A. Jaiswal: Novel Value-added Applications for Cellulose Nanomaterials

Abstract: 

We are facing the biggest global crisis of the 21st century in the form of anthropogenic climate change. Green transition has been heralded as a key climate change mitigation effort, implying transitioning away from a fossil fuel-based economy towards an ecologically sustainable one. Nature offers us an abundant, renewable, and climate-neutral resource in the form of lignocellulosic biomass. However, the available bioresources must be utilized carefully to preserve natural habitats and biodiversity. Therefore, it is critical to explore application areas for lignocellulosic biomass where low material use can yield high derived value.

This thesis investigates the applications of cellulose nanomaterials in two such fields, namely optics and electronics. The work showcases how cellulose nanomaterials can be processed into smart optical films suitable for thermal sensing and passive energy-saving windows. Furthermore, it demonstrates how high-performance, flexible, printable, and biodegradable substrates for electronic devices can be engineered from cellulose nanomaterials. The thesis also introduces novel cellulose optical fibers for moisture and water sensing, with potential in healthcare and diagnostics. Each novel application is demonstrated through prototype devices. This work paves the way towards a sustainable future where cellulose-based materials are not merely alternatives, but preferred solutions touching our daily lives.

Opponent: Professor Julien Bras, Grenoble Institute of Technology, France

Custos: Professor Martti Toivakka, Åbo Akademi University

Link to electronic thesis: LINK

Link to the remote defense: LINK

This thesis work was part of BiOptics project.

Watch a presentation by Aayush Jaiswal at IMPACT Forum 2024: