Browsing Artículos, Comunicaciones, Libros by Author "Eceiza, Arantxa"
Now showing items 21-40 of 64
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Enhanced stability of photo-induced anisotropy due to intermolecular interactions in an azo-prepolymer confined in block copolymer
Fernández Salvador, Raquel; Etxeberria Altuna, Haritz; Eceiza Mendiguren, María Aranzazu; Tercjak, Agnieszka (Elsevier, 2013-02-08)Many efforts in the field of azobenzene-containing polymers are concentrated on exploring new material concepts to obtain efficient and stable photo-induced anisotropy. Here, an easy approach to improve the birefringent ... -
Enhancing the Mechanical Properties of 3D-Printed Waterborne Polyurethane-Urea and Cellulose Nanocrystal Scaffolds through Crosslinking
Vadillo del Ser, Julen; Larraza Arocena, Izaskun; Calvo Correas, Tamara; Martín Alberdi, María Dolores; Derail, Christophe; Eceiza Mendiguren, María Aranzazu (MDPI, 2022-11-18)In this work, shape-customized scaffolds based on waterborne polyurethane-urea (WBPUU) were prepared via the combination of direct ink writing 3D-printing and freeze-drying techniques. To improve the printing performance ... -
Enzymatic upgrading of nanochitin using an ancient lytic polysaccharide monooxygenase
Barandiaran, Leire; Alonso Lerma, Borja; Reifs, Antonio; Larraza Arocena, Izaskun; Olmos Juste, Raquel; Fernández Calvo, Alba; Jabalera, Ylenia; Eceiza Mendiguren, María Aranzazu; Pérez Jiménez, Raúl (Springer Nature, 2022-08-15)Numerous enzymes have the potential to upgrade biomass, converting it into high-tech materials for new applications. However, the features of natural enzymes often limit their use beyond chemical conversion of the substrate. ... -
Enzymatically produced cellulose nanocrystals as reinforcement for waterborne polyurethane and its applications
Alonso Lerma, Borja; Larraza Arocena, Izaskun; Barandiaran Larrea, Leyre; Ugarte Soraluce, Lorena; Saralegui Otamendi, Ainara; Corcuera Maeso, María Ángeles; Pérez Jiménez, Raúl; Eceiza Mendiguren, María Aranzazu (Elsevier Ltd., 2021-02)[EN] Waterborne polyurethanes (WBPUs) have been proposed as ecofriendly elastomers with several applications in coatings and adhesives. WBPU’s physicochemical properties can be enhanced by the addition of cellulose ... -
Flexible polyurethane foams based on 100% renewably sourced polyols
Ugarte Soraluce, Lorena; Saralegui Otamendi, Ainara; Fernández Salvador, Raquel; Martín Alberdi, María Dolores; Corcuera Maeso, María Ángeles; Eceiza Mendiguren, María Aranzazu (Elsevier, 2014-10-5)Since polyol is one of the major components in polyurethane foam synthesis, introducing renewably sourced polyols in the foam formulation leads to materials with high renewable carbon content. A series of flexible ... -
Functional surfaces through the creation of adhesion and charged patterns on azopolymer surface relief gratings
Capeluto, Maria Gabriela; Falcione, Rebeca; Fernández Salvador, Raquel; Eceiza Mendiguren, María Aranzazu; Goyanes, Silvia; Ledesma, Silvia Adriana (2019-03-29)We show that an azopolymer can be used to create a supramolecular architecture in a parallel process with patterned surface properties. By illuminating with an interference pattern, we created adhesion and charge patterns ... -
Furan-containing biobased polyurethane nanofibers: A new versatile and green support clickable via Diels-Alder reaction
Torresi, Stefano; Calvo Correas, Tamara; Basasoro Garmendia, Senda; Guaresti Larrea, Olatz; Alonso Varona, Ana Isabel; Gabilondo López, Nagore; Eceiza Mendiguren, María Aranzazu (Elsevier, 2022-09)
A new biobased polyurethane formulation containing furan was synthesized and subsequently functionalized and de-functionalized via Diels-Alder and retro Diels-Alder reactions. Furan was inserted in the backbone polymer ... -
Generation of nanocomposites based on (PMMA-b-PCL)-grafted Fe2O3 nanoparticles and PS-b-PCL block copolymer
Barandiaran Olaetxea, Irati; Cappelletti, Ariel; Strumia, Miriam; Eceiza Mendiguren, María Aranzazu; Kortaberria Altzerreka, Galder (Elsevier, 2014-07-14)The aim of this work is to obtain a good dispersion of Fe2O3 magnetic nanoparticles into a PS-b-PCL diblock copolymer. For this purpose nanoparticles have been modified in their surface by grafting a PMMA-b-PCL block ... -
Generation of nanocomposites based on polystyrene grafted CdSe nanoparticles by grafting through and block copolymer
Etxeberria Altuna, Haritz; Zalakain, Iñaki; Mondragón Egaña, Iñaki Bixintxo; Eceiza Mendiguren, María Aranzazu; Kortaberria Altzerreka, Galder (Springer Nature, 2013-02-23)Continuing with our previous work, in which CdSe nanoparticles were functionalized with polystyrene (PS) brushes (CdSe-PS) by grafting through method, nanocomposites were prepared by adding them to a poly (styrene-b-buta ... -
Genome sequence and characterization of the bcs clusters for the production of nanocellulose from the low pH resistant strain Komagataeibacter medellinensis ID13488
Hernández‐Arriaga, Ana M.; Del Cerro, Carlos; Urbina Moreno, Leire; Eceiza Mendiguren, María Aranzazu; Corcuera Maeso, María Ángeles; Retegui Miner, Aloña; Prieto, M. Auxiliadora (Wiley, 2019-02-22)Komagataeibacter medellinensis ID13488 (formerly Gluconacetobacter medellinensis ID13488) is able to produce crystalline bacterial cellulose (BC) under high acidic growth conditions. These abilities make this strain desirable ... -
Hybrid and biocompatible cellulose/polyurethane nanocomposites with water-activated shape memory properties
Urbina Moreno, Leire; Alonso Varona, Ana Isabel; Saralegui Otamendi, Ainara; Palomares Casado, Teodoro; Eceiza Mendiguren, María Aranzazu; Corcuera, María Ángeles; Retegui Miner, Aloña (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
Fernández Salvador, Raquel; Gutiérrez Cáceres, Juncal; Eceiza Mendiguren, María Aranzazu; 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. ... -
Improving the Efficiency for the Production of Bis-(2-Hydroxyethyl) Terephtalate (BHET) from the Glycolysis Reaction of Poly(Ethylene Terephtalate) (PET) in a Pressure Reactor
Mendiburu Valor, Eider; Mondragón Otamendi, Gurutz; González, Nekane; Kortaberria Altzerreka, Galder; Eceiza Mendiguren, María Aranzazu; Peña Rodríguez, Cristina (MDPI, 2021-04-30)
The depolymerization process of PET by glycolysis into BHET monomer is optimized in terms of reaction temperature and time, by carrying out the process under pressure to be faster for reducing the energy required. Almost ... -
Influence of Process Parameters in Graphene Oxide Obtention on the Properties of Mechanically Strong Alginate Nanocomposites
Larraza Arocena, Izaskun; Ugarte Soraluce, Lorena; Fayanas, Aintzane; Gabilondo López, Nagore; Arbelaiz Garmendia, Aitor; Corcuera Maeso, María Ángeles; Eceiza Mendiguren, María Aranzazu (MDPI, 2020-02-28)Sodium alginate, a biopolymer extracted from brown algae, has shown great potential for many applications, mainly due to its remarkable biocompatibility and biodegradability. To broaden its fields of applications and improve ... -
Integral Valorization of Grape Pomace for Antioxidant Pickering Emulsions
Díaz Ramírez, Julen; Basasoro Garmendia, Senda; González Munduate, Kizkitza; Eceiza Mendiguren, María Aranzazu; Retegui Miner, Aloña; Gabilondo López, Nagore (MDPI, 2023-05-08)
Full harnessing of grape pomace (GP) agricultural waste for the preparation of antioxidant Pickering emulsions is presented herein. Bacterial cellulose (BC) and polyphenolic extract (GPPE) were both prepared from GP. ... -
Lignocellulosic Biomass as a Source of Raw Materials for the Synthesis of Polyurethanes
Calvo Correas, Tamara; Ugarte Soraluce, Lorena; Ochoa Gómez, Jose Ramón; Roncal, Tomás; Cristina, Diñeiro; Corcuera Maeso, María Ángeles; Eceiza Mendiguren, María Aranzazu (MDPI, 2018-11-06)Precursors have been satisfactorily synthesized from lignocellulosic biomass for later use in the synthesis of polyurethanes resulting in competitive final properties with those of petroleum derived polyurethanes -
Mechanical Properties of Three Bamboo Species: Effect of External Climatic Conditions and Fungal Infestation in Laboratory Conditions
Elejoste, Asier; Osa Amilibia, Juan Luis; Arevalillo Román, Alfonso; Eceiza Mendiguren, María Aranzazu; Abascal, José Miguel; Rico Martínez, José Miguel
; Butron Janices, Amaia; Peña Rodríguez, Cristina (MDPI, 2022-12-07)
Bamboo is a material with good tensile and flexural resistance. As a construction material with structural capacity, using bamboo implies considerable environmental advantages in relation to other typical materials such ... -
Microwave-assisted extraction of cellulose nanocrystals from almond (Prunus amygdalus) shell waste
Valdés, Arantzazu; Mondragón Otamendi, Gurutz; Garrigós, María Carmen; Eceiza Mendiguren, María Aranzazu; Jiménez Migallón, Alfonso (Frontiers Media, 2023-01)Almond (Prunus amygdalus) is one of the most common tree nuts on a worldwide basis. This nut is highly regarded in the food and cosmetic industries. However, for all these applications, almonds are used without their shell ... -
Modification of Pea Starch and Dextrin Polymers with Isocyanate Functional Groups
Hosseinpourpia, Reza; Santamaría Echart, Arantzazu; Adamopoulos, Stergios; Gabilondo López, Nagore; Eceiza Mendiguren, María Aranzazu (MDPI, 2018-09)Pea starch and dextrin polymers were modified through the unequal reactivity of isocyanate groups in isophorone diisocyanate (IPDI) monomer. The presence of both urethane and isocyanate functionalities in starch and dextrin ... -
Nonwoven Mats Based on Segmented Biopolyurethanes Filled with MWCNT Prepared by Solution Blow Spinning
Ramos, Pablo; Calvo Correas, Tamara; Eceiza Mendiguren, María Aranzazu; González Benito, Javier (MDPI, 2022-10-05)To prepare nonwoven mats constituted by submicrometric fibers of thermally responsive biopolyurethanes (TPU) modified with multiwalled carbon nanotubes (MWCNT), solution blow spinning (SBS) was used. The TPU was the product ...