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Browsing NTNU Open by Author "Grammatikos, Sotirios"

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    • 3D printed thermoelectric polyurethane/multiwalled carbon nanotube nanocomposites: A novel approach towards the fabrication of flexible and stretchable organic thermoelectrics 

      Tzounis, Lazaros; Petousis, Markos; Grammatikos, Sotirios; Vidakis, Nectarios (Peer reviewed; Journal article, 2020)
      Three-dimensional (3D) printing of thermoelectric polymer nanocomposites is reported for the first time employing flexible, stretchable and electrically conductive 3D printable thermoplastic polyurethane (TPU)/multiwalled ...
    • Comparative Life Cycle Assessment of Cotton and Other Natural Fibers for Textile Applications 

      La Rosa, Angela Daniela; Grammatikos, Sotirios (Journal article; Peer reviewed, 2019)
      Among natural fibers, such as cotton, silk, wool, flax, hemp, etc., cotton is the one that takes up the highest percentage in the textile market. Nevertheless, there are obstacles associated with its cultivation; it is ...
    • Development of injection molding tooling 

      Mariendal, Anders Brunsberg; Elnæs, Ole Kristian (Bachelor thesis, 2021)
      Denne bacheloroppgaven omhandler utviklingen av en sprøytestøpingsform til et gjenbrukbart munnbind i medisinsk silikon som skal produseres ved hjelp av 3D-printing. I fokus av utviklingsprosessen står modularitet, dette ...
    • Development of sustainable jute geotextiles by bitumen emulsion and polyester resin: Effect of gamma radiation 

      Akhtar, Nasrin; Das, Subrata Chandra; Grammatikos, Sotirios; Saha, Joykrisna; Khan, Mubarak Ahmad (Peer reviewed; Journal article, 2020)
      Jute fibers can be an alternative solution to replace synthetic fibers for temporary sustainable geotextiles applications. To produce sustainable geotextiles, jute fabrics were treated first by bitumen emulsion (BE) and ...
    • Electromagnetic shielding for buildings using hybrid polymer composites: a life cycle assessment study. 

      La Rosa, Angela Daniela; Grammatikos, Sotirios; Ciobanu, Romeo C.; Schreiner, Cristina M. (Peer reviewed; Journal article, 2020)
      In the present paper, we investigated a sandwich composite as a potential electromagnetic interference shielding wall panel for buildings. The panel was built using a ferrite-particle modified high density polyethylene in ...
    • Fused deposition modeling-based additive manufacturing (3D printing): techniques for polymer material systems 

      Daminabo, Samuel C.; Goel, Saurav; Grammatikos, Sotirios; Nezhad, Hamed Yazdani; Thakur, Vijay Kumar (Peer reviewed; Journal article, 2020)
      While the developments of additive manufacturing (AM) techniques have been remarkable thus far, they are still significantly limited by the range of printable, functional material systems that meet the requirements of a ...
    • Interesting Remarks on the Comparison of Organomodified Nanomontmorillonites in Fibre-Cement Nanohybrids 

      Papatzani, Styliani; Grammatikos, Sotirios; Paine, Kevin (Peer reviewed; Journal article, 2020)
      This paper presents the effects of the addition of (i) the organomodified nanomontmorillonite (nMt) dispersion, nC2, produced for the scope of the FP7 project name FIBCEM and of (ii) the powder, undispersed organomodified ...
    • Investigating the effect of accelerated aging on the mechanical properties of HDPE used in Norwegian fish farms 

      Wesley, James Joseph Asirvatham (Master thesis, 2020)
      The goal of this study is to analyse the properties of High-Density Polyethylene (HDPE) used in fish farms when subjected to various environmental factors such as sunlight, rain, moisture, and humidity experienced in the ...
    • Investigation of flax fibre in cross country ski structure 

      Gavric, Zoran; Leistad, Vegard (Bachelor thesis, 2020)
      Hvordan lage bærekraftige ski? Nedbrytbar biobasert epoxy, PMMA og petroleumsbasert epoxy ble testet med linfiber for å se om dette kunne erstatte dagens glassfiberarmerte petroleumsbasert epoxy i skiproduksjon hos Madshus. ...
    • Is Hygrothermal Aging of Construction Polymer Composites a Reversible Process? 

      Grammatikos, Sotirios; Papatzani, Styliani; Evernden, Mark (Peer reviewed; Journal article, 2020)
      This paper presents the effects of wet/dry cycling loading on the moisture uptake behavior of a Fibre Reinforced Polymer (FRP) composite used in the civil engineering sector. FRP samples of various dimensions were cut from ...
    • Konseptutvikling av virusfiltrerende halvmaske til helikopterpiloter 

      Mjelde, Ulf; Klingøy, Sigrid; Josephson, Linn Cathrin (Bachelor thesis, 2021)
      Som følge av covid-19-pandemien som kom til Norge tidlig i år 2020, har flere virksomheter måttet gå til innkjøp av smitteversutstyr. Norsk Luftambulanse AS er en del av den pre-hospitale helsesektoren, og er av dem som ...
    • Materialegenskaper til plastmateriale for bruk i additiv formproduksjon - Undersøkelse av mekaniske og geometriske egenskaper til High Temp V2 resin 

      Wedding, Andreas; Hagen, Alexander Enger Wright (Bachelor thesis, 2020)
      Innledning: Oppgaven er en del av BIA-prosjektet «Rapid Tooling 4.0», hvor målet er å korte ned ledetiden og kostnaden ved additiv tilvirkning av sprøytestøpeformer. Materialet som skal benyttes må ha høy styrke og gode ...
    • Nano-enabled polymers as embedded sensing electrodes in fibre-reinforced polymer composites 

      Dahl, Morten M.; Brøndbo, Vegar S. (Bachelor thesis, 2019)
      Polyuretan ble kombinert med nanoadditivene grafitt og karbon nanorør for å skape en elektrisk ledende elastomer, som videre ble implementert i en epoxy-karbonfiber kompositt for å gjøre bruken av karbonfiber-kompositter ...
    • On the Mechanical Recycling of Decommisioned Insulation Polymer Composite Components 

      Grammatikos, Sotirios; Tsampas, Spyros; Papatzani, Styliani; Luping, Tang; Löfgren, Ingemar; Petterson, Jocke (Peer reviewed; Journal article, 2020)
      Fibre reinforced polymer composites (FRPs) are being increasingly used in aerospace and automotive applications due to their high specific mechanical properties. The construction industry has ...
    • On the use of carbon nanotubes to develop durable structural electrodes for self-sensing applications 

      Grammatikos, Sotirios; Dahl, Morten Melby; Brøndbo, Vegar Salin; La Rosa, Angela Daniela (Peer reviewed; Journal article, 2020)
      This paper reports an experimental investigation on embedded polyurethane (PUR) electrodes into a carbon fibre reinforced polymer (CFRP) composite to enable the dependable use of composites as a piezoresistive sensors, ...
    • ON THE USE OF HYPERSPECTRAL IMAGING FOR RAPID DETECTION OF STRUCTURAL DEGRADATION OF WOOD PLASTIC COMPOSITES DUE TO AGING 

      Kabir, Mohammad Shahnewaz (Master thesis, 2020)
      The immensely fast-growing wood plastic composite (WPC) sector presents a wide range of opportunity for utilizing waste wood, wood fiber and plastics. This recycled material has high potential ability to reduce the plastic ...
    • Permeable nanomontmorillonite and fibre reinforced cementitious binders 

      Papatzani, S.; Grammatikos, Sotirios; Paine, K. (Journal article; Peer reviewed, 2019)
      Clinker reduction in cementitious binders is of paramount importance today, and nanotechnology has extended permissible limits. In the present study, a reference binder consisting of 60% Portland cement, 20% limestone, 20% ...
    • Physicochemical characterisation of bio-based insulation to explain their hygrothermal behaviour 

      Romano, Abbie; Grammatikos, Sotirios; Riley, Mike; Bras, Ana (Peer reviewed; Journal article, 2020)
      The utilisation of bio-based building materials as hygric buffers has received recent research interest due to their moisture sorption and thermal behaviours which are positive for indoor comfort. Their hygrothermal ...
    • Prediction Models for Thermal Conductivity of Cement-based Composites 

      Hajmohammadian Baghban, Mohammad; Kioumarsi, Mahdi; Grammatikos, Sotirios (Journal article; Peer reviewed, 2018)
      This paper presents results from investigations on the long-term influence of concrete surface and crack orientation on ingress in cracks. Five reinforced concrete structures from Norway exposed to either de-icing salts ...
    • Pumpesump med integrert forankring 

      Josefsen, Henning; Pettersen, Liss-Anne N.; Skinlo, Marius Eilertsen (Bachelor thesis, 2019)
      Avløpspumpestasjoner brukes for å transportere avløps- og spillvann fra husholdninger, industri og annen virksomhet til avløpsrenseanlegg. Her blir avløpsvannet renset før vannet slippes tilbake til naturen. Pumpesumpen, ...

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