Mechanical and water absorption properties of nano TiO2 coated flax fibre epoxy composites

AbstractThe aim of this research was to study the feasibility of using wheat straw fiber with epoxy resin for developing natural fiber-polymer composites. For this purpose, the epoxy resin was reinforced with 5, 10, 15, 20, and 25 wt.% of the wheat straw fiber with the help of the hand lay-up technique. Further, in order to improve the composite characteristic, wheat straw fibers were treated with three different concentrations of alkali (1%, 3%, and 5%). The mechanical and water absorption properties of the treated fiber composites were characterized and compared with those of untreated fiber-filled epoxy composites. It was observed that the mechanical properties and water resistance were reduced with the increase in wheat straw fiber loading from 5 to 25 wt.%. Among the three levels of alkali treatment, the composite made with 3% alkali-treated fiber exhibited superior mechanical properties than the other untreated and treated fiber composites, which pointed to an efficient fiber-matrix adhesion. The scanning electron microscope was used to observe the surface features of the wheat straw fiber.

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An experimental study on the effect of nano-clay addition on mechanical and water absorption behaviour of jute fibre reinforced epoxy composites

Journal of Industrial Textiles ◽

10.1177/1528083718792915 ◽

2018 ◽

Vol 49 (5) ◽

pp. 597-620 ◽

Cited By ~ 18

Author(s):

S Ramakrishnan ◽

K Krishnamurthy ◽

R Rajasekar ◽

G Rajeshkumar

Keyword(s):

Water Absorption ◽

Absorption Rate ◽

Fibre Length ◽

Weight Fraction ◽

Epoxy Composites ◽

Jute Fibre ◽

Absorption Properties ◽

Nano Clay ◽

Naoh Treatment ◽

Fractured Surface

This study deals with the investigation of the mechanical and water absorption properties of jute fibre reinforced epoxy composites prepared by using hand layup method. The effects of fibre length (10, 20, 30 and 40 mm), fibre weight fraction (0%, 5%, 10%, 15%, 20% and 25%), concentration of NaOH treatment (5% and 10%) and nano-clay addition (1, 3, 5 and 7 wt%) on the aforementioned properties were determined. Morphological characterisation was performed for the tensile and flexural fractured surface of the specimens to study their microstructural failures. The results revealed that the composites reinforced with 5% of NaOH-treated fibre and 5 wt% of nano-clay exhibited higher tensile, flexural and impact strengths of 103.05 MPa, 162.8 MPa and 0.358 kJ/mm2 respectively, and lower water absorption rate. Moreover, the optimum fibre length and fibre weight fraction were found to be 30 mm and 20% respectively for better overall properties. These composites can be used for light and medium load applications.

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Effect of impregnation on hybrid mesoporous silica / kenaf reinforced epoxy composites in term of flexural, compressive and water absorption properties

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.14.4.2020.19.0593 ◽

2020 ◽

Vol 14 (4) ◽

pp. 7528-7539

Author(s):

F. Bajuri ◽

N. Mazlan ◽

M. R. Ishak ◽

M. K. A. Uyup

Keyword(s):

Mesoporous Silica ◽

Water Absorption ◽

Water Uptake ◽

Silica Content ◽

Epoxy Composites ◽

Impregnation Method ◽

Hot Press ◽

Compressive Properties ◽

Absorption Properties ◽

Press Method

In this work, mesoporous silica with designated amount was added in kenaf/epoxy composites to improve the mechanical properties of the composite and reduce the water uptake of fabricated composites. The composites were fabricated using hot press method (HP) and impregnation method (IMP). For HP specimens, silica was dispersed into epoxy resin using homogenizer before being applied to the kenaf mat and subsequently hot pressed. While for IMP specimens, the kenaf mat was placed inside the silica/epoxy solution under 600 mm Hg impregnation pressure before being hot pressed. The results for flexural properties revealed that IMP specimen with 40 vol% of kenaf fibre and 5 vol% of silica have the highest strength and modulus at 78.6 MPa and 5.11 GPa respectively. Same trend can be seen for compressive properties as the same specimen had the highest compressive strength and modulus at 69.3 MPa and 1.81 GPa respectively. Finally for water absorption properties, IMP specimens had a reduction in water uptake compared to its HP specimen counterparts with the same kenaf and silica content. IMP specimen with 60 vol% kenaf and 5 vol% silica had the lowest water uptake after 90 days of immersion in distilled water at 13.5% increase in weight.

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Synergistic effect of fiber content and length on mechanical and water absorption behaviors of Phoenix sp. fiber-reinforced epoxy composites

Journal of Industrial Textiles ◽

10.1177/1528083716639063 ◽

2016 ◽

Vol 47 (2) ◽

pp. 211-232 ◽

Cited By ~ 13

Author(s):

G Rajeshkumar ◽

V Hariharan ◽

TP Sathishkumar ◽

V Fiore ◽

T Scalici

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Dynamic Mechanical Properties ◽

Short Fiber ◽

Epoxy Composites ◽

Reinforced Composites ◽

Fiber Reinforced ◽

Absorption Properties ◽

Dynamic Mechanical ◽

Properties Of Composites

Phoenix sp. fiber-reinforced epoxy composites have been manufactured using compression molding technique. The effect of reinforcement volume content (0%, 10%, 20%, 30%, 40%, and 50%) and size (300 µm particles, 10 mm, 20 mm, and 30 mm fibers) on quasi-static and dynamic mechanical properties was investigated. Moreover, the water absorption properties of composites were analyzed at different environmental conditions (10℃, 30℃, and 60℃). For each reinforcement size, composites loaded with 40% in volume show highest tensile and flexural properties. Furthermore, composites with 300 µm particles present the best impact properties and the lowest water absorption, regardless of the environmental condition. The dynamic mechanical properties of the composites loaded with 40% in volume were analyzed by varying the reinforcement size and the load frequency (i.e., 0.5 Hz, 1 Hz, 2 Hz, 5 Hz, and 10 Hz). It was found that the glass transition temperature of short fiber-reinforced composites is higher than that of the composite loaded with particles.

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Study and evaluation of the mechanical properties on sawdust reinforced epoxy composite

World Journal of Engineering ◽

10.1108/wje-04-2021-0211 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Shailendra Singh Chauhan ◽

Vaibhav Singh ◽

Gauranshu Saini ◽

Nitin Kaushik ◽

Vishal Pandey ◽

...

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Epoxy Composite ◽

Research Work ◽

Processing Parameters ◽

Epoxy Composites ◽

Green Composite ◽

Absorption Properties ◽

Content Type ◽

The Impact

Purpose The growing environmental awareness all through the world has motivated a standard change toward planning and designing better materials having good performance, which are very much suited to the environmental factors. The purpose of this study is to investigate the impact on mechanical, thermal and water absorption properties of sawdust-based composites reinforced by epoxy, and the amount of sawdust in each form. Design/methodology/approach Manufacturing of the sawdust reinforced epoxy composites is the main area of the research for promoting the green composite by having good mechanical properties, biodegradability or many applications. Throughout this research work, the authors emphasize the importance of explaining the methodology for the evaluation of the mechanical and water absorption properties of the sawdust reinforced epoxy composites used by researchers. Findings In this paper, a comprehensive review of the mechanical properties of sawdust reinforced epoxy composite is presented. This study is reported about the use of different Wt.% of sawdust composites prepared by different processes and their mechanical, thermal and water absorption properties. It is studied that after optimum filler percentage, mechanical, thermal properties gradually decrease, but water absorption property increases with Wt.% of sawdust. The changes in the microstructure are studied by using scanning electron microscopy. Originality/value The novelty of this study lies in its use of a systematic approach that offers a perspective on choosing suitable processing parameters for the fabrication of composite materials for persons from both industry and academia. A study of sawdust reinforced epoxy composites guides new researchers in the fabrication and characterization of the materials.

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