Barrier and mechanical properties of plasticized and cross-linked nanocellulose coatings for paper packaging applications

Herrera, Martha; Mathew, Aji P.; Oksman, Kristiina

doi:10.1007/s10570-017-1405-8

Cited by 99 publications

(52 citation statements)

References 32 publications

(63 reference statements)

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“…Optical and SEM images(Figures 4,5,8,9) of welded films suggested that surface texturing of welded films occurs, which may also affect their mechanical properties. Therefore, strength and barrier properties were measured.…”

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confidence: 99%

Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids

et al. 2018

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Cellulose nanofiber films (CNFF), were treated via a welding process using ionic liquids (ILs). Acid-base conjugated ILs derived from 1,5-diazabicyclo[4.3.0]non-5-ene [DBN] and 1-ethyl-3-methylimidazolium acetate ([emim][OAc]) were utilized. The removal efficiency of ILs from welded CNFF was assessed using liquid-state nuclear magnetic resonance (NMR) spectroscopy and Fourier transform infrared spectroscopy (FTIR). The mechanical and physical properties of CNFF indicated surface plasticization of CNFF, which improved transparency. Upon 2 treatment, the average CNFF toughness increased by 27 % and the films reached a Young modulus of ~5.8GPa. These first attempts for IL 'welding' show promise to tune bio-based films surfaces, expanding the scope of properties for the production of new bio-based materials in a green chemistry context. The results of this work are highly relevant to the fabrication of CNFFs using ionic liquids and related solvents. nanocomposites, transparent films, layer-by-layer films, paper products, cosmetics, barrier/separation membranes, transparent-flexible electronics, batteries, supercapacitors, catalytic supports, continuous fibers and textiles, food coatings, healthcare, antimicrobial films, biomedical and tissue engineering scaffolds, pH-responsive CNMs, drug delivery, among others 2. The sustainable preparation of cellulose-based nanomaterials is techno-economically challenging since this requires a low energy consumption process without the use, or production of, hazardous chemicals. The benefits are the production of high mechanical performance fibers and films, which 3 have potential applications as textiles, support for particles, and as composite materials for catalytic and electrochemical applications 3. Nanocellulose can form self-standing, thermallystable films and "nano-papers", thus this material has been strongly advocated as potential replacement for traditional packaging materials, primarily based on glass, aluminum, and fossilderived synthetic plastics 4-16 , but in many cases, such applications require an improvement of their physical and mechanical properties, in order to enhance their use 13,17. At this respect, the novel concept of welding has been introduced by Haverlhals 18-21. In this process, the surface of adjacent natural fibers (cotton, silk, and hemp) is plasticized and merged to create a congealed network using ILs such as 1-ethyl-3-methylimidazolium acetate ([emim][OAc]), a well-known cellulose-dissolving ionic liquid (IL). The welding process is intended mainly for cellulosic and protein-based fibers with the purpose to improve mechanical properties, synthesis of composites and functionalization of materials 18,22. The welding procedure has been used for modifying mainly cellulose macrofibers (not hydrolyzed neither treated fibers) to produce electrodes, catalysts, materials with special magnetic and electric features 23,24 , and synthesis of composites with improved mechanical properties 25. The same concept, using N-methylmorpholine-N-oxide (NMMO), was use...

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Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids

et al. 2018

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“…NC has a high aspect ratio (4-20 nm wide, 500-2000 nm in length) and also excellent film forming ability because of physical entanglement and hydrogen bonding between adjacent NC [1]. NC was reported to have prospective applications for bio-based materials to be used in food packaging, for instance, as reinforcement filler and plasticizer in edible films [2], as self-standing thin films for modified atmosphere packaging [3], or as a coating over paper packaging [4,5]. In particular, NC film has a good oxygen barrier property [6] which is important in food packaging considering prevention of lipid oxidation [7].…”

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confidence: 99%

Application of Nanofibrillated Cellulose on BOPP/LDPE Film as Oxygen Barrier and Antimicrobial Coating Based on Cold Plasma Treatment

Lü

Guo

et al. 2018

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The application of nanofibrillated cellulose (NC) films in packaging industry has been hindered by its lack of heat-sealing ability. Incorporation of NC films with the biaxially oriented polypropylene/low density polyethylene (BOPP/LDPE) laminates can take advantage of each material and endow the films with novel functions for food packaging applications. In this study, a coating that consists of NC and nisin was applied onto a cold plasma treated BOPP/LDPE film to fabricate a novel active packaging with an improved oxygen barrier performance and an added antimicrobial effect. The results showed that cold plasma treatment improved the surface hydrophilicity of BOPP/LDPE films for better attachment of the coatings. NC coatings significantly enhanced oxygen barrier property of the BOPP/LDPE film, with an oxygen transmission rate as low as 24.02 cc/m 2 •day as compared to that of the non-coated one (67.03 cc/m 2 •day). The addition of nisin in the coating at a concentration of 5 mg/g caused no significant change in barrier properties but imparted the film excellent antimicrobial properties, with a growth inhibition of L. monocytogenes by 94%. All films exhibit satisfying mechanical properties and transparency, and this new film has the potential to be used as antimicrobial and oxygen barrier packaging.

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“…Biomass-derived materials have attracted attention owing to their abundant resources, renewability, and biodegradability (Jonoobi et al 2014;Khalil et al 2012;Oksman et al 2003). Nanocellulose materials, including cellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs), that can be extracted from various types of biomass have attracted considerable interest owing to their specific physical and chemical properties (Geng et al 2018;Herrera et al 2017;Nissilä et al 2019). Recently, several studies on the preparation of highly porous nanocellulose-based aerogels using ice-templating have been reported, and some have shown interesting adsorption/absorption capabilities.…”

Section: Introductionmentioning

confidence: 99%

Lightweight, flexible, and multifunctional anisotropic nanocellulose-based aerogels for CO2 adsorption

et al. 2020

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CO 2 adsorption is a promising strategy to reduce costs and energy use for CO 2 separation. In this study, we developed CO 2 adsorbents based on lightweight and flexible cellulose nanofiber aerogels with monolithic structures prepared via freeze-casting, and cellulose acetate or acetylated cellulose nanocrystals (a-CNCs) were introduced into the aerogels as functional materials using an impregnation method to provide CO 2 affinity. The microstructure of the adsorbent was examined using scanning electron microscopy, and compression tests were performed to analyze the mechanical properties of the adsorbents. The CO 2 adsorption behavior was studied by recording the adsorption isotherms and performing column breakthrough experiments. The samples showed excellent mechanical performance and had a CO 2 adsorption capacity of up to 1.14 mmol/g at 101 kPa and 273 K. Compared to the adsorbent which contains cellulose acetate, the one impregnated with a-CNCs had better CO 2 adsorption capacity and axial mechanical properties owing to the building of a nanoscale scaffold on the surface of the adsorbent. Although the CO 2 adsorption capacity could be improved further, this paper reports a potential CO 2 adsorbent that uses all cellulose-based materials, which is beneficial for the environment from both resource and function perspectives. Moreover, the interesting impregnation process provides a new method to attach functional materials to aerogels, which have potential for use in many other applications.

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Barrier and mechanical properties of plasticized and cross-linked nanocellulose coatings for paper packaging applications

Cited by 99 publications

References 32 publications

Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids

Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids

Application of Nanofibrillated Cellulose on BOPP/LDPE Film as Oxygen Barrier and Antimicrobial Coating Based on Cold Plasma Treatment

Lightweight, flexible, and multifunctional anisotropic nanocellulose-based aerogels for CO2 adsorption

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