Effects of water absorption on the mechanical properties of hybrid natural fibre/phenol formaldehyde composites

Sanjeevi, Sekar; Shanmugam, Vigneshwaran; Kumar, Suresh; Velmurugan, G.; Sas, Gabriel; Johnson, Deepak Joel; Shanmugam, Manojkumar; Athijayamani, A.; Naresh, K.; Neisiany, Rasoul Esmaeely; Das, Oisik

doi:10.1038/s41598-021-92457-9

Cited by 148 publications

(87 citation statements)

References 45 publications

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“…As discussed earlier, the susceptibility of natural fiber-based composites to moisture/water has been well reported in the literature for different matrices [ 7 , 8 , 9 , 10 , 11 , 34 , 35 ]. Recently, Sanjeevi et al [ 35 ] have reported that for a hybrid phenol formaldehyde system with Areca fine fibers and Calotropis Gigantea fibers, the higher the natural fiber content in the composite, the higher was the water absorption rate. They have noted a 4.3% water absorption with 45 wt.% of fiber loading.…”

Section: Resultsmentioning

confidence: 88%

Development and Characterization of Natural-Fiber-Based Composite Panels

Nair

Dasari

2022

Polymers

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The emphasis on sustainability in materials related to the construction and transportation sectors has renewed interest in the usage of natural fibers. In this manuscript, a different perspective is taken in adopting oil palm fibers (OPF) to develop composite panels and understand their acoustic, mechanical, and water susceptibility (including warm water analysis) properties to provide an insight into the potential of these panels for further exploration. The binder for these composite panels is a water-based acrylic resin, and for reinforcement purposes, fly ash and other metal oxides are used. It is shown that the presence of fibers positively influences the acoustic absorption coefficient in the critical mid-frequency range of 1000–3000 Hz. Even the noise reduction coefficient values highlighting the octave band are higher by more than 50% in the presence of fibers as compared to traditional refractory boards. Quasistatic indentation and drop-weight tests have also highlighted the excellent performance of the composite panels developed in this work. Though the water immersion tests on composite panels and subsequent analysis showed relatively minor changes in their performance, the immersion of the panels in caustic warm water for 56 days has resulted in their severe degradation with a loss of more than 65% in flexural strength.

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Section: Resultsmentioning

confidence: 88%

Development and Characterization of Natural-Fiber-Based Composite Panels

Nair

Dasari

2022

Polymers

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“…[ 61–65 ] Hybrid composites were used to reduce the higher moisture absorption and also to increase the mechanical properties. [ 66–69 ]…”

Section: Introductionmentioning

confidence: 99%

Solid particle erosion, water absorption and thickness swelling behavior of intra ply Kevlar/PALF fiber epoxy hybrid composites

et al. 2022

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In this investigation, the different weaving pattern of intra ply Kevlar and pineapple leaf fiber (PALF) reinforced with epoxy hybrid composites was fabricated using the compression molding method. Solid particle erosion wear properties, water absorption, and thickness swelling behavior were tested. Solid particle erosion wear properties were tested using an air‐jet erosion tester. The various factors for solid particle erosion test were taken as impingement angle, exposure time, and weaving pattern. The weaving pattern was varied as plain type, twill type, basket type. The result showed that basket weave type and pure Kevlar fiber reinforced epoxy composites have better water absorption and thickness swelling properties. The results from the solid particle erosion test indicated that twill type and pure Kevlar fiber reinforced epoxy composites showed superior erosion wear resistance compared to other composites. Further, the statistical analysis was carried out using Taguchi analysis and their results showed that twill type Kevlar/PALF reinforced with epoxy composite was a minimum erosion wear rate at 90° of impingement angle and 6 min exposure time. The erosion mechanism of the surface eroded composite specimens was investigated using scanning electron microscopy.

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“…The mechanical properties of the fibre-reinforced composites could be modified on the basis of requirements by altering the fibre-resin-filler combination [18]. The renewable, cheap, non-abrasive nature of jute-fibre makes it an attractive option for use as reinforcement in composites.…”

Section: Introductionmentioning

confidence: 99%

Optimisation of Mechanical Properties in Saw-Dust/Woven-Jute Fibre/Polyester Structural Composites under Liquid Nitrogen Environment Using Response Surface Methodology

et al. 2021

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Natural fibre-based composites are replacing traditional materials in a wide range of structural applications that are used in different environments. Natural fibres suffer from thermal shocks, which affects the use of these composites in cold environment. Considering these, a goal was set in the present research to investigate the impact of cryogenic conditions on natural fibre composites. Composites were developed using polyester as matrix and jute-fibre and waste Teak saw-dust as reinforcement and filler, respectively. The effects of six parameters, viz., density of saw-dust, weight ratio of saw-dust, grade of woven-jute, number of jute layers, duration of cryogenic treatment of composite and duration of alkaline treatment of fibres on the mechanical properties of the composite was evaluated with an objective to maximise hardness, tensile, impact and flexural strengths. Taguchi method was used to design the experiments and response-surface methodology was used to model, predict and plot interactive surface plots. Results indicated that the duration of cryogenic treatment had a significant effect on mechanical properties, which was better only up to 60 min. The models were found to be statistically significant. The study concluded that saw-dust of density 300 kg/m3 used as a filler with a weight ratio of 13 wt.% and a reinforcement of a single layer of woven-jute-fibre mat of grade 250 gsm subjected to alkaline treatment for 4 h in a composite that has undergone 45 min of cryogenic treatment presented an improvement of 64% in impact strength, ca. 21% in flexural strength, ca. 158% in tensile strength and ca. 28% in hardness.

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Effects of water absorption on the mechanical properties of hybrid natural fibre/phenol formaldehyde composites

Cited by 148 publications

References 45 publications

Development and Characterization of Natural-Fiber-Based Composite Panels

Development and Characterization of Natural-Fiber-Based Composite Panels

Solid particle erosion, water absorption and thickness swelling behavior of intra ply Kevlar/PALF fiber epoxy hybrid composites

Optimisation of Mechanical Properties in Saw-Dust/Woven-Jute Fibre/Polyester Structural Composites under Liquid Nitrogen Environment Using Response Surface Methodology

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