A kind of preparation method of polycaprolactone antibacterial nanocomposite film

A nanocomposite and polycaprolactone technology, which is applied in the fields of polymer materials and active packaging, can solve the problems of high cost and agglomeration of silver nanoparticles, and achieve a product suitable for large-scale production, low cost, and good interface compatibility. Effect

Active Publication Date: 2021-09-24
XIAMEN UNIV OF TECH
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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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  • A kind of preparation method of polycaprolactone antibacterial nanocomposite film
  • A kind of preparation method of polycaprolactone antibacterial nanocomposite film
  • A kind of preparation method of polycaprolactone antibacterial nanocomposite film

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Effect test

Embodiment 1

[0037] This embodiment provides a preparation method of polycaprolactone antibacterial nanocomposite film, which is prepared according to the following steps.

[0038] 1) Preparation of LDHs@PPy-Ag

[0039] Weigh 0.05g LDHs and disperse in 50mL deionized H 2 O, ultrasonic stirring for 30min to obtain 0.5g / L LDHs dispersion. Then weigh 0.02g of silver nitrate and 0.2g of ferric nitrate and dissolve them in the LDHs dispersion, stir ultrasonically for 5min, then magnetically stir for 30min, and heat up to 70°C. Subsequently, 0.66 g of Py was added to 50 mL of deionized H 2 In O, sonicate for 10 min until Py is completely dissolved. Finally, the Py aqueous solution was added to the LDHs dispersion, stirred by magnetic force for 60 min, and the temperature was 70°C. The reaction liquid began to gradually turn black. After the reaction was completed, it was centrifuged three times and then freeze-dried to obtain black LDHs@PPy-Ag powder.

[0040] 2) Preparation of LDHs@PPy-Ag / ...

Embodiment 2

[0048] This embodiment provides a preparation method of polycaprolactone antibacterial nanocomposite film, which is prepared according to the following steps.

[0049] 1) Preparation of LDHs@PPy-Ag

[0050] Weigh 0.05g LDHs and disperse in 50mL deionized H 2 O, ultrasonic stirring for 30min to obtain 0.5g / L LDHs dispersion. Then weigh 0.01g of silver nitrate and 0.2g of ferric nitrate and dissolve them in the LDHs dispersion, ultrasonically stir for 10min, then magnetically stir for 40min, and heat up to 60°C. Then add 0.1 g of Py to 50 mL of deionized H 2 In O, sonicate for 10 min until Py is completely dissolved. Finally, the Py aqueous solution was added to the LDHs dispersion liquid, stirred by magnetic force for 100 min, and the temperature was 60°C, and the reaction liquid began to gradually turn black. After the reaction was completed, it was centrifuged three times and then freeze-dried to obtain black LDHs@PPy-Ag powder.

[0051] 2) Preparation of LDHs@PPy-Ag / PCL...

Embodiment 3

[0058] This embodiment provides a preparation method of polycaprolactone antibacterial nanocomposite film, which is prepared according to the following steps.

[0059] 1) Preparation of LDHs@PPy-Ag

[0060] Weigh 0.05g LDHs and disperse in 50mL deionized H 2 O, ultrasonic stirring for 30min to obtain 0.5g / L LDHs dispersion. Then weigh 0.02g of silver nitrate and 0.40g of ferric nitrate and dissolve them in the LDHs dispersion, stir ultrasonically for 5min, then magnetically stir for 20min, and heat up to 80°C. Then measure 0.25 g of Py and add to 50 mL of deionized H 2 O, sonicate for 20 min until Py is completely dissolved. Finally, the Py aqueous solution was added to the LDHs dispersion, stirred by magnetic force for 120 min, and the temperature was 80°C. The reaction liquid began to gradually turn black. After the reaction was completed, it was centrifuged three times and then freeze-dried to obtain black LDHs@PPy-Ag powder.

[0061] 2) Preparation of LDHs@PPy-Ag / PCL ...

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Abstract

The invention provides a preparation method of polycaprolactone antibacterial nanocomposite film, comprising the following steps: by utilizing soluble Ag + Salt and Soluble Fe 3+ The salt synergistic effect triggers the chemical oxidation reaction of pyrrole (Py) on the surface of layered clays (LDHs), and at the same time, the chemical reduction of newly formed PPy can bind and reduce silver ions to metallic silver nanoparticles (AgNPs) and then form polypyrrole (PPy) coated clay LDHs to obtain polypyrrole surface modified layered clay antibacterial powder (LDHs@PPy‑Ag); finally, LDHs@PPy‑Ag and polycaprolactone (PCL) were prepared by solution casting to prepare LDHs@PPy‑Ag Ag / PCL nanocomposite films. The present invention increases the interfacial compatibility and binding force between LDHs and the substrate PCL through the surface organic coating PPy, improves the mechanical properties and gas barrier properties of the final nanocomposite, and endows the composite film with excellent antibacterial properties, and finally expands The application of the surface-modified layered clay / bio-based polymer composite material in the field of active packaging has a simple preparation method and easy control of conditions, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a polycaprolactone antibacterial nanocomposite film, relates to the technical field of polymer materials, in particular to the application field of active packaging. Background technique [0002] Among the high-performance environment-friendly degradable plastics, aliphatic polyester is one of the most promising polymer materials at present. Polycaprolactone (PCL), as an aliphatic polyester with good application potential, is derived from the ring-opening polymerization of ε-caprolactone (ε-CL), and has been widely used in food and healthcare product packaging and agricultural films. Wider range of applications. Although PCL is the most biodegradable synthetic aliphatic polyester, its poor structural and functional stability hinders its production and application, especially the urgent need for higher barrier and antibacterial properties. [0003] Layered double hydroxides (LDHs) have excellent propert...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C08J5/18C08L67/04C08L79/04C08K9/10C08K3/34C08K3/08C08G73/06
CPCC08G73/0611C08J5/18C08J2367/04C08J2479/04C08K3/346C08K9/10C08K2003/0806C08K2201/011
Inventor毛龙刘跃军刘小超范淑红
OwnerXIAMEN UNIV OF TECH