Department of Bioproducts and Biosystems

Biobased Materials Technology

The biobased materials technology group (BIOMAT) led by Prof. Thaddeus Maloney carries out research related to the development of next generation fiber products. Our target is to develop material-based technologies which enable the renewal of the paper and board industries.
CHEM_bio_Nanocellulose printing paper

Our research areas:

  1. Pulp fiber structure and modification

  2. Carbon materials and energy storage

  3. Nanocellulose films

The BIOMAT team leverages the inherent possibilities of cellulosic fibers as building blocks for new sustainable products. Production of nanocellulose films, pulp dissolution, and porous carbon materials are current themes. We specialize in pore structure measurements and cellulose/water interactions.

Research themes:

1. Nanomaterial applications:

The BIOMAT team is developing nanomaterial applications for various fiber products. Especially, we are focused on technologies which have potentially large scale applications at an attractive cost structure.


NFC/MFC and nanopapers production

"Nanopapers" refers to paper grades where nanocellulose is a major structural component. Nanopapers have very different, and often superior properties than traditional grades of paper. We are working on nanocellulose production, suspension processing and nanopaper forming and dewatering issues.

Spray, roll, and airlaid forming methods

All-carbon films

We are developing graphene/nanocellulose composites and all-carbon films for various electrical applications.

2. Porous cellulosic materials:

The BIOMAT team is working on porous cellulosic materials. Lignocellulosic fibers and assemblies of nanocelluloses and other forms of cellulose have a fascinating pore structure that can be exploited in a number of product applications. This includes; liquid and gas phase absorbents, hygienic products and phase change composites for construction applications. In the world of porous materials, lignocellulosics are today very under represented. This work includes the development of cutting-edge techniques for measuring fiber, nanofiber and cellulose composite pore structure. We are also working on ways to modulate and stabilize the porosity of cellulosic materials and composites.


Porous nanopapers

In this area of research we are developing methods for producing high surface area and highly porous papers from nanocellulose-based furnishes.

Novel thermoporosimetry techniques

New approaches to thermoporosimetry are being developed including techniques based on unusual transformations of salts and solvents in confined geometries.

Image: Kaniz Moriam

3. Dissolution of pulp fibers:



Assessment and enhancement of pulp reactivity

This study investigates the behavior of pulp under direct dissolution. Pulp reactivity is indirectly assessed monitoring the rheological behavior of pulp suspensions while the fibers are dissolving. The goal is to provide a deeper understanding of which pulp features affect pulp reactivity and to use this knowledge to develop different activation treatments.

Pulp reactivity
CHEM_Bio_BioBased Material Technology Lab


Academic and Industrial Collaborations:

We have a multidisciplinary international team that works closely with industrial partners on topics that support the renewal of the forest products industry. Our work is dedicated to advancement of sustainable raw materials and products in areas where our partners see possibilities for value creation.

New collaborations with:

  • Coimbra University
  • UBI University (Portugal)
  • Karlstad University


New projects with:

  • Stora Enso
  • UPM Kymmene
  • Navigator Company

Recent graduates:



CHEM_Bio_Group photo Biobased Material Technology

Latest publications:

Fast dewatering of high nanocellulose content papers with in-situ generated cationic micro-nano bubbles

Hamidreza Ahadian, Elaheh Sharifi Zamani, Josphat Phiri, Thaddeus Maloney 2021 Drying Technology

Sound absorption properties of wood-based pulp fibre foams

Jose Cucharero Moya, Sara Ceccherini, Thaddeus Maloney, Tapio Lokki, Tuomas Hänninen 2021 Cellulose

Bio-based materials for nonwovens

A.S. Santos, P. J.T. Ferreira, T. Maloney 2021 Cellulose

Extraction of thickness and water content gradients in hydrogel-based, water-backed corneal phantoms via submillimeter wave reflectometry

Aleksi Tamminen, Mariangela Baggio, Irina Nefedova, Qiushuo Sun, Semyon Presnyakov, Juha Ala-laurinaho, Elliot Brown, Vincent Wallace, Emma Macpherson, Thaddeus Maloney, Natalia Kravchenko, Mika Salkola, Sophie Deng, Zachary Taylor 2021 IEEE Transactions on Terahertz Science and Technology

Submillimeter-Wave Permittivity Measurements of Bound Water in Collagen Hydrogels via Frequency Domain Spectroscopy

Aleksi Tamminen, Mariangela Baggio, Irina Nefedova, Qiushuo Sun, Juha Anttila, Juha Ala-Laurinaho, Elliot R. Brown, Vincent P. Wallace, Emma Pickwell-Macpherson, Thaddeus Maloney, Mika Salkola, Sophie X. Deng, Zachary D. Taylor 2021 IEEE Transactions on Terahertz Science and Technology

Activation of softwood Kraft pulp at high solids content by endoglucanase and lytic polysaccharide monooxygenase

Sara Ceccherini, Jenni Rahikainen, Kaisa Marjamaa, Daisuke Sawada, Stina Grönqvist, Thaddeus Maloney 2021 Industrial Crops and Products

The effect of pressure pulsing on the mechanical dewatering of nanofiber suspensions

Marko Korhonen, Antti Puisto, Mikko Alava, Thaddeus Maloney 2020 Chemical Engineering Science

High consistency mechano-enzymatic pretreatment for kraft fibres

Jenni Rahikainen, Outi Mattila, Thaddeus Maloney, Ville Lovikka, Kristiina Kruus, Anna Suurnäkki, Stina Grönqvist 2020 Cellulose

Effect of Compression Refining on Fiber Properties

Jari Käyhkö, Eero Hiltunen, Yrjö Hiltunen, Ekaterina Nikolskaya, Lauri Kulmala, Thaddeus Maloney 2020 BioResources

Chemical characterization and ultrastructure study of pulp fibers

K. K. Kesari, M. Leppänen, S. Ceccherini, J. Seitsonen, S. Väisänen, M. Altgen, L. S. Johansson, T. Maloney, J. Ruokolainen, T. Vuorinen 2020 Materials Today Chemistry
More information on our research in the Research database.
Research database
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