Xu Yuzhi, Li Ning, Wang Guangbin, Wang Chunpeng, Chu Fuxiang
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China.
Research Institute of Forestry New Technology, Chinese Academy of Forestry, Beijing 100091, China.
Polymers (Basel). 2021 Mar 22;13(6):968. doi: 10.3390/polym13060968.
The conversion of cornstalk lignin derived from the co-product of bio-refinery into value-added products such as polymeric material has remarkable environmental and economic potential. A novel bio-based methyl methacrylate copolymerized with butyl acrylate (MMA--BA) hybrid resin in our research was prepared by the reversible addition-fragmentation chain transfer method using lignin-graft-polyacrylamide (lignin-g-PAM) as a bio-derived macromolecular chain transfer agent. The molecular architecture of lignin-g-PAM and the lignin-based MMA--BA hybrid resin was elucidated using H nuclear magnetic resonance and attenuated total reflectance-Fourier transform infrared. The thermal behavior and mechanical performance of the resultant lignin-based MMA--BA hybrid resins were also investigated through thermogravimetric analysis, differential scanning calorimetry, and a stress-strain test, respectively. The lignin-based acrylate resins system exhibited structure-related thermal and mechanical properties. Compared with pure MMA--BA resin, the incorporation of lignin into various lignin-based MMA--BA graft copolymers resulted in an improved tensile strength and a higher Young's modulus. This research could provide not only a new avenue to utilize waste biomass for high-value applications, but also a reference for designing new materials for coatings or adhesives.
将生物炼制副产品中的玉米秸秆木质素转化为聚合物材料等增值产品具有显著的环境和经济潜力。在我们的研究中，以木质素接枝聚丙烯酰胺（lignin-g-PAM）作为生物衍生的大分子链转移剂，通过可逆加成-断裂链转移法制备了一种新型的与丙烯酸丁酯共聚的生物基甲基丙烯酸甲酯（MMA-BA）杂化树脂。利用氢核磁共振和衰减全反射傅里叶变换红外光谱对木质素-g-PAM和木质素基MMA-BA杂化树脂的分子结构进行了阐明。还分别通过热重分析、差示扫描量热法和应力-应变测试对所得木质素基MMA-BA杂化树脂的热行为和力学性能进行了研究。木质素基丙烯酸酯树脂体系表现出与结构相关的热性能和力学性能。与纯MMA-BA树脂相比，在各种木质素基MMA-BA接枝共聚物中引入木质素可提高拉伸强度和杨氏模量。本研究不仅可为将废弃生物质用于高价值应用提供一条新途径，也可为设计涂料或胶粘剂新材料提供参考。
