Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Degradable zinc complex-TiO2-polylactic acid antibacterial film and preparation method thereof

A zinc complex, polylactic acid technology, applied in the field of degradable zinc complex-TiO2-polylactic acid antibacterial film, can solve the problems of environmental white pollution, antibacterial materials have no photocatalytic activity, antibacterial materials are difficult to degrade, etc. The effect of improving absorption and utilization

Inactive Publication Date: 2019-12-06
嘉兴瑛蔓贸易有限公司
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a degradable zinc complex-TiO 2 - Polylactic acid antibacterial film and its preparation method, providing a simple method and a low-cost polylactic acid antibacterial film preparation process, while solving the problem that antibacterial m

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Preferably, the preparation method of the Schiff base-zinc complex comprises the following steps:

[0025] (1) Add an appropriate amount of distilled water to the reaction flask, add cellulose powder and potassium periodate in turn, the mass ratio of the two is 1:1.5-2.5, and place the reaction flask in a constant temperature water bath and heat to 60-65 ° C , the selective ring-opening reaction is carried out with uniform stirring for 2-4 hours, the solution is filtered after the reaction, and the solid product is washed with an appropriate amount of distilled water, and fully dried to obtain a cellulose selective ring-opening product.

[0026] (2) Add an appropriate amount of distilled water and anhydrous ethanol to the reaction flask as a mixed solvent, the volume ratio of the two is 2-3:1, then add L-valine and stir until dissolved, and then add the cellulose selective ring-opening product , the mass ratio of the cellulose selective ring-opening product to L-valine ...

Example Embodiment

[0031] Example 1:

[0032] (1) Preparation of cellulose selective ring-opening product: add an appropriate amount of distilled water to the reaction flask, add cellulose powder and potassium periodate in turn, the mass ratio of the two is 1:1.5, and place the reaction flask in a constant temperature water bath. Heating to 60°C in medium, stirring at a constant speed for selective ring-opening reaction for 2 h, after the reaction, the solution was filtered, and the solid product was washed with an appropriate amount of distilled water, and fully dried to obtain cellulose selective ring-opening product 1.

[0033] (2) Preparation of Schiff base organic ligands: Add an appropriate amount of distilled water and absolute ethanol to the reaction flask as a mixed solvent, the volume ratio of the two is 2:1, then add L-valine and stir until dissolved, and then add fiber The mass ratio of cellulose selective ring-opening product to L-valine was 1:3, the reaction flask was heated to 70°...

Example Embodiment

[0037] Example 2:

[0038] (1) Preparation of cellulose selective ring-opening product: add an appropriate amount of distilled water to the reaction flask, add cellulose powder and potassium periodate in turn, the mass ratio of the two is 1:2, and place the reaction flask in a constant temperature water bath The mixture was heated to 60°C in medium and stirred at a constant speed for selective ring-opening reaction for 3 hours. After the reaction was over, the solution was filtered, and the solid product was washed with an appropriate amount of distilled water, and fully dried to obtain cellulose selective ring-opening product 2.

[0039] (2) Preparation of Schiff base organic ligands: add an appropriate amount of distilled water and absolute ethanol into the reaction flask as a mixed solvent, the volume ratio of the two is 2.5:1, then add L-valine and stir until dissolved, and then add fiber The cellulose selective ring-opening product 2, the mass ratio of the cellulose selec...

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 relates to the technical field of degradable antibacterial films, and discloses a degradable zinc complex-TiO2-polylactic acid antibacterial film and a preparation method thereof. The degradable zinc complex-TiO2-polylactic acid antibacterial film comprises the following formula raw materials: a Schiff base-zinc complex, tetraisopropyl titanate, polylactic acid and polydimethylsiloxane. According to the degradable zinc complex-TiO2-polylactic acid antibacterial film and the preparation method thereof, photogenerated electrons e- and holes h+ are produced by nano TiO2 under illumination, the holes h+ oxidize -OH and H2O molecules on the surface of nano TiO2 into strongly oxidizing .OH, meanwhile, the Schiff base-zinc complex captures the photogenerated electrons e- to form a strong reductive excited state, and is in redox reaction with active protein oxygen metabolizing enzymes in bacteria or microorganisms, the metabolic process of the microorganisms is inhibited and destroyed, and the excited states of the photogenerated electrons e-, the strongly oxidizing holes h+ and the strongly reductive complex promote reduction and bond cleavage of ester groups in the polylactic acid, and thus, the process of oxidatively decomposing the polylactic acid into CO2 and H2O is accelerated.

Description

technical field [0001] The invention relates to the technical field of degradable antibacterial films, in particular to a degradable zinc complex-TiO 2 -polylactic acid antibacterial film and its preparation method. Background technique [0002] Antibacterial material is a new type of functional material that can kill or inhibit bacteria and microorganisms. Antibacterial film can be divided into antibacterial film and bacteriostatic film. The film on antibacterial material is mainly made of antibacterial agent into antibacterial masterbatch , prepared by single-layer extrusion or salivation of antibacterial masterbatch and resin, antibacterial agent can also be used as surface layer and packaging material to form antibacterial composite film, and antibacterial agent can be coated or evaporated on the resin film. Obtained, the antibacterial film can regulate moisture and inhibit the growth and reproduction of microorganisms, and has the advantages of no food contamination an...

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
IPC IPC(8): C08L67/04C08L83/04C08K3/22C08K5/00C08J5/18
CPCC08J5/18C08J2367/04C08J2483/04C08K5/0091C08K2003/2241
Inventor 张海苗赵川乔如春
Owner 嘉兴瑛蔓贸易有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com