| 초록 |
Biodegradable plastic is one way to overcome the problem caused by packaging waste. Among them, PBAT is considered a substitute for PE due to its excellent flexibility. Many studies have continued to improve the insufficient mechanical strength of PBAT, and PBAT/TPS blend is an attractive material that can meet both biodegradability and mechanical strength. However, TPS is less compatible with PBAT and is very weak in moisture. In this study, we prepared TPS containing cellulose nanofiber(CNF) and layered double hydroxide(LDH). CNF exfoliated and combined LDH, and then LDH formed a tortuous path, making it difficult to diffuse moisture. In addition, the CNF bonded with LDH formed hydrogen bonds with starch, thereby improving the viscosity of TPS. As a result, TPS was dispersed as smaller droplets in PBAT. The well-dispersed TPS increased mechanical strength of PBAT, resulting in PBAT/TPS blend showing properties suitable for packaging while maintaining high biodegradability. |
