基于生物的原儿茶酸衍生物对双酚A缩水甘油醚（DGEBA）的高效增韧

Efficient Toughening of DGEBA with a Bio-Based Protocatechuic Acid Derivative.

作者信息

Fang Xinxin, Guo Xin, Tang Weilin, Gu Qun, Wu Yue, Sun Hua, Gao Junfei

机构信息

College of Biotechnology, Tianjin University of Science and Technology, 13 St. 29, TEDA, Tianjin 300457, P. R. China.

Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West 7th Avenue, Tianjin Airport Economic Area, Tianjin 300308, P. R. China.

出版信息

ACS Omega. 2023 Mar 10;8(11):9962-9968. doi: 10.1021/acsomega.2c07140. eCollection 2023 Mar 21.

In this work, a bio-based epoxy resin, protocatechuic acid diester epoxy resin, (PDEP), was synthesized using protocatechuic acid. The structure and properties of PDEP have been characterized by H NMR, C NMR, and Fourier transform infrared. After different contents of PDEP were added to diglycidyl ether of bisphenol A (DGEBA), the modified epoxy resins were cured by 4,4'-diaminodiphenylmethane (DDM). With the addition of a flexible long-chain bio-based monomer to improve toughness, the impact strength was 50 kJ·m with only 5.0 wt % PDEP; compared with pure DGEBA, the impact strength was 27 kJ·m. Further, an increase in should be confirmed from the mechanical cross-linking density and rigidity group content. The single proved the homogeneous phase structure of the PDEP-cured resin. Morphology exhibiting the ductile fracture of the cured resin was confirmed by scanning electron microscopy. Overall, this work demonstrates the utilization of renewable protocatechuic acid as an effective modifier for epoxy resin, which reflects its potential application.

在本工作中，使用原儿茶酸合成了一种生物基环氧树脂——原儿茶酸二酯环氧树脂（PDEP）。通过氢核磁共振（¹H NMR）、碳核磁共振（¹³C NMR）和傅里叶变换红外光谱对PDEP的结构和性能进行了表征。将不同含量的PDEP添加到双酚A二缩水甘油醚（DGEBA）中后，用4,4'-二氨基二苯甲烷（DDM）对改性环氧树脂进行固化。通过添加柔性长链生物基单体来提高韧性，仅添加5.0 wt%的PDEP时，冲击强度为50 kJ·m⁻²；与纯DGEBA相比，冲击强度为27 kJ·m⁻²。此外，应从机械交联密度和刚性基团含量方面确认其增加情况。单一的……证明了PDEP固化树脂的均相结构。通过扫描电子显微镜确认了固化树脂呈现韧性断裂的形态。总体而言，本工作展示了利用可再生的原儿茶酸作为环氧树脂的有效改性剂，这体现了其潜在的应用价值。（注：原文中“Further, an increase in should be confirmed from the mechanical cross-linking density and rigidity group content.”和“The single proved the homogeneous phase structure of the PDEP-cured resin.”这两处的“ ”指代不明，翻译时保留原文形式。）