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A method of forming a strong antibacterial layer on the surface of polylactic acid

A technology of polylactic acid and antibacterial layer, applied in the field of materials, can solve the problems of insufficient utilization of antibacterial agents, high price, and inability to play a role

Inactive Publication Date: 2021-04-27
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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  • A method of forming a strong antibacterial layer on the surface of polylactic acid
  • A method of forming a strong antibacterial layer on the surface of polylactic acid
  • A method of forming a strong antibacterial layer on the surface of polylactic acid

Examples

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Embodiment 1

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

[0038] The first step, prepare the macromolecular initiator containing Br

[0039] First, add D-lactide, hydroxyethyl isobromobutyrate and catalyst stannous octoate at a molar ratio of 1:1:1 to a 100mL branch bottle, then add 30mL of solvent toluene to a 100mL branch bottle At one-third of the capacity, stir and dissolve at room temperature, pass nitrogen into the bottle to replace the air three times, then protect it, raise the temperature to 100-150°C, stop the reaction after 3-6 hours, and precipitate and filter the product with ice ether to obtain The white powder is a macromolecular initiator containing Br, GPC data (molecular weight is 12000~24000, the present example molecular weight 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...

Embodiment 2

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

[0049] The first step, prepare the macromolecular initiator containing Br

[0050] First, add D-lactide, hydroxyethyl isobromobutyrate and catalyst stannous octoate at a molar ratio of 1:1:1 to a 100mL branch bottle, then add 30mL of solvent toluene to a 100mL branch bottle At one-third of the capacity, stir and dissolve at room temperature, pass nitrogen into the bottle to replace the air three times, then protect it, raise the temperature to 100-150°C, stop the reaction after 3-6 hours, and precipitate and filter the product with ice ether to obtain The white powder is a macromolecular initiator containing Br, GPC data (molecular weight is 12000~24000, the present example molecular weight is about 18000), 1 ( m,1H).

[0051] The second step is to prepare D-polylactic acid-polytetravinylpyridine PDLA-P4VP block polymer

[0052] In a check bottle, a...

Embodiment 3

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

[0059] The first step, prepare the macromolecular initiator containing Br

[0060] First, add D-lactide, hydroxyethyl isobromobutyrate and catalyst stannous octoate at a molar ratio of 1:1:1 to a 100mL branch bottle, then add 30mL of solvent toluene to a 100mL branch bottle At one-third of the capacity, stir and dissolve at room temperature, pass nitrogen into the bottle to replace the air three times, then protect it, raise the temperature to 100-150°C, stop the reaction after 3-6 hours, and precipitate and filter the product with ice ether to obtain The white powder is a macromolecular initiator containing Br, GPC data (molecular weight is 12000~24000, the present example molecular weight 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...

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Abstract

The invention discloses a method for forming a strong antibacterial layer on the surface of polylactic acid, comprising the following steps: the first step is to prepare a Br-containing macromolecular initiator; the second step is to prepare D-polylactic acid-polytetravinylpyridine PDLA ‑P4VP block polymer; the third step is to prepare stereocomplex polylactic acid PLLA / PDLA‑P4VP; the fourth step is to prepare a strong antibacterial layer on the surface of the stereocomplex polylactic acid PLLA / PDLA‑P4VP material prepared in the previous step. The present invention adopts stereocombination effect to indirect nano-Ag + The particles are introduced into the surface of the polylactic acid material to form an antibacterial layer, and the antibacterial agent nano Ag + The particles are firmly embedded in the surface of the material, making nano-Ag + The particles are fully functional, and after 72 hours of ultrasonic washing, the nano-Ag + The particles are still attached to the surface of the material, and the antibacterial rate against Escherichia coli reaches 100%, which has a strong antibacterial effect.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for forming a strong antibacterial layer on the surface of polylactic acid. Background technique [0002] At present, with the wide application of polylactic acid materials, the demand for surface functionalization is also increasing. The research on antibacterial polylactic acid is still a research hotspot. At present, the industrial production of antibacterial polylactic acid mainly uses organic antibacterial agents and inorganic antibacterial agents, which are synthesized by blending and post-processing. Specific synthesis methods include direct addition of antibacterial agents, secondary synthesis of antibacterial masterbatches, surface physical bonding, electrospinning, and post-processing methods. Among many antibacterial agents, Ag + It is a widely used metal ion antibacterial agent with high-efficiency and long-lasting bactericidal effect. However...

Claims

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Application Information

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Patent Type & Authority Patents(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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