Mechanically strong, flexible and thermally stable graphene oxide/nanocellulosic films with enhanced dielectric properties

Beeran, P T Yasir; Bobnar, V.; Gorgieva, Selestina; Grohens, Yves; Finšgar, Matjaž; Thomas, Sabu; Kokol, Vanja

doi:10.1039/c6ra06744a

Cited by 63 publications

(11 citation statements)

References 42 publications

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“…Also their surfaces are smoother, which can be important, e.g., for high definition of linewidths in printed devices. Nanopapers can be furnished also by a wealth of other functional properties, like barrier properties to reduce vapour permeation, fire‐retardancy, magnetic properties, and electrical conductivity . Among the potential applications, we foresee that nanopaper device substrates for flexible transparent devices are particularly promising.…”

Section: Functional Materials Based On Nanocellulosesmentioning

confidence: 99%

Advanced Materials through Assembly of Nanocelluloses

et al. 2018

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There is an emerging quest for lightweight materials with excellent mechanical properties and economic production, while still being sustainable and functionalizable. They could form the basis of the future bioeconomy for energy and material efficiency. Cellulose has long been recognized as an abundant polymer. Modified celluloses were, in fact, among the first polymers used in technical applications; however, they were later replaced by petroleum-based synthetic polymers. Currently, there is a resurgence of interest to utilize renewable resources, where cellulose is foreseen to make again a major impact, this time in the development of advanced materials. This is because of its availability and properties, as well as economic and sustainable production. Among cellulose-based structures, cellulose nanofibrils and nanocrystals display nanoscale lateral dimensions and lengths ranging from nanometers to micrometers. Their excellent mechanical properties are, in part, due to their crystalline assembly via hydrogen bonds. Owing to their abundant surface hydroxyl groups, they can be easily modified with nanoparticles, (bio)polymers, inorganics, or nanocarbons to form functional fibers, films, bulk matter, and porous aerogels and foams. Here, some of the recent progress in the development of advanced materials within this rapidly growing field is reviewed.

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Section: Functional Materials Based On Nanocellulosesmentioning

confidence: 99%

Advanced Materials through Assembly of Nanocelluloses

et al. 2018

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“…A small difference in the mean CA values between both surfaces can be observed in the case of MFC-ATH-30p lm, given ∼72° on the upper-side and ∼66° on the lower-side. This might be due to a difference in the lm surface roughness and smoothness of the formed MFC-ATHp microdomains, as be seen from the SEM images, where a rougher surface gives higher CA than smoother ones due to the heterogeneous wetting being related to the formation of air compartments between the droplets and the surface (Beeran et al 2016).…”

Section: Surface Morphological and Physico-chemical Properties Of Thementioning

confidence: 99%

“…This is also related to its signi cant physical and chemical properties, above all, high crystallinity, low density, extraordinary mechanical properties and nanoscale dimension, that gives high surface area and huge amounts of hydroxyl groups available for hydrogen bonding or speci c chemical modi cation (Dufresne 2013;Klemm et al 2018). Its application expands from the production of packaging, paper and board, to exible lms, acting as thermal insulators, as well as a functional material for forthcoming cutting-edge applications in electronics (Abitbol et al 2016), energy storage (Kim et al 2019;Beeran et al 2016), electromagnetic interference shielding (Gopakumar et al 2018;Zeng et al 2020), solar cells (Du et al 2017), photo/catalysis (Kaushik and Moores 2016) etc. where it acts mainly as a template or carrier for functional in/organic nanoparticles like carbon nanotubes (Miyashiro et al 2020), graphene oxide (Beeran et al 2016;Wicklein et al 2014), metal nanoparticles (Oun et al 2020;Kaushik and Moores 2016), thus giving the products high added-value properties by acting synergistically.…”

Section: Introductionmentioning

confidence: 99%

Addition of Al(OH)3 vs. AlO(OH) nanoparticles on the optical, thermo-mechanical and heat/oxygen transmission properties of microfibrillated cellulose films

Kolar

Mušič²,

Korošec

et al. 2021

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Differently structured aluminum (tri/mono) hydroxide (Al(OH)3 / AlO(OH)) nanoparticles were prepared and used as thermal-management additives to microfibrillated cellulose (MFC), cast-dried in thin-layer films. Both particles increased the thermal stability of the MFC film, yielding 20–23% residue at 600 °C, and up to 57% lowered enthalpy (to 5.5–7.5 kJ/g) at 0.15 wt% of loading, while transforming to Al2O3. However, the film containing 40 nm large Al(OH)3 particles decomposed in a one-step process, and released up to 20 % more energy between 300–400°C as compared to the films prepared from smaller (21 nm) and meta-stable AlO(OH), which decomposed gradually with an exothermic peak shifted to 480 °C. The latter resulted in a highly flexible, optically transparent (95%), and mechanically stronger (5.7 GPa) film with a much lower specific heat capacity (0.31 − 0.28 J/gK compared to 0.68–0.89 J/gK for MFC-Al(OH)3 and 0.87–1.26 for MFC films), which render it as an effective heat-dissipating material to be used in flexible opto-electronics. Low oxygen permeability (2192.8 cm3/m2day) and a hydrophobic surface (>60°) rendered such a film also useful in ecologically-benign and thermosensitive packaging.

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“…Conductive materials predominantly contain metal particles, carbon materials, and conductive polymers. Nanocellulose can be combined with these conductive materials to fabricate conductive composites with high mechanical strength, stiffness, foldability and flexibility (Pottathara et al, 2016). The fabrication of nanocellulose-based conductive composite has been achieved mostly by surface grafting and blending of conductive species and nanocellulose (Ko et al, 2017).…”

Section: Nanocellulose Derived Conductive Materialsmentioning

confidence: 99%

Current State of Applications of Nanocellulose in Flexible Energy and Electronic Devices

et al. 2020

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Novel and unique applications of nanocellulose are largely driven by the functional attributes governed by its structural and physicochemical features including excellent mechanical properties and biocompatibility. In recent years, thousands of groundbreaking works have helped in the development of targeted functional nanocellulose for conductive, optical, luminescent materials, and other applications. The growing demand for sustainable and renewable materials has led to the rapid development of greener methods for the design and fabrication of high-performance green nanomaterials with multiple features, and consequently new challenges and opportunities. The present review article discusses historical developments, various fabrication and functionalization methods, the current stage, and the prospects of flexible energy and hybrid electronics based on nanocellulose.

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Mechanically strong, flexible and thermally stable graphene oxide/nanocellulosic films with enhanced dielectric properties

Abstract: Mechanically strong and flexible films with dielectric properties and energy storage ability have been fabricated from ammonia-functionalized graphene oxide (NGO) nanoplatelets and cellulose nanofibrils (CNFs) vs. TEMPO pre-oxidized CNFs (TCNFs).

Cited by 63 publications

References 42 publications

Advanced Materials through Assembly of Nanocelluloses

Advanced Materials through Assembly of Nanocelluloses

Addition of Al(OH)3 vs. AlO(OH) nanoparticles on the optical, thermo-mechanical and heat/oxygen transmission properties of microfibrillated cellulose films

Current State of Applications of Nanocellulose in Flexible Energy and Electronic Devices

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