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Browsing NTNU Open by Author "Syverud, Kristin"

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    • Cellulose Nanofibrils as Paper Additive and Coating Material: Properties, Distribution and Interaction Effects 

      Ottesen, Vegar (Doctoral theses at NTNU;2018:115, Doctoral thesis, 2018)
      Cellulose is well-known as the most common bio-polymer on earth. In the cell wall of most plants, it is organized in nanoscopic structures with interesting properties for a wide range of applications, among them as an ...
    • Cellulose nanofibrils as rheology modifier in mayonnaise – A pilot scale demonstration 

      Heggset, Ellinor Bævre; Aaen, Ragnhild; Veslum, Trinelise; Henriksson, Marielle; Simon, Sebastien Charles; Syverud, Kristin (Peer reviewed; Journal article, 2020)
      The applicability of cellulose nanofibrils (CNFs) as viscosifying agent in a starch-reduced low-fat mayonnaise and in an oil-reduced full-fat mayonnaise has been considered. For low-fat mayonnaise a 50 wt% reduction in the ...
    • Cellulose nanofibrils as rheology modifiers and stabilizers in food systems 

      Aaen, Ragnhild (Doctoral theses at NTNU;2020:291, Doctoral thesis, 2020)
      Food additives are components used in many food products to improve qualities such as flavor, appearance or texture. In low-fat and non-fat food products, food additives called fat-replacers are added to the food products ...
    • Coatability of cellulose nanofibril suspensions: Role of rheology and water retention 

      Kumar, Vinay; Ottesen, Vegar; Syverud, Kristin; Gregersen, Øyvind Weiby; Toivakka, Martti (Journal article; Peer reviewed, 2017)
      Cellulose nanofibril (CNF) suspensions are not easily coatable because of their excessively high viscosity and yield stress, even at low solids concentrations. In addition, CNF suspensions vary widely in their properties ...
    • Coating 3D Printed Polycaprolactone Scaffolds with Nanocellulose Promotes Growth and Differentiation of Mesenchymal Stem Cells 

      Elsebahy, Ahmad Rashad Saad Mohamed; Mohamed-Ahmed, Samih; Ojansivu, Miina; Berstad, Kaia; Yassin, Mohammed Ahmed; Kivijärvi, Tove; Heggset, Ellinor Bævre; Syverud, Kristin; Mustafa, Kamal Babikeir Eln (Journal article; Peer reviewed, 2018)
      3D printed polycaprolactone (PCL) has potential as a scaffold for bone tissue engineering, but the hydrophobic surface may hinder optimal cell responses. The surface properties can be improved by coating the scaffold with ...
    • Construction of Nanocellulose Microcapsules for Research and Sensor Applications 

      Tonstad, Sandra Karen (Master thesis, 2018)
      Nanocellulose microcapsules with internal hollows have previously been found to form when cellulose nanofibrils (CNF) are added to paper pulp before drying. In an effort to study such capsules removed from the paper matrix, ...
    • A core flood and microfluidics investigation of nanocellulose as a chemical additive to water flooding for EOR 

      Aadland, Reidun Cecilie Grønfur; Akarri, Salem Saeed Fadhl; Heggset, Ellinor Bævre; Syverud, Kristin; Torsæter, Ole (Peer reviewed; Journal article, 2020)
      Cellulose nanocrystals (CNCs) and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibrils (T-CNFs) were tested as enhanced oil recovery (EOR) agents through core floods and microfluidic experiments. ...
    • Cross-linking oxidized cellulose nanofibrils for the formation of stable hydrogel structures 

      Pettersen, Sigurd Rolland (Master thesis, 2013)
      The main goal of this project was to investigate whether the elastic properties of microfibrillated cellulose (MFC) suspensions pre-treated by TEMPO-mediated oxidation could be controlled by inducing cross-links between ...
    • Cytocompatibility and Functionalization of Nanocellulose for Bone Tissue Engineering Applications 

      Grøndahl, Martha (Master thesis, 2019)
      I denne masteroppgaven er overflateegenskaper til nanocellulosegeler som armering (scaffold) innenfor benvevsregenererings (BVR) applikasjoner utforsket. Nanocellulose er et materiale av stor interesse innenfor mange ...
    • Development of Kraft Lignin and Coating Technique to Prepare Coated Urea Fertilizers with Increased Nutrient Use Efficiency 

      Xu, Xueyan (Master thesis, 2017)
      Coating urea to prepare controlled release N-fertilizer has been considered as an effective way to increase its nutrient use efficiency, thus reduce its waste and the consequent harmful environmental impacts. Inorganic ...
    • Experimental Study of Flow of Nanocellulose in Porous Media for Enhanced Oil Recovery Application 

      Aadland, Reidun Cecilie Grønfur (Doctoral theses at NTNU;2019:339, Doctoral thesis, 2019)
    • Fundamental properties of nanocelluloses, and teir application in membranes for CO2 Separation 

      Torstensen, Jonathan Økland (Doctoral theses at NTNU;2019:146, Doctoral thesis, 2019)
    • High-Temperature Core Flood Investigation of Nanocellulose as a Green Additive for Enhanced Oil Recovery 

      Aadland, Reidun Cecilie Grønfur; Jakobsen, Trygve Dagsloth; Heggset, Ellinor Bævre; Long-Sanouiller, Haili; Simon, Sebastien Charles; Paso, Kristofer Gunnar; Syverud, Kristin; Torsæter, Ole (Journal article; Peer reviewed, 2019)
      Recent studies have discovered a substantial viscosity increase of aqueous cellulose nanocrystal (CNC) dispersions upon heat aging at temperatures above 90 °C. This distinct change in material properties at very low ...
    • Identification of Nanocellulose Retention Characteristics in Porous Media 

      Aadland, Reidun Cecilie Grønfur; Dziuba, Carter Jordan; Heggset, Ellinor Bævre; Syverud, Kristin; Torsæter, Ole; Holt, Torleif; Gates, Ian D.; Bryant, Steven (Journal article; Peer reviewed, 2018)
      The application of nanotechnology to the petroleum industry has sparked recent interest in increasing oil recovery, while reducing environmental impact. Nanocellulose is an emerging nanoparticle that is derived from trees ...
    • Inflammatory responses and tissue reactions to wood-Based nanocellulose scaffolds 

      Elsebahy, Ahmad Rashad Saad Mohamed; Suliman, Salwa; Mustafa, Manal; Pedersen, Torbjørn Østvik; Campodoni, Elisabetta; Sandri, Monica; Syverud, Kristin; Mustafa, Kamal Babikeir Eln (Peer reviewed; Journal article, 2019)
      Two wood-derived cellulose nanofibril (CNF) porous scaffolds were prepared by TEMPO-oxidation and carboxymethylation. The effects of these scaffolds on the production of inflammatory cytokines by human macrophage-like cells ...
    • Interactions between Surfactants and Cellulose Nanofibrils for Enhanced Oil Recovery 

      Jakobsen, Trygve Dagsloth; Simon, Sebastien Charles; Heggset, Ellinor Bævre; Syverud, Kristin; Paso, Kristofer Gunnar (Journal article; Peer reviewed, 2018)
      Chemical enhanced oil recovery (EOR) represents a series of potential solutions for extracting more oil from resources with already known locations and magnitudes. Unfortunately, many of the chemical additives in use today ...
    • Investigation of a new application for cellulose nanocrystals: a study of the enhanced oil recovery potential by use of a green additive 

      Molnes, Silje; Mamonov, Aleksandr; Paso, Kristofer Gunnar; Strand, Skule; Syverud, Kristin (Journal article; Peer reviewed, 2018)
      Cellulose nanocrystals (CNC) were investigated for use in a potential new application, enhanced oil recovery. Core flooding experiments were performed on outcrop sandstone cores using CNC particles dispersed in low salinity ...
    • Mechanical properties of cellulose nanofibril films: effects of crystallinity and its modification by treatment with liquid anhydrous ammonia 

      Ottesen, Vegar; Larsson, Per Tomas; Chinga-Carrasco, Gary; Syverud, Kristin; Gregersen, Øyvind Weiby (Journal article; Peer reviewed, 2019)
      The influence of cellulose crystallinity on mechanical properties of cellulose nano-fibrils (CNF) was investigated. Degree of crystallinity (DoC) was modified using liquid anhydrous ammonia. Such treatment changes crystal ...
    • Mechanical properties of composite hydrogels of alginate and cellulose nanofibrils 

      Aarstad, Olav Andreas; Heggset, Ellinor Bævre; Pedersen, Ina S.; Bjørnøy, Sindre Hove; Syverud, Kristin; Strand, Berit Løkensgard (Journal article; Peer reviewed, 2017)
      Alginate and cellulose nanofibrils (CNF) are attractive materials for tissue engineering and regenerative medicine. CNF gels are generally weaker and more brittle than alginate gels, while alginate gels are elastic and ...
    • Mixing of cellulose nanofibrils and individual furnish components: Effects on paper properties and structure 

      Ottesen, Vegar; Syverud, Kristin; Gregersen, Øyvind Weiby (Journal article; Peer reviewed, 2016)
      Thermo-mechanical pulp (TMP) handsheets with different fractions of cellulose nano fibrils (CNF) and ground calcium carbonate (GCC) were made. CNF and retention chemicals were added in three different ways; to GCC, to long ...

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