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CNF-based homologous heterogeneous photo-thermal material for seawater desalination and preparation method thereof

A heterogeneous, photothermal technology, applied in chemical instruments and methods, seawater treatment, general water supply conservation, etc., can solve problems such as incompatibility, poor interface bonding performance, etc., to achieve abundant raw materials, pollution-free, high-efficiency photothermal conversion and desalination of seawater

Active Publication Date: 2020-05-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the technical problems existing in the prior art, the present invention provides a CNF-based homogeneous heterogeneous photothermal material for desalination of seawater and its preparation method to solve the problem of incompatibility of existing photothermal materials due to the use of different materials. Sexuality, leading to technical problems of poor interface bonding performance

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  • CNF-based homologous heterogeneous photo-thermal material for seawater desalination and preparation method thereof
  • CNF-based homologous heterogeneous photo-thermal material for seawater desalination and preparation method thereof

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preparation example Construction

[0024] The invention provides a preparation method of a CNF-based homogeneous heterogeneous photothermal material for seawater desalination, comprising the following steps:

[0025] Step 1, mixing nanocellulose, adhesive, cell regulator and water to prepare a mixed suspension; wherein, the contents of each component in the mixed suspension are: nanocellulose: 1-20wt%, glue Adhesive: 1-20wt%, cell regulator: 1-20wt%, and water: the rest, the total content of the above components is 100wt%;

[0026] Step 2. Foaming the mixed suspension by physical foaming to obtain a nanocellulose wet foam system; specifically, stirring the mixed suspension to allow air to enter the mixed suspension to form a nanocellulose wet foam system ;

[0027] Step 3. Perform directional freezing and drying on the nanocellulose wet foam system to obtain a nanocellulose-based foam material; wherein, the directional freezing time is 1 to 20 hours, and the freezing temperature is -80°C to -18°C; the drying p...

Embodiment 1

[0033] Embodiment 1 provides a preparation method of a CNF-based homogeneous heterogeneous photothermal material for seawater desalination, comprising the following steps:

[0034] Step 1. Mix nanocellulose, adhesive, cell regulator and water to prepare a mixed suspension; the contents of each component in the mixed suspension are: nanocellulose: 1wt%, adhesive : 20wt%, cell regulator: 20wt% and the balance of water, the total content of the above components is 100wt%;

[0035] Step 2, stirring the mixed suspension so that a large amount of air enters the mixed suspension to form a foam to obtain a nanocellulose wet foam system;

[0036] Step 3. Perform directional freezing and drying on the nanocellulose wet foam system to obtain a nanocellulose-based foam material; wherein, the directional freezing time is 1 hour, and the freezing temperature is -18° C.; the drying process is freeze-drying, and the freeze-drying time is 100 hours , the freeze-drying temperature is -50°C;

...

Embodiment 2

[0041] Embodiment 2 provides a preparation method of a CNF-based homogeneous heterogeneous photothermal material for seawater desalination, comprising the following steps:

[0042] Step 1. Mix nanocellulose, adhesive, cell regulator and water to prepare a mixed suspension; the contents of each component in the mixed suspension are: nanocellulose: 10wt%, adhesive : 1wt%, cell regulator: 20wt% and the rest of water, the total content of the above components is 100wt%;

[0043] Step 2, stirring the mixed suspension so that a large amount of air enters the mixed suspension to form a foam to obtain a nanocellulose wet foam system;

[0044] Step 3. Perform directional freezing and drying on the nanocellulose wet foam system to obtain a nanocellulose-based foam material; wherein, the directional freezing time is 20 hours, and the freezing temperature is -80°C; the drying process is freeze-drying, and the freeze-drying time is 10 hours , the freeze-drying temperature is -60°C;

[00...

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Abstract

The invention discloses a CNF-based homologous heterogeneous photo-thermal material for seawater desalination and a preparation method of the CNF-based homologous heterogeneous photo-thermal material.The preparation method comprises the following steps: mixing nanocellulose, an adhesive, a cell regulator and water to prepare a mixed suspension; carrying out foaming treatment on the mixed suspension to obtain a nanocellulose wet foam system, and carrying out directional freezing and drying on the nanocellulose wet foam system to obtain a nanocellulose-based foam material; and carrying out carbonization treatment on a certain surface of the nanocellulose-based foam material subjected to oxygen isolation treatment to obtain the CNF-based homologous heterogeneous photo-thermal material for seawater desalination. According to the preparation method, nanocellulose is used as a raw material, an adhesive is used as an auxiliary material, a foam material is prepared in a foaming manner, and then surface carbonization is performed. Wide-spectrum efficient light absorption and rapid steam overflow are achieved through the carbonized upper-layer surface, water supply and heat insulation are achieved through the lower-layer porous structure, the light absorption layer and the carrier layer are in natural transition and are integrally formed, and no real interface exists. The raw materialsare rich and pollution-free, and have biodegradability.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency utilization of solar energy, and in particular relates to a CNF-based homologous heterogeneous photothermal material for seawater desalination and a preparation method thereof. Background technique [0002] Solar energy is an inexhaustible and inexhaustible green and clean energy, among which the light-to-heat conversion of solar energy is the most effective and easiest way to utilize it. Due to the shortage and serious pollution of fresh water resources, it is imperative to use solar energy for photothermal conversion to evaporate seawater to obtain fresh water. At present, photothermal materials with upper light absorption, lower water transport and heat insulation are research hotspots in this field. Most of the existing photothermal materials are composites of two or more materials. Due to the incompatibility of different materials Sex-induced interface binding is a key issue to be re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C02F103/08
CPCC02F1/14C02F2103/08Y02A20/142Y02A20/212Y02A20/124
Inventor 李金宝杨雪修慧娟崔雨馨冯盼马飞燕谢竺航薛白亮岳小鹏
Owner SHAANXI UNIV OF SCI & TECH
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