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

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School of Chemical Technology | Doctoral thesis (article-based) | Defence date: 2024-10-30
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Date

2024

Department

Kemian ja materiaalitieteen laitos
Department of Chemistry and Materials Science

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Mcode

Degree programme

Language

en

Pages

90 + app. 50

Series

Aalto University publication series DOCTORAL THESES, 218/2024

Abstract

The escalating demand for sustainable technologies in response to global environmental challenges necessitates the exploration of renewable resources. This thesis investigates the transformative potential of nanocellulose, a renewable, biodegradable material, by converting it into hydrogels and aerogels for advanced technological applications. Initial studies focus on processing techniques such as cross-linking, which enhances the mechanical and chemical properties of nanocellulose, enabling the fabrication of structures optimized for modern technologies.  Subsequent experiments demonstrate that nanocellulose-derived materials substantially improve the performance of supercapacitors. By optimizing the electrode's pore structure and surface area, these materials enhance ion transport and charge retention, with a primary focus on the role of the anion. Empirical performance metrics indicate a significant increase in energy storage capacity compared to conventional materials. The same carbon material is further showcased in capacitive pressure sensors, where its inherent flexibility and sensitivity enhance real-time monitoring capabilities. A follow-up study develops hydrogel electrolytes using nanocellulose, where selecting the appropriate cation improves the mechanical properties of the electrolyte. Additionally, the unique acoustic absorption properties of nanocellulose cryogels open new avenues in noise reduction, effectively combining high performance with environmental sustainability.  In conclusion, this research underscores the potential of nanocellulose in advancing material science and contributing to environmental sustainability. The use of renewable resources highlights nanocellulose's capability in transforming energy storage, real-time monitoring, and sound insulation. Despite challenges such as scalability and integration with existing manufacturing processes, the findings pave the way for future innovations in sustainable technology.

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Supervising professor

Vapaavuori, Jaana, Asst. Prof., Aalto University, Department of Chemistry and Materials Science, Finland

Keywords

nanocellulose, hydrogels, aerogels, supercapacitors, sensors, acoustic absorbers

Other note

Parts

  • [Publication 1]: Yazan Al Haj, Ahmed B. Soliman, Jaana Vapaavuori, Mady Elbahri: Carbon Aerogels Derived from Anion-Modified Nanocellulose for Adaptive Supercapac- itor Performance, Advanced Functional Materials, 2024, 2313117, 1-9.
    Full text in Acris/Aaltodoc: https://urn.fi/URN:NBN:fi:aalto-202408286036
    DOI: 10.1002/adfm.202313117 View at publisher
  • [Publication 2]: Yazan Al Haj, Seyedabolfazl Mousavihashemi, Daria Robertson, Maryam Borghei, Timo Pääkkönen, Orlando J. Rojas, PhD, Eero Kontturi, Tanja Kallio, Jaana Vapaavuori: Biowaste-derived electrode and electrolyte materials for flexible supercapacitors, Chemical Engineering Journal, 2022, 435, 135058.
    Full text in Acris/Aaltodoc: https://urn.fi/URN:NBN:fi:aalto-202202231990
    DOI: 10.1016/j.cej.2022.135058 View at publisher
  • [Publication 3]: Fevzihan Basarir, Yazan Al Haj, Fangxin Zhou, An Nguyen, Alexander Frey, Ijlal Haider, Veikko Sariola, Jaana Vapaavuori: Edible and Biodegradable Wearable Capacitive Pressure Sensors: A Paradigm Shift Towards Sustainable Electronics with Bio-Based Materials Advanced Functional Materials, 2024, 2403268, 1-11.
    Full text in Acris/Aaltodoc: https://urn.fi/URN:NBN:fi:aalto-202408286033
    DOI: 10.1002/adfm.202403268 View at publisher
  • [Publication 4]: Isaac Benito-González, Jose Cucharero, Yazan Al Haj, Tuomas Hänninen, Tapio Lokki, Marta Martínez-Sanz, Amparo López-Rubio, Antonio Martínez- Abad, Jaana Vapaavuori: Waste Biomass Valorisation for the Development of Sustainable Cellulosic Aerogels and their Sound Absorption Properties, Ad vanced Sustainable Systems, 2022, 6, 2200248.
    Full text in Acris/Aaltodoc: https://urn.fi/URN:NBN:fi:aalto-202211306717
    DOI: 10.1002/adsu.202200248 View at publisher

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https://urn.fi/URN:ISBN:978-952-64-2075-2

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[diss] Kemian tekniikan korkeakoulu / CHEM