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Polylactic acid-polypyrrole/silver composite antibacterial film and preparation method thereof

A compound antibacterial and polypyrrole technology, applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve problems such as agglomeration and high cost of silver nanoparticles, and achieve the effect of enhancing antibacterial performance

Active Publication Date: 2019-02-22
XIAMEN AMESON NEW MATERIAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silver nanoparticles are currently the most potential inorganic antibacterial materials. Silver ions released from unstable silver nanoparticles have excellent biocidal effects. However, silver nanoparticles are expensive and easy to produce due to high surface area to volume ratio. strong tendency to reunite

Method used

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  • Polylactic acid-polypyrrole/silver composite antibacterial film and preparation method thereof
  • Polylactic acid-polypyrrole/silver composite antibacterial film and preparation method thereof
  • Polylactic acid-polypyrrole/silver composite antibacterial film and preparation method thereof

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preparation example Construction

[0032] The embodiment of the present invention provides a preparation method of polylactic acid-polypyrrole / silver composite antibacterial film, comprising the following steps:

[0033] S1, obtain PLA film;

[0034] S2. Preparation of AgNO 3 aqueous solution, put the PLA film on the AgNO 3 Soak and absorb in the aqueous solution to obtain the mixed solution;

[0035] S3, preparing Py monomer solution, pouring Py monomer solution into the mixed solution, Ag 3+ Initiating the oxidative polymerization reaction of the Py monomer on the surface of the PLA film to obtain a composite antibacterial film.

[0036] During the preparation process, the Ag + As an oxidizing agent, Py monomer is oxidized and polymerized to form PPy. In this process, Ag + It is reduced to form Ag simple substance and compound with PPy to form a composite antibacterial coating coated on the surface of PLA film to exert a dual antibacterial effect.

[0037] Further, in a preferred embodiment of the prese...

Embodiment 1

[0049] This embodiment provides a polylactic acid-polypyrrole / silver composite antibacterial film, which is prepared according to the following steps.

[0050] (1) Weigh 2g of PLA and dissolve it in 40ml of chloroform, stir magnetically at room temperature for 4h to dissolve completely, ultrasonicate for 30min until there are no obvious bubbles, transfer to a horizontally placed polytetrafluoroethylene mold and dry naturally to form a film. The length and width are 60mm×60mm.

[0051] (2) 0.068g AgNO 3 Dissolve in 40ml deionized water, stir well and sonicate for 5min to obtain AgNO 3 aqueous solution, the PLA film was immersed in AgNO 3 A mixed solution was obtained in an aqueous solution, and the temperature of the mixed solution was raised to 70° C., and the PLA film was adsorbed in the solution for 30 minutes.

[0052] (3) Take 0.625ml of Py and dissolve it in 40ml of deionized water, sonicate for 10min to fully dissolve it.

[0053] (4) Transfer the Py solution to the ...

Embodiment 2

[0056] This embodiment provides a polylactic acid-polypyrrole / silver composite antibacterial film, which is prepared according to the following steps.

[0057] (1) Weigh 2g of PLA and dissolve it in 40ml of chloroform, stir magnetically at room temperature for 4h to dissolve completely, ultrasonicate for 30min until there are no obvious bubbles, transfer to a horizontally placed polytetrafluoroethylene mold and dry naturally to form a film. The length and width are 60mm×60mm.

[0058] (2) 0.32g AgNO 3 Dissolve in 40ml deionized water, stir well and sonicate for 5min to obtain AgNO 3 aqueous solution, the PLA film was immersed in AgNO 3 A mixed solution was obtained in an aqueous solution, and the temperature of the mixed solution was raised to 80° C., and the PLA film was adsorbed in the solution for 30 minutes.

[0059] (3) Take 0.625ml of Py and dissolve it in 40ml of deionized water, sonicate for 10min to fully dissolve it.

[0060] (4) Transfer the Py solution to the m...

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Abstract

The invention provides a preparation method of a polylactic acid-polypyrrole / silver composite antibacterial film and relates to the technical field of polymer materials. The preparation method comprises the steps: acquiring a PLA film; preparing an AgNO3 aqueous solution, and placing the PLA film into the AgNO3 aqueous solution to carry out soaking and adsorption; and preparing a Py monomer solution, pouring the Py monomer solution into a mixed solution, and triggering a Py monomer to be subjected to an oxidative polymerization reaction on the surface of the PLA film by Ag<3+> to obtain the composite antibacterial film. The composite antibacterial film has excellent heat stability and antibacterial properties. In addition, the invention further relates to the polylactic acid-polypyrrole / silver composite antibacterial film comprising a PLA film matrix and a surface PPy / Ag composite antibacterial coating covering the PLA film matrix. The polylactic acid-polypyrrole / silver composite antibacterial film is simple in preparation method and low in cost and has a certain research significance in the field of PLA active packaging.

Description

technical field [0001] The invention relates to the field of polymer materials, and in particular to a polylactic acid-polypyrrole / silver composite antibacterial film and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) material is a biodegradable polymer material with excellent biocompatibility and physical properties, and has excellent biocompatibility and stiffness. PLA has great application potential in the packaging field, and can replace traditional plastic packaging materials to a certain extent, and alleviate the current increasingly serious environmental pollution problems. However, there are certain defects in the barrier properties and antibacterial properties of PLA itself, which need to be further improved. [0003] Studies have shown that conductive polymer materials can also achieve antibacterial effects through electrostatic interactions. Therefore, conductive polymer materials can be used to produce strong electrostatic bond...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J5/18C08L67/04C09D179/04C09D5/14C08G73/06
CPCC08G73/06C08J5/18C08J2367/04C08J2479/04C08K2003/0806C09D5/14C09D179/04C08J7/0427C08K3/08
Inventor 毛龙刘跃军姚进陈剑洪刘静怡郑思洁
Owner XIAMEN AMESON NEW MATERIAL INC
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