Film formation and barrier performance of latex based coating: Impact of drying temperature in a flexographic process

Mesic, Beko; Cairns, Mathew J.; Järnström, Lars; Guen, Marie-Joo Le; Parr, Robin

doi:10.1016/j.porgcoat.2018.12.025

Cited by 20 publications

(14 citation statements)

References 24 publications

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“…It should be noted that although the effect of the moisture content in the paperboard substrate is not investigated here, it may also affect this equilibrium. As reported by Mesic et al [15] the water migration through the porous substrate influences the film formation properties and it may as well, in our case influence the remaining moisture content of the coating.…”

Section: Water Barrier Properties Of the Resin-stabilized Waterborne ...supporting

confidence: 77%

“…Paper(board) is a bio-based, versatile, and inexpensive The challenge for a waterborne coating with good water barrier properties is to make the transition from polymer particles dispersed in water to a defect-free polymer coating that repels water. [15,25] In the current work, we shed light on how the water barrier performance relates to the characteristics of an ASRstabilized waterborne coating, applied on a paperboard substrate. ASRs are acid-rich polymeric resins often used in the waterborne coatings industry.…”

Section: Introductionmentioning

confidence: 99%

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Water Barrier Properties of Resin‐Stabilized Waterborne Coatings for Paperboard

Bakker

Aarts

Esteves

et al. 2022

Macro Materials & Eng

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The replacement of plastic packaging by paperboard can significantly contribute to meeting sustainability goals in important application fields, such as in food packaging. The (water) barrier properties of paperboard‐based products need, however, to be improved. Waterborne coatings offer an environmentally friendly possibility to enhance these barrier properties, which in turn highly depend on the coating chemistry and film formation. Here, the relation between the characteristics of a waterborne coating and its water barrier performance is investigated. A waterborne polymer dispersion is prepared by emulsion polymerization, using an alkali‐soluble resin (ASR) as stabilizing agent. The ASR‐stabilized dispersion is applied as a coating on paperboard. During this application, the carboxylate groups of the ASR are converted to uncharged carboxylic acids. The coatings are characterized by Fourier‐transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), and scanning electron microscopy (SEM), and the water barrier properties are evaluated by dynamic vapor sorption (DVS) and the Cobb method. It is found that the water barrier performance is dominated by the carboxylate concentration remaining in the film, which is dependent on the moisture content. High drying temperatures improve particle deformation and polymer flow during coating formation, but do not influence the water barrier performance.

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Section: Water Barrier Properties Of the Resin-stabilized Waterborne ...supporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Water Barrier Properties of Resin‐Stabilized Waterborne Coatings for Paperboard

Bakker

Aarts

Esteves

et al. 2022

Macro Materials & Eng

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“…This is not to say that latex based immobilisation is without issues-film formation and therefore subsequent efficacy of the biocomposites can be affected due to the coating formulation, glass transition temperature (Tg), particle size and distribution, particle morphology, drying and humidity, substrate choice, and biomass loading [80,[86][87][88][89]. The drying temperature can have significant effects on latex coalescence on porous substrates, where rapid absorption of the aqueous phase into the substrate may result in cracking of the latex [90]. There is also concern regarding gas and liquid mass transfer to immobilised microbes which may limit cellular productivity.…”

Section: Bioinspiration From Lichenmentioning

confidence: 99%

Immobilising Microalgae and Cyanobacteria as Biocomposites: New Opportunities to Intensify Algae Biotechnology and Bioprocessing

et al. 2021

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There is a groundswell of interest in applying phototrophic microorganisms, specifically microalgae and cyanobacteria, for biotechnology and ecosystem service applications. However, there are inherent challenges associated with conventional routes to their deployment (using ponds, raceways and photobioreactors) which are synonymous with suspension cultivation techniques. Cultivation as biofilms partly ameliorates these issues; however, based on the principles of process intensification, by taking a step beyond biofilms and exploiting nature inspired artificial cell immobilisation, new opportunities become available, particularly for applications requiring extensive deployment periods (e.g., carbon capture and wastewater bioremediation). We explore the rationale for, and approaches to immobilised cultivation, in particular the application of latex-based polymer immobilisation as living biocomposites. We discuss how biocomposites can be optimised at the design stage based on mass transfer limitations. Finally, we predict that biocomposites will have a defining role in realising the deployment of metabolically engineered organisms for real world applications that may tip the balance of risk towards their environmental deployment.

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“…Although surface roughness and porosity can increase the wettability of a surface, they have a significant influence on the coating morphology and thickness uniformity [158,159]. Other aspects that influence the coating are the process parameters, such as the deposition rate [160], the drying temperature [161] and the use of air or vacuum drying [162,163].…”

Section: Liquid Bio-based Coatingsmentioning

confidence: 99%

Liquid and Solid Functional Bio-Based Coatings

et al. 2021

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The development of new bio-based coating materials to be applied on cellulosic and plastic based substrates, with improved performances compared to currently available products and at the same time with improved sustainable end of life options, is a challenge of our times. Enabling cellulose or bioplastics with proper functional coatings, based on biopolymer and functional materials deriving from agro-food waste streams, will improve their performance, allowing them to effectively replace fossil products in the personal care, tableware and food packaging sectors. To achieve these challenging objectives some molecules can be used in wet or solid coating formulations, e.g., cutin as a hydrophobic water- and grease-repellent coating, polysaccharides such as chitosan-chitin as an antimicrobial coating, and proteins as a gas barrier. This review collects the available knowledge on functional coatings with a focus on the raw materials used and methods of dispersion/application. It considers, in addition, the correlation with the desired final properties of the applied coatings, thus discussing their potential.

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Film formation and barrier performance of latex based coating: Impact of drying temperature in a flexographic process

Cited by 20 publications

References 24 publications

Water Barrier Properties of Resin‐Stabilized Waterborne Coatings for Paperboard

Water Barrier Properties of Resin‐Stabilized Waterborne Coatings for Paperboard

Immobilising Microalgae and Cyanobacteria as Biocomposites: New Opportunities to Intensify Algae Biotechnology and Bioprocessing

Liquid and Solid Functional Bio-Based Coatings

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