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Self-floating thermal insulation water-guiding material and preparation method and application thereof

A thermal insulation material, selected technology, applied in chemical instruments and methods, seawater treatment, water/sewage treatment, etc., can solve the problems of low mechanical strength, large-scale application gap, complex preparation process, etc., and achieve improved photothermal evaporation Excellent efficiency and mechanical strength

Active Publication Date: 2019-05-07
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of these materials is complicated, and the mechanical strength is low, and there is still a big gap from large-scale application.

Method used

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  • Self-floating thermal insulation water-guiding material and preparation method and application thereof
  • Self-floating thermal insulation water-guiding material and preparation method and application thereof
  • Self-floating thermal insulation water-guiding material and preparation method and application thereof

Examples

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preparation example Construction

[0076] The invention provides a preparation method of heat-insulating and water-conducting material, which comprises the following steps:

[0077] (1) mixing the crosslinking agent with the polyvinylpyrrolidone to obtain a mixed powder;

[0078] (2) dissolving the mixed powder described in step (1) in an organic solvent to obtain a casting solution;

[0079] (3) adding the casting solution described in step (2) into the heat insulating material to obtain the slurry;

[0080] (4) Pressing the slurry described in step (3), and then performing phase inversion to obtain a heat-insulating and water-conducting material.

[0081] In a preferred embodiment of the present invention, wherein the organic solvent is selected from one or more of N,N-dimethylacetamide, acetone and N,N-dimethylformamide .

[0082] In a more preferred embodiment of the present invention, wherein, the mass ratio of the crosslinking agent to the organic solvent is 5-25:100, preferably 8-24:100, more preferab...

Embodiment 1

[0104] Embodiment 1 Preparation of heat-insulating and water-conducting material

[0105] (1) 8g polyvinylidene fluoride (PVDF) and 1g polyvinylpyrrolidone (PVP) are mixed uniformly to obtain mixed powder;

[0106] (2) Uniformly disperse the mixed powder described in step (1) in 49 g of N,N-dimethylacetamide (DMAc), stir to dissolve, mix for 12 hours, ultrasonicate for 30 minutes, and stand for 48 hours for defoaming to obtain yellow Transparent casting fluid.

[0107] (3) Weigh 3g of hollow glass microspheres (average particle size 55 μm), add 10mL of the casting solution described in step (3) into the hollow glass microsphere powder, stir evenly with a glass rod, and use a pestle to Repeatedly beat and knead to obtain a viscous dough-like slurry;

[0108] (4) Pour the above slurry into a pre-prepared mold (5*4*0.6cm), press it under a pressure of 2MPa and keep it for 5min, take it out, transfer it into a constant temperature water 30°C water bath to undergo a phase inversi...

Embodiment 2

[0113] Example 2 Preparation of a simple light-to-heat conversion device

[0114] The self-floating thermal insulation and water-conducting material prepared in Example 1 floats on the water surface, and a layer of light-to-heat conversion film (which is made by dispersing carbon black in cellulose acetate N,N-dimethylethyl ether) is pasted on the water surface. amide solution, scrape coating or spin coating, and phase inversion in water) to obtain a complete light-to-heat conversion device. The schematic diagram of the light-to-heat conversion device is shown in image 3 As shown, its composition mainly includes four components: an open container, the water contained in it, a self-floating heat-insulating and water-conducting material, and a light-to-heat conversion film.

[0115] The simple photothermal conversion device obtained in embodiment two is carried out the mensuration of following performance:

[0116] 1) Test of light-to-heat conversion performance

[0117] Use...

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Abstract

The invention relates to a self-floating thermal insulation water-guiding material and a preparation method and application thereof. The thermal insulation water-guiding material comprises a crosslinking agent, polyvinylpyrrolidone and a heat-insulating material. The invention also provides a preparation method of the thermal insulation water-guiding material, and the preparation method comprisesthe steps: (1) mixing the crosslinking agent with the polyvinylpyrrolidone so as to obtain mixed powder; (2) dissolving the mixed powder in an organic solvent so as to obtain a casting liquid; (3) adding the casting liquid to the heat-insulating material so as to obtain slurry; and (4) pressing the slurry, and then performing phase transformation so as to obtain the thermal insulation water-guiding material. According to the self-floating thermal insulation water-guiding material, the thermal insulation property of the heat-insulating material, gap among the cross-linking agent and the water-guiding property of a polymer network are combined fully, and the performance of heat insulation and water diversion is integrated, so that the photothermal evaporation efficiency of a photothermal conversion material is effectively improved, and sufficient mechanical strength and excellent recyclability are achieved.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a self-floating heat-insulating and water-conducting material and its preparation method and application. Background technique [0002] With the development of human society, the shortage of water resources has increasingly become one of the global environmental problems. The double dilemma of water quantity and water quality is threatening nearly 4 billion people in the world and restricting the development of human society, especially in areas with underdeveloped social economy and lack of natural resources. Therefore, in the face of the global energy crisis, it is an urgent need to explore a low-energy, easy-to-popular water purification method. The natural cycle of water is a common natural phenomenon, which includes the most widely occurring water purification process, and solar water is the fundamental driving force of the natural cycle. Light-to-heat conversi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L39/06C08K7/28C02F1/14C02F103/08
CPCY02A20/124Y02A20/142Y02A20/212
Inventor 曲久辉张唯吉庆华刘会娟刘锐平胡承志
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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