CN104371658A - Packaging shape-stabilizing method of inorganic hydrated salt phase-change heat storage material - Google Patents

Packaging shape-stabilizing method of inorganic hydrated salt phase-change heat storage material Download PDF

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Publication number
CN104371658A
CN104371658A CN201410590865.8A CN201410590865A CN104371658A CN 104371658 A CN104371658 A CN 104371658A CN 201410590865 A CN201410590865 A CN 201410590865A CN 104371658 A CN104371658 A CN 104371658A
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salt phase
phase transition
hydrous salt
inorganic hydrous
transition material
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孙立贤
陈娇
张焕芝
徐芬
陈培海
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Guilin University of Electronic Technology
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Guilin University of Electronic Technology
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
    • C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The invention provides a packaging shape-stabilizing method of an inorganic hydrated salt phase-change heat storage material, which comprises the following steps: (1) adding a nucleator and deionized water into the inorganic hydrated salt phase-change material, and heating until the inorganic hydrated salt phase-change material achieves the molten state; (2) adding a porous propping material into the molten-state inorganic hydrated salt phase-change material, and stirring sufficiently and uniformly; (3) putting the molten-state mixture obtained in the step (2) in a vacuum environment to enhance the adsorptivity of the porous propping material for the inorganic hydrated salt phase-change material; and (4) moving the molten-state mixture out of the vacuum environment, and immediately putting the molten-state mixture into a low-temperature environment suitable for crystallization to perform recrystallization. The composite shape-stabilized phase-change material obtained by the method has the advantages of stable structure, high latent heat, no toxicity, simple preparation process, short time consumption and low cost.

Description

A kind of encapsulation setting process of inorganic hydrous salt phase transition heat accumulating
Technical field
The present invention relates to materials science field, be specifically related to a kind of encapsulation setting process of inorganic hydrous salt phase transition heat accumulating.
Background technology
Phase change material has the advantages such as storage density is large, heat vessel volume is little, heat accumulation efficiency is high, transformation temperature is constant and can be recycled, and has a wide range of applications in the field such as peak load shifting, used heat/heat recovery of storage of solar energy, air conditioner energy saving, building energy conservation, electric power.Inorganic hydrated salt, as a kind of important normal low-temperature phase-change energy-storing material, has fixing transformation temperature, higher latent heat of phase change, good thermal conductivity and the features such as low price.But this solid-can there is solid-liquid change at phase transition process, the defect of there is liquid fluidity, easily leaking, and there is certain excessively cold, phenomenon of phase separation in liquid phase change material, therefore, limit its widespread use in productive life.
At present, the method solving phase change material leakage problem mainly contains porous material absorption method and microcapsule coated method.As described the method obtaining stephanoporate composite inorganic phase-changing material in Chinese patent 200810048159.5.In addition, describe a kind of inorganic hydrous salt phase transition accumulation energy microcapsule and preparation method thereof in Chinese patent 201210136116, this microcapsule method effectively can solve the mistake cold-peace problem of phase separation of hydrous salt phase change material.Although aforesaid method all solves the leakage problem of phase change material, preparation process spent time is longer, and there is thorough, the not uneven problem of absorption.
Summary of the invention
In order to improve the energy storage stability of composite shape-setting phase-change material, prevent from occurring in phase transition process to leak and improve the heat conductivility of phase change material, the invention provides a kind of encapsulation setting process of inorganic hydrous salt phase transition heat accumulating, the mode of adding nucleator is adopted to reduce the condensate depression of inorganic hydrated salt, utilize the capillary absorption performance of porous material to solve its easy leakage problem simultaneously, and adopt vacuum impregnation technology to strengthen absorption, thus improve its over-all properties.The composite shape-setting phase-change material utilizing the present invention to obtain has Stability Analysis of Structures, latent heat is larger, nontoxic, and preparation process is simple, consuming time short, with low cost.
An encapsulation setting process for inorganic hydrous salt phase transition heat accumulating, described method comprises the steps:
(1) in inorganic hydrous salt phase transition material, add nucleator and deionized water and heat, making inorganic hydrous salt phase transition material reach molten state; (2) porous support materials is joined in the inorganic hydrous salt phase transition material of molten state, stir; (3) the molten state mixture that step (2) obtains is placed under vacuum environment to strengthen the absorption of porous support materials to inorganic hydrous salt phase transition material; (4) molten state mixture is shifted out from vacuum environment, under being placed in the low temperature environment of applicable crystallization immediately, carry out recrystallization.Wherein, in the mixture be made up of inorganic hydrous salt phase transition material, nucleator and porous support materials, inorganic hydrous salt phase transition material proportion is 52-70wt ﹪, and nucleator proportion is 1-2wt ﹪, porous support materials proportion is 28-47wt ﹪, and three's summation is 100 ﹪.
Described inorganic hydrous salt phase transition material is Na 2sO 410H 2o, CaCl 26H 2o, KF2H 2o, KF4H 2o, MgCl 24H 2o, Mg (NO 3) 26H 2o, MgSO 47H 2o, Na 2hPO 412H 2o, Na 2cO 310H 2o, CH 3cOONa3H 2o, LiNO33H 2o, LiClO 33H 2one or two or more kinds in O.
Described nucleator is one or two or more kinds in borax, six water strontium chlorides, magnesium chloride hexahydrate, barium carbonate.
Described porous support materials is pearlstone, expanded graphite, expanded vermiculite, porous alumina or porous activated carbon.
Accompanying drawing explanation
Fig. 1 a, Fig. 1 b, Fig. 1 c, Fig. 1 d are CaCl 26H 2the SEM photo of O porous alumina composite phase-change material;
Fig. 2 a, Fig. 2 b, Fig. 2 c, Fig. 2 d are CaCl 26H 2the DSC curve of O porous alumina composite phase-change material.
Embodiment
The present invention is described in further detail to utilize embodiment below.
Embodiment 1:
(1) 2g CaCl is got 26H 2o, is placed in beaker, adds the borax of 0.06, mixes, and supplements a small amount of deionized water, seals, be placed in 50 DEG C of thermostatic drying chambers, heat 5 min, make it reach molten state with preservative film; (2) 1.0 porous Al are got 2o 3join and molten state CaCl is housed 26H 2in the beaker of O, and stir, the beaker of above-mentioned sample is put into vacuum drying oven, vacuumizes 2h, then put into refrigerator 5h and carry out recrystallization, namely obtain adsorbing uniform novel C aCl 26H 2o porous Al 2o 3composite phase-change material; (3) transformation temperature of gained composite shape-setting phase-change heat-storage material is 30.71 DEG C, and latent heat of phase change value is 99.81 J/g; The SEM photo of this embodiment and DSC test result are respectively as shown in Fig. 1 a, Fig. 2 a.
Embodiment 2:
(1) 2g CaCl is got 26H 2o, is placed in beaker, adds the borax of 0.06, mixes, and supplements a small amount of deionized water, seals, be placed in 50 DEG C of thermostatic drying chambers, heat 5 min, make it reach molten state with preservative film; (2) 1.2 porous Al are got 2o 3join and molten state CaCl is housed 26H 2in the beaker of O, and stir, the beaker of above-mentioned sample is put into vacuum drying oven, vacuumizes 2h, then put into refrigerator 5h and carry out recrystallization, namely obtain adsorbing uniform novel C aCl 26H 2o porous Al 2o 3composite phase-change material; (3) transformation temperature of gained composite shape-setting phase-change heat-storage material is 29.95 DEG C, and latent heat of phase change value is 86.42 J/g; The SEM photo of this embodiment and DSC test result are respectively as shown in Fig. 1 b, Fig. 2 b.
Embodiment 3:
(1) 2g CaCl is got 26H 2o, is placed in beaker, adds the borax of 0.06, mixes, and supplement a small amount of deionized water, rear preservative film is sealed, and is placed in 50 DEG C of thermostatic drying chambers, heats 5 min, make it reach molten state; (2) 1.4 porous Al are got 2o 3join and molten state CaCl is housed 26H 2in the beaker of O, and stir, the beaker of above-mentioned sample is put into vacuum drying oven, vacuumizes 2h, then put into refrigerator 5h and carry out recrystallization, namely obtain adsorbing uniform novel C aCl 26H 2o porous Al 2o 3composite phase-change material; (3) transformation temperature of gained composite shape-setting phase-change heat-storage material is 28.34 DEG C, and latent heat of phase change value is 70.61J/; The SEM photo of this embodiment and DSC test result are respectively as shown in Fig. 1 c, Fig. 2 c.
Embodiment 4:
(1) 2g CaCl is got 26H 2o, is placed in beaker, adds the borax of 0.06, mixes, and supplement a small amount of deionized water, rear preservative film is sealed, and is placed in 50 DEG C of thermostatic drying chambers, heats 5 min, make it reach molten state; (2) 1.6 porous Al are got 2o 3join and molten state CaCl is housed 26H 2in the beaker of O, and stir, the beaker of above-mentioned sample is put into vacuum drying oven, vacuumizes 2h, then put into refrigerator 5h and carry out recrystallization, namely obtain adsorbing uniform novel C aCl 26H 2o porous Al 2o 3composite phase-change material; (3) transformation temperature of gained composite shape-setting phase-change heat-storage material is 27.71 DEG C, and latent heat of phase change value is 60.58J/g; The SEM photo of this embodiment and DSC test result are respectively as shown in Fig. 1 d, Fig. 2 d.
Below only list with CaCl 26H 2o is as phase change material, using borax as nucleator, with porous Al 2o 3as the embodiment of propping material, in fact can realize the present invention with the phase change material enumerated in summary of the invention, nucleator, propping material, and corresponding effect can be obtained.

Claims (7)

1. an encapsulation setting process for inorganic hydrous salt phase transition heat accumulating, described method comprises the steps:
(1) in inorganic hydrous salt phase transition material, add nucleator and deionized water and heat, making inorganic hydrous salt phase transition material reach molten state;
(2) porous support materials is joined in the inorganic hydrous salt phase transition material of molten state, stir;
(3) the molten state mixture that step (2) obtains is placed under vacuum environment to strengthen the absorption of porous support materials to inorganic hydrous salt phase transition material;
(4) molten state mixture is shifted out from vacuum environment, under being placed in the low temperature environment of applicable crystallization immediately, carry out recrystallization.
2. method according to claim 1, wherein said inorganic hydrous salt phase transition material is Na 2sO 410H 2o, CaCl 26H 2o, KF2H 2o, KF4H 2o, MgCl 24H 2o, Mg (NO 3) 26H 2o, MgSO 47H 2o, Na 2hPO 412H 2o, Na 2cO 310H 2o, CH 3cOONa3H 2o, LiNO33H 2o, LiClO 33H 2one or two or more kinds in O.
3. method according to claim 1, wherein said nucleator is one or two or more kinds in borax, six water strontium chlorides, magnesium chloride hexahydrate, barium carbonate.
4. method according to claim 1, wherein said porous support materials is pearlstone, expanded graphite, expanded vermiculite, porous alumina or porous activated carbon.
5. method according to claim 1, wherein, in the mixture be made up of inorganic hydrous salt phase transition material, nucleator and porous support materials, inorganic hydrous salt phase transition material proportion is 52-70wt ﹪, nucleator proportion is 1-2wt ﹪, porous support materials proportion is 28-47wt ﹪, and three's summation is 100 ﹪.
6. the method according to any one in claim 1-5, is wherein saidly at least 2 hours by the molten state mixture time be placed under vacuum environment.
7. the method according to any one in claim 1-5, wherein said be placed in the low temperature environment of applicable crystallization under carry out recrystallization time be at least 5 hours.
CN201410590865.8A 2014-10-29 2014-10-29 Packaging shape-stabilizing method of inorganic hydrated salt phase-change heat storage material Pending CN104371658A (en)

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Cited By (25)

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CN105602531A (en) * 2015-09-17 2016-05-25 西北大学 Modified expanded graphite composite heat storage material and preparation method thereof
CN105950120A (en) * 2016-06-17 2016-09-21 北京宇田相变储能科技有限公司 Phase change material for solar energy storage
WO2017020575A1 (en) * 2015-07-31 2017-02-09 江苏启能新能源材料有限公司 Powder phase change energy storage material and preparation method therefor
CN106543974A (en) * 2016-11-10 2017-03-29 桂林电子科技大学 A kind of composite shape-setting phase-change material and preparation method
CN106867466A (en) * 2017-03-27 2017-06-20 北京科技大学 Using flyash and the method for hydrated inorganic salt synthesizing inorganic phase-changing energy storage material
CN106947434A (en) * 2017-04-14 2017-07-14 华南理工大学 A kind of hydrated salt modified expanded graphite composite phase-change material and preparation method thereof
CN107189765A (en) * 2017-07-06 2017-09-22 贺迈新能源科技（上海）有限公司 A kind of deepfreeze hydrous salt phase change material and its preparation method and application
CN107266047A (en) * 2017-06-28 2017-10-20 郑善 A kind of rare-earth ceramic high-temperature phase-change stores exoergic material and preparation method thereof
CN107419819A (en) * 2017-08-29 2017-12-01 华南理工大学 A kind of energy storage construction wall structure containing double-deck phase-change material plate
CN107574982A (en) * 2017-08-11 2018-01-12 华南理工大学 A kind of composite phase-change roofing heat insulating bricks
CN108467711A (en) * 2018-04-26 2018-08-31 浙江科技学院 A kind of inorganic composite phase-change material and preparation method thereof
CN109321208A (en) * 2018-09-29 2019-02-12 西安建筑科技大学 One kind sizing phase-transition heat-preserving material for building, preparation method and applications
CN109609096A (en) * 2018-10-18 2019-04-12 浙江大学山东工业技术研究院 A kind of air conditioner cold accumulation phase-change material and preparation method thereof
CN109679587A (en) * 2018-12-25 2019-04-26 航天科工哈尔滨风华有限公司电站设备分公司 A kind of composite plate and its application having temp regulating function
CN109810675A (en) * 2019-01-28 2019-05-28 华南理工大学 A method of addition inorganic porous material generates setting to hydrous salt phase change material and adjusts phase transition temperature
CN110105924A (en) * 2019-05-13 2019-08-09 中国地质大学（北京） A kind of preparation method of hydrated salt-porous mineral composite phase-change energy storage material
CN110551485A (en) * 2019-07-31 2019-12-10 华南理工大学 hydrated salt phase change energy storage material, preparation method thereof and battery thermal management system
CN110872486A (en) * 2018-08-31 2020-03-10 青海大学 Method for simultaneously inhibiting supercooling of hydrous salt phase change material and enhancing heat transfer performance
CN111040737A (en) * 2019-12-16 2020-04-21 中国科学院青海盐湖研究所 Shaped phase-change energy storage material and preparation method thereof
CN111621264A (en) * 2020-05-21 2020-09-04 国电南瑞科技股份有限公司 Nano modified sodium acetate trihydrate phase change heat storage material and preparation method thereof
CN111849422A (en) * 2020-07-10 2020-10-30 西北农林科技大学 Porous alumina composite shaped phase-change material and preparation method thereof
CN111978922A (en) * 2020-07-31 2020-11-24 西安交通大学 Hydrated salt-based medium-low temperature chemical heat storage material and preparation method thereof
CN113174805A (en) * 2020-05-22 2021-07-27 中国科学院青海盐湖研究所 Road snow melting device of coupling energy system and use method thereof
CN113433347A (en) * 2021-06-24 2021-09-24 中国科学院青海盐湖研究所 AFM sample for hydrous salt phase change energy storage material and preparation method and application thereof
CN114214039A (en) * 2022-01-07 2022-03-22 中国建筑材料科学研究总院有限公司 Hydrated salt porous material composite phase-change plate and preparation method thereof

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CN107266047A (en) * 2017-06-28 2017-10-20 郑善 A kind of rare-earth ceramic high-temperature phase-change stores exoergic material and preparation method thereof
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CN111849422A (en) * 2020-07-10 2020-10-30 西北农林科技大学 Porous alumina composite shaped phase-change material and preparation method thereof
CN111978922A (en) * 2020-07-31 2020-11-24 西安交通大学 Hydrated salt-based medium-low temperature chemical heat storage material and preparation method thereof
CN111978922B (en) * 2020-07-31 2021-04-23 西安交通大学 Hydrated salt-based medium-low temperature chemical heat storage material and preparation method thereof
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CN114214039A (en) * 2022-01-07 2022-03-22 中国建筑材料科学研究总院有限公司 Hydrated salt porous material composite phase-change plate and preparation method thereof

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Application publication date: 20150225