Cao Zhiyuan, Gao Fei, Zhao Jinze, Wei Xiao, Cheng Qian, Zhong Jiang, Lin Cong, Shu Jinbing, Fu Changqing, Shen Liang
Jiangxi Engineering Laboratory of Waterborne Coating, School of Chemistry and Chemical Engineering, Jiangxi Science &Technology Normal University, Nanchang 330013, China.
Polymers (Basel). 2019 Nov 4;11(11):1809. doi: 10.3390/polym11111809.
Bio-based coating materials were prepared from epoxidized soybean oil as a renewable source. Acetoacetylated soybean oil was synthesized by the ring-opened and transesterification reaction of epoxidized soybean oil, and its chemical structure was characterized by nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), and rheometric viscosity analyses. On the basis of acetoacetylated soybean oil, several bio-based coating materials were prepared using different aromatic dicarboxaldehydes (1,2-benzenedialdehyde, 1,3-benzenedialdehyde, 1,4-phthalaldehyde, 4,4'-biphenyldicarboxaldehyde) and characterized. The resulting films possess good performance, including the highest glass transition temperature of 54 °C, a Young's modulus of 24.91 MPa, tensile strength of 5.65 MPa, and an elongation at break of 286%. Thus, this work demonstrates the Knoevenagel condensation reaction, which is based on soybean oil as a potential newer eco-friendly raw material.
生物基涂料材料是以环氧化大豆油这种可再生资源制备而成的。乙酰乙酰化大豆油是通过环氧化大豆油的开环和酯交换反应合成的，其化学结构通过核磁共振（NMR）、傅里叶变换红外光谱（FTIR）、凝胶渗透色谱（GPC）和流变粘度分析进行表征。在乙酰乙酰化大豆油的基础上，使用不同的芳香二醛（1,2-苯二醛、1,3-苯二醛、1,4-邻苯二醛、4,4'-联苯二醛）制备了几种生物基涂料材料并进行了表征。所得薄膜具有良好的性能，包括最高玻璃化转变温度为54℃、杨氏模量为24.91MPa、拉伸强度为5.65MPa以及断裂伸长率为286%。因此，这项工作证明了基于大豆油的克诺文纳格尔缩合反应是一种潜在的新型环保原料。
