A5059960005- Wood Treatment and Properties
- Material Properties and Processing
- Lignin and Wood Chemistry
- Cultural Heritage Materials Analysis
- Industrial Vision Systems and Defect Detection
- Enzyme-mediated dye degradation
- Natural Fiber Reinforced Composites
- Bamboo properties and applications
- Plant Surface Properties and Treatments
- Tree Root and Stability Studies
- Polymer Nanocomposites and Properties
- Integrated Circuits and Semiconductor Failure Analysis
- Wood and Agarwood Research
- Adhesion, Friction, and Surface Interactions
- Tribology and Wear Analysis
- Lubricants and Their Additives
- Biofuel production and bioconversion
- Melamine detection and toxicity
- Marine Biology and Environmental Chemistry
- Surface Roughness and Optical Measurements
- Forest Insect Ecology and Management
- Building materials and conservation
University of Göttingen
2011-2022
Wood modification improves the properties of wood as a building material by altering structure on cellular level. This study investigated how dimensional changes macroscopic scale are related to level chemical micron after impregnation with melamine formaldehyde (MF) resin under different heat curing conditions. Our results showed that conditions affected polycondensation reactions and morphological MF within cell lumen. The diffusion into wall was estimated based triazine ring vibration in...
Scots pine (Pinus sylvestris L.) sapwood was impregnated with aqueous solutions of phenol formaldehyde and methylated melamine resins subsequently cured in an oven. One set specimens plastic bags to avoid drying (wet curing) while another samples heated water allowed freely evaporate (dry curing). Macroscopic resin distribution investigated using X-ray densitometry infrared spectroscopy (FTIR-ATR). During dry curing, the migrated wood surface resulting a gradient. Wet curing resulted even...
Abstract Impregnation modification of wood with melamine formaldehyde resin reduces the adverse effects caused by moisture uptake, but underlying modes action are not fully understood. The present study showed that it is crucial to understand sorption behavior pure when interpreting resin-modified wood. Furthermore, applied heat-curing conditions had a significant effect on uptake At same loads, dry curing were more effective in causing cell wall bulking than wet conditions. This reduced...
Abstract Scots pine micro-veneers were subjected to hydrolysis with sulphuric acid or delignification acidic sodium chlorite and a combination of both treatments. The tensile strength untreated treated veneers was determined at finite span (f-strength) zero (z-strength) under dry (20°C, 65% relative humidity) water-saturated conditions. Acidic resulted in significant losses testing modes moisture conditions, the greatest reduction found for f-strength tested dry. After delignification, only...
AbstractThe objective of this study is to evaluate the effect wood and panel density on properties lightweight strand boards (SB). For purpose, we compared SBs made low-density kiri (Paulownia tomentosa), medium-density pine (Pinus sylvestris) high-density beech (Fagus sylvatica). Single-layer non-oriented were manufactured with target densities 300 400 kg m−3. Cohesion was insufficient for further testing. The larger compaction ratio resulted in a steep profile mechanical properties, namely...
This study assesses the potential of instrumented macrohardness testing for fast and convenient characterisation resin-treated wood. The effect WPG (weight per cent gain; percentage mass resin based on dry wood; high, low) curing conditions (dry, wet) hardness indentation modulus Scots pine (Pinus sylvestris L.) sapwood was investigated two thermosetting resins, phenol formaldehyde methylated melamine formaldehyde. Thickness treated specimens broadly confirmed findings earlier studies that...
This study tested the possibility of determining Brinell hardness wood by instrumented indentation without visually measuring diameter impression. Hardness beech (Fagus sylvatica) and pine (Pinus sylvestris) was determined conventionally compared with that extracted from respective depth-sensing data. The standard Oliver–Pharr analysis needs to be adapted viscoelastic behaviour using a linear fit high load portion unloading curve for determination contact stiffness. Surface profiles residual...