CN108504331A - The preparation method of three-dimensional sizing high heat conductance phase-change accumulation energy charred wood - Google Patents
The preparation method of three-dimensional sizing high heat conductance phase-change accumulation energy charred wood Download PDFInfo
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- CN108504331A CN108504331A CN201810298310.4A CN201810298310A CN108504331A CN 108504331 A CN108504331 A CN 108504331A CN 201810298310 A CN201810298310 A CN 201810298310A CN 108504331 A CN108504331 A CN 108504331A
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Abstract
The present invention relates to a kind of preparation methods of three-dimensional sizing high heat conductance phase-change accumulation energy charred wood, include the following steps 1, be put into wooden unit in high temperature babinet, it is heated to 800 DEG C 1000 DEG C in a nitrogen atmosphere, keeps the temperature 2 h, 5 h, cools to and be not much different in 10 DEG C with room temperature.2, tetradecyl alchohol is positioned in container, is warming up to 50 DEG C of heating, until tetradecyl alchohol melts completely.3, charing wooden unit is added in the tetradecyl alchohol of melting, is put into 2 h, 8 h in 40 DEG C of 100 DEG C of vacuum drying ovens, obtain three-dimensional sizing high heat conductance phase-change accumulation energy timber.Advantage：1）It derives from a wealth of sources, of low cost, intensity is good, has good adsorption capacity and higher thermal conductivity, meets the requirement of Green Chemistry；2）The three-dimensional porous structure of log, and the adsorption rate with bigger and higher thermal conductivity are remained, products therefrom thermal storage performance is excellent, has the characteristics that installation ability is big, enthalpy of phase change is larger；3）Operating procedure is simple, and fund input is few, short preparation period, and reaction condition is mild.
Description
Technical field
The present invention is a kind of using charred wood as the preparation of the three-dimensional sizing high heat conductance phase-change accumulation energy timber of backing material
Method belongs to phase-change accumulation energy new material research field.
Background technology
The new energy such as continuous reduction and solar energy, wind energy, tide energy due to non-renewable energy resources such as current fossils are deposited
In certain intermittence, energy storage material is more and more important in energy source use and evolution.Phase-changing energy storage material is because have
Good heat storage capacity and receive extensive attention.Currently used phase-change material is divided into inorganic phase-changing material and organic phase-change material
Material.There is the problems such as phase separation and degree of supercooling in inorganic phase-changing material, but organic phase change material not only overcomes inorganic phase-changing material institute
There are the problem of, and have many advantages, such as：Good thermal stability, higher latent heat is non-corrosive, nontoxicity etc..But
Current phase-change material still has some problems：（1）Fluid leakage problems can occur in phase transition process, surrounding can be polluted
Environment, influence the use of phase-change material；（2）Lower thermal conductivity makes material that there is low heat to transmit, to make material local temperature
Height causes the harm such as fire.Researcher in order to solve these problems, is prepared for high heat conductance shape-stabilized phase change energy storage.One
As be used for improving the material of thermal conductivity：Graphene, carbon nanotube, graphite etc., but these materials generally are one-dimensional or two-dimensional
Nano material, and cost is higher.
Invention content
Proposed by the present invention is a kind of system for high heat conductance phase-change accumulation energy timber of shaping using charred wood as the three-dimensional of raw material
Preparation Method is provided and a kind of preparing excellent heat accumulation its object is to overcome existing for phase-change material easily leakage, the problems such as thermal conductivity is low
The method of the phase-change accumulation energy timber of performance and high thermal conductivity.Preparation process is simple, and product can be widely applied to furniture, food storage
The field of solar heat such as deposit, build.
Technical solution of the invention：The preparation method of three-dimensional sizing high heat conductance phase-change accumulation energy charred wood, including
Following steps：
（1）Prepare charred wood：Wooden unit is put into high temperature babinet, is heated to 800 DEG C -1000 DEG C in a nitrogen atmosphere, is protected
After 2 h-5 h of temperature, cools to and be not much different in 10 DEG C with room temperature, obtain charred wood；
（2）Melt tetradecyl alchohol：Tetradecyl alchohol is positioned in container, is warming up to 50 DEG C, until tetradecyl alchohol melts completely；
（3）Dipping：Charred wood is impregnated into the tetradecyl alchohol of melting, is put into 40 DEG C of -100 DEG C of vacuum drying ovens, keeps 2
H-8 h obtain three-dimensional sizing high heat conductance phase-change accumulation energy timber.
Beneficial effects of the present invention：
1）Backing material is charred wood, has three-dimensional porous structure, derives from a wealth of sources, and of low cost, intensity is good, is had good
Adsorption capacity and higher thermal conductivity, meet the requirement of Green Chemistry；
2）Gained three-dimensional sizing high heat conductance phase-change accumulation energy timber remains the three-dimensional porous structure of log, and thermal conductivity is higher, reaches
To 0.805 Wm-1K-1, thermal storage performance is excellent, and enthalpy of phase change is 159.8 kJ/kg, and it is larger to install ability；
3）Operating procedure is simple, and fund input is few, short preparation period（4 h-13 h）, reaction condition is mild（25℃~100℃）,
Large-scale instrument and equipment is not needed, large-scale industrial production processing may be implemented, be with a wide range of applications.
Description of the drawings
Attached drawing 1 is the cross section of gained charred wood, vertical section scanning electron microscope（SEM）Photo.
Attached drawing 2 is the cross section of three-dimensional sizing high heat conductance phase-change accumulation energy timber, vertical section scanning electron microscope（SEM）Photo.
Attached drawing 3 is the thermal conductivity bar shaped of tetradecyl alchohol, log, charred wood, three-dimensional sizing high heat conductance phase-change accumulation energy timber
Figure；
Attached drawing 4 is the DSC curve of three-dimensional sizing high heat conductance phase-change accumulation energy timber.
Specific implementation mode
The method for preparing three-dimensional sizing high heat conductance phase-change accumulation energy charred wood, includes the following steps：
（1）Prepare charred wood：Wooden unit is put into high temperature babinet, is heated to 800 DEG C -1000 DEG C in a nitrogen atmosphere, is protected
After 2 h-5 h of temperature, cools to and be not much different in 10 DEG C with room temperature, obtain charred wood；
（2）Melt tetradecyl alchohol：Tetradecyl alchohol is positioned in container, is warming up to 50 DEG C, until tetradecyl alchohol melts completely；
（3）Dipping：Charred wood is impregnated into the tetradecyl alchohol of melting, is put into 40 DEG C of -100 DEG C of vacuum drying ovens, keeps 2
H-8 h obtain three-dimensional sizing high heat conductance phase-change accumulation energy timber.
The wooden unit is one in China fir, pine, poplar, birch, Chinese catalpa wood, yellow jacket, white rubber, toothed oak wood, Manchurian ash, elm
Kind.
The characterization of three-dimensional sizing high heat conductance phase-change accumulation energy timber：Macroscopic token is carried out using digital camera, it is shown that three
The grand design of dimension sizing high heat conductance phase-change accumulation energy timber；Charred wood is characterized by SEM it is found that charred wood is protected
The original three-dimensional porous structure of timber is stayed；After filling tetradecyl alchohol, duct is filled up by tetradecyl alchohol, and duct disappears；By hot normal
Number analyzer measures the thermal conductivity point of tetradecyl alchohol, log, charred wood, three-dimensional sizing high heat conductance phase-change accumulation energy timber at room temperature
It Wei not 0.312 Wm-1K-1、 0.412 Wm-1K-1、0.805 Wm-1K-1、0.669 Wm-1K-1；Using differential scanning calorimeter
（DSC）It is as follows to three-dimensional sizing high heat conductance phase-change accumulation energy timber characterization result：Melt phase change temperature is 36.92 DEG C, melting behaviors
Change enthalpy is 165.8 kJ/kg；Liquid-solid phase transition temperature and solid-solid phase-change temperature are respectively 36.90 DEG C and 32.92 DEG C, the two phase
Change enthalpy has fine thermal storage performance into 159.8 kJ/kg.
Technical solution of the present invention is further illustrated below in conjunction with the accompanying drawings
（1）Prepare charred wood：Wooden unit is put into high temperature babinet, is heated to 800 DEG C -1000 DEG C in a nitrogen atmosphere, is protected
After 2 h-5 h of temperature, 10-30 DEG C is cooled to, obtains charred wood；As shown in Fig. 1, charred wood obtained has three-dimensional
Porous structure.
（2）Melt tetradecyl alchohol：Tetradecyl alchohol is positioned in container, is warming up to 50 DEG C, until tetradecyl alchohol melts completely；
（3）Dipping：Charred wood is impregnated into the tetradecyl alchohol of melting, is put into 40 DEG C of -100 DEG C of vacuum drying ovens, keeps 2
H-8 h obtain three-dimensional sizing high heat conductance phase-change accumulation energy timber.As shown in Fig. 2, attached drawing 1 is compared, charred wood is in filling ten
After tetrol, duct is filled up by tetradecyl alchohol, and duct disappears.
As shown in Fig. 3, the three of tetradecyl alchohol, log, charred wood and preparation are measured at room temperature by thermal constant analyzer
The thermal conductivity of dimension sizing high heat conductance phase-change accumulation energy timber is respectively 0.312 Wm-1K-1、 0.412 Wm-1K-1、0.805 Wm-1K-1、0.669 Wm-1K-1；Comparison can obtain charred wood has higher thermal conductivity, three-dimensional sizing high heat conductance phase than log
Become energy storage timber has higher thermal conductivity than charred wood and pure tetradecyl alchohol.
As shown in Fig. 4, three-dimensional sizing high heat conductance phase-change accumulation energy timber has larger enthalpy of phase change, melt phase change temperature
It it is 36.92 DEG C, melt phase change enthalpy is 165.8 kJ/kg；Liquid-solid phase transition temperature and solid-solid phase-change temperature are respectively 36.90 DEG C
With 32.92 DEG C, the two enthalpy of phase change be 159.8 kJ/kg, have fine thermal storage performance.
Embodiment 1
1, japanese xylosma root is cut into wood particle according to the specification that product design scheme requires, be placed in tube furnace, in a nitrogen atmosphere
900 DEG C are heated to, after keeping 3 h, 27 DEG C is cooled to, obtains charred wood.
2, tetradecyl alchohol is positioned in container, is warming up to 50 DEG C, until tetradecyl alchohol melts completely.
3, charred wood is impregnated into the tetradecyl alchohol of melting, is put into 75 DEG C of vacuum drying oven and keeps 4 h, obtain three
Dimension sizing high heat conductance phase-change accumulation energy timber.
Embodiment 2
1, Manchurian ash is cut into wood particle according to the specification that product design scheme requires, be placed in tube furnace, in nitrogen atmosphere
Under be heated to 1000 DEG C, after keeping 2.5 h, cool to 23 DEG C, obtain charred wood.
2, tetradecyl alchohol is positioned in container, is warming up to 50 DEG C, until tetradecyl alchohol melts completely.
3, charred wood is impregnated into the tetradecyl alchohol of melting, is put into 87 DEG C of vacuum drying oven and keeps 3.5 h, obtained
Three-dimensional sizing high heat conductance phase-change accumulation energy timber.
Claims (3)
1. a kind of preparation method of three-dimensional sizing high heat conductance phase-change accumulation energy charred wood, it is characterized in that including the following steps：
（1）Prepare charred wood：Wooden unit is put into high temperature babinet, is heated to 800 DEG C -1000 DEG C in a nitrogen atmosphere, is protected
After 2 h-5 h of temperature, cools to and be not much different in 10 DEG C with room temperature, obtain charred wood；
（2）Melt tetradecyl alchohol：Tetradecyl alchohol is positioned in container, is warming up to 50 DEG C, until tetradecyl alchohol melts completely；
（3）Dipping：Charred wood is impregnated into the tetradecyl alchohol of melting, is put into 40 DEG C of -100 DEG C of vacuum drying ovens, keeps 2
H-8 h obtain three-dimensional sizing high heat conductance phase-change accumulation energy timber.
2. a kind of preparation method of three-dimensional sizing high heat conductance phase-change accumulation energy charred wood as described in claim 1, feature
It is that the wooden unit is one kind in China fir, pine, poplar, birch, Chinese catalpa wood, yellow jacket, white rubber, toothed oak wood, Manchurian ash, elm.
3. a kind of preparation method of three-dimensional sizing high heat conductance phase-change accumulation energy charred wood as described in claim 1, feature
It is that the high temperature babinet is tube furnace, it is 40 DEG C -100 DEG C to have sealing function, temperature range.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114058335A (en) * | 2020-08-04 | 2022-02-18 | 中国科学院大连化学物理研究所 | Preparation and application of natural environment-friendly shape-stabilized phase change material |
| CN115505375A (en) * | 2022-09-23 | 2022-12-23 | 同济大学 | Preparation method of hierarchical magnetic porous carbonized wood composite phase change material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103694963A (en) * | 2013-12-09 | 2014-04-02 | 中国科学院深圳先进技术研究院 | Composite phase change material and preparation method thereof |
| CN107057649A (en) * | 2017-04-21 | 2017-08-18 | 常州达奥新材料科技有限公司 | A kind of preparation method of temperature regulating building phase-changing energy storage material |
-
2018
- 2018-04-04 CN CN201810298310.4A patent/CN108504331A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103694963A (en) * | 2013-12-09 | 2014-04-02 | 中国科学院深圳先进技术研究院 | Composite phase change material and preparation method thereof |
| CN107057649A (en) * | 2017-04-21 | 2017-08-18 | 常州达奥新材料科技有限公司 | A kind of preparation method of temperature regulating building phase-changing energy storage material |
Non-Patent Citations (3)
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| ZHAO YAJING ET AL.: "Honeycomb-like structured biological porous carbon encapsulating PEG: A shape-stable phase change material with enhanced thermal conductivity for thermal energy storage", 《ENERGY AND BUILDINGS》 * |
| 杜伟娜: "《可再生的碳源—生物质能》", 31 August 2015, 北京工业大学出版社 * |
| 谢成等: "聚乙二醇木材复合相变储能材料的制备及表征", 《林业科学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114058335A (en) * | 2020-08-04 | 2022-02-18 | 中国科学院大连化学物理研究所 | Preparation and application of natural environment-friendly shape-stabilized phase change material |
| CN115505375A (en) * | 2022-09-23 | 2022-12-23 | 同济大学 | Preparation method of hierarchical magnetic porous carbonized wood composite phase change material |
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Application publication date: 20180907 |