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An environment-friendly food packaging film production technology with accelerated freezing function

A technology of food packaging film and production technology, which is applied in the field of food packaging materials, can solve the problem of single function of film materials, and achieve the effect of reducing supercooling temperature

Active Publication Date: 2022-06-07
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The patent (publication number CN211280029U, published on August 18, 2020) discloses "a degradable plastic film", which uses a high-strength starch composite film, a light-gathering film, a heat-stable film and an antibacterial layer to prepare a degradable plastic film. Degradable plastic film, but the film material has a single function

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021]According to the well-known method, wheat bran is deenzed, crushed, de-starched and deproteinized, and then compared with 1.5M NaOH and 2.0M urea mixture is evenly mixed, formulated into a mass volume concentration of 5% of the mixture, stirred at 25 ° C for 8 ~ 12 h, after the end of the reaction at 5000 rpm centrifugation for 10 min to take the supernatant; anhydrous ethanol is added to the solution to a volume concentration of 40%, 8000 rpm centrifugation 20 min to take the supernatant, continue to add anhydrous ethanol to the volume concentration to 50%, repeat the centrifugation process, to obtain a polysaccharide precipitate at a 50% ethanol volume concentration; the precipitation is resuspended with pure water, dialyzed at 4 °C for 48 to 72 h, and the resulting solution is lyophilized to prepare a 50% alcohol concentration of AX ； Dissolve AX in dimethyl sulfoxide and formulate into a solution with a mass volume concentration of 4%; Adjust the pH of the solution to 8....

Embodiment 2

[0023]Wheat bran AX extraction process is the same as Example 1, the alcohol deposit concentration is 30%; Triethylamine solution pH adjusted to 8.0, AX and OSA molar ratio of 2, centrifugation, precipitation, rinsing, dry coal process with Example 1; The modified AX is formulated into a solution with a mass volume concentration of 2%, degassing, casting film, drying process with Example 1; AX soaking with Example 1, adding a volume concentration of 0.06% trichlorovinyl silane solution, reaction, rinsing, drying process with Example 1; AX base film and butanthiol light control reaction process is the same as Example 1, ultraviolet treatment conditions of 300W power irradiation for 4min, rinsing, drying process with Example 1; Α-Al with a particle size of 10 nm 2 O 3 The particles are mixed with 50mL hexane, formulated into a solution with a mass volume concentration of 0.2%, silicone rubber mixing, ultrasonic, spraying, drying process with Example 1; The surface of the membrane ca...

Embodiment 3

[0025] Wheat bran AX extraction process is the same as Example 1, the alcohol sediment concentration is 70%; Triethylamine solution pH adjusted to 9.0, AX and OSA molar ratio of 12, centrifugation, precipitation, rinsing, drying process with Example 1; The modified AX is formulated into a solution with a mass volume concentration of 4%, degassing, casting film, drying process with Example 1; AX soaking with Example 1, adding a volume concentration of 0.12% trichlorovinylsilane solution, reaction, rinsing, drying process with Example 1; AX base film and butanethiol light control reaction process is the same as Example 1, ultraviolet treatment conditions of 500W power irradiation for 7min, rinsing, drying process with Example 1; A α-Al with a particle size of 30 nm 2 O 3 The particles are mixed with 50mL hexane, formulated into a solution with a mass volume concentration of 0.4%, silicone rubber mixing, ultrasonic, spraying, drying process with Example 1; The surface of the membrane...

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PUM

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Abstract

The invention relates to an environment-friendly food packaging film production technology with accelerated freezing function, which belongs to the field of food packaging materials. It is characterized in that wheat bran is used as the main raw material, and the AX base film is obtained after extraction, modification and casting of arabinoxylan (AX); the surface functionalization of the film is realized by light-controlled hydrophobic modification and fixed ice nucleating agent, An environment-friendly food packaging film with accelerated freezing function is prepared. The packaging film produced by the invention has the functions of anti-icing, anti-fouling, accelerated freezing and degradability, and can be used as a packaging material for frozen food.

Description

First, the technical field [0001] The present invention relates to an environmentally friendly food packaging film production technology having an accelerated freezing function, belonging to the field of food packaging materials. 2. Background technology [0002] Plastic film material packaging performance is good, low manufacturing cost, is still the most widely used, the largest amount of food packaging materials, but the refractory characteristics of plastics have caused great pressure on the ecological environment. Degradable biopolymers have good application prospects in packaging materials, among which polysaccharides, as a representative bio-based material, have superior degradability. However, the membrane material prepared by polysaccharide polymers is hydrophilic and has poor mechanical properties, although the mechanical properties have been improved after the addition of plasticizers, the hydrophilicity of the membrane has increased, and it is difficult to use in a hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08J7/04C08L5/14C09D183/04C09D7/61
CPCC08J7/12C08J7/0427C09D183/04C09D7/61C08J2305/14C08J2483/04C08K2003/2227Y02W90/10
Inventor 王沛王光正顾振新杨润强姜东
Owner NANJING AGRICULTURAL UNIVERSITY
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