Development of fiberreinforced polypropylene with NaOH pretreated rice and coffee husks as fillers: Mechanical and thermal properties

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dc.contributor.authorAndrew Yiga, Vianney
dc.contributor.authorPage, Sinja
dc.contributor.authorLubwama, Michael
dc.contributor.authorEpple, Stefan
dc.contributor.authorOlupot, Peter Wilberforce
dc.contributor.authorBonten, Christian
dc.date.accessioned2022-11-30T14:21:06Z
dc.date.available2022-11-30T14:21:06Z
dc.date.issued2020
dc.description.abstractIncorporation of agricultural wastes as fillers in fiber-reinforced plastics is gaining momentum in plastics engineering research. In this study, fiber-reinforced polypropylene (PP) with rice and coffee husks as filler material were developed. The effect of alkali (sodium hydroxide) pretreatment of the husks on mechanical and thermal properties of developed PP biocomposites was observed. Filler material loading was varied from 0% to 20% for rice husks and 0% to 10% for coffee husks. A twin-screw extruder was used for compounding the PP matrix with rice and coffee husk filler materials. Tensile strengths and percentage elongation results varied from 27.4 to 37.4 MPa and 2.4% to 70.3% (unmodified coffee husks), 31.1 to 37.4 MPa and 5% to 70.3% (unmodified rice husks), 30.7 to 37.4 MPa and 5.3% to 70.3% (modified coffee husks), and 30.7 to 37.4 MPa and 4.8% to 70.3% (modified rice husks). Young’s modulus ranged between 1656 and 2247.8 MPa for biocomposite PP samples with unmodified filler material. Young’s modulus ranged between 1740 and 2160 MPa after alkali treatment of the filler material. Charpy impact strengths ranged from 1.2 to 4 kJ/m2 and 3.1 to 19.6 kJ/m2 for samples containing unmodified and modified filler material, respectively. Thermogravimetric analysis showed that an increase in filler content resulted into delayed weight loss at high degradation temperatures. The results suggest that these developed fiber-reinforced plastics can be used in applications requiring high thermal stability and good mechanical properties.en_US
dc.identifier.citationYiga, V. A., Pagel, S., Lubwama, M., Epple, S., Olupot, P. W., & Bonten, C. (2020). Development of fiber-reinforced polypropylene with NaOH pretreated rice and coffee husks as fillers: mechanical and thermal properties. Journal of Thermoplastic Composite Materials, 33(9), 1269-1291. DOI: 10.1177/0892705718823255en_US
dc.identifier.other10.1177/0892705718823255
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/5561
dc.language.isoenen_US
dc.publisherJournal of Thermoplastic Composite Materialsen_US
dc.subjectAlkali treatmenten_US
dc.subjectCelluloseen_US
dc.subjectCoffee husksen_US
dc.subjectFiber-reinforced plasticsen_US
dc.subjectPolypropyleneen_US
dc.subjectRice husksen_US
dc.titleDevelopment of fiberreinforced polypropylene with NaOH pretreated rice and coffee husks as fillers: Mechanical and thermal propertiesen_US
dc.typeArticleen_US
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