Department of Bioproducts and Biosystems

Printing Technology

The Printing Technology group is led by Patrick Gane. The group focuses on developing printed microfluidic devices using functionalised coating pigments, binders and hydrophobic inks, printing nano and microscale patterns for analyte control and light interactive devices. Rheological properties of complex micro and nanoparticulate suspension systems forms a key competence.
CHEM_Bio_Circular economy

Our research areas:

  1. Functional printing

  2. Fluid-pore interactions

  3. Sustainable materials in circular economy

Our activities include:

  • Interaction of fluids with surfaces;
  • Development and study of functional printed devices, such as microfluidic analysis platforms;
  • Functional coatings including their use based on sustainable and biomaterials for environmental and circular economy applications.

Research Strategy:

The research group is active in developing highly porous functional coatings to meet growing technology challenges in which liquid-surface interactions drive analytical tools, diagnostics, pharmaceutical analysis and security features. Designing the rheological and particle interaction properties of complex suspensions provides the backdrop to the research strategy, additionally providing the opportunity for a multidisciplinary role within the department’s Bioproducts and biosystems research activities.

1. Highly Porous Custom Coatings:

We develop highly porous coatings utilising a functionalised calcium carbonate pigment (FCC). The coatings can be customised by using pigments with different specific surface areas and particle sizes, together with charge modifiers and binders, such as microfibrillated cellulose (MFC). Our research topics include studying the wicking speed of liquids in contact with porous coating media, and the use of custom surface treatments to generate a platform for chromatographic separation to provide material separation and reactive microfluidic analytical devices.

 

 

Functionalised pigment coatings:

The FCC pigment has a bimodal pore size distribution, which enables fast absorption by high capillarity in intra-particle pores and high permeability through inter-particle voids.

New applications:

New applications for functionalised calcium carbonate (FCC) based coatings include microfluidic devices such as paper-based reaction assays and enzymatic assays as well as medical diagnosis, environmental monitoring and laboratory research tools.

Wicking speed and chromatographic separation of components:

We have developed methods to test the wicking speed and chromatographic properties of the coated samples. For example, this video shows the separation of water and the anionic amaranth colorant on slightly cationic FCC coating in a horizontal test set-up (12x speed).

2. Functional Inkjet Printing:

We investigate inkjet printing as a method to functionalise porous materials to produce analytical platforms. Custom inks are being developed to modify localised pore surface chemistries to control flow of aqueous liquids (by selective hydrophobisation) or concentrate/separate ionic molecules (by surface charge modification). As part of the research, methodologies to evaluate the ink/substrate interaction and effect of functionalisation are also being developed.

 

Fabrication of hydrophobic patterns:

Test patterns are fabricated by printing hydrophobic inks on porous substrates with a DMP-2831 inkjet printer.

Inkjet printed reaction arrays:

The hydrophobising agent amount needed to form a waterproof barrier depends on the properties of the coatings. The effectivity of the barrier can be controlled by varying the hydrophobising agent, drop spacing and number of ink layers.

Changing the charge of the coating by inkjet printing

Inkjet printing can be used to effect the desired transfer and separation of compounds in the coatings by changing the charge of the coating regionally. For example, this video shows the concentration of anionic tartrazine colourant (yellow) from wicking aqueous solution on printed cationic polyelectrolyte regions.

3. Rheologically induced material interactions:

The ability to induce designed inter-species adsorption of particulate material within a gel suspension using controlled rheological conditions is a breakthrough technology centred on the emerging application of micro and nanocellulose in nanofunctional devices and processes. The adsorption of nanoparticles onto nanofibrils of cellulose whilst maintaining a gel-like condition is a discovery of particular significance in a wide range of applications, both in medical and analytical research, and in industry.  One such potential application is the analysis of nanoparticles in suspension using gellant microfluidic devices, including a potential solution to the challenge of dewatering nanomaterials.

Professor Patrick Gane

"We specialise in front line activities in functional applications to aid sustainability and circular economy"

Patrick Gane, Head of the research group

Related content:

Professor Patrick Gane receives the prestigious Georg-Jayme Medal

Professor Gane was awarded for his achievements in paper printing and novel pulp applications.

Professor Patrick Gane

Awards and honours for professors of the School of Chemical Engineering

Prof. Orlando Rojas, Prof. Patrick Gane and Prof. Eero Kontturi of the Department of Bioproducts and Biosystems, have been acknowledged for their significant work.

Latest publications:

Improved stabilisation of graphite nanoflake dispersions using hydrothermally-produced nanocellulose

Katarina Dimic-Misic, Jean Buffiere, Monireh Imani, Kaarlo Nieminen, Herbert Sixta, Patrick Gane 2021 Colloids and Surfaces A: Physicochemical and Engineering Aspects

Impact of bimodal particle size distribution ratio of functional calcium carbonate filler on thermal and flowability properties of polyamide 12

Fabio Ippolito, Gunter Hübner, Tim Claypole, Patrick Gane 2021 Applied Sciences (Switzerland)

Simultaneous investigation of the liquid transport and swelling performance during tablet disintegration

Mohammed Al-Sharabi, Daniel Markl, Theona Mudley, Prince Bawuah, Anssi Pekka Karttunen, Cathy Ridgway, Patrick Gane, Jarkko Ketolainen, Kai Erik Peiponen, Thomas Rades, J. Axel Zeitler 2020 International Journal of Pharmaceutics

Unveiling a Recycling-Sourced Mineral-Biocellulose Fibre Composite for Use in Combustion-Generated NOx Mitigation Forming Plant Nutrient: Meeting Sustainability Development Goals in the Circular Economy

Patrick Gane, Katarina Dimic-Misic, Nemanja Bara´c, Monireh Imani, Djordje Jana´ckovi´c, Petar Uskokovi´c, Ernesto Barceló Rodriguez 2020 Applied Sciences (Switzerland)

Willow bark for sustainable energy storage systems

Mathias Andreas Hobisch, Josphat Phiri, Jinze Dou, Patrick Gane, Tapani Vuorinen, Wolfgang Bauer, Christian Prehal, Thaddeus Maloney, Stefan Spirk 2020 Materials

Coupled Effects of Fibril Width, Residual and Mechanically Liberated Lignin on the Flow, Viscoelasticity, and Dewatering of Cellulosic Nanomaterials

Monireh Imani, Katarina Dimic-Misic, Mehrnoosh Tavakoli, Orlando J. Rojas, Patrick A.C. Gane 2020 Biomacromolecules

Influence of the surface modification of calcium carbonate on polyamide 12 composites

Fabio Ippolito, Gunter Hübner, Tim Claypole, Patrick Gane 2020 Polymers

Fully inkjet-printed glucose assay fabricated on highly porous pigment coating

Eveliina Jutila, Risto Koivunen, Roger Bollström, Patrick Gane 2020 Microfluidics and Nanofluidics
More information on our research in the Research database.
Research database
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