Antimicrobial Cellulose Nanofibril Porous Materials Obtained by Supercritical Impregnation of Thymol

Resin impregnation of cellulose nanofibril films facilitated by water swelling

Flexible composite films were produced by impregnating aqueous phenol formaldehyde (PF) resin into water-swollen cellulose nanofibril (CNF) films. CNF films were prepared using a pressurized filtration method in combination with freeze drying. The freeze-dried films were swollen with water then impregnated with PF resin by soaking in aqueous resin solutions of varying concentrations. Small amou...

Elasticity of Cellulose Nanofibril Materials

Josefsson, G. 2015. Elasticity of Cellulose Nanofibril Materials. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1215. 60 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9135-2. The demand for renewable load-carrying materials is increasing with increasing environmental awareness. Alternative sources for materials manufacturing a...

Porous Materials from Cellulose Nanofibrils

Drying of Pigment-Cellulose Nanofibril Substrates

A new substrate containing cellulose nanofibrils and inorganic pigment particles has been developed for printed electronics applications. The studied composite structure contains 80% fillers and is mechanically stable and flexible. Before drying, the solids content can be as low as 20% due to the high water binding capacity of the cellulose nanofibrils. We have studied several drying methods an...

Short Cellulose Nanofibril/polyvinyl Alcohol Nanocomposite Fibers

Short cellulose nanofibrils (SCNF) were investigated as a reinforcement for polyvinyl alcohol (PVA) fibers. SCNF fibers were mechanically isolated from hard wood pulp after enzymatic pretreatment. Various levels of SCNF were added to PVA and gel-spun into continuous fibers. The molecular orientation of PVA was affected by a combination of wet drawing during gel spinning and post-hot-drawing at ...