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
https://research.aalto.fi/...

Contact information

Phone number
+358505124227

Areas of expertise

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

Honors and awards

Best Paper Award 2015 Bioresource Technology, Netherlands

Award or honor granted for a specific work Department of Forest Products Technology Jan 2015

Nanotechnology Division Award TAPPI, USA

Award or honor granted for a specific work Department of Forest Products Technology Jan 2015

Imerys FiberLean Prize IMERYS, USA

Award or honor granted for a specific work Department of Forest Products Technology Jan 2015

Foreign Member of the Finnish Academy of Science and Letters

Award or honor granted for academic or artistic career Department of Bioproducts and Biosystems Jan 2017

Fellow of the American Chemical Society

Award or honor granted for academic or artistic career Department of Bioproducts and Biosystems Jul 2013

Divisional Service Award, American Chemical Society

Award or honor granted for a specific work Department of Bioproducts and Biosystems Jan 2009

Research groups

  • Bio-based Colloids and Materials, Visiting Professor

Publications

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

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

Bacterial nanocellulose enables auxetic supporting implants

Rubina Ajdary, Roozbeh Abidnejad, Janika Lehtonen, Jani Kuula, Eija Raussi-Lehto, Esko Kankuri, Blaise Tardy, Orlando J. Rojas 2022 Carbohydrate Polymers

Direct Ink Writing of Biocompatible Nanocellulose and Chitosan Hydrogels for Implant Mesh Matrices

Rubina Ajdary, Guillermo Reyes Torres, Jani Kuula, Eija Raussi-Lehto, Tomi S. Mikkola, Esko Kankuri, Orlando Rojas Gaona 2022 ACS Polymers Au

Biowaste-derived electrode and electrolyte materials for flexible supercapacitors

Yazan Al Haj, Seyedabolfazl Mousavihashemi, Daria Robertson, Maryam Borghei, Timo Pääkkönen, Orlando J. Rojas, Eero Kontturi, Tanja Kallio, Jaana Vapaavuori 2022 Chemical Engineering Journal

Cellulose Nanofibers as Functional Biomaterial from Pineapple Stubbles via TEMPO Oxidation and Mechanical Process

Kenly Araya-Chavarría, Ruth Rojas, Karla Ramírez-Amador, Belkis Sulbarán-Rangel, Orlando Rojas, Marianelly Esquivel-Alfaro 2022 Waste and Biomass Valorization

Nanochitin: Chemistry, Structure, Assembly, and Applications

Long Bai, Liang Liu, Marianelly Esquivel, Blaise L. Tardy, Siqi Huan, Xun Niu, Shouxin Liu, Guihua Yang, Yimin Fan, Orlando J. Rojas 2022 Chemical Reviews

High-resolution 3D printing of xanthan gum/nanocellulose bio-inks

Hossein Baniasadi, Erfan Kimiaei, Roberta Teixeira Polez, Rubina Ajdary, Orlando Rojas Gaona, Monika Österberg, Jukka Seppälä 2022 International Journal of Biological Macromolecules

Chlorotrimethylsilane treatment affords long-lasting contaminant-proof and transparent slippery covalently attached liquids surfaces

Zhixiang Chen, Yi Lu, Orlando J. Rojas, Fan Yang, Zhiqing Zhang, Qingxia Liu 2022 Applied Surface Science

Liquid-solid triboelectric nanogenerators for a wide operation window based on slippery lubricant-infused surfaces (SLIPS)

Zhixiang Chen, Yi Lu, Rui Li, Orlando J. Rojas, Rogerio Manica, Qingxia Liu 2022 Chemical Engineering Journal