Study on the Preparation and Properties of Polylactic acidEthyl cellulose Blend Films.pdfVIP
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Study on the Preparation and Properties of Polylactic acidEthyl cellulose Blend Films
Study on the Preparation and Properties of Polylactic
acid/Ethyl cellulose Blend Films1
Shen Yiding ﹡,Lai Xiaojuan ,Wang Lei
College of chemistry and chemical engineering,Shaanxi University of Science Technology,
Xi’an (710021 )
E-mail :ydshen@
Abstract
Poly(lactic acid)/ethyl cellulose composite films(PLA-EC) were prepared by a casting method
when using n-alkenyl succinic anhydride(ASA) as a novel plasticizer and chloroform as
co-solvent. Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction (XRD) and
scanning electron microscope(SEM) were used to analyze the morphological properties of the
composite films. Mechanical properties and water absorption of the cast composite films were
also measured. FT-IR indicates there are some strong interaction and good compatibility in
composite films. XRD shows that both EC and PLA lost crystallinity after being plasticized,
and the PLA/EC composite films plasticized with n-ASA result in a markedly enhanced
coalescence of the two polymers. n-ASA is proved to be an ideal plasticizer for EC based films
after testing mechanical properties. The PLA resin has a reinforcing effect on PLA/EC
composite films when w(PLA) ≤37%. Water absorption decreases with increasing ASA content
while it increases with increasing PLA content in the PLA/EC composite films. The composite
films can be used as a new kind of drug delivery material with the wide application prospect.
Keywords :Poly(lactic acid)
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