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Nano-composite packaging material capable of inhibiting generation of endogenous formaldehyde in lentinula edodes

A nano-composite, packaging material technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of insufficient cold chain system conditions, unsatisfactory performance of packaging materials, limited practical scope, etc. The production of shiitake mushrooms, the inhibition of endogenous formaldehyde production in shiitake mushrooms, and the effects of low equipment and technical requirements

Active Publication Date: 2016-07-27
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unsatisfactory performance of the packaging materials in the traditional modified atmosphere packaging, it is difficult to control the precise composition of the gas, which will cause physiological diseases of shiitake mushrooms
However, my country's cold chain system is not in sufficient condition, and the construction of cold storage requires large investment and high energy consumption, which greatly increases the cost, making it difficult to promote it on a large scale across the country.
Different drying methods have better effects and can significantly reduce the formaldehyde content in shiitake mushrooms, but limit the related industries of fresh mushrooms and limit the practical scope
However, chemical methods still have problems in food safety and consumer acceptance due to the addition of chemical reagents.

Method used

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  • Nano-composite packaging material capable of inhibiting generation of endogenous formaldehyde in lentinula edodes
  • Nano-composite packaging material capable of inhibiting generation of endogenous formaldehyde in lentinula edodes
  • Nano-composite packaging material capable of inhibiting generation of endogenous formaldehyde in lentinula edodes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of embodiment 1 nanocomposite packaging material

[0044] Nano silver Nanjing Hitech Nano Materials Co., Ltd., model: HTB-032;

[0045] Nanometer titanium dioxide Nanjing Haitai Nano Material Co., Ltd., model: HTTi-03;

[0046] Low-density polyethylene Qilu Branch of China Petrochemical Corporation, model: TN26;

[0047] Low-density linear polyethylene Qilu Branch of China Petrochemical Corporation, model: 7042;

[0048] Anti-fogging agent masterbatch Nanjing Institute of Plastics, model: YFW-P;

[0049] SHR-10A high-speed mixer Zhangjiagang Sanxing Jiangfan Machinery Co., Ltd.;

[0050] ZC-65D co-rotating parallel twin-screw extrusion granulator Nanjing Xinhui Machinery Co., Ltd.;

[0051] PEVA double-layer co-extrusion casting machine Quanzhou Nuoda Machinery Co., Ltd.

[0052] SDD-A500 / 1200 high-speed bag making machine Shandong Zhaoyuan Plastic Printing and Packaging Machinery Factory.

[0053] 1) Nanocomposite powder

[0054] The nanocomposite powd...

Embodiment 2

[0066] Use low-density linear polyethylene (Qilu Branch of China Petrochemical Corporation, model: 7042) and low-density polyethylene (Qilu Branch of China Petroleum and Chemical Corporation, model: TN26) according to the mass ratio of 3:1 Mixing, carrying out blown film and bag making with the same specifications as the nano-packaging material, and making ordinary fresh-keeping film.

[0067] 1. Determination of physical properties

[0068] According to the test method in GB10457-2009 "Plastic self-adhesive plastic wrap for food", the physical properties of the nanocomposite plastic wrap are tested. The test indicators include tensile strength, nominal strain at break, light transmittance, right-angle tear strength, and oxygen permeability. Rate, carbon dioxide permeability, moisture permeability, self-adhesive and anti-fog. Results Table 1 shows that the mechanical toughness and strength of the nanocomposite plastic wrap have been greatly improved compared with the ordinary...

Embodiment 3

[0077] The packaging application of nanocomposite packaging materials to shiitake mushrooms and the effect of inhibiting the production of endogenous formaldehyde.

[0078] Select freshly harvested shiitake mushrooms that are free from diseases and insect pests, and cut off inedible mycelia and cultures. Place the shiitake mushrooms in a cold storage at 4°C for 24 hours, and select shiitake mushrooms with basically the same size and no mechanical damage for packaging. The packaging bags are nano-composite packaging bag sealed packaging and ordinary packaging bag sealed packaging respectively. The opening treatment of ordinary packaging bags is used as a comparison. The specifications of the three bags are 40cm long, 15cm wide, and 70cm high. Each bag contains 150g of shiitake mushrooms. Store at 4°C for 15 days. Because the mushroom cap is the main edible part of shiitake mushrooms, and the activities of GGT and C-Slyase enzymes directly affect the content of formaldehyde, so...

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Abstract

The invention discloses a nano-composite packaging material capable of inhibiting generation of endogenous formaldehyde in lentinula edodes.The nano-composite packaging material is prepared with the method including the following steps that, by mass, 15-20% of nano-composite powder, 45-50% of low-density polyethylene, 20-25% of low-density linear polyethylene, 5-10% of a dispersing agent and 3-5% of wax are taken and mixed at a high speed, the mixture is kneaded and extruded by a double-screw extruder, cooling sizing is carried out in a cold water trough, then cutting is performed, and nanometer masterbatch is obtained; by mass, 6-10% of the nanometer masterbatch, 8-12% of anti-fogging agent masterbatch and 80-85% of low-density linear polyethylene are taken and mixed evenly, the mixture is subjected to casting through a double-layer co-extrusion casting machine, and a nanometer preservative film with the thickness of 40 micrometers is formed.The nano-composite packaging material is used for packaging lentinula edodes, a high-temperature and low-oxygen environment is formed in the storage process of lentinula edodes, generation of endogenous formaldehyde in lentinula edodes is effectively inhibited, the storage quality of picked lentinula edodes is well maintained, and the quality safety of lentinula edodes is effectively controlled.

Description

technical field [0001] The invention belongs to the field of quality and safety control of agricultural products, and relates to a nanocomposite packaging material for inhibiting endogenous formaldehyde from shiitake mushrooms. Background technique [0002] my country is a big producer and exporter of edible fungi, among which shiitake mushrooms are the main edible fungi traditionally exported in my country. At present, the annual output of shiitake mushrooms in my country has reached more than 90,000 tons, accounting for more than 78% of the output of shiitake mushrooms in the world. my country's shiitake mushroom products are mainly sold to 117 countries and regions in Europe, America and Southeast Asia, accounting for 92% of the global shiitake mushroom export market. Shiitake mushrooms are delicious, have high nutritional value, and contain a variety of biologically active substances such as polysaccharides, antioxidant substances, dietary fiber, ergosterol, VB1, VB2, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L91/06C08K13/02C08K3/08C08K3/22C08K3/34C08J3/22B29C47/92B65D65/38B29C48/92
CPCB29C48/92B29C2948/92704B65D65/38C08J3/226C08J2323/08C08J2423/06C08K2201/011C08L23/0815C08L2203/16C08L2205/02C08L2205/03C08L23/06C08L91/06C08K13/02C08K2003/0806C08K2003/2241C08K2003/2227C08K3/36
Inventor 赵立艳胥佳佳苏倩倩冯鑫胡秋辉
Owner NANJING AGRICULTURAL UNIVERSITY
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