P9.7 – Insights into the propagation of orientation across lengthscales in cellulose nanocryztals from Rheo-PLI-SAXS
Simultaneous rheological, polarized light imaging, and small-angle X-ray scattering experiments (Rheo-PLI-SAXS) are developed [1]. We highlight how the method can be used to study the multiscale orientation [2] of hierarchical systems in simple shear with a specific case study on cellulose nanocrystals [3]. Notably, it is observed that mesoscale alignment in the flow direction does […]
P9.1 – Monitoring enzymatic desulfation of CNC surfaces using electron microscopy
Cellulose has many desirable properties, such as being renewable, biodegradable, abundant and inexpensive. The cellulose can be treated by sulfuric acid hydrolysis, during which cellulose nanocrystals (CNCs) are obtained. CNCs have a high surface to volume ratio resulting in high fraction of hydroxyl groups that can be used for functionalization in different applications. The anionic […]
P9.2 – Investigating Radical Formation in Lignin Extraction Using Protic Ionic Liquids via EPR Spectroscopy
The use of protic ionic liquids (PILs) for the extraction of lignin from biomass has emerged as a promising and sustainable alternative to conventional methods.(1) However, the underlying mechanisms governing lignin dissolution, particularly the role of radical species in structural modifications and degradation, remain poorly understood. In this study, we employ electron paramagnetic resonance (EPR) […]
P9.3 – Investigation of Pulp Fibre Properties Using Advanced SIMS and X-ray Scattering Techniques
This study aims to advance the understanding of pulp fibre properties by integrating advanced characterisation techniques, such as secondary ion mass spectrometry (SIMS) and x-ray scattering (WAXS/SAXS), with conventional fibre and paper evaluation methods. By combining traditional fibre characterisation with spatially resolved insights into the distribution of lignin, hemicellulose, and cellulose from SIMS and fibre […]
P9.4 – Analysis of Lignin, Cellulose, and Hemicellulose in Sawdust: Comparison of Different Hydrolysis and Quantification Techniques
Efficient characterization of lignocellulosic biomass is essential for its utilization in various applications. Conventional analysis involves separate processing of cellulose and hemicellulose through acid hydrolysis and acid methanolysis, respectively, followed by HPLC-RID or GC-MS analysis [1,2]. These methods require lengthy procedures, multiple sample preparation steps and complex derivatization for quantification. Lignin content is determined independently […]
P9.5 – Exploring Diffusion Ordered SpectroscopY (DOSY) for Determination of the Molecular Weight of Lignin
Lignin is the largest renewable feedstock for aromatic compounds, making its valorization an important challenge to overcome during the green transition. One of the major hurdles in valorizing lignin is its heterogeneous nature and complex structure, making the raw material characterization particularly challenging. One of the key parameters for valorization is knowing the molecular weight […]
P9.6 – Nanocellulose Composite Filaments for Ionic Strength Sensor with Ultrahigh Precision and Sensitivity
Ionic strength sensing is extremely useful in numerous fields, in particular portable and robust sensors with rapid and precise detection ability are urgently needed. This study presents a novel nanocellulose composite filament sensor with exceptional accuracy (R2 > 0.998) in detecting ionic strength using only trace amounts (20 μL) of liquid samples. The fabrication process […]
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 […]
