Preparation method and application of photo-thermal interface evaporation material under transient normal stress action

A normal stress, photothermal technology, applied in chemical instruments and methods, general water supply saving, coating, etc., can solve the problems of lack of preparation methods for photothermal interface evaporation materials, and achieve excellent photothermal evaporation rate and efficiency, high light Heat conversion efficiency, efficient and uniform dispersion effect

Active Publication Date: 2022-04-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The carbon nanotube / microcrystalline cellulose composite membrane obtained by this technical scheme has excellent amphiphilic wettability, but there is still room for improvement in terms of optical and thermodynamic properties.
[0006] As mentioned in the review, the prior art still lacks a method for preparing photothermal interface evaporation materials with excellent optical and thermodynamic properties, low cost, and large-scale promotion and application.

Method used

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  • Preparation method and application of photo-thermal interface evaporation material under transient normal stress action
  • Preparation method and application of photo-thermal interface evaporation material under transient normal stress action
  • Preparation method and application of photo-thermal interface evaporation material under transient normal stress action

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Effect test

Embodiment

[0043] A method for preparing a photothermal interface evaporation material under the action of transient normal stress, such as figure 1 shown, including the following steps:

[0044] (1) PE, NaCl and GNs are pre-mixed in a high-speed mixer at a mass ratio of 20:80:2, and then fed into a single-shaft eccentric rotor extruder through a feeder, and the rotor drives multiphase in the inner cavity of the stator The system makes the positive displacement pulsation continuous plastic blending with the velocity gradient vector approaching the flow direction, and the alternating action of volume compression and release deformation forces the continuous dynamic generation and evolution of the micro-interface in the multi-phase system, resulting in the refined high-content NaCl being GNs The filled PE matrix is ​​coated to form a PE / NaCl / GNs composite material with a co-continuous microstructure. The schematic diagram of the preparation principle is shown in figure 2 shown;

[0045]...

Embodiment 2

[0051] A method for preparing a photothermal interface evaporation material under the action of transient normal stress, comprising the following steps:

[0052] (1) PE, NaCl and CNTs are pre-blended according to the weight ratio of 20:80:1.6, and then fed into the uniaxial eccentric rotor extruder through the feeder. The rotor drives the multiphase system in the inner cavity of the stator to make a speed gradient The positive displacement pulsation continuous plastic blending with the vector approaching the flow direction, the alternating volume compression and release deformation force the continuous dynamic generation and evolution of the micro-interface in the multiphase system, resulting in the refined high-content NaCl particles8 being filled with CNTs The PE matrix 9 is coated to form a PE / NaCl / CNTs composite material with a co-continuous microstructure, and the composite material is continuously extruded through a rod die to form a product ( Image 6 );

[0053] (2) A...

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Abstract

The invention belongs to the technical field of solar interface evaporation, and particularly relates to a preparation method and application of a photo-thermal interface evaporation material with a transient normal stress effect. The preparation method comprises the following steps: (1) uniformly mixing a polymer matrix, a water-soluble template and a photo-thermal functional filler to obtain a multi-phase system, and carrying out volume periodic compression and release on the multi-phase system to form a composite material with a co-continuous microstructure; (2) loading a modified nano material on the surface of the composite material with the co-continuous microstructure; and (3) immersing the composite material loaded with the modified nano material into water to remove the water-soluble template. According to the method, large-scale, continuous and green preparation of the self-floating polymer-based photo-thermal interface evaporation material can be achieved, the forming processing technology is simple, the material and production cost is low, large-scale application and popularization can be achieved, and the wide market prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of solar energy interface evaporation, and in particular relates to a preparation method and application of a photothermal interface evaporation material under the action of transient normal stress. Background technique [0002] Freshwater resources play an indispensable role in the life process of all organisms on the earth. However, the excessive consumption of freshwater resources, the increasing pollution of ecosystems and the climate change of global warming make human beings face an unprecedented freshwater crisis. Producing more fresh water in an efficient and economical manner is crucial for the sustainable development of human society. As two of the most abundant resources on earth, solar energy and seawater, generating solar steam from seawater or wastewater is currently one of the most promising and green sustainable solutions to address the global freshwater shortage. Completely different from t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K3/04C08J9/26C08J7/06C02F1/14C02F103/08
CPCY02A20/212
Inventor 瞿金平吴婷谢恒
Owner HUAZHONG UNIV OF SCI & TECH
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