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Preparation method of amphipathic comb-shaped polymer phase change energy storage material

A phase change energy storage material, comb polymer technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems affecting the properties of finished polymers, amphiphilic structure and difficult control of properties, etc. High efficiency and simple operation

Active Publication Date: 2014-10-08
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are few studies on amphiphilic comb polymer phase change materials, and the amphiphilic structure and properties of the reported amphiphilic comb polymers are difficult to control, especially the small molecular substances (such as catalysts) in the finished product. Presence seriously affects the properties of the finished polymer

Method used

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Embodiment 1

[0039] 1) Dissolve poly(oxyethylene) stearyl ether (the degree of polymerization of ethylene oxide is 10) (i.e. B76) in dichloromethane (MC), and add the acid-binding acid dropwise in an ice-water bath at 0°C Catalyst triethylamine (TEA) and methanesulfonyl chloride (MsCl); The molar mass of described triethylamine is 3 times of B76, and the molar mass of methanesulfonyl chloride is 1.5 times of B76; 2 Under protection, mechanical stirring was reacted for 8 hours; after the reaction was completed, 0.5mol / L hydrochloric acid was added to the reaction product until a homogeneous solution was formed and bubbles were no longer produced, (removing unreacted TEA and MsCl), and the solution was divided into Layer, separate liquid to collect the lower layer solution, carry out rotary evaporation to the lower layer solution at room temperature, remove MC, obtain the compound with acyl active group;

[0040] 2) The compound with the acyl active group is dissolved in ethanol, and then po...

Embodiment 2

[0045] The molar ratio between B76 and MsCl in step 1) of Example 1 was adjusted to 0.5:1, and the rest was the same as in Example 1 to obtain an amphiphilic comb polymer phase-change energy storage material. The obtained amphiphilic comb polymer phase change energy storage material has an endothermic temperature of 35.6°C, a melting enthalpy of 57.9J / g, an exothermic temperature of 33.1°C, a heat-resistant temperature of 255°C, and a yield of 85%.

Embodiment 3

[0047] Adjust the molar ratio between B76 and MsCl in step 1) of Example 1 to be 1:1, and the rest are the same as in Example 1 to obtain an amphiphilic comb polymer phase-change energy storage material. The obtained amphiphilic comb polymer phase change energy storage material has an endothermic temperature of 37.0°C, a melting enthalpy of 64.2J / g, an exothermic temperature of 34.3°C, a heat-resistant temperature of 262°C, and a yield of 95%.

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Abstract

The invention discloses a preparation method of an amphipathic comb-shaped polymer phase change energy storage material. The preparation method comprises the following steps: (1) reacting poly(oxyethylene) alkyl ether or a hydroxyl-containing compound with acyl chloride and an acid-binding catalyst to obtain an acyl active group-containing compound; (2) adding a thioacetate of active metal into an ethanol solution of the acyl active group-containing compound to obtain a crude substitution product, washing the crude substitution product and drying to obtain a substitution product; (3) adding the substitution product into an ethanol solution of sodium ethylate to have a reaction to obtain a sulfhydrylated product; (4) adding the sulfhydrylated product into a polyepichlorohydrin solution to obtain a reaction product, cooling the reaction product, and washing and dialyzing to obtain the amphipathic comb-shaped polymer phase change energy storage material. The preparation method is simple in polymerization process; the prepared amphipathic comb-shaped polymer phase change energy storage material has phase change property and controllable amphipathicity, is relatively high in yield and purity, and does not contain micromolecular matters.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to a preparation method of an amphiphilic comb polymer phase change energy storage material. Background technique [0002] Phase change material (PCM) refers to a class of substances that change their physical properties and provide latent heat as the temperature changes. During the phase change process, the phase change material will absorb or release a large amount of latent heat, while the temperature of the material itself remains unchanged. Due to this characteristic of phase change materials, it can be used as an energy storage, which plays an important role in energy saving and temperature control. [0003] Chinese invention patent (CN101891870A) discloses a method for preparing amphiphilic brush copolymers composed of hydrophobic and pH-responsive groups. In this method, the prepolymer is firstly obtained through the atom transfer radical polymerization process, but t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G65/331C09K5/06
Inventor 石海峰高亚辉王海霞刘伦涛张兴祥
Owner TIANJIN POLYTECHNIC UNIV
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