Förhorning av träfibrer
Projektet går ut på att genom experimentella studier bygga upp en kunskap kring förhorning av komponenterna i träfibrer. Förhorning är ett fenomen där, i nuläget praktiskt sett irreversibla, processer i samband med torkning förändrar fibrernas svällning och flexibilitet och därmed bindningsförmåga. Bindningsförmågan till andra fibrer har stor inverkan på hur starka fibernätverk kan skapas och […]
Quantifying fire-retardant concentrations in fire-retardant treated wood
This project focuses on one of the most basic questions within the topic of fire retarded (FR) treated wood; “how we can actually measure the concentration of FR in wood specimens”, this seems like a trivial question, but is actually a significant issue, barrier to further research studies, and more wide spread usage of wood […]
Uncovering the synergistic effects between cellulose and lignin for advanced forest-based carbon fibers
Carbon fibers made completely from biobased material with a low climate impact is an area of research that have seen significant breakthroughs during the last years. Forest-based carbon fibers from certified forests have a high value and potential to stimulate new value chains in the area of light-weight composites, making it possible to use carbon […]
Water based wood treatment
For a more sustainable production of wood aerogel, treatment with the water based solvent, NaOH, can give the wood template a porous structure in sub-zero conditions. However, it is found that the porosity of the wood templates treated with NaOH (aq) can be affected at room temperature conditions as well. Towards a greener aerogel production, […]
Cellulosed based foams for water purification
We have designed foams which are built only from green components and can be prepared in up-scalable and easy manner: blending and oven-drying. Amyloid nanofibrils are used mainly as a foaming agent and cellulose nanofibrils are playing the role of the main visco-elastic stabilizer. We also use covalent cross-linking to enhance foam resistance towards capillary […]
Structure-properties relationship of covalently crosslinked cellulose networks
In this work, the structure-property relationship of covalently crosslinked cellulose networks is studied by utilizing surface modified cellulose nanofibrils and polymer links of defined structure and molecular weight. The effect of molecular weight, chemical functionality and concentration on specific surface area, swelling, and mechanical properties of the hydrogel networks will be investigated.
Bio-sourced, oven-dried and wet-stable foams based on cellulose and amyloid nanofibrils
In the recent decades, foams have been extensively used for different applications such as: packaging, thermal and acoustic insulation, energy storage, and water purification. However, fabrication of foams from renewable resources through green methods with scale-up potential is challenging. In this context, cellulose nanofibrils (CNFs) as the most abundant bio-derived nanofibrils with outstanding physical properties […]
Structure-property relationships in lignin-based porous carbon materials for water purification
Good water quality is essential to human health, social and economic development, as well as the ecosystem. Industrialization and urbanization, together with the explosive population growth, have caused a great challenge for maintaining safe and clean water resources. Among many strategic and research activities for water protection, a direct approach is to develop biobased porous […]
Defibrillation of cellulosic substrates by novel bio-based ionic liquids
New bio-based ionic liquids were developed as a greener and simple pathway for the activation of cellulosic substrates compatible with chemical modification (such as in situ polymerization). Preliminary experiments showed that these ionic liquids promote swelling/dispersing/defibrillation/partial dissolution of cellulose while retaining cellulose I crystalline structure after regeneration (full dissolution is not achieved). To get a […]
Bottom-up assembly of synthetic plant cells
Recently, isolated CNFs has been utilized as outer cell wall to assemble around micro containers (Paulraj, T. et al., Nat. Comm., 2020). In such an assembly termed as “plantosomes” or synthetic plant cell, the lipid growth was regulated by changes in the pH or ions, similar to what occurs in plant cells. This project focuses […]
Synthesis of chemicals from biomass residues for energy storage applications
The aim of my project is to create a scientific base for sustainable processes for using the waste-residue streams from pulp production more efficiently.
Upgrading recycled thermoplastics using cellulose oxalate for a more sustainable future
The absolute majority of plastic used today are fossil-based thermoplastics such as polypropylene and polyethylene. To an extent these plastics are recycled through mechanical recycling but the recycled plastic is mainly used for low-end, low quality products. This is due to decreased mechanical properties and due to that the recycled plastic often obtains a black […]
