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International Journal of Nanoscience and Nanotechnology (IJNN)، جلد ۱۰، شماره ۴، صفحات ۲۴۵-۲۵۶
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عنوان انگلیسی Functional Properties of Biodegradable Nanocomposites from Poly Lactic Acid (PLA)
چکیده انگلیسی مقاله Nanocomposite composed of organoclay(Cloisite 20A-C20A) and Poly lactic acid (PLA) was prepared by solvent casting method. Physical, mechanical, thermal, barrier and microstructure properties of the composite were studied. X-Ray diffraction (XRD) patterns and scanning electron microscopy (SEM) images revealed that the diffraction peak of nanoclay shifted to lower angles and the d-spacing between the C20A layers increased. The formation of an intercalated structure with good compatibility and homogeneously dispersed nanoparticles was observed. Tensile strength (TS) and elastic modulus (E-M) of PLA/C20A nanocomposites increased significantly with clay concentrations, while the values of elongation (E) percentage decreased dramatically. Glass transition temperature (Tg) and degree of crystallinity (%) were determined by DSC (Differential Scanning Calorimetry). The presence of C20A provoked significant raise in both the Tg and the degree of crystallinity. The water vapor permeability (WVP) of the nanocomposites compared to pure PLA moved down by approximately 12-50% by adding 3-7 wt% C20A. An atomic force microscopy (AFM) was applied to evaluate the surface morphology and roughness of PLA films. Pure PLA possessed smoother surfaces and a lower roughness parameter (Sa). New composite based on PLA and C20A could prove to be an improved biopolymer with better functional properties for packaging and other applications.
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نویسندگان مقاله سعید داداشی |
department of food science, engineering and technology, faculty of agricultural engineering amp;amp; technology, college of agriculture amp;amp; natural resources, university of tehran, karaj, i.r iran
سازمان اصلی تایید شده: دانشگاه تهران (Tehran university)

سید محمد موسوی | seyed mohammad
department of food science, engineering and technology, faculty of agricultural engineering amp;amp; technology, college of agriculture amp;amp; natural resources, university of tehran, karaj, i.r iran
سازمان اصلی تایید شده: دانشگاه تهران (Tehran university)

زهرا امام جمعه | emam djomeh
department of food science, engineering and technology, faculty of agricultural engineering amp;amp; technology, college of agriculture amp;amp; natural resources, university of tehran, karaj, i.r iran
سازمان اصلی تایید شده: دانشگاه تهران (Tehran university)

عبدالرسول ارومیه ای |
iran polymer and petrochemical institute, pazhoohesh street, tehran, i.r iran

نشانی اینترنتی http://www.ijnnonline.net/article_11236_5e871c7b233bba002091919421e037df.pdf
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