scholarly journals Surface Modification of Areca Fibre by Benzoyl Peroxide and Mechanical Behaviour of Areca-Epoxy Composites

2021 ◽  
Vol 18 (1) ◽  
pp. 48-55
Author(s):  
Sakshi Shantharam Kamath ◽  
Basavaraju Bennehalli
Keyword(s):  
Surface Modification ◽  
Benzoyl Peroxide ◽  
Stress Transfer ◽  
Natural Fibre ◽  
Sem Analysis ◽  
Epoxy Composites ◽  
Fibre Composites ◽  
The Matrix ◽  
Reinforcing Material ◽  
Treatment Concentration

Natural fibre composites are playing great role in current life scenario where the focus is more on replacing synthetic fibre composites with natural fibre composites. In this current study, investigation was done on tensile and flexural behaviour of benzoyl peroxide treated areca sheath fibre epoxy composites. The surface modification of the fibre was confirmed by FTIR analysis. Treatment concentration was the major criteria which effects mechanical properties of the composites. At 4% concentration tensile strength and flexural strength was found to be maximum which was reported as 37.05 N/mm2 and 235.5 N/mm2 respectively which gradually decreased with increasing concentration of benzoyl peroxide. SEM analysis proved that at lesser concentration, the bonding between fibre and resin was effective which reduced as the concentration of benzoyl peroxide increased. This results in ineffective stress transfer between reinforcing material and the matrix which was the reason for failure of composites manufactured at higher treatment concentration.

scholarly journals Characterization of continuous Hibiscus sabdariffa fibre reinforced epoxy composites

2022 ◽  
Vol 30 ◽  
pp. 096739112110609
Author(s):  
Atik Mubarak Kazi ◽  
Ramasastry DVA
Keyword(s):  
Fibre Orientation ◽  
Stress Transfer ◽  
Dynamic Mechanical Properties ◽  
Epoxy Composites ◽  
Neat Epoxy ◽  
Hibiscus Sabdariffa ◽  
Sem Images ◽  
Fibre Composites ◽  
The Matrix

The influence of fibre orientation on physical, mechanical and dynamic mechanical properties of Hibiscus sabdariffa fibre composites has been studied. The composites with longitudinal (0°), transverse (90°) and inclined (45°) fibre orientation were prepared using the hand layup technique. ASTM standards were used for characterization of continuous Hibiscus sabdariffa fibre composites. The composite with longitudinally placed fibres yields improved mechanical characteristics. The addition of longitudinal (0°) oriented continuous Hibiscus sabdariffa fibres to the epoxy enhances tensile strength by 460%, flexural strength by 160% and impact strength by 603% compared to neat epoxy. The longitudinal (0°) fibre oriented composite offers higher resistance to water absorption and thickness swelling compared to other types of composites. All continuous Hibiscus sabdariffa fibre epoxy composites possess an improved storage modulus than the neat epoxy resin. The glass transition temperature of continuous Hibiscus sabdariffa fibre composites is 8%–31% lower than that of neat epoxy. Scanning electron microscopy (SEM) images confirm the existence of voids in the matrix, fibre pullout and crack propagation near the fibre bundle, which indicates the stress transfer between fibre and matrix is non-uniform.

Physical and Wear Properties of UHMWPE Fabric Reinforced Epoxy Composites

2020 ◽  
Vol 17 (1) ◽  
pp. 7577-7586 ◽  
Author(s):  
P. Rajendra Prasad ◽  
J. N. Prakash ◽  
L. H. Manjunath ◽  
P. Venkateshwar Reddy
Keyword(s):  
Wear Rate ◽  
Sem Analysis ◽  
Epoxy Composites ◽  
Specific Wear Rate ◽  
Synthetic Fiber ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Steel Material ◽  
The Matrix ◽  
Pin On Disc

Usage of synthetic fiber reinforced composites has increased rapidly because of their excellent properties such that it acts as a replacement for metals in the recent days. The physical and wear properties of Ultra-High Molecular Weight Polyethylene (UHMWPE) fabric reinforced epoxy composites have been studied in this present work. Using pin-on-disc test rig, dry-sliding wear of test specimens have been tested against disc of EN31 steel material. The plain woven bi-directional 200gsm and 240gsm UHMWPE fabric reinforced epoxy composites were fabricated by hand lay-up method at room temperature. All the tests were conducted as per the Taguchi’s L9 orthogonal-array. The process parameters considered in the present study is load, sliding velocity and sliding time with three levels each. Specific wear rate is considered as the response variable.  Optimization is carried out to find best combination of parameters on specific wear rate.  From the results, it is evident that load has greater influence on specific wear rate than other two considered parameters.  Scanning Electron Microscopy (SEM) analysis was also carried out to examine the matrix distribution over fabric (reinforcement) and also their bonding between reinforcement and matrix.

Mechanical behaviour and microscopic analysis of epoxy and E-glass reinforced banyan fibre composites with the application of artificial neural network and deep neural network for the automatic prediction of orientation

2020 ◽  
Vol 55 (2) ◽  
pp. 213-234 ◽  
Author(s):  
Suraj Shyam ◽  
Shivam Kaul ◽  
Nirav Kalsara ◽  
T Narendiranath Babu
Keyword(s):  
Neural Network ◽  
Mechanical Behaviour ◽  
Deep Neural Networks ◽  
Microscopic Analysis ◽  
Natural Fibre ◽  
X Ray ◽  
Fibre Composites ◽  
The Matrix ◽  
Naoh Solution ◽  
Made In

This paper deals with the testing of tensile and flexural behaviour of epoxy-reinforced natural fibre composites, for which Banyan fibres have been selected as the natural fibre. Variations are made in the orientation of the fibres to determine which orientation made the composite the strongest. The fibre strands are arranged in different orientations, such as the uniaxial, biaxial and criss-cross arrangements, to differentiate between the orientations and observe which arrangement exhibited the best mechanical behaviour. The fibres are initially washed with 0.5% weight/volume (w/v) NaOH solution, following which specimens of the composites are made using wooden moulds designed according to ASTM standards. Biaxial layers of E-glass are incorporated into the matrix in an attempt to enhance the mechanical properties of the specimen. The variances observed in the Young’s modulus are analysed to understand the factors that majorly impacted it. For a better understanding of the results, the chemical functional groups and the microstructure of the samples are analysed with the aid of Fourier-Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM) and X-Ray powder Diffraction (XRD). Additionally, predictive models are simulated using Artificial and Deep Neural Networks to recognise patterns in the data, by varying specific parameters. The results obtained indicated that Banyan fibre composites can replace conventionally-used materials and serve real-world purposes better.

scholarly journals A Study of the Effect of Acetylation and Propionylation on the Interface of Natural Fibre Biodegradable Composites

2005 ◽  
Vol 14 (2) ◽  
pp. 096369350501400 ◽  
Author(s):  
V. Tserki ◽  
C. Panayiotou ◽  
N. E. Zafeiropoulos
Keyword(s):  
Composite Materials ◽  
Negative Impact ◽  
Fibre Composite ◽  
Stress Transfer ◽  
Natural Fibre ◽  
Surface Treatments ◽  
Biodegradable Composites ◽  
Interface Surface ◽  
Fibre Composites ◽  
Materials Used

Composite materials are a class of materials used in many diverse applications. Very recently the attention has shifted to the development of green composites that are easily recycleable and in this case the use of biodegradable matrices and fibres appear to be highly attractive. In the present study a class of biodegradable polyesters are used as matrices to produce fully biodegradable composites, reinforced with lignocellulosic natural fibres. This new class of composites is fully biodegradable, but the key aspect that governs the behaviour of the composites remains the interface. Surface treatments, although having a negative impact on economics, may improve the compatibility and strengthen the interface in natural fibre composite materials. In the present study the effect of two surface treatments, namely acetylation and propionylation, upon the interface of natural fibre composites is assessed by means of fragmentation tests. It has been found that both treatments led to an improvement of the stress transfer efficiency at the interface, and both applied treatments were optimised, accordingly.

scholarly journals The Effect of Jackfruit Skin Powder and Fiber Bleaching Treatment in PLA Composites with Incorporation of Thymol

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2622
Author(s):  
Muhammad Najib Ahmad Marzuki ◽  
Intan Syafinaz Mohamed Amin Tawakkal ◽  
Mohd Salahuddin Mohd Basri ◽  
Siti Hajar Othman ◽  
Siti Hasnah Kamarudin ◽  
...  
Keyword(s):  
Food Packaging ◽  
Fibre Composite ◽  
Low Cost ◽  
Thermal Characterization ◽  
Natural Fibre ◽  
Poly Lactic Acid ◽  
Tropical Fruit ◽  
Fibre Composites ◽  
The Matrix ◽  
Bleaching Treatment

Food packaging has seen a growth in the use of materials derived from renewable resources such as poly(lactic acid) (PLA). However, the initial costs to produce bioplastics are typically high. Tropical fruit waste as naturally sourced fibres, such as jackfruit skin, can be used as a cost-reducing filler for PLA. The main objective in this study is to fabricate a low-cost natural fibre-reinforced polymer that potentially applies in packaging with the aid of bleaching treatment. The treatment shows a rougher surface fibre in Scanning electron microscopy (SEM) micrographs and it is expected to have better mechanical locking with the matrix, and this is found similar with a Fourier-transform infrared spectroscopy (FTIR) analysis. Unfortunately, fibre insertion does find low tensile performances, yet bleached-fibre composites improved its performance significantly. A similar situation was found in the thermal characterization where a low-thermal stability natural fibre composite has lower thermal behaviour and this increased with bleaching treatment. Besides, bleached-fibre composites have a longer service period. Besides, a 15 wt% thymol insertion inhibits the growth of Gram-positive bacteria in the composites and the non-treated fibre composite has better thymol effects. The 30 wt% of the bleached-fibre insertion composite has a high potential to reduce the cost of bioplastic products with minimum alterations of overall performances.

Mechanical Characterization of Polypropylene Natural Fibre Composites

2011 ◽  
Vol 383-390 ◽  
pp. 2737-2740 ◽  
Author(s):  
Sd Jacob Muthu ◽  
Ratnam Paskaramoorthy
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characterization ◽  
Fibre Surface ◽  
Alkaline Treatment ◽  
Natural Fibre ◽  
Fibre Composites ◽  
The Matrix ◽  
Pp Composites ◽  
Fibre Loading

Using polypropylene (PP) as matrix and kenaf mat as reinforcement, composite test samples were fabricated by compression molding. Thereafter, the effect of fibre loading and the alkaline fibre surface treatment on the mechanical properties were studied. The kenaf/PP composites were found to have better mechanical properties than the polymer matrix. As expected, the interfacial bonding between the matrix and the fibres improved considerably when the fibres were subjected to alkaline treatment.

scholarly journals Interfacial Pathways in Wood

2000 ◽  
Vol 9 (1) ◽  
pp. 096369350000900 ◽  
Author(s):  
Caroline Baillie ◽  
Delphine Tual ◽  
Jean Christophe Terraillon
Keyword(s):  
Environmental Conditions ◽  
Materials Science ◽  
Interfacial Crack ◽  
Stress Transfer ◽  
High Strength ◽  
Interfacial Stress ◽  
Fibre Composites ◽  
The Matrix ◽  
Energy Absorbing ◽  
Crack Paths

Wood structure and properties have been established for many years. The interaction of structure with properties has also been studied, but rarely from a materials science perspective. This paper attempts to focus on a particular aspect of composite structure, that of the interface. In engineered fibre composites the interface is the most important feature as it is the medium by which the stress is transferred from the matrix to the fibres so that they may bear the load. Much research has been focused on solving the optimisation of the interfacial stress transfer, as it is always suggested that the interface needs to be weak for high toughness and strong for high strength of the composite. More recent studies have identified the fact that it may be more advantageous to create an interface, which is not destructive in its energy absorbing capacity. Another area of weakness at the interface is the resistance to water ingress in certain environmental conditions. Biomimetics is an emerging approach to solving scientific issues by looking to nature to see what solutions are offered for the particular concerns of engineers and their products. In this case wood is the subject of study. It is assumed that wood has optimised its internal interfaces to cope with strength and toughness requirements as well as harsh environmental conditions. The internal interfaces thus need to be firstly examined and identified. This paper looks in a qualitative way at the three different interfacial crack paths which may be likened to those occurring in engineered composites: interfacial, interlaminar and intercellular (bundle/bundle interaction) and their proposed relation to energy absorption mechanisms, It also explores the influence of moisture on these fracture paths.

scholarly journals Natural Vegetable Fibre / Plasticised Natural Vegetable Fibre - a Candidate for Low Cost and Fully Biodegradable Composite

1999 ◽  
Vol 8 (5) ◽  
pp. 096369359900800 ◽  
Author(s):  
Xun Lu ◽  
Ming Qiu Zhang ◽  
Min Zhi Rong ◽  
Guang Shi ◽  
Gui Cheng Yang ◽  
...  
Keyword(s):  
Fibre Composite ◽  
Low Cost ◽  
Natural Fibre ◽  
Pine Sawdust ◽  
Natural Fibre Composite ◽  
Biodegradable Composite ◽  
Fibre Composites ◽  
Heterogeneous Nature ◽  
The Matrix ◽  
Vegetable Fibre

A novel fibre composite consisting of natural vegetable fibre as the reinforcer and plasticised natural vegetable fibre as the matrix was studied. By means of cyanoethylation and chlorination, pine sawdust and chopped sisal were converted into thermoplastics and then compounded with sisal and ramie fibres. The natural fibre composite not only exhibits properties similar to those of conventional fibre composites, but also is characterised by easy processing, enviromental frendliness, low cost and capability of tailoring property due to the physically heterogeneous nature.

scholarly journals Impact of Long-Term Weathering on the Properties of a Digestate-Based Biocomposite

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Marion Gebhardt ◽  
Markus Milwich ◽  
Götz T. Gresser ◽  
Andreas Lemmer
Keyword(s):  
Mechanical Properties ◽  
Natural Fibre ◽  
Material Strength ◽  
Plant Oil ◽  
High Increase ◽  
Long Term Stability ◽  
Fibre Composites ◽  
The Matrix ◽  
Main Substrate

AbstractNatural fibre composites are increasingly used. For many applications, the long-term stability of the mechanical properties is crucial. Therefore, the effects of weathering of a biocomposite made from fibrous digestate and bio-based thermoset are investigated. The fibre component of the composite comes from digestate of a German biogas station which processes hop vines as main substrate. The matrix is a plant-oil-based epoxy resin. The samples were alternately exposed to UV radiation and moisture for various lengths of time. Afterwards, the material strength and water absorption were tested. As a result, the weathering leads to a decrease of strength but not to a high increase of water uptake.

Influence of Geotextile and Geogrid Reinforcement on Strength Behaviour of Soft Silty Soil

2018 ◽  
Vol 877 ◽  
pp. 264-269 ◽  
Author(s):  
Ayush Mittal ◽  
Shalinee Shukla
Keyword(s):  
Road Network ◽  
Rupture Strength ◽  
Stress Transfer ◽  
Sem Analysis ◽  
Test Results ◽  
Geogrid Reinforcement ◽  
Passenger Traffic ◽  
Freight Traffic ◽  
Subgrade Soil ◽  
Reinforcing Material

Roads are the most important component for the economic and social development of any country. India has a total road network of more than 6 million kilometers, which carry around 90% of passenger traffic and 65% of freight traffic. More than 20% land area of India is covered with soils having low California bearing ratio (CBR) and shear strength values. The pavement constructed over such soils will lead to rapid increase in construction and maintenance costs. This study presents a laboratory investigation about the combined effect of geotextile and geogrid reinforcement, placed in layers at various depths from top of specimen, on the strength behaviour of poor subgrade soil. Heavy compaction, soaked CBR and unconfined compressive strength (UCS) tests are conducted. The test results indicate significant improvement in CBR and UCS values for all geosynthetic reinforced cases, whereas ductility and rupture strength remains almost constant as compared to virgin soil. Scanning electron microscopy (SEM) analysis shows significant bonding between soil particles and fibers of geogrid, causing stress transfer from soil to reinforcing material and hence preventing soil from overstressing. It is concluded that combination of geogrid and geotextile can be used effectively for reinforcing poor subgrade soil.

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