scholarly journals The effect of wood particle size distribution on the mechanical properties of wood–plastic composite

2019 ◽  
Vol 65 (1) ◽  
Author(s):  
Arif Delviawan ◽  
Yoichi Kojima ◽  
Hikaru Kobori ◽  
Shigehiko Suzuki ◽  
Kenji Aoki ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Freeze Drying ◽  
Milling Time ◽  
Wood Flour ◽  
Wood Plastic Composite ◽  
Wet Milling ◽  
Plastic Composite ◽  
Drying Conditions

AbstractCommercial wood flour of pine (Pinus densiflora) was used as an experimental material. It was milled with different milling times 0, 10, 20, 30, 40, 60, and 120 min to investigate the effect of their particle size distribution on the mechanical properties of the wood–plastic composite. Two kinds of drying conditions, 7 days of freeze-drying at a temperature of −45 °C and heat drying (80 °C) for 24 h were applied. Polypropylene and maleic anhydride-grafted polypropylene were used as a matrix and the compatibilizer of the wood–plastic composite compound, respectively. Particle size analysis showed that an increase in the time of ball milling decreased the wood flour size. However, an excessive milling period of time longer than 40 min corresponded to an increase in the amount of aggregation. Scanning electron microscope images showed the existence of aggregation for the wood flour with 120 min of wet milling time. As the particle size decreased, mechanical properties of wood–plastic composite increased for up to 30 min of wet milling time and then slightly decreased. This behavior might be due to aggregation. The optimum mechanical property was obtained at 30 min of wet milling time under freeze-drying conditions.

Sandwiched Wood-Plastic Composites with Flame-Retardant Skin

2010 ◽  
Vol 150-151 ◽  
pp. 358-361
Author(s):  
Wen Lei ◽  
Hong Ming Ma ◽  
Yi Xu
Keyword(s):  
Mechanical Properties ◽  
Flame Retardancy ◽  
High Density Polyethylene ◽  
Oxygen Index ◽  
Wood Flour ◽  
Wood Plastic Composite ◽  
Wood Plastic Composites ◽  
The Core ◽  
Plastic Composite ◽  
Plastic Composites

In order to improve the flame retardancy of wood-plastic composites,a new sandwiched composite is introduced in this paper with basic magnesium sulfated whisker(MOS) filled high density polyethylene(HDPE) as skin and wood flour filled HDPE as core.The oxygen index of the skin and the mechanical properties of the whole sandwiched composite are investigated. The results show that, the flame retardancy of the skin will be improved siginicantly when much MOS is used,and the skin containing 40wt% MOS has an oxygen index of 25.6%,in addition,the sandwiched composite in which both the mass contents of MOS in the skin and wood flour in the core are 40% has better mechanical properties than the traditional wood plastic composite(WPC) without any skin,and the sandwiched WPC is more fatigue-resistant.

Tensile and Impact Properties Evaluation for Enviro-Recycled Wood Plastic Composite of PP/r-WF

2011 ◽  
Vol 52-54 ◽  
pp. 2082-2087 ◽  
Author(s):  
Jeefferie Abd Razak ◽  
A.R. Toibah ◽  
M.Yaakob Yuhazri ◽  
Bin Abd Rashid Mohd Warikh ◽  
Nooririnah Binti Omar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Structural Engineering ◽  
Applied Load ◽  
Raw Materials ◽  
Wood Flour ◽  
Impact Behavior ◽  
Wood Plastic Composite ◽  
Structural Application ◽  
Plastic Composite ◽  
Environmental Friendly

The potential of recycled wood flour (r-WF) addition to the thermoplastics polypropylene (PP) matrix for the composites in structural application is evaluated. The effects of different r-WF loading to the tensile and impact mechanical structural properties are analyzed. Two types of polypropylene resin which are the virgin and the recycled resin and recycled wood flour as reinforcement materials are utilized as raw materials in the composites fabrication. Various mechanical testing was conducted in accordance to ASTM standard, to study the behavior of the composites mechanical properties to the applied load. The best compounding formulation of enviro-recycled composite was found at 60wt% of PP matrix and 40wt% of the wood flour addition for both of virgin and recycle matrix. Overall experimental results showed that, the increasing of r-WF loading had significantly increased the mechanical properties of produced composite which is suitable to be applied in the application of structural engineering, through the advantage of mechanical properties performance in tensile and impact behavior. Conclusively, this finding is hoped to lead for contribution in the development of newly advanced material that is environmental friendly for the use of structural application.

The Influence of Diatomite Types and Compatibilizer Content on Properties of Diatomite-Wood Flour/Polypropylene Composites

2013 ◽  
Vol 448-453 ◽  
pp. 1363-1368 ◽  
Author(s):  
Ming Li Liu ◽  
Guo Zhi Han ◽  
Yan Long Liu ◽  
Chun Feng Li
Keyword(s):  
Mechanical Properties ◽  
Wood Flour ◽  
Flow Property ◽  
Wood Plastic Composite ◽  
Screw Extruder ◽  
Polypropylene Composites ◽  
Plastic Composite ◽  
Single Screw Extruder ◽  
Reinforcing Material ◽  
Properties Of Composites

Based on diatomite as modifier, maleic anhydride grafted polypropylene as compatibilizer, wood flour as reinforcing material, through single screw extruder, diatomite based wood plastic composite was prepared. The results show that: compared with one-grade-diatomite (OGD) and two-grade-diatomite (TGD), mechanical properties of the composites prepared by calcined diatomite (CD) are better, tensile strength and impact strength reached 46.9MPa and 20.1MPa. With respect to the diatomite types, it is more significant for the effects of MAPP mass on the mechanical properties of composites. The amount of MAPP was controlled in 4%, the mechanical properties of composites are better. The study of rheological properties showed that, the flow property of composites produced by calcined diatomite is better; the interface of the composite components is closer and more superior processability.

scholarly journals Effect of Particle Size Distribution on Laser Powder Bed Fusion Manufacturability of Copper

2021 ◽  
Author(s):  
Massimiliano Bonesso ◽  
Pietro Rebesan ◽  
Claudio Gennari ◽  
Simone Mancin ◽  
Razvan Dima ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Physical And Mechanical Properties ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Cooling Channels ◽  
Scan Speed

AbstractOne of the major benefits of the Laser Powder Bed Fusion (LPBF) technology is the possibility of fabrication of complex geometries and features in only one-step of production. In the case of heat exchangers in particular, this is very convenient for the fabrication of conformal cooling channels which can improve the performance of the heat transfer capability. Yet, obtaining dense copper parts printed via LPBF presents two major problems: the high reflectivity of 1 μm (the wavelength of commonly used laser sources) and the high thermal conductivity of copper that limits the maximum local temperature that can be attained. This leads to the formation of porous parts.In this contribution, the influence of the particle size distribution of the powder on the physical and mechanical properties of parts produced via LPBF is studied. Three copper powders lots with different particle size distributions are used in this study. The effect on densification from two laser scan parameters (scan speed and hatching distance) and the influence of contours scans on the lateral surface roughness is reported. Subsequently, samples manufactured with the optimal process parameters are tested for thermal and mechanical properties evaluation.

Mechanical Properties of 3D-Printed Wood-Plastic Composites

2018 ◽  
Vol 777 ◽  
pp. 499-507 ◽  
Author(s):  
Ossi Martikka ◽  
Timo Kärki ◽  
Qing Ling Wu
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
3D Printing ◽  
Impact Strength ◽  
Polylactic Acid ◽  
Wood Plastic Composite ◽  
Wood Plastic Composites ◽  
Plastic Composite ◽  
Plastic Composites ◽  
3D Printed

3D printing has rapidly become popular in both industry and private use. Especially fused deposition modeling has increased its popularity due to its relatively low cost. The purpose of this study is to increase knowledge in the mechanical properties of parts made of wood-plastic composite materials by using 3D printing. The tensile properties and impact strength of two 3D-printed commercial wood-plastic composite materials are studied and compared to those made of pure polylactic acid. Relative to weight –mechanical properties and the effect of the amount of fill on the properties are also determined. The results indicate that parts made of wood-plastic composites have notably lower tensile strength and impact strength that those made of pure polylactic acid. The mechanical properties can be considered sufficient for low-stress applications, such as visualization of prototypes and models or decorative items.

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