The influence of hot-press temperature and cooling rate on thermal and physicomechanical properties of bamboo particle-polylactic acid composites

Holzforschung ◽  
2013 ◽  
Vol 67 (3) ◽  
pp. 325-331 ◽  
Author(s):  
Tung-Lin Wu ◽  
Yi-Chi Chien ◽  
Tsai-Yung Chen ◽  
Jyh-Horng Wu
Keyword(s):  
Polylactic Acid ◽  
Natural Fiber ◽  
Thermomechanical Properties ◽  
Hot Press ◽  
Press Temperature ◽  
Plastic Composite ◽  
Large Size ◽  
Reinforced Plastic ◽  
Superior Mechanical Properties ◽  
Bamboo Fibers

Abstract Extrusion and injection moldings are standard processes for fabricating natural fiber-reinforced plastic composites, but both processes are generally not suitable for production of large-size pieces and products with high loadings of lignocelluloses. In this study, a medium-density bamboo plastic composite (BPC) was completely and successfully manufactured from bamboo fibers and polylactic acid (PLA) in the ratio of 1:1 by the flat-platen pressing process. The effects of pressing and cooling parameters on the thermomechanical properties of the BPCPLA have been investigated. The BPCPLA prepared at temperatures >180°C and cooling rates >10°C min-1 exhibited superior mechanical properties and matrix crystallinity. Under these conditions, a stronger interaction between the filler and the polymer matrix occurs and the mobility of the molecular chains at the interface decreases, which leads to a higher stiffness of the composite.

scholarly journals Driving Performance of Natural Fiber Gears Made Only from Bamboo Fibers Extracted with a Machining Center

2020 ◽  
Vol 14 (2) ◽  
pp. 280-293
Author(s):  
Tetsuya Kawabata ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Hiromichi Nobe ◽  
◽  
...  
Keyword(s):  
Bending Strength ◽  
Natural Fiber ◽  
Spur Gear ◽  
Hot Press ◽  
Machining Center ◽  
Machine Element ◽  
Press Method ◽  
Bamboo Fibers ◽  
Plastic Gears ◽  
Press Molding

Plastic gears are light and can be used without any lubricant, but they have low strength and an adverse effect on the environment. Therefore, a new gear that maintains these advantages while mitigating the disadvantages has been proposed. The development of sustainable and reproducible natural materials is desired to address these environmental problems. Therefore, in this study, a method was devised to extract high-quality and precise bamboo fibers using a machining center. Then, the hot press method was used to produce a novel spur gear made from only bamboo fibers, which is a green and organic machine element with a complicated shape. The present paper describes the characteristics of the proposed bamboo fiber gears, considering experimental results, including the hot press molding conditions, and the influence of fiber length on tooth bending strength, root strain, and vibration due to meshing teeth.

Feasibility Study of Processing Natural Fiber Reinforced Plastic Composite by Injection Molding

2011 ◽  
Vol 53 (4) ◽  
pp. 229-232 ◽  
Author(s):  
A. Khalina ◽  
Aidy Ali ◽  
H. Jalaluddin ◽  
M. Z. Hasniza ◽  
W. H. W. M. Haniffah ◽  
...  
Keyword(s):  
Injection Molding ◽  
Feasibility Study ◽  
Natural Fiber ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Plastic Composite ◽  
Reinforced Plastic

Driving Performance of Natural Fiber Gears Made From Only Bamboo Fibers Extracted With a Machining Center

2018 ◽  
Author(s):  
Takayuki Yanagawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Syota Matsui ◽  
Hiromichi Nobe
Keyword(s):  
Natural Fiber ◽  
Spur Gear ◽  
Tooth Root ◽  
Hot Press ◽  
Acceleration Measurement ◽  
Machining Center ◽  
Machine Element ◽  
Press Method ◽  
Bamboo Fibers ◽  
The Relationship

The advantages of a plastic gear are that it is light and can be used without any lubricant, and its disadvantages are that its strength is low and it has large environmental impact. Therefore, the development of a new gear that maintains the advantages while negating the disadvantages has been proposed. The development of sustainable and reproducible natural materials is particularly desired to address environmental problems. Therefore, in this study, a method was devised to extract high quality and highly precise bamboo fibers using a machining center. Then, the hot press method was used to produce a spur gear, which is a machine element with a complicated shape. The present paper describes the characteristics of the bamboo fiber gears investigated through experiments. The results of tooth root strain measurement showed the relationship between rotation speed and tooth root strain. In addition, we calculated the theoretical value of tooth root strain and compared it with the experimental value. The experimental value was lower than the calculated value. The results of acceleration measurement showed that that tooth root strain is associated with acceleration.

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.

scholarly journals Recycling of Waste Fiber-Reinforced Plastic Composites: A Patent-Based Analysis

Recycling ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 72
Author(s):  
Beatrice Colombo ◽  
Paolo Gaiardelli ◽  
Stefano Dotti ◽  
Flavio Caretto ◽  
Gaetano Coletta
Keyword(s):  
Future Development ◽  
Industrial Applications ◽  
Growth Potential ◽  
Chemical Recycling ◽  
Fiber Reinforced ◽  
Mechanical Recycling ◽  
Fiber Reinforced Plastic ◽  
Technology Roadmap ◽  
Plastic Composite ◽  
Reinforced Plastic

Fiber-reinforced plastic composite materials are increasingly used in many industrial applications, leading to an increase in the amount of waste that must be treated to avoid environmental problems. Currently, the scientific literature classifies existing recycling technologies into three macro-categories: mechanical, thermal, and chemical; however, none are identified as superior to the others. Therefore, scholars and companies struggle to understand where to focus their efforts. Patent analysis, by relying on quantitative data as a precursor to new technological developments, can contribute to fully grasping current applications of each recycling technology and provide insights about their future development perspectives. Based on these premises, this paper performs a patent technology roadmap to enhance knowledge about prior, current, and future use of the main recycling technologies. The results show that recycling macro-categories have different technology maturity levels and growth potentials. Specifically, mechanical recycling is the most mature, with the lowest growth potential, while thermal and chemical recycling are in their growth stage and present remarkable future opportunities. Moreover, the analysis depicts several perspectives for future development on recycling technologies applications within different industries and underline inter- and intra-category dependencies, thus providing valuable information for practitioners and both academic and non-academic backgrounds researchers interested in the topic.

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