Manufacture of fibrous reinforcements for biodegradable biocomposites from <i>Citysus scoparius</i>

González, Daniel; Campos, Ana Rita; Cunha, António M.; Santos, Valentín; Parajó, Juan Carlos

doi:10.1002/jctb.2555

Cited by 13 publications

(21 citation statements)

References 27 publications

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“…Autohydrolysis processing of broom branches with hot compressed water has been proposed to produce a solid‐containing fraction mainly made up of cellulose and lignin and a liquid phase containing sugar oligomers derived from hemicelluloses. The solid phase was used for manufacturing polylactic acid based biodegradable composites, and the sugar oligomers in the soluble fraction could be suitable as prebiotic agents . However, in this soluble phase a phenolic fraction is also present.…”

Section: Introductionmentioning

confidence: 78%

“…Cellulose (27.3–28.5%) was the major structural fraction, followed by acid insoluble lignin (19.3–22.8%) and hemicelluloses (15.5–16.7%), which were mainly constituted of xylan, araban and acetyl groups. The hemicelluloses and Klason lignin contents were in the range reported for broom samples collected in Ourense (Spain), but significantly lower cellulose content was determined . Ammar et al found that compared with stems, leaves had a high nutritive value and were less affected by seasonal variations.…”

Section: Resultsmentioning

confidence: 99%

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Extraction of phenolics from broom branches using green technologies

González

Otero

Conde

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND The effective exploitation of plants as a biorenewable resource has very important significance for sustainable development. Broom (Cytisus scoparius) has been used and associated with healthy benefits in the Iberian Peninsula for a long time. With this in mind, different technologies, alone or in combination, have been proposed to obtain valuable compounds from broom branches. RESULTS Composition showed a seasonal variation. Periods that lead to higher content of extractives were selected to design a combined autohydrolysis and supercritical CO2 extraction process for the production of antioxidants. The autohydrolysis process leads to higher yields than conventional solvent extraction and SC–CO2 extraction produced a raffinate with radical scavenging capacity comparable with ethanolic extracts. The major bioactive compounds identified in extracts were flavonoids, phenolic acids and phenolic aldehydes. CONCLUSIONS An extraction process resulting from a combination of solvent extraction and autohydrolysis increased the extraction yields and the recovery of extracts containing bioactive compounds suitable for use in food, cosmetic and pharmaceutical applications. The knowledge gained from this study should be helpful to further exploit and apply this resource. © 2016 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Extraction of phenolics from broom branches using green technologies

González

Otero

Conde

et al. 2016

J of Chemical Tech & Biotech

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“…Young's modules of reinforced composites increase with respect to the neat PLA (PLA1 for ABF and ACW, and PLA2 for AEW and ARH) by 41-74%. Lower values for Young's modules (2.96 and 2.84 GPa for ABF and ACW, respectively) were achieved when the percentage of reinforced materials was 20 (Gonza´-lez, Campos, Cunha, Santos, & Parajo´, 2011;. Tensile strength presents a slight decrease in the reinforced composites except in the samples carried out with AEW.…”

Section: Cellulose and Lignin-enriched Solid For Biocomposites' Manufmentioning

confidence: 90%

“…This reduction in water absorption is ascribed to the selective removal of the more hydrophilic hemicelluloses and increase of lignin in the residual fibers. Higher percentages of reinforced fibers increased the water absorption (Gonza´lez, Campos, et al, 2011;.…”

Section: Cellulose and Lignin-enriched Solid For Biocomposites' Manufmentioning

confidence: 92%

“…As shown in Supplementary Figure 6, similar values, higher than neat PLA, were obtained with the autohydrolyzed fibers ABF and ACW. When compared with composites obtained using untreated source fibers (SCW), the autohydrolysis reduced the water absorption (Gonza´lez, Campos, et al, 2011;. This reduction in water absorption is ascribed to the selective removal of the more hydrophilic hemicelluloses and increase of lignin in the residual fibers.…”

Section: Cellulose and Lignin-enriched Solid For Biocomposites' Manufmentioning

confidence: 96%

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Biorefinery processes for the integral valorization of agroindustrial and forestal wastes Procesos de biorrefinería para la valorización integral de residuos agroindustriales y forestales

Alonso¹,

Domı́nguez²,

Garrote³

et al. 2011

CyTA - Journal of Food

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Teniendo en cuenta el concepto de biorrefinerı´a, los autores de esta revisio´n, que pertenecen al Departamento de Ingenierı´a Quı´mica de la Universidad de Vigo, en la Facultad de Ciencias, han desarrollado sus investigaciones en este campo. Esta revisio´n muestra el trabajo del grupo en las dos u´ltimas de´cadas, basado en el fraccionamiento de materiales lignocelulo´sicos (residuos forestales, industriales y agrı´colas) para obtener diferentes productos, tales como compuestos feno´licos con efectos antioxidantes, oligosaca´ridos con propiedades prebio´ticas, a´cido la´ctico, bioetanol, materiales compuestos, etc.

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Preparation and characterization of graphite oxide nano‐reinforced biocomposites from chicken feather keratin

Esparza

Ullah

2017

J of Chemical Tech & Biotech

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BACKGROUND Natural polymers have gained increased attention in reducing the dependence on petroleum‐based materials. Chicken feather proteins are an abundant industrial by‐product suitable for the fabrication of sustainable thermoplastics. However, protein‐based plastics generally exhibit poor physical and thermal properties which limit their application. In this research, the fabrication of feather keratin based nano‐reinforced biocomposites by the addition of graphite oxide (GO) in a reactive extrusion system were investigated. The effects of GO carbon/oxygen ratio (C/O, 2.48, 2.07, and 1.55) and concentration (0.5–2%) of the selected GO on the conformational, physical and thermal properties of thermoplastic films were investigated. RESULTS Chicken feather–GO nanocomposites were successfully prepared at 150 °C in the reactive extrusion system. Tensile strength and Young modulus of chicken feather plastic films were significantly increased without affecting their elongation using low GO concentrations (0.5 to 1.5% w/w of protein). Our results suggest that higher content of hydroxyl groups and increased graphene interlayer space in GO facilitated interactions with feather keratin and plasticizers. CONCLUSIONS Graphite oxide proved to be an inexpensive alternative to graphene for the reinforcement of protein based composites. Extrusion provided a cost‐effective and environment‐friendly method for the processing of sustainable composites. © 2017 Society of Chemical Industry

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Manufacture of fibrous reinforcements for biodegradable biocomposites from Citysus scoparius

Cited by 13 publications

References 27 publications

Extraction of phenolics from broom branches using green technologies

Extraction of phenolics from broom branches using green technologies

Biorefinery processes for the integral valorization of agroindustrial and forestal wastes Procesos de biorrefinería para la valorización integral de residuos agroindustriales y forestales

Preparation and characterization of graphite oxide nano‐reinforced biocomposites from chicken feather keratin

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