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Preparation method of PPy (polypyrrole)-PCL (polycaprolactone) antibacterial nanocomposite film

A technology of polycaprolactone and nanocomposite, which is applied in the field of polymer materials and active packaging applications, can solve the problems of surface coating and modification of LDHs that have not yet been retrieved, and achieve good interface compatibility, simple preparation method, and oxygen penetration The effect of sexual performance improvement

Active Publication Date: 2019-08-02
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No report on surface coating modification of LDHs using PPy has been retrieved

Method used

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  • Preparation method of PPy (polypyrrole)-PCL (polycaprolactone) antibacterial nanocomposite film
  • Preparation method of PPy (polypyrrole)-PCL (polycaprolactone) antibacterial nanocomposite film
  • Preparation method of PPy (polypyrrole)-PCL (polycaprolactone) antibacterial nanocomposite film

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Embodiment 1

[0041] This embodiment provides a method for preparing a polypyrrole-polycaprolactone antibacterial nanocomposite film, which is prepared according to the following steps.

[0042] 1) Preparation of LDHs@PPy

[0043] 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 0.22g FeCl 3 ·6H 2 O was dissolved in the LDHs dispersion, stirred ultrasonically for 5 min, followed by magnetic stirring, and adsorbed for 30 min. Then 1.0 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 25°C. The reaction liquid began to gradually turn black. After the reaction, three times of centrifugation and washing, lyophilization to obtain black LDHs@PPy powder.

[0044] 2) Preparation of LDHs@PPy / PCL composite film

[0045] Dissolve 0.01...

Embodiment 2

[0048] This embodiment provides a method for preparing a polypyrrole-polycaprolactone antibacterial nanocomposite film, which is prepared according to the following steps.

[0049] 1) Preparation of LDHs@PPy

[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 0.40g FeCl 3 ·6H 2 O was dissolved in the LDHs dispersion, stirred ultrasonically for 10 min, followed by magnetic stirring, and adsorbed for 40 min. Then 0.16 g of Py was added 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 150 min, and the temperature was 20°C. The reaction liquid began to gradually turn black. After the reaction, the black LDHs@PPy powder was obtained by centrifuging and washing for 5 times, and freeze-drying.

[0051] 2) Preparation of LDHs@PPy / PCL composite film

[0052] Disso...

Embodiment 3

[0054] This embodiment provides a method for preparing a polypyrrole-polycaprolactone antibacterial nanocomposite film, which is prepared according to the following steps.

[0055] 1) Preparation of LDHs@PPy

[0056] 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 0.08g FeCl 3 ·6H 2 O was dissolved in the LDHs dispersion, stirred ultrasonically for 5 min, followed by magnetic stirring, and adsorbed for 20 min. Then 0.80 g of Py was added to 50 mL of deionized H 2 O, magnetically stirred for 20 min until Py was completely dissolved. Finally, the Py aqueous solution was added to the LDHs dispersion, stirred ultrasonically for 50 minutes at a temperature of 30°C, and the reaction solution began to gradually turn black. After the reaction was completed, it was washed by centrifugation four times and freeze-dried to obtain black LDHs@PPy powder.

[0057] 2) Preparation of LDHs@PPy / PCL composite...

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Abstract

The invention provides a preparation method of a PPy (polypyrrole)-PCL (polycaprolactone) antibacterial nanocomposite film. The preparation method comprises steps as follows: PPy surface modified LDHs(layered double hydroxides) clay antibacterial powder (LDHs@PPy) is obtained from PPy coated LDHs clay formed through a chemical oxidation reaction of Py (pyrrole) on the surface of the LDHs clay under the initiation function of soluble Fe<3+> salt; then, a LDHs@PPy / PCL nanocomposite film is prepared from LDHs@PPy and PCL through solution pouring. The interfacial compatibility and the binding force between LDHs and a substrate PCL are increased by a surface organic coating PPy, the blocking property, the mechanical performance and the like of the final nanocomposite are improved, the composite film is endowed with antibacterial performance, and the application of the surface modified LDHs clay / bio-based polymer composite in the field of active packaging is finally extended. The preparation method is simple and is suitable for large-scale production, and conditions are easy to control.

Description

technical field [0001] The invention relates to a preparation method of a polypyrrole-polycaprolactone antibacterial nanocomposite film, relates to the technical field of polymer materials, in particular to the field of active packaging application. 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 excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L67/04C08L79/04C08K9/10C08K3/34C08G73/06
CPCC08G73/0611C08J5/18C08J2367/04C08J2479/04C08K3/346C08K9/10
Inventor 毛龙刘跃军易著武范淑红刘小超陈剑洪
Owner XIAMEN UNIV OF TECH
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