Double-layer composite aerogel for inhibiting biofilm formation, preparation method and application thereof

A technology for inhibiting biofilm and double-layer composite, which is applied in the field of preparation and double-layer composite airgel that inhibits the formation of biofilm. It can solve the problems that the formation of surface biofilm cannot be inhibited, and achieve good water evaporation performance and good compression resilience. The effect of maintaining shape integrity

Active Publication Date: 2019-08-09
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing materials used for solar-induced water evaporation cannot inhibit the formation of biofilm on its surface, and a double-layer composite airgel, a preparation method and an application for inhibiting the formation of biofilm are provided

Method used

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  • Double-layer composite aerogel for inhibiting biofilm formation, preparation method and application thereof
  • Double-layer composite aerogel for inhibiting biofilm formation, preparation method and application thereof
  • Double-layer composite aerogel for inhibiting biofilm formation, preparation method and application thereof

Examples

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Embodiment 1

[0051] The present embodiment prepares chitosan airgel (CS airgel), and concrete steps are as follows:

[0052] (1) Take 2g chitosan powder, add 99mL deionized water and 1mL acetic acid, stir to form a transparent solution, which is 2% shell

[0053] polysaccharide solution;

[0054] (2) adjust the pH of chitosan solution to neutrality with 1% sodium hydroxide solution;

[0055] (3) the chitosan solution adjusted to neutrality is carried out orientation freezing with liquid nitrogen and the time of orientation freezing is 30 minutes;

[0056] (4) The frozen chitosan solution is freeze-dried to obtain the chitosan airgel;

[0057] Chitosan airgel soaked in 10 5 CFU / mL E. coli solution and Staphylococcus aureus solution, and shaken at 37°C for 3 days, after a series of processes such as dehydration, fixation and freeze-drying, the samples were observed with a scanning electron microscope, and the results were as follows: figure 1 . It can be seen from the figure that a larg...

Embodiment 2

[0060] The present embodiment prepares chitosan / zinc oxide nanoparticle airgel (CZ airgel), and concrete steps are as follows:

[0061] (1) Get 2g chitosan powder, add 99mL deionized water and 1mL acetic acid, stir into a transparent solution, which is 2% chitosan solution;

[0062] (2) adjust the pH of chitosan solution to neutrality with 1% sodium hydroxide solution;

[0063] (3) Zinc oxide nanoparticles are configured into a 2mg / mL aqueous dispersion, which is added dropwise to the chitosan solution and the mass ratio of zinc oxide nanoparticles to chitosan is 1:50, stirred evenly to obtain Chitosan / zinc oxide nanoparticle mixture;

[0064] The chitosan / zinc oxide nanoparticle mixed liquid is oriented frozen with liquid nitrogen and the time of oriented freezing is 30 minutes, and then dried in a freeze dryer to obtain the chitosan / zinc oxide nanoparticle aerogel;

[0065] image 3 It is a scanning picture of chitosan / zinc oxide nanoparticle airgel, and it can be seen fr...

Embodiment 3

[0073] The present embodiment prepares chitosan / silver nanoparticle airgel (CSS airgel), and concrete steps are as follows:

[0074] (1) Take 2g chitosan powder, add 99mL deionized water and 1mL acetic acid, stir to form a transparent solution, which is 2% shell

[0075] polysaccharide solution;

[0076] (2) adjust the pH of chitosan solution to neutrality with 1% sodium hydroxide solution;

[0077] (3) Silver nanoparticles are configured into a 2mg / mL aqueous dispersion, which is added dropwise to the chitosan solution and the silver nanoparticles

[0078] The mass ratio of particle and chitosan is 1:50, stirs evenly, obtains chitosan / silver nano particle mixed solution;

[0079] (4) The chitosan / silver nanoparticle mixed liquid was carried out orientation freezing with liquid nitrogen and the orientation freezing time was 30 minutes, and then

[0080] Finally, dry in a freeze dryer to obtain chitosan / silver nanoparticle airgel;

[0081] Soak the chitosan / silver nanoparti...

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Abstract

The invention discloses a double-layer composite aerogel for inhibiting biofilm formation, a preparation method and application. The double-layer composite aerogel includes a porous graphene oxide layered structure, a chitosan oriented pore structure and antibacterial particles. The porous graphene oxide layered structure is located at the top of the chitosan oriented pore structure, and the antibacterial particles are evenly distributed on the pore inner wall of the chitosan oriented pore structure. The double-layer composite aerogel for inhibiting biofilm formation has an evaporation capacity of 13.5kgh<-1>m<-2> and evaporation efficiency of 90.8% under illumination intensity of 10kW / m<2>. The double-layer composite aerogel for inhibiting biofilm formation provided by the invention has stable structure and good biological inhibition effect, ensures smooth water channels, guarantees evaporation efficiency and has good recyclability.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a double-layer composite airgel for inhibiting the formation of biofilm, a preparation method and an application. Background technique [0002] With the rise of modern industry, we are facing more and more serious problems of water shortage and water pollution. How to efficiently use solar energy resources to treat seawater and industrial wastewater is an effective measure to solve the shortage of water resources and water pollution. At present, the use of solar energy for water treatment and seawater desalination has become a hot research field. [0003] The ternary composite airgel was prepared by mixing graphene oxide aqueous solution, sodium alginate solution and cetyltrimethylammonium bromide-modified carbon nanotubes through hydrothermal, freezing and heat treatment steps. Under one sunlight intensity, the light-to-heat conversion effici...

Claims

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Application Information

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IPC IPC(8): C08L5/08C08K3/04C08K3/22C08K3/08C08J9/28F22B1/00
CPCC08J9/0066C08J9/008C08J9/28C08J2305/08C08K2003/0806C08K2003/2296C08K2201/011C08K3/042F22B1/006
Inventor 陆杨王湘颖薛敬哲吴亚东宋永红闫旭陈胜
Owner HEFEI UNIV OF TECH
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