9.Keynote – Solution-state NMR analysis of crystalline cellulosics
Solution-state NMR, requiring close to isotropic mobility in solution, has traditionally been challanging for technical celluloses and often chemically modified cellulosics. While chemically modified cellulosics are often soluble in molecular solvents, those materials that include blocks of unmodified chains are typically not mobile enough in solution to afford sufficient relaxation times to allow for rapid […]
9.Invited – Supramolecular structure of isolated cellulose I according to CP/MAS 13C-NMR
Supercapacitors employing electrochemical double layer capacitance (EDLC) for charge storage require electrode materials with high specific surface areas and narrow, nanoscale pore size distributions.[1,2] Activated carbons, which are cost-effective to produce and have the necessary surface area and pore geometries, are often used for this purpose.[2] Abundant biopolymers such as cellulose are interesting sources for […]
9.2 Machine learning-assisted near infrared spectroscopy for non-destructive monitoring of cellulose pulp extractives
Extractives are various low molar mass compounds found in plants, their main role is to protect against oxidation, microbial attack and adverse weather conditions. Some types of extractives can be a source of process and quality issues followed by financial losses in the pulp and paper industry. Ideally, the extractive content in the pulps should […]
9.3 Innovative Method for Assessing Penetration Depth of Wood Protective Resins in Spruce Veneer via Infrared Microscopy
Wood requires protection against environmental and biological degradation, therefore, to prolong its service life, a common method is impregnation. A study was conducted, in which acryl urethan modified alkyd impregnation was carried out on spruce veneer. Standard characterization by weight percent gain does not give any indications of the distribution in the wooden structure. The […]
9.1 Deciphering Lignin Architecture: A Fluorescent Imaging Study Enabling Quantitative And Qualitative Spatial Chemotyping
Lignins display spatial and compositional changes at the nm-level between cell wall layers and cell types. These spatial modifications of lignins are essential to support the different functions of lignified tissues such as the reversible deformation of cells, their impermeable intercellular cohesion or their structural mechanical reinforcement (Pesquet et al., 2025). To date, lignins are […]
9.5 Advancements in 31 P NMR spectroscopy for lignin analyses: a new protocol for quantifying carbonyl groups
The content of carbonyl groups in a lignin sample is given by the sum of aldehydric, ketonic, and quinonoid groups. This data is fundamental for both technical and analytical-grade lignins. On the one hand, it is of crucial relevance for technical lignins when planning upgrade processes involving its hydrophobicity, self-assembly behaviour, and tendency to (de)polymerise. […]
9.4 Three-dimensional nanoscale reconstruction of fibril organization in plant cell walls
Native composite materials such as wood, exhibit complex fiber arrangements to enhance strength, flexibility, and functionality. This work presents a new method enabling three-dimensional (3D) characterization of crystalline fibril organization at the nanoscale using Scanning Electron Diffraction (SED), enabling analysis of beam-sensitive materials.SED utilizes a nanoscale electron beam, rapidly scanning the specimen while synchronously capturing […]
Tomas Larsson
A summary of some solid state NMR (CP/MAS 13C-NMR) techniques useful for studying isolated cellulose will be discussed and, structural models used for interpreting results will be illustrated by examples. The strong connection between NMR spectra and the supramolecular structure of cellulose will be exemplified and compared with results obtained from similar samples by x-ray […]
Alistair King
Thomas Rosenau
