Mechanical properties of epoxy-coated sodium hydroxide and silane treated kenaf/recycled polyethylene tereph-thalate (RPET) composites: Effect of chemical treatment

Owen, Macaulay M.; Ishiaku, U. S.; Danladi, Abdullahi; Dauda, Benjamin; Romli, Ahmad Zafir

doi:10.1063/1.5047159

Cited by 11 publications

(12 citation statements)

References 16 publications

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“…Other researchers have reported various significant improvements in mechanical properties with epoxy coated fibre filled engineering composites. 4,20,21,23 They concluded that flexible or diluted epoxy resin is considered useful for surface modification in enhancing the mechanical properties of natural fibre filled engineering thermoplastic polymer composites.…”

Section: Flexural Propertiesmentioning

confidence: 99%

“…These include natural kenaf fibres/high temperature engineering polyethylene terephthalate (PET) who pre-coated the fibres used in the preparation of their composites to improve the thermal resistance. 20,21 Furthermore, Saliu et al 22 incorporated epoxy coated-sodium hydroxide treated kenaf fibres into thermoplastics Acrylonitrile butadiene styrene (ABS) at processing temperature of 230°C and dynamically cured epoxy at high temperature (80°C) in order to prevent degradation. However, the researchers found that an optimum level of mechanical properties were obtained with epoxy coated fillers and concluded that epoxy coated bast kenaf fibre can be incorporated into higher temperature engineering thermoplastic ABS without degradation of the fibres.…”

Section: Introductionmentioning

confidence: 99%

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Effect of processing temperatures on the thermal and mechanical properties of leather waste-ABS composites

Owen

Achukwu

Arukalam

et al. 2021

Composites and Advanced Materials

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The effect of varying processing temperatures (200, 220 and 240°C) on the thermal and mechanical properties of uncoated and epoxy-coated chrome-tanned leather wastes-ABS composites has been studied. The results obtained showed that the mechanical properties of the composites decreased as the processing temperature increased. Epoxy-coated leather wastes fibre-ABS (CLWABS) composite yielded better mechanical properties compared to the uncoated leather wastes-ABS composite (LWABS). These results were obtained at an optimized processing temperature of 200°C. Furthermore, the results were confirmed by the field emission scanning electron microscopy (FESEM) studies. The differential scanning calorimetry (DSC) studies revealed that the epoxy-coated leather wastes fibres (CLW) showed higher onset and melting temperatures of 131.8 and 179.35°C than the uncoated leather wastes fibres (LW) with glass transition (Tg) and melting (Tm) temperatures of 128.2 and 169.4°C, respectively. When the LW and CLW fibres were mixed with Acrylonitrile butadiene styrene (ABS), the Tg and Tm of CLWABS composite were found to be 94.9 and 269.8°C, respectively, higher than the LWABS composite with Tg and Tm of 89.1 and 261.6°C, respectively. Thus, this study has demonstrated that utilization of epoxy-coated chrome-tanned leather wastes fibres as fillers in the design of ABS-based composites will help a great deal in addressing the problem of solid waste pollutants in our environment.

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Section: Flexural Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of processing temperatures on the thermal and mechanical properties of leather waste-ABS composites

Owen

Achukwu

Arukalam

et al. 2021

Composites and Advanced Materials

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“…It can be seen from Figure 5c,d in the previous section that in the C/MPBPR composites prepared by the hand‐coating process, MP is mostly distributed between the layers of carbon fiber cloth, and only a small amount of MP with small particle size can enter between the fibers. In addition, when preparing the composites, the resin content in the composites with different MP additions is maintained at about 40%, which means that the content of BPR in the system will continue to decrease with the increase of MP additions, the amount of resin impregnation between fibers is reduced 42 . As shown in Figure 9a, with the increase of MP addition, the interlaminar shear property of the composites at room temperature gradually decreases compared with that of the blank sample.…”

Section: Resultsmentioning

confidence: 95%

“…In addition, when preparing the composites, the resin content in the composites with different MP additions is maintained at about 40%, which means that the content of BPR in the system will continue to decrease with the increase of MP additions, the amount of resin impregnation between fibers is reduced. 42 As shown in Figure 9a, with the increase of MP addition, the interlaminar shear property of the composites at room temperature gradually decreases compared with that of the blank sample. This is mainly due to the reduction of resin impregnation between fiber tow, which reduces the effective transverse support between carbon fibers, and MP is filtered by carbon fiber tow during the composites molding process.…”

Section: Characteristics and Ablation Properties Of Fiber-reinforced ...mentioning

confidence: 92%

Enhanced ablation resistance of carbon/phenolic composites based on mesophase pitch reinforced particles

Yue,

Huang,

Zou

et al. 2023

J of Applied Polymer Sci

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Phenolic resin (PR)‐based composites are the main materials used in thermal protection system (TPS) at present. However, the low graphitization degree of the char layer formed by PR easily leads to cracks and other defects. In this study, carbon/phenolic composites were modified by mesophase pitch (MP) to improve the structural strength, fracture toughness and crack propagation resistance. The ablation rate was significantly decreased after MP modification compared with the blank sample. With the increase of MP, the size of cracks and char blocks on the ablation center of the composites were reduced, and the surface was flat and dense. The Interlaminar shear strength (ILSS) of carbonized composites (5 wt% MP) were 9.79 MPa, and the flexural strength was 121.5 MPa, which improved 62.9% and 40.8% relative to the pure sample. The flexural strength of 5 wt% MP‐reinforced carbon/phenolic composites reached 525.6 MPa, which was 26.9% higher than that of pure carbon/phenolic composites, mainly due to the particle reinforcement effect of MP distributed between carbon fibers. The above results show that the carbon/phenolic composites modified by MP has great application prospects in the field of aircraft thermal protection.

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“…Recently, the trend of combining of these chemical treatments (coalition) have getting more attention since this method has the capability of providing a synergistic effects in enhancing the properties of the composites [17][18][19][20][21]. According to [17,22,23], the treatment of the natural fibre with the Sodium Hydroxide (NaOH) followed by the Silane treatment (threeaminopropyltriethoxysilane) had significantly improve the tensile, flexural and impact properties due to better adhesion between the fibre and the matrix.…”

Section: Introductionmentioning

confidence: 99%

Sodium Hydroxide/Silane Treated Kenaf Fibre in Unsaturated Polyester Matrix: Effects of Fibres Length and Fibres Loading Towards The Composites Flexural and Morphological Properties

Ghaztar¹,

Ibrahim²,

Romli³

2022

JMechE

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The fibre behaviour is a critical aspect that will determine the deformation of the composite since it highly relies on its physical and chemical properties. This paper focus on the effect of similar fibres aspect ratio (L/D) with different length of untreated Kenaf fibre and SodiumHydroxide/silane treated Kenaf fibres on the flexural properties of the composites. The treated and untreated kenaf fibre at two different fibre lengths (A: 0.4 cm and B: 2.9 cm) were fabricated at low filler loadings (5,10,15%) and high filler loadings (45,50,55%). The results showed an improvement in the flexural stress (7-44 %) and modulus (6-46 %) with the application of treatments for both A- and B- fibre categories. The optimum result was achieved from the treated samples at a shorter A-fibre composite, although the aspect ratio between A and B-fibre samples are similar. The chemical treatment coalition might improve the surface interaction and, at shorter fibre length, it affects the fibres compact-ability that led to an improvement in stress distribution and low voids formation as supported by the observation on the composite's fractured surface where traces of matrix observed on the surface of pull-out fibres. From the fractographic analysis, the fibres morphological condition before the fabrication is one of the important factors to consider since it can affect the end-properties of the composites.

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Mechanical properties of epoxy-coated sodium hydroxide and silane treated kenaf/recycled polyethylene tereph-thalate (RPET) composites: Effect of chemical treatment

Cited by 11 publications

References 16 publications

Effect of processing temperatures on the thermal and mechanical properties of leather waste-ABS composites

Effect of processing temperatures on the thermal and mechanical properties of leather waste-ABS composites

Enhanced ablation resistance of carbon/phenolic composites based on mesophase pitch reinforced particles

Sodium Hydroxide/Silane Treated Kenaf Fibre in Unsaturated Polyester Matrix: Effects of Fibres Length and Fibres Loading Towards The Composites Flexural and Morphological Properties

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