Fabrication of transparent clay-polymer hybrid coatings on PET film to enhance flame retardancy and oxygen barrier properties

Polymeric barrier materials are critical in contemporary industries for food, medicine, and chemical packaging. However, these materials, such as PET films, are impeded by the optimization of barrier properties by virtue of molecular design. Herein, a new methyl methacrylate-methyl acrylate-diallyl maleate-maleic acid (MMA-MAc-DAM-MA) was synthesized to tailor the surface properties of PET films for maximizing oxygen barrier properties. During the MMA-MAc-DAM-MA coating and curing process, the chemical structure evolutions of MMA-MAc-DAM-MA coatings were characterized, indicating that the cross-linking conversion and proportion of –COOH groups are critical for the oxygen barrier properties of coatings. The inherent –COOH groups are transformed into designed structures, including intramolecular anhydride, inter-chain anhydride and retained carboxylic acid. Therein, the inter-chain anhydride restraining the activity of coated polymer chain mainly contributes to enhanced barrier properties. The thermal properties of novel coatings were analyzed, revealing that the curing behavior is strongly dependent on the curing temperatures. The impacts of viscosity of the coating solution, coating velocity, and coating thickness on the oxygen permeability (Po2) of the coatings were investigated using a gas permeability tester to explore the optimum operating parameters during practical applications, which can reduce the Po2 of PET film by 47.8%. This work provides new insights on advanced coating materials for excellent barrier performance.

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Nano-Brick Wall Architectures Account for Super Oxygen Barrier PET Film by Quadlayer Assembly of Polyelectrolytes and α-ZrP Nanoplatelets

Polymers ◽

10.3390/polym10101082 ◽

2018 ◽

Vol 10 (10) ◽

pp. 1082 ◽

Cited By ~ 6

Author(s):

Dongmei Han ◽

Yiqing Luo ◽

Qing Ju ◽

Xujing Xiao ◽

Min Xiao ◽

...

Keyword(s):

Zirconium Phosphate ◽

Food Packaging ◽

Transmission Rate ◽

Composite Films ◽

Barrier Properties ◽

Oxygen Barrier ◽

Brick Wall ◽

Oxygen Transmission Rate ◽

Repeat Units ◽

Pet Film

Nanobrick wall hybrid coating with super oxygen barrier properties were fabricated on polyethylene terephthalate (PET) film using a quadlayer (QL) assembly of polyelectrolytes and nanoplateles. A quadlayer assembly consists of three repeat units of polyacrylic acid (PAA), poly (dimethyl diallyl ammonium chloride) (PDDA) and layered α-zirconium phosphate (α-ZrP). PDDA with positive charges can assemble alternatively with both α-ZrP and PAA with negative charges to form nanobrick wall architectures on the surface of PET film via the electrostatic interaction. The lamellar structure of α-ZrP platelets and the dense QL assembly coating can greatly reduce the oxygen transmission rate (OTR) of PET film. Compared to pristine PET film, the OTR of PET (QL)19 is reduced from 57 to 0.87 cc/m2/day. Moreover, even with 19 QLs coating, PET (QL)19 composite film is still with an optical transparency higher than 90% and a haze lower than 10%. Therefore, the transparent PET (QL)n composite films with super oxygen barrier properties show great potential application in food packaging and flexible electronic packaging.

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Effect of molecular weight and annealing temperature on the oxygen barrier properties of oriented PET film

Polymer Bulletin ◽

10.1007/bf00263943 ◽

1988 ◽

Vol 19 (4) ◽

Cited By ~ 10

Author(s):

William Perkins

Keyword(s):

Molecular Weight ◽

Annealing Temperature ◽

Barrier Properties ◽

Oxygen Barrier ◽

Pet Film

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Bioplastic films with unusually good oxygen barrier properties based on potato fruit-juice

RSC Advances ◽

10.1039/d1ra01178b ◽

2021 ◽

Vol 11 (21) ◽

pp. 12543-12548

Author(s):

Simi Poulose ◽

Ilari Jönkkäri ◽

Mikael S. Hedenqvist ◽

Jurkka Kuusipalo

Keyword(s):

Waste Management ◽

Industrial Waste ◽

Fruit Juice ◽

Potato Starch ◽

Barrier Properties ◽

Oxygen Barrier ◽

Industrial Waste Management ◽

Starch Industry

Valorization of potato fruit juice, a potato starch industry by-product, by developing biopolymer films that could replace petroleum based alternatives in packaging, providing a greener and sustainable solution to industrial waste management.

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Diamine vapor treatment of viscoelastic graphene oxide liquid crystal for gas barrier coating

Scientific Reports ◽

10.1038/s41598-021-88955-5 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Seung Eun Choi ◽

Sung-Soo Kim ◽

Eunji Choi ◽

Ji Hoon Kim ◽

Yunkyu Choi ◽

...

Keyword(s):

Graphene Oxide ◽

Liquid Crystal ◽

Diffusion Length ◽

Barrier Properties ◽

Gas Barrier ◽

Barrier Coating ◽

Coating Method ◽

Gas Molecules ◽

Pet Film ◽

Vapor Treatment

AbstractA layered graphene oxide/ethylenediamine (GO/EDA) composite film was developed by exposing aqueous GO liquid crystal (GOLC) coating to EDA vapor and its effects on the gas barrier performance of GO film were systematically investigated. When a GO/EDA coating with a thickness of approximately 1 μm was applied to a neat polyethylene terephthalate (PET) film, the resultant film was highly impermeable to gas molecules, particularly reducing the gas permeance up to 99.6% for He and 98.5% for H2 in comparison to the neat PET film. The gas barrier properties can be attributed to the long diffusion length through stacked GO nanosheets. The EDA can crosslink oxygen-containing groups of GO, enhancing the mechanical properties of the GO/EDA coating with hardness and elastic modulus values up to 1.14 and 28.7 GPa, respectively. By the synergistic effect of the viscoelastic properties of GOLC and the volatility of EDA, this coating method can be applied to complex geometries and EDA intercalation can be spontaneously achieved through the scaffold of the GOLC.

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