CN110066643A - A kind of eutectic point binary inorganic/expanded graphite phase-changing energy storage material and method - Google Patents
A kind of eutectic point binary inorganic/expanded graphite phase-changing energy storage material and method Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000010439 graphite Substances 0.000 title claims abstract description 76
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 76
- 230000005496 eutectics Effects 0.000 title claims abstract description 73
- 238000004146 energy storage Methods 0.000 title claims abstract description 60
- 239000011232 storage material Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 230000008859 change Effects 0.000 claims abstract description 59
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000012782 phase change material Substances 0.000 claims abstract description 31
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 235000010333 potassium nitrate Nutrition 0.000 claims abstract description 22
- 239000004323 potassium nitrate Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 238000001179 sorption measurement Methods 0.000 claims abstract description 7
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 5
- -1 alkali metal salt Chemical class 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- ZUDYPQRUOYEARG-UHFFFAOYSA-L barium(2+);dihydroxide;octahydrate Chemical compound O.O.O.O.O.O.O.O.[OH-].[OH-].[Ba+2] ZUDYPQRUOYEARG-UHFFFAOYSA-L 0.000 claims description 41
- 239000002131 composite material Substances 0.000 claims description 34
- 239000011521 glass Substances 0.000 claims description 26
- 239000008367 deionised water Substances 0.000 claims description 22
- 229910021641 deionized water Inorganic materials 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 17
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 14
- 238000003760 magnetic stirring Methods 0.000 claims description 13
- 235000011164 potassium chloride Nutrition 0.000 claims description 7
- 239000001103 potassium chloride Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 230000007704 transition Effects 0.000 abstract description 5
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 abstract 2
- 229910001863 barium hydroxide Inorganic materials 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 44
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 235000002639 sodium chloride Nutrition 0.000 description 6
- 238000000113 differential scanning calorimetry Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002500 ions Chemical group 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
Description
技术领域technical field
本发明涉及复合材料储能技术领域，尤其涉及一种低共熔点二元无机类/膨胀石墨相变储能材料与方法。The invention relates to the technical field of composite material energy storage, in particular to a eutectic binary inorganic/expanded graphite phase change energy storage material and method.
背景技术Background technique
能源利用在时间与空间上存在着的供需矛盾，储能技术的发展与应用可有效解决这一问题，提高能源的利用效率。而在相变储能技术领域，相比于有机类相变材料，无机水合盐因其合适的相变温度、较高的储能密度以及成本低廉等一系列优点而引起广泛关注。同时，此类相变材料的相变温度固定，在潜热存储和释放的过程中也可以保持温度恒定，但因温度范围的关系，其对应的应用场合也相对固定，在实际应用上受到一定程度上的限制。因此在保证材料仍具有较高潜热值的条件下，适当降低熔点，改变水合盐相变温度，对于相变材料的多方面使用、扩大其应用范围具有重要意义。There is a contradiction between supply and demand in energy utilization in time and space. The development and application of energy storage technology can effectively solve this problem and improve energy utilization efficiency. In the field of phase change energy storage technology, compared with organic phase change materials, inorganic hydrated salts have attracted extensive attention due to a series of advantages such as suitable phase transition temperature, high energy storage density and low cost. At the same time, the phase change temperature of this type of phase change material is fixed, and the temperature can be kept constant during the storage and release of latent heat. However, due to the relationship between the temperature range, its corresponding application is also relatively fixed, and it is subject to a certain degree of practical application. restrictions on. Therefore, under the condition that the material still has a high latent heat value, appropriately lowering the melting point and changing the phase transition temperature of the hydrated salt is of great significance for the multi-faceted use of phase change materials and the expansion of their application range.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于克服上述现有技术的缺点和不足，提供一种低共熔点二元无机类/膨胀石墨相变储能材料与方法。本发明制备膨胀石墨定型复合材料提高热导率强化传热，获得长期热性能稳定、使用寿命长、节能效果显著、良好的应用性能的材料，对实现建设可持续发展、资源有效利用、环境保护良好的经济型社会有着重要贡献。The purpose of the present invention is to overcome the above-mentioned shortcomings and deficiencies of the prior art, and to provide a eutectic binary inorganic/expanded graphite phase change energy storage material and method. The invention prepares the expanded graphite shaped composite material, improves thermal conductivity and enhances heat transfer, obtains materials with stable long-term thermal performance, long service life, significant energy saving effect and good application performance, which is beneficial to the realization of sustainable development of construction, effective utilization of resources and environmental protection. A good economic society makes an important contribution.
本发明通过下述技术方案实现：The present invention is achieved through the following technical solutions:
一种低共熔点二元无机类/膨胀石墨相变储能材料的制备方法，原料组成(以重量份数计算)：八水氢氧化钡85～95份，碱金属盐5～15份，两者的重量总和为100份；膨胀石墨5～25份，水1～10份；A preparation method of a eutectic binary inorganic/expanded graphite phase change energy storage material, the raw material is composed (calculated in parts by weight): 85-95 parts of barium hydroxide octahydrate, 5-15 parts of an alkali metal salt, two The total weight of the graphite is 100 parts; the expanded graphite is 5-25 parts, and the water is 1-10 parts;
制备步骤包括：将八水氢氧化钡、硝酸钾密封于玻璃瓶中，在85～95℃的水浴锅中加热至熔融态，加入膨胀石墨和水，在85～95℃的水浴锅中进行4～6h物理吸附，并在吸附过程中每隔60～120min搅拌一次，冷却至室温，得到具有低共熔点二元无机类/膨胀石墨相变储能材料。The preparation steps include: sealing barium hydroxide octahydrate and potassium nitrate in a glass bottle, heating to a molten state in a water bath at 85-95 DEG C, adding expanded graphite and water, and performing 4 steps in a water bath at 85-95 DEG C. ~6h physical adsorption, and stirring every 60 ~ 120min during the adsorption process, and cooling to room temperature to obtain a binary inorganic/expanded graphite phase change energy storage material with a eutectic point.
为进一步实现本发明目的，优选地，所述碱金属盐为硝酸钾、氯化钾、硝酸钠和氯化钠中的一种或多种。To further achieve the object of the present invention, preferably, the alkali metal salt is one or more of potassium nitrate, potassium chloride, sodium nitrate and sodium chloride.
优选地，所述水为去除离子形式后的纯水Preferably, the water is pure water after removing the ion form
优选地，上述水浴锅加热温度为85～95℃。Preferably, the heating temperature of the water bath is 85-95°C.
优选地，磁力搅拌时间为40～90min。Preferably, the magnetic stirring time is 40-90 min.
优选地，水浴锅中物理吸附加热时间为4～6h，吸附过程中搅拌间隔时间为60～120min。Preferably, the physical adsorption heating time in the water bath is 4-6h, and the stirring interval in the adsorption process is 60-120min.
采用上述制备方法获得低共熔点二元无机类/膨胀石墨相变储能材料。The above preparation method is used to obtain a eutectic binary inorganic/expanded graphite phase change energy storage material.
一种低共熔点二元无机类/膨胀石墨相变储能材料的制备方法，原料组成：八水氢氧化钡88份，硝酸钾12份，膨胀石墨5份，去离子水4份；A method for preparing a eutectic binary inorganic/expanded graphite phase change energy storage material, the raw materials are composed of: 88 parts of barium hydroxide octahydrate, 12 parts of potassium nitrate, 5 parts of expanded graphite, and 4 parts of deionized water;
具体步骤如下：Specific steps are as follows:
1)室温下，向密封玻璃瓶中加入26.4g八水氢氧化钡，置于90℃水浴锅中水浴加热置熔融态；1) At room temperature, add 26.4g of barium hydroxide octahydrate to a sealed glass bottle, place it in a 90°C water bath and heat it to a molten state;
2)向步骤1)熔融态八水氢氧化钡中加入3.6g硝酸钾，置于90℃水浴锅中磁力搅拌60min，得到具有低共熔点的二元无机类相变材料；2) adding 3.6g of potassium nitrate to step 1) molten barium hydroxide octahydrate, and placing it in a 90°C water bath for magnetic stirring for 60min to obtain a binary inorganic phase change material with a eutectic point;
3)向步骤2)所得具有低共熔点的二元无机类相变材料中加入1.5g膨胀石墨，1.2g去离子水，边加边用玻璃棒搅拌，然后置于90℃水浴锅中水浴加热6h，每隔90min搅拌一次，使其充分混合；3) Add 1.5 g of expanded graphite and 1.2 g of deionized water to the binary inorganic phase change material with a eutectic point obtained in step 2), stir with a glass rod while adding, and then place in a 90° C. water bath for heating in a water bath 6h, stir every 90min to make it fully mixed;
4)将步骤3)所得的复合相变储能材料取出，冷却至室温，即得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料。4) Take out the composite phase change energy storage material obtained in step 3) and cool it to room temperature to obtain a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point.
一种低共熔点二元无机类/膨胀石墨相变储能材料的制备方法，原料组成：八水氢氧化钡88份，硝酸钾12份，膨胀石墨10份，去离子水6份；A method for preparing a eutectic binary inorganic/expanded graphite phase change energy storage material, comprising the following raw materials: 88 parts of barium hydroxide octahydrate, 12 parts of potassium nitrate, 10 parts of expanded graphite, and 6 parts of deionized water;
具体步骤如下：Specific steps are as follows:
1)室温下，向密封玻璃瓶中加入26.4g八水氢氧化钡，置于90℃水浴锅中水浴加热置熔融态；1) At room temperature, add 26.4g of barium hydroxide octahydrate to a sealed glass bottle, place it in a 90°C water bath and heat it to a molten state;
2)向步骤1)熔融态八水氢氧化钡中加入3.6g硝酸钾，置于90℃水浴锅中磁力搅拌60min，得到具有低共熔点的二元无机类相变材料；2) adding 3.6g of potassium nitrate to step 1) molten barium hydroxide octahydrate, and placing it in a 90°C water bath for magnetic stirring for 60min to obtain a binary inorganic phase change material with a eutectic point;
3)向步骤2)所得具有低共熔点的二元无机类相变材料中加入3.0g膨胀石墨，1.8g去离子水，边加边用玻璃棒搅拌，然后置于90℃水浴锅中水浴加热6h，每隔90min搅拌一次，使其充分混合；3) Add 3.0 g of expanded graphite and 1.8 g of deionized water to the binary inorganic phase change material with a eutectic point obtained in step 2), stir with a glass rod while adding, and then place in a 90°C water bath for heating in a water bath 6h, stir every 90min to make it fully mixed;
4)将步骤3)所得的复合相变储能材料取出，冷却至室温，即得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料。4) Take out the composite phase change energy storage material obtained in step 3) and cool it to room temperature to obtain a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point.
一种低共熔点二元无机类/膨胀石墨相变储能材料的制备方法，原料组成：八水氢氧化钡90份，氯化钾10份，膨胀石墨15份，去离子水8份；A method for preparing a eutectic binary inorganic/expanded graphite phase change energy storage material, comprising the following raw materials: 90 parts of barium hydroxide octahydrate, 10 parts of potassium chloride, 15 parts of expanded graphite, and 8 parts of deionized water;
具体步骤如下：Specific steps are as follows:
1)室温下，向密封玻璃瓶中加入27.0g八水氢氧化钡，置于90℃水浴锅中水浴加热置熔融态；1) At room temperature, add 27.0g of barium hydroxide octahydrate to a sealed glass bottle, place it in a 90°C water bath and heat it to a molten state;
2)向步骤1)熔融态八水氢氧化钡中加入3.0g硝酸钾，置于90℃水浴锅中磁力搅拌60min，得到具有低共熔点的二元无机类相变材料；2) adding 3.0 g of potassium nitrate to step 1) molten barium hydroxide octahydrate, and placing it in a 90° C. water bath for magnetic stirring for 60 min to obtain a binary inorganic phase change material with a eutectic point;
3)向步骤2)所得具有低共熔点的二元无机类相变材料中加入4.5g膨胀石墨，2.4g去离子水，边加边用玻璃棒搅拌，然后置于90℃水浴锅中水浴加热6h，每隔90min搅拌一次，使其充分混合；3) Add 4.5 g of expanded graphite and 2.4 g of deionized water to the binary inorganic phase change material with eutectic point obtained in step 2), stir with a glass rod while adding, and then place in a water bath at 90°C for heating in a water bath 6h, stir every 90min to make it fully mixed;
4)将步骤3)所得的复合相变储能材料取出，冷却至室温，即得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料。4) Take out the composite phase change energy storage material obtained in step 3) and cool it to room temperature to obtain a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point.
一种低共熔点二元无机类/膨胀石墨相变储能材料的制备方法，原料组成：八水氢氧化钡90份，氯化钾10份，膨胀石墨20份，去离子水8份；A method for preparing a eutectic binary inorganic/expanded graphite phase change energy storage material, the raw materials are composed of: 90 parts of barium hydroxide octahydrate, 10 parts of potassium chloride, 20 parts of expanded graphite, and 8 parts of deionized water;
具体步骤如下：Specific steps are as follows:
1)室温下，向密封玻璃瓶中加入27.0g八水氢氧化钡，置于90℃水浴锅中水浴加热置熔融态；1) At room temperature, add 27.0g of barium hydroxide octahydrate to a sealed glass bottle, place it in a 90°C water bath and heat it to a molten state;
2)向步骤1)熔融态八水氢氧化钡中加入3.0g硝酸钾，置于90℃水浴锅中磁力搅拌60min，得到具有低共熔点的二元无机类相变材料；2) adding 3.0 g of potassium nitrate to step 1) molten barium hydroxide octahydrate, and placing it in a 90° C. water bath for magnetic stirring for 60 min to obtain a binary inorganic phase change material with a eutectic point;
3)向步骤2)所得具有低共熔点的二元无机类相变材料中加入6.0g膨胀石墨，2.4g去离子水，边加边用玻璃棒搅拌，然后置于90℃水浴锅中水浴加热6h，每隔90min搅拌一次，使其充分混合；3) Add 6.0 g of expanded graphite and 2.4 g of deionized water to the binary inorganic phase change material with eutectic point obtained in step 2), stir with a glass rod while adding, and then place in a 90° C. water bath for heating in a water bath 6h, stir every 90min to make it fully mixed;
4)将步骤3)所得的复合相变储能材料取出，冷却至室温，即得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料。4) Take out the composite phase change energy storage material obtained in step 3) and cool it to room temperature to obtain a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point.
本发明与现有技术相比具有以下优点及效果：Compared with the prior art, the present invention has the following advantages and effects:
本发明通过调整八水氢氧化钡和碱金属盐的质量配比，可以获得具有单一相变温度的低共熔二元无机类相变材料，表现出纯物质的性质。By adjusting the mass ratio of the barium hydroxide octahydrate and the alkali metal salt, the invention can obtain a eutectic binary inorganic phase change material with a single phase transition temperature and exhibit the properties of pure substances.
本发明制备的二元无机类相变材料具有低共熔点，相变温度单一，并且相变温度的改变拓宽了材料的应用范围；The binary inorganic phase-change material prepared by the invention has a low eutectic point, a single phase-change temperature, and the change of the phase-change temperature broadens the application range of the material;
本发明所制备的具有低共熔点的二元无机类/膨胀石墨相变储能材料，热性能稳定、相变焓值高、热导率高；The binary inorganic/expanded graphite phase change energy storage material with low eutectic point prepared by the invention has stable thermal performance, high phase change enthalpy and high thermal conductivity;
本发明制备流程和工艺操作简单，熔融阶段温度低，避免了使用油浴加热，所需条件温和，降低操作过程的危险性；The preparation process and technological operation of the invention are simple, the temperature in the melting stage is low, the use of oil bath heating is avoided, the required conditions are mild, and the risk of the operation process is reduced;
本发明制备中所涉及的仪器设备、无机类原材料价格便宜，成本低。The instruments and equipment and inorganic raw materials involved in the preparation of the present invention are cheap and low in cost.
本发明制备过程中的材料的相互混合，均是简单的机械混合，无需额外的仪器操作。The mutual mixing of the materials in the preparation process of the present invention is all simple mechanical mixing, and no additional instrument operation is required.
附图说明Description of drawings
图1是本发明实施例1中具有低共熔点二元无机类/膨胀石墨复合相变储能材料及其对照的具有低共熔点二元无机类相变材料的单向差示扫描量热图。1 is a unidirectional differential scanning calorimetry diagram of a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point in Example 1 of the present invention and a comparison with a binary inorganic phase change material with a eutectic point .
图2是本发明实施例3中具有低共熔点二元无机类/膨胀石墨复合相变储能材料的单向差示扫描量热图。2 is a unidirectional differential scanning calorimetry diagram of a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point in Example 3 of the present invention.
具体实施方式Detailed ways
下面结合具体实施例对本发明作进一步具体详细描述。The present invention will be further described in detail below in conjunction with specific embodiments.
实施例1：Example 1:
一种具有低共熔点二元无机类/膨胀石墨相变储能材料，由以下重量份数的原料组成：八水氢氧化钡88份，硝酸钾12份，膨胀石墨5份，去离子水4份。A binary inorganic/expanded graphite phase change energy storage material with eutectic melting point, which is composed of the following raw materials by weight: 88 parts of barium hydroxide octahydrate, 12 parts of potassium nitrate, 5 parts of expanded graphite, and 4 parts of deionized water. share.
具体步骤如下：Specific steps are as follows:
1)室温下，向密封玻璃瓶中加入26.4g八水氢氧化钡，置于90℃水浴锅中水浴加热置熔融态；1) At room temperature, add 26.4g of barium hydroxide octahydrate to a sealed glass bottle, place it in a 90°C water bath and heat it to a molten state;
2)向步骤1)熔融态八水氢氧化钡中加入3.6g硝酸钾，置于90℃水浴锅中磁力搅拌60min，得到具有低共熔点的二元无机类相变材料；2) adding 3.6g of potassium nitrate to step 1) molten barium hydroxide octahydrate, and placing it in a 90°C water bath for magnetic stirring for 60min to obtain a binary inorganic phase change material with a eutectic point;
3)向步骤2)所得具有低共熔点的二元无机类相变材料中加入1.5g膨胀石墨，1.2g去离子水，边加边用玻璃棒搅拌，然后置于90℃水浴锅中水浴加热6h，每隔90min搅拌一次，使其充分混合；3) Add 1.5 g of expanded graphite and 1.2 g of deionized water to the binary inorganic phase change material with a eutectic point obtained in step 2), stir with a glass rod while adding, and then place in a 90° C. water bath for heating in a water bath 6h, stir every 90min to make it fully mixed;
4)将步骤3)所得的复合相变储能材料取出，冷却至室温，即得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料。4) Take out the composite phase change energy storage material obtained in step 3) and cool it to room temperature to obtain a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point.
对上述所得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料进行相关热物性的测试，其熔化温度为66.42℃，熔化潜热为201.6J/g，热导率为1.231W/m/K。The related thermal properties of the binary inorganic/expanded graphite composite phase change energy storage material with eutectic melting point obtained above were tested. m/K.
本实施例的具有低共熔点二元无机类/膨胀石墨复合相变储能材料及其对照的具有低共熔点二元无机类相变材料的单向差示扫描量热图如图1所示。Figure 1 shows the unidirectional differential scanning calorimetry of the binary inorganic/expanded graphite composite phase change energy storage material with eutectic point of the present embodiment and its contrasting binary inorganic phase change material with eutectic point .
实施例2：Example 2:
一种具有低共熔点二元无机类/膨胀石墨相变储能材料，由以下重量份数的原料组成：八水氢氧化钡88份，硝酸钾12份，膨胀石墨10份，去离子水6份。A binary inorganic/expanded graphite phase change energy storage material with eutectic melting point, which is composed of the following raw materials by weight: 88 parts of barium hydroxide octahydrate, 12 parts of potassium nitrate, 10 parts of expanded graphite, 6 parts of deionized water share.
具体步骤如下：Specific steps are as follows:
1)室温下，向密封玻璃瓶中加入26.4g八水氢氧化钡，置于90℃水浴锅中水浴加热置熔融态；1) At room temperature, add 26.4g of barium hydroxide octahydrate to a sealed glass bottle, place it in a 90°C water bath and heat it to a molten state;
2)向步骤1)熔融态八水氢氧化钡中加入3.6g硝酸钾，置于90℃水浴锅中磁力搅拌60min，得到具有低共熔点的二元无机类相变材料；2) adding 3.6g of potassium nitrate to step 1) molten barium hydroxide octahydrate, and placing it in a 90°C water bath for magnetic stirring for 60min to obtain a binary inorganic phase change material with a eutectic point;
3)向步骤2)所得具有低共熔点的二元无机类相变材料中加入3.0g膨胀石墨，1.8g去离子水，边加边用玻璃棒搅拌，然后置于90℃水浴锅中水浴加热6h，每隔90min搅拌一次，使其充分混合；3) Add 3.0 g of expanded graphite and 1.8 g of deionized water to the binary inorganic phase change material with a eutectic point obtained in step 2), stir with a glass rod while adding, and then place in a 90°C water bath for heating in a water bath 6h, stir every 90min to make it fully mixed;
4)将步骤3)所得的复合相变储能材料取出，冷却至室温，即得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料。4) Take out the composite phase change energy storage material obtained in step 3) and cool it to room temperature to obtain a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point.
对上述所得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料进行相关热物性的测试，其熔化温度为66.46℃，熔化潜热为198.3J/g，热导率为2.81W/m/K。The related thermal properties of the binary inorganic/expanded graphite composite phase change energy storage material with eutectic melting point obtained above were tested. m/K.
实施例3：Example 3:
一种具有低共熔点二元无机类/膨胀石墨相变储能材料，由以下重量份数的原料组成：八水氢氧化钡90份，氯化钾10份，膨胀石墨15份，去离子水8份。A binary inorganic/expanded graphite phase change energy storage material with eutectic melting point, which is composed of the following raw materials by weight: 90 parts of barium hydroxide octahydrate, 10 parts of potassium chloride, 15 parts of expanded graphite, deionized water 8 servings.
具体步骤如下：Specific steps are as follows:
1)室温下，向密封玻璃瓶中加入27.0g八水氢氧化钡，置于90℃水浴锅中水浴加热置熔融态；1) At room temperature, add 27.0g of barium hydroxide octahydrate to a sealed glass bottle, place it in a 90°C water bath and heat it to a molten state;
2)向步骤1)熔融态八水氢氧化钡中加入3.0g硝酸钾，置于90℃水浴锅中磁力搅拌60min，得到具有低共熔点的二元无机类相变材料；2) adding 3.0 g of potassium nitrate to step 1) molten barium hydroxide octahydrate, and placing it in a 90° C. water bath for magnetic stirring for 60 min to obtain a binary inorganic phase change material with a eutectic point;
3)向步骤2)所得具有低共熔点的二元无机类相变材料中加入4.5g膨胀石墨，2.4g去离子水，边加边用玻璃棒搅拌，然后置于90℃水浴锅中水浴加热6h，每隔90min搅拌一次，使其充分混合；3) Add 4.5 g of expanded graphite and 2.4 g of deionized water to the binary inorganic phase change material with eutectic point obtained in step 2), stir with a glass rod while adding, and then place in a water bath at 90°C for heating in a water bath 6h, stir every 90min to make it fully mixed;
4)将步骤3)所得的复合相变储能材料取出，冷却至室温，即得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料。4) Take out the composite phase change energy storage material obtained in step 3) and cool it to room temperature to obtain a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point.
对上述所得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料进行相关热物性的测试，其熔化温度为66.13℃，熔化潜热为180.6J/g，热导率为5.307W/m/K。The related thermal properties of the binary inorganic/expanded graphite composite phase change energy storage material with eutectic melting point obtained above were tested. m/K.
本实施例的具有低共熔点二元无机类/膨胀石墨复合相变储能材料的单向差示扫描量热图如图2所示。The unidirectional differential scanning calorimetry of the eutectic binary inorganic/expanded graphite composite phase change energy storage material of this embodiment is shown in FIG. 2 .
实施例4：Example 4:
一种具有低共熔点二元无机类/膨胀石墨相变储能材料，由以下重量份数的原料组成：八水氢氧化钡90份，氯化钾10份，膨胀石墨20份，去离子水8份。A binary inorganic/expanded graphite phase change energy storage material with eutectic melting point, which is composed of the following raw materials by weight: 90 parts of barium hydroxide octahydrate, 10 parts of potassium chloride, 20 parts of expanded graphite, deionized water 8 servings.
具体步骤如下：Specific steps are as follows:
1)室温下，向密封玻璃瓶中加入27.0g八水氢氧化钡，置于90℃水浴锅中水浴加热置熔融态；1) At room temperature, add 27.0g of barium hydroxide octahydrate to a sealed glass bottle, place it in a 90°C water bath and heat it to a molten state;
2)向步骤1)熔融态八水氢氧化钡中加入3.0g硝酸钾，置于90℃水浴锅中磁力搅拌60min，得到具有低共熔点的二元无机类相变材料；2) adding 3.0 g of potassium nitrate to step 1) molten barium hydroxide octahydrate, and placing it in a 90° C. water bath for magnetic stirring for 60 min to obtain a binary inorganic phase change material with a eutectic point;
3)向步骤2)所得具有低共熔点的二元无机类相变材料中加入6.0g膨胀石墨，2.4g去离子水，边加边用玻璃棒搅拌，然后置于90℃水浴锅中水浴加热6h，每隔90min搅拌一次，使其充分混合；3) Add 6.0 g of expanded graphite and 2.4 g of deionized water to the binary inorganic phase change material with eutectic point obtained in step 2), stir with a glass rod while adding, and then place in a 90° C. water bath for heating in a water bath 6h, stir every 90min to make it fully mixed;
4)将步骤3)所得的复合相变储能材料取出，冷却至室温，即得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料。4) Take out the composite phase change energy storage material obtained in step 3) and cool it to room temperature to obtain a binary inorganic/expanded graphite composite phase change energy storage material with a eutectic point.
对上述所得到具有低共熔点二元无机类/膨胀石墨复合相变储能材料进行相关热物性的测试，其熔化温度为66.32℃，熔化潜热为175.3J/g，热导率为6.544W/m/K。The related thermal properties of the binary inorganic/expanded graphite composite phase change energy storage material with eutectic melting point obtained above were tested. m/K.
如上所述，便可较好地实现本发明。As described above, the present invention can be preferably implemented.
本发明的实施方式并不受上述实施例的限制，其他任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。The embodiments of the present invention are not limited by the above-mentioned examples, and any other changes, modifications, substitutions, combinations and simplifications made without departing from the spirit and principle of the present invention shall be equivalent substitution methods, which are included in the within the protection scope of the present invention.
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