Mixed fiber composite phase change temperature control material and preparation method thereof

A technology of phase change temperature control and mixed fiber, which is applied in the field of materials, can solve the problems of high cost and affecting the repeated use of crystalline hydrated salt phase change materials, and achieve the effects of reducing dosage, ensuring cycle stability, and reducing supercooling

Active Publication Date: 2020-07-10
QILU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the actual effect of simply using a thickener is too dependent on thickener concentration, system pH and other conditions, and must be precisely regulated, otherwise it will affect the repeated use of crystalline hydrated salt phase change materials
Patent applications with application numbers: CN106987234A, CN103865494A, etc. proposed the use of microcapsule technology to solve the phase separation and leakage problems of phase change materials, but this method is mostly aimed at organic solid-liquid phase change materials, and its cost is relatively high
[0004] Therefore, at present, there is no good solution to the supercooling and phase separation problems of crystalline hydrated salt inorganic phase change materials. How to improve the service life of this phase change material in an economical and reasonable way has become a challenge for researchers.

Method used

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  • Mixed fiber composite phase change temperature control material and preparation method thereof
  • Mixed fiber composite phase change temperature control material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] Add 3.5 g of starch into 100 mL of purified water, and stir it for 60 min with an overhead stirrer at a speed of 300 r / min to obtain a uniform and viscous starch solution, which is divided into two parts for later use.

[0035] Take 30g of bagasse pulp and 7g of crushed glass fiber wool and slowly add to one of the starch solutions under stirring, then stir at 40°C and 200r / min for 90min to obtain a suspension with uniformly dispersed fibers.

[0036] Then, add 40g of sodium sulfate decahydrate, 12g of ammonium chloride, 5g of borax and 2.5g of chloramine into another starch solution, and stir for 60min at 40°C and 500r / min to obtain a homogeneous solution.

[0037] Finally, the above two solutions were mixed together, and stirred at a speed of 300 r / min for 120 min at 40° C. and 150 W ultrasonic conditions to obtain a phase-change temperature-controlling material composited with mixed fibers. The scanning electron microscope photograph of the sample is as figure 1As s...

Embodiment 2

[0039] Add 6 g of polyvinylpyrrolidone into 100 mL of purified water, and stir it for 60 min at a speed of 500 r / min with an overhead stirrer to obtain a uniform viscous solution, which is divided into two parts for later use.

[0040] Take 35g of waste paper pulp and 8g of crushed rock wool and slowly add it to the polyvinylpyrrolidone solution under stirring, then stir for 90min at 35°C and 200r / min to obtain a suspension with uniformly dispersed fibers.

[0041] Then, add 35g of sodium sulfate decahydrate, 8g of potassium chloride, 6g of barium hydroxide octahydrate and 2g of copper sulfate into another polyvinylpyrrolidone solution, and stir for 60min at 35°C and 500r / min to obtain a homogeneous solution .

[0042] Finally, the above two solutions were mixed together, and stirred at a speed of 500 r / min for 180 min at 35° C. and 200 W ultrasonic conditions to obtain a mixed fiber composite phase change temperature control material. The temperature change of the sample wit...

Embodiment 3

[0044] Add 2 g of polyethylene oxide-polypropylene oxide block copolymer into 100 mL of pure water, and stir it for 60 min at a speed of 200 r / min with an overhead stirrer to obtain a uniform viscous solution, which is divided into two backup.

[0045] Take 25g of waste paper pulp and 10g of crushed rock wool and slowly add it to the block copolymer solution under stirring, then stir at 50°C and 200r / min for 90min to obtain a suspension with uniformly dispersed fibers.

[0046] Then, take 50g of calcium chloride hexahydrate, 4g of magnesium chloride hexahydrate, 8g of nano-silicon dioxide and 1g of isothiazolinone, add another part to the block copolymer solution, and stir for 60min at 50°C and 600r / min , to obtain a homogeneous solution.

[0047] Finally, the above two solutions were mixed together, and stirred at a speed of 400 r / min for 180 min at 50° C. and 100 W ultrasonic conditions to obtain a phase-change temperature-controlling material composited with mixed fibers. ...

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Abstract

The invention provides a mixed fiber composite phase change temperature control material and a preparation method thereof. The material comprises the following raw materials in percentage by mass: 20-40% of plant fiber pulp, 6-10% of inorganic fibers, 30-50% of a phase change energy storage agent, 2-15% of a phase change temperature regulator, 1-10% of a nucleating agent, 2-8% of a thickening stabilizer and 0.5-5% of a preservative. The plant fiber pulp and the inorganic fibers are used for constructing a fiber network, the use of the inorganic fibers is reduced while the supercooling of the phase change agent is reduced and the cycle performance of the temperature control material is improved, the production cost of the material is reduced, and fibers in agricultural and forestry wastes and waste paper are effectively utilized. Besides, the production process is simple, the temperature control effect is good, the material can be widely applied to the fields of building energy conservation and electronic equipment temperature control, and great economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a mixed fiber composite phase change temperature control material and a preparation method thereof. Background technique [0002] Energy is the material basis of human activities. The production and life of modern society cannot be separated from energy for a moment. However, human's unrestrained consumption of natural energy has also led to serious energy shortages and environmental pollution problems. Due to the strong temporal and spatial characteristics of energy supply and demand, there is an inconsistency between energy supply and energy consumption in many energy utilization systems such as building and electronic equipment insulation and cold storage, resulting in energy Unreasonable use and a lot of waste. Therefore, people are eager to find a suitable way to improve the efficiency of energy use, thereby reducing the use of energy. [0003] Phase change materials ha...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 王守娟董晓斌孔凡功韩文佳李国栋孙姣姣
Owner QILU UNIV OF TECH
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