Mechanical properties of abaca fiber reinforced polypropylene composites: Effect of chemical treatment by benzenediazonium chloride

Punyamurthy, Ramadevi; Sampathkumar, Dhanalakshmi; Ranganagowda, Raghu Patel G.; Bennehalli, Basavaraju; Srinivasa, C. V.

doi:10.1016/j.jksues.2015.10.004

Cited by 61 publications

(35 citation statements)

References 26 publications

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“…Mechanical interlocking of the exposed crystalline cellulose in the NaOH-treated coir fibre to the epoxy resin led to better fibre-matrix interfacial adhesion in the NaOHtreated coir fibre composites. Moreover, the removal of the hydroxyl groups in the NaOH-treated coir fibres reduces its hydrophilic nature and provides better compatibility of fibre to the matrix (Akhtar et al 2016;Brígida et al 2010;Kabir et al 2012;Li et al 2007;Punyamurthy et al 2017;Zaman & Beg 2014). In order to confirm the removal of the amorphous non-cellulose constituents from the coir fibres, FTIR spectroscopy was used to investigate the structural changes in the coir fibres surface before and after alkaline treatment.…”

Section: Water Absorption Testmentioning

confidence: 99%

“…Due to the hydrophilic nature of natural fibres and hydrophobic nature of polymer matrices, low compatibility between the fibre-matrix leads to poor wettability of the natural fibres to the polymer matrices. Poor interfacial adhesion between the natural fibres and polymer matrices degrades the mechanical properties and the moisture resistance of the composites, thus limits the further application of natural fibre composites (Akhtar et al 2016;Punyamurthy et al 2017;Qian et al 2015;Zhang et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Alkaline Treatment on Structural Characterisation, Thermal Degradation and Water Absorption Ability of Coir Fibre Polymer Composites

Yew¹,

Muhamad²,

Mohamed³

et al. 2019

JSM

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The alkaline treatment with 5 wt. % sodium hydroxide (NaOH) solution at room temperature for 24 and 48 h was performed on coir fibre. The structural characterisation, thermal degradation and water absorption ability of the untreated and NaOH-treated coir fibre polymer composites have been studied. Scanning electron microscope (SEM) images showed that coir fibres treated with NaOH have rough surface texture and the roughness of the fibre surface becomes significant as the duration of the NaOH treatment increased. Fourier transform infrared (FTIR) spectra confirmed that NaOH treatment removed hemicelluloses as evidenced by the absence of absorption bands at 1724.36 cm-1 and changes the absorption intensity at bands 1244.09 cm-1 and 1249.87 cm-1 due to the loss of lignin. NaOH-treated coir fibre composites demonstrated better thermal stability at low temperature degradation. At high temperature, the thermal stability was reduced due to the decreased of residual lignin content. The water absorption of the NaOH-treated coir fibre composites was lower than untreated coir composite contributed by better interfacial adhesion between the NaOH-treated coir fibre to epoxy resin.

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Section: Water Absorption Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Alkaline Treatment on Structural Characterisation, Thermal Degradation and Water Absorption Ability of Coir Fibre Polymer Composites

Yew¹,

Muhamad²,

Mohamed³

et al. 2019

JSM

View full text Add to dashboard Cite

show abstract

“…[1,2,3,4]. For example, abaca fibers have been widely studied as a reinforcement in cement [5], polypropylene [6,7] and epoxy [8] matrices, among others.…”

Section: Introductionmentioning

confidence: 99%

Chemical Treatment of Waste Abaca for Natural Fiber-Reinforced Geopolymer Composite

2017

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The use of natural fibers in reinforced composites to produce eco-friendly materials is gaining more attention due to their attractive features such as low cost, low density and good mechanical properties, among others. This work thus investigates the potential of waste abaca (Manila hemp) fiber as reinforcing agent in an inorganic aluminosilicate material known as geopolymer. In this study, the waste fibers were subjected to different chemical treatments to modify the surface characteristics and to improve the adhesion with the fly ash-based geopolymer matrix. Definitive screening design of experiment was used to investigate the effect of successive chemical treatment of the fiber on its tensile strength considering the following factors: (1) NaOH pretreatment; (2) soaking time in aluminum salt solution; and (3) final pH of the slurry. The results show that the abaca fiber without alkali pretreatment, soaked for 12 h in Al2(SO4)3 solution and adjusted to pH 6 exhibited the highest tensile strength among the treated fibers. Test results confirmed that the chemical treatment removes the lignin, pectin and hemicellulose, as well as makes the surface rougher with the deposition of aluminum compounds. This improves the interfacial bonding between geopolymer matrix and the abaca fiber, while the geopolymer protects the treated fiber from thermal degradation.

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“…From the spectra it can be seen that the pure composite displays spectral peaks corresponding to the conjunctive functional groups of Vinyl ester resin and Abaca fabric. [20,21] HMDS modified VE/AF composite also shows a similar trend in the % of transmittance by displaying similar peaks as compared to the pure composite. However, due to the presence of HMDS, new peaks are formed in the spectra which prove physical interaction of the silane modifier between the matrix and the fabric.…”

Section: Results and Discussion 31 | Spectral Analysismentioning

confidence: 58%

Influence of silane‐modified Vinyl ester on the properties of Abaca fiber reinforced composites

et al. 2017

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The versatility of the fiber reinforced composites has significantly replaced some of the sophisticated metal components in certain sectors of industries. The matrix could be altered to improve self-properties via silane modifiers by forming chemical linkages with the matrix in harmony with the reinforcing agents. This research work is an endeavor to enhance the traits of Vinyl ester by scrutinizing the influence of silane chemical agents using Hexamethyldisiloxane (HMDS). The dispersion time and concentration of these chemicals in matrix were optimized and henceforth a natural reinforcement, Abaca fabric was incorporated to constitute Natural fiber composite via Vacuum Assisted Resin Transfer Molding (VARTM) technique. The effect of resin modification on mechanical, thermal, and physical properties of Vinyl ester/Abaca (VE/AF) composite was examined. HMDS resin modified composite showed an improvement in the mechanical and flame retardant properties when compared to the pristine composite due to the formation of siloxane bonding which is compatible with the functional groups of both the matrix and the fabric. FT-IR and FESEM characterizations have showed imperative evidences to support the results. This investigation provides a channel for enhancing the properties of natural fiber composites via chemical modification technique. K E Y W O R D SAbaca fibers, flame retardancy, Hexamethyldisiloxane, mechanical properties, Vinyl ester

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Mechanical properties of abaca fiber reinforced polypropylene composites: Effect of chemical treatment by benzenediazonium chloride

Cited by 61 publications

References 26 publications

Effect of Alkaline Treatment on Structural Characterisation, Thermal Degradation and Water Absorption Ability of Coir Fibre Polymer Composites

Effect of Alkaline Treatment on Structural Characterisation, Thermal Degradation and Water Absorption Ability of Coir Fibre Polymer Composites

Chemical Treatment of Waste Abaca for Natural Fiber-Reinforced Geopolymer Composite

Influence of silane‐modified Vinyl ester on the properties of Abaca fiber reinforced composites

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