High temperature-resistant polymer phase-transition material

A phase change and polymer technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as easy falling off, application limitations, and decomposition of phase change materials

Inactive Publication Date: 2006-10-25
TAIWAN TEXTILE RESEARCH INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods are to make phase change materials into microcapsules. The first method is to use the post-finishing method to allow the microcapsules embedded with phase change materials to adhere to the surface of textile fibers or fabrics, because it is easy to fall off, so its application has certain limitations
The second way is to apply it directly on spinning, because of the use of solvents, there are problems with solvent recovery and environmental protection
Therefore, for currently common phase change materials, such as alkanes with long carbon chains and carboxylic esters disclosed in U.S. Patent Publication No. 2004 / 0026659, thermogravimetric analysis shows that the maximum thermal The weight loss temperature is around 150°C, so under the conditions of melt spinning, the phase change material may be decomposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 60 grams of polyethylene glycol 600, 57 grams of stearic acid, 1 milliliter of sulfuric acid and 200 milliliters of toluene for a reflux reaction to reduce the water in the reaction system to facilitate esterification The reaction proceeds. After the product is purified, polyethylene glycol 600-distearate is obtained. Next, use a thermal differential scanner (Differential Scanning Calorimetry; DSC) to measure the melting point of polyethylene glycol 600-distearate, the measured melting point is 38.4 ° C, and use a thermal gravimetric analyzer (ThermalGravity Analyzer; TGA) to analyze The thermogravimetric loss curve of polyethylene glycol 600-distearate shows that its maximum thermogravimetric loss temperature is about 389°C.

Embodiment 2

[0022] After mixing 150 grams of polyethylene glycol 1500, 57 grams of stearic acid and 1.0 grams of p-toluenesulfonic acid, the above mixture was heated and vacuumed to facilitate removal of water in the reaction system. After purification, polyethylene glycol 1500-distearate is obtained. The melting point of the polyethylene glycol 1500-distearate measured by the thermal differential scanner is about 35.0°C, and the maximum heat of the polyethylene glycol 1500-distearate measured by the thermogravimetric analyzer is The weight loss temperature is about 392°C.

Embodiment 3

[0024] 200 grams of polytetramethylene glycol 2000, 60.6 grams of stearic acid chloride and 200 milliliters of N, N-dimethylformamide (N, N-dimethylformamide; DMF) are mixed together, then carry out heating reaction, and simultaneously Capture and neutralize the hydrochloric acid gas generated by the reaction. After purification, polytetramethylene glycol 2000-distearate is obtained. The melting point of the polytetramethylene glycol 2000-distearate measured by the thermal differential scanner is about 28.9 ° C, and the maximum heat of the polytetramethylene glycol 2000-distearate measured by the thermogravimetric analyzer is The weight loss temperature is about 398°C.

[0025] The physical properties of the prepared polymer phase change materials are listed below. Listed in Table 1 is the melting point and maximum thermogravimetric loss temperature of polyethylene glycol fatty acid ester, and listed in Table 2. The melting point and maximum thermogravimetric loss temperatur...

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Abstract

The invention relates to a high temperature resistance macromolecule phase change material-polyether fatty acid ester. The main chain of the polyether is polyethylene glycol or polytetramethylene glycol and the fatty acid acyl is stearic acid acyl, palmitic acid acyl or lauric acid acyl.

Description

technical field [0001] The invention relates to a phase-change polymer material, and in particular to a high-temperature-resistant phase-change polymer material. Background technique [0002] A phase change material is a substance that can change from a solid phase to a liquid phase or from a liquid phase to a solid phase within a specific temperature range, and the change will be accompanied by the absorption or release of a large amount of latent heat. Common phase change materials are paraffinic hydrocarbons (paraffinic hydrocarbons; C n h 2n+2 ). The biggest feature of phase change materials is that when they absorb or release a large amount of latent heat, they can maintain a certain temperature in the system. Therefore, one of its common applications is to use this thermal insulation property to make thermal insulation textiles. [0003] Currently, there are two ways to integrate phase change materials into fabrics. The first is to embed the phase change material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 林岩锡
Owner TAIWAN TEXTILE RESEARCH INSTITUTE
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