<i>Cissus Populnea</i>
            Fiber - Unsaturated Polyester Composites: Mechanical Properties and Interfacial Adhesion

Azeez, Taofik Oladimeji; Onukwuli, Dominic O.; Nwabanne, Joseph Tagbo; Banigo, Alma Tamunonengiofori

doi:10.1080/15440478.2018.1558159

Cited by 23 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The untreated LSF impact tested PMC specimen in Figure 6(h) exhibits the presence of cavities between the fiber–matrix interface and is the primary cause of the impact failure of the specimen. The impact strength is lower in this case because of the high level of adhesion of fiber–matrix (Azeez et al , 2020).…”

Section: Resultsmentioning

confidence: 96%

“…The tensile strength in Figure 3(a) is observed to be strongly affected by the fiber weight concentration with the peak value of 17.072 MPa reaching at 7 wt.% concentration. This is the resultant effect of improved matrix–fiber adhesion (Azeez et al , 2020), which accompanies increased fiber concentration of and fiber length of 17 mm. The tensile strength falls beyond this critical level because of the increased interference in the bonding of matrix and fiber reinforcement.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Optimization and characterization of surface treated Lagenaria siceraria fiber and its reinforcement effect on epoxy composites

Saravanan¹,

Bharathiraja

et al. 2022

PRT

View full text Add to dashboard Cite

Purpose This paper aims to investigate the resultant optimal ultimate tensile strength, elongation, flexural strength and modulus, compression strength and impact strength of fabricated alkali-treated Lagenaria siceraria fiber (LSF)-reinforced polymer matrix composite by optimizing input factors and microstructural characterization by influencing fiber length, fiber concentration and treatment condition of LSF. Design/methodology/approach The fabrication of LSF-reinforced composite specimens involved surface treatment followed by custom experimental design using a simple hand layup process. The wear analysis was performed by a multi-tribotester TR25 machine, and the developed model was validated by using statistical software Design Expert V.8 and analysis of variance (ANOVA). The surface morphology of the sample was also analyzed by field emission scanning electron microscopy. Findings The alkali treatment for LSFs had reduced the hemicellulose, and enhanced mechanical performance was observed for 30 wt.% concentration of L. siceraria in epoxy resin. Thermogravimetric analysis revealed thermal stability up to 245°C; microstructure revealed fiber entanglements in case of longer fiber length and compression strength reduction; and the surface-treated fiber composites exhibited reduced occurrences of defects and enhanced matrix–fiber bonding. Enhanced mechanical performances were observed, namely, ultimate tensile strength of 17.072 MPa, elongation of 1.847%, flexural strength of 50.4 MPa, flexural modulus of 3,376.31 GPa, compression strength of 52.154 MPa and impact strength of 0.53 joules. Originality/value The novel approach of optimizing and characterizing alkali surface-treated LSF-reinforced epoxy matrix composite was explored, varying fiber length and concentrations for specimens by empirical relations and experimental design to obtain optimal performance validated by ANOVA. Enhanced properties were obtained for: 7 mm fiber length and 30 wt.% concentration of fiber in the composite for alkali-treated fiber.

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Optimization and characterization of surface treated Lagenaria siceraria fiber and its reinforcement effect on epoxy composites

Saravanan¹,

Bharathiraja

et al. 2022

PRT

View full text Add to dashboard Cite

show abstract

“…The water retting procedure described by Azeez & Onukwuli [11] was used to extract plantain fibres from the plantain bast. The fibres were modified using sodium hydroxide with a range of 5 -25% and 30 -150 minutes for concentration and time, respectively.…”

Section: Extraction Modification and Optimization Of Process Conditio...mentioning

confidence: 99%

Optimization, Sodium Hydroxide and Plantain Fibres: Mechanical Properties of Unsaturated Polyester Composites for Transtibial Prosthetic Socket

Nwaiwu,

Ekezie,

Azeez

et al. 2024

KEM

View full text Add to dashboard Cite

Low mechanical behaviors of natural fibres in the reinforcement of polymer composites have remain an issue of concern. This study is aimed at investigating the effect of NaOH treatment on the mechanical properties of plantain fiber for the transtibial prosthetic sockets made of polyester resin. Plantain fiber was extracted from the plantain bast using water retting techniques. The fibres were modified using alkaline treatment method of 5 – 25% for variable time of 30 to 150 minutes. It was optimized using 3-level Factorial design (3-LCD) of response surface methodology based on tensile properties of treated fibres. The polyester composites of plantain and glass fibers were prepared using hand-layup techniques. Instron Universal testing machine-3369 model was used to determine the tensile and impact properties of fibers and polyester composites. Rockwell hardness tester-RBHT/S-39 model was used to determine the hardness property. The optimum process conditions of 5 % NaOH for 119 minutes improved plantain fiber tensile strength, modulus, strain, energy, and extension by improved by 102.03, 208.07, 9.70, 210.52 and 205.73 %, respectively. The ultimate tensile strength and modulus was obtained at 10 and 12.5% fiber loading. The hardness and impact strength of NaOH modified unsaturated polyester composites was marginally more than 3.51 and 10.69% of glass fiber reinforced unsaturated composites, respectively, at 12.5% fiber loading. FTIR analysis revealed the improvement in mechanical properties. Thus, NaOH modified plantain fiber unsaturated polyester composites serves as a better alternative for making transtibial prosthetic socket.

show abstract

“…In order to improve the adhesion property of fibers, surface modification should be carried out using appropriate chemicals (Thakur, Thakur, & Gupta, 2013;Pappu et al, 2015). The modifications can be achieved via alkaline treatment, grafting with malic anhydride copolymer, using a saline coupling agent, permanganate treatment and acetylation treatment (Azeez, Onukwuli, Nwabanne, & Banigo, 2020;Government et al, 2019;Onukwuli & Ikezue, 2014). It was recorded that single fiber tensile testing conducted on untreated and treated PALF showed the ultimate tensile strength (UTS).…”

Section: Introductionmentioning

confidence: 99%

“…, 2015). The modifications can be achieved via alkaline treatment, grafting with malic anhydride copolymer, using a saline coupling agent, permanganate treatment and acetylation treatment (Azeez, Onukwuli, Nwabanne, & Banigo, 2020; Ezeh & Onukwuli, 2020; Government et al. , 2019; Onukwuli & Ikezue, 2014).…”

Section: Introductionmentioning

confidence: 99%

The impact of potassium permanganate (KMnO₄) treatment on the tensile strength of pineapple leaf fiber reinforced with tapioca-based bio resin

Ezeamaku

Ezekannagha²,

Eze³

et al. 2022

AGJSR

View full text Add to dashboard Cite

PurposeThe impact of potassium permanganate (KMnO4) treatment on the tensile strength of an alkali-treated pineapple leaf fiber (PALF) reinforced with tapioca-based bio resin (cassava starch) was studied.Design/methodology/approachThe PALF was exposed to sodium hydroxide (NaOH) treatment in varying concentrations of 2.0, 3.7, 4.5 and 5.5g prior to the fiber treatment with KMnO4. The treated and untreated PALFs were reinforced with tapioca-based bio resin. Subsequently, they were subjected to Fourier transform infrared (FTIR) and tensile test analysis.FindingsThe FTIR analysis of untreated PALF revealed the presence of O-H stretch, N-H stretch, C=O stretch, C=O stretch and H-C-H bond. The tensile test result confirmed the highest tensile strength of 35N from fiber that was reinforced with 32.5g of cassava starch and treated with 1.1g of KMnO4. In comparison, the lowest tensile strength of 15N was recorded for fiber reinforced with 32.5g of cassava starch without KMnO4 treatment.Originality/valueBased on the results, it could be deduced that despite the enhancement of bioresin (cassava starch) towards strength-impacting on the fibers, KMnO4 treatment on PALF is very vital for improved tensile strength of the fiber when compared to untreated fibers. Hence, KMnO4 treatment on alkali-treated natural fibers preceding reinforcement is imperative for bio-based fibers.

show abstract

Cissus Populnea Fiber - Unsaturated Polyester Composites: Mechanical Properties and Interfacial Adhesion

Cited by 23 publications

References 13 publications

Optimization and characterization of surface treated Lagenaria siceraria fiber and its reinforcement effect on epoxy composites

Optimization and characterization of surface treated Lagenaria siceraria fiber and its reinforcement effect on epoxy composites

Optimization, Sodium Hydroxide and Plantain Fibres: Mechanical Properties of Unsaturated Polyester Composites for Transtibial Prosthetic Socket

The impact of potassium permanganate (KMnO₄) treatment on the tensile strength of pineapple leaf fiber reinforced with tapioca-based bio resin

Contact Info

Product

Resources

About

Cissus Populnea Fiber - Unsaturated Polyester Composites: Mechanical Properties and Interfacial Adhesion

Cited by 23 publications

References 13 publications

Optimization and characterization of surface treated Lagenaria siceraria fiber and its reinforcement effect on epoxy composites

Optimization and characterization of surface treated Lagenaria siceraria fiber and its reinforcement effect on epoxy composites

Optimization, Sodium Hydroxide and Plantain Fibres: Mechanical Properties of Unsaturated Polyester Composites for Transtibial Prosthetic Socket

The impact of potassium permanganate (KMnO4) treatment on the tensile strength of pineapple leaf fiber reinforced with tapioca-based bio resin

Contact Info

Product

Resources

About

The impact of potassium permanganate (KMnO₄) treatment on the tensile strength of pineapple leaf fiber reinforced with tapioca-based bio resin