聚乳酸
木质素
漆酶
生物降解
材料科学
热塑性塑料
热塑性聚氨酯
聚合物
聚氨酯
化学工程
复合材料
有机化学
化学
弹性体
酶
工程类
作者
Gabriel Murillo-Morales,Sivasamy Sethupathy,Meng Zhang,Lingxia Xu,Amirreza Ghaznavi,Jie Xu,Bin Yang,Jianzhong Sun,Daochen Zhu
标识
DOI:10.1016/j.ijbiomac.2023.123881
摘要
Polylactic acid (PLA) has been used in fused deposition method (FDM) based 3D printing for many years. Alkali lignin is an undervalued industrial by-product that could upgrade PLA's poor mechanical properties. This work presents a biotechnological approach consisting of a partial degradation of alkali lignin using Bacillus ligniniphilus laccase (Lacc) L1 for its use as a nucleating agent in a polylactic acid/thermoplastic polyurethane (PLA/TPU) blend. Results showed that adding enzymatically modified lignin (EL) increased the elasticity modulus to a maximum of 2.5-fold than the control and conferred a maximum biodegradability rate of 15 % after 6 months under the soil burial method. Furthermore, the printing quality rendered satisfactory smooth surfaces, geometries and a tunable addition of a woody color. These findings open a new door for using laccase as a tool to upgrade lignin's properties and its use as a scaffold in manufacturing more environmentally sustainable filaments with improved mechanical properties for 3D printing.
科研通智能强力驱动
Strongly Powered by AbleSci AI