Papers by Eija-Katriina Uusi-Tarkka
Bioresources, Jun 7, 2024
Polymers, Jan 17, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
The purpose of this thesis is, in collaboration with the Swedish company Innventia, to explore th... more The purpose of this thesis is, in collaboration with the Swedish company Innventia, to explore the possibilities of using paper machines to create fabric-like nonwoven materials. As part of a relat ...
Polymers
All-cellulose composites (ACCs) are manufactured using only cellulose as a raw material. Biobased... more All-cellulose composites (ACCs) are manufactured using only cellulose as a raw material. Biobased materials are more sustainable alternatives to the petroleum-based composites that are used in many technical and life-science applications. In this study, an aquatic NaOH-urea solvent system was used to produce sustainable ACCs from wood-based woven textiles with and without the addition of TEMPO-oxidized nanocellulose (at 1 wt.-%). This study investigated the effects of dissolution time, temperature during hot press, and the addition of TEMPO-oxidized nanocellulose on the mechanical and thermal properties of the composites. The results showed a significant change in the tensile properties of the layered textile composite at dissolution times of 30 s and 1 min, while ACC elongation was the highest after 2 and 5 min. Changes in hot press temperature from 70 °C to 150 °C had a significant effect: with an increase in hot press temperature, the tensile strength increased and the elongation...
The purpose of this thesis was to research the use of fish leather in accessories and interior de... more The purpose of this thesis was to research the use of fish leather in accessories and interior design. The thesis was commissioned by the Union for Rural Education and Culture (Maaseudun Sivistysliitto.) The union runs a project called Poukama, where the focus is to maintain traditions, promote the local fishing culture and local design, as well as to look for new ways to revitalize and diversify trades especially in Northern Finland.
Applied Sciences
Climate change, waste disposal challenges, and emissions generated by the manufacture of non-rene... more Climate change, waste disposal challenges, and emissions generated by the manufacture of non-renewable materials are driving forces behind the production of more sustainable composite materials. All-cellulose composites (ACCs) originate from renewable biomass, such as trees and other plants, and are considered fully biodegradable. Dissolving cellulose is a common part of manufacturing ACCs, and currently there is a lot of research focused on effective, but also more environmentally friendly cellulose solvents. There are several beneficial properties of ACC materials that make them competitive: light weight, recyclability, low toxicity, good optical, mechanical, and gas barrier properties, and abundance of renewable plant-based raw material. The most prominent ACC applications are currently found in the food packing, medical, technical and vehicle industries. All-cellulose nanocomposites (ACNCs) expand the current research field and can offer a variety of more specific and functional...
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Papers by Eija-Katriina Uusi-Tarkka