Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of phase change thermal storage wood-plastic composite material and preparation method thereof

A wood-plastic composite material and composite material technology, applied in the field of phase-change thermal storage wood-plastic composite material and its preparation, can solve the problems of poor thermal conductivity and affecting heat transfer, and achieve low cost, energy saving, and leakage prevention. Effect

Active Publication Date: 2019-02-22
BEIJING FORESTRY UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of adding phase change materials in the prior art is relatively simple, just use specially manufactured wood-plastic profiles with hollow or groove structures to simply fill the phase change materials, which not only puts forward relatively new requirements for the preparation of wood-plastic composite materials. High requirements, while simple filling leads to poor thermal conductivity of the material, which affects heat transfer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of phase change thermal storage wood-plastic composite material and preparation method thereof
  • A kind of phase change thermal storage wood-plastic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This example provides a phase-change thermal storage wood-plastic composite material, which is prepared from the following ingredients: 5g of expanded graphite powder with a mesh size of 20-40, 50g of phase-change paraffin wax with a phase change temperature of 22-28°C, 60- 80 mesh poplar wood powder 95g, 180-200 mesh high-density polyethylene powder 140g.

[0033] This embodiment further provides a preparation method of the phase change thermal storage wood-plastic composite material, specifically:

[0034] (1) The expanded graphite is put into the conical flask to evacuate, the paraffin is continuously added in the conical flask and constantly stirred, so that the expanded graphite can fully absorb the molten paraffin;

[0035] (2) Dry the wood powder to absolute dryness, place the high-density polyethylene and the prepared phase-change material in a high-speed mixer and mix evenly at high speed; send the mixture into the extruder, and the screw speed is 180 rpm, The...

Embodiment 2

[0039] This example provides a phase change thermal storage wood-plastic composite material, which is prepared from the following ingredients: 10 g of expanded vermiculite with a mesh size of 20 to 40, 30 g of n-dodecanol with a phase transition temperature of 22 to 28°C, 80g of poplar wood powder of 60-80 mesh, 150g of high-density polyethylene of 80-200 mesh.

[0040] This embodiment further provides a preparation method of the phase change thermal storage wood-plastic composite material, specifically:

[0041](1) The expanded vermiculite is put into the conical flask to evacuate, n-dodecanol is continuously added in the conical flask and constantly stirred, so that the vermiculite can fully absorb the dodecanol;

[0042] (2) Dry the wood powder to absolute dryness, place the high-density polyethylene and the prepared phase change material in a high-speed mixer and mix evenly at high speed; the mixture is sent into the extruder, and the screw speed is 180 rpm, The temperatu...

Embodiment 3

[0045] This example provides a phase-change thermal storage wood-plastic composite material, which is prepared from the following ingredients: 15g of diatomite with a mesh size of 20-40, 15g of octadecane with a phase-change temperature of 22-28°C, 60- 80-mesh poplar wood powder 95g, 180-200-mesh high-density polyethylene 135g.

[0046] This embodiment further provides a preparation method of the phase change thermal storage wood-plastic composite material, specifically:

[0047] (1) Diatomaceous earth is put into conical flask to evacuate, and octadecane is continuously added in conical flask and constantly stirred, and diatomite fully absorbs octadecane;

[0048] (2) Dry the wood powder to absolute dryness, place the high-density polyethylene and the prepared phase change material in a high-speed mixer and mix evenly at high speed; the mixture is sent into the extruder, and the screw speed is 180 rpm, The temperatures in the five intervals are 140, 160, 160, 160 and 115°C r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
phase transition temperatureaaaaaaaaaa
particle size (mesh)aaaaaaaaaa
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention relates to a phase-change heat-storage wood-plastic composite. The phase-change heat-storage wood-plastic composite is prepared from the following raw materials by weight: 25 to 40% of the powder of a wood fiber material, 45 to 60% of the powder of a polymer material, 5 to 25% of a phase-change material and 1 to 10% of the powder of a porous material. The invention furthers provide a preparation method for the phase-change heat-storage wood-plastic composite. The preparation method comprises the following steps: (1) fully mixing the powder of the porous material and the molten phase-change material through stirring under vacuum condition so as to obtain a shaped phase-change material; (2) fully mixing the shaped phase-change material with the dried powder of the wood fiber material and the powder of the polymer material under stirring so as to obtain a mixed material; and (3) subjecting the mixed material to extrusion, compaction and shaping so as to obtain the wood-plastic composite. The preparation method for the wood-plastic composite is simple in process and low in cost; and the prepared wood-plastic composite has good heat storage performance, can be used as a green recyclable material for adjusting indoor temperature and exerts energy saving effect.

Description

technical field [0001] The invention relates to the fields of phase change materials and wood-plastic composite materials, in particular to a phase-change thermal storage wood-plastic composite material and a preparation method thereof. Background technique [0002] Due to the ability to absorb or release a large amount of heat during the phase change process, phase change materials have been widely used in the field of building energy conservation. At present, the most common phase change materials include organic materials such as paraffin, n-dodecyl alcohol and stearic acid. They have the advantages of non-corrosion, stable chemical properties, and large latent heat of phase change, but there are also large volume changes and problems during the phase change process. Disadvantages such as easy leakage have greatly affected its practical application. [0003] In order to solve the leakage problem, the most common method in the prior art is to adopt microcapsule coating, p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L97/02C08L91/06C08K9/12C08K7/24C08K5/03C08K7/26C08K5/01B29C48/92B29C43/58
CPCB29C43/58B29C48/92B29C2043/5816B29C2948/92704C08L23/06C08L2205/16C08L2207/062C08L97/02C08L91/06C08K9/12C08K7/24C08K5/03C08K7/26C08K5/01
Inventor 曹金珍郭玺王望
Owner BEIJING FORESTRY UNIVERSITY