Polyvinylidene chloride/graphene composite material with barrier property and electrical conductivity and preparation method thereof

A polyvinylidene chloride and composite material technology, which is applied in the field of polyvinylidene chloride/graphene composite material and its preparation, can solve the problems that the sealing barrier performance needs to be improved, the electrical conductivity is not provided, and the antistatic property cannot be used, and the like, It is beneficial to popularization and application, the process is easy to control, and the barrier performance is improved.

Active Publication Date: 2016-01-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing PVDC film or PVDC composite film has relatively good properties of oxygen barrier, vapor barrier and odor barrier, in order to adapt to some special products, such as the packaging of special medicines, the sealing of the existing PVDC film or PVDC composite film Barrier performance still needs to be improved
In addition, the existing PVDC film or PVDC composite film is usually made of plastic as the base material, which only has a single barrier property, does not have conductivity, and cannot be used for packaging of electronic products that require antistatic and electromagnetic shielding. Functions still need to be further expanded and improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add 0.1kg of graphene oxide and 100kg of deionized water into the ultrasonic irradiation reactor, and ultrasonically disperse it under the conditions of ultrasonic power of 100W and frequency of 1000Hz until graphene oxide is evenly dispersed in deionized water to obtain graphite oxide Graphene dispersion, adding 300kg of polyvinylidene chloride (PVDC) emulsion with a solid content of 10%, ultrasonically mixing the graphene oxide dispersion and PVDC emulsion under the aforementioned conditions to obtain a stable composite emulsion;

[0029] (2) the composite emulsion obtained in step (1) is coated on the polyethylene terephthalate film (polyester film, referred to as PET film) through corona pretreatment by dry composite process, the coating of composite emulsion The cloth weight is 3g / m 2 , placing the PET film coated with the composite emulsion in a far-infrared dryer and drying it for 2 minutes under the condition of 300W to obtain a PVDC / graphene oxide / PET compo...

Embodiment 2

[0037] (1) Add 5 kg of graphene oxide and 100 kg of deionized water into the ultrasonic irradiation reactor, and ultrasonically disperse it under the conditions of ultrasonic power of 500W and frequency of 10000Hz until graphene oxide is evenly dispersed in deionized water to obtain graphene oxide Dispersion, add 300kg of PVDC emulsion with a solid content of 80% to the graphene oxide dispersion, mechanically stir until the graphene oxide dispersion and PVDC emulsion are evenly mixed, then add additives 1-dodecanol 0.01kg, sodium acetate 2.4kg , and mechanically stir and mix evenly to obtain a stable composite emulsion;

[0038] (2) On one side of the PET film, evenly coat the polyurethane adhesive, then the composite emulsion obtained by step (1) is coated on the polyurethane adhesive by a dry coating process, and the coating amount of the composite emulsion is 1.5g / m 2 , place the PET film after coating the composite emulsion in a far-infrared dryer and dry it for 2min und...

Embodiment 3

[0042] (1) Add 10 kg of graphene oxide and 100 kg of deionized water into the ultrasonic irradiation reactor, and ultrasonically disperse it under the condition of ultrasonic power of 5000 W and frequency of 50000 Hz until graphene oxide is evenly dispersed in deionized water to obtain graphene oxide Dispersion, add 150kg of PVDC emulsion with a solid content of 60% to the graphene oxide dispersion, mechanically stir until the graphene oxide dispersion and PVDC emulsion are evenly mixed, then add 1kg of additive 2-ethylethanol, and mechanically stir to mix evenly , to obtain a stable composite emulsion;

[0043] (2) the compound emulsion obtained in step (1) is coated on the PET film through corona pretreatment by dry compound process, and the coating amount of the compound emulsion is 20g / m 2 , the PET film coated with the composite emulsion is placed in a far-infrared dryer and dried for 4 minutes under the condition of 300W to obtain a PVDC / graphene oxide / PET composite film...

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Abstract

The invention provides a polyvinylidene chloride / graphene composite material with barrier property and electrical conductivity. The polyvinylidene chloride / graphene composite material is composed of a substrate and a polyvinylidene chloride / graphene composite material layer covering the substrate, or is composed of a substrate and an adhesive layer and a polyvinylidene chloride / graphene composite material layer covering the substrate in order. The polyvinylidene chloride / graphene composite material layer consists of polyvinylidene chloride and graphene. The preparation method includes: (1) dispersing graphene oxide uniformly in a solvent to form a graphene oxide dispersion solution, adding a polyvinylidene chloride emulsion and mixing the materials evenly to obtain a composite emulsion; (2) coating the substrate subjected to corona treatment or pre-coated with an adhesive with the composite emulsion, and performing drying to obtain a polyvinylidene chloride / graphene composite material; and (3) employing a reducing agent to reduce the graphene oxide in the polyvinylidene chloride / graphene composite material into grapheme, performing drying, then conducting curing at 30-45DEG C for 1-3 days, thus obtaining the polyvinylidene chloride / graphene composite material with barrier property and electrical conductivity.

Description

technical field [0001] The invention belongs to the field of polyvinylidene chloride composite materials, in particular to a polyvinylidene chloride / graphene composite material with barrier properties and conductivity and a preparation method thereof. Background technique [0002] Polyvinylidene chloride (PVDC) is a copolymer made of vinylidene chloride monomer as the main component and a small amount of other monomers. PVDC molecules have a high degree of symmetry and regularity, strong intermolecular cohesion, and crystallinity. High, the chlorine atoms in the molecule are hydrophobic and will not form hydrogen bonds. In addition, the molecular weight of vinylidene chloride is large, and oxygen molecules and water molecules are difficult to move in polyvinylidene chloride molecules, so it has excellent barrier properties. PVDC film is a packaging material with high barrier property, strong toughness, low-temperature heat sealing and good chemical stability. Traditional PVD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B27/06B32B27/12B32B27/30B32B37/12B32B37/15B32B38/00
CPCB32B9/007B32B27/06B32B27/12B32B27/304B32B37/12B32B37/15B32B38/164B32B2307/21B32B2307/212B32B2307/7242B32B2307/73
Inventor 夏和生补强
Owner SICHUAN UNIV
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