Liu Chao, Liu Hongfei, Wang Huijie, Yu Zhaochuan, Yan Ming, Zhou Xuelian, Li Renai
International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, China.
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Jiangsu Province Key Laboratory of Biomass Energy and Materials, Nanjing, China.
Front Bioeng Biotechnol. 2024 Oct 9;12:1484585. doi: 10.3389/fbioe.2024.1484585. eCollection 2024.
The excessive utilization of petroleum-based plastic products has led to a pervasive environmental and human health threat. In response, the adoption of bioplastics derived from biomass has emerged as the foremost alternative to conventional plastics, owing to their inherent biodegradability and sustainability. The present study demonstrates the preparation of a biodegradable and cost-effective lignocellulosic bioplastic by utilizing dissolving bamboo leaf powder with deep eutectic solvents (DES) and regenerating lignin . The DES was synthesized through a one-step heating and stirring method using choline chloride (ChCl) and anhydrous oxalic acid. The crystallinity of the bioplastics is enhanced by DES pretreatment, thereby improving the internal structural order of the material. Moreover, lignin regeneration reduces the pore size within the bioplastics and contributes to a more compact internal structure. The prepared lignocellulosic bioplastics exhibit remarkable mechanical strength, with a tensile strength of 113 MPa. Additionally, they demonstrate good water stability, as evidenced by a contact angle of 55.52°. Moreover, these bioplastics possess an exceptional biodegradability with a degradation rate exceeding 98% after 60 days. This study presents an innovative approach for the high-value utilization of bamboo leaf resources.
石油基塑料制品的过度使用已对环境和人类健康构成了普遍威胁。作为回应，由于其固有的生物可降解性和可持续性，采用源自生物质的生物塑料已成为传统塑料的首要替代品。本研究展示了一种通过用深共晶溶剂（DES）溶解竹叶粉并再生木质素来制备可生物降解且经济高效的木质纤维素生物塑料的方法。DES是通过使用氯化胆碱（ChCl）和无水草酸的一步加热搅拌法合成的。DES预处理提高了生物塑料的结晶度，从而改善了材料的内部结构有序性。此外，木质素再生减小了生物塑料内部的孔径，并有助于形成更致密的内部结构。所制备的木质纤维素生物塑料表现出显著的机械强度，拉伸强度为113MPa。此外，它们表现出良好的水稳定性，接触角为55.52°即可证明。而且，这些生物塑料具有出色的生物可降解性，60天后降解率超过98%。本研究提出了一种竹叶资源高值利用的创新方法。
