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황산처리된 녹조류 보강 폴리프로필렌 바이오복합재료에 대한 그래핀 첨가영향
장영훈(Young Hun Jang),한성옥(Seong Ok Han),김형일(Hyung Il Kim),심이나(I Na Sim) 한국고분자학회 2013 폴리머 Vol.37 No.4
To improve the mechanical properties of polypropylene (PP) biocomposites reinforced with sulfuric acid-treated green algae (SGA), SGA/graphite nanoplatelets (GNP)/PP biocomposites were prepared and their properties were evaluated depending on the particle size and content of GNP. The flexural and impact strength of SGA/GNP/PP bio-composites decreased with the addition of GNP, whereas the flexrual and storage moduli were greatly improved with increasing GNP loading. SGA/GNP/PP biocomposites reinforced with GNP5 showed generally better mechanical prop-erties compared to that reinforced with GNP15 mainly due to the improved dispersion of the smaller GNP. SGA/GNP/PP biocomposites reinforced with GNP5 showed a lower resistance to the thermal expansion because the relatively uni-form dispersion of smaller GNP was responsible for the effective heat transfer to the polymer matrix. As a result, SGA/GNP/PP biocomposite was acceptable for the general purpose application due to the improved flexural resistance, storage moduli, and damping characteristics.