Preparation method of photo-thermal seawater desalination film based on tea and photo-thermal seawater desalination film

A photothermal and tea powder technology, applied in chemical instruments and methods, seawater treatment, water/sewage treatment, etc., can solve the problems of membrane material durability, complicated preparation, and low stability

Pending Publication Date: 2021-07-30
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of this type of membrane material is more complicated, and the stability of starch in a humid environmen

Method used

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  • Preparation method of photo-thermal seawater desalination film based on tea and photo-thermal seawater desalination film
  • Preparation method of photo-thermal seawater desalination film based on tea and photo-thermal seawater desalination film
  • Preparation method of photo-thermal seawater desalination film based on tea and photo-thermal seawater desalination film

Examples

Experimental program
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Example Embodiment

[0021] According to a preparation method of a tear-based photothermal seawater, the method comprises the steps of:

[0022] (1) Grinding the tea after drying into tea powder;

[0023] (2) Disperse the tea powder into the solvent to obtain a dispersion;

[0024] (3) The dispersion is vacuum filtered to the filter membrane to obtain a photothermal sea water.

[0025] Among them, the tea can be tea and / or a brown slag after the tea leaves; it is considered to be in an economical point of view, and it is preferred that tea slag after tea is bouled.

[0026] In the embodiment of the present invention, in order to facilitate experiment, tea slag is obtained after brewing tea by inventors, for example by brewing tea, leaching 3-5 times and drying. In industrial, tea slag can, for example, have large quantities of cheaply available tea slags that are commercially available in tea beverages.

[0027] The tea can be a variety of tea available on the market, there is no particular limit on...

Example Embodiment

[0034] Example 1

[0035] (1) Bushing red tea, soak 5 times and dry;

[0036] (2) Place the red tea slag after drying in the ball mill, working for 10 minutes at 500 rpm, to obtain red tea slag tea powder, with an average particle size of 1.2 μm;

[0037] (3) Disperse 10 mg of red tea slag powder into 20 g of distilled water to obtain dispersion;

[0038] (4) The dispersion was filtered to the polytetrafluoroethylene filter, and the filtration time was 30 min to give a photothermal seawater film having a thickness of 5 mm, named E-BT.

Example Embodiment

[0039] Example 2

[0040] (1) Bushing green tea, leaching 5 times and dry;

[0041] (2) Place the dry green tea slag on the ball mill, working for 30 minutes at 800 rpm, and obtained green tea slag tea powder, with an average particle size of 0.6 μm;

[0042] (3) Disperse 6 mg green tea slag powder into 20 g of tetrahydrofuran to give dispersion;

[0043] (4) The dispersion was filtered to a mixed cellulose membrane film, and the filtration time was 70 min to give a photothermal seawater film having a thickness of 2.2 mm, named E-GT.

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Abstract

The invention provides a preparation method of a tea-based photo-thermal seawater desalination film and the photo-thermal seawater desalination film prepared by the method. The method comprises the following steps: (1) drying tea, and grinding into tea powder; (2) dispersing the tea powder into a solvent to obtain a dispersion liquid; and (3) carrying out vacuum filtration on the dispersion liquid to a filter membrane to obtain the photo-thermal seawater desalination membrane. According to the method provided by the invention, the raw materials are cheap and easy to obtain, the membrane preparation operation is simple and convenient, and the prepared membrane material can be recycled for multiple times and has industrial practicability.

Description

technical field [0001] The invention relates to the technical field of photothermal seawater desalination and utilization of biological resources, in particular to a method for preparing a tea-based photothermal seawater desalination film and the photothermal seawater desalination film prepared by the method. Background technique [0002] Solar vapor generation (SVG) is a typical water treatment technology that uses the conversion between sunlight and heat energy to make water molecules turn into water vapor below its evaporation temperature, and has been widely studied[ L. Zhao et al, Joule, 2020, 4, 2733]. However, in the process of water evaporation in the volumetric system, light reflection and thermal diffusion limit the conversion efficiency between the entire light and water vapor, resulting in a low water production rate. With the development of light and heat management technology, nano-scale structure and material design concept, interfacial solar vapor generation...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D61/36C02F1/14C02F1/44C02F103/08
CPCB01D67/0088B01D61/36C02F1/14C02F1/448C02F2103/08Y02A20/131Y02A20/212Y02A20/124Y02A20/142
Inventor 祝祥威金音董志月李雪银张婷蔡冬娜刘睿思
Owner HUBEI UNIV OF TECH
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