Orlando Rojas

Visiting Professor
Visiting Professor
T107 Bioproducts and Biosystems

Members of my BiCMat group conduct multidisciplinary research with our core activities involving biobased materials at different size scales, mainly those displaying large interfacial areas such as fibers (micro/nano fibers), fiber networks, particles and colloidal systems. Some examples of materials of interest include nano/microfibrillar cellulose, cellulose nanocrystals, lignin particles, fat colloids, chitin, alginates, proteins and biopolymer assemblies. Typical efforts in our labs involve thin films, cellulose derivatives, enzymes and bio-based dispersions, emulsions, foams, gels, aerogels and others. We study the adsorption behaviors of surfactants and biopolymers at interphases and at the solid/liquid and liquid/air interfaces using techniques such as piezoelectric and surface plasmon sensing, XPS and other spectroscopic techniques, AFM, imaging, light scattering, etc.

Full researcher profile


[email protected]


Colloids, Nanotecnology, Nanofibrillar cellulose, Chemical Engineering, Cellulosic surfaces, Surface chemistry, Polymer physics, Soft matter, Nanocellulose


Best Paper Award 2015 Bioresource Technology, Netherlands

Palkinto tai huomionosoitus tuotoksesta Puunjalostustekniikan laitos Jan 2015

Nanotechnology Division Award TAPPI, USA

Palkinto tai huomionosoitus tuotoksesta Puunjalostustekniikan laitos Jan 2015

Imerys FiberLean Prize IMERYS, USA

Palkinto tai huomionosoitus tuotoksesta Puunjalostustekniikan laitos Jan 2015

Foreign Member of the Finnish Academy of Science and Letters

Palkinto tai huomionosoitus urasta Biotuotteiden ja biotekniikan laitos Jan 2017

Fellow of the American Chemical Society

Palkinto tai huomionosoitus urasta Biotuotteiden ja biotekniikan laitos Jul 2013

Divisional Service Award, American Chemical Society

Palkinto tai huomionosoitus tuotoksesta Biotuotteiden ja biotekniikan laitos Jan 2009


  • Bio-based Colloids and Materials, Vieraileva professori


Effect of Surface Modification on the Pulmonary and Systemic Toxicity of Cellulose Nanofibrils

Kukka Aimonen, Mira Hartikainen, Monireh Imani, Satu Suhonen, Gerard Vales, Carlos Moreno, Hanna Saarelainen, Kirsi Siivola, Esa Vanhala, Henrik Wolff, Orlando J. Rojas, Hannu Norppa, Julia Catalan 2022 Biomacromolecules

Machine learning as a tool to engineer microstructures: Morphological prediction of tannin-based colloids using Bayesian surrogate models

Soo Ah Jin, Tero Kämäräinen, Patrick Rinke, Orlando J. Rojas, Milica Todorovic 2022 MRS Bulletin

Surface functionalization and size modulate the formation of reactive oxygen species and genotoxic effects of cellulose nanofibrils

Kukka Aimonen, Monireh Imani, Mira Hartikainen, Satu Suhonen, Esa Vanhala, Carlos Moreno, Orlando J. Rojas, Hannu Norppa, Julia Catalán 2022 Particle and Fibre Toxicology

Simple synthesis of self-assembled nacre-like materials with 3D periodic layers from nanochitin via hydrogelation and mineralization

Junhua Xu, Liang Liu, Juan Yu, Yujun Zou, Wenhui Pei, Lili Zhang, Wenbo Ye, Long Bai, Zhiguo Wang, Yimin Fan, Qiang Yong, Orlando J. Rojas 2022 Green Chemistry

Biological activity of multicomponent bio-hydrogels loaded with tragacanth gum

Roberta Teixeira Polez, Maria Morits, Christopher Jonkergouw, Josphat Phiri, Juan José Valle-Delgado, Jukka Seppälä, Markus B. Linder, Thaddeus Maloney, Orlando Rojas Gaona, Monika Österberg 2022 International Journal of Biological Macromolecules

Upcycling agro-industrial blueberry waste into platform chemicals and structured materials for application in marine environments

Guillermo Reyes, Claudia M. Pacheco, Estefania Isaza-Ferro, Amaidy Gonzalez, Eva Pasquier, Serguei Alejandro-Martin, Luis E. Arteaga-Perez, Romina R. Carrillo, Isabel Carrillo-Varela, Regis Teixeira Mendonca, Colleen Flanigan, Orlando J. Rojas 2022 Green Chemistry

Hollow Filaments Synthesized by Dry-Jet Wet Spinning of Cellulose Nanofibrils: Structural Properties and Thermoregulation with Phase-Change Infills

Guillermo Reyes, Rubina Ajdary, Maryam R. Yazdani, Orlando J. Rojas 2022 ACS Applied Polymer Materials

Pickering emulgels reinforced with host-guest supramolecular inclusion complexes for high fidelity direct ink writing

Bo Pang, Rubina Ajdary, Markus Antonietti, Orlando Rojas, Svitlana Filonenko 2022 Materials Horizons

Highly regioselective surface acetylation of cellulose and shaped cellulose constructs in the gas-phase

Tetyana Koso, Marco Beaumont, Blaise L. Tardy, Daniel Rico del Cerro, Samuel Eyley, Wim Thielemans, Orlando J. Rojas, Ilkka Kilpeläinen, Alistair W.T. King 2022 Green Chemistry