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Application of high molecular polymer emulsion film in protection film for fruit growth

A technology of high molecular polymer and high molecular emulsion, which is applied in the direction of protecting fruits/vegetables with a coating protective layer, which can solve the labor-intensive and time-consuming problems of fruit bagging, achieve pest erosion prevention, good ductility, and reduce labor intensity and cost effects

Inactive Publication Date: 2008-10-22
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose the application of a high molecular polymer emulsion film as a fruit growth protection film to solve the labor-intensive and time-consuming problem of fruit bagging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In a four-necked flask equipped with a stirrer, a reflux condenser and a thermometer, add 45g of deionized water and 30g of an aqueous solution containing 1g of sodium bicarbonate, 1g of potassium persulfate and 1.5g of hydroxylamine, and raise the temperature to 60-82°C under stirring , dropwise added mixed monomers (ethyl acrylate 60g, acrylonitrile 6g, acrylic acid 3g) for 3h, and kept at 82-85°C for 2 hours. The temperature was lowered to 40° C., and 5 grams of surface-treated titanium dioxide was dispersed in the obtained emulsion under high-speed stirring. Add 2g of lime milk and 1g of copper sulfate, mix evenly, and filter the discharge. The prepared polymer emulsion is dip-coated or spray-coated on the young pome fruit in May to June to form a protective film.

Embodiment 2

[0025] (1) Add 5g of water and 15g of emulsifier solution (including one gram of OP-10 and one gram of AES) into the emulsifier, start stirring, slowly add 40g of butyl acrylate, 30g of styrene and 4g of acrylic acid, emulsify for about 15 minutes, stand-by.

[0026] (2) Add 40ml of deionized water into a four-neck flask (reactor) equipped with a stirrer, condenser, thermometer and feeder, and when the temperature rises to 85°C, add (1) emulsified monomer and Initiator solution (0.5 g of potassium persulfate, 0.5 g of disodium hydrogen phosphate, 30 g of deionized water) was dropped in about 90 minutes. Raise the temperature to 88°C for 1 hour.

[0027] (3) Cool down to 40° C., and disperse 5 grams of surface-treated titanium dioxide in the emulsion under high-speed stirring.

[0028] (4) Add 3g of milk of lime and 0.5g of copper sulfate, mix well and then discharge. The prepared polymer emulsion is dip-coated or spray-coated on young apples to form a protective film.

Embodiment 3

[0030] (1) Configuration of initiator solution: potassium persulfate 0.5g, disodium hydrogen phosphate 0.5g and deionized water 30g

[0031] (2) Configuration of emulsifier solution: AES 4g, OP-10 1g and water 40g

[0032] (3) Add 40ml of deionized water and prepared emulsifier solution into a four-necked flask (reactor) equipped with a stirrer, condenser, thermometer and feeder, and when the temperature is raised to 65°C, add 45g of VAc dropwise and 1 / 3 initiator solution, keep the temperature at 70°C for two hours, then raise the temperature to 82°C, add BA 40g and 1 / 3 initiator solution dropwise, for two hours, cool down to room temperature, add St 13g and stir to swell for 12 hours , heat up to 82°C, add 1 / 3 initiator solution, react for 3 hours, then cool down to 40°C.

[0033] (4) Disperse 5 grams of surface-treated titanium dioxide in the emulsion under high-speed stirring.

[0034] (5) Add 3g of milk of lime and 0.5g of copper sulfate, mix well and then discharge. T...

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Abstract

The invention relates to the use of a high molecular polymer emulsion film as a fruit growth protective film, wherein macromolecular emulsion is synthesized through emulsion polymerization technology, then the macromolecular emulsion is used for dip-coating or spraying the young fruits, thus complete protective film can be formed on the surface of the fruits.

Description

technical field [0001] The invention relates to the application of a high molecular polymer emulsion film as a fruit growth protection film. technical background [0002] At present, in order to improve the quality of fruit in fruit tree planting in my country, fruit farmers generally adopt bagging technology, but there are many disadvantages, such as: the content of soluble solids in the fruit is reduced by 0.5-1 degrees (poor taste), time-consuming bagging (high labor intensity), and high cost ; The mouth of the bag is not easy to seal well, insects are very easy to enter, the sealing part will damage the fruit handle, and affect the nutritional supply and other defects. [0003] Also have the patent about improving fruit bagging technology to occur in recent years, be the patent of 99110086.7, 01102190.X, 03201842, 00113849.9 as application (patent) number. Among them, the first three patents all adopt different methods to improve or increase the functions of traditional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23B7/16
Inventor 刘方方顾利敏马彩霞
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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