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
View PDF3 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap