Advanced natural fibre-based fully biodegradable and renewable composites and nanocomposites: a comprehensive review

Naghdi, Reza

doi:10.1080/20426445.2021.1945180

Cited by 14 publications

(6 citation statements)

References 105 publications

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“…81 Furthermore, the alkali-induced fibrillation in PMBA composites could increase fiber surface areas bonding with the other composite components (i.e., compatibilizer and polypropylene). [82][83][84][85] There is a marked difference in the fracture surfaces of PMBANc composites with those of the other composite formulations (Figure 3(d)). The whole surface is fairly uniform and smooth showing a good fiber-polymer wetting.…”

Section: Morphological Analysismentioning

confidence: 99%

Effects of nanoclay cloisite 20A and alkali treatments on structure-property relationships of bagasse/recycled polypropylene nanocomposites

Nejat

Naghdi

Nadali

et al. 2023

Journal of Thermoplastic Composite Materials

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This study was aimed at evaluating the individual and combined effects of organically modified nanoclay cloisite 20A and alkali treatments on the valorization of totally waste-based bagasse fiber/recycled polypropylene nanocomposites. FTIR spectra indicated the reduction of bagasse fibers’ hydroxyl moieties due to hemicellulose removal resulting from alkali treatment. There were also trace diminutions in C-O peak intensities due to the degradation of little amounts of lignin. X-ray Scattering revealed the intercalation of nanoclay in the polymer matrix. The improved interaction of fiber-polymer interfaces brought about by alkali treatment was also confirmed by scanning electron microscopy. The physical properties of the nanocomposites were improved due to the barrier properties of nanoclay against water ingress. The flexural strength and modulus of elasticity increased by both individual and combined treatments; however, the impact strength decreased by the individual treatments. Thermogravimetric analysis demonstrated that the temperatures of first and second stages of composites’ thermal degradation increased due to the treatments via the formation of a carbonized char layer thermally insulating the deeper composite layers. Differential scanning calorimetry showed some slight increases in the melting temperature, melting enthalpy, crystallisation temperature, crystallisation enthalpy, and crystallinity index of the treated composite formulations due to the nucleating effect of nanofillers. The overall results confirmed that the combination of nanoclay cloisite 20A and NaOH treatments could significantly improve the overall properties of the studied composites. This was due to some interesting synergistic effects of the given treatments on the nanocomposites converting the bagasse/recycled PP composites to high performance materials of choice.

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Section: Morphological Analysismentioning

confidence: 99%

Effects of nanoclay cloisite 20A and alkali treatments on structure-property relationships of bagasse/recycled polypropylene nanocomposites

Nejat

Naghdi

Nadali

et al. 2023

Journal of Thermoplastic Composite Materials

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“…Nowadays, sound absorption made from natural materials has received increasing attention because of their low density, high porosity, environmental friendliness, recyclable nature, minimal health impacts, and low cost [9][10][11]. The natural materials have hollow structures to act as sound absorbers [7].…”

Section: Introductionmentioning

confidence: 99%

Flame retardant sound absorbing panel made from bamboo charcoal and natural kaolin clay

Touchpong Janlee,

Nawadee Srisiriwat

2024

IJNeaM

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As noise pollution affects mental and physical health, sound absorbing panels are used to reduce noise pollution problems, especially the use of natural materials instead of synthetic materials in the fabrication of sound absorbing panels. Bamboo charcoal and natural kaolin clay were applied for eco-friendly flame retardant sound absorbing panels. The appropriate ratio of natural materials for forming sound absorbing panels to obtain the maximum sound absorption ability was investigated. In addition, the effects of the mixture ratios and thicknesses of sound absorbing panels on sound absorption, mechanical properties, and flame resistance were studied. The noise reduction coefficient (NRC) was determined according to ISO 354:2006 and ASTM C 423. At a thickness of 7 mm, the mixture materials obtained the highest sound absorption coefficient of 0.4 with a weight ratio of bamboo charcoal: natural kaolin: water: latex compound of 97: 3: 200: 50, respectively. It also has properties with a density of 327.62 kg/m3, a water absorption value of 9.14%, and a maximum tensile strength of 453.66 N, according to TIS 535-2527. The microstructural characteristics of the fabricated sound absorbing panel were investigated using scanning electron microscopy, which revealed good adhesion and high porosity. The flammability tests were performed according to ASTM D3801 and ASTM D635 for the vertical and horizontal positions, respectively. The appropriate mixture ratios presented for vertical burning obtained a V-0 classification, and horizontal burning obtained an HB classification. The flame retardant sound absorbing panel made from natural materials, including bamboo charcoal as a sound absorber and natural kaolin clay as a sound absorbing support, can be achieved because when it is ignited, it turns into ashes that can assist in extinguishing the fire by itself and not spread the flame. Bamboo charcoal powder and natural kaolin clay showed good performance for both sound absorption and flame retardancy. These are the natural alternative materials that can be used to develop commercial flame retardant sound absorbing panels.

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“…This in turn would interpret the progressive utilization of the nanocomposites as they introduce completely different and better mechanical properties than those of conventional materials [9]. However, natural fibers in nanocomposites, on the other hand, make the structure more cost-effective and environmentally friendly [10].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Performance of Hybrid Composites through the Addition of Zinc Oxide and Carbon Fibers

A. Nawi,

Mohamed,

Rajab

et al. 2024

DJES

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Hybrid composite materials combining polymers and reinforcements are gaining interest for enhanced engineering properties. The main goal of this study was to create the best hybrid composite using carbon fibers, zinc oxide micro- and nanoparticles, epoxy, phenol-formaldehyde resin, and more. Samples with varying ratios of epoxy resin (50–100%) and phenol-formaldehyde resin (0–50%) were fabricated. Mechanical and water absorption testing evaluated the effects of the zinc oxide particles and carbon fibers on tensile strength, elasticity, and liquid resistance. Results showed improved tensile strength and minimized water absorption at 10% phenol resin content. Further, zinc oxide nanoparticles offered better reinforcement than microparticles, attributed to higher surface area-to-volume ratios. However, carbon fiber addition increased water absorption despite improving tensile properties. In the end, the best composite was made up of carbon fibers, zinc oxide nanoparticles, 90% epoxy resin, and 10% phenol-formaldehyde resin. This affordable hybrid composite has potential applications in sewage system piping. Further work should focus on improved mixing methods to leverage synergies between the composite constituents. The study provides valuable insights into tuning hybrid composites with nanoparticles and fibers for advanced functionality.

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Advanced natural fibre-based fully biodegradable and renewable composites and nanocomposites: a comprehensive review

Cited by 14 publications

References 105 publications

Effects of nanoclay cloisite 20A and alkali treatments on structure-property relationships of bagasse/recycled polypropylene nanocomposites

Effects of nanoclay cloisite 20A and alkali treatments on structure-property relationships of bagasse/recycled polypropylene nanocomposites

Flame retardant sound absorbing panel made from bamboo charcoal and natural kaolin clay

Enhancing the Performance of Hybrid Composites through the Addition of Zinc Oxide and Carbon Fibers

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