Shape memory type composite aerogel for inhibiting biological fouling as well as preparation method and application of shape memory type composite aerogel

A composite airgel and biofouling technology, which is applied in the field of preparation, shape-memory inhibition of biofouling, and composite aerogels, can solve the problems of not having the ability to inhibit biofouling, and achieve long-term structural stability and good Antibacterial and anti-biofouling properties, good recyclability

Active Publication Date: 2022-07-01
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The purpose of the present invention is to solve the problem that most existing solar water evaporation devices do not have the ability to inhibit biofouling and resist external force damage to the structure, providing a shape Memory-type composite airgel for inhibiting biofouling, preparation method and application thereof

Method used

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  • Shape memory type composite aerogel for inhibiting biological fouling as well as preparation method and application of shape memory type composite aerogel
  • Shape memory type composite aerogel for inhibiting biological fouling as well as preparation method and application of shape memory type composite aerogel
  • Shape memory type composite aerogel for inhibiting biological fouling as well as preparation method and application of shape memory type composite aerogel

Examples

Experimental program
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Effect test

Embodiment 1

[0047] The present embodiment prepares biomimetic chitosan aerogel (CS aerogel), and the concrete steps are as follows:

[0048] (1) Take 2g of chitosan powder and evenly mix it into 99mL of deionized water and 1mL of acetic acid, and stir overnight to obtain a 2% chitosan solution;

[0049] (2) The chitosan solution is oriented and frozen with liquid nitrogen, and then freeze-dried to obtain the initial chitosan aerogel, with a freezing time of 30 minutes and a freeze-drying time of 48 hours;

[0050] (3) The initial chitosan aerogel was soaked in methanol solution and tert-butanol solution containing sodium hydroxide to wash, then frozen with liquid nitrogen, and then freeze-dried to obtain biomimetic chitosan aerogel.

[0051] figure 1 From the scanning electron microscope photos and real photos of the chitosan aerogel in the horizontal and vertical directions in this example, we found that the chitosan aerogel has an oriented pore structure in the longitudinal direction a...

Embodiment 2

[0053] The present embodiment prepares chitosan iron tannate composite aerogel (CST aerogel), and the concrete steps are as follows:

[0054] (1) Preparation of tannic acid-Tris buffer solution: dissolve 0.2 g of tannic acid powder in 100 mL of Tris-HCl buffer solution (pH=8.5), and ultrasonicate for 10 minutes to obtain tannic acid-Tris buffer solution;

[0055] (2) Preparation of tannic acid-aminopropyltriethoxysilane (TA-APTES) solution: dissolve 0.2 g of APTES in 20 mL of absolute ethanol, then slowly add it to the tannic acid buffer, mix well to obtain ( TA-APTES) solution;

[0056] (3) immersing the chitosan aerogel in the TA-APTES solution, performing 6 compression-release cycles in the solution, and then lyophilizing it after washing to obtain a biomimetic chitosan tannin aerogel;

[0057] (4) Immerse the top of the chitosan tannic acid aerogel in 0.2% ferric sulfate solution, and chelate and coordinate tannic acid and iron ions for 0.5 h to make the top dark black, w...

Embodiment 3

[0074]The present embodiment prepares chitosan / iron tannin aerogel (CS-TF aerogel), and the concrete steps are as follows:

[0075] (1) Preparation of tannic acid-Tris buffer solution: dissolve 0.2 g of tannic acid powder in 100 mL of Tris-HCl buffer solution (pH=8.5) to obtain tannic acid-Tris buffer solution;

[0076] (2) Preparation of tannic acid-aminopropyl triethoxysilane (TA-APTES) solution: dissolve 0.2 g of APTES in 20 mL of absolute ethanol, then slowly add it to the tannic acid buffer, mix well to obtain ( TA-APTES) solution;

[0077] (3) Immerse the top of the chitosan aerogel in TA-APTES solution, so that the top is adsorbed with tannic acid, the lower layer is kept as chitosan aerogel, and then the upper surface TA layer is immersed in 0.2% ferric sulfate Coordinate in the solution for 0.5h to make the tannic acid on the upper surface and Fe 3+ Chelation coordination results in a photothermal layer. Finally, it was washed with deionized water and freeze-dried ...

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Abstract

The invention relates to the technical field of nano materials, in particular to shape memory type composite aerogel for inhibiting biological fouling, a preparation method and application of the shape memory type composite aerogel, and the shape memory type composite aerogel comprises a chitosan aerogel single-oriented pore channel structure, a plant polyphenol coating and a polyphenol/iron ion chelate. The plant polyphenol coating is uniformly distributed on the inner wall of a chitosan aerogel single-orientation pore channel, the polyphenol/iron ion chelate is located at the top end of the chitosan aerogel orientation pore channel, the evaporation capacity of the chitosan-based composite aerogel for inhibiting biological fouling under the illumination intensity of 1 kW/m < 2 > is 1.96 kg m <-2 > h <-1 >, and the composite aerogel has the shape memory performance and can be used for preparing the biological fouling-inhibiting chitosan-based composite aerogel for inhibiting the biological fouling-inhibiting chitosan-based composite aerogel for inhibiting the biological fouling-inhibiting chitosan-based composite aerogel for inhibiting the biological fouling-inhibiting chitosan-based composite aerogel for inhibiting the biological fouling-inhibiting chitosan-based composite aerogel for inhibiting the biological fouling-inhibiting chitosan-based composite aerogel. And after extrusion, the prototype can be quickly recovered in water, so that substance diffusion is accelerated to finish modification of inner pore channels, good biological fouling resistance is further realized, and good structural stability and continuous and efficient photo-thermal water evaporation in a complex water environment are ensured.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a shape memory type composite aerogel for inhibiting biofouling, a preparation method and application thereof. Background technique [0002] Interfacial solar water evaporation is a new technology for sustainable clean water production, which converts solar energy into heat energy through photothermal conversion materials at the water-air interface, thereby accelerating water evaporation and realizing the separation of water and pollutants. Currently, porous photothermal materials have the advantages of promoting light energy absorption, steam release, and resistance to salt precipitation, and are widely used in solar water evaporation. However, a large number of microorganisms in the real water environment will adhere to the inner and outer surfaces of porous materials, and further multiply to form biofilms, forming biofouling to block water and vapor transport channels, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00C02F1/14
CPCB01J13/0091C02F1/14Y02A20/212
Inventor 薛敬哲陆杨许昊邢寒野王倩吴文舒陈胜李康康杜亚鑫彭宗顺
Owner HEFEI UNIV OF TECH
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