scholarly journals Utilization Wood Fiber for Wood-Plastic Composites of High Filler Content

2010 ◽  
Vol 59 (4) ◽  
pp. 259-267 ◽  
Author(s):  
Hirokazu ITO
Keyword(s):  
Filler Content ◽  
Wood Fiber ◽  
Wood Plastic Composites ◽  
Plastic Composites

scholarly journals Rheological Properties of Wood–Plastic Composites by 3D Numerical Simulations: Different Components

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 417
Author(s):  
Xingcong Lv ◽  
Xiaolong Hao ◽  
Rongxian Ou ◽  
Tao Liu ◽  
Chuigen Guo ◽  
...  
Keyword(s):  
Flow Field ◽  
Rheological Properties ◽  
Wood Fiber ◽  
Velocity Shear ◽  
Wood Plastic Composites ◽  
Shear Rates ◽  
Plastic Composites ◽  
Power Law Fluids ◽  
Field Information ◽  
Computational Fluid Dynamics Cfd

The rheological properties of wood–plastic composites (WPCs) with different wood fiber contents were investigated using a rotational rheometer under low shear rates. The flow field information was analyzed and simulated by Ansys Polyflow software. The results showed that the WPCs with different wood fiber contents behaved as typical power-law fluids. A higher wood fiber content increased the shear thinning ability and pseudoplasticity of the WPCs. The pressure, velocity, shear rate, and viscosity distributions of the WPC during extrusion could be predicted by computational fluid dynamics (CFD) Ansys Polyflow software to explore the effects of different components on the flow field of WPCs.

scholarly journals Hot water extracted wood fiber for production of wood plastic composites (WPCs)

Holzforschung ◽  
2013 ◽  
Vol 67 (2) ◽  
pp. 193-200 ◽  
Author(s):  
Manuel Raul Pelaez-Samaniego ◽  
Vikram Yadama ◽  
Eini Lowell ◽  
Thomas E. Amidon ◽  
Timothy L. Chaffee
Keyword(s):  
Ponderosa Pine ◽  
Degradation Products ◽  
Wood Flour ◽  
Wood Fiber ◽  
Diffusion Constant ◽  
Hot Water ◽  
Thickness Swelling ◽  
Wood Plastic Composites ◽  
Hot Water Extraction ◽  
Plastic Composites

Abstract Undebarked ponderosa pine chips were treated by hot water extraction to modify the chemical composition. In the treated pine (TP), the mass was reduced by approximately 20%, and the extract was composed mainly of degradation products of hemicelluloses. Wood flour produced from TP and unextracted chips (untreated pine, UP) was blended with high-density polyethylene (HDPE) and polypropylene (PP) and was extruded into wood plastic composites (WPCs). Formulations for WPCs consisted of 58% pine, 32% plastic, and 10% other additives. WPC based on HDPE+TP and PP+TP absorbed 46–45% less water than did WPC based on HDPE+UP and PP+UP, respectively. Thickness swelling was reduced by 45–59%, respectively, after 2520 h of immersion. The diffusion constant decreased by approximately 36%. Evaluation of mechanical properties in flexure and tension mode indicated improvements in TP-WPC properties, although the data were not statistically significant in all cases. Results showed that debarking of ponderosa pine is not required for WPC production.

scholarly journals Manufacturing and Characterization of Environmentally Friendly Wood Plastic Composites Using Pinecone as a Filler into a Bio-Based High-Density Polyethylene Matrix

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4462
Author(s):  
Maria del Carmen Morcillo ◽  
Ramón Tejada ◽  
Diego Lascano ◽  
Daniel Garcia-Garcia ◽  
David Garcia-Sanoguera
Keyword(s):  
High Density Polyethylene ◽  
Filler Content ◽  
High Density ◽  
Polyethylene Matrix ◽  
Wood Plastic Composites ◽  
Matrix Interaction ◽  
Plastic Composites ◽  
Wide Range ◽  
Injection Molded

The use of wood plastic composites (WPC) is growing very rapidly in recent years, in addition, the use of plastics of renewable origin is increasingly implemented because it allows to reduce the carbon footprint. In this context, this work reports on the development of composites of bio-based high density polyethylene (BioHDPE) with different contents of pinecone (5, 10, and 30 wt.%). The blends were produced by extrusion and injection-molded processes. With the objective of improving the properties of the materials, a compatibilizer has been used, namely polyethylene grafted with maleic anhydride (PE-g-MA 2 phr). The effect of the compatibilizer in the blend with 5 wt.% has been compared with the same blend without compatibilization. Mechanical, thermal, morphological, colorimetric, and wettability properties have been analyzed for each blend. The results showed that the compatibilizer improved the filler–matrix interaction, increasing the ductile mechanical properties in terms of elongation and tensile strength. Regarding thermal properties, the compatibilizer increased thermal stability and improved the behavior of the materials against moisture. In general, the pinecone materials obtained exhibited reddish-brown colors, allowing their use as wood plastic composites with a wide range of properties depending on the filler content in the blend.

Fungal Degradation of Wood Plastic Composites Made with Thermally Modified Wood Residues

2016 ◽  
Vol 721 ◽  
pp. 8-12 ◽  
Author(s):  
Edgars Kuka ◽  
Dace Cirule ◽  
Janis Kajaks ◽  
Anna Janberga ◽  
Ingeborga Andersone ◽  
...  
Keyword(s):  
Wood Fiber ◽  
Fungal Growth ◽  
Fungal Resistance ◽  
Wood Fibers ◽  
Wood Plastic Composites ◽  
Fungal Degradation ◽  
Plastic Composites ◽  
Thermally Modified Wood ◽  
Modified Wood

Wood plastic composites (WPC) are mainly used as an outdoor material, so durability against fungal decay is one of the factors that should be analyzed and if necessary improved. WPC are susceptible to biodegradation, although these materials have limited water absorption because of the wood fiber encapsulation in polymer matrix. In the study two different water pretreatment methods (short-term and long-term) were used to ensure appropriate water content for fungal growth. Also in the paper thermally modified wood (different regimes) fiber influence on WPC fungal resistance is investigated. The results showed that long-term water pretreated WPC specimens had more suitable conditions for fungal degradation that led to higher weight loss. The results which were related to thermally modified wood fibers showed, that WPC with thermally modified wood fibers had improved resistance against fungi. Thermal modification regimes had an effect on WPC durability as well.

The Antimicrobial Effect of Different Antimicrobial Agents on Wood-Plastic Composites

2013 ◽  
Vol 377 ◽  
pp. 191-196
Author(s):  
Wang Wang Yu ◽  
Dong Xue ◽  
Bing Liu ◽  
Wen Lei ◽  
Ming Yan Wang ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Mass Loss ◽  
Antimicrobial Agents ◽  
Color Change ◽  
Wood Fiber ◽  
Antimicrobial Effect ◽  
Molding Process ◽  
Corrosion Properties ◽  
Wood Plastic Composites ◽  
Plastic Composites

Wood-plastic composites (WPC) were prepared by compression molding process using high density polyethylene and wood fiber as the main raw materials. The influence of nanozinc oxide, nanosilver antimicrobial powder and rosin amid treatment on WPC was investigated respectively by testing the mass loss, flexural strength, color change, surface tension, as well as surface images of the composites before and after the corrosion test. The results indicate that nanozinc oxide has little antimicrobial effect on WPC. While nanosilver antimicrobial powder and rosin amid both have effects on the anti-corrosion properties of WPC. It is also suggested that the WPC with the mass fraction of 6% rosin amid is the most antimicrobial, and its mass loss and flexural strength only decrease by 0.0788% and 2.24% respectively. These cost-efficient WPC can be practical to industrial application.

scholarly journals Thermal Properties of Wood-Plastic Composites with Different Compositions

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 881 ◽  
Author(s):  
Yong Guo ◽  
Shiliu Zhu ◽  
Yuxia Chen ◽  
Dagang Li
Keyword(s):  
Low Temperature ◽  
Melting Temperature ◽  
Dimensional Stability ◽  
Crystallization Temperature ◽  
Wood Fiber ◽  
Linear Thermal Expansion ◽  
Fiber Content ◽  
Wood Plastic Composites ◽  
Degradation Temperature ◽  
Plastic Composites

The thermal performance of wood–plastic composites (WPCs) with different fiber, different fiber contents, and different lubricants were investigated in this paper. The results show that the thermal degradation temperature, melting temperature, crystallization temperature, crystallinity, and viscosity of WPCs with wood fiber were slightly higher than those of WPCs with floor sanding powder and rice husk. As the wood fiber content increased, the melting temperature and crystallinity of WPCs decreased while the crystallization temperature, viscosity, and pseudoplasticity increased. When the wood fiber content was increased to 60%, the dimensional stability of WPCs tended to be constant, and a higher wood fiber content was not conducive for processing of WPCs. WPCs had a small coefficient of linear thermal expansion at low temperature and demonstrated a good dimensional stability. The presence of lubricant reduced the viscosity and increased the pseudoplasticity of the WPCs, which is advantageous for the dimensional stability of WPCs at low temperature while making it worse for high temperatures.

scholarly journals EFFECT OF NATURAL AND ACCELERATED AGING ON THE PROPERTIES OF WOOD-PLASTIC COMPOSITES

Wood Research ◽  
2021 ◽  
Vol 66 (5) ◽  
pp. 700-710
Author(s):  
LIYUAN ZHAO ◽  
BIN LV ◽  
XIAORUI PENG ◽  
YUEJIN FU
Keyword(s):  
Low Temperature ◽  
Recovery Rate ◽  
Wood Fiber ◽  
Accelerated Aging ◽  
Fiber Content ◽  
Creep Recovery ◽  
Wood Plastic Composites ◽  
Freeze Thaw ◽  
Temperature Cycles ◽  
Plastic Composites

The correspondence of natural and laboratory-accelerated aging of WPC has long beenahighly important problem discussed by many scholars. In this work, the changes in moisture content (MC), modulus of rupture (MOR), modulus of elasticity (MOE), screw holding force and creep recovery rates of two groups of wood-plastic composites (WPC) after natural and accelerated aging (high-low temperature cycles and freeze-thaw cycles) were studied to provide guidance for the use of WPC in outdoor applications. The results showed that, after the natural aging and freeze-thaw cycles treatments, MC increased significantly with both 167% of the untreated value of wood-HDPE composites with 30% wood fiber content and a thickness of 25 mm (W25), while 67% and 133% of the wood-HDPE composites with 30% wood fiber content and a thickness of 20 mm (W20), but is almost unchanged after the treatment with high-low temperature cycles. The mechanical strength, including MOR, MOE, screw holding force and creep recovery rate, decreased after natural and accelerated aging. The greatest decreases of MOR, MOE, screw holding force and creep recovery rate were 14%, 13%, 21%, and 7% for W25, while 5%, 8%, 8%, and 14% for W20 respectively. Environmental aging can reduce the strength of WPC, but the bending strength retention rate is more than 85%, showing that performance of WPC is relatively stable compared to wood materials, which is oneof thereasons for the widely use of WPC in outdoor applications.

Research on Technology of Wood-Plastic Composites

2012 ◽  
Vol 630 ◽  
pp. 75-79
Author(s):  
Hua Yong Zhang ◽  
Xiao Jian Liu ◽  
Hai Yan Sun
Keyword(s):  
Raw Materials ◽  
Wood Fiber ◽  
Thermoplastic Resin ◽  
Excellent Performance ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
Recycled Plastics

Wood-plastic composites were produced by heating, blending and extruding with recycled plastics and wood fiber as chief raw materials and some thermoplastic resin as the additive. The compounding formula and producing craft were researched and optimized. The influence of the ratio of wood fiber and additives was examined. Wood-plastics composites with excellent performance were produced.

scholarly journals Effect of Fibrillation on the Performance of Wood-Plastic Composites with High Filler Content

2010 ◽  
Vol 67 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Hirokazu Ito ◽  
Hidehiro Hattori ◽  
Tadashi Okamoto ◽  
Takashi Endo ◽  
Seung-Hwan Lee ◽  
...  
Keyword(s):  
Filler Content ◽  
Wood Plastic Composites ◽  
Plastic Composites

scholarly journals Thermal and Mechanical Behavior of Wood Plastic Composites by Addition of Graphene Nanoplatelets

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1365 ◽  
Author(s):  
Xingli Zhang ◽  
Jinglan Zhang ◽  
Ruihong Wang
Keyword(s):  
Mechanical Behavior ◽  
Mechanical Performance ◽  
Oxygen Index ◽  
Filler Content ◽  
Index Test ◽  
Performance Tests ◽  
Wood Plastic Composites ◽  
Limiting Oxygen Index ◽  
Plastic Composites ◽  
Thermal Stability Of

Wood plastic composites (WPCs) incorporating graphene nano-platelets (GNPs) were fabricated using hot-pressed technology to enhance thermal and mechanical behavior. The influences of thermal filler content and temperature on the thermal performance of the modified WPCs were investigated. The results showed that the thermal conductivity of the composites increased significantly with the increase of GNPs fillers, but decreased with the increase of temperature. Moreover, thermogravimetric analysis demonstrated that coupling GNPs resulted in better thermal stability of the WPCs. The limiting oxygen index test also showed that addition of GNPs caused good fire retardancy in WPCs. Incorporation of GNPs also led to an improvement in mechanical properties as compared to neat WPCs. Through a series of mechanical performance tests, it could be concluded that the flexural and tensile moduli of WPCs were improved with the increase of the content of fillers.

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