USE OF TURKISH BENTONITE MINERAL AS AN ADDITIVE FOR POLY(LACTIC ACID) BASED BIO-COMPOSITE MATERIALS
[ X ]
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, Turkish bentonite (BN) mineral is subjected to silane treatment in order to enhance its compatibility for poly(lacticacid) (PLA). Neat and surface silanized BN powders are compounded with PLA using melt blending process at theconcentrations of 5, 10, 15 and 20 wt%. Surface characteristics of BN samples are examined by infrared spectroscopy.Mechanical, thermo-mechanical, water resistance, melt flow and morphological investigations of composites are performed bytensile and impact tests, dynamic mechanical analysis (DMA), water absorption test, melt flow rate test (MFR) and scanningelectron microscopy (SEM) analysis, respectively. Mechanical test results show that BN additions lead to increase in tensilestrength and modulus of PLA. The maximum improvement is obtained for 15 wt% of silanized BN containing composite.Silanized BN filled PLA displays higher impact performance compared to untreated BN sample. Impact energy values ofcomposites increase with increase in loading ratio. Silanized BN containing composite with 20 wt% concentration gives thehighest storage modulus according to the DMA study. Glass transition temperature of PLA is improved by the inclusions of allBN samples. Additions of BN make slight decreases on MFR value of PLA. However, these reductions are found to benegligible in terms of its effect on processing of material. Water uptakes of composites are found to be higher than that of PLA.Composites containing silanized BN have lower water absorption values than neat BN samples due to the hydrophobicity ofsilicon containing surface. SEM characterization reveals that more homogeneous dispersion in PLA matrix is observed forsilane treated BN compared to neat BN particles thanks to improvement of interfacial adhesion between BN and PLA matrix.
Açıklama
Anahtar Kelimeler
Malzeme Bilimleri, Özellik ve Test, Mühendislik, Kimya, Malzeme Bilimleri, Biyomalzemeler, Malzeme Bilimleri, Seramik
Kaynak
Eskişehir Technical University Journal of Science and and Technology A- Applied Sciences and Engineering
WoS Q Değeri
Scopus Q Değeri
Cilt
21
Sayı
1