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Gas-barrier moisture-permeable film containing sulfonated polyaromatic ether polymer as well as preparation method and application thereof

A technology of polymers and aromatic ethers, applied in the direction of chemical instruments and methods, applications, special packaging objects, etc., can solve the problems of complicated process, moisture permeability that cannot be changed with humidity, and high price, and achieve a tight molecular structure and good Oxygen barrier properties, effects of excellent gas barrier properties

Inactive Publication Date: 2020-09-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature-sensitive and moisture-permeable membrane is prone to condensation on the surface of the membrane under high humidity and low temperature; the silicon filter membrane has a moisturizing function, but the moisture permeability cannot be changed with humidity; The performance meets the requirements, but the preparation process is not environmentally friendly, the process is complicated, and there may be problems with excessive chlorine content in the processing process
[0004] CN105986511A patent discloses the technology of applying natural polymers with good hydrophilic water retention and film-forming properties on base paper with high dry and wet strength, but the cost is relatively high
CN104029449B patent discloses a coating film with large moisture permeability, the base layer is an expanded polytetrafluoroethylene film layer, and the coating is a polyurethane emulsion copolymer coating containing hemp stalk core ultrafine powder. Used for car lamp housings, but does not have intelligent humidity control performance
CN103507339A patent discloses a moisture-sensing and moisture-permeable film, which is regenerated cellulose kept in a non-woven substrate, but does not have gas barrier properties
CN103107301A discloses an inorganic coating lithium-ion battery diaphragm, which includes a multilayer structure, which is a porous flexible bottom film and coatings coated on both sides of the bottom film. The coating contains polyvinyl alcohol and zeolite particles. The patent coating The auxiliary components do not contain metal salts, and the composite membrane does not have the function of intelligent moisture control
CN1864829A discloses a hydrophilic-hydrophobic bipolar composite membrane and its preparation method. The membrane has a double-layer structure, the bottom layer is a porous support layer, and the upper layer is a hydrophilic membrane containing lithium chloride. The membrane has high moisture permeability and It has a strong blocking effect on other gas molecules, but it does not have intelligent humidity control
WO2012133805A1 discloses a moisture-permeable membrane, the porous substrate is preferably polytetrafluoroethylene, which is expensive, and the high moisture-permeable performance of the membrane is not good
US20030054155A1 discloses a waterproof and moisture-permeable composite membrane, the hydrophobic layer is polytetrafluoroethylene, and the hydrophilic layer is polyurethane. The membrane has high moisture permeability, but does not have intelligent moisture control performance

Method used

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  • Gas-barrier moisture-permeable film containing sulfonated polyaromatic ether polymer as well as preparation method and application thereof
  • Gas-barrier moisture-permeable film containing sulfonated polyaromatic ether polymer as well as preparation method and application thereof
  • Gas-barrier moisture-permeable film containing sulfonated polyaromatic ether polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 2kg of polypropylene (F1002B, Sinopec Yangzi Petrochemical) was stretched into a porous film (the average pore size of the porous film is 2 microns) on a film uniaxial stretching machine (Guangzhou Putong, MESI-LL). Add 5 g of sulfonated polyethersulfone (number average molecular weight: 65,000, ion exchange capacity: 1.86) having the structure of formula (I) into 95 g of formic acid and fully dissolve. Add 2.1g of lithium chloride and 0.2g of nano-zinc oxide into the obtained solution, and stir well until the mixture is uniform. The solution was evenly brushed on one surface of the polypropylene porous film, then placed in an oven, and dried at 70° C. for 10 minutes to obtain a gas-barrier and moisture-permeable film (A1). Wherein, the thickness of the polypropylene supporting layer is 25 microns, and the thickness of the functional layer is 10 microns.

Embodiment 2

[0041] 2kg of polypropylene (F1002B, Sinopec Yangzi Petrochemical) was stretched into a porous film (the average pore size of the porous film is 2 microns) on a film uniaxial stretching machine (Guangzhou Putong, MESI-LL). Add 7g of sulfonated polyethersulfone (number-average molecular weight: 58,000, ion exchange capacity: 2.10) having the structure of formula (II) into 93g of ethylene glycol monomethyl ether, and fully dissolve it. Add 1.4g of lithium fluoride and 0.2g of nano-zinc oxide (Bahringwei, 99.5%, particle size 10-30nm) into the obtained solution, and fully stir until mixed evenly. Brush this solution evenly on one surface of the polypropylene porous film, then place it in an oven, and dry it at 70° C. for 10 minutes to obtain a gas-barrier and moisture-permeable film (A2). Wherein, the thickness of the polypropylene supporting layer is 25 microns, and the thickness of the functional layer is 12 microns.

Embodiment 3

[0043] 2kg of polypropylene (F1002B, Sinopec Yangzi Petrochemical) was stretched into a porous film (the average pore size of the porous film is 2 microns) on a film uniaxial stretching machine (Guangzhou Putong, MESI-LL). Add 9g of sulfonated polyethersulfone (number-average molecular weight: 80,000, ion exchange capacity: 1.67) having the structure of formula (III) into 91g of N,N-dimethylformamide, and fully dissolve it. Add 2.7g of attapulgite (Bailingwei, 10nm in diameter and 1 micron in length) and 0.2g of nano-zinc oxide (Bailingwei, 99.5%, 10-30nm in particle size) into the obtained solution, and stir until they are evenly mixed. Brush this solution evenly on one surface of the polypropylene porous film, then place it in an oven, and dry it at 70° C. for 10 minutes to obtain a gas-barrier and moisture-permeable film (A3). Wherein, the thickness of the polypropylene support layer is 25 microns, and the thickness of the functional layer is 13 microns.

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Abstract

The invention discloses a gas-barrier moisture-permeable film containing a sulfonated polyaromatic ether polymer. The film comprises a supporting layer and a functional layer, the supporting layer hasa single-layer structure, and the functional layer is arranged on one side of the supporting layer or two sides of the supporting layer at the same time. The supporting layer is a porous film and ismade of polyethylene, polypropylene or a composition of polyethylene and polypropylene; the functional layer is a compact film and comprises a sulfonated polyaromatic ether polymer and an inorganic moisture absorbent. The invention also discloses a preparation method of the moisture-permeable film. The moisture-permeable film is used for a fruit and vegetable box with a fresh-keeping function anda refrigerator with the fresh-keeping fruit and vegetable box. The film has air-blocking and moisture-permeable capabilities, and has excellent moisture permeability when the relative humidity is high, so that fruits and vegetables can be prevented from condensation and rot. On the other hand, the film is good in gas-barrier property, and fruits and vegetables are prevented from quickly rotting inthe presence of oxygen.

Description

technical field [0001] The present invention relates to the field of films, in particular to a gas-barrier and moisture-permeable film containing sulfonated polyaryl ether polymers and its preparation method and application. The composite film can be used in fresh-keeping storage boxes in refrigerators Effectively extend the preservation time of vegetables and fruits. Background technique [0002] Fruits and vegetables are important foods for human beings, and they are the main sources for people to obtain basic nutrients (vitamins, substances, complex carbohydrates, etc.). With the improvement of people's living standards, the requirements for the freshness of fresh fruits and vegetables are getting higher and higher. Fruits and vegetables can continue to carry out life activities such as respiration and transpiration after harvesting, and water loss and nutrient consumption will occur during storage. For every 10°C increase in temperature, the respiratory intensity of fr...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B3/24B32B27/32B32B27/28B32B27/20B32B33/00B29D7/01B65D65/40B65D81/24A23B7/159C08J9/36C09D181/06C09D7/61C08L23/12
CPCA23B7/159B29D7/01B32B3/266B32B27/08B32B27/20B32B27/285B32B27/32B32B33/00B32B2250/02B32B2250/03B32B2250/24B32B2250/40B32B2270/00B32B2307/7145B32B2307/7244B32B2307/7246B32B2307/73B32B2439/70B65D65/40B65D81/24C08J9/365C08J2323/12C08J2481/06C08K2003/2296C08K2201/011C09D181/06C09D7/61C08K3/22C08K3/16
Inventor 张杨郑萃宋建会唐毓婧姚雪容潘国元刘轶群张韬毅
Owner CHINA PETROLEUM & CHEM CORP
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