Modification of Pumice Mineral and Its Use as Additive for Poly (Lactic Acid) Based Bio-Composite Materials
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Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, pumice (P) mineral was treated with silane in order to increase the compatibility forpoly(lactic acid) (PLA) which is a fully biodegradable polymer widely used in packaging and outdoorapplications. Neat and treated P powders were compounded with PLA at the concentrations of 5, 10,15 and 20 wt% by melt mixing process. Surface characteristics of P samples were examined usinginfrared spectroscopy. Mechanical, water uptake, melt-flow and morphological properties of preparedcomposites were investigated by tensile and impact tests, water absorption test, melt flow rate test(MFR) and scanning electron microscopy (SEM) technique, respectively. Mechanical test resultsrevealed that the highest increase in tensile strength and modulus values was obtained for 15 wt% ofsilanized P containing composite which are found as 4.5% and 40% increase, respectively. Addition ofsilane-treated P into PLA resulted in an increase in impact strength of about 33% compared to samplescontaining that were not treated with silane with the same proportion of P. Impact strengths ofcomposites increased with increasing P concentration. Silanized P filled composite gave slightly higherMFR values with respect to pristine P. Water absorption values of composites were found as about twofoldhigher than that of unfilled PLA. Composites containing silanized P exhibited lower water uptakevalues compared to untreated P samples because of the hydrophobic character of silicon containingsurfaces. SEM micro-images of composites displayed that more homogeneous dispersion in PLA matrixwas taken place for silane treated P particles than that of neat P stem from the increase of adhesionbetween P and PLA surfaces after silanization process.
Açıklama
Anahtar Kelimeler
Malzeme Bilimleri, Özellik ve Test, Malzeme Bilimleri, Seramik, Malzeme Bilimleri, Kompozitler
Kaynak
Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
20
Sayı
1
