Browsing NTNU Open by Author "Torstensen, Jonathan Økland"
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Computational study of the dissolution of cellulose into single chains: the role of the solvent and agitation
Bering, Eivind; Torstensen, Jonathan Økland; Lervik, Anders; de Wijn, Astrid S. (Journal article; Peer reviewed, 2022)We investigate the dissolution mechanism of cellulose using molecular dynamics simulations in both water and a mixture solvent consisting of water with Na+, OH− and urea. As a first computational study of its kind, we apply ... -
Fundamental properties of nanocelluloses, and teir application in membranes for CO2 Separation
Torstensen, Jonathan Økland (Doctoral theses at NTNU;2019:146, Doctoral thesis, 2019) -
Hydrophobisation of lignocellulosic materials part I: physical modification
Rodriguez Fabia, Sandra; Torstensen, Jonathan Økland; Johansson, Lars; Syverud, Kristin (Peer reviewed; Journal article, 2022)This review is the first part of a comprehensive review of hydrophobisation of lignocellulosic materials. The purpose of this review has been to compare physical hydrophobisation methods of lignocellulosic materials. We ... -
Hydrophobization of lignocellulosic materials part II: chemical modification.
Rodriguez Fabia, Sandra; Torstensen, Jonathan Økland; Johansson, Lars; Syverud, Kristin (Peer reviewed; Journal article, 2022)Lignocellulosic materials with hydrophobic properties are of great interest for developing sustainable products that can be used in various applications such as packaging, water-repellent and self-cleaning materials, oil ... -
Hydrophobization of lignocellulosic materials part III: modification with polymers
Rodriguez Fabia, Sandra; Torstensen, Jonathan Økland; Johansson, Lars; Syverud, Kristin (Journal article; Peer reviewed, 2022) -
The influence of temperature on cellulose swelling at constant water density
Torstensen, Jonathan Økland; Ottesen, Vegar; Rodríguez-Fabià, Sandra; Syverud, Kristin; Johansson, Lars; Lervik, Anders (Peer reviewed; Journal article, 2022)We have in this paper investigated how water sorbs to cellulose. We found that both cellulose nanofibril (CNF) and cellulose nanocrystal (CNC) films swell similarly, as they are both mainly composed of cellulose. CNF/CNC ... -
Nanocomposite membranes with high-charge and size-screened phosphorylated nanocellulose fibrils for CO2 separation
Helberg, Ragne M Lilleby; Torstensen, Jonathan Økland; Dai, Zhongde; Janakiram, Saravanan; Chinga-Carrasco, Gary; Gregersen, Øyvind Weiby; Syverud, Kristin; Deng, Liyuan (Peer reviewed; Journal article, 2020)In this study, cellulose nanofibrils (CNF) of high charge (H-P-CNF) and screened size (H-P-CNF-S) were fabricated by increasing the charge of phosphorylated cellulose nanofibrils (P-CNFs) during the pre-treatment step of ... -
PVA/nanocellulose nanocomposite membranes for CO2 separation from flue gas
Torstensen, Jonathan Økland; Helberg, Ragne M Lilleby; Deng, Liyuan; Gregersen, Øyvind Weiby; Syverud, Kristin (Peer reviewed; Journal article, 2019)In this paper, we explore the use of nanocelluloses as an additive to poly (vinyl alcohol) (PVA) nanocomposite membranes for CO2/N2 mixed-gas separation. Our findings are that several types of nanocellulose can be used to ...