A method for preparing epoxy-cellulose nanofiber composites with an oriented structure

Nissilä, Tuukka; Hietala, Maiju; Oksman, Kristiina

doi:10.1016/j.compositesa.2019.105515

Cited by 42 publications

(33 citation statements)

References 26 publications

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“…Lignocellulosic materials have found many applications as reactive filler in various polymers, including thermoplastics, such as polyethylene [ 3 , 4 ], poly (lactic acid) [ 5 , 6 , 7 ], poly (methyl methacrylate) [ 8 , 9 ], polyurethane [ 10 , 11 , 12 ] etc.) and thermosetting matrices, such as phenolic [ 13 , 14 ] and epoxy resins [ 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cellulose Nanocrystals and Lignin Nanoparticles on Mechanical, Antioxidant and Water Vapour Barrier Properties of Glutaraldehyde Crosslinked PVA Films

et al. 2020

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In this work, PVA nanocomposite films containing cellulose nanocrystals (CNC) and different amounts of lignin nanoparticles (LNP), prepared via a facile solvent cast method, were crosslinked by adding glutaraldehyde (GD). The primary objective was to investigate the effects of crosslinker and bio-based nanofillers loading on thermal, mechanical, antioxidant and water barrier behaviour of PVA nanocomposite films for active food packaging. Thermogravimetric analysis showed improved thermal stability, due to the strong interactions between LNP, CNC and PVA in the presence of GD, while Wide-angle X-ray diffraction results confirmed a negative effect on crystallinity, due to enhanced crosslinking interactions between the nanofillers and PVA matrix. Meanwhile, the tensile strength of PVA-2CNC-1LNP increased from 26 for neat PVA to 35.4 MPa, without sacrificing the ductility, which could be explained by a sacrificial hydrogen bond reinforcing mechanism induced by spherical-like LNP. UV irradiation shielding effect was detected for LNP containing PVA films, also migrating ingredients from PVA nanocomposite films induced radical scavenging activity (RSA) in the produced films in presence of LNP. Furthermore, PVA-CNC-LNP films crosslinked by GD showed marked barrier ability to water vapour.

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Section: Introductionmentioning

confidence: 99%

Effect of Cellulose Nanocrystals and Lignin Nanoparticles on Mechanical, Antioxidant and Water Vapour Barrier Properties of Glutaraldehyde Crosslinked PVA Films

et al. 2020

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“…In particular, these composites are being considered for ballistic armors [ 27 , 28 , 29 , 30 ]. More recently, several researchers have been investigating the NLF waste as a source of nanocrystalline cellulose (NCC) [ 31 , 32 , 33 , 34 , 35 , 36 ], a strong nanomaterial, which can be used to produce several important products, such as nanocomposites, ion exchange membranes, films for electronics devices, and others [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber

et al. 2020

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Composites reinforced with natural lignocellulosic fibers (NLFs) are gaining relevance as the worldwide demand for renewable and sustainable materials increases. To develop novel natural composites with satisfactory properties, less common NLFs should also be investigated. Among these, the Cyperus malaccensis (CM), a type of sedge fiber, is already used in simple items like ropes, furniture, and paper, but has not yet been investigated as composite reinforcement for possible engineering applications. Therefore, the present work evaluated for the first time the properties of novel epoxy composites incorporated with 10, 20, and 30 vol.% of CM sedge fibers. Tensile, Izod-impact, and ballistic impact tests were performed, as well as Fourier transform infrared (FT-IR) spectroscopy and thermal analysis of the composites. Results disclosed a decrease (−55%) in tensile strengths as compared to the neat epoxy. However, the elastic modulus of the 30 vol.% sedge fiber composite increased (+127%). The total strain and absorbed ballistic energy did not show significant variation. The Izod impact energy of the 30 vol.% composite was found to be 181% higher than the values obtained for the neat epoxy as a control sample. An increase in both stiffness and toughness characterized a reinforcement effect of the sedge fiber. The thermal analysis revealed a slight decrease (−15%) in the degradation temperature of the CM sedge fiber composites compared to the neat epoxy. The glass-transition temperatures were determined to be in the range of 67 to 81 °C.

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“…With the addition of the functionalised nanocellulose as the reinforcing material, the mechanical properties of epoxy-based cellulose nanocomposites have been enhanced significantly [ 90 , 91 ]. An approach has been conducted to prepare epoxy-cellulose nanofibre composites with an oriented structure [ 92 ]. The process combined the ice-templating (or freeze-casting) method in order to prepare highly porous nanocellulose networks before being used as preforms for impregnation with a bioepoxy resin.…”

Section: Applicationsmentioning

confidence: 99%

Application of Nanotechnology in Wood-Based Products Industry: A Review

et al. 2020

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Wood-based industry is one of the main drivers of economic growth in Malaysia. Forest being the source of various lignocellulosic materials has many untapped potentials that could be exploited to produce sustainable and biodegradable nanosized material that possesses very interesting features for use in wood-based industry itself or across many different application fields. Wood-based products sector could also utilise various readily available nanomaterials to enhance the performance of existing products or to create new value added products from the forest. This review highlights recent developments in nanotechnology application in the wood-based products industry.

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A method for preparing epoxy-cellulose nanofiber composites with an oriented structure

Cited by 42 publications

References 26 publications

Effect of Cellulose Nanocrystals and Lignin Nanoparticles on Mechanical, Antioxidant and Water Vapour Barrier Properties of Glutaraldehyde Crosslinked PVA Films

Effect of Cellulose Nanocrystals and Lignin Nanoparticles on Mechanical, Antioxidant and Water Vapour Barrier Properties of Glutaraldehyde Crosslinked PVA Films

Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber

Application of Nanotechnology in Wood-Based Products Industry: A Review

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