Preparation method of hydrated inorganic salt-expanded vermiculite-paraffin-PAM composite phase change energy storage material

A technology of hydrated inorganic salt and expanded vermiculite, which is applied in the direction of heat exchange materials, chemical instruments and methods, and can solve problems such as limited application and supercooling

Active Publication Date: 2020-11-17
TARIM UNIV
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Problems solved by technology

But at the same time, hydrated inorganic salts tend to be supercooled du

Method used

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  • Preparation method of hydrated inorganic salt-expanded vermiculite-paraffin-PAM composite phase change energy storage material
  • Preparation method of hydrated inorganic salt-expanded vermiculite-paraffin-PAM composite phase change energy storage material
  • Preparation method of hydrated inorganic salt-expanded vermiculite-paraffin-PAM composite phase change energy storage material

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[0053] In the previous research, the method of adding expanded vermiculite to paraffin / PAM emulsion to prepare expanded vermiculite-paraffin-PAM fixed phase change energy storage material has been optimized. The lamellar expanded vermiculite effectively reduces the leakage of paraffin , improved the effective utilization rate of paraffin; when the amount of expanded vermiculite added was 0.50g, the encapsulation efficiency of paraffin reached the maximum, which was 71.05%. g, the amount of paraffin encapsulated is 6.88g, and the effective utilization rate of paraffin is 76.44%. But at the same time, it is also found that expanded vermiculite has a layered structure on the microscopic level, and the energy storage density of expanded vermiculite-paraffin / PAM shape-changing materials can be continuously improved by "filling" other phase change materials between its sheets. .

[0054] On the basis of previous research, this application uses expanded vermiculite as a relatively h...

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Abstract

The invention discloses a preparation method of a hydrated inorganic salt expanded vermiculite paraffin PAM composite phase change energy storage material. The preparation method comprises the following steps: (1) preparing hydrated inorganic salt/expanded vermiculite by a physical impregnation method; (2) preparing a paraffin/PAM emulsion; (3) adding the hydrated inorganic salt/expanded vermiculite into the paraffin/PAM emulsion to prepare the hydrated inorganic salt/expanded vermiculite with addition of the hydrated inorganic salt/expanded vermiculite paraffin/PAM shape-stabilized phase change energy storage material. The invention effectively reduces the leakage of paraffin as well, improves the encapsulation efficiency of paraffin, and further improves the phase change latent heat of the material due to the existence of the hydrated inorganic salt; more importantly, the hydrated inorganic salt is compounded into the body of the paraffin/PAM shape-stabilized phase change material, so that the supercooling degree of the hydrated inorganic salt is effectively reduced. Test results show that the composite phase change material has high latent heat of phase change, good thermal stability and cycling stability, and good application prospect.

Description

technical field [0001] The invention relates to the technical field of organic-inorganic composite energy storage materials. Specifically, it is a preparation method of a hydrated inorganic salt-expanded vermiculite-paraffin-PAM composite phase change energy storage material. Background technique [0002] As an energy-saving material, phase change materials can store and release energy during the phase change process, effectively reduce building energy consumption, and improve indoor comfort, so they have attracted more attention. As a common organic solid-liquid phase change material, paraffin has the advantages of high latent heat of phase change, wide phase change temperature, stable properties and low price, and has been widely used in many fields. Since paraffin wax has a liquid phase during the phase change process, it is usually necessary to encapsulate it with an encapsulation material to make a fixed phase change material to prevent its leakage. Expanded vermiculi...

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 吕喜风密建国赵顺苑正己张璐祥田维亮王航张璐瑶
Owner TARIM UNIV
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