Ara es mostren els items 1-15 de 15

    • Alternative chemo-enzymatic treatment for homogeneous and heterogeneous acetylation of wood fibers 

      Quintana, Elisabet; Ago, Mariko; Valls Vidal, Cristina; Roncero Vivero, María Blanca; Rojas, Orlando J. (2018-07-18)
      Article
      Accés obert
      A new chemo-enzymatic treatment is proposed to produce cellulosic fibers suitable for heterogeneous- or homogeneous-phase acetylation. The procedure included enzymatic (laccase–violuric acid) lignin removal from the precursor ...
    • Assessment of the potential of enzymes to produce dissolving pulps 

      Valls Vidal, Cristina; Quintana, Elisabet; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (Universidade de Aveiro, 2018)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In this work, a totally chlorine free (TCF) sequence including a laccase-mediator system was developed in a softwood sulfite pulp. Then, purification was carried out employing strong alkaline extractions and hydrolytic ...
    • Bacterial cellulose-chitosan paper with antimicrobial and antioxidant activities 

      Cabañas Romero, L. Verónica; Valls Vidal, Cristina; Valenzuela, Susana V.; Roncero Vivero, María Blanca; Javier Pastor, F.I.; Diaz Lucea, M. Pilar; Martínez Martínez, Josefina (2020-03-12)
      Article
      Accés obert
      The production of paper-based bacterial cellulose-chitosan (BC-Ch) nanocomposites was accomplished following two different approaches. In the first, BC paper sheets were produced and then immersed in an aqueous solution ...
    • Cellulose acetate films from chemo-enzymatic dissolving pulps 

      Quintana, Elisabet; Ago, Mariko; Valls Vidal, Cristina; Fernández Santos, Julia; Roncero Vivero, María Blanca; Rojas, Orlando J. (2022)
      Comunicació de congrés
      Accés obert
      The purpose of this work is to obtain dissolving cellulose fibers that are suitable for the manufacturing of cellulose derivatives. Therefore, the combination of enzymatic and chemical treatments during the bleaching stage ...
    • Diseño de costes de una empresa industrial productora de pasta de celulosa 

      López Ruz, Laura (Universitat Politècnica de Catalunya, 2020-06)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      Realitzat a/amb:   Universidad de Buenos Aires
    • Dissolving-grade pulp: a sustainable source for fiber production 

      Quintana, Elisabet; Valls Vidal, Cristina; Roncero Vivero, María Blanca (2024-01-10)
      Article
      Accés obert
      The global textile fiber output increased five times from 1975 to 2020. Also, in 2010, the combined demand for man-made and natural fibers was projected to increase by 84% within 20 years. Clothing materials are largely ...
    • Enhanced fully cellulose based forward and reverse blood typing assay 

      Casals Terré, Jasmina; Farré Lladós, Josep; López Martínez, Joan Antoni; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2019-05-07)
      Article
      Accés obert
      This study presents an enhanced paper-based analytical device (PAD) for forward and reverse group blood typing. The proposed PAD uses a novel methodology, which provides highly reliable results on a fully cellulose based ...
    • Estudi de la modificació de suports cel·lulòsics per a l'obtenció de dispositius microfluídics 

      Brañes Hipolito, Joan Carles (Universitat Politècnica de Catalunya, 2015-06)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Els dispositius microfluídics en suport cel·lulòsic ofereixen un nou sistema per al maneig de fluids i anàlisi de l’analit per a una gran varietat d'aplicacions, incloent el diagnòstic de salut, la vigilància ambiental i ...
    • Estudi de l’impacte d’un tractament biotecnològic en l’envelliment i degradació de fibres d’ecualiptus 

      Herrerías Serrano, Xavier (Universitat Politècnica de Catalunya, 2015-06-22)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Es partirà de tres mostres de fibres d’eucaliptus amb diferents continguts d’àcids hexenurònics i de lignina, segons el procés de fabricació. S’aplicaran tractaments biotecnològics i químics sobre cadascuna de les mostres. ...
    • Exploring the effects of treatments with carbohydrases to obtain a high-cellulose-content pulp from a non-wood alkaline pulp 

      Beltramino Heffes, Facundo; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2015-07-14)
      Article
      Accés obert
      In this work, treatments with a xylanase (X) and carbohydrases mixture (Cx) were 19 applied on a TCF bleached sisal pulp in order to obtain high-cellulose content fibers 20 applicable on a wide range of uses. A limit of ...
    • Influence of enzyme and chemical adsorption on the thermal degradation path for eucalyptus pulp 

      Barneto, A. G.; Valls Vidal, Cristina; Ariza, José; Roncero Vivero, María Blanca (2013)
      Article
      Accés restringit per política de l'editorial
      Changes in thermal degradation path of eucalyptus pulp support enzymes (laccase from Trametes villosa) and chemicals (Tris–HCl or tartrate–tartaric buffer) adsorption on cellulose during biobleaching, thereby increasing ...
    • Investigation of catalyst and solvent systems for the catalytic oxidation of Kraft lignin 

      Mora Mir, Joan (Universitat Politècnica de Catalunya / Eidegenössische Technische Hochschule Zürich, 2010)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      Lignin is one of the main constituents of wood together with cellulose and hemicellulose and can be used as a renewable feedstock for the production of chemicals. Lignin is an amorphous polymer which is separated from ...
    • Laccase/TEMPO-mediated bacterial cellulose functionalization: production of paper-silver nanoparticles composite with antimicrobial activity 

      Morena Gatius, Ángela Gala; Roncero Vivero, María Blanca; Valenzuela, Susana V.; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Javier Pastor, F.I.; Diaz Lucea, M. Pilar; Martínez Martínez, Josefina (2019-01-01)
      Article
      Accés obert
      Bacterial cellulose (BC) was functionalized applying the Laccase/TEMPO oxidative treatment, leading to a five-fold increase of the concentration of carboxyl groups. Paper produced with this cellulose showed improved ...
    • Potencial de la celulosa en la construcción de nuevos materiales 

      Vidal Lluciá, Teresa; Torres López, Antonio Luis; Valls Vidal, Cristina; Cusola Aumedes, Oriol; López Martínez, Joan Antoni; Fernández Santos, Julia; Clemente Escuin, Antonio; Roncero Vivero, María Blanca; Casals Terré, Jasmina; Farré Lladós, Josep (2019)
      Text en actes de congrés
      Accés obert
      Actualmente, más de una tercera parte de los tipos de papeles que hoy empleamos son para nuevos usos que hace diez años no existían. Además, la demanda creciente de productos basados en materias primas renovables y la ...
    • Valorization of paper waste sludge to produce films for packaging 

      Quintana, Elisabet; Valls Vidal, Cristina; Roncero Vivero, María Blanca (Ca' Foscari University of Venice, 2023)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The global production of paper was more than 400 million tons in 2020, and about 40–50 kg of dry sludge/ton paper produced was generated. The management of this huge volume of solid waste material has become a serious ...