Effects of thermal cycling on physical and tensile properties of injection moulded kenaf/carbon nanotubes/polypropylene hybrid composites

Razak, Zakaria; Sulong, Abu Bakar; Muhamad, Norhamidi; Haron, Che Hassan Che; Radzi, Mohd Khairul Fadzly Md; Ismail, Norfarah Nadia; Tholibon, Dulina; Tharazi, Izdihar

doi:10.1016/j.compositesb.2018.12.031

Cited by 26 publications

(16 citation statements)

References 17 publications

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“…By comparison, the kenaf/PP composites experienced an unstable structure when the temperature increased above 80 • C [25,26]. As shown in Figure 2, at the temperature range of 60 to 120 • C, the kenaf/PP composites were able to achieve a maximal tensile strength that ranged from 70 to 90 MPa, which is sufficient for automotive parts (e.g., a trunk cover or dashboard) that require a tensile strength of around 30 MPa [2,15]. These findings indicated that kenaf/PP composites are appropriate to be used, given that the applied temperature (60 to 120 • C) was near that of other commercial composite products used in high-temperature applications that can offer better mechanical properties [18].…”

Section: Characterizationmentioning

confidence: 99%

“…Previous studies demonstrated that, by using kenaf-fiber-reinforced epoxy resin and aligning the fibers in a particular direction (0° to 90°), their mechanical properties could be improved without using any surface treatment. Moreover, by diminishing the surface-treatment procedure, a more affordable and time-effective manufacturing process could be introduced [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

et al. 2020

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Automotive parts, including dashboards and trunk covers, are now fabricated through a compression-molding process in order to produce lightweight products and optimize fuel consumption. However, their mechanical strength is not compromised to avoid safety issues. Therefore, this study investigates kenaf-fiber-reinforced polypropylene composites using a simple combing approach to unidirectionally align kenaf fibers at 0°. The kenaf composite was found to withstand a maximal temperature of 120 °C. The tensile and flexural strengths of the aligned kenaf composites (50 and 90 MPa, respectively) were three times higher than those of the commercialized Product T (between 39 and 30.5 MPa, respectively) at a temperature range of 90 to 120 °C. These findings clearly showed that the mechanical properties of aligned kenaf fibers fabricated through the combing technique were able to withstand high operating temperatures (120 °C), and could be used as an alternative to other commercial natural-fiber products.

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Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

et al. 2020

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“…A short fiber from the kenaf plant (core part) can increase the mechanical strength of PP of up to 60% [ 2 ]. Besides, our series of studies demonstrated that short kenaf fiber-reinforced composites produced by injection molding can achieve substantial physical and mechanical performance in the form of fiber-reinforced polymer composites [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…Many of our previous studies reported the effect of kenaf filler and MWCNT addition in the enhancement of physical and mechanical properties of the composites [ 3 , 11 ]. The optimization of injection molding parameters was also reported in our previous studies [ 2 , 13 ], in which we particularly found the properties of this composite to be fascinating.…”

Section: Introductionmentioning

confidence: 99%

Influence of Multiwalled Carbon Nanotubes on the Rheological Behavior and Physical Properties of Kenaf Fiber-Reinforced Polypropylene Composites

et al. 2020

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The incorporation of kenaf fiber fillers into a polymer matrix has been pronounced in the past few decades. In this study, the effect of multiwalled carbon nanotubes (MWCNTs) with a short kenaf fiber (20 mesh) with polypropylene (PP) added was investigated. The melt blending process was performed using an internal mixer to produce polymer composites with different filler contents, while the suitability of this melt composite for the injection molding process was evaluated. Thermogravimetric analysis (TGA) was carried out to investigate the thermal stability of the raw materials. Rheological analyses were conducted by varying the temperature, load factor, and filler content. The results demonstrate a non-Newtonian pseudoplastic behavior in all samples with changed kenaf fillers (10 to 40 wt %) and MWCNT contents (1 to 4 wt %), which confirm the suitability of the feedstock for the injection molding process. The addition of MWCNTs had an immense effect on the viscosity and an enormous reduction in the feedstock flow behavior. The main contribution of this work is the comprehensive observation of the rheological characteristics of newly produced short PP/kenaf composites that were altered after MWCNT additions. This study also presented an adverse effect on the composites containing MWCNTs, indicating a hydrophilic property with improved water absorption stability and the low flammability effect of PP/kenaf/MWCNT composites. This PP/kenaf/MWCNT green composite produced through the injection molding technique has great potential to be used as car components in the automotive industry.

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“…Kenaf fibre offers many added advantages in term of low density with higher specific strength and stiffness [11]. Also, it benefits in term of low hazard during the manufacturing processes and low emissions of toxic fumes when subject to heat.…”

Section: Introductionmentioning

confidence: 99%

Kenaf Composites for Automotive Components: Enhancement in Machinability and Moldability

et al. 2019

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To date, the mechanical performance of kenaf composites is still unsatisfied in term of its mechanical performance. Therefore, research focuses on kenaf composites fabrication through the selection of polymer resin, including epoxy, polypropylene, and polylactic acid. The incorporated kenaf fibre at 10 wt % to 40 wt % loadings was conducted using injection and a compression moulding process. The compressed materials indicated high tensile strength at 240 MPa compared to inject materials (60 MPa). Significant improvement on impact strength (9 kJ/m2) was due to the unpulled-out fibre that dispersed homogenously and hence minimize the microcrack acquire. Meanwhile, high flexural strength (180 MPa) obtained by kenaf/epoxy composites due to the fibre orientate perpendicular to the loading directions, which improve its mechanical properties. The findings indicate that the kenaf fibre reinforced thermoset materials exhibit better mechanical properties as a function to the battery tray applications.

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Effects of thermal cycling on physical and tensile properties of injection moulded kenaf/carbon nanotubes/polypropylene hybrid composites

Cited by 26 publications

References 17 publications

Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

Influence of Multiwalled Carbon Nanotubes on the Rheological Behavior and Physical Properties of Kenaf Fiber-Reinforced Polypropylene Composites

Kenaf Composites for Automotive Components: Enhancement in Machinability and Moldability

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