Structure and properties of hybrid PLA nanocomposites with inorganic nanofillers and cellulose fibers

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• 作者：K. Piekarska^a ; P. Sowinski^a ; E. Piorkowska^a ; ^{epiorkow@cbmm.lodz.pl" class="auth_mail" title="E-mail the corresponding author} ; Md.M.-Ul. Haque^b ; ¹ ; M. Pracella^b ; ^c
• 关键词：A. Nano-structures ; A. Polymer-matrix composites (PMCs) ; B. Mechanical properties ; B. Thermal properties
• 刊名：Composites Part A: Applied Science and Manufacturing
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：82
• 期：Complete
• 页码：34-41
• 全文大小：2019 K

文摘

Polylactide reinforced with 3 wt% of organo-modified montmorillonite, 5 wt% of stearic acid-modified calcium carbonate nanoparticles, 15 wt% of cellulose fibers (PLA/MMT, PLA/NCC, PLA/CF) and hybrid composites containing 15 wt% of fibers in addition to montmorillonite (PLA/MMT/CF) or calcium carbonate (PLA/NCC/CF) were prepared and examined. The nanoparticles were dispersed in polylactide almost homogeneously; montmorillonite was exfoliated during processing. T_g of polylactide remained unaffected but its cold crystallization was enhanced; the cold-crystallization behavior of the hybrid composites was dominated by nanofillers nucleating ability. The fibers and calcium carbonate decreased whereas exfoliated montmorillonite improved the thermal stability of the materials. Polylactide, PLA/NCC and PLA/MMT exhibited ability to plastic deformation, although the latter the weakest. Tensile behavior of the hybrid composites was strongly influenced by the fibers and similar to that of PLA/CF. All the fillers increased the storage modulus below T_g; that of PLA/MMT/CF and PLA/NCC/CF was improved with respect to polylactide by 50% and 45%, respectively.