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1-methylcyclopropene preservative paper and preparation method thereof

A technology of methylcyclopropene and fresh-keeping paper, which is applied in the fields of fruit and vegetable fresh-keeping, paper, papermaking, etc. It can solve the problems of difficult large-scale rapid storage, inconvenient use, complicated operation, etc., and achieve easy control of product quality and environmental protection in the production process , The effect of simple process

Active Publication Date: 2017-01-04
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, tablet 1-MCP and liquid 1-MCP both at home and abroad have good fresh-keeping effects, but there are still problems such as inconvenient use, difficult operation and instability.
1-MCP tablets need airtight conditions and airtight fumigation for 6-12 hours in the application process, the operation is complicated, and it is not easy to store quickly on a large scale; liquid 1-MCP has poor stability at room temperature, and it needs to be stored at low temperature to ensure 1-MCP stability

Method used

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  • 1-methylcyclopropene preservative paper and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: degrade amylose by a-amylase, control the degree of polymerization at 100, and then undergo substitution reaction with 2,3-epoxypropyltrimethylammonium chloride, control the degree of substitution to 0.1 to obtain modified amylose .

[0025] Step 2, preparation of 1-methylcyclopropene inclusion complex: pass 1-MCP gas into the 8% modified amylose solution obtained in step 1, adjust pH=4 and temperature 5°C, and precipitate 1 -Starch crystals of MCP, the mass percentage of 1-MCP in the inclusion complex is controlled to be 0.10%.

[0026] Step 3, preparation of coating: Weigh 100 parts of starch crystals obtained in step 2, and weigh 8 parts of water-absorbing agent, 5 parts of dispersant, and 5 parts of slow-release agent, add polyethylene glycol with an average molecular weight of 4000, and heat In the melt, stir and disperse at 800r / min, and put it into the paint storage barrel for later use.

[0027] Step 4, preparation of base paper layer: take bamboo pulp...

Embodiment 2

[0031] Step 1: degrade amylose by a-amylase, control the degree of polymerization at 150, and then undergo substitution reaction with 2,3-epoxypropyltrimethylammonium chloride, control the degree of substitution to 0.3 to obtain modified amylose .

[0032] Step 2, preparation of 1-methylcyclopropene inclusion complex: 1-MCP gas is passed into the 10% modified amylose solution obtained in step 1, and the pH is adjusted to 4.5 and the temperature is 10°C, and the encapsulation 1 -MCP starch crystals, the mass percentage of 1-MCP in the inclusion complex is controlled to be 0.12%.

[0033] Step 3, preparation of coating: Weigh 100 parts of starch crystals obtained in step 2, and weigh 10 parts of water-absorbing agent, 8 parts of dispersant, and 8 parts of slow-release agent, add polyethylene glycol with an average molecular weight of 4000, and heat In the melt glue, stir and disperse at 900r / min, and put it into the paint storage barrel for later use.

[0034] Step 4, preparat...

Embodiment 3

[0038] Step 1: degrade amylose by a-amylase, control the degree of polymerization at 200, and then undergo substitution reaction with 2,3-epoxypropyltrimethylammonium chloride, control the degree of substitution to 0.5 to obtain modified amylose .

[0039] Step 2, preparation of 1-methylcyclopropene inclusion complex: 1-MCP gas is passed into the 12% modified amylose solution obtained in step 1, and the pH is adjusted to 5.0 and the temperature is 10°C, and the encapsulation 1 -Starch crystals of MCP, the mass percentage of 1-MCP in the inclusion complex is controlled to be 0.16%.

[0040] Step 3, preparation of coating: Weigh 100 parts of starch crystals obtained in step 2, and weigh 15 parts of water-absorbing agent, 10 parts of dispersant, and 10 parts of slow-release agent, add polyethylene glycol with an average molecular weight of 4000, and heat In the melt, stir and disperse at 700r / min, and put it into the paint storage bucket for later use.

[0041] Step 4, preparat...

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Abstract

The invention discloses 1-methylcyclopropene preservative paper which comprises a base paper layer and a preservative layer, wherein the surface of the base paper layer is coated with the preservative layer. The base paper layer is mainly prepared from bamboo pulp and hardwood pulp in a mixed manner, and main components of the preservative layer comprise 1-methylcyclopropene inclusion compounds, polyethylene glycol hot melt glue, water absorbing agents, dispersing agents and slow release agents. The invention further discloses a preparation method of the 1-methylcyclopropene preservative paper. The preparation method includes the steps: preparing the 1-methylcyclopropene inclusion compounds; formulating paint; preparing the base paper layer; coating; drying. The 1-methylcyclopropene preservative paper is good in preservation effect and environmental compatibility, convenient to use and stable in effect and has excellent applicability in the storage and transportation process.

Description

technical field [0001] The invention belongs to the field of special paper, and in particular relates to a 1-methylcyclopropene fresh-keeping paper and a preparation method thereof. Background technique [0002] With the improvement of the quality of life, people have a higher consumption demand for seasonal and fresh fruits and vegetables. my country's fruit planting area and fruit output have always ranked first in the world, but fruit and vegetable products have high moisture content and are easy to rot. At this stage, my country's fresh fruits and vegetables are due to improper harvesting, backward post-harvest commercial processing technology, improper storage and transportation conditions, and storage and processing capabilities. Insufficient and other reasons, the rot loss rate caused by fruit has reached 30%, vegetables have reached 30-40%, while the loss rate in developed countries is less than 7%. Therefore, it is very important to adopt effective fresh-keeping tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/10D21H11/12D21H19/10D21H21/14D21H21/08D21H27/10A23B7/159C08B33/04
CPCA23B7/159A23V2002/00C08B33/04D21H11/12D21H15/10D21H19/10D21H21/08D21H21/14D21H27/10A23V2200/10A23V2250/30
Inventor 胡志军张学金陈华金光范
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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