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

Xiaowei, Meng; Qi, Peng; Sun, Jun; Li, Hongfei; Zhang, Sheng; Liu, Xiaodong; Gu, Xiaoyu

doi:10.1016/j.porgcoat.2020.105788

Cited by 24 publications

(21 citation statements)

References 37 publications

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“…• C and 50 % RH, and afterward also at23,25,30,35, and 40 • C and 0 % RH. If the respective transmission rate was constant for at least 10 h, the measurement was stopped assuming that the steady state was established.…”

mentioning

confidence: 87%

“…For mixtures of PVA with increasing ratios of kaolin (phyllosilicate like MMT with a slightly different structure), Nyflätt et al ( 12 ) did not observe any improvement on the barrier properties of the coatings on PET at a thickness of 1.8 μm. Meng et al ( 25 ) did not find a barrier improvement due to MMT integration for one-time dip-coated PET films. The films have been dipped in PVA and a nanocomposite lacquer of PVA and MMT at a mixing ratio of 1:2.…”

Section: Introductionmentioning

confidence: 96%

at 23°C and 0 % RH. Grunlan et al ( 14 ) mixed PVA with vinyl acetate and iactonic acid to get a terpolymer with an intrinsically high oxygen permeability coefficient of 0.5

at 23°C and 55 % RH.…”

Section: Introductionmentioning

confidence: 99%

“…In these studies using commercially available clay particles and PVA, some further investigations were still required; for example, Meng et al (25) mixed MMT with laponite and PVA in equal parts and increased the number of layers to five, leading to a total dry coating layer thickness of 4.0 µm and an oxygen permeability coefficient of 0.01 Although the barrier improvement of PVA coatings with silicate nanoparticles has been proven and very high oxygen barrier performance has already been reported in the literature, the usage of PVA silicate nanocomposites in the packaging industry is still rare. The reasons for this are manifold: either the synthesis of silicate particles is extensive, the number of coating layers is high, the curing time is not adjusted to industrial scale, the substrate material is not the material of interest for the food packaging industry, the barrier properties can only be achieved at low humidity, or there are currently no available green and effective exfoliation methods for the particles.…”

Section: Introductionmentioning

confidence: 99%

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Nanocomposite Coatings Based on Polyvinyl Alcohol and Montmorillonite for High-Barrier Food Packaging

et al. 2022

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Materials with high barrier properties against oxygen are required for the packaging of many sensitive foods. Since commodity polymers lack these properties, additional barrier materials are used in plastic-based barrier packaging. These are usually more expensive than commodity polymers and, in higher fractions, also make recycling more difficult. Current developments, therefore, aim at barrier layers that are as thin as possible but retain the barrier properties. One approach is to incorporate nanoparticles into these layers. In this study, the barrier properties of nanocomposite coatings, consisting of unmodified polyvinyl alcohol (PVA), and dispersed stick-shaped halloysite (Hal) or platelet-shaped montmorillonite (MMT) silicate nanoparticles, were investigated. The PVA was dissolved in aqueous nanoparticle dispersions, which were prepared by mechanical shearing, to produce the so-called “nanolacquer.” Nanolacquers with nanoparticle concentrations of 7, 30, and 47 vol% with respect to PVA were applied in a single process step with k-bar on a polypropylene substrate film. The integration of 30 vol% platelet-shaped MMT enhances the barrier performance in comparison to pure PVA by a factor of 12 and 17 for oxygen and helium, respectively. Scanning electron microscopy (SEM) shows a homogeneous distribution and a parallel alignment of the nanoparticles within the coated layer. An increase in the crystallinity of PVA was observed due to the nanoparticle integration as demonstrated by x-ray diffraction (XRD) measurements. The investigation by Fourier transform infrared (FTIR) spectroscopy and the activation energy of the permeation coefficient indicate an interaction between the nanoparticles and the PVA. The theoretically calculated values for barrier enhancement accord well with the experimental values, which emphasizes that the gas barrier improvement for oxygen and helium is mainly dominated by the tortuous path effect.

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mentioning

confidence: 87%

Section: Introductionmentioning

confidence: 96%

at 23°C and 0 % RH. Grunlan et al ( 14 ) mixed PVA with vinyl acetate and iactonic acid to get a terpolymer with an intrinsically high oxygen permeability coefficient of 0.5

at 23°C and 55 % RH.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nanocomposite Coatings Based on Polyvinyl Alcohol and Montmorillonite for High-Barrier Food Packaging

et al. 2022

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“…PET can also be modified by blending or by the addition of oxygen scavengers or coated to improve its barrier properties (. [7][8][9][10][11][12][13][14][15][16] Oxygen barrier as such low as~0.2 cc/cm m À2 atm À1 day À1 can be achieved on PET bottle. However, PET requires accurate drying before being processed and processing temperature very high that seldom is lower than 250 C in injection molding of preforms.…”

Section: Introductionmentioning

confidence: 99%

Injection‐stretch blow molding of poly (lactic acid)/polybutylene succinate blends for the manufacturing of bottles

Aversa

Barletta

Gisario

et al. 2021

J of Applied Polymer Sci

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The stretch blow molding process of plastic preforms is widely used for the manufacturing of bottles in numerous market sectors, with high production volumes and low unit costs. In the sector of alcoholic beverages and, in particular, of wine, plastic bottles are used sporadically. Glass bottles or other economic solutions such as laminated cardboard containers or so-called bagin-boxes are regularly preferred. However, the high ease of use, lightness, recyclability and low cost of plastic materials are the main reasons that are fueling interest especially in wine producers. Poly (ethylene terephthalate) bottles have recently been introduced to the market, although their success has been limited by poor gas impermeability and above all by their recognized high environmental footprint. Barrier can be improved by oxygen scavenger and plasma coating. Environmental footprint is rather low when recycled but that is not well possible with scavenger. Bioplastic materials offer an interesting alternative to fossil-based plastics, combining most of their technical advantages with a lower environmental impact. However, they are more expensive and complex to process. In addition, mechanical and barrier properties are often less than for conventional polymers. In this work, therefore, the development of bioplastic bottles with low gas permeation by stretch blow molding was studied. Poly (lactic acid)-polybutylene succinate blends have been modified by adding additives that obstruct the passage of gaseous molecules through the wall of the bottle. The studies have in particular concerned the extrusion and characterization of bioplastic compounds, the injection molding of preforms, and the blowing of bottles. The results obtained showed that it is possible to obtain low permeation bioplastic bottles, which are an ecological alternative to conventional solutions for packaging.

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Polymer Nanocomposites as Engineered Food Packaging Materials

Yılmaz

2022

Nanotechnology in Intelligent Food Packaging

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

Cited by 24 publications

References 37 publications

Nanocomposite Coatings Based on Polyvinyl Alcohol and Montmorillonite for High-Barrier Food Packaging

Nanocomposite Coatings Based on Polyvinyl Alcohol and Montmorillonite for High-Barrier Food Packaging

Injection‐stretch blow molding of poly (lactic acid)/polybutylene succinate blends for the manufacturing of bottles

Polymer Nanocomposites as Engineered Food Packaging Materials

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