CD Laboratory for Fiber Swelling and Paper Performance

The CD Laboratory for Fiber Swelling and Paper Performance has four industrial partners: Mondi, Oce, Kelheim and SIG. Research is aimed on fiber swelling and its effect on three aspects of fiber network performance. There are three key research areas. LIQUID ABSORPTION. Here the kinetics of liquid absorption on a short timescale are investigated. This is related to the ink setting during printing, which is critical in high speed inkjet. DIMENSIONAL STABILITY OF FIBER NETWORKS. the effect of liquid absorption on the dimensional stability of paper is addressed. The paper has to absorb the ink during printing, which may lead to deformations like buckling or curling of the paper. Modifications of fiber and paper to reduce deformations and improve dimensional stability are investigated. The expansion of fiber networks under load is also of interes for viscose fiber producers as hygiene products like tampons are taking up the liquid by expansion of the fiber network. FIBER NETWORK MECHANICS. Primary aim of the research is to develop a fundamental understanding of the network mechanics on a fiber leven and on the network level. Micrometchanical testing of fiber properties is carried out and used to develop constitutive material models on the fiber- and on the network level. The effect of moistioning and drying process on the mechanical behavior of the paper during printing and converting is investigated in order to better understand and improve the industrial processes. Apart from that it is the aim to work out strategies to improve the mechanical performance of paper, i.e. paper strength.

Staff

Caterina Czibula
Dipl.-Ing.
Wolfgang Johann Fischer
Dipl.-Ing. Dr.techn.
Ulrich Hirn
Univ.-Prof. Dipl.-Ing. Dr.techn.
Sarah Krainer
Dipl.-Ing. BSc
Artem Kulachenko
Prof.
Hamid Reza Motamedian
MSc.
Katrin Niegelhell
Dipl.-Ing. BSc
Claudia Payerl
Dipl.-Ing. BSc
Esther Schennach
MSc
Robert Schennach
Ao.Univ.-Prof. Mag. Dr.rer.nat.
Michael Schuller
BSc
Stefan Spirk
Assoc.Prof. Mag.rer.nat. Dr.rer.nat.
Rozalba Xhori

Publications

Journal Article
Stefan Spirk, Carina Sampl and Ulrich Hirn Multilayer Density Analysis of Cellulose Thin Films Frontiers in Chemistry 2019, 251, 2019 , DOI Show publication in PURE
Wolfgang Bauer and Ulrich Hirn A continuum micromechanics approach to the elasticity and strength of planar fiber networks European Journal of Mechanics, A/Solids 2019, 516-531, 2019 , DOI Show publication in PURE
Stefan Spirk and Mathias Hobisch Design of Friction, Morphology, Wetting, and Protein Affinity by Cellulose Blend Thin Film Composition Frontiers in Chemistry 2019, 2019 , DOI Show publication in PURE
Ulrich Hirn and Tristan Seidlhofer Transverse viscoelastic properties of pulp fibers investigated with an atomic force microscopy method Journal of Materials Science 2019, 11448–11461, 2019 , DOI Show publication in PURE
Ulrich Hirn and Tristan Seidlhofer A minimal continuum representation of a transverse isotropic viscoelastic pulp fibre based on micromechanical measurements Mechanics of Materials 2019, 149-161, 2019 , DOI Show publication in PURE
Ulrich Hirn and Tristan Seidlhofer Material model of pulp fibres Proceedings in Applied Mathematics and Mechanics 2019, 2019 , DOI Show publication in PURE
Ulrich Hirn and Jussi Antero Lahti Time-dependent mechanical response of paper during web fed high speed inkjet printing Nordic pulp & paper research journal 2019, 107-116, 2019 Show publication in PURE
Ulrich Hirn and Stefan Spirk Interaction of industrially relevant cationic starches with cellulose Carbohydrate Polymers 2018, 290-296, 2018 , DOI Show publication in PURE
Ulrich Hirn Combining adhesive contact mechanics with a viscoelastic material model to probe local material properties by AFM Soft matter 2018, 140-150, 2018 , DOI Show publication in PURE
Ulrich Hirn and Wolfgang Bauer Influence of relative humidity on the strength of hardwood and softwood pulp fibres and fibre to fibre joints Cellulose 2018, 2681-2690, 2018 , DOI Show publication in PURE
Ulrich Hirn and Sarah Krainer Short timescale wetting and penetration on porous sheets measured with ultrasound, direct absorption and contact angle RSC Advances 2018, 12861–12869, 2018 , DOI Show publication in PURE
Stefan Spirk and Rupert Kargl Nonspecific protein adsorption on cationically modified Lyocell fibers monitored by zeta potential measurements Carbohydrate Polymers 2017, 49-56, 2017 , DOI Show publication in PURE
Ulrich Hirn and Wolfgang Bauer Strength of individual hardwood fibres and fibre to fibre joints Cellulose 2016, 2049-2060, 2016 , DOI Show publication in PURE
Conference/Workshop Article
Ulrich Hirn and Tristan Seidlhofer Transverse viscoelastic properties of pulp fibers investigated by atomic force microscopyTransverse viscoelastic properties of pulp fibers investigated by atomic force microscopy60-64 Show publication in PURE
Ulrich Hirn and Jussi Antero Lahti Laboratory simulation of paper mechanical response during high-speed inkjet printingLaboratory simulation of paper mechanical response during high-speed inkjet printing Show publication in PURE
Silver Nanowires: A Versatile Tool for Conductive PaperSilver Nanowires: A Versatile Tool for Conductive Paper723-737 Show publication in PURE
Ulrich Hirn Investigating the transversal viscoelastic properties of paper fibers by atomic force microscopyInvestigating the transversal viscoelastic properties of paper fibers by atomic force microscopy74-79 Show publication in PURE
Ulrich Hirn Fiber-Fiber Bond Formation and Failure: Mechanisms and Analytical TechniquesFiber-Fiber Bond Formation and Failure: Mechanisms and Analytical Techniques839 - 863 Show publication in PURE
Ulrich Hirn and Jussi Antero Lahti LINKING PAPER STRUCTURE TO LOCAL DISTRIBUTION OF DEFORMATION AND DAMAGELINKING PAPER STRUCTURE TO LOCAL DISTRIBUTION OF DEFORMATION AND DAMAGE669-682 Show publication in PURE
Ulrich Hirn Determination of Repulpability of Talc-Filled Biopolymer Dispersion Coatings and Optimization of Repulped Reject for Improved Material Efficiency by Tailoring CoatingsDetermination of Repulpability of Talc-Filled Biopolymer Dispersion Coatings and Optimization of Repulped Reject for Improved Material Efficiency by Tailoring Coatings36-48 Show publication in PURE
Exploring Paper/AgNW based composites for photovoltaic devices by atomic force microscopy methodsExploring Paper/AgNW based composites for photovoltaic devices by atomic force microscopy methods213-216 Show publication in PURE
Ulrich Hirn and Georg Johann Urstöger Estimating the area in molecular contact using Förster resonance energy transfer microscopy (FRET)Estimating the area in molecular contact using Förster resonance energy transfer microscopy (FRET)241-244 Show publication in PURE
Ulrich Hirn and Wolfgang Bauer Influence of different realtive humidity on the strength of individual hardwood and softwood fibres and jointsInfluence of different realtive humidity on the strength of individual hardwood and softwood fibres and joints174 Show publication in PURE
Thesis
Thomas Harter Einflüsse und Ursachen für reversible und irreversible Wölbung von Kopierpapier Show publication in PURE
Tristan Seidlhofer Material Model for Anisotropic Viscoelasticity at Finite Deformations Applied to Pulp Fibres Show publication in PURE
Long and short term measurements of printed uncoated fine paper using a high speed inkjet testing setup Show publication in PURE
Untersuchung von Zweiseitigkeiten und Trocknungsspannungen auf das Wölbungsverhalten von Kopierpapieren Show publication in PURE
Ulrich Hirn Paper Structure at Different Length Scales and its Influence on Paper Properties Show publication in PURE
Sarah Krainer Evaluierung verschiedener Messmethoden und Testflüssigkeiten zur Bewertung der Druckfarbenpenetration im High Speed Inkjet – Druck Show publication in PURE
Other Article
Ulrich Hirn and Sarah Krainer Penetration into paper - industry High Speed Inkjet prints evaluation vs. measurement techniques results Show publication in PURE
Ulrich Hirn and Sarah Krainer Measuring ink spreading and penetration for HSI printing Show publication in PURE
Ulrich Hirn and Sarah Krainer Short timescale wetting and penetration on paper Show publication in PURE
Tristan Seidlhofer Material Model for Pulp Fibres and Parameter Evaluation Method Show publication in PURE
Ulrich Hirn and Sarah Krainer Wetting and penetration on paper Show publication in PURE
Ulrich Hirn and Sarah Krainer Liquid penetration into paper - Comparison of measurement technique results and real printout analysis Show publication in PURE
Ulrich Hirn Failure mechanism for pulp inter-fibre joints Show publication in PURE
Ulrich Hirn Using atomic force microscopy to investigate the transversal viscoelastic properties of paper fibers Show publication in PURE
Ulrich Hirn and Jussi Antero Lahti Linking paper structure to damage distribution and fracture initiation Show publication in PURE
Ulrich Hirn and Sarah Krainer Liquid penetraion into porous media Show publication in PURE
Ulrich Hirn and Sarah Krainer Measuring ink spreading and penetration for high speed inkjet printing Show publication in PURE
Ulrich Hirn and Wolfgang Bauer Cellulose fibers and bonds - Mechancial and morphological properties of the smallest constituents of the paper network Show publication in PURE
Ulrich Hirn AFM based dynamic mechanical analysis of viscoelastic properties of cellulose fibers Show publication in PURE
Ulrich Hirn Measurements of viscoelasticity and adhesion force of polymer materials with large radius AFM tips Show publication in PURE
Ulrich Hirn Humidity dependent mechanical properties of cellulose materials investigated by atomic force microscopy Show publication in PURE
Contact
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Ulrich Hirn