Porous near-infrared reflective insulation material and preparation method thereof

A thermal insulation material and near-infrared technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as insufficient thermal insulation performance, and achieve comprehensive thermal insulation performance, good near-infrared reflection performance, The effect of low thermal conductivity

Inactive Publication Date: 2017-03-15
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the problem in the existing technology is that the heat insulation material only has one heat insulation mechanism, or has a porous structure, or has good near-infrared reflection ability, and fails to make full use of heat-blocking heat insulation materials and heat reflection at the same time. The advantages of the type insulation material, the insulation performance is not good enough

Method used

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  • Porous near-infrared reflective insulation material and preparation method thereof
  • Porous near-infrared reflective insulation material and preparation method thereof
  • Porous near-infrared reflective insulation material and preparation method thereof

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Embodiment Construction

[0035] In order to facilitate those skilled in the art to further understand the present invention, the following examples are prepared according to the same preparation method.

[0036] The raw materials used in each embodiment are all commercially available.

[0037] Preparation:

[0038] First, weigh Zn(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 Dissolve O in an appropriate amount of deionized water, stir at room temperature, transfer the solution to a three-necked flask, heat it in a water bath at 70°C, measure a certain amount of phosphoric acid with a concentration of 85%, and slowly drop it into the three-necked flask, stir, and react for 1h , pour the mixed solution into a beaker, slowly add 2mol / L Na 2 CO 3 solution, stirring while adding dropwise, adjusting the pH value to 7, standing still, precipitation, suction filtration, washing twice with deionized water and once with absolute ethanol, and drying the filter cake in an oven at 70°C for 6h to obtain Precurso...

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Abstract

The invention discloses a porous near-infrared reflective heat insulation material and a preparation method thereof. The material has the following chemical composition: NaZn1-x(Ni)xPO4, wherein x is 0.05-0.25. The preparation method comprises the following steps: dissolving a zinc salt and a nickel salt in deionized water at a ratio and stirring at room temperature to obtain a zinc-nickel solution; heating the zinc-nickel solution in a water bath, stirring, and simultaneously slowly dropwise adding phosphoric acid to obtain a zinc-nickel-phosphorus solution; dissolving sodium carbonate or sodium bicarbonate in water to obtain a sodium solution serving as a precipitation agent; slowly dropwise adding the precipitating agent into the zinc-nickel-phosphorus solution, regulating a pH value, standing still, washing with water, washing with alcohol, and drying to obtain precursor powder; and putting the precursor powder into a muffle furnace, calcining, cooling in the furnace and grinding to obtain the porous near-infrared reflective heat insulation material. The heat insulation material not only has a porous structure, but also has better near-infrared reflectivity, as well as good comprehensive heat insulation performance and broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of heat insulation materials, in particular to a porous near-infrared reflective heat insulation material with both advantages of porous heat insulation and heat reflection heat insulation and a preparation method thereof. Background technique [0002] From the perspective of heat insulation mechanism, heat insulation materials can be divided into two categories: heat blocking heat insulation materials and heat reflection heat insulation materials. [0003] Heat-blocking heat-insulating materials refer to heat-insulating materials that block heat convection. Studies have shown that when heat is transferred in porous materials, it can be divided into two transfer paths: one path is through solids. However, due to the existence of pores, the solid is bent, which prolongs the transfer path and reduces the speed of heat transfer. Another route is delivery in the stomata. Due to the ultra-low thermal conductiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/45
Inventor 韩爱军冯炜叶明泉陈昕刘莉莉
Owner NANJING UNIV OF SCI & TECH
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