Paraffin-attapulgite composite phase-change material and preparation method thereof

A technology of composite phase change material and attapulgite, which is applied in the field of paraffin-attapulgite composite phase change material and its preparation, can solve the problems of low phase change enthalpy, complicated preparation methods, and low phase change enthalpy, and achieve high Thermal conductivity and phase change enthalpy, practical value for wide application, effect of improving adsorption performance

Inactive Publication Date: 2015-04-29
盱眙凹土能源环保材料研发中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thermal conductivity of paraffin-based organic phase-change energy storage materials is low, and the phase-change materials are easy to leak from the matrix, which also limits its application range, so in practice, it must be considered to enhance its packaging and heat transfer
Chinese patent application 103694963A discloses a method of using porous and graphitized carbon microspheres as a carrier to improve the thermal conductivity of paraffin composite phase change materials. The paraffin composite phase change material obtained by this method has a higher thermal conductivity, but the carrier is not The low adsorption amount of paraffin leads to the small phase change enthalpy of the phase change material, and the preparation method is complicated and cumbersome, which needs further improvement
Chinese patent application 102127395 A uses the melting method to prepare microcapsule phase change materials, which solves the technical problems of low paraffin wax incorporation, poor energy storage performance, easy leakage, and poor stability. Problems such as low thermal conductivity of materials
Chinese patent application 102531506 A obtains a composite phase change material by stirring and mixing a porous matrix and a paraffin phase change material. This method overcomes the shortcomings of macroscopic container packaging, microscopic capsule packaging, and microscopic cross-linking packaging, which have complex processes and expensive materials. , but the low thermal conductivity still limits the wide application of this material
Chinese patent application 101348626A provides a method for preparing an organic-inorganic compo

Method used

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  • Paraffin-attapulgite composite phase-change material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] Mix attapulgite and water at a solid-to-liquid ratio of 1g: 5mL, stir thoroughly at 60°C for 1 hour, filter with suction, dry, crush and sieve to obtain 200-mesh rinsed attapulgite; rinse attapulgite with 5wt% The sulfuric acid solution was mixed according to the solid-to-liquid ratio of 1g: 3mL, stirred at 70°C for 6h, after the completion, the obtained slurry was filtered, washed until neutral, dried, crushed and sieved to obtain 200-mesh acidified attapulgite; Mix the rinsed attapulgite and water at a solid-to-liquid ratio of 1g: 5mL, stir and heat to 60°C, then add cetyltrimethylammonium bromide, whose mass is 5% of the mass of the rinsed attapulgite, stir After reacting for 2 hours, the resulting slurry was filtered, washed, dried, pulverized and sieved to obtain 200-mesh organic attapulgite.

[0031] Take 50g rinsed attapulgite, 50g acidified attapulgite, 50g organic attapulgite, and 0.5g Al 2 o 3 Mix evenly, add 100g of melted C17 alkane phase-change paraffin, ...

Embodiment 2

[0033] Referring to Example 1, the difference is: prepare rinsed attapulgite, attapulgite and water at a solid-to-liquid ratio of 1g: 8mL, stir at 80°C for 2h; prepare acidified soil, rinse attapulgite and 12wt% hydrochloric acid solution by The ratio is 1g: 6mL, stirring at 90°C for 5h; prepare organic attapulgite, acidified attapulgite and water according to the solid-liquid ratio of 1g: 12mL, the mass of octadecyltrimethylammonium bromide is the mass of acidified attapulgite 15wt%, stirred at 70°C for 5h; to prepare a composite phase change material, take 80g of rinsed attapulgite, 80g of acidified attapulgite, 80g of organic attapulgite, and mix evenly with 6g of foamed aluminum and 6g of expanded graphite, and add 120g of molten 48 No. phase-change paraffin, adsorbed at 60°C for 5h.

Embodiment 3

[0035] Referring to Example 1, the difference is: prepare rinsed attapulgite, attapulgite and water at a solid-to-liquid ratio of 1g:10mL, stir at 80°C for 2.5h; prepare acidified soil, rinse attapulgite and 25wt% nitric acid solution by solid The liquid ratio is 1g: 10mL, and stirred at 140°C for 3 hours; prepare organic attapulgite, acidified attapulgite and water according to the solid-liquid ratio of 1g: 15mL, the mass of cetyl dimethyl benzyl ammonium bromide is acidified attapulgite 20wt% of the mass of the soil, stirred at 80°C for 4 hours; to prepare a composite phase change material, take 100g of rinsed attapulgite, 100g of acidified attapulgite, 100g of organic attapulgite, and 10g of organic attapulgite, and mix them evenly with 10g of foamed copper, and add 150g of melted No. 50 Phase change paraffin, adsorption at 60°C for 5h.

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Abstract

The invention discloses a preparation method of a paraffin-attapulgite composite phase-change material. The method comprises the following steps: rinsing, acidifying, and carrying out organic modified treatment on attapulgite; mixing the treated attapulgite with an inorganic material evenly; and finally adding fused phase-change paraffin, so as to obtain the paraffin-attapulgite composite phase-change material through an impregnation method. The composite phase-change material prepared by the method has high heat-conducting coefficient and phase-change enthalpy value; the preparation method is simple, economical and environmental friendly; the problem of low phase-change enthalpy value caused by low paraffin adsorbing capacity of a paraffin-based phase-change material at present is solved; in addition, the phase-change material with a controllable phase-change temperature is obtained by blending the mass ratio of phase-change paraffin with different brands; application of the paraffin-based composite phase-change material in the field of energy-saving and energy-storage materials is further expanded; and the preparation method has good economic benefits and a broad application prospect.

Description

Technical field: [0001] The invention relates to the field of energy-saving energy storage materials, in particular to a paraffin-attapulgite composite phase change material and a preparation method thereof. Background technique: [0002] With the advancement of the industrialization process of developed countries in the 20th century, the continuous economic development has led to a large consumption of energy resources, and the human demand for energy has become increasingly urgent. Since the 1970s, the energy crisis and environmental pollution caused by the massive consumption of traditional energy have made people gradually pay attention to improving energy utilization efficiency and developing new energy sources with high efficiency, energy saving and renewable energy, such as vigorously Develop new energy sources such as wind energy, solar energy, and geothermal energy. The development and application of heat storage technology has become one of the important means to ...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 陈新德杨丹张海荣郭海军熊莲施丝兰王波黄超
Owner 盱眙凹土能源环保材料研发中心
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