scholarly journals Effect of Moisture Absorption on Hardness of Surface Treated Luffa Cylindrica /Polyster Composite

2019 ◽  
Vol 9 (1S4) ◽  
pp. 41-43
Keyword(s):  
Moisture Absorption ◽  
Natural Fibers ◽  
High Hardness ◽  
High Strength ◽  
Fiber Reinforced ◽  
Luffa Cylindrica ◽  
Compression Moulding ◽  
Optimum Pressure ◽  
Polyester Composite ◽  
Naoh Solution

The natural fibers have been received much more attention in research due the better compatibility, high strength, easy availability etc. The work addresses the moisture absorption on surface treated luffa fiber reinforced polyester composite. The fibers are treated with NAOH solution. The luffa fiber reinforced polyester composite were prepared by the compression moulding technique with optimum pressure of 17MPa. The composites were prepared for 50% fiber loading condition. The prepared composites are subjected to moisture absorption test for 1hr,5 hr and 10hrs. The result shows that the treated composite possesses the high hardness than the untreated composites.

scholarly journals AN EXPERIMENTAL INVESTIGATION OF THE EFFECT OF NATURAL FIBER TREATMENT AND MARINE ENVIRONMENT ON CANNABIS SATIVA/EPOXY LAMINATES

2021 ◽  
pp. 1-7
Author(s):  
K N CHETHAN ◽  
Sharun Hegde ◽  
Rajesh Kumar ◽  
Padmaraj N H
Keyword(s):  
Marine Environment ◽  
Moisture Absorption ◽  
Cannabis Sativa ◽  
Natural Fiber ◽  
Matrix Material ◽  
Potassium Hydroxide Solution ◽  
Flexural Behavior ◽  
Fiber Reinforced ◽  
Compression Moulding ◽  
Untreated Fiber

Materials have helped in evolving technology to a great extent. Composites have replaced conventional metals/non-metals because of their lightweight. Natural Fibres have been need of the hour owing to environmental concerns and ease of availability. In this work, Cannabis Sativa fibers were treated with 5% Potassium Hydroxide solution. The laminates were prepared by the Compression Moulding technique by reinforcing treated and untreated fibers with an epoxy matrix material. To access the durability of natural fiber composites in the marine environment, prepared laminates were aged in seawater for 150 days. Tensile, flexural and moisture absorption behavior tests have been performed to estimate the durability in seawater. The data obtained have been compared with pristine treated and untreated fiber reinforced samples. From the results, it has been observed that tensile and flexural behavior of untreated fiber reinforced composites were superior to a treated counterpart in both pristine and aged conditions.

Hydrophobic treatment of natural fibers and their composites—A review

2016 ◽  
Vol 47 (8) ◽  
pp. 2153-2183 ◽  
Author(s):  
Azam Ali ◽  
Khubab Shaker ◽  
Yasir Nawab ◽  
Madeha Jabbar ◽  
Tanveer Hussain ◽  
...  
Keyword(s):  
Large Scale ◽  
Moisture Absorption ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Fiber Reinforced Composites ◽  
Annual Growth Rate ◽  
Scale Production ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Compound Annual Growth Rate

There is a growing interest in the development of natural fiber-reinforced composites, most likely due to their wide availability, low cost, environment friendliness, and sustainability. The market size for natural fiber-reinforced composites is projected to reach $5.83 billion by 2019, with a compound annual growth rate of 12.3%. The composite materials reinforced with wood, cotton, jute, flax or other natural fibers fall under this category. Meanwhile, some major factors limiting the large scale production of natural fiber composites include the tendency of natural fiber to absorb water, degradation by microorganisms and sunlight and ultimately low strength and service life. This paper has focused to review the different natural fiber treatments used to reduce the moisture absorption and fiber degradation. The effect of these treatments on the mechanical properties of these composites has also been summarized.

scholarly journals Examination on Tribological Properties of Luffa Fiber Reinforced Polyester Composites

2019 ◽  
Vol 9 (1S4) ◽  
pp. 923-925
Keyword(s):  
Coefficient Of Friction ◽  
Unsaturated Polyester ◽  
Wear Test ◽  
Fiber Reinforced ◽  
Rotating Disc ◽  
Compression Moulding ◽  
Optimum Pressure ◽  
Fiber Loading ◽  
Polyester Composites ◽  
Sliding Distance

In this work Tribological property of luffa fiber reinforced unsaturated polyester composites are carried out. The composites were fabricated using the compression moulding technique with optimum pressure of 150Mpa. The fabricated specimens were cut as per the ASTM standard of the wear test and ASTM G99 as followed for the entire testing of the wear. In this work, the applying load and velocity of the rotating disc was considered as a process parameter. The fiber loading was taken for the specimen to be fabricated as 30%. The test on the specimen was conducted for 10N, 20N, 30 N and velocity of 1m/s, 2m/s, 3m/s respectively. The result shows that coefficient of friction increase when increases in sliding distance..

Design, Fabrication and Experimental Analysis of Pandanus Fibre Reinforced Polyester Composite

2014 ◽  
Vol 984-985 ◽  
pp. 253-256
Author(s):  
G. Veerakumar Vigneshwaran ◽  
Iyyadurai Jenish ◽  
Rajeshwaran Sivasubramanian
Keyword(s):  
Weight Ratio ◽  
Composite Plates ◽  
High Strength ◽  
Natural Fibre ◽  
Compression Moulding ◽  
Weight Percentage ◽  
Pine Tree ◽  
Water Treatment Process ◽  
Polyester Composite ◽  
Screw Pine

Due to the light weight, high strength to weight ratio, corrosion resistance and other advantages, natural fibre based composites are becoming important composite materials in mechanical engineering fields. The current project emphasizes the newly identified Pandanus Fibre (Pandanus Fascicularis) which is extracted from the stem of screw pine tree by the manual water treatment process. The mechanical properties of chopped Pandanus fibre by Polyester composites are investigated and compared with the similar natural fibres in the fibre reinforced composite material field. The composite plates were fabricated with raw pandanus fibres by compression moulding method with varying weight percentage and lengths of fibre.

Microstructures and Mechanical Properties of Natural Fibers

2008 ◽  
Vol 33-37 ◽  
pp. 553-558 ◽  
Author(s):  
Yan Li ◽  
Yan Ping Hu ◽  
Chun Jing Hu ◽  
Ye Hong Yu
Keyword(s):  
Mechanical Properties ◽  
Moisture Absorption ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Specific Strength ◽  
Mechanical Performances ◽  
Set Up

Natural fibers are excellent substitute materials for man made fibers in making fiber reinforced composites due to their high specific strength and modulus, low density, low price, easy availability in some countries, recyclable and degradable properties. They have raised great attentions among material scientists and engineers in the past decade. Many researches have been conducted to study the mechanical properties, especially interfacial properties of natural fiber reinforced composites. However, the properties, such as mechanical performances, moisture absorption behaviors, et. al of natural fibers themselves have been seldom investigated. Knowing the relationship between microstructures and properties of natural fibers are important for understanding the bulk properties of natural fiber composites and also good instructions for designing bio-mimic materials. In this study, four kinds of natural fibers which were extracted from different plant sources were investigated. The microstructures of these natural fibers were revealed with the aid of optical microscopy. Microstructure models were thereof set up and mechanical properties for the representative volume element were assumed. Fiber bundle fracture models together with probability statistics analysis were employed to calculate the mechanical properties of natural fibers. The results were compared with the experimental measurements. Different mechanical behaviors of natural fibers which were functioned differently in the nature were clearly explained by the above studies

Comparative Studies on the Mechanical and Thermo-Mechanical Performance of Flax Fiber Reinforced Polyester and Polyester-Biopolymer Blend Resins

2013 ◽  
Vol 747 ◽  
pp. 399-402
Author(s):  
Mahesh Hosur ◽  
Harika Maroju ◽  
Shaik Jeelani
Keyword(s):  
Surface Treatment ◽  
Load Transfer ◽  
Moisture Absorption ◽  
Mechanical Performance ◽  
Natural Fibers ◽  
Fiber Surface ◽  
Good Alternative ◽  
Fiber Reinforced ◽  
Flax Fibers ◽  
Fiber Surface Treatment

Bio-composites made of biopolymer and natural fibers provide good alternative to traditional fiber reinforced composites made of synthetic fibers and non-biodegradable polymers. In order for biocomposites to attain widespread applications and acceptance, compatibility between natural fibers and biopolymers in terms of good interfacial load transfer should be established which could be obtained through fiber surface treatment. Hence, current investigations were focused on the surface treatment of fiber and study its influence on the adhesion between fiber and polymer matrix. Initially, dew retted flax fibers were treated with alkali by varying concentration keeping temperature and time constant. The fibers were treated with 2.5, 5, and 7% of alkali at room temperature for one hour. 2.5% treated fiber showed comparatively better properties than higher concentration. Hence, for further studies, all flax fibers were treated with 2.5% solution of alkali at different temperatures. In the next phase of study, biocomposites were prepared by immersing fiber mats in resin bath and compression molded using a hot press. Two polymers: Polyester and a polyester-biopolymer blend, ENVIREZ® 1807 were used as matrix. Moisture absorption, mechanical and thermomechanical tests were conducted on the composites. It was determined that treated composites showed reduction in moisture uptake compared to untreated. Alkali treated composites showed an increase in flexural properties as well as storage modulus. The improvement of composites properties is attributed to the chemical treatment. Composites made using ENVIREZ® 1807 which has about 18% of natural polymer blend showed comparable properties with those of polyester resin system with potential to reduce amount of styrene used in fabrication.

scholarly journals Water Absorption Behavior on Natural/ Synthetic Fibre Reinforced Polymer Composites

2019 ◽  
Vol 9 (1S4) ◽  
pp. 5-9
Keyword(s):  
Water Absorption ◽  
Moisture Absorption ◽  
Unsaturated Polyester ◽  
Compression Moulding ◽  
Effect Of Water ◽  
Polyester Composite ◽  
Fibre Reinforced Polymer ◽  
Water Absorption Effect ◽  
Glass Mat ◽  
Water Gain

This paper deals with the effect of moisture absorption on single coconut sheath fiber and single glass fibre. Additionally, the moisture effect in fibre reinforced unsaturated polyester composites like coconut sheath (CS) and Glass mat (GM) composite. Initially, CS and GM fibre reinforced polyester composite were produced through hand layup followed by compression moulding method. CS/UPR and GM/UPR composites were made through water treatment by dipping those composites in ordinary water for various time intervals at room temperature to study the water absorption effect. At different time periods, the absorption of water showed gradual increment. The effect of water gain in percentage for CS and GM was observed. From this experiment, it is concluded that the effect of water gain in CS/UPR composite is higher than GM/UPR composite.

scholarly journals A Review on Natural Fiber Reinforced Composites and its Applications.

2021 ◽  
Vol 9 (8) ◽  
pp. 1917-1921
Author(s):  
SANDEEP KUMAR
Keyword(s):  
Moisture Absorption ◽  
Natural Fiber ◽  
Fiber Type ◽  
Natural Fibers ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
High Moisture ◽  
Materials Properties ◽  
Fiber Size

Abstract: Natural fibers are gaining numerous attention due to their ecofriendly nature and sustainability. The problem of global warming and environmental imbalance is being faced throughout the world which needs to be resolved. The aim of this review paper is to give a comprehensive review about the natural fiber reinforced composites and its applications. It also explains about the various surface treatments and which are applied to the natural fibers and their effects on these fibers. The properties of natural fibers vary on various factor such as fiber type, fiber size, orientation, and its structure. Being various advantages of natural fiber reinforced composites there are some disadvantages also which are high moisture absorption, lower mechanical properties and lower fire resistance which limits the applications of natural fiber reinforced composites. Keywords: Natural fibers, composite materials, properties, applications.

scholarly journals Effect of Surface Roughness on Jute Fiber Reinforced Polyester Composite using AWJM

2019 ◽  
Vol 9 (1S4) ◽  
pp. 869-872
Keyword(s):  
Surface Roughness ◽  
Cutting Tool ◽  
Manufacturing Sector ◽  
Water Pressure ◽  
Abrasive Particle ◽  
Machining Process ◽  
Jute Fiber ◽  
Fiber Reinforced ◽  
Compression Moulding ◽  
Polyester Composite

Roughness plays an important role in identifying how the real object interacts with the surrounding. The rough surface gets wear easily, so therefore the object manufacturing sector needs to get concentrate in it. Nowadays composite plays an important role as leading components with some good properties. So, the composite manufacturer needs to get more concentration on cutting technology. Other cutting technology, the tool wear is the most important drawbacks need to be considered. There is some non-traditional machining process in which the cutting tool is not used in it. In this work we use Abrasive water jet machine (AWJM) because it is one of the most used non-traditional machining process, which has no cutting tool and the mixture of abrasive particle of garnet 80 mesh and high-pressure water from the nozzle is used to cut the workpiece with some following parameters like stand-off distance (Sd), feed rate (Vf) and water pressure (P). The jute fiber reinforced polyester composite (JF/UPR) fabricated by compression moulding which is used for measuring surface roughness (Ra) and also to find the minimum Ra.

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