Exploring the Impact of Fiber Volume on the Mechanical, Thermal, and Dynamic Mechanical Properties of Enset Fiber-Reinforced Polylactic Acid Composites
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Polylactic Acid
Natural fiber
The current development situation of polyactic acid(PLA) fiber is introduced.The index of physical and functional properties of PLA fiber was mainly discussed.The results showed that PLA fiber was antibacterial ,flame retardant and easy-dyed,and PLA fiber is green environmental and biodegradable.
Polylactic Acid
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Environmentally friendly green composites were fabricated from a natural cellulosic fiber (MAO fiber) and a biodegradable starch-based resin through hot-pressing. The effects of fiber length and alkali surface treatment on mechanical properties of the green composites were investigated. Fiber lengths of 2.5, 5, 10, and 20 mm were used and fiber weight content was adjusted to 56%, to obtain short fiber composites with random orientation. Ultimate tensile strength increased with increasing the fiber length up to 10 mm and remained almost constant for further increases in fiber length. Fracture strain for the composites fabricated with fiber length of 2.5 mm showed the smallest value of approximately 2 %, which is less than that of MAO fiber. This might be attributed to the debonding at the fiber/matrix interface. Fracture strains of the green composites with fibers longer than 2.5 mm were almost constant and were comparable to the fracture strains of MAO fiber indicating that the fracture properties were controlled by the fiber. Both tensile strength and Young’s modulus values were increased by alkali surface-treatment for MAO fibers. The reason for this behavior seems that alkali treatment increases the fiber/matrix interfacial adhesion strength primarily by removing lignin.
Natural fiber
Environmentally Friendly
Cellulose fiber
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Natural bamboo fiber is a new type of plant fiber using for textile. Its natural antibacterial property has not been investigated fully. In this paper, the nature antibacterial property of natural bamboo fiber was determined with the method of dynamic test referring to GB/T 20944. 3-2008 and compared with other fibers for textile, such as jute fiber, flax fiber, ramie fiber and regenerated bamboo fiber. The bacteria used in the test were Escherichia coli．(8099), Staphylococeus auresu(ATCC 6538) and Candida albican(ATCC 10231).The relationships between the antibacterial property of natural bamboo fiber and its shape, hygroscopicity and extractives were tested to analyze the influencing factors. In the results, compared with natural cotton the bacteriostatic rates of natural bamboo fiber against the bacteria were all zero; that of jute fiber and flax fiber against ATCC10231 were 48% and 8.7%; that of ramie fiber against ATCC 6538 was as high as 90.2%; that of regenerated bamboo fiber against ATCC6538 was higher than 70%. The bacteriostatic rates of the bamboo with different shape were all zero, that of plant fibers was inversely proportional to their moisture regain and the bacteriostatic action against ATCC 10231 of natural bamboo fiber extracted was lower, however, that against 8099, and ATCC 6538 was stronger except extracted with benzene. The results show that natural bamboo fiber has no natural antibacterial property. The shape could not impact the natural antibacterial property of natural bamboo fiber but the hygroscopicity and extractives have influence on that.
Ramie
Natural fiber
Textile
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Fiber-reinforced composites are widely used in a wide range of applications due to their lightweight, low cost, environmentally friendly, and reliable properties. Natural fiber and synthetic fiber are the two main types of fiber. These two fiber groups have distinct features that require a methodical approach for material selection. The distinct properties of both fibers resulted in a wide range of strength that was computed in accordance with the desired performance of material engineers. Synthetic fibers are known to be stronger than natural fibers, however due to sustainability concerns, natural fibers are commonly used with some fiber modifications and hybridization to enhance the strength of natural fiber composites. Statistical analysis is employed in this study to determine Young's modulus of each fiber group. Hypothesis testing was used to confirm the performance of the fiber's Young's modulus. All synthetic fibers have a substantially greater Young's modulus than natural fiber based on the P-value score. Aramid had the highest score for synthetic fibers, while flax fiber had the highest score for natural fiber groups, with 424.8 GPa and 57.3 GPa, respectively. Ultimately, hybridization has the potential to overcome the limitations of both synthetic and natural fibers. This statistical approach may be used to validate the hypothesis about the properties of both fibers.
Synthetic fiber
Natural fiber
Aramid
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Natural fiber
Cellulose fiber
Thermal Stability
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Retting
Textile
Thermogravimetric analysis
Natural fiber
Tenacity (mineralogy)
Synthetic fiber
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Abstract The final properties of the composites materials are strongly dependent on the residual aspect ratio, orientation, and distribution of the fibers, which are determined by the processing conditions. Present work is a systematic study of the influence of natural fiber concentration on its damage during all the steps involved in the composite compounding. The system under study is cellulose fiber‐reinforced polypropylene. The fiber geometrical parameters—length, diameter, and aspect ratio—are measured, and their statistical distributions are assessed for different concentrations. It is found that the higher the fiber concentration, the lower the fiber damage. These results evidence a difference in behavior between the damage of flexible natural fiber and rigid ones. The results are analyzed in terms of fiber concentration regimes, fiber–fiber interaction, flexibility, and entanglements. Two competitive mechanisms of the fiber interaction are proposed for explaining the fiber damage behavior during the flow of the flexible natural fiber suspensions. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 2501–2506, 2007
Natural fiber
Compounding
Aspect ratio (aeronautics)
Polypropylene
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Natural fiber
Synthetic fiber
Fiber-reinforced composite
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Abstract Fused Filament Fabrication (FFF) is one of the common methods among the Additive Manufacturing (AM) processes. In this study, hemp fiber, a sustainable, and fast degraded material introduced and mixed with fresh Polylactic Acid (PLA) filament with 3 wt%, 7.5 wt%, and 10 wt% to improve the drawbacks of pure PLA filament and sustain its required properties. The results from the fatigue testing of pure PLA, and various hemp-fiber infused PLA indicated that increasing the wt% content of a hemp fiber infused PLA specimen at a certain point does increase the ultimate bending stress as well as the overall fatigue life of a pure PLA specimen. The 10 wt% hemp fiber specimens provided a 7.32% increase in the mean ultimate flexural strength over pure PLA. The mean of Young’s modulus also increased by 10.65% for the 10 wt% hemp fiber specimen and by 23.05% for the 7.5 wt% hemp fiber specimen over PLA. The 10 wt% hemp fiber specimens also provided a 4.05% increase in fatigue life over PLA. The 3 wt% did not provide a significant improvement in the study. These findings provide insight into the AM processes and lead to the development of environment-friendly composites in the industries.
Polylactic Acid
Flexural modulus
Fused filament fabrication
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