Development and mechanical characterization of microwave-cured thermoplastic based natural fibre reinforced composites

Singh, Manoj Kumar; Zafar, Sunny

doi:10.1177/0892705718799832

Cited by 46 publications

(31 citation statements)

References 26 publications

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“…Before the fabrication process, the kenaf fiber mat underwent treatment with a 10 wt% alkaline solution to remove the wax particles and enhance the surface roughness. 8 The fiber mats used in the experiment were of the plain weave pattern. The average diameter of the fiber and the strand was 0.5 mm and 0.02 mm, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Use of microwave energy to process a wide range of materials for various applications has been reported by several authors. [7][8][9][10][11][12][13][14][15][16][17][18][19] The study reported that microwave-assisted heating of nonmetals (polymers) involves the phenomenon of dipolar and conduction loss associated with electric field effect.…”

Section: Introductionmentioning

confidence: 99%

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Parametric optimization of laser drilling of microwave-processed kenaf/HDPE composite

Tewari

Singh

Zafar

et al. 2020

Polymers and Polymer Composites

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The present work focused on the investigation of hole quality characteristics in laser-drilled kenaf/high-density polyethylene (HDPE) composites. Microwave-assisted compression molding was used to fabricate kenaf/HDPE composite with 20 wt% of the kenaf fiber reinforcement. The two input parameters pertaining to the experimentation were laser power and cutting speed. Kerf taper angle, heat-affected zone (HAZ), and surface roughness were investigated to evaluate the surface quality and accuracy of the holes generated through laser drilling on composite specimens. The assessment of HAZ was performed qualitatively through image analysis on scanning electron micrographs. Additionally, the effect of composite thickness on laser drilling was also investigated for 3-, 6.7-, and 10-mm composite specimens. The central composite design was used to plan the experiments. The kenaf/HDPE composite drilled at power 120 W and speed 2 mm/s shows a minimum kerf taper angle and surface roughness of 0.056° and 3.83 ± 0.19 µm, respectively. Regression model was obtained for the establishment of relation between input variable parameters and responses. Experimental results and predicted model results exhibited good agreement with each other as they provide error less than 5.35%. The analysis of variance was carried out to obtain the significance of the model chosen for optimization of the output values, that is, surface roughness and kerf taper.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parametric optimization of laser drilling of microwave-processed kenaf/HDPE composite

Tewari

Singh

Zafar

et al. 2020

Polymers and Polymer Composites

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“…33 This can be attributed to the improved heating rate as microwave is a faster and volumetric heating route. 16 The flexural modulus of the foam specimen was calculated using the following equation 34 where F is the flexural load, L is the span length of the specimen, d is the displacement, b is the width of the specimen and h is the height of the specimen.…”

Section: Resultsmentioning

confidence: 99%

Section: Flexural Behaviourmentioning

confidence: 99%

“…Microwave energy has been used to join, clad, sinter, cast, drill, coat, glaze and cure a wide variety of materials. [8][9][10][11][12][13][14][15][16] Microwave material processing route has been established as a promising manufacturing route owing to its several advantages compared to the conventional manufacturing routes. In microwave material processing, direct internal heat generated and transfer through conventional modes into the volume, whereas in case of conventional heating heat is conducted from the surface of the material to its core.…”

Section: Introductionmentioning

confidence: 99%

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Development and characterisation of poly-L-lactide-based foams fabricated through microwave-assisted compression moulding

Singh

Zafar

Talha

2019

Journal of Cellular Plastics

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Poly-L-lactide (PLLA) reinforced with nano-hydroxyapatite (HA) foams were fabricated using a novel method of microwave-assisted compression moulding. The microwaveassisted compression moulding is novel processing route of polymer-based composites, owing to its faster and uniform heating, better temperature control, which yields improved mechanical properties. Porosity in the PLLAþHA foams was introduced through porogen leaching route. The reinforcement in the form of nanohydroxyapatite was added between 10 and 20 wt%. Porosity in the microwave processed foams was found in the range of 23-25%. The porosity in foams was observed to have homogeneously interconnected pores structure with narrower pore size distribution. The thermal behaviour of the developed foams was analysed using the thermogravimetric analysis and differential scanning calorimetry techniques. The glass transition temperature (T g) and percentage crystallinity of the foams were assessed using the thermogravimetric analysis and differential scanning calorimetric curves. The maximum percentage crystallinity of 36.28% was obtained in case of PLLA þ 15% HA foam. The mechanical characterisation of the microwave processed foams was carried out in terms of compressive and flexural behaviour. The foam with 20% HA reinforcement exhibited the maximum compressive strength (of the order of 21 MPa) and modulus of the order of

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Development and characterization of microwave‐processed linear low‐density polyethylene based sisal/jute hybrid laminates

Maurya,

Kumar,

Prasad

et al. 2024

Polymer Composites

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Natural fiber‐reinforced composites are gaining significant popularity for their biodegradability and eco‐friendliness. Fiber modifications and hybridization have been used to address issues like hydrophilicity and fiber inhomogeneity. However, efficient manufacturing is still a challenge for natural fiber‐reinforced polymer composites. The present study explores the potential of microwave processing of hybrid laminates composed of sisal and jute fibers. The laminates, consisting of linear low‐density polyethylene (LLDPE) as matrix and sisal and jute as reinforcement materials were subjected to microwave processing at specific power, time, frequency, and loads. Four types of laminates with different stacking sequences: sisal‐sisal‐sisal (SSS), sisal‐jute‐sisal (SJS), jute‐sisal‐jute (JSJ), and jute‐jute‐jute (JJJ) were developed. The developed composites showed ~3% void content, with the SJS and JSJ composite having the least and highest void content, respectively. The SJS composite showed the highest tensile and flexural strength of 15.27 and 20.40 MPa, respectively, out of all the configurations and an improvement of 42% and 85% over pure LLDPE. Hybrid composites having high‐strength fibers in the skin layer exhibited superior mechanical properties. Microscopic examination of the fractured specimens revealed that fiber pull‐out and fiber breakage were the primary failure mechanisms of failure. Lateral failure due to delamination between matrix and fiber was predominant with grip and gauge regions as frequent failure points. The incorporation of sisal and jute fiber reinforcement into the polymers doesn't change the thermal stability of the fabricated composites significantly. The above results show that microwave‐assisted processing is a promising method for producing natural fiber‐reinforced hybrid polymer composites.Highlights Development of hybrid laminates using microwave energy at 2.45 GHz. The mechanism of microwave‐based processing of polymer composites has been discussed. Effect of layering sequence on mechanical and thermal properties of the developed composite. Assessment of tensile strength with morphology, flexural strength and thermo‐gravimetric analysis.

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Development and mechanical characterization of microwave-cured thermoplastic based natural fibre reinforced composites

Cited by 46 publications

References 26 publications

Parametric optimization of laser drilling of microwave-processed kenaf/HDPE composite

Parametric optimization of laser drilling of microwave-processed kenaf/HDPE composite

Development and characterisation of poly-L-lactide-based foams fabricated through microwave-assisted compression moulding

Development and characterization of microwave‐processed linear low‐density polyethylene based sisal/jute hybrid laminates

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