Carsten Mai
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View article: Non-twist flax fibre reinforcement of lightweight plywood
Non-twist flax fibre reinforcement of lightweight plywood Open
Using lignin-phenol-formaldehyde (LPF) impregnated flax fibres is a little-studied method for reinforcing plywood through natural materials with only a modest increase in density. The main objective of this study was to assess the effects …
View article: The Mechanical Properties of Laminated Veneer Products from Different Stands of Douglas Fir and Norway Spruce in Germany
The Mechanical Properties of Laminated Veneer Products from Different Stands of Douglas Fir and Norway Spruce in Germany Open
The relationship between silvicultural strategies, manifested in the thinning method and rotation age on sites with different water supply, and the mechanical properties of engineered wood products plywood and laminated veneer lumber has b…
View article: Single-shot temporal characterization with the transverse deflecting structure PolariX and THz streaking at FLASH
Single-shot temporal characterization with the transverse deflecting structure PolariX and THz streaking at FLASH Open
At the free electron laser FLASH at DESY pulse length measurements can be performed with e.g. THz streaking or an analysis using the PolariX TDS. Since THz streaking examines the XUV pulse directly whereas the PolariX TDS focuses on the en…
View article: Links between the quality of Douglas fir sawn timber and selected tree and site characteristics in Germany
Links between the quality of Douglas fir sawn timber and selected tree and site characteristics in Germany Open
Forest Climate Fund of the FNR 10.13039/501100010297
View article: Plywood Manufacturing Using Various Combinations of Hardwood Species
Plywood Manufacturing Using Various Combinations of Hardwood Species Open
This study evaluates the potential of various hardwood combinations in plywood production in response to increasing wood demand and a changing roundwood supply in Central Europe. Six different combinations of nine-layer plywood were produc…
View article: Impregnation of solid wood with 1-octadecanol/1-dodecanol eutectic PCM for potential building thermal energy storage applications
Impregnation of solid wood with 1-octadecanol/1-dodecanol eutectic PCM for potential building thermal energy storage applications Open
http://dx.doi.org/10.13039/501100023292 KSB Stiftung
View article: Influence of screened fibre fractions on the properties of insulation panels made of different wood species
Influence of screened fibre fractions on the properties of insulation panels made of different wood species Open
Fachagentur Nachwachsende Rohstoffe 10.13039/501100010812
View article: Basalt grid reinforcement of lightweight plywood
Basalt grid reinforcement of lightweight plywood Open
By using basalt fibre grids as a reinforcing material, lightweight plywood with improved bending properties could be produced by using low density hardwood veneers and phenol-formaldehyde (PF) adhesives. The improvement in flexural strengt…
View article: Evaluation of Four Methods to Determine the Degree of Cure of Melamine-Based Direct Pressed Laminates on Particleboards: Two Improved UV Absorption Methods, the Kiton Test, and Near Infrared Spectroscopy
Evaluation of Four Methods to Determine the Degree of Cure of Melamine-Based Direct Pressed Laminates on Particleboards: Two Improved UV Absorption Methods, the Kiton Test, and Near Infrared Spectroscopy Open
Despite its importance, the determination of the degree of cure of melamine-based laminates often relies on tests with limited accuracy and validity. Undercured surfaces may suffer insufficient resistance to scratching and heat as well as …
View article: Single fiber tensile strength of seagrasses and the development and characterization of Zostera marina-based medium density boards
Single fiber tensile strength of seagrasses and the development and characterization of Zostera marina-based medium density boards Open
This study investigates the potential of the leaves of the seagrass Zostera marina (ZM) as an alternative raw material for the production medium-density boards. In the first part, the tensile strength properties of various types of seagras…
View article: Mechanical and thermal analysis of basalt grid reinforced particleboards containing flame retardants
Mechanical and thermal analysis of basalt grid reinforced particleboards containing flame retardants Open
Flame retardants and other additives can reduce the performance of adhesives used to produce wood-based panels such as particleboards (PB). Basalt reinforcement was evaluated to compensate for the loss of bending strength to allow the pane…
View article: Geometric changes of TMP fibres due to thermo-hydrolytic disintegration of waste MDF evaluated by three fibre analysers
Geometric changes of TMP fibres due to thermo-hydrolytic disintegration of waste MDF evaluated by three fibre analysers Open
Thermo-hydrolytic disintegration of medium-density fibreboard (MDF) is a promising method for recovering fibres. This process, however, may affect the geometry and size distribution of the applied fibres initially obtained by thermomechani…
View article: Impact of aminosilane and colloidal nano-silica modification on the properties of ambient-cured geopolymer-bonded lignocellulosic composites
Impact of aminosilane and colloidal nano-silica modification on the properties of ambient-cured geopolymer-bonded lignocellulosic composites Open
This study investigates the effect of modifying ambient-cured geopolymer-bonded composites of coir fibre and wood particles with γ-aminopropyltriethoxysilane (APTES, 0.10 wt%) and colloidal nano-silica (CNS, 1.45 wt%). APTES-modified binde…
View article: Generation of a lignin-polyester coating for the corrosion protection of steel surfaces applied by atmospheric plasma spraying
Generation of a lignin-polyester coating for the corrosion protection of steel surfaces applied by atmospheric plasma spraying Open
The natural process of metal corrosion causes significant losses in a wide range of industries, requiring substantial efforts to contain its effects. An alternative approach to corrosion protection is the use of renewable organic coating m…
View article: Surface modification of basalt used for reinforcement of wood-based panels
Surface modification of basalt used for reinforcement of wood-based panels Open
Funder: \n http://dx.doi.org/10.13039/501100001866\n Fonds National de la Recherche Luxembourg
View article: Investigation of various hardwood and softwood fibres for the usage in wood-fibre insulation panels
Investigation of various hardwood and softwood fibres for the usage in wood-fibre insulation panels Open
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View article: Basalt grid reinforcement of wood-based panels
Basalt grid reinforcement of wood-based panels Open
By using basalt fibers as reinforcement materials, high performance particleboards could be produced by the wood-based panel industry. Due to the high strength of basalt fibers, the strength-to-weight ratio can be significantly increased, …
View article: Studies of radiation background at the synchrotron light source DELTA
Studies of radiation background at the synchrotron light source DELTA Open
The 1.5-GeV electron storage ring of the synchrotron radiation source DELTA at TU Dortmund University is surrounded by a 1 m thick concrete radiation shielding wall with a height varying between 3.0 and 4.3 m and with open top. The install…
View article: Basalt grid reinforcement of cement-bonded particleboards
Basalt grid reinforcement of cement-bonded particleboards Open
This study focuses on the effect of basalt fiber reinforcement of cement-bonded particleboards (CBPB) with a target density of 1200 kg m-³ in terms of the compatibility with cement and the change in mechanical properties compared to conven…
View article: Low-carbon magnesium potassium phosphate cement (MKPC) binder comprising caustic calcined magnesia and potassium hydroxide activated biochar from softwood technical lignin
Low-carbon magnesium potassium phosphate cement (MKPC) binder comprising caustic calcined magnesia and potassium hydroxide activated biochar from softwood technical lignin Open
Biochar augmentation in cementitious materials is attractive for enhancing the products' mechanical properties and improving sustainability. Softwood technical lignin biochar (5 wt-%) was used to augment MKPC as a replacement material, wit…
View article: Approaching Self-Bonded Medium Density Fiberboards Made by Mixing Steam Exploded Arundo donax L. and Wood Fibers: A Comparison with pMDI-Bonded Fiberboards on the Primary Properties of the Boards
Approaching Self-Bonded Medium Density Fiberboards Made by Mixing Steam Exploded Arundo donax L. and Wood Fibers: A Comparison with pMDI-Bonded Fiberboards on the Primary Properties of the Boards Open
This study presents an unexplored method to produce formaldehyde-free MDF. Steam exploded Arundo donax L. (STEX-AD) and untreated wood fibers (WF) were mixed at different mixing rates (0/100, 50/50, and 100/0, respectively) and two series …
View article: Production and characterisation of self-blowing lignin-based foams
Production and characterisation of self-blowing lignin-based foams Open
Self-blowing lignin-furanic foams were produced using formulations comprising Kraft lignin and furfuryl alcohol as the major components. Diethyl ether, Tween 85 and sulphuric acid were used as blowing agent, surfactant and catalyst. The in…
View article: Loofah Sandwich Panels: The Effect of Adhesive Content on Mechanical and Physical Properties
Loofah Sandwich Panels: The Effect of Adhesive Content on Mechanical and Physical Properties Open
In the development of new materials, the focus nowadays is increasingly on their relevance with regard to lightweight construction or environmental compatibility. The idea of a lightweight sandwich panel was inspired by an increasing numbe…
View article: Seagrass Leaves: An Alternative Resource for the Production of Insulation Materials
Seagrass Leaves: An Alternative Resource for the Production of Insulation Materials Open
Seagrass wracks, the remains of dead leaves accumulated on seashores, are important ecosystems and beneficial for the marine environment. Their presence on the touristic beaches, however, is a problem for the tourism industry due to the la…
View article: Vacuum Low-Temperature Microwave-Assisted Pyrolysis of Technical Lignins
Vacuum Low-Temperature Microwave-Assisted Pyrolysis of Technical Lignins Open
Cleavage by microwave-assisted pyrolysis is a way to obtain higher-value organic chemicals from technical lignins. In this report, pine kraft lignin (PKL), spruce and beech organosolv lignin (SOSL and BOSL), and calcium lignosulfonates fro…
View article: Bonding Acetylated Veneer for Engineered Wood Products—A Review
Bonding Acetylated Veneer for Engineered Wood Products—A Review Open
The purpose of this review is to put previous research findings on acetylated wood and the fabrication of veneer-based products in a common context. The first research on wood acetylation was already conducted in the 1920s using wood meal,…