Nanopolysaccharides in Surface Coating

Oğuzlu, Hale; Jiang, Feng

doi:10.1007/978-981-15-0913-1_8

Cited by 4 publications

(3 citation statements)

References 176 publications

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“…Nanocellulose represents a green and sustainable family of nanomaterials that finds tremendous application potential in different areas such as nanocomposites, 1 biomedicine, 2 packaging, 3 and energy storage 4 . Although nanocellulose is derived from sustainable biomass, its sustainability depends on the production route.…”

Section: Introductionmentioning

confidence: 99%

Isolation of lignin‐containing cellulose nanocrystals: life‐cycle environmental impacts and opportunities for improvement

Zargar

Jiang

et al. 2021

Biofuels Bioprod Bioref

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Deep eutectic solvent (DES) has recently been attracting great interest for its role in isolating nanocellulose owing to its distinct advantages of biodegradability, low toxicity, and recyclability. Lignin‐containing cellulose nanocrystals (LCNCs) obtained using DES pretreatment has led to an improvement in the production of nanomaterials. Understanding the potential environmental impacts of this novel technology at the laboratory scale provides important insights to improve its sustainability at full scale in the future. This study evaluates the environmental impacts of the production of LCNCs from thermomechanical pulp (TMP) following acidic DES pretreatment (using a binary system of ‘choline chloride – oxalic acid dihydrate’ or a ternary system of ‘choline chloride – oxalic acid dihydrate – p‐toluenesulfonic acid’) based on various laboratory trials. The evaluation was conducted through a cradle‐to‐gate life‐cycle assessment for global warming potential (GWP), acidification potential (AP) and the cumulative energy demand (MJ). The average GWP, AP, and energy use were 39 kg CO2‐eq, 0.17 kg SO2‐eq, and 995 MJ per kg LCNCs, respectively. The sensitivity analysis showed that different degrees of reduction in environmental impact could be achieved by varying the input volume and/or reuse frequency of DES solutions. The largest reductions in GWP, AP, and energy use were achieved by reducing the input volume of DES solutions to 20% of its default value. The results of this LCA study illustrate the direction for future research and development (R&D) to further improve the sustainability of this DES‐mediated LCNC production technology. Through comparisons with the existing literature, this study also confirms the predominant contribution of chemical manufacturing to the overall environmental impacts of nanocellulose isolation technologies in general. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd

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Section: Introductionmentioning

confidence: 99%

Isolation of lignin‐containing cellulose nanocrystals: life‐cycle environmental impacts and opportunities for improvement

Zargar

Jiang

et al. 2021

Biofuels Bioprod Bioref

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“…Spray coating is a common technique to deposit coating solution or suspension onto substrate on both laboratory and industrial scales. In the spray coating process, coating fluid is atomized to droplets, then transferred towards the substrate, following by coating formation due to the droplet deposition onto the surface (Oguzlu & Jiang, 2019). The surface morphology and thickness of coating layer are determined by a numbers of process parameters (e.g., nozzle configuration, pressure of carrier gas, working distance, and form of the spray jet) and the properties of coating solution and suspension (e.g., viscosity, particle size, and volatility of solvent), and nanoscale coating thickness can be obtained by spray coating (Oguzlu & Jiang, 2019; Pawlowski, 2009).…”

Section: Antimicrobial‐coated Films: Coating Methodsmentioning

confidence: 99%

Antimicrobial‐coated films as food packaging: A review

Dudley

2021

Comp Rev Food Sci Food Safe

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Antimicrobial food packaging involves packaging the foods with antimicrobials to protect them from harmful microorganisms. In general, antimicrobials can be integrated with packaging materials via direct incorporation of antimicrobial agents into polymers or application of antimicrobial coating onto polymer surfaces. The former option is generally achieved through thermal film‐making technology such as compression molding or film extrusion, which is primarily suitable for heat‐stable antimicrobials. As a nonthermal technology, surface coating is more promising compared to molding or extrusion for manufacturing food packaging containing heat‐sensitive antimicrobials. In addition, it also has advantages over direct incorporation to preserve the packaging materials’ bulk properties (e.g., mechanical and physical properties) and minimize the amount of antimicrobials to reach sufficient efficacy. Herein, antimicrobial food packaging films achieved through surface coating is explored and discussed. The two components (i.e., film substrate and antimicrobials) consisting of the antimicrobial‐coated films are reviewed as plastic/biopolymer films; and synthetic/naturally occurring antimicrobials. Furthermore, special emphasis is given to different coating technologies to deposit antimicrobials onto film substrate. Laboratory coating techniques (e.g., knife coating, bar coating, and spray coating) commonly applied in academic research are introduced briefly, and scalable coating methods (i.e., electrospinning/spraying, gravure roll coating, flexography coating) that have the potential to bring laboratory‐developed antimicrobial‐coated films to an industrial level are explained in detail. The migration profile, advantages/drawbacks of antimicrobial‐coated films for food applications, and quantitative analyses of the reviewed antimicrobial‐coated films from different aspects are also covered in this review. A conclusion is made with a discussion of the challenges that remain in bringing the production of antimicrobial‐coated films to an industrial level.

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“…Indeed, spin coating is a technique used to deposit coating materials on a flat substrate through centrifugal force: the coating material is applied onto the center of a substrate and then distributed evenly on the substrate through spinning at a high velocity. While spin coating is generally a laboratory technique that can only be used for small-sized substrates, spray coating is a technique generally used to deposit the coating solution or suspension onto the substrate on both an industrial and laboratory scale [17]. In this process, the liquid mixture used for the coating is atomized into droplets, then transferred to the substrate, with the formation of the coating obtained after the deposition of the droplets and subsequent evaporation of the solvent on the surface.…”

Section: Introductionmentioning

confidence: 99%

Natural Dyes Used as Organic Coatings UV Protecting for Food Packages

et al. 2022

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Nowadays, the use of biodegradable and bio-derived plastics such as poly(lactic acid) (PLA) and cellulose in food packaging applications are replacing the use of different and more conventional oil-derived polymers that are much more expensive and unsuitable for the environment. However, their high transparency to ultraviolet (UV) radiation limits their current commercialization. Therefore, this study focuses on the deposition of organic thin films on commercial PLA and cellulose in order to enhance their performance, in particular for UV shielding. Coatings with different natural and biocompatible (edible) molecules, quinine and p-Coumaric acid, dispersed in different matrices are deposited by comparing different deposition techniques such as spray coating and spin coating. Morphological characterizations are carried out with atomic force microscopy (AFM) and scanning electron microscopy (SEM), with spectroscopic characterizations performed by light transmission measurements. Our results show that it is possible to enhance the UV protection of packaging using a suitable deposition with these biocompatible materials.

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Nanopolysaccharides in Surface Coating

Cited by 4 publications

References 176 publications

Isolation of lignin‐containing cellulose nanocrystals: life‐cycle environmental impacts and opportunities for improvement

Isolation of lignin‐containing cellulose nanocrystals: life‐cycle environmental impacts and opportunities for improvement

Antimicrobial‐coated films as food packaging: A review

Natural Dyes Used as Organic Coatings UV Protecting for Food Packages

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