Browsing by Subject "Pasta de paper"

Now showing items 1-16 of 16

    • A facile and green method to hydrophobize films of cellulose nanofibrils and silica by laccase-mediated coupling of nonpolar colloidal particles 

      Cusola Aumedes, Oriol; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa; Rojas, Orlando J. (2014-10-01)
      Article
      Restricted access - publisher's policy
      Hydrophobic particles based on dodecyl 3,4,5-trihydroxybenzoate (LG) were coupled onto the surface of cellulose nanofibrils (CNFs) and silica by treatment with a multicomponent colloidal system (MCS) derived from the ...

    • 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
      Open Access
      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 ...

    • Appilcation of response surface methodology (RSM) for optimization of COD, UV254 and UV280 removal in black liquor effluent by Fenton reagent 

      Torrades Carné, Francesc; Garcia Hortal, José Antonio; Folqués, Omar (2015)
      Conference lecture
      Restricted access - publisher's policy
      This study focused on the application of the Response Surface Methodology (RSM) to determine the effects of operational parameters on the dark Fenton oxidation of a barley straw effluent (BSE) in a lab-scale experiment, ...

    • 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)
      Conference lecture
      Restricted access - publisher's policy
      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 for increasing barrier properties of paper products 

      Fillat Latorre, Amanda; Martinez, Josefina; Valls Vidal, Cristina; Cusola Aumedes, Oriol; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa; Valenzuela, Susana V.; Diaz Lucea, M. Pilar; Pastor Blasco, Francisco Ignacio Javier (2018-08-07)
      Article
      Open Access
      Bacterial cellulose was combined with wood cellulose papers in order to obtain biomaterials with increased barrier properties. For this purpose, different parameters were assessed: two producing bacterial strains ...

    • 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
      Open Access
      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 ...

    • Blanqueo de pastas en la industria papelera 

      García Hortal, José Antonio; Vidal Lluciá, Teresa (U.P.C., E.T.S.I.I. de Terrassa, 1984)
      Book
      Open Access

    • 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)
      Conference lecture
      Open Access
      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)
      Bachelor thesis
      Restricted access - confidentiality agreement
      Covenantee:   Universidad de Buenos Aires

    • Effectiveness of novel xylanases belonging to different GH families on lignin and hexenuronic acids removal from specialty sisal fibres 

      Valenzuela Mayorga, Susana Valeria; Valls Vidal, Cristina; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa; Díaz Lucea, Pilar; Pastor Blasco, Francisco Ignacio Javier (2014)
      Article
      Restricted access - publisher's policy
      Background: The effectiveness of xylanases on lignin removal from pulps differs widely depending on the enzyme family, the type of pulp and the bleaching sequence among other factors. Xylanases can also reduce the presence ...

    • 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
      Open Access
      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)
      Bachelor thesis
      Restricted access - author's decision
      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)
      Bachelor thesis
      Restricted access - author's decision
      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. ...

    • 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)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      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
      Open Access
      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)
      Conference report
      Open Access
      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 ...