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1. 1. On the interactions in cellulose systems : surface forces and adsorption

   Författare :Monika Österberg; KTH; []
   Nyckelord :cellulose; hemicellulose; xylan; lignin; surface forces; adsorption; polyelectrolyte; SFA; AFM; ESCA; Langmuir-Blodgett films; chitosan; steric forces; bridging; adhesion;

   Sammanfattning : In this thesis the interactions in cellulose systems havebeen studied with emphasis on surface forces and adsorptionphenomenon. The study was limited to surfaces and polymers ofinterest for papermaking. LÄS MER

3. 2. Fibre surface properties of kraft pulp : The influence of wood raw material, bleaching and storage

   Författare :Gerd Wäne; Ulf Germgård; Pedro Fardim; Karlstads universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Engineering; Kemiteknik;

   Sammanfattning : The aim of this thesis was to study the fibre surface properties of Birch (Betula ssp.), Eucalyptus (E. urograndis and E. globulus) and Spruce (Picea Abies) pulps bleached using two different methods: ECF (Elementary Chlorine Free) and TCF (Totally Chlorine Free). LÄS MER

4. 3. Probing Interactions between Bio-Fibre Components

   Författare :Niklas Nordgren; Mark Rutland; Harry Brumer; Vincent Bulone; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; AFM; QCM-D; cellulose; xyloglucan; surface forces; friction; colloidal probe; nanotribology; biomimetic; enzymatic; polysaccharide; self assembly; grafting; thiol; spring constant; calibration; photodetector calibration.; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : I den här avhandlingen har atomkrafts mikroskopi (AFM) och kvartskristall mikrovåg med dissipation (QCM-D) används för att undersöka interaktioner i bio-fiber modell system av cellulosa och xyloglukan (XG); en naturligt förekommande polysackarid viktig för tillväxt av träd och andra växter. Dessutom har det avgörande momentet av friktionskrafts-kalibrering studerats för att erhålla noggranna och kvantitativa resultat med kolloidal prob AFM. LÄS MER

5. 4. Interfacial Adhesion Failure : Impact on print-coating surface defects

   Författare :Hajer Kamal Alm; Lars Wågberg; Göran Ström; Janet Preston; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ink-paper coating adhesion; offset printing; calcium carbonate pigments; polyacrylate; dispersant; print mottle; surface chemistry; hygroscopy of surfaces; coating structure; print quality; water interference mottle; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : The aim of this work was to develop a solid knowledge on formulation effects controlling offset ink-paper coating adhesion and to identify key factors of the coating and printing process affecting it. Focus lay on comprehending the impact of pigment dispersant on ink-paper coating adhesion and ultimately on the print quality of offset prints. LÄS MER

7. 5. Orientation of fibres in suspensions flowing over a solid surface

   Författare :Allan Carlsson; Daniel Söderberg; Fredrik Lundell; Staffan Toll; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fluid mechanics; fibre orientation; shear flow; fibre suspension; papermaking; Fluid mechanics; Strömningsmekanik;

   Sammanfattning : The orientation of fibres suspended in a viscous fluid, flowing over a solid surface, has been studied experimentally. A shear layer was generated, by letting the suspension flow down an inclined plate. LÄS MER