described phase change material is selected from: the mixture of one or more in high fatty alcohol, polyoxyethylene glycol, polyethylene or polypropylene that alkane paraffin, ceresine or the beeswax that carbonatoms is 18～600, the higher fatty acid that carbonatoms is 8～30 or fatty acid ester, carbonatoms are 8～30.
Described phase change material is preferably one or more the mixture in whiteruss, solid paraffin, Octadecane, stearyl alcohol, hexadecanol, tetradecyl alcohol, lauryl alcohol, nonylcarbinol, stearic acid, butyl stearate, Vinlub, palmitinic acid, tetradecanoic acid, lauric acid, capric acid, polyoxyethylene glycol, polyethylene or polypropylene.
The described organogel factor is amides organic micromolecule gel factor, and its chemical structural formula is:
In formula, R is
Wherein n=6～18, m=2～10;
In formula, X is selected from:
Wherein, n=2～10.
A kind of preparation method of amides gelator composite shape-setting phase-change material:
(1) take by mass percentage phase change material 85～99.5%, the organogel factor 0.5～15%;
(2) the described organogel factor is joined in described phase change material, heated and stirred is to completely dissolving and make transparent mixture;
(3) described transparent mixture naturally cooling is obtained to composite shape-setting phase-change material.
The present invention is take solid-liquid phase change material as operation material, adopt the spacial framework of amides organic micromolecule gel factor self-assembly formation as the propping material of phase change material, can obtain high enthalpy of phase change, low preparation cost, preparation technology is simple, the shaping phase-change material that application performance is good.
Accompanying drawing explanation
Fig. 1 is sizing phase-change material Photomicrograph under the above natural light of transformation temperature prepared by the embodiment of the present invention 1.
Fig. 2 is sizing phase-change material Photomicrograph under the above natural light of transformation temperature prepared by the embodiment of the present invention 2.
Embodiment
Gelator composite phase-change energy storage material enthalpy of phase change testing method: adopting the DSC-Q10 of PE company differential scanning calorimeter (DSC) Range of measuring temp is 0 ℃～100 ℃; nitrogen atmosphere protection; temperature rise rate: 10 ℃/min, rate of temperature fall: 5 ℃/min.
Gelator composite phase-change energy storage material self-assembly performance testing method: use the microscopic examination with hot platform and take pictures.More than phase change material is risen to transformation temperature with the temperature rise rate of 1 ℃/min by room temperature, the pattern to phase change material more than transformation temperature carries out Taking Pictures recording.
Gel solution forms temperature (TD) and gel-sol temperature (TGS) test adopts test tube gradient method: the test tube bottom that phase change gel material is housed is inserted in transparent oil bath down, then oil bath is heated up with the speed of 2 ℃/min.In the time being warmed up to certain temperature, test tube is tilted, if gel can flow just, determine that this temperature is that gel aggregate structure solution is formed temperature (TD).When occurring the follow-up temperature of continuing rising of TD, and temperature when gel is all dissolved as to liquid is defined as gel-sol phase transition temperature (TGS).
List gelator structure selected in specific examples with table 1 below
Table 1 partial gel factor structure formula
To contribute to understand the present invention by following instance, but not limit content of the present invention.
Embodiment 1
The solid paraffin 4g that to get fusing point and be 56-58 ℃, enthalpy of phase change be 189.3J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 184.6J/g through differential scanning calorimeter (DSC), and transformation temperature is 58.34 ℃, and it is 130 ℃ that the gel solution of the phase change gel of phase change gel is formed temperature, and gel-sol temperature is 150 ℃.
More than the solid paraffin that does not add gelator is warming up to transformation temperature, system is mobile transparent liquid shape; And observe from Fig. 1, add the solid paraffin of gelator, after being warming up to more than transformation temperature, system does not present uniform transparent liquid state, but has intermeshing fibrillar meshwork structure.This is that gelator is self-assembled into intermeshing space reticulated structure by non covalent bond in phase transformation system, thereby phase change material is played to the effect of constraint setting, makes not present in its macroscopic view the mobility of liquid.
Embodiment 2
The solid paraffin 4g that to get fusing point and be 56-58 ℃, enthalpy of phase change be 189.3J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-12, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 184.2J/g through differential scanning calorimeter (DSC), and transformation temperature is 58.47 ℃, and it is 102 ℃ that the gel solution of the phase change gel of phase change gel is formed temperature, and gel-sol temperature is 140 ℃.
More than the PEG-6000 that does not add gelator is warming up to transformation temperature, system is mobile transparent liquid shape; And observe from Fig. 2, add the PEG-6000 of gelator, more than being warming up to transformation temperature, system does not present uniform transparent liquid state, but there is intermeshing fibrillar meshwork structure, illustrate that gelator also can be self-assembled into intermeshing space reticulated structure by non covalent bond in PEG-6000, thereby phase change material is played to the effect of constraint setting, make not present in its macroscopic view the mobility of liquid.
Embodiment 3
The solid paraffin 4g that to get fusing point and be 56-58 ℃, enthalpy of phase change be 189.3J/g melts in 25mm × 40mm sample bottle, adds gelator G
2-18, making it mass percent is 6%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 180.3J/g through differential scanning calorimeter (DSC), and transformation temperature is 59.35 ℃, and it is 70 ℃ that the gel solution of the phase change gel of phase change gel is formed temperature, and gel-sol temperature is 86 ℃.
Embodiment 4
The solid paraffin 4g that to get fusing point and be 56-58 ℃, enthalpy of phase change be 189.3J/g melts in 25mm × 40mm sample bottle, adds gelator G
2-12, making it mass percent is 6%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 182.5J/g through differential scanning calorimeter (DSC), and transformation temperature is 58.99 ℃, and it is 132 ℃ that the gel solution of the phase change gel of phase change gel is formed temperature, and gel-sol temperature is 138 ℃.
Embodiment 5
The PEG-100004g that to get fusing point and be 63-65 ℃, enthalpy of phase change be 176.2J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 171.8J/g through differential scanning calorimeter (DSC), and transformation temperature is 64.53 ℃, and it is 140 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 148 ℃.
Embodiment 6
The PEG-6000 4g that to get fusing point and be 65-67 ℃, enthalpy of phase change be 169.7J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 166.4J/g through differential scanning calorimeter (DSC), and transformation temperature is 69.07 ℃, and it is 140 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 148 ℃.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 162.4J/g through differential scanning calorimeter (DSC), and transformation temperature is 71.77 ℃, and it is 140 ℃ that gel solution is formed temperature.
Embodiment 7
The PEG-60004g that to get fusing point and be 65-67 ℃, enthalpy of phase change be 169.7J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-12, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 164.6J/g through differential scanning calorimeter (DSC), and transformation temperature is 66.9 ℃, and it is 124 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 126 ℃.
Embodiment 8
The PEG-60004g that to get fusing point and be 65-67 ℃, enthalpy of phase change be 169.7J/g melts in 25mm × 40mm sample bottle, adds gelator G
2-18, making it mass percent is 5%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 165.2J/g through differential scanning calorimeter (DSC), and transformation temperature is 70.3 ℃, and it is 130 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 138 ℃.
Embodiment 9
The PEG-60004g that to get fusing point and be 65-67 ℃, enthalpy of phase change be 169.7J/g melts in 25mm × 40mm sample bottle, adds gelator G
2-12, making it mass percent is 5%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 161J/g through differential scanning calorimeter (DSC), and transformation temperature is 65.83 ℃, and it is 112 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 120 ℃.
Embodiment 10
The PEG-20004g that to get fusing point and be 63-66 ℃, enthalpy of phase change be 166.6J/g melts in 25mm × 40mm sample bottle, adds gelator G
2, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 159.4J/g through differential scanning calorimeter (DSC), and transformation temperature is 66.79 ℃, and it is 140 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 144 ℃.
Embodiment 11
The PEG-10004g that to get fusing point and be 37-40 ℃, enthalpy of phase change be 148.1J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 144.8J/g through differential scanning calorimeter (DSC), and transformation temperature is 51 ℃, and it is 124 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 143 ℃.
Embodiment 12
The stearic acid 4g that to get fusing point and be 62 ℃, enthalpy of phase change be 186.4J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 175.9J/g through differential scanning calorimeter (DSC), and transformation temperature is 59.5 ℃, and it is 110 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 114 ℃.
Embodiment 13
The stearic acid 4g that to get fusing point and be 62 ℃, enthalpy of phase change be 186.4J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-12, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 180.9J/g through differential scanning calorimeter (DSC), and transformation temperature is 58.08 ℃, and it is 82 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 120 ℃.
Embodiment 14
The 177.14g that to get fusing point and be 62-64 ℃, enthalpy of phase change be 272.7J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 173.6J/g through differential scanning calorimeter (DSC), and transformation temperature is 68.27 ℃, and it is 100 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 110 ℃.
Embodiment 15
The tetradecanoic acid 4g that to get fusing point and be 52.5-54.5 ℃, enthalpy of phase change be 192.7J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 183.5J/g through differential scanning calorimeter (DSC), and transformation temperature is 58.2 ℃, and it is 82 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 114 ℃.
Embodiment 16
The lauric acid 4g that to get fusing point and be 41-48 ℃, enthalpy of phase change be 177.6J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 162.2J/g through differential scanning calorimeter (DSC), and transformation temperature is 47.89 ℃, and it is 76 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 102 ℃.
Embodiment 17
The stearyl alcohol 4g that to get fusing point and be 56-58 ℃, enthalpy of phase change be 215.6J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 201.1J/g through differential scanning calorimeter (DSC), and transformation temperature is 62.06 ℃, and it is 76 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 108 ℃.
Embodiment 18
The stearyl alcohol 4g that to get fusing point and be 56-58 ℃, enthalpy of phase change be 215.6J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-12, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 205.5J/g through differential scanning calorimeter (DSC), and transformation temperature is 61.06 ℃, and it is 74 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 110 ℃.
Embodiment 19
The hexadecanol 4g that to get fusing point and be 46-50 ℃, enthalpy of phase change be 191.4J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 176.4J/g through differential scanning calorimeter (DSC), and transformation temperature is 51.64 ℃, and it is 76 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 96 ℃.
Embodiment 20
The tetradecyl alcohol 4g that to get fusing point and be 38 ℃, enthalpy of phase change be 197J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 187.2J/g through differential scanning calorimeter (DSC), and transformation temperature is 36.07 ℃, and it is 72 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 102 ℃.
Embodiment 21
The lauryl alcohol 4g that to get fusing point and be 19-25 ℃, enthalpy of phase change be 186.9J/g melts in 25mm × 40mm sample bottle, adds gelator G
1-18, making it mass percent is 3%, and heated and stirred is to dissolving completely, and after thing clarification to be mixed, naturally cooling makes gelator composite shape-setting phase-change material.
The shaping phase-change material of the present embodiment gained is tested enthalpy of phase change 171.5J/g through differential scanning calorimeter (DSC), and transformation temperature is 23.12 ℃, and it is 74 ℃ that the gel solution of phase change gel is formed temperature, and gel-sol temperature is 98 ℃.
Claims (6)
1. an amides gelator composite shape-setting phase-change material, the mass percent of its component is: phase change material 85～99.5%, the organogel factor 0.5～15%.
2. a kind of amides gelator composite shape-setting phase-change material according to claim 1, is characterized in that described phase change material preferred content is 90～99%, and organogel factor preferred content is 1～10%.
3. a kind of amides gelator composite shape-setting phase-change material according to claim 1 and 2, is characterized in that described phase change material is selected from: the mixture of one or more in high fatty alcohol, polyoxyethylene glycol, polyethylene or polypropylene that alkane paraffin, ceresine or the beeswax that carbonatoms is 18～600, the higher fatty acid that carbonatoms is 8～30 or fatty acid ester, carbonatoms are 8～30.
4. a kind of amides gelator composite shape-setting phase-change material according to claim 1 and 2, is characterized in that described phase change material is preferably one or more the mixture in whiteruss, solid paraffin, Octadecane, stearyl alcohol, hexadecanol, tetradecyl alcohol, lauryl alcohol, nonylcarbinol, stearic acid, butyl stearate, Vinlub, palmitinic acid, tetradecanoic acid, lauric acid, capric acid, polyoxyethylene glycol, polyethylene or polypropylene.
5. a kind of amides gelator composite shape-setting phase-change material according to claim 1 and 2, is characterized in that the described organogel factor is amides organic micromolecule gel factor, and its chemical structural formula is:
In formula, R is
Wherein n=6～18, m=2～10;
In formula, X is selected from:
Wherein, n=2～10.
6. the preparation method of an amides gelator composite shape-setting phase-change material:
(1) take by mass percentage phase change material 85～99.5%, the organogel factor 0.5～15%;
(2) the described organogel factor is joined in described phase change material, heated and stirred is to completely dissolving and make transparent mixture;
(3) described transparent mixture naturally cooling is obtained to composite shape-setting phase-change material.
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