scholarly journals Mechanical Strength Enhancement of Polylactic Acid Hybrid Composites

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 349 ◽  
Author(s):  
Ji-Won Park ◽  
Jae-Ho Shin ◽  
Gyu-Seong Shim ◽  
Kyeng-Bo Sim ◽  
Seong-Wook Jang ◽  
...  
Keyword(s):  
Composite Material ◽  
Mechanical Strength ◽  
Polylactic Acid ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Structural Characteristics ◽  
Scanning Calorimetry ◽  
Environmental Friendliness ◽  
Research Attention

In recent years, there has been an increasing need for materials that are environmentally friendly and have functional properties. Polylactic acid (PLA) is a biomass-based polymer, which has attracted research attention as an eco-friendly material. Various studies have been conducted on functionality imparting and performance improvement to extend the field of application of PLA. Particularly, research on natural fiber-reinforced composites have been conducted to simultaneously improve their environmental friendliness and mechanical strength. Research interest in hybrid composites using two or more fillers to realize multiple functions are also increasing. Phase change materials (PCMs) absorb and emit energy through phase transition and can be used as a micro encapsulated structure. In this study, we fabricated hybrid composites using microcapsulated PCM (MPCM) and the natural fibrous filler, kenaf. We aimed to fabricate a composite material with improved endothermic characteristics, mechanical performance, and environmental friendliness. We analyzed the endothermic properties of MPCM and the structural characteristics of two fillers and finally produced an eco-friendly composite material. The PCM and kenaf contents were varied to observe changes in the performance of the hybrid composites. The endothermic properties were determined through differential scanning calorimetry, whereas changes in the physical properties of the hybrid composite were determined by measuring the mechanical properties.

Natural Aerobic Degradation of Polylactic Acid (Composites) with Natural Fiber Additives

2018 ◽  
Vol 919 ◽  
pp. 167-174 ◽  
Author(s):  
Jan Prusek ◽  
Martin Boruvka ◽  
Petr Lenfeld
Keyword(s):  
Composite Material ◽  
Polylactic Acid ◽  
Natural Fiber ◽  
Fiber Reinforcement ◽  
Degradation Process ◽  
Composite Sample ◽  
Aerobic Degradation ◽  
Different Types ◽  
Natural Degradation

This paper deals with natural degradation of PLA (polylactic acid) composites with natural fiber reinforcement in non-simulated conditions. Composite material was made of PLA and 6 different types of biodegradable fibers. Fibers made from pulp, wool, bamboo, soya, flax and hemp. All samples had 20% volume of fibers. Three of each composite sample were placed in compost (aerobic surrounding) for 72 weeks. All samples were examined at the beginning every 2 weeks to observe if the degradation process occurred and all samples were examined at the end of 72 weeks period to observe results of degradation of each composite material.

scholarly journals Mechanical and Thermal Characterization of Natural Intralaminar Hybrid Composites Based on Sisal

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 866 ◽  
Author(s):  
Alexandre L. Pereira ◽  
Mariana D. Banea ◽  
Jorge S.S. Neto ◽  
Daniel K.K. Cavalcanti
Keyword(s):  
Thermal Properties ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Thermal Characterization ◽  
Mechanical And Thermal Properties ◽  
Scanning Calorimetry ◽  
Sem Images ◽  
The Matrix ◽  
American Society ◽  
Curaua Fibers

The main objective of this work was to investigate the effect of hybridization on the mechanical and thermal properties of intralaminar natural fiber-reinforced hybrid composites based on sisal. Ramie, sisal and curauá fibers were selected as natural fiber reinforcements for the epoxy matrix based composites, which were produced by the hand lay-up technique. Tensile, flexural and impact tests were carried out according to American society for testing and materials (ASTM) standards to characterize the hybrid composites, while differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were used to evaluate the thermal properties. It was found that the mechanical properties are improved by hybridization of sisal based composites. The thermal analysis showed that the hybridization did not significantly affect the thermal stability of the composites. A scanning electron microscopy (SEM) was used to examine the fracture surface of the tested specimens. The SEM images showed a brittle fracture of the matrix and fiber breakage near the matrix.

scholarly journals Mechanical properties of biofiber/glass reinforced hybrid composites produced by hand lay-up method: A review

2021 ◽  
Vol 3 (1) ◽  
pp. 144-155
Author(s):  
Moham Ed Abdur Razzaq ◽  
◽  
Sababa Erfan Moma ◽  
Md Sanaul Rabbi ◽  
◽  
...  
Keyword(s):  
Glass Fiber ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Past Research ◽  
Fiber Composites ◽  
Partial Substitution ◽  
Static Properties ◽  
Glass Fiber Composites ◽  
Recent Developments

Hybrid composites utilize more than one kind of strands within the same matrix to urge the synergistic impact of both fibers' properties on composites' general properties. Hybridization can be performed from artificial, natural, and a combination of both fibers. The constituent filaments can be altered in numerous ways, driving to the variety in composite properties. Partial substitution of glass fiber with natural ones offers an advantage compared with glass fiber composites while permitting to obtain a mechanical performance higher than using pure natural fiber composites. Recently, researchers are tending towards the development of hybrid composites which will provide good static properties. In this context, a concise review has been done on the recent developments of natural/glass fiber-reinforced composites made by hand lay-up method. It includes a survey of the past research already available involving the hybrid composites and the effect of various parameters on composites' performance studied by various researchers.

scholarly journals A Review on Mechanical Performance of Hybrid Natural Fiber Polymer Composites for Structural Applications

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2170
Author(s):  
N. M. Nurazzi ◽  
M. R. M. Asyraf ◽  
S. Fatimah Athiyah ◽  
S. S. Shazleen ◽  
S. Ayu Rafiqah ◽  
...  
Keyword(s):  
Composite Materials ◽  
Polymer Composites ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Fiber Composite ◽  
Fiber Reinforced ◽  
Synthetic Fibers ◽  
Wide Range ◽  
Structural Applications

In the field of hybrid natural fiber polymer composites, there has been a recent surge in research and innovation for structural applications. To expand the strengths and applications of this category of materials, significant effort was put into improving their mechanical properties. Hybridization is a designed technique for fiber-reinforced composite materials that involves combining two or more fibers of different groups within a single matrix to manipulate the desired properties. They may be made from a mix of natural and synthetic fibers, synthetic and synthetic fibers, or natural fiber and carbonaceous materials. Owing to their diverse properties, hybrid natural fiber composite materials are manufactured from a variety of materials, including rubber, elastomer, metal, ceramics, glasses, and plants, which come in composite, sandwich laminate, lattice, and segmented shapes. Hybrid composites have a wide range of uses, including in aerospace interiors, naval, civil building, industrial, and sporting goods. This study intends to provide a summary of the factors that contribute to natural fiber-reinforced polymer composites’ mechanical and structural failure as well as overview the details and developments that have been achieved with the composites.

scholarly journals Nonisothermal Crystallization of Surface-Treated Alumina and Aluminum Nitride-Filled Polylactic Acid Hybrid Composites

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1077 ◽  
Author(s):  
Zelalem Lule ◽  
Jooheon Kim
Keyword(s):  
Aluminum Nitride ◽  
Polylactic Acid ◽  
Hybrid Composites ◽  
Crystallization Rate ◽  
Degree Of Crystallinity ◽  
Crystal Formation ◽  
Scanning Calorimetry ◽  
Nonisothermal Crystallization ◽  
Avrami Model ◽  
Filler Particles

This work investigates the nonisothermal crystallization and melting behavior of polylactic acid (PLA), filled with treated and untreated alumina and nano-aluminum nitride hybrid composites. Analysis by attenuated total reflectance Fourier transform infrared spectroscopy revealed that the treated fillers and the PLA matrix developed a good interaction. The crystallization and melting behaviors of the PLA hybrid composites were investigated using differential scanning calorimetry showed that the degree of crystallinity increased with the addition of hybrid fillers. Unlike the untreated PLA composites, the complete crystallization of the treated PLA hybrid composites hindered cold crystallization during the second heating cycle. The crystallization kinetics studied using the Avrami model indicated that the crystallization rate of PLA was affected by the inclusion of filler particles. X-ray diffraction analysis confirmed crystal formation with the incorporation of filler particles. The inclusion of nano-aluminum nitride (AlN) and the increase in the crystallinity led to an improvement of the storage modulus.

Effect of Silica Size on the Thermal, Mechanical and Biodegradable Properties of Polylactide/Silica Composite Material Prepared by Melt Blending

2010 ◽  
Vol 123-125 ◽  
pp. 1215-1218 ◽  
Author(s):  
Tsao Cheng Huang ◽  
Jui Ming Yeh ◽  
Jen Chang Yang
Keyword(s):  
Composite Material ◽  
Mechanical Strength ◽  
Silica Particle ◽  
Sol Gel ◽  
Average Diameter ◽  
Mechanical Analysis ◽  
Silica Particles ◽  
Scanning Calorimetry ◽  
Twin Screw ◽  
Biodegradable Properties

In this study, we attempt to investigate the effect of silica size on the thermal, mechanical and biodegradable properties of polylactide/amino-silica (PLA/SiO2) composite material, by preparing the PLA/ SiO2 hybrids containing different size of silica particle through twin-screw extruder. First of all, we prepared amino-functionalized silica particles through performing the conventional base-catalyzed sol-gel reaction of methyltrimethoxysilane (MTMS) and 3-aminopropyltrimethoxysilane (APTMS). The average diameter of silica particle employed in hybrids was 150 nm (S-silica) and 1μm (B-silica), respectively. Systematically comparative studies on the thermal properties and mechanical strength of hybrids containing two different sizes of SiO2 particles materials were carried out on a basis of studies of thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). It should be noted that the mechanical strength of hybrids containing smaller size of silica particles was found to reveal significant improvement in storage modulus as compared to its corresponding counterpart based on the DMA investigation. Moreover, the thermal stability of hybrids containing smaller size of silica particles was found to reveal slight improvement in glass transition temperature as compared to its corresponding counterpart based on the DSC investigation. Eventually, the as-prepared hybrids were found to exhibit almost similar degradation behavior to that of neat PLA.

Natural fibers woven fabric reinforced hydrogel composites for enhanced mechanical properties

2020 ◽  
pp. 152808372094448
Author(s):  
Umit Koc ◽  
Yakup Aykut ◽  
Recep Eren
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Chemical Characterization ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Wool Fabric ◽  
Rapid Preparation ◽  
Hydrogel Composites

One-step and rapid preparation of natural fiber woven fabric reinforced hydrogel composites via simultaneous dissolution and crosslinking of polyvinyl alcohol (PVA) yarns in the fabric was reported. In this regards, PVA/Cotton (C), PVA/Flax (F) and PVA/Wool (W) blended woven fabrics were prepared for the manufacturing fabric reinforced hydrogel composites. The hybrid woven fabric reinforced fabrics were treated with different concentrations of borax solutions. Aqueous borax solutions were used to alter the PVA yarns in the fabric into cross-linked structure in order to enhance mechanical performance of the hydrogel composite. Morphological investigation of hydrogel composites in a dried form was carried out by scanning electron microscopy (SEM) imaging. The chemical characterization of aqueous borax treated samples was examined by fourier-transform infrared spectroscopy (FTIR) measurements. Mechanical performances of the hydrogel composites were observed by tensile measurements. Thermogravimetric analysis (TGA) was conducted to characterize thermal stability of hydrogel composites. The results revealed that natural fiber woven fabric reinforcement significantly enhanced the mechanical strength of hydrogel composites, and wool fabric reinforced composite had better mechanical performance than its cotton and flax counterparts. Due to the low mechanical properties of hydrogels in general, the prepared fabric reinforced hydrogel composites could be used in hydrogel applications where mechanical strength is critically important.

scholarly journals Characterization of jute and glass fiber reinforced polyester based hybrid composite In this research

2016 ◽  
Vol 51 (2) ◽  
pp. 81-88
Author(s):  
MR Hassan ◽  
MA Gafur ◽  
AA Rana ◽  
MR Qadir ◽  
SM Masum ◽  
...  
Keyword(s):  
Composite Material ◽  
Flexural Strength ◽  
Glass Fiber ◽  
Hybrid Composite ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Fiber Composite ◽  
Glass Fibers ◽  
Research Work ◽  
Synthetic Fiber

In this research work an attempt is made to fabricate a hybrid composite material with hessian cloth (natural fiber) and glass fiber (synthet ic fiber) in polyester matrix using hand lay-up process and testing was performed by ASTM standards. Main objective of this research work is to investigate the effects of use of natural fiber in the composite material with the synthetic fiber. Experimental results revealed that hybridization of composite with natural and synthetic fibers shows promising tensile strength, flexural strength and hardness. Among the hybrid composites one with the composition of three layers of glass fibers and two layers of hessian cloth (jute fiber) showed highest ten sile strength and flexural strength which were found 104.63 MPa and 134.65 MPa respectively. Water absorption was high in composites having higher hessian cloth content than glass fiber. Composite with high glass fiber content showed high hardness which was 39.9 HV.Bangladesh J. Sci. Ind. Res. 51(2), 81-88, 2016

scholarly journals Natural Fiber-Reinforced Polylactic Acid, Polylactic Acid Blends and Their Composites for Advanced Applications

Polymers ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 202 ◽  
Author(s):  
R. A. Ilyas ◽  
M. Y. M. Zuhri ◽  
H. A. Aisyah ◽  
M. R. M. Asyraf ◽  
S. A. Hassan ◽  
...  
Keyword(s):  
Polylactic Acid ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Matrix Material ◽  
Natural Fibers ◽  
Barrier Properties ◽  
Green Composites ◽  
Fiber Reinforced ◽  
Material Development ◽  
Wide Range

Polylactic acid (PLA) is a thermoplastic polymer produced from lactic acid that has been chiefly utilized in biodegradable material and as a composite matrix material. PLA is a prominent biomaterial that is widely used to replace traditional petrochemical-based polymers in various applications owing environmental concerns. Green composites have gained greater attention as ecological consciousness has grown since they have the potential to be more appealing than conventional petroleum-based composites, which are toxic and nonbiodegradable. PLA-based composites with natural fiber have been extensively utilized in a variety of applications, from packaging to medicine, due to their biodegradable, recyclable, high mechanical strength, low toxicity, good barrier properties, friendly processing, and excellent characteristics. A summary of natural fibers, green composites, and PLA, along with their respective properties, classification, functionality, and different processing methods, are discussed to discover the natural fiber-reinforced PLA composite material development for a wide range of applications. This work also emphasizes the research and properties of PLA-based green composites, PLA blend composites, and PLA hybrid composites over the past few years. PLA’s potential as a strong material in engineering applications areas is addressed. This review also covers issues, challenges, opportunities, and perspectives in developing and characterizing PLA-based green composites.

scholarly journals Reinforcement of Polylactic acid (PLA) bio-composite with lignin from oil palm empty fruit bunches (OPEFB) for 3D printing application

2021 ◽  
Vol 1192 (1) ◽  
pp. 012014
Author(s):  
M S Pairon ◽  
F Ali ◽  
H Anuar ◽  
F Ahmad ◽  
J Suhr ◽  
...  
Keyword(s):  
Composite Material ◽  
3D Printing ◽  
Mechanical Strength ◽  
Polylactic Acid ◽  
Oil Palm ◽  
Extraction Yield ◽  
Empty Fruit Bunches ◽  
Chemical Structures ◽  
Lignin Extraction ◽  
3D Printed

Abstract Polylactic acid (PLA) has been used as an additive material in 3D printing due to its toxic-free and environmentally friendly property. Lignin with complex and branched chemical structures had been used as a filler to improve the mechanical strength of PLA. The availability of oil palm empty fruit bunches (OPEFB) in Malaysia had made this material a good source for lignin extraction. Thus, in this research, we aim to study the mechanical strength of PLA bio-composite material with reinforcement of lignin from OPEFB. The lignin was extracted by 1,4-dioxane with hydrochloric acid as a catalyst. The recovery of lignin from extraction solvent was done by precipitation. The lignin was successfully extracted from OPEFB with 9.04% of lignin extraction yield. The PLA/lignin bio-composite filament with 0.1% (w/w) lignin was performed by filament extruder and then used for 3D printing. The prepared sample in the form of filament and 3D printed material was characterized for mechanical strength and surface morphology. The Young’s modulus, ultimate strength and elongation at break of the PLA/lignin bio-composite sample had increased 11%, 7% and 10% respectively. After the filament was used for 3D printing, the reduction of mechanical strength had been observed. The morphology by scanning electron microscopy (SEM) confirmed the presence of lignin on the fracture surface of PLA bio-composite material. Apart from that, the interlayer adhesion had been observed in the 3D printed PLA/lignin bio-composite that caused the drop in mechanical strength of the material.

Sign in / Sign up

Export Citation Format

Share Document