Engineering surface roughness of nanocellulose film via spraying to produce smooth substrates

Shanmugam, Kirubanandan; Nadeem, Humayun; Browne, Christine; Garnier, Gil; Batchelor, Warren

doi:10.1016/j.colsurfa.2019.124396

Cited by 21 publications

(13 citation statements)

References 24 publications

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“…Curtain coating is out of the picture [217], as nanocellulose suspensions with high solids content do not spontaneously flow by gravity. On the other hand, spray coating may be useful for applying the nanocellulose on the surface of paper [218], by which the dewatering and post-drying problems may be resolved.…”

Section: Technical Feasibility Of Surface Treatments With Nanocellulose and Cationic Starchmentioning

confidence: 99%

A review on cationic starch and nanocellulose as paper coating components

Sharma

Aguado

Murtinho

et al. 2020

International Journal of Biological Macromolecules

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Section: Technical Feasibility Of Surface Treatments With Nanocellulose and Cationic Starchmentioning

confidence: 99%

A review on cationic starch and nanocellulose as paper coating components

Sharma

Aguado

Murtinho

et al. 2020

International Journal of Biological Macromolecules

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“…27,41 Due to these effects, CMC has been shown to result in a decrease in surface roughness, or more simply a smoother surface. 42 CNCs are the crystalline sections of the fibers which remain after acid hydrolysis. Sulfate ions remain on the crystals leading to a highly charged surface, and due to their size and low aspect ratios, CNCs offer increased packing between the nanocellulose fibers.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Influence of Size and Chemical Additives on the Fabrication of Micropattern Nanocellulose Films

Browne

Lim

Sin

et al. 2021

ACS Sustainable Chem. Eng.

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Paper-based microfluidic devices are a rapidly emerging field, but applications are limited by the relatively large size of the features that can be currently manufactured. Here, we investigate reducing the feature size by spray-coating cellulose nanofibers (CNF) onto patterned molds, with a focus on optimizing the cellulose chemistry and size to optimize molding performance. We investigated the effects of (i) decreasing nanofiber size and increasing aspect ratio by homogenization, (ii) decreasing the suspension viscosity by partial substitution of carboxymethylcellulose (CMC), and (iii) partial substitution of cellulose nanofibers with cellulose nanocrystals (CNC) to reduce aspect ratio and improve packing. Only CNC addition substantially improved molding fidelity. Channel widths down to 5 μm could be made using a 50:50 mixture of CNF:CNC. This is by far the smallest channel width that has been achieved with any cellulose fiber-based microfluidics and opens the way to further miniaturization within these devices.

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“…To the best of our knowledge, no studies have been reported about the spraying deposition technique of NC-reinforced ECs on foods. Shanmugam and coworkers selected the spraying technique to deposit NC films by spraying on the surface of impermeable substrate, because they found that the spraying time was independent of NC suspension concentration [18]. However, to improve the smoothness of the obtained NC film, they preliminarily subjected the NC suspension to a high-pressure homogenization treatment to reduce fiber diameter and length.…”

Section: Spraying Methodsmentioning

confidence: 99%

“…The organoleptic properties of the coated products can also be improved if the coating is loaded with flavoring or coloring agents, as well as with sweeteners, spices, and seasonings [5,18,178], which are also reported to provide health benefits.…”

Section: Antimicrobial Properties and Shelf-life Extensionmentioning

confidence: 99%

The Use of Nanocellulose in Edible Coatings for the Preservation of Perishable Fruits and Vegetables

2021

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The usage of edible coatings (ECs) represents an emerging approach for extending the shelf life of highly perishable foods, such as fresh and fresh-cut fruits and vegetables. This review addresses, in particular, the use of reinforcing agents in film-forming solutions to tailor the physicochemical, mechanical and antimicrobial properties of composite coatings. In this scenario, this review summarizes the available data on the various forms of nanocellulose (NC) typically used in ECs, focusing on the impact of their origin and chemical or physical treatments on their structural properties (morphology and shape, dimension and crystallinity) and their functionality. Moreover, this review also describes the deposition techniques of composite ECs, with details on the food engineering principles in the application methods and formulation optimization. The critical analysis of the recent advances in NC-based ECs contributes to a better understanding of the impact of the incorporation of complex nanoparticles in polymeric matrices on the enhancement of coating properties, as well as on the increase of shelf life and the quality of fruits and vegetables.

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Engineering surface roughness of nanocellulose film via spraying to produce smooth substrates

Cited by 21 publications

References 24 publications

A review on cationic starch and nanocellulose as paper coating components

A review on cationic starch and nanocellulose as paper coating components

Influence of Size and Chemical Additives on the Fabrication of Micropattern Nanocellulose Films

The Use of Nanocellulose in Edible Coatings for the Preservation of Perishable Fruits and Vegetables

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