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http://dx.doi.org/10.12925/jkocs.2012.29.1.12

Preparation and Characterization of Biomass-based Polymer Blend Films  

Lee, Soo (Department of Chemical Engineering, Changwon National University)
Jin, Seok-Hwan (Department of Chemical Engineering, Changwon National University)
Lee, Jae-Won (Department of Chemical Engineering, Changwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.29, no.1, 2012 , pp. 95-101 More about this Journal
Abstract
To manufacture of a completely biodegradable and compostable biomass -based blend polymer film, two types of cellulose acetates(DS=2.4 and DS=2.7) were blended with 5 - 50 wt% of low average molecular weight polylactide(PLA) by mixing each polymer solution having same viscosity in 10 wt% methanol/dichloromethane. Their surface morphology, thermal and mechanical properties were studied. The chemical structures of blend films were confirmed by the fourier transform IR spectroscopy with attenuated total reflection(FT-IR ATR) spectrophotometer. Scanning electron microscope(SEM) photos of blend films of both CAs with less than 5 % of PLA showed homogeneous morphology. On the contrary, the other blends with higher than 20 wt% of PLA content showed a large phase separation with spherical domains. The thermal property of blend films was also analyzed with thermogravimetric analysis(TGA) and differential scanning calorimeter(DSC). The tensile strength of CA/PLA blend films was increased up to $820kg_f/cm^2$ for TAC/PLA and $600kg_f/cm^2$ for DAC/PLA.
Keywords
blend film; PLA; cellulose; morphology; thermal property; biodegradable;
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