Moisture absorption of unidirectional hybrid composites

The present paper discovers the effect of ceramic filler inclusion on physico-mechanical and water absorption behaviour of untreated and chemically treated (alkali and benzoyl chloride treated) bi-directional jute natural-fiber-reinforced epoxy composites. In practice, the major drawbacks of using natural fibers are their high degree of moisture absorption and poor dimensional stability. Currently, chemical treatments are able to induce fiber modifications that increase their resistance when utilized in composite products. Jute fibers were subjected to various chemical modifications to improve the interfacial bonding with the matrix. In this study, an analysis has been carried out to make pre-treated jute fiber (10, 20, 30 and 40 wt.%) and different filler content (5 and 10 wt.%) with epoxy-based composites. A comparative study of all the untreated jute/aluminium oxide based hybrid composites with chemically treated jute/aluminium oxide based hybrid composites was carried out. The investigational result reveals that chemically treated composites considerably improved the mechanical properties of the composite. The maximum water absorption resistance and strength properties were found with benzoyl chloride-treated fiber-reinforced composite. Lastly, the surface morphology of fractured surfaces after tensile and flexural testing is studied using scanning electron microscope.

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Demonstration of pseudo-ductility in unidirectional hybrid composites made of discontinuous carbon/epoxy and continuous glass/epoxy plies

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2015.01.019 ◽

2015 ◽

Vol 72 ◽

pp. 75-84 ◽

Cited By ~ 37

Author(s):

Gergely Czél ◽

Meisam Jalalvand ◽

Michael R. Wisnom

Keyword(s):

Hybrid Composites ◽

Continuous Glass ◽

Unidirectional Hybrid

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Development of Hybrid Cellulosic-Keratineous Fibers Base Epoxy Composites for Automobile Applications

Advanced Technologies & Materials ◽

10.24867/atm-2020-2-002 ◽

2020 ◽

Vol 45 (2) ◽

pp. 10-16

Author(s):

Isiaka Oluwol Oladele ◽

Opeyemi Emmanuel Barbarinde ◽

Okikiola Ganiu Agbabiaka ◽

Micheal Hope Adegun ◽

Adelani Samson Oluwagbenga ◽

...

Keyword(s):

Epoxy Matrix ◽

Moisture Absorption ◽

Hybrid Composites ◽

Epoxy Composites ◽

Moisture Resistance ◽

Wear Property ◽

Coir Fiber ◽

Mechanical Wear ◽

Thermal Insulating ◽

Feather Fiber

The development of hybrid cellulosic-keratinous fibers reinforced epoxy composites was investigated in this study. Hybrid composites were fabricated by mixing coir fiber (CF) and chicken feather fiber (CFF) with the epoxy matrix in a randomly dispersed approach. The mechanical properties such as tensile, flexural and hardness properties were determined. Also, wear property, thermal conductivity and moisture absorption potentials of the developed composites were studied while the surface morphology of the composite fracture surface was examined using scanning electron microscopy (SEM). The results revealed that all the selected properties were improved compared to the unreinforced epoxy matrix. Sample with 1% CF and 2% CFF gave the optimum results and the combination of good mechanical, wear, thermal insulating and moisture resistance properties. It was discovered that higher volume of CFF in synergy with low volume of CF was responsible for performance. The results revealed that the materials can be used in automobile due to the inclusion of light-weight bio-fibers that gave good insulating properties in epoxy composites in conjunction with good mechanical, wear and moisture resistance.

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The Influence of Moisture Absorption on the Mechanical and Thermal Properties of Chemically Treated DPL Reinforced Hybrid Composite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.978.316 ◽

2020 ◽

Vol 978 ◽

pp. 316-322 ◽

Cited By ~ 1

Author(s):

Priyadarshi Tapas Ranjan Swain ◽

Sankar Narayan Das ◽

Prabina Kumar Patnaik ◽

Abhilash Purohit

Keyword(s):

Thermal Properties ◽

Glass Fiber ◽

Moisture Absorption ◽

Natural Fiber ◽

Hybrid Composites ◽

Synthetic Fiber ◽

Differential Scanning Calorimetric ◽

Mechanical And Thermal Properties ◽

Weight Percentage ◽

Chemically Treated

Moisture absorption of natural fiber-based composites is one of the major problems in outdoor applications. The present study deals with the effect of moisture absorption on mechanical and thermal properties of unmodified/modified Date Palm Leaf (DPL) with glass fiber-based hybrid composites. Natural fibers were modified with alkaline treatment to improve fiber and matrix bonding. Conventional hand lay-up technique is used to fabricate the composites with varying different wt.% of treated and untreated short DPL with constant wt.% of glass fiber and prepared with random oriented manner. The combine effect of hydrophilic and hydrophobic nature find out as the study based upon the natural with synthetic fiber hybrid composites. Mechanical behaviour of the epoxy-based hybrid composites were characterized by using tensile, flexural and hardness test. The results revealed that significant improvement in mechanical properties by the addition of different weight percentage of modified DPL. Different thermal properties of the composites were described by using Thermo Gravimetric Analyzer (TGA) and Differential Scanning Calorimetric (DSC). Morphological investigation was carried out to by using scanning electron microscope. All the properties of untreated natural fiber reinforced composites were mostly affected by the influence of water absorption as compared with chemically treated based composites.

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Mechanical, Absorption and Swelling Properties of Vinyl Ester Based Natural Fibre Hybrid Composites

Applied Science and Engineering Progress ◽

10.14416/j.asep.2021.08.006 ◽

2021 ◽

Author(s):

Nadeem Ahmed Nasimudeen ◽

Sharwine Karounamourthy ◽

Joshua Selvarathinam ◽

Senthil Muthu Kumar Thiagamani ◽

Harikrishnan Pulikkalparambil ◽

...

Keyword(s):

Impact Strength ◽

Hybrid Composite ◽

Vinyl Ester ◽

Moisture Absorption ◽

Hybrid Composites ◽

Natural Fibre ◽

Potential Candidate ◽

Swelling Properties ◽

Flexural Testing ◽

Structural Applications

Natural fibres such as Banana (B), Jute (J) and Kenaf (K) were hybridized in different stacking sequences in vinyl ester. The composites with hybridized fibres were tested to evaluate their tensile, flexural and impact properties. Further, they were also tested for their water absorption and thickness swelling behavior. The hybridization of the fibre mats had an encouraging outcome on the mechanical behavior. The JKBKBJ hybrid composite possessed the maximum tensile strength (34.12 MPa) while maximum stiffness of 1.667 GPa was observed for the KBJJBK hybrid composites. The observations from the flexural testing indicated that the hybrid composites resisted the flexural load for higher displacement. All the hybrid configurations presented better impact strength over the composites reinforced with kenaf and jute fibres. Among the hybrid composites investigated, the KJBBJK hybrid composite displayed highest impact strength (12.32 kJ/m2). The improved strength, stiffness and lower moisture absorption properties make the composites with hybridized fibres a potential candidate for the light weight structural applications.

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