Production method of near-infrared photo-responsive sterilization-deadhesion wrinkle surface

A near-infrared light-responsive, wrinkling technology, applied in disinfection, coating, irradiation and other directions, can solve the problems of long-term sterilization, inability to remove bacteria, hinder bacterial adhesion, etc., and achieve simple process and excellent photothermal conversion. Efficient, simple and easy to implement

Active Publication Date: 2020-02-21
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active sterilizing surface kills bacteria by introducing bactericidal drugs on the surface of the material, contacting bacteria or releasing drugs, but this type of sterilizing surface cannot remove the bacteria that have been killed on the surface, which reduces the antibacterial performance of the antibacterial surface and cannot achieve long-term sterilization Effect
The passive antibacterial surface can hinder the adhesion of bacteria by changing the surface properties of the material, such as electrostatic interaction, superhydrophobic surface and other passive antibacterial methods, but the passive antibacterial surface can only initially inhibit the adhesion of bacteria. Bacteria on the surface of the material will be helpless

Method used

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  • Production method of near-infrared photo-responsive sterilization-deadhesion wrinkle surface
  • Production method of near-infrared photo-responsive sterilization-deadhesion wrinkle surface
  • Production method of near-infrared photo-responsive sterilization-deadhesion wrinkle surface

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preparation example Construction

[0024] like figure 1 and figure 2 Shown, a kind of preparation method of near-infrared photoresponsive type sterilization-deadhesion wrinkled surface comprises the steps:

[0025] 1) Add the carbon nanomaterials covered with TEOS into the PDMS / xylene solution, ultrasonically disperse the carbon nanomaterials completely, then remove the solvent, add a curing agent, and solidify to form a film to obtain a soft base of the film-based wrinkling system:

[0026] 2) The solution obtained by dissolving the polymer material and photosensitizer in an organic solvent is spin-coated on the PDMS soft substrate rich in carbon nanomaterials, and the sample after spin coating is processed in a vacuum oven to remove the organic solvent, and the polymer material is obtained as a surface. Hard film, carbon nanomaterials / PDMS is a composite film structure with soft substrate.

[0027] 3) The composite film layer is irradiated with near-infrared light (such as 808nm) for a certain period of ti...

Embodiment 1

[0042] 2 mg of single-walled carbon nanotubes (CNTs) were pre-soaked in TEOS solution for 2 h, and then centrifuged at 3000 r / min to remove the supernatant. The CNTs obtained after centrifugation were added to a 16g PDMS / 20ml xylene solution, and ultrasonicated at 30°C for 12h. Then place it in a vacuum oven at 70°C for 24 hours to remove xylene, then add 1.6g of curing agent, pour the mixed solution into a mold prepared in advance, and then place it in a vacuum oven at 70°C for 24 hours to obtain a film base Soft base for creping systems.

[0043] Cut the prepared PDMS / CNT soft substrate into equal large pieces, ultrasonically clean them with water and ethanol respectively, and dry them for later use. Add 100 mg of polymethyl methacrylate (PMMA) into 10 ml of xylene, and sonicate for 0.5 h. Spin-coat 100 μl of PMMA solution on the PDMS / CNT soft substrate at a speed of 1500r / min, and treat the spin-coated sample in a vacuum oven at room temperature for 12 hours to remove the...

Embodiment 2

[0047] 1.6 mg of single-walled carbon nanotubes (CNTs) were pre-soaked in TEOS solution and sonicated for 1 h, and then centrifuged at 3000 r / min to remove the supernatant. The CNTs obtained after centrifugation were added to a 16g PDMS / 20ml xylene solution, and ultrasonicated at 30°C for 8h. Then place it in a vacuum oven at 60°C for 36 hours to remove xylene, then add 1.6g of curing agent, pour the mixed solution into a mold prepared in advance, and then place it in a vacuum oven at 60°C for 36 hours to obtain a film base Soft base for creping systems.

[0048] Cut the prepared PDMS / CNT soft substrate into equal large pieces, ultrasonically clean them with water and ethanol respectively, and dry them for later use. Add 200mg of polyvinyl alcohol (PVA) into 10ml of xylene, and sonicate for 0.5h. Spin-coat 100 μl of PVA solution on the PDMS / CNT soft substrate at a speed of 1500r / min, and treat the spin-coated sample in a vacuum oven at room temperature for 12 hours to remove...

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Abstract

The invention discloses a production method of a near-infrared photo-responsive sterilization-deadhesion wrinkle surface. The production method of the near-infrared photo-responsive sterilization-deadhesion wrinkle surface comprises the following steps: adding a carbon nanometer material with surfaces covered by tetraethyl orthosilicate into a polydimethylsiloxane solution, conducting ultrasonic treatment, removing a solvent, and adding a curing agent for curing to form a film, so as to obtain a soft substrate of a membrane-based wrinkling system; (2) dissolving a high polymer material and a photosensitizer in an organic solvent, conducting spin-coating on the obtained solution on the PDMS soft substrate to obtain a soft-hard combined compound membrane structure, and conducting treatment in a vacuum oven to remove the organic solvent; and (3) irradiating the compound membrane with near-infrared light for certain time to produce the wrinkle material surface. By means of excellent photothermal conversion efficiency of the carbon nanometer material and difference between coefficients of thermal expansion of a soft layer and a hard layer, the near-infrared photo-responsive wrinkle surface is produced, according to the surface, switch of morphology of a flat surface and the wrinkle surface can be achieved by adding or removing near-infrared light, and during near-infrared illumination, the photosensitizer generates singlet oxygen to kill bacteria, so that dual response is achieved by one step.

Description

technical field [0001] The invention belongs to the technical field of biological materials, and in particular relates to a method for preparing a near-infrared light-responsive sterilization-deadhesion wrinkled surface. Background technique [0002] Bacteria are everywhere, and bacterial infections are the second leading cause of death after heart disease. Therefore, the construction of antibacterial functional surfaces is very important, and antibacterial functional surfaces are mainly divided into active antibacterial surfaces and passive anti-adhesion surfaces. The active sterilizing surface kills bacteria by introducing bactericidal drugs on the surface of the material, contacting bacteria or releasing drugs, but this type of sterilizing surface cannot remove the bacteria that have been killed on the surface, which reduces the antibacterial performance of the antibacterial surface and cannot achieve long-term sterilization Effect. The passive antibacterial surface can...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J7/04C08L83/04C08K9/06C08K3/04A61L2/08
CPCC08J7/123A61L2/088A61L2/085C08J2383/04C08J2433/12C08J2425/06C08J2429/04C08J2439/06C08J2467/04C08K9/06C08K3/041C08K3/042C08K2201/011
Inventor 王囡叶玮孙静刘静静张超柳森刘爱辉丁红燕
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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