نتایج جستجو برای: wood flour

تعداد نتایج: 50045  

Journal: :Wood and Fiber Science 2022

In this study, mechanical and biodegradability properties of wood plastic composite were investigated. Beech (fagus orientalis) flour 40 wt% was used as a reinforcing base material, maleic anhydride coupling agents nano clay to improve the added. The polymer studied polyhydroxybutyrate (PHB) other high-density polyethylene (HDPE) .Three groups composites produced, in two each polymers alone thi...

Journal: :Applied sciences 2021

This study evaluated the mechanical and hydrophobic properties of wood plastic composites (WPC) prepared by hot molding approach incorporating five different recycled plastics poplar flour. The WPC showed excellent tensile strength (36.9 MPa) flexural (44.7 associated with good hydrophobicity, could be due to application pressing which improved amount hydroxyl groups reduced crystallinity WPC. ...

Journal: :Bioresources 2023

Accelerated weathering experiments were used to examine the durability and changes in various attributes of WPCs manufactured with same wood powder size but varying polypropylene-to-wood ratios. Results from accelerated test revealed color changes, each attribute generally declined longer times. In terms mechanical qualities, preservation strength stiffness increased increasing plastic content....

Journal: :Wear 2023

In this study we evaluated the tribological performance of polypropylene composites with wood-flour fillers obtained as a by-product from wood-processing industry, which were based on unrecycled and recycled polymer matrices. The mechanical properties polypropylene-wood wood-filler loadings 0–40 wt % determined tensile tests their friction wear behaviours studied dry reciprocating ball-on-disc ...

1996
Craig M. Clemons Nicole Stark James P. Schneider

Filled thermoplastic composites are stiffer, stronger, and more dimensionally stable than their unfilled counterparts. Such thermoplastics are usually provided to the end-user as a precompounded, pelletized feedstock. Typical reinforcing fillers are inorganic materials like talc or fiberglass, but materials derived from waste wood, such as wood flour and recycled paper fiber, are also effective...

2011
Laurent M. Matuana Nicole M. Stark Shan Jin

This study examined the effect coextruding a clear HDPE cap layer onto HDPE/wood-flour composites has on the discoloration of coextruded composites exposed to accelerated UV tests. Chroma meter, XPS, SEM, and UV vis measurements accounted for the analysis of discoloration and degree of oxidation of both uncapped (control) and coextruded composites before and after UV exposures. Two separate dis...

2012
Yao Chen Jianmin Gao Yongming Fan Mandla A. Tshabalala Nicole M. Stark

To investigate chemical and color changes of the polymeric constituents of black locust (Robinia pseudoacacia) wood during heat treatment, extractive-free wood flour was conditioned to 30% initial moisture content (MC) and heated for 24 h at 120 °C in either an oxygen or nitrogen atmosphere. The color change was measured using the CIELAB color system. Chemical changes of the wood components wer...

2011
Matti Kuokkanen Teemu Vilppo Toivo Kuokkanen Tuomas Stoor Jouko Niinimäki

Finland currently has tremendous enthusiasm to increase decentralised pellet production alongside of large-scale factories. The aim of research is to promote the development of eco-/cost-efficient Nordic wood-based pellet production by means of multidisciplinary research. Using Finnish conifer stem wood (bark-free Scotch pine sawdust and shavings) as a model raw material, the total functionalit...

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