FI – TechConnect Briefs

Evaluation of the genotoxic potential of different types of nanofibrillated celluloses

Catalán J., Lindberg H.K., Aimonen K.J., Wolff H., Wedin I., Nuopponen M., Savolainen K.M., Norppa H., Finnish Institute of Occupational Health, FI

Nanofibrillar cellulose (NFC) is among the most promising innovations in the forest industry. Due to its unique properties, NFC has a wide variety of possible applica-tions. As NFC consists of thin and long fibres with [...]

Roll-to-roll application of photocatalytic TiO2 nanoparticles for printed functionality

Saarinen J.J., Valtakari D., Bollström R., Stepien M., Haapanen J., Mäkelä J.M., Toivakka M., Abo Akademi University, FI

We present here ultraviolet A (UVA) light controlled photocatalytic activity of roll-to-roll (R2R) deposited TiO2 nanoparticles on paper, board, and plastic films both for controlled wetting and oxygen sensors for modified atmosphere packages (MAPs). It [...]

High-consistency enzymatic fibrillation (HefCel) – a cost-efficient way to produce cellulose nanofibrils (CNF)

Kangas H., Pere J., Qvintus P., VTT Technical Research Centre of Finland Ltd., FI

Cellulose nanofibrils (CNF) are promising bio-based materials for numerous applications, either as replacement of oil-based materials in existing products, potentially with added functionality, or in generating completely new materials and products. The production of material [...]

Directional liquid gating by hydrophilic/hydrophobic Janus membranes

Tian X., Aalto University, FI

The ability to gate (i.e., allow or block) droplet and fluid transport in a directional manner represents an important form of liquid manipulation and has tremendous application potential in fields involving intelligent liquid management. We [...]

Hermetic room temperature glass welding technology

Lunden H., Kumpulainen T., Määttänen A., Vihinen J., Primoceler Ltd, FI

The aim of this study was to find an alternative method for conventional glass-glass bonding. The goal was to minimize heat affect, shorten process time, and avoid use of additive materials but still obtain excellent [...]

Surface Structure of the drug delivery liposome

Magarkar A., University of Helsinki, FI

The criteria for effectiveness of drug delivery liposomes (DDLs) are structural stability, site specific targeting, and lifetime in the bloodstream. Often to increase the lifetime in bloodstream DDL is coated with poly ethylene glycol (PEG). [...]

Measuring Resistive Characteristics of Silicon Nanowire by Applying Electrostatic Tensile Device and Broadband Test Signal

Roinila T., Verho J., Vilkko M., Kallio P., Lekkala J., Zeng H., Yu X., Li T., Wang Y., Tampere University of Technology, FI

Silicon nanowires have attracted significant attention by the electronics industry due to the need for ever-smaller electronics components and devices. It has been shown that nanostructures reveal mechanical and electrical properties that are significantly different [...]

Molecular modeling of the PEGylated bilayer as a model for the PEGylated liposome surface in the bloodstream

Magakrar A., University of Helsinki, FI

The criteria for effectiveness of drug delivery liposomes (DDLs) are structural stability, site specific targeting, and lifetime in the bloodstream. Often to increase the lifetime in bloodstream DDL is coated with poly ethylene glycol (PEG). [...]

Surface Characterization of Nanoparticle Coated Paperboard

Stepien M., Saarinen J.J., Teisala H., Tuominen M., Aromaa M., Kuusipalo J., Mäkelä J.M., Toivakka M., Abo Akademi University, FI

Both surface topographical and chemical composition of nanoparticle coated paperboard was characterized to explain observed differences in surface wettability. TiO2 particles induce superhydrophobicity with water contact angle (CA) of 161° whereas SiO2 particles result in [...]

Flame Deposition of Superhydrophobic and Superhydrophilic Nanoparticle Coatings on Paperboard Materials

Aromaa M., Haapanen J., Teisala H., Tuominen M., Stepien M., Saarinen J.J., Toivakka M., Kuusipalo J., Mäkelä J.M., Tampere University of Technology, FI

Liquid Flame Spray is one of the flame aerosol methods for the nanoparticle synthesis. Here, it is used in depositing the particles directly on a moving roll-to-roll substrate. The deposition process is performed in a [...]