Phase-transition composite material, preparation method and application thereof

A phase-change composite material and phase-change material technology, applied in the field of external wall insulation or temperature adjustment, and the preparation of phase-change composite materials, can solve problems such as insufficient phase-change energy storage capacity, poor flame-retardant performance, and potential safety hazards

Active Publication Date: 2012-04-11
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame retardant performance of this material is not good. EVA, POE and paraffin are all extremely flammable materials, and there are great safety hazards in building materials.
[0007] Chinese patent application 200810196742.0 discloses "A Flame Retardant Shaped Phase Change Material and Its Preparation Method", in which an intumescent flame retardant and metal powder are added to the phase change material prepared from paraffin wax and HDPE, and the synergistic effect of the two is greatly improved. The flame retardant performance of the material is improved, but the latent heat of phase change is about 70J / g, and the energy storage capacity of phase change is insufficient

Method used

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  • Phase-transition composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Paraffin wax with a melting point of 44° C., ethylene-vinyl acetate copolymer particles with a vinyl acetate monomer unit content of 14% by weight and a melting point of 90° C. as an inorganic filler have a bulk density of 45 kg / m 3 Expanded perlite with a honeycomb structure inside with an average particle size of 3.0mm, graphite as a thermal conductivity enhancer, and a composite flame retardant of magnesium hydroxide and aluminum hydroxide with an average particle size of 200nm (wherein magnesium hydroxide and hydrogen Aluminum oxide accounts for 45% by weight and 55% by weight respectively) and is weighed according to the ratio of 50%, 32%, 10%, 5% and 3%. Adjust the temperature of the temperature-controllable heating furnace at 48±1°C, add paraffin to it to melt into a liquid, remove the paraffin to a mixer, immediately add EVA particles at room temperature to the paraffin, and use a stirrer at 100 rpm Stir at a constant stirring rate for 1-2min, cool to room tempe...

Embodiment 2

[0083] Repeat Example 1, the difference is: EVA is replaced by high density polyethylene, the density of this polymer is 0.956g / cm 3 , the melting point was 130°C, and the melt-blending temperature in the twin-screw extruder was changed to 140°C.

[0084] The test results are shown in Table 1.

Embodiment 3

[0086] Repeat Example 1, except that the paraffin wax is replaced by paraffin wax with a melting point of 38° C., and the temperature of the temperature-controllable heating furnace is adjusted at 42±1° C. accordingly.

[0087] The test results are shown in Table 1.

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Abstract

The invention relates to a phase-transition composite material which comprises: A) 30-65% of phase-transition materials which are low melting point paraffin with a melting point of 25-45 DEG C and / or dodecanol; B) 25-45% of carrier materials which are high density polyethylane and / or ethane-vinylacetate copolymer; C) 5-15% of inorganic fillers which are porous substances and are selected from one or two of expanded perlite and expandable graphite; D) 1-10% of heat-conduction reinforcing agents; and E) 1-10% of fire retardants. The composite material has an appropriate phase transition temperature which matches the building ambient temperature, has great phase transition latent heat, excellent heat-preservation and heat-insulation performance, is fireproof and flame-retardant, is easy to process, and has greatly reduced phase-transition material leakage. The invention also relates to a method for preparing the phase-transition composite material, which comprises the thermal insulation mortar of the phase-transition composite material and a method of heat preservation of a wall by using the mortar.

Description

technical field [0001] The invention relates to a phase change composite material, which can be used as an energy storage building material, especially for external wall insulation or temperature adjustment. The invention also relates to the preparation method and application of the phase change composite material. Background technique [0002] Resources, energy and environmental issues are the three major challenges restricting my country's economic and social development. Building energy consumption (including construction energy consumption, living energy consumption, heating and air conditioning, etc.) is an important part of my country's energy consumption, accounting for about 30% of energy consumption. [0003] Combined with the current situation of thermal insulation materials, the development trend of modern new building thermal insulation materials is: new thermal insulation materials should have good thermal insulation performance, fire and flame retardancy, small...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C04B28/00E04B1/76
CPCY02A30/244
Inventor 丁雪佳张杨欧远辉张雨
Owner BEIJING UNIV OF CHEM TECH
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