Cellulose polymer composites (WPC)

Bayer, John; Granda, L.A.; Méndez, José Alberto; Pèlach, M. Àngels; Vilaseca, Fabiola; Mutjé, Pere

doi:10.1016/b978-0-08-100411-1.00005-4

Cited by 16 publications

(7 citation statements)

References 29 publications

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“…Cellulose and its composites have been the subject of several glycoscience studies recently, in both experimental and theoretical investigations (Bu, Himmel, & Crowley, 2015;Fuentes et al, 2015;Hirn & Schennach, 2015;Van Vuure, Baets, Wouters, & Hendrickx, 2015). Interesting properties of cellulose have motivated research and stimulated industry to exploit this material as such or in combination with other polymers (Azizi Samir, Alloin, & Dufresne, 2005;Bayer et al, 2016;Klemm, Heublein, Fink, & Bohn, 2005;Klemm et al, 2011;Siró & Plackett, 2010). Nevertheless, because of difficulties with characterization methods, little has been achieved in recognizing an effective constituent in the plant cell wall, which inherently affects the properties of natural fibres as a whole: dislocated cellulose.…”

Section: Introductionmentioning

confidence: 99%

Tensile behaviour of dislocated/crystalline cellulose fibrils at the nano scale

Khodayari

Vuure

Hirn

et al. 2020

Carbohydrate Polymers

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Atomistic modelling of cellulose has widely been investigated over a period of many years using molecular dynamics simulation methods. In this paper, we model Iβ crystalline cellulose as well as develop a model including dislocations in between the crystal regions. The model including dislocations shows a tensile modulus of 109 GPa, 25% lower than that of the fully crystalline model (146 GPa). The change in the dihedral angle preferences is analysed, and the effect this has on the hydrogen bonding pattern is assessed. How the presence of hydrogen bonds can contribute to elastic properties of cellulose nano-fibrils is shown. The effect of water on the elastic modulus of the fibrils is also investigated. Moreover, an illustration is given of how the tensile behaviour of fibrils is controlled by a synergy between the geometry changes occurring at the glycosidic linkage, reflected by specific torsional and glycosidic angles. These findings can be useful in further modelling of cellulosic fibrils at the atomistic and coarse-grained scales.

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Section: Introductionmentioning

confidence: 99%

Tensile behaviour of dislocated/crystalline cellulose fibrils at the nano scale

Khodayari

Vuure

Hirn

et al. 2020

Carbohydrate Polymers

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“…The use of natural fillers/reinforcements into polymeric matrices could lead to multiple advantages, such as clear cost reduction, lightness and good balance on mechanical properties, and a marked low environmental impact as well, due to the use of renewable materials [3]. For these reasons some technological sectors such as aerospace, automotive, building among others and other sectors, such as packaging, have shown a clear interest on these materials [4,5,6]. Despite this, natural fillers/reinforcements are majorly lignocellulosic materials and, therefore, they show an extremely high hydrophilicity.…”

Section: Introductionmentioning

confidence: 99%

Bio-Polyethylene-Based Composites Reinforced with Alkali and Palmitoyl Chloride-Treated Coffee Silverskin

et al. 2019

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This work investigates the feasibility of using coffee silverskin (CSS) as a reinforcing agent in biobased polyethylene (BioPE) composites, by adding it in bulk and thin film samples. The effect of two different treatments, alkali bleaching (CSS_A) and esterification with palmitoyl chloride (CSS_P), on mechanical, thermal, morphological and water absorption behavior of produced materials at different CSS loading (10, 20 and 30 wt %) was investigated. A reactive graft copolymerization of BioPE with maleic anhydride was considered in the case of alkali treated CSS. It was found that, when introduced in bulk samples, improvement in the elastic modulus and a reduction in strain at maximum stress were observed with the increase in CSS fraction for the untreated and treated CSS composites, while the low aspect ratio of the CSS particles and their poor adhesion with the polymeric matrix were responsible for reduced ductility in films, decreasing crystallinity values and reduction of elastic moduli. When CSS_A and CSS_P are introduced in the matrix, a substantial reduction in the water uptake is also obtained in films, mainly due to presence of maleated PE, that builds up some interactions to eliminate the amounts of OH groups and hydrophobized CSS, due to the weakened absorption capacity of the functionalized CSS.

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“…It is also applied as a wrapping foil for packaging and for garbage bags. 7 Despite the high-energy content of plastics, 15 to 40 wt% of plastics waste is deposed into water bodies 8 and remarkable part (21-42 wt%) is placed in landfills. 9 Biomass (BM) and plastic wastes should be potential energy resources because they can be successfully and sustainably converted to (bio) fuel.…”

Section: Introductionmentioning

confidence: 99%

“…LDPE is widely used as protective films on textiles or on papers such as juice cartons. It is also applied as a wrapping foil for packaging and for garbage bags 7 . Despite the high‐energy content of plastics, 15 to 40 wt% of plastics waste is deposed into water bodies 8 and remarkable part (21‐42 wt%) is placed in landfills 9 …”

Section: Introductionmentioning

confidence: 99%

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H ₂ rich syngas

et al. 2020

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In this work, the co-pyrolysis of pine sawdust and low-density polyethylene (LDPE) was performed in a two-stage fixed-bed reactor to achieve hydrogenrich syngas and to investigate the effect of the parameters on gas yield and composition. Gas chromatography was used to confirm the content of the gas products. The pyrolysis was supported with Ni (in 5-25 wt%) loaded on activated carbon (AC). The maximum hydrogen concentration was 392.8 mmol g −1 sample, which was achieved by the use of the 10% Ni-AC catalyst. The influence of Ni loading on supporter was investigated by scanning electron microscope and transmission electron microscope techniques besides the thermogravity analysis. The increasing size of the Ni particles can be observed as a function of the Ni concentration on the catalyst. Carbon deposition was detected and the amorphous carbon seems more dominant than filamentous form. In addition, the effect of fluid residence time (water inlet and purge gas) on syngas yield was studied. Three different fluid residence times were investigated, and among them, the highest hydrogen yield was 392.8 mmol g −1 sample at 1.57 minutes residence time. Furthermore, the catalyst lifetime was studied using 10 wt% of Ni containing AC, and the average hydrogen concentration was 196.0 mmol g −1 sample over 15 cycles.

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Cellulose polymer composites (WPC)

Cited by 16 publications

References 29 publications

Tensile behaviour of dislocated/crystalline cellulose fibrils at the nano scale

Tensile behaviour of dislocated/crystalline cellulose fibrils at the nano scale

Bio-Polyethylene-Based Composites Reinforced with Alkali and Palmitoyl Chloride-Treated Coffee Silverskin

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H ₂ rich syngas

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Cellulose polymer composites (WPC)

Cited by 16 publications

References 29 publications

Tensile behaviour of dislocated/crystalline cellulose fibrils at the nano scale

Tensile behaviour of dislocated/crystalline cellulose fibrils at the nano scale

Bio-Polyethylene-Based Composites Reinforced with Alkali and Palmitoyl Chloride-Treated Coffee Silverskin

Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H 2 rich syngas

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Catalytic co‐pyrolysis of packaging plastic and wood waste to achieve H ₂ rich syngas