scholarly journals Preparation of Long Sisal Fiber-Reinforced Polylactic Acid Biocomposites with Highly Improved Mechanical Performance

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1124
Author(s):  
Zhifang Liang ◽  
Hongwu Wu ◽  
Ruipu Liu ◽  
Caiquan Wu
Keyword(s):  
Mechanical Properties ◽  
Polylactic Acid ◽  
Mechanical Performance ◽  
Tensile Elongation ◽  
Sisal Fiber ◽  
Fiber Reinforced ◽  
Impact Performance ◽  
The Matrix ◽  
Blending Process ◽  
Extension Direction

Green biodegradable plastics have come into focus as an alternative to restricted plastic products. In this paper, continuous long sisal fiber (SF)/polylactic acid (PLA) premixes were prepared by an extrusion-rolling blending process, and then unidirectional continuous long sisal fiber-reinforced PLA composites (LSFCs) were prepared by compression molding to explore the effect of long fiber on the mechanical properties of sisal fiber-reinforced composites. As a comparison, random short sisal fiber-reinforced PLA composites (SSFCs) were prepared by open milling and molding. The experimental results show that continuous long sisal fiber/PLA premixes could be successfully obtained from this pre-blending process. It was found that the presence of long sisal fibers could greatly improve the tensile strength of LSFC material along the fiber extension direction and slightly increase its tensile elongation. Continuous long fibers in LSFCs could greatly participate in supporting the load applied to the composite material. However, when comparing the mechanical properties of the two composite materials, the poor compatibility between the fiber and the matrix made fiber’s reinforcement effect not well reflected in SSFCs. Similarly, the flexural performance and impact performance of LSFCs had been improved considerably versus SSFCs.

Research on Mechanical Performance of Sisal Fiber Reinforced Concrete and its Mechanism

2010 ◽  
Vol 168-170 ◽  
pp. 925-930 ◽  
Author(s):  
Hui Ming Bao ◽  
Shang Li
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Failure Mechanism ◽  
Fracture Process ◽  
Mechanical Performance ◽  
Fiber Reinforced Concrete ◽  
Sisal Fiber ◽  
Fiber Reinforced ◽  
Cement Concrete ◽  
Bonding Property

According to experiments by comparing with normal cement concrete and other fiber reinforced concrete, they analyze the mechanical properties and features of sisal fiber reinforced concrete. Besides, they observe the fracture process of different ages and contents of sisal fiber reinforced concrete and analyze the bonding property, toughening effect and failure mechanism. The results show that sisal fiber reinforced concrete is superior to normal cement concrete on mechanical properties, and has a feature of multi-cracking, while compared with other fiber reinforced concrete, it is more economical.

scholarly journals Mechanical Properties of Sisal Fibre Reinforced Polymer Matrix Composite

2020 ◽  
Vol 22 (1) ◽  
pp. 295-300 ◽  
Author(s):  
A. Francis ◽  
S. Rajaram ◽  
A. Mohanakrishnan ◽  
B. Ashok
Keyword(s):  
Mechanical Properties ◽  
Natural Fibers ◽  
Vital Role ◽  
Fiber Reinforced Composites ◽  
Sisal Fiber ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Sisal Fibre ◽  
The Matrix ◽  
Fibre Reinforced Polymer

AbstractThe composite materials plays a vital role in increase the strength and weight reduction purpose. The natural fibers increase the additional strength to the composites. This paper is related to the mechanical properties of the sisal fiber reinforced composites and it is compared with the another preparation of sisal fiber reinforced composite. The graphs shows the comparison about the mechanical properties on the fiber reinforced composites. The strength can be improved by using some melted polypropylene to increase the bonding between the matrix and the fiber. The sample material is immersed in water for twenty four hours and at the same time the properties also measured by using various testing methods. The final comparison indicates the better process for the preparation of the composite.

Determination of the interfacial properties of carbon fiber reinforced polymers using nanoindentation

2021 ◽  
pp. 073168442110635
Author(s):  
Jing Zhu ◽  
Feng C Lang ◽  
Shi Y Wang ◽  
Zhuo Li ◽  
Yong M Xing
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Surface Topography ◽  
Mechanical Performance ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
The Matrix ◽  
Cfrp Composite ◽  
Carbon Fiber Reinforced ◽  
Continuous Stiffness Measurement

The mechanical properties of the interphase play a key role in determining the overall performance of carbon fiber reinforced polymer (CFRP) composite materials. For this reason, it is important to develop a method to easily and precisely investigate the mechanical performance of the interphase of CFRP materials. In this work, the surface topography of the CFRP material was examined using scanning probe microscopy (SPM), which revealed the polished flat sample can meet the requirements of the nanoindentation testing. The local mechanical performance of the interphase of the CFRP was determined using nanoindentation based on the continuous stiffness measurement (CSM) method. The results show that the size of the interphase between the carbon fiber and the matrix is about 1.5 μm, and the corresponding modulus and hardness values were estimated to be 5–11 and 0.4–3.3 GPa, respectively, considering the fiber-bias effects. Mapping of the local mechanical properties of a selected area revealed that nanoindentation reproduced excellently the surface topography and characterized precisely the properties of the interphase between the carbon fibers and the matrix.

Recycling of sisal fiber reinforced polypropylene and polylactic acid composites: Thermo-mechanical properties, morphology, and water absorption behavior

2019 ◽  
Vol 97 ◽  
pp. 71-81 ◽  
Author(s):  
Chakaphan Ngaowthong ◽  
Martin Borůvka ◽  
Luboš Běhálek ◽  
Petr Lenfeld ◽  
Martin Švec ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Polylactic Acid ◽  
Sisal Fiber ◽  
Fiber Reinforced

Effect of polyethylene glycol on mechanical properties of bamboo fiber‐reinforced polylactic acid composites

2019 ◽  
Vol 136 (26) ◽  
pp. 47709 ◽  
Author(s):  
Haibo Long ◽  
Zhiqiang Wu ◽  
Qianqian Dong ◽  
Yuting Shen ◽  
Wuyi Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyethylene Glycol ◽  
Polylactic Acid ◽  
Bamboo Fiber ◽  
Fiber Reinforced

Microstructure and Mechanical Performance of AZ31-1.7 Wt.% Si Alloy Processed by Cyclic Channel Die Compression

2010 ◽  
Vol 667-669 ◽  
pp. 457-461
Author(s):  
Wei Guo ◽  
Qu Dong Wang ◽  
Man Ping Liu ◽  
Tao Peng ◽  
Xin Tao Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Mechanical Performance ◽  
Chinese Script ◽  
Cast State ◽  
Microstructure And Mechanical Properties ◽  
Mean Grain Size ◽  
The Matrix ◽  
The Mean

Cyclic channel die compression (CCDC) of AZ31-1.7 wt.% Si alloy was performed up to 5 passes at 623 K in order to investigate the microstructure and mechanical properties of compressed alloys. The results show that multi-pass CCDC is very effective to refine the matrix grain and Mg2Si phases. After the alloy is processed for 5 passes, the mean grain size decreases from 300 μm of as-cast to 8 μm. Both dendritic and Chinese script type Mg2Si phases break into small polygonal pieces and distribute uniformly in the matrix. The tensile strength increases prominently from 118 MPa to 216 MPa, whereas the hardness of alloy deformed 5 passes only increase by 8.4% compared with as-cast state.

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