Polypyrrole-coated cattail velvet-based ultra-light biomass porous foam and its preparation method and application

A porous foam and cattail-based technology, which is applied in the field of polypyrrole-coated cattail fleece-based ultra-light biomass porous foam and its preparation, can solve the problem of poor salt resistance and evaporation efficiency of airgel-polypyrrole photothermal conversion materials And low energy conversion efficiency, evaporation efficiency decline and other issues, to achieve the effect of contributing to environmental protection and clean energy development, abundant output, and low cost

Active Publication Date: 2022-02-22
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the evaporation rate of the airgel-polypyrrole photothermal conversion material prepared by this method is only 0.42kg / m 2 / h, its evaporation efficiency and energy conversion efficiency are low; and the salt tolerance of the airgel-polypyrrole light-to-heat conversion material is not good, and its evaporation efficiency will further decrease when it is applied in high-salinity seawater, resulting in Its application is limited

Method used

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  • Polypyrrole-coated cattail velvet-based ultra-light biomass porous foam and its preparation method and application
  • Polypyrrole-coated cattail velvet-based ultra-light biomass porous foam and its preparation method and application
  • Polypyrrole-coated cattail velvet-based ultra-light biomass porous foam and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The invention provides a preparation method of polypyrrole-coated cattail velvet base ultra-light biomass porous foam, comprising the following steps:

[0032] S1. Wash the cattail velvet and place it in an alkaline solution for heating in a water bath. After fully removing impurities, it is washed, and then the washed cattail velvet is stirred at a high speed to obtain the pretreated cattail velvet;

[0033] S2, respectively prepare polyvinyl alcohol solution and tannic acid solution of predetermined mass fraction; then add the cattail velvet after the pretreatment that step S1 obtains in the polyvinyl alcohol solution, and obtain cattail velvet / polyethylene after fully stirring Alcohol mixed solution, then the tannic acid solution is added in the cattail velvet / polyvinyl alcohol mixed solution, after fully reacting, carry out freeze-drying, obtain the cattail velvet base ultra-light biomass porous foam;

[0034] S3. Prepare a mixed solution containing an oxidizing age...

Embodiment 1

[0044] This embodiment provides a preparation method of polypyrrole-coated cattail velvet-based ultra-light biomass porous foam, comprising the following steps:

[0045] S1. Take 8g of cattail velvet and wash it repeatedly with distilled water and deionized water to remove impurities. Then prepare a potassium hydroxide solution with a concentration of 5wt% as an alkaline solution, put the washed cattail hair into the alkaline solution, and heat it in a water bath at 60°C for 4 hours to fully dissolve impurities such as hemicellulose and gum in the cattail hair Afterwards, it is washed with distilled water, and then the washed cattail velvet is stirred at a speed of 12000r / min for 8min with a high-speed mixer to shorten the cattail velvet and obtain the pretreated cattail velvet.

[0046] S2. Add 5g of polyvinyl alcohol into water, stir in an oil bath at 90°C for 4 hours to fully dissolve the polyvinyl alcohol, and prepare a polyvinyl alcohol solution with a mass fraction of po...

Embodiment 2～7

[0058] Embodiments 2-7 respectively provide a preparation method of polypyrrole-coated cattail velvet-based ultra-light biomass porous foam. Compared with Example 1, the difference is that the corresponding process parameters in steps S3-S4 are changed, each The parameter values ​​corresponding to the embodiment are shown in Table 1, and the rest of the steps and parameters are consistent with the embodiment 1, and will not be repeated here.

[0059] Process parameter in table 1 embodiment 2~7

[0060]

[0061]

[0062] The evaporation rate of the polypyrrole-coated cattail velvet-based ultralight biomass porous foam prepared in Examples 2-7 was tested, and the results are shown in Table 2.

[0063] Evaporation rate in table 2 embodiment 2~7

[0064] Example evaporation rate Example 2 1.35kg / min Example 3 1.89kg / min Example 4 1.05kg / min Example 5 1.28kg / min Example 6 1.81kg / min Example 7 1.80kg / min

[0065] It c...

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Abstract

The invention provides a polypyrrole-coated cattail velvet-based ultra-light biomass porous foam, a preparation method and application thereof. In the present invention, cattail velvet is subjected to alkali treatment, and then through the cross-linking reaction of tannin and polyvinyl alcohol, the cattail velvet is fixed and does not collapse in water, and it is freeze-dried to prepare cattail velvet-based ultra-light biomass porous foam and then coated with polypyrrole generated by in-situ polymerization to obtain polypyrrole-coated cattail velvet-based ultra-light biomass porous foam. Through the above method, the present invention can make the prepared cattail velvet-based ultra-light biomass porous foam stable and non-collapsing, and has a consistent graded channel, and promotes the effective coating of polypyrrole, thereby effectively improving its salt resistance and enhancing light and heat. Conversion efficiency, polypyrrole-coated cattail velvet-based ultralight biomass porous foam with excellent salt tolerance and high energy conversion efficiency, so that it can be used as a photothermal material in a solar steam generation system.

Description

technical field [0001] The invention relates to the technical field of photothermal materials, in particular to a polypyrrole-coated cattail velvet-based ultralight biomass porous foam and a preparation method and application thereof. Background technique [0002] The rapid development of modern industry and the huge consumption of fossil energy have led to several serious problems such as energy crisis, global warming, and environmental pollution. Among them, the severe shortage of fresh water caused by industrial pollution is considered to be one of the bottlenecks that severely restricts the sustainable development of society, especially in those underdeveloped regions and countries. Therefore, the production of fresh water using renewable and green energy sources is of particular importance. [0003] In recent years, the production of fresh water by solar steam power has attracted a lot of commercial and academic attention. Compared with the traditional nanofiltration ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L29/04C08K5/1545C08J9/28C08J9/36C08G73/06C02F1/14C02F103/08
CPCC08J9/28C08J9/365C08J9/0061C08G73/0611C02F1/14C02F1/043C02F2103/08C08J2397/02C08J2429/04C08K5/1545C08J2479/04C08J2201/0484Y02A20/212
Inventor 许杰孙艳范玲玲彭松林杨源柏自奎
Owner WUHAN TEXTILE UNIV
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