BackExaminar Artículos por departamento (eus.) "Ingeniaritza Kimikoa eta Ingurumenaren Ingeniaritza"
Now showing items 1-20 of 22
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Antioxidant activity of phenolic compounds obtained by autohydrolysis of corn residues
(2012-03)This study aimed to evaluate the effect of autohydrolysis temperature of corn residues in the antioxidant activity of the phenolic compounds extracted from the liquid phase. The treatments were carried out at 160, 180, ... -
Assessment of green approaches for the synthesis of physically crosslinked lignin hydrogels
(Elsevier, 2019-09-28)Lignin is an excellent candidate to be used as a starting material for hydrogel synthesis due to its highly functional character. The exhaustible character of the fossil resources linked to the increase of plastic residues ... -
Fractionation of non-timber wood from Atlantic mixed forest into high-value lignocellulosic materials
(Taylor & Francis, 2020-03-10)[EN] The forestry industry in the Basque Country has experienced an abandonment of small-sized forests in which native and introduced species tend to regrow if unattended; thus, requiring an intervention under which proper ... -
High levels of molecular orientation of surface azo chromophores can be optically induced even in a wet biological environment
(2013-09-18)We have developed polyelectrolyte multilayer bio-films containing azobenzene chromophores that enhance reversible photo-orientation upon irradiation with linearly polarized light, to effect surface photoswitching of ... -
HMF hydrogenolysis over carbon-supported Ni-Cu catalysts to produce hydrogenated biofuels
Viar Antuñano, Nerea
; Requies Martínez, Jesús María ; ; Iriondo Hernández, Aitziber ; ; (Elsevier, 2022-06-02)
Non-noble monometallic and bimetallic catalysts supported in biomass-derived carbon were tested in the 2,5-dimethylfuran (DMF) and 2,5-dimethyltetrahydrofuran (DMTHF) production from 5-hydroxymethylfurfural (HMF) hydrogenolysis ... -
Hybrid and biocompatible cellulose/polyurethane nanocomposites with water-activated shape memory properties
(Elsevier, 2019-04-03)[EN] Water-activated shape memory bacterial cellulose/polyurethane nanocomposites were prepared by the immersion of bacterial cellulose (BC) wet membranes into waterborne polyurethane (WBPU) dispersions for different times. ... -
Hybrid materials based on azopolymer and sol-gel synthesized silver-containing titanium oxide nanoparticles with photoinduced birefringence
; Gutiérrez Cáceres, Juncal; ; Tercjak Sliwinska, Agnieszka (The Royal Society of Chemistry, 2015-01-28)
The main goal of this work was the development of novel nanocomposite films with different optical properties. A non-toxic water soluble azopolymer was modified with TiO2 nanoparticles and silver containing TiO2 nanoparticles. ... -
Hydrogen-rich gas production by continuous pyrolysis and in-line catalytic reforming of pine wood waste and HDPE mixtures
; ; López Zabalbeitia, Gartzen; ; ; ; Olazar Aurrecoechea, Martin (Elsevier, 2017-01-12)
The continuous pyrolysis-reforming of pine sawdust and high density polyethylene mixtures (25, 50 and 75 wt% HDPE) has been performed in a two-stage reaction system provided with a conical spouted bed reactor (CSBR) and ... -
Hydrogenolysis of 5-hydroxymethylfurfural to produce 2,5-dimethylfuran over ZrO2 supported Cu and RuCu catalysts
Requies Martínez, Jesús María; ; ; Iriondo Hernández, Aitziber ; ; Viar Antuñano, Nerea (ACS, 2018-07-13)
Glucose dehydration to HMF and its hydrogenolysis to DMF, a suitable biofuel, have been studied using the same catalysts for both processes. The 10CuZr catalyst shows the highest HMF yield (25.6%) with an acceptable glucose ... -
Morphological study and photo-addressing in poly(styrene-b-butadiene-b-styrene) block copolymers with azobenzene groups and polystyrene matrix: influence of chemical bonding
(2011-01-25)The main goal of this work was the synthesis of new azo-functionalized block copolymers (BCP) from epoxidized poly(styrene-b-butadiene-b-styrene) modified with azobenzene groups by one-step facile reaction between the ... -
Multiproduct biorefinery based on almond shells: impact of the delignification stage on the manufacture of valuable products
; Hernández Ramos, Fabio; ; ; ; ; ; (Elsevier, 2020-07-22)
In this work, an integral valorisation of almond shells through a biorefinery approach was studied. The three main components of almond shells were extracted, isolated and characterised. The autohydrolysis process permitted ... -
Optically active multilayer films based on chitosan and an azopolymer
; ; ; ; Tercjak Sliwinska, Agnieszka (2014-02-24)
The layer-by-layer technique has been widely adopted for the fabrication of nanostructures with tailored properties. In this work, photoactive multilayer films consisting of alternating layers of chitosan and an azopolymer ... -
Optimal design and operation of distributed electrical generation for Italian positive energy districts with biomass district heating
(Elsevier, 2022-07-06)[EN] The active participation of prosumers within the energy generation and distribution stages has revolutionized the energy market favoring the rise of decentralized energy supply configurations and representing a key ... -
Photo-active chitosan-based hybrid films
; ; ; Barandiaran Olaetxea, Irati; Kortaberria Altzerreka, Galder ; Gutiérrez Cáceres, Juncal; Tercjak Sliwinska, Agnieszka (2019-11-15)
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Properties of flexible polyurethane foams with isocyanate functionalized lignin
(Elsevier, 2017-02-20)A commercial kraft lignin (k-lignin) was successfully functionalized by means of the reaction of an isocyanate group from isophorone diisocyanate (IPDI) with hydroxyl groups present in lignin (k-IPDI), for their further ... -
Shape-memory properties of crosslinked biobased polyurethanes
(2016-03-25)Biobased crosslinked polyurethanes were synthesized and characterized as shape-memory polymers. Both the macrodiol and the diisocyanate were derived from renewable sources; the first one from castor oil, and the second one ... -
Simultaneous Microwave-Ultrasound Assisted Extraction of Bioactive Compounds from Bark
(2020-08-22)Larix decidua is one of the fastest growing conifers and one of the most important coniferous tree species in Europe with high importance at wood-based industry; however, the bark generated from the debarking process is ... -
Strategies to Improve Hazardous Waste Management at the Faculty of Engineering Vitoria-Gasteiz UPV/EHU
; ; ; Encinas Malagón, María Dolores; (2020-10-01)
[EN] Universities, considered as agents of social change, are essential for providing knowledge, innovations and solutions to the community, in order to nurture future leaders towards sustainable development. Therefore, ... -
Synthesis and characterisation of polyurethane elastomers with semi-products obtained from polyurethane recycling.
(2016-10-01)In this work polyurethane elastomers were synthesised by using different mixtures of a petrochemical and glycerolysate polyols and 4,4-diphenylmethane diisocyanate (MDI). Glycerolysate polyol was produced from polyurethane ... -
Synthesis and characterization of polyurethanes with high renewable carbon content and tailored properties.
(2016-08-31)Thermoplastic and cross-linked biobased polyurethanes with a renewable carbon content ranging from 78 to 98% were synthesized and characterized. The macrodiol and the diisocyanate used were derived from renewable source, ...