1. Department of Polymer Science Engineering; Inha University; Incheon 402-751 South Korea
2. National Marine Bioenergy Research Center; Inha University; Incheon 402-751 South Korea
3. Department of Marine Science & Biological Engineering; Inha University; Incheon 402-751 South Korea
4. Department of Advanced Materials; Hannam University; Daejeon 305-811 South Korea