Exploració per tema "Paper -- Química"

Ara es mostren els items 1-8 de 8

    • A new use for TCF pulp with a high hexenuronic acid content 

      Valls Vidal, Cristina; Roncero Vivero, María Blanca (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The importance of HexA groups lies on their influence on the bleaching process and the properties of the resulting pulp. In this work, various aspects of HexA were examined in order to elucidate their role in eucalyptus ...

    • Effect of residual lignin and heteropolysaccharides in nanofibrillar cellulose and nanopaper from wood fibers 

      Ferrer Carrera, Ana; Quintana, Elisabet; Filpponen, Ilari; Solala, Iina; Vidal Lluciá, Teresa; Rodríguez Pascual, Alejandro; Laine, Janne; Rojas, Orlando J. (2012-12)
      Article
      Accés restringit per política de l'editorial
      Unbleached (UN), oxygen-delignified and fully-bleached (FB) birch fibers with a residual lignin content of ca. 3, 2 and\1 %, respectively, were used to produce nanofibrillated cellulose (NFC) and nanopaper by using an ...

    • Effect of the laccase mediator system on the fibre properties of TCF bleached kraft pulp 

      Cadena Chamorro, Edith Marleny; Cusola Aumedes, Oriol; Vidal Lluciá, Teresa; Torres López, Antonio Luis (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The application of the laccase mediator system (L stage) to TCF bleached pulp from Eucalyptus globulus with a low residual lignin content provides useful information about its effect in the hexenuronic acids content, ...

    • Functionalization of cellulosic model substrates via laccase-mediated coupling of non-polar particles 

      Cusola Aumedes, Oriol; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca; Rojas, Orlando J. (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In the present work we investigate the physicochemical interactions between silica and nanofibrillar cellulose (CNF) with a multi component system (MCS) obtained from an enzymatic reaction of a laccase enzyme and a short-chain ...

    • Functionalization of cellulosic substrates using a product derived from an enzymatic reaction 

      Cusola Aumedes, Oriol; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The present work describes a new method for the surface functionalization of cellulosic sheets, overcoming the limitations of the traditional treatments, which are usually performed using fibrous suspensions. The method ...

    • Inter-laboratory comparisons of hexenuronic acid measurements in kraft eucalyptus pulps using a UV-Vis spectroscopic method 

      Zhu, Yufan; Zhou, H.F; Chai, X.S; Johannes, Donna; Pope, Richard; Valls Vidal, Cristina; Roncero Vivero, María Blanca (2014-01-01)
      Article
      Accés restringit per política de l'editorial
      An inter-laboratory comparison of a UV-Vis spectroscopic method (TAPPI T 282 om-13 “Hexeneuronic acid content of chemical pulp”) for hexeneuronic acid measurements was conducted using three eucalyptus kraft pulps. The pulp ...

    • Laccase-mediated coupling of nonpolar chains for the hydrophobization of lignocellulose 

      García Ubasart, Jordi; Vidal Lluciá, Teresa; Torres López, Antonio Luis; Rojas, Orlando J. (2013-04-09)
      Article
      Accés restringit per política de l'editorial
      We investigate the use of laccase enzymes to couple short nonpolar chains containing aromatic groups onto flax fibers and nanofibrillated cellulose (NFC) with different lignin contents. Trametes villosa, Pycnoporus ...

    • Structural insights on laccase biografting of ferulic acid onto lignocellulosic fibers 

      Rencoret, Jorge; Aracri, Elisabetta; Gutíerrez, Ana; del Río, José C.; Torres López, Antonio Luis; Vidal Lluciá, Teresa; Martínez, Ángel T. (2014-05-15)
      Article
      Accés restringit per política de l'editorial
      Treatment of high-kappa sisal pulp with Trametes villosa laccase and ferulic acid resulted in strong increases of kappa-number and acid-group content due to biografting of this phenolic acid, as shown by pyrolysis in the ...