scholarly journals Polyacrylate Decorating Poly(ethylene terephthalate) (PET) Film Surface for Boosting Oxygen Barrier Property

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1451
Author(s):  
Wen Zhong ◽  
Xiaobin Yang ◽  
Jikun Sun ◽  
Hongwei Gao ◽  
Yongping Bai ◽  
...  
Keyword(s):  
Gas Permeability ◽  
Film Surface ◽  
Barrier Properties ◽  
Optimum Operating ◽  
Oxygen Barrier ◽  
Properties Of Coatings ◽  
Coating Materials ◽  
Barrier Materials ◽  
Pet Film ◽  
Pet Films

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.

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

2020 ◽  
Vol 147 ◽  
pp. 105788 ◽  
Author(s):  
Xiaowei Meng ◽  
Peng Qi ◽  
Jun Sun ◽  
Hongfei Li ◽  
Sheng Zhang ◽  
...  
Keyword(s):  
Flame Retardancy ◽  
Barrier Properties ◽  
Hybrid Coatings ◽  
Oxygen Barrier ◽  
Polymer Hybrid ◽  
Pet Film

scholarly journals Transparent Pullulan/Mica Nanocomposite Coatings with Outstanding Oxygen Barrier Properties

2017 ◽  
Author(s):  
Ilke Uysal Unalan ◽  
Derya Boyaci ◽  
Silvia Trabattoni ◽  
Silvia Tavazzi ◽  
Stefano Farris
Keyword(s):  
Barrier Properties ◽  
Nanocomposite Films ◽  
Nanocomposite Coatings ◽  
Oxygen Barrier ◽  
Barrier Materials ◽  
Kinetic Coefficients ◽  
Environmental Relative Humidity ◽  
Dry Conditions ◽  
Functional Features ◽  
Clay Layers

This study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α) at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt%, which is ϕ ≈ 0.00008) in pullulan coatings dramatically improved the oxygen barrier performance of the nanocomposite films under dry conditions, whereas this performance was partly lost as the environmental relative humidity (RH) increased. This outcome was explained in terms of the perturbation of the spatial ordering of mica sheets within the main pullulan phase because of RH fluctuations, as confirmed by modelling of the experimental OTR data according to Cussler’s model. The presence of the synthetic nanobuilding block (NBB) led to a decrease in both static and kinetic coefficients of friction compared with neat PET (≈12% and 23%, respectively) and PET coated with unloaded pullulan (≈ 26% reduction in both coefficients). In spite of the presence of the filler, all of the coating formulations did not significantly impair the overall optical properties of the final material, which exhibited haze values below 3% and transmittance above 85%, with the only exception represented by the formulation with the highest loading of mica (1.5 wt%, which is ϕ ≈ 0.01). These findings revealed, for the first time, the potential of the NBB mica to produce nanocomposite coatings in combination with biopolymers for the generation of new functional features, such as transparent high oxygen barrier materials.

Esterified lignin coating as water vapor and oxygen barrier for fiber-based packaging

Holzforschung ◽  
2013 ◽  
Vol 67 (8) ◽  
pp. 899-905 ◽  
Author(s):  
Eva-Lena Hult ◽  
Klaus Koivu ◽  
Janne Asikkala ◽  
Jarmo Ropponen ◽  
Pauli Wrigstedt ◽  
...  
Keyword(s):  
Water Vapor ◽  
Transmission Rate ◽  
Gel Permeation Chromatography ◽  
Barrier Properties ◽  
Resonance Spectroscopy ◽  
Oxygen Barrier ◽  
Continuous Film ◽  
Barrier Materials ◽  
Oxygen Transmission Rate ◽  
Moisture Barrier Property

Abstract Lignin, esterified with palmitic and lauric acid chloride, has been studied for the application as coating on fiber-based packaging material. The aim was to improve the barrier properties against water vapor and oxygen of paperboard. The esterification was followed by Fourier transform infrared spectroscopy, 31P nuclear magnetic resonance spectroscopy, and gel permeation chromatography measurements. The lignin esters were applied on paperboard and formed a continuous film. The moisture barrier property of the coated paperboards was characterized by the water vapor transmission rate (WVTR). A significant decrease in WVTR was observed, for example, 40 g m-2 (for 24 h) for a paperboard coated with 10.4 g m-2 hardwood kraft lignin palmitate. The contact angle of water on the lignin ester coatings was high and stable. For all paperboard samples coated with lignin esters, a significant decrease in oxygen transmission rate was observed. Accordingly, lignin palmitate and laurate have a high potential as a barrier materials in packaging applications.

The Morphology of SiOx Coated PET Film by Ultrasonic Atomic Force Microscopy and Barrier Properties

2011 ◽  
Vol 295-297 ◽  
pp. 1600-1605
Author(s):  
Gai Mei Zhang ◽  
Qiang Chen ◽  
Cun Fu He ◽  
Shou Ye Zhang
Keyword(s):  
Transmission Rate ◽  
Film Surface ◽  
Chemical Vapor ◽  
Barrier Properties ◽  
Rf Plasma ◽  
Force Microscopy ◽  
Oxygen Transmission Rate ◽  
Biaxially Oriented Polypropylene ◽  
Stretching Vibration ◽  
Pet Film

The oxygen transmission rate (OTR) of SiOx coated polyethylene terephthalate (PET) and biaxially oriented polypropylene (BOPP) affected by fine defects is discussed in this paper. With an ultrasonic AFM (UAFM), which is an advantageous to distinguishing tiny defects on/ in the deposited films, it is found that the OTR of the coated films is relevant to the morphology scanned by UAFM. Herein SiOx layers with a thickness in the order of nano-scale were fabricated in 13.56 MHz-radio frequency (RF) -plasma-enhanced chemical vapor deposition (PECVD). The monomer for the coating fabrication is hexamethyldisiloxane (HMDSO). Fourier transform inferred (FTIR) spectra of the deposited coating with a strong peak at 1062 cm-1, corresponding to Si-O-Si stretching vibration, confirm the formation of SiOx coatings through PECVD. The higher OTR value of SiOx coated PET is consistence with defects on film surface and in the subsurface of coatings through UAFM. It obtains that the OTR value of the defect free SiOx coated film was reduced by ca. 89% compared with the defect existence SiOx coated PET.

scholarly journals Preparation, characterization, and oxygen barrier properties of regenerated cellulose/polyvinyl alcohol blend films

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2735-2746
Author(s):  
Qianqian Zhu ◽  
Jingjing Wang ◽  
Jianzhong Sun ◽  
Qianqian Wang
Keyword(s):  
Polyvinyl Alcohol ◽  
Gas Permeability ◽  
Composite Films ◽  
Casting Process ◽  
Barrier Properties ◽  
Tensile Tests ◽  
Urea Solution ◽  
Regenerated Cellulose ◽  
Oxygen Barrier ◽  
Blend Films

The application of cellulose materials for packaging usage has attracted a large amount of attention in recent years. In this study, cellulose was dissolved in a cold NaOH/urea solution. Transparent, strong, and flexible regenerated cellulose/polyvinyl alcohol (PVOH) films were fabricated via a solution blending and casting process. The physicochemical properties of the neat RC films, PVOH films, and RC-PVOH blend films were characterized via scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, tensile tests, gas permeability, and ultraviolet-visible spectroscopy. The results of the physicochemical characterizations indicated that the RC-PVOH composite films with various PVOH contents yielded strong properties in terms of optical transparency, thermal stability, mechanical strength, and oxygen barrier performance. The RC-PVOH films with 8% PVOH loading exhibited a peak degradation temperature of 362 °C, a tensile strength of 80.8 MPa ± 0.3 MPa, and an oxygen permeability of 2.40 cm3 x μm/m2 x 24 h x kPa. The RC-PVOH composite films could be a competitive alternative as a packaging material to replace petroleum-based plastics.

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

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1082 ◽  
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.

scholarly journals A Novel Way of Adhering PET onto Protein (Wheat Gluten) Plastics to Impart Water Resistance

Coatings ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 388 ◽  
Author(s):  
Oisik Das ◽  
Thomas Loho ◽  
Antonio Capezza ◽  
Ibrahim Lemrhari ◽  
Mikael Hedenqvist
Keyword(s):  
Coupling Agent ◽  
Water Resistance ◽  
Wheat Gluten ◽  
Barrier Properties ◽  
Compression Molding ◽  
Water Vapor Barrier ◽  
Plastic Materials ◽  
Strong Adhesion ◽  
Pet Film ◽  
Pet Films

This study presents an approach to protect wheat gluten (WG) plastic materials against water/moisture by adhering it with a polyethylene terephthalate (PET) film using a diamine (Jeffamine®) as a coupling agent and a compression molding operation. The laminations were applied using two different methods, one where the diamine was mixed with the WG powder and ground together before compression molding the mixture into plates with PET films on both sides. In the other method, the PET was pressed to an already compression molded WG, which had the diamine brushed on the surface of the material. Infrared spectroscopy and nanoindentation data indicated that the diamine did act as a coupling agent to create strong adhesion between the WG and the PET film. Both methods, as expected, yielded highly improved water vapor barrier properties compared to the neat WG. Additionally, these samples remained dimensionally intact. Some unintended side effects associated with the diamine can be alleviated through future optimization studies.

Barrier Properties Analysis of Polyethylene Terephthalate Films (PET) Coated with Natural Polyphenolic and Gelatin Mixture (PGM)

2018 ◽  
Vol 382 ◽  
pp. 38-43 ◽  
Author(s):  
Shagufta Ishtiaque ◽  
Shahina Naz ◽  
Jawaad Ahmed ◽  
Arshad Faruqui
Keyword(s):  
Polyethylene Terephthalate ◽  
Food Packaging ◽  
Oxygen Transfer Rate ◽  
Barrier Properties ◽  
Vapour Permeability ◽  
Barrier Materials ◽  
Oxygen Penetration ◽  
Green Tea Leaves ◽  
Film Formulation ◽  
Pet Films

The food packaging material provides protection against moisture, heat, enzymes, oxygen penetration etc. The shelf life of food can be increased by coating barrier materials on plastic films. In this work the oxygen transfer rate (OTR) and water vapour permeability (WVP) of Polyethylene terephthalate (PET) films were adjusted via coating of Polyphenols and Gelatin mixture (PGM) with different concentrations while maintaining the other properties of modified PET films. This article deals with the changes in properties of PGM coated PET films with some innovative ideas of multilayer film formulation. Polyphenolics were extracted from Terminalia Catappa (Indian almond), Camellia sinensis (Green tea leaves) and Trachyspermumammi (Ajwain). The results showed that WVP was decreased from 1.0±0 to 0.12±0.03 g/in2/day (p < 0.01) in comparison with uncoated (1.3±0.07g/in2/day). Similarly, same trend was obtained for OTR (63.5±0.02 to 38.1±0.03g/in2/day) with respect to uncoated film (82 ± 3.5). This study provides important evidence that addition of PGM on PET films leads to improved films in terms of OTR and WVP with minor changes in optical properties.

scholarly journals Impact of Backbone Amide Substitution at the Meta- and Para-Positions on the Gas Barrier Properties of Polyimide

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2097
Author(s):  
Qian Wen ◽  
Ao Tang ◽  
Chengliang Chen ◽  
Yiwu Liu ◽  
Chunguang Xiao ◽  
...  
Keyword(s):  
Transmission Rate ◽  
Barrier Properties ◽  
Polyimide Film ◽  
Flexible Display ◽  
Gas Barrier ◽  
Positron Annihilation Lifetime ◽  
Barrier Materials ◽  
Oxygen Transmission Rate ◽  
Display Technology ◽  
Gas Barrier Properties

This study designed and synthesised a meta-amide-substituted dianiline monomer (m-DABA) as a stereoisomer of DABA, a previously investigated para-amide-substituted dianiline monomer. This new monomer was polymerised with pyromellitic dianhydride (PMDA) to prepare a polyimide film (m-DABPI) in a process similar to that employed in a previous study. The relationship between the substitution positions on the monomer and the gas barrier properties of the polyimide film was investigated via molecular simulation, wide-angle X-ray diffraction (WXRD), and positron annihilation lifetime spectroscopy (PALS) to gain deeper insights into the gas barrier mechanism. The results showed that compared with the para-substituted DABPI, the m-DABPI exhibited better gas barrier properties, with a water vapour transmission rate (WVTR) and an oxygen transmission rate (OTR) as low as 2.8 g·m−2·d−1 and 3.3 cm3·m−2·d−1, respectively. This was because the meta-linked polyimide molecular chains were more tightly packed, leading to a smaller free volume and lower molecular chain mobility. These properties are not conducive to the permeation of small molecules into the film; thus, the gas barrier properties were improved. The findings have significant implications for the structural design of high-barrier materials and could promote the development of flexible display technology.

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