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Method for preparing reinforced and toughened stimuli-responsive flexible packaging anti-oxidation composite film

A stimuli-responsive, enhanced and toughened technology, applied in coatings and other directions, can solve problems such as unresolved excitation mechanisms, achieve the effect of maintaining quality and safety, and extending shelf life

Inactive Publication Date: 2019-08-06
JIANGSU SUNKEY PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing controlled-release antioxidant active packaging film is in a release state after preparation, and its excitation mechanism has not yet been resolved, so that it is in a controllable state during the entire circulation and use process

Method used

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  • Method for preparing reinforced and toughened stimuli-responsive flexible packaging anti-oxidation composite film
  • Method for preparing reinforced and toughened stimuli-responsive flexible packaging anti-oxidation composite film
  • Method for preparing reinforced and toughened stimuli-responsive flexible packaging anti-oxidation composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Dispersion of carbon nanotubes in PET resin:

[0039] a. Prepare a mixture of phenol:tetrachloroethane=3:2 in parts by mass, stir evenly, and add carbon nanotubes (L-MWCNT-1020) and PET resin. Among them, the mass ratio of carbon nanotubes: PET resin: mixed solution is 1:100:450;

[0040]b. Use an ultrasonic cell disruptor to sonicate for two hours, stir at room temperature for three hours, repeat three times to form a homogeneous phase, and remove the solvent in a rotary evaporator;

[0041] c. Heat the PET containing carbon nanotubes at 120° C. for 20 hours in a vacuum drying oven.

[0042] (2) Preparation of modified BOPET:

[0043] d. Use a twin-screw extruder with a temperature of 200-230°C in the front section and a temperature of 230-250°C in the back section to re-granulate the mixture to form master batches, and dry them for later use.

[0044] e. Using the extruder, set the temperature on the panel to 200-250°C, set the screw speed to 40r / min, the speed...

Embodiment 2

[0072] (1) Dispersion of carbon nanotubes in PET resin

[0073] a. Prepare a mixture of phenol:tetrachloroethane=3:2 in parts by mass, stir evenly, and add carbon nanotubes (L-MWCNT-1020) and PET resin. Among them, the mass ratio of carbon nanotubes: PET resin: mixed solution is 1:120:480;

[0074] b. Use an ultrasonic cell disruptor to sonicate for two hours, stir at room temperature for three hours, repeat three times to form a homogeneous phase, and remove the solvent in a rotary evaporator;

[0075] c. Heat the PET containing carbon nanotubes at 120° C. for 20 hours in a vacuum drying oven.

[0076] (2) Preparation of modified BOPET:

[0077] d. Use a twin-screw extruder with a temperature of 200-230°C in the front section and a temperature of 230-250°C in the back section to re-granulate the mixture to form master batches, and dry them for later use.

[0078] e. Using the extruder, set the temperature on the panel to 200-250°C, set the screw speed to 45r / min, the speed...

Embodiment 3

[0101] (1) Dispersion of carbon nanotubes in PET resin

[0102] a. Prepare a mixture of phenol:tetrachloroethane=3:2 in parts by mass, stir evenly, and add carbon nanotubes (L-MWCNT-1020) and PET resin. Among them, the mass ratio of carbon nanotubes: PET resin: mixed solution is 1:140:500;

[0103] b. Sonicate for two hours with an ultrasonic cell disruptor, stir at room temperature for three hours, repeat three times to form a homogeneous phase, and remove the solvent in a rotary evaporator.

[0104] c. Heat the PET containing carbon nanotubes at 120° C. for 20 hours in a vacuum drying oven.

[0105] (2) Preparation of modified BOPET:

[0106] d. Use a twin-screw extruder with a temperature of 200-230°C in the front section and a temperature of 230-250°C in the back section to re-granulate the mixture to form master batches, and dry them for later use.

[0107] e. Using the extruder, set the temperature on the panel to 200-250°C, set the screw speed to 50r / min, the speed o...

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Abstract

The invention relates to a method for preparing a reinforced and toughened stimuli-responsive flexible packaging anti-oxidation composite film, and belongs to the technical field of anti-oxidation packaging films for foods. The method comprises the following steps: dispersing carbon nanotubes in PET through a solvent process, granulating the obtained dispersion by a double screw extruder, and casting and stretching the obtained granules to form a modified BOPET film; modifying a meso-porous nano-silicon base material, used as a carrier, with a coumarin derivative having a photodimerization effect to obtain a stimuli-responsive nano-material; and spin-coating the BOPET film with a stimuli-responsive nano-material solution containing an antioxidant through a spin-coating process to obtain the reinforced and toughened stimuli-responsive flexible packaging anti-oxidation composite film. The reinforced and toughened stimuli-responsive flexible packaging anti-oxidation composite film prepared in the invention can release the antioxidant after being irradiated with ultraviolet lights with a wavelength of 250 nm to make active substances on the surfaces of the foods keep the inhibition ofgrowth of microorganisms or prevent oxidation induced food spoilage in order to maintain the quality and the safety of the foods, so the shelf life is prolonged.

Description

technical field [0001] The invention relates to a preparation method of an anti-oxidation composite film for reinforced and toughened stimulus-responsive flexible packaging, which belongs to the technical field of food anti-oxidation packaging films. Background technique [0002] In order to prolong the shelf life of food and ensure its quality in the market, it is often necessary to use various food additives such as antibacterial agents and antioxidants in the food system. The traditional way of use is that the active ingredients of the additives added to the food system will be exhausted due to a series of complex reactions such as neutralization and decomposition, thus losing the ability to protect food. Food packaging controlled release system refers to the use of packaging materials As a delivery carrier, it releases active substances such as antibacterial agents, antioxidants, enzymes, spices and nutrients to maintain or improve food quality. The existing controlled-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J7/04C08L67/02C08K3/04C09D129/04C09D7/48C09D7/62
CPCC08J5/18C08J7/042C08J2367/02C08J2429/04C08J2479/02C08K2201/011C09D129/04C08K3/041C09D7/48C09D7/62C08K9/04C08K7/26C08K9/12C08K5/13
Inventor 丘晓琳党金贵卢立新唐有凯李飞
Owner JIANGSU SUNKEY PACKAGING
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