CN104371659A - Attapulgite-base composite phase-change heat storage material and preparation method thereof - Google Patents
Attapulgite-base composite phase-change heat storage material and preparation method thereof Download PDFInfo
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- CN104371659A CN104371659A CN201410595587.5A CN201410595587A CN104371659A CN 104371659 A CN104371659 A CN 104371659A CN 201410595587 A CN201410595587 A CN 201410595587A CN 104371659 A CN104371659 A CN 104371659A
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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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Abstract
The invention discloses an attapulgite-base composite phase-change heat storage material and a preparation method thereof. The composite phase-change heat storage material is compounded from 25-50 wt% of phase-change material and 50-75 wt% of attapulgite. The phase-change material is long chain fatty acid, polyalcohol, paraffin, n-hexadecane, n-octadecane, n-heptacosane or inorganic hydrated salt. The preparation method comprises the following steps: (1) thoroughly and uniformly mixing the dried attapulgite and phase-change material according to the proportion; (2) putting the mixture in a vacuum environment, and sufficiently stirring while heating to enhance the adsorptivity of the attapulgite for the phase-change material; and (3) shifting the mixture out of the vacuum environment, and naturally cooling to room temperature to obtain the attapulgite-base composite phase-change heat storage material. The composite phase-change heat storage material has the advantages of high enthalpy of phase change, favorable thermal cyclicity, no leakage, low cost and the like, and can be widely used in the fields of industrial waste heat recovery, solar energy utilization, architectural energy conservation and the like.
Description
Technical field
The present invention relates to materials science field, be specifically related to a kind of attapulgite base composite phase-change heat accumulating and preparation method thereof.
Background technology
Phase-change accumulation energy is the energy absorption or release that under certain condition, between material generation phase, change (referring generally to change between solid-liquid two kinds of phases) causes, thus makes material have thermal energy storage and thermoregulator function.Compared with general lagging material, phase-changing energy storage material has the good characteristics such as volume is little, thermo-efficiency is high, energy storage density is large.
Apply more phase change material, have that enthalpy of phase change is high, nontoxic, non-corrosiveness, the advantage such as cheap and easy to get, but there is the defect of easily leaking in it in solid-liquid phase change process, and organic phase change material then exists the defect of intrinsic thermostability, heat conductivility difference.
Usually, select, using the good porous material of absorption property as propping material, phase change material to be adsorbed in its pore passage structure, to utilize the capillary absorption performance in its duct, reach the object that control phase change material is revealed.Obtain high, nontoxic, the non-corrosiveness of enthalpy of phase change, do not leak, cheap and easy to get and thermostability, good heat conductivity composite phase-change heat-storage material is the direction that this area related personnel makes great efforts.
Summary of the invention
For prior art present situation, the invention provides a kind of attapulgite base composite phase-change heat accumulating and preparation method thereof.The phase change material that the present invention adopts attapulgite material higher to enthalpy of phase change carries out absorption setting, is strengthened the adsorption of phase change material and porous material, strengthen its thermostability, improve its over-all properties by Vacuum infusion techniques.Composite phase-change heat-storage material prepared by the present invention also has that enthalpy of phase change is high, thermal cycling good, does not leak, the advantage such as with low cost, can be widely used in industrial afterheat recovery, Solar use, the fields such as building energy conservation.
Set forth technical scheme of the present invention below.
A kind of attapulgite base composite phase-change heat accumulating, is formed by the phase change material of 25-50wt ﹪ and the attapulgite clay compounded of 50-75wt ﹪; Described phase change material is longer chain fatty acid, polyvalent alcohol, paraffin, n-hexadecane, Octadecane, NSC 62789 or inorganic hydrated salt.
A preparation method for attapulgite base composite phase-change heat accumulating, comprises the steps: that dried attapulgite proportionally fully mixes with phase change material by (1); (2) under the mixture that front step obtains being placed in vacuum environment, heating is also fully stirred, and promotes that attapulgite is to the absorption of phase change material; (3) mixture is shifted out from vacuum environment, naturally cool to room temperature, attapulgite base composite phase-change heat accumulating can be obtained.
Accompanying drawing explanation
It is the Octadecane-attapulgite clay compounded phase change material SEM photo of different ratios in Fig. 1 a-Fig. 1 e;
It is the Octadecane-attapulgite clay compounded phase change material thawing DSC curve of different ratios in Fig. 2;
Octadecane-attapulgite clay compounded phase change material 20 DSC cyclic curves in Fig. 3.
Embodiment
Embodiment 1:
Get the 25ml beaker of clean dried, add 6g attapulgite powder, 100
odrying 30 minutes in C baking oven; Weigh 2g phase change material and add beaker, ultrasonic disperse 10 min, makes phase change material mix with attapulgite; Biased sample is put into 45 DEG C of vacuum drying ovens, vacuumize 8 hours; Period with the sample in glass stick uniform stirring beaker, promoted that attapulgite was to the abundant absorption of phase change material every 2 hours; Take out sample, naturally cool to room temperature, obtain prepared attapulgite base composite phase-change heat accumulating; The transformation temperature of gained composite shape-setting phase-change heat-storage material is 29.4 DEG C, and latent heat of phase change value is 28.2 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:
Get the 25ml beaker of clean dried, add 6g attapulgite powder, 100
odrying 30 minutes in C baking oven; Weigh 3g phase change material and add beaker, ultrasonic disperse 10 min, makes phase change material mix with attapulgite; Biased sample is put into 45 DEG C of vacuum drying ovens, vacuumize 8 hours.Period with the sample in glass stick uniform stirring beaker, promoted that attapulgite was to the abundant absorption of phase change material every 2 hours; Take out sample, naturally cool to room temperature, obtain prepared attapulgite base composite phase-change heat accumulating; The transformation temperature of gained composite shape-setting phase-change heat-storage material is 29.8 DEG C, and latent heat of phase change value is 54.7 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:
Get the 25ml beaker of clean dried, add 6g attapulgite powder, 100
odrying 30 minutes in C baking oven; Weigh 4g phase change material and add beaker, ultrasonic disperse 10 min, makes phase change material mix with attapulgite; Biased sample is put into 45 DEG C of vacuum drying ovens, vacuumize 8 hours.Period with the sample in glass stick uniform stirring beaker, promoted that attapulgite was to the abundant absorption of phase change material every 2 hours; Take out sample, naturally cool to room temperature, obtain prepared attapulgite base composite phase-change heat accumulating; The transformation temperature of gained composite shape-setting phase-change heat-storage material is 29.4 DEG C, and latent heat of phase change value is 77.6J/g; The SEM photo of this embodiment and DSC test result are respectively as shown in Fig. 1 c, Fig. 2 c.
Embodiment 4:
Get the 25ml beaker of clean dried, add 6g attapulgite powder, 100
odrying 30 minutes in C baking oven; Weigh 5g phase change material and add beaker, ultrasonic disperse 10 min, makes phase change material mix with attapulgite; Biased sample is put into 45 DEG C of vacuum drying ovens, vacuumize 8 hours.Period with the sample in glass stick uniform stirring beaker, promoted that attapulgite was to the abundant absorption of phase change material every 2 hours; Take out sample, naturally cool to room temperature, obtain prepared attapulgite base composite phase-change heat accumulating; The transformation temperature of gained composite shape-setting phase-change heat-storage material is 29.0 DEG C, and latent heat of phase change value is 94.2 J/g; The SEM photo of this embodiment and DSC test result are respectively as shown in Fig. 1 d, Fig. 2 d.
Embodiment 5:
Get the 25ml beaker of clean dried, add 6g attapulgite powder, 100
odrying 30 minutes in C baking oven; Weigh 6g phase change material and add beaker, ultrasonic disperse 10 min, makes phase change material mix with attapulgite; Biased sample is put into 45 DEG C of vacuum drying ovens, vacuumize 8 hours.Period with the sample in glass stick uniform stirring beaker, promoted that attapulgite was to the abundant absorption of phase change material every 2 hours; Take out sample, naturally cool to room temperature, obtain prepared attapulgite base composite phase-change heat accumulating; The transformation temperature of gained composite shape-setting phase-change heat-storage material is 29.4 DEG C, and latent heat of phase change value is 101.4 J/g; The SEM photo of this embodiment and DSC test result are respectively as shown in Fig. 1 e, Fig. 2 e.
Claims (4)
1. an attapulgite base composite phase-change heat accumulating, is formed by the phase change material of 25-50wt ﹪ and the attapulgite clay compounded of 50-75wt ﹪.
2. attapulgite base composite phase-change heat accumulating according to claim 1, wherein said phase change material is longer chain fatty acid, polyvalent alcohol, paraffin, n-hexadecane, Octadecane, NSC 62789 or inorganic hydrated salt.
3. a preparation method for attapulgite base composite phase-change heat accumulating, comprises the steps:
(1) dried attapulgite is proportionally fully mixed with phase change material;
(2) under the mixture that front step obtains being placed in vacuum environment, heating is also fully stirred, and promotes that attapulgite is to the absorption of phase change material;
(3) mixture is shifted out from vacuum environment, naturally cool to room temperature, attapulgite base composite phase-change heat accumulating can be obtained.
4. want the preparation method described in 3 according to right, the wherein said mixture time be placed under vacuum environment is 8 hours, and the temperature under described vacuum environment is 45
oc.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107142087A (en) * | 2017-04-25 | 2017-09-08 | 安徽博硕科技有限公司 | A kind of preparation method for attapulgite/butyl stearate/wax phase change energy-storage composite material that nano strontium titanate is modified |
| CN108822804A (en) * | 2018-07-04 | 2018-11-16 | 青海大学 | A kind of phase-changing energy storage material and preparation method thereof encapsulated with porous material |
| CN110257017A (en) * | 2019-06-18 | 2019-09-20 | 上海大学 | Fatty acid/attapulgite modified/expanded graphite composite phase-changing energy storage material and preparation method thereof |
| CN113249096A (en) * | 2021-05-17 | 2021-08-13 | 河北科技大学 | Porous medium composite phase change material and preparation method and application thereof |
| CN113429943A (en) * | 2021-07-23 | 2021-09-24 | 中国科学院广州能源研究所 | Modified attapulgite and preparation method of modified attapulgite-based composite phase change material |
| CN113637459A (en) * | 2021-07-13 | 2021-11-12 | 中南大学 | Preparation method of composite mineral microsphere-based phase-change heat storage material |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107142087A (en) * | 2017-04-25 | 2017-09-08 | 安徽博硕科技有限公司 | A kind of preparation method for attapulgite/butyl stearate/wax phase change energy-storage composite material that nano strontium titanate is modified |
| CN108822804A (en) * | 2018-07-04 | 2018-11-16 | 青海大学 | A kind of phase-changing energy storage material and preparation method thereof encapsulated with porous material |
| CN110257017A (en) * | 2019-06-18 | 2019-09-20 | 上海大学 | Fatty acid/attapulgite modified/expanded graphite composite phase-changing energy storage material and preparation method thereof |
| CN113249096A (en) * | 2021-05-17 | 2021-08-13 | 河北科技大学 | Porous medium composite phase change material and preparation method and application thereof |
| CN113249096B (en) * | 2021-05-17 | 2022-02-11 | 河北科技大学 | Porous medium composite phase change material and preparation method and application thereof |
| CN113637459A (en) * | 2021-07-13 | 2021-11-12 | 中南大学 | Preparation method of composite mineral microsphere-based phase-change heat storage material |
| CN113637459B (en) * | 2021-07-13 | 2022-07-12 | 中南大学 | Preparation method of composite mineral microsphere-based phase-change heat storage material |
| CN113429943A (en) * | 2021-07-23 | 2021-09-24 | 中国科学院广州能源研究所 | Modified attapulgite and preparation method of modified attapulgite-based composite phase change material |
| CN113429943B (en) * | 2021-07-23 | 2022-08-05 | 中国科学院广州能源研究所 | Modified attapulgite and preparation method of modified attapulgite-based composite phase change material |
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