搜索结果: 1-15 共查到“林业工程 mechanical properties”相关记录21条 . 查询时间(0.101 秒)
Improvement of physical and mechanical properties of poplar wood via immobilization of rosin by grafting of vinyl chains
Wood polymeric rosin wood impregnation mechanical properties fluorescence microscope
2023/12/4
Rosin is renewable biomass with the potential to enhance wood properties. However, its high leaching rate restricts the durability of rosin impregnation. To immobilize rosin in wood structure, polymer...
Mechanical properties of carbon nanotubes/epoxy nanocomposites: Pre-curing, curing temperature, and cooling rate
Carbon nanotubes curing epoxy mechanical properties nanocomposites polymer nanocomposites
2023/11/30
The effects of composite fabrication, such as pre-curing, curing temperature, and cooling rate, were studied. In this work, the pre-curing was defined as heat treatment of Multi-Walled Carbon Nanotube...
Rheological and mechanical properties of cellulose/LDPE composites using sustainable and fully renewable compatibilisers
blends cellulose and other wood products compatibilization phase behavior rheology
2024/2/29
Cellulose composites with polyethylene (PE) permit to reinforce this commodity polymer, while at the same time introducing renewable content and thus minimizing the use of petroleum-based feedstocks. ...
3D Printing of Poly(propylene fumarate) Oligomers: Evaluation of Resin Viscosity, Printing Characteristics and Mechanical Properties
3D Printing Poly(propylene fumarate) Oligomers Resin Viscosity
2024/2/29
Complex three-dimensional (3D) pore geometries, useful for tissue engineering scaffolds, can be fabricated via photo-crosslinking of resorbable poly(propylene fumarate) (PPF) resins using stereolithog...
Preparation and mechanical properties of green epoxy nanocomposites with cellulose nanocrystals
PHYSICAL-PROPERTIES CURING BEHAVIOR SOYBEAN OIL EPOXIDATION NANOFIBER MODEL
2024/3/5
Epoxy resin is widely used to make composites, electronic and electric parts, adhesives, and coating materials because it has excellent thermal, electrical, and mechanical properties. Using natural ma...
Modified cellulose nanocrystals enhancement to mechanical properties and water resistance of vegetable oil-based waterborne polyurethane
biopolymers and renewable polymers polyurethane silylated cellulose nanocrystals surface modification
2024/3/8
Environmentally friendly and lightweight silylated cellulose nanocrystal (SCNCs)/waterborne polyurethane (WPU) composite films that exhibit excellent mechanical properties and water resistance were pr...
Mechanical Properties of Wooden I-beams with Plantation Timber Materials in Hokkaido III.Shear creep property
wooden I-beam bending creep shear creep creep factor
2009/11/23
Shear creep property of wooden I-beams of 235 mm depth and three flange sizes with Todomatsu (Abies sachalinensis) lumber and Karamatsu (Larix kaempferi) plywood was examined by bending creep tests wi...
Determination of relationships between density, amount of glue and mechanical properties of OSB
oriented strand board (OSB) density bending strength modulus of elasticity tensile strength perpendicular to the board surface amount of glue PMDI glues
2009/7/21
This paper deals with problems of the effect of changes in density and amount of glue on mechanical properties of OSB (oriented strand boards). Tests of mechanical properties were carried out on OSB...
Mechanical Properties of Wooden I-beams with Plantation Timber Materials in Hokkaido IV.Effect of various environmental conditions on mechanical properties
wooden I-beam mechanical property environmental condition adjustment factor
2010/3/4
Effects of various environmental conditions on mechanical properties of wooden I-beams with Todomatsu (Abies sachalinensis) lumber and Karamatsu (Larix kaempferi) plywood were investigated. Five type...
Changes of Mechanical Properties of Wood under an Unstable State by Heating or Cooling
stress relaxation unstable state temperature history amount of fluidity
2009/3/6
In this paper stress relaxation of water-swollen wood was discussed with two conditions of temperature change, i.e. 1) specimens at 20°C were heated rapidly to 30-80°C, and 2) specimens at 30-80°C wer...
Mechanical Properties of Built-up Members Composed of Sugi Planks Fastened Together with Wood Pegs I
Sugi plank built-up beam wood peg edgewise bending test
2009/3/6
Built-up beams were made of two Sugi (Cryptomeria japonica D. Don) planks fastened together with wood pegs. In this study we investigated the edgewise bending properties of Sugi planks and 2ply built-...
Mechanical Properties of Wood in an Unstable State due to Temperature Changes, and an Analysis of the Relevant Mechanism II
wood block uniform elimination lignin hemicellulose
2009/3/6
In order to prepare wood specimens for subsequent measurements of mechanical properties, we examined the selective and uniform elimination of wood constituents from a 4 mm thick cross section of hino...
The most appropriate condition for evaluation of the mechanical properties of wood in an unstable state
stress relaxation unstable state bending strength quenching
2009/3/6
To study the optimum experiment conditions for determining the mechanical properties of wood which is in an unstable state due to temperature changes, the fluidity (1-Et/E0) in stress relaxation, the...
Mechanical Properties of Wood in an Unstable State due to Temperature Changes, and an Analysis of the Relevant Mechanism I.
quenching swollen wood variations of temperature stress relaxation fluidity
2009/3/6
To study mechanical properties of wood exposed to variations of temperature, in this study the swollen wood (water-swollen wood & ethylene glycol-swollen wood) was preheated at 30-180°C and quenched t...
Mechanical Properties of Wood in an Unstable State due to Temperature Changes, and Analysis of the Relevant Mechanism V.
quenching thermal expansion thermal decomposition destabilization
2009/3/6
In order to define the effects of thermal expansion and thermal decomposition on the destabilization of quenched wood, we measured the stress relaxation of steam-treated wood and oven-dried wood under...