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Method for forming strong antibacterial layer on surface of polylactic acid

A technology of polylactic acid and antibacterial layer, applied in the field of materials, can solve the problems of high price, insufficient utilization of antibacterial agents, inability to exert efficacy, etc., and achieve the effect of simple processing process and high antibacterial properties.

Inactive Publication Date: 2019-04-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among many antibacterial agents, Ag + It is a widely used metal ion antibacterial agent with high-efficiency and long-lasting bactericidal effect. However, Ag + Compared with other antibacterial agents, the price of antibacterial agents is higher, and the conventional blending method is due to the partial Ag + Included in the polylactic acid material and cannot function, resulting in insufficient utilization of antibacterial agents

Method used

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  • Method for forming strong antibacterial layer on surface of polylactic acid
  • Method for forming strong antibacterial layer on surface of polylactic acid
  • Method for forming strong antibacterial layer on surface of polylactic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for forming a strong antibacterial layer on the surface of polylactic acid includes the following steps:

[0038] The first step is to prepare a macroinitiator containing Br

[0039] First, add D-lactide, hydroxyethyl isobromobutyrate and catalyst stannous octoate in a molar ratio of 1:1:1 to a 100mL vial, and then add 30mL toluene as a solvent to a 100mL vial One-third of the volume, stir and dissolve at room temperature, pass nitrogen into the bottle to replace the air three times, and protect it. The temperature is raised to 100~150℃, and the reaction is stopped after 3~6h. The product is precipitated and filtered with ice ether to obtain The white powder is a macromolecular initiator containing Br, GPC data (molecular weight is 12000-24000, the molecular weight of this example is about 18000), 1 HNMR(400MHz,DMSO-d6)δ5.21(q,J=6.9Hz,2H), 1.89(d,J=11.4Hz,OH), 1.47(d,J=7.0Hz,6H), 1.31-1.13( m,1H).

[0040] The second step is to prepare D-polylactic acid-polytetravin...

Embodiment 2

[0048] A method for forming a strong antibacterial layer on the surface of polylactic acid includes the following steps:

[0049] The first step is to prepare a macroinitiator containing Br

[0050] First, add D-lactide, hydroxyethyl isobromobutyrate and catalyst stannous octoate in a molar ratio of 1:1:1 to a 100mL vial, and then add 30mL toluene as a solvent to a 100mL vial One-third of the volume, stir and dissolve at room temperature, pass nitrogen into the bottle to replace the air three times, and protect it. The temperature is raised to 100~150℃, and the reaction is stopped after 3~6h. The product is precipitated and filtered with ice ether to obtain The white powder is a macromolecular initiator containing Br, GPC data (molecular weight is 12000-24000, the molecular weight of this example is about 18000), 1 HNMR (400MHz, DMSO-d6) δ 5.21 (q, J = 6.9 Hz, 2H), 1.89 (d, J = 11.4 Hz, 1H), 1.47 (d, J = 7.0 Hz, 6H), 1.31-1.13 ( m,1H).

[0051] The second step is to prepare D-polyl...

Embodiment 3

[0058] A method for forming a strong antibacterial layer on the surface of polylactic acid includes the following steps:

[0059] The first step is to prepare a macroinitiator containing Br

[0060] First, add D-lactide, hydroxyethyl isobromobutyrate and catalyst stannous octoate in a molar ratio of 1:1:1 to a 100mL vial, and then add 30mL toluene as a solvent to a 100mL vial One-third of the volume, stir and dissolve at room temperature, pass nitrogen into the bottle to replace the air three times, and protect it. The temperature is raised to 100~150℃, and the reaction is stopped after 3~6h. The product is precipitated and filtered with ice ether to obtain The white powder is a macromolecular initiator containing Br, GPC data (molecular weight is 12000-24000, the molecular weight of this example is about 18000), 1 HNMR(400MHz,DMSO-d6)δ5.21(q,J=6.9Hz,2H), 1.89(d,J=11.4Hz,OH), 1.47(d,J=7.0Hz,6H), 1.31-1.13( m,1H).

[0061] The second step is to prepare D-polylactic acid-polytetravin...

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Abstract

The invention discloses a method for forming a strong antibacterial layer on the surface of polylactic acid. The method comprises the following steps: 1, preparing a Br-containing macromolecular initiator; 2, preparing a poly(D-lactic acid)-polytetravinylpyridine (PDLA-P4VP) block polymer; 3, preparing a stereocomplex polylactic acid PLLA / PDLA-P4VP; and 4, preparing the strong antibacterial layeron the surface of the stereocomplex polylactic acid PLLA / PDLA-P4VP material. The stereocomplexing effect is adopted to indirectly introduce Ag<+> nanoparticles to the surface of the polylactic acid material to form the antibacterial layer, the firm embedding of the antibacterial agent Ag<+> nanoparticles in the surface of the material makes the Ag<+> nanoparticles fully work, the Ag<+> nanoparticles are still attached to the surface of the material after the material is ultrasonically washed with water for 72 h, the antibacterial rate against Escherichia coli is 100%, and the antibacterial layer has a strong antibacterial effect.

Description

Technical field [0001] The invention belongs to the technical field of materials, and specifically relates to a method for forming a strong antibacterial layer on the surface of polylactic acid. Background technique [0002] At present, with the widespread application of polylactic acid materials, the demand for surface functionalization is also increasing. The research of antibacterial polylactic acid is still a research hotspot. At present, the production of antibacterial polylactic acid in industry mainly uses organic antibacterial agents and inorganic antibacterial agents, which are synthesized through blending and post-treatment methods. Specific synthesis methods include direct addition of antibacterial agents, secondary synthesis of antibacterial masterbatch, surface physical bonding, electrostatic spinning, post-processing and so on. Among the many antibacterial agents, Ag + It is a widely used metal ion antibacterial agent, which has an efficient and long-lasting bacter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/06C08L53/00
CPCC08J7/06C08J2353/00
Inventor 唐颂超戴光耀王婷兰姚远
Owner EAST CHINA UNIV OF SCI & TECH
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