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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 …

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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 …

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Theoretical study of lignin swelling in atomistic details

In this project vi use molecular dynamics (MD) simulations to investigate hygroscopic properties of various lignins. Our hope is that structure and dynamics on the atomistic level of details will complement existing macromechanical models. The goal is to test existing atomistic models of lignin subject to its interactions with water. The output of the project …

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Molecular Basis of the Interactions and Recalcitrance of Lignocellulosic Biomass

Lignocellulosic biomass represents the main renewable resource from the biosphere for the production of biofuels, platform chemicals and bio-based materials. Lignocellulose consists of a complex polymeric network of cellulose microfibrils embedded in a matrix of hemicelluloses, pectins, and lignins with exquisite organization from the nano- to the microscale. However, the heterogeneity of the lignocellulose polymeric …

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Functional lignin nanomaterials

This is a umbrella theme of research carried out in Sustainable Materials Chemistry (SUSMATCHEM) research group in Stockholm University. We aim to make most out of lignin with minimal processing and chemical modification according to the principles of green chemistry. In addition to fundamental studies of structure and properties of lignin and lignin nanoparticles, we …

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Native cellulose’s interplay in materials and dispersions (CELLO)

This project supported by the Swedish Research Council (Vetenskapsrådet) focus on native cellulose´s interplay in materials and dispersions. The overall aim is to study and explain the intra- and intermolecular interactions of cellulose which occur during dissolution, in dispersions and in the regeneration of novel nanobiocomposite materials.

Structural characterization of cellulose and wood using electron microscopy and elecron diffraction

Cellulose is an essential constituent in the architecture of plants, where it contributes with extraordinary properties in terms of strength and stiffness. The aim of this project is to enable the development of new materials based on wood and cellulose, through the generation of new understanding regarding its structure all the way from the meso-scale …

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Low density and wet stable networks of cellulose nanofibrils with a tailored 3D shape for advanced applications

The project has the following purpose and aims: (a) Novel wet-stable, low density networks of cellulose nanofibrils (CNF) with a tailored 3D structure; (b) Tailored structures through controlled freeze-linking of the CNF followed by a formation of interpenetrated polymeric networks inside the cellulose network for controlled liquid spreading and liquid holding capacity; (c) Tailored 3D …

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Multiscale carbonized lignin nanomaterials with tailored structure for high electrochemical capacitance

The project work focuses on the development of functional nanostructured carbon material with large specific surface area and derived from sustainable materials, mainly lignin. Approaches such as electrospinning, freeze-casting as well as 3D printing can be involved. The possible applications of the carbon material can be electrodes in high-performance energy storage devices, for example, supercapacitors.

Valorization of lignocellulosic biomass for non-fossil chemicals and fuels using photolysis based on LED

Sawdust, a valuable lignocellulosic biomass, is today considered waste and burnt to generate heat. Depending on the sawing process, sawdust might be up to 50% of the timber. An energy efficient valorization of lignocellulosic waste into non-fossil chemicals and fuels minimizes the CO2 footprint and contributes to a sustainable production. A major challenge is to …

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Multiscale simulations of fibrils in suspensions and in flow

This project is part of INTERFACE – a multidisciplinary center for flow and molecular dynamics (https:–www.interface.proj.kth.se). The aim is to develop models, based on atomistic MD, for multiscale simulations of cellulose nano fibrils.

Simulation and modelling of wood-based advanced functional materials

In this project we perform multi-scale theoretical modelling of wood-based materials and devices ranging from the Molecular Dynamics and ab initio simulations on the atomistic level to the drift-diffusion device simulation on the system level to answer the fundamental questions concerning material structure, morphology, polymerization, porosity, ion diffusion, role of water, solvents and many others, …

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