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Method for modifying high-efficiency bactericidal polymer on the surface of sebs material and modified sebs material

A surface modification and polymer technology, applied in the field of SEBS materials, can solve the problems of lack of good fungicides and modification methods, and achieve the effect of low production cost

Active Publication Date: 2021-03-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no good fungicides and modification methods for modifying SEBS materials at present.

Method used

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  • Method for modifying high-efficiency bactericidal polymer on the surface of sebs material and modified sebs material
  • Method for modifying high-efficiency bactericidal polymer on the surface of sebs material and modified sebs material
  • Method for modifying high-efficiency bactericidal polymer on the surface of sebs material and modified sebs material

Examples

Experimental program
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Effect test

Embodiment 1

[0070] A method for modifying highly efficient bactericidal polymers on the surface of SEBS materials, comprising the following steps:

[0071] (1) Surface pretreatment of base material

[0072] Cut the base material SEBS into the desired shape (in this embodiment, it is cut into a disc shape with a diameter of 12 mm and a thickness of 1 mm), and alternately ultrasonically clean it with deionized water and absolute ethanol for 3 times, each time for 15 min, and then Dry under nitrogen atmosphere, stand-by;

[0073] The base material SEBS with a clean surface was soaked in an ethanol solution containing 1 wt% benzophenone for 30 min, and dried at room temperature.

[0074] (2) Initiate polymerization

[0075] The DMSO containing 10wt% peptide antibacterial polymer (also known as chiral peptide antibacterial polymer) is dropped on the surface of the base material after pretreatment, and with ultraviolet reactor (high pressure mercury lamp, 400W, central wavelength 365nm) to I...

Embodiment 2

[0079] A method for modifying highly efficient bactericidal polymers on the surface of SEBS materials, comprising the following steps:

[0080] (1) Surface pretreatment of base material

[0081] Cut the base material SEBS into the desired shape (in this embodiment, it is cut into a disc shape with a diameter of 12 mm and a thickness of 1 mm), and alternately ultrasonically clean it with deionized water and absolute ethanol for 3 times, each time for 15 min, and then Dry under nitrogen atmosphere, stand-by;

[0082] The base material SEBS with clean surface was soaked in ethanol solution containing 0.5wt% benzophenone for 50min, and dried at room temperature.

[0083] (2) Initiate polymerization

[0084] The DMSO containing 8wt% peptide antibacterial polymer (also known as chiral peptide antibacterial polymer) is dropped on the surface of the base material after pretreatment, and with ultraviolet reactor (high pressure mercury lamp, 400W, central wavelength 365nm) to It was ...

Embodiment 3

[0088] A method for modifying highly efficient bactericidal polymers on the surface of SEBS materials, comprising the following steps:

[0089] (1) Surface pretreatment of base material

[0090] Cut the base material SEBS into the desired shape (in this embodiment, it is cut into a disc shape with a diameter of 12 mm and a thickness of 1 mm), and alternately ultrasonically clean it with deionized water and absolute ethanol for 3 times, each time for 15 min, and then Dry under nitrogen atmosphere, stand-by;

[0091] The base material SEBS with clean surface was soaked in ethanol solution containing 1.5wt% benzophenone for 20min, and dried at room temperature.

[0092] (2) Initiate polymerization

[0093] The DMSO containing 15wt% peptide antibacterial polymer (also known as chiral peptide antibacterial polymer) is dropped on the surface of the base material after pretreatment, and with ultraviolet reactor (high pressure mercury lamp, 400W, central wavelength 365nm) to It was...

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Abstract

The invention provides a method for modifying the surface of an SEBS material with an efficient bactericidal polymer and the modified SEBS material, and the modification method comprises the followingsteps: (1) surface pretreatment of a substrate material: mixing the substrate material SEBS with a clean surface with a photoinitiator, and fixing the photoinitiator to the surface of the substrate material; and (2) initiating polymerization: under the condition of ultraviolet light, dripping 8-15wt% of a peptide antibacterial polymer solution on the surface of the substrate material obtained inthe step (1), and then irradiating for 8-15min under the ultraviolet light to obtain the product. According to the invention, the peptide antibacterial polymer is modified on the surface of the SEBS material, so that the SEBS material has the advantages of efficient killing of gram-negative and gram-positive bacteria and no obvious hemolysis and cytotoxicity.

Description

technical field [0001] The invention belongs to the technical field of SEBS materials, and in particular relates to a method for modifying a high-efficiency bactericidal polymer on the surface of SEBS materials and the modified SEBS materials. Background technique [0002] Poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) is an elastic block copolymer obtained by hydrogenating a styrene-butadiene copolymer. Thanks to the hydrogenation of the unsaturated double bonds in the elastomer, it not only has excellent mechanical properties and processing properties, but also has good oxidation resistance and hydrolysis resistance. Therefore, SEBS has been widely used in medical materials, especially medical gloves, urinary catheters, drug-controlled release implant matrix materials, etc. However, since infectious diseases caused by bacteria are one of the main causes of implant failure, it is very necessary to sterilize the SEBS surface. However, there are no good fungicides ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/18C08L53/02
CPCC08J7/18C08J2353/02
Inventor 易强英张宇佳吴尧康珂
Owner SICHUAN UNIV
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