Yazan Al Haj: Nanocellulose-Derived Hydrogels and Aerogels: Advanced Applications in Sustainable Technologies

Content of the thesis: 

As the world moves toward renewable resources, the need for eco-friendly materials has never been higher. This dissertation focuses on turning natural fibers from plants and everyday biomass into advanced materials that store energy and improve sensor technology.

Research Problem

Modern technologies like batteries, supercapacitors, and sensors often rely on synthetic materials such as plastics and metals. These materials can be harmful to the environment, difficult to recycle, and take a lot of energy to produce. This research aims to create sustainable alternatives that are both effective and environmentally friendly.

Key Results and Applications The study developed new materials from cellulose, a natural fiber found in plants and bacteria. These materials were turned into hydrogels and aerogels, which showed great potential for use in energy storage and sensors. The materials can store large amounts of energy, making them ideal for supercapacitors, which are used in technologies like electric vehicles. They can also be used in pressure sensors and sound-absorbing devices, offering promise for wearable technology and noise control systems.

Impact on the Field

This research contributes to the growing field of sustainable materials. By using natural and biodegradable fibers, the study paves the way for greener technologies that improve performance in energy storage and sensors while reducing environmental impact. The findings build on existing studies in renewable materials and energy storage, offering solutions that can be applied across industries aiming for sustainability.

Opponent: Professor Jose M. Moran-Mirabal, McMaster University, Canada

Supervisor: Professor Jaana Vapaavuori, Aalto University, Finland

Link to electronic thesis: LINK

Link to the remote defence: LINK