Li Yanan, Zhang Bin, Zhao Yuzhuo, Lu Shuai, Fan Donglei, Wang Song, Liu Jie, Tang Tao, Li Sanxi
School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang 110870, China.
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
Polymers (Basel). 2023 Dec 12;15(24):4683. doi: 10.3390/polym15244683.
This paper describes the synthesis of NIPU by using cardanol as starting material. A cardanol formaldehyde oligomer was first prepared through the reaction of cardanol and formaldehyde, catalyzed by citric acid. The resulting oligomer was then subjected to epoxidation with m-chloroperbenzoic acid to obtain an epoxide compound, which was subsequently used to fix carbon dioxide (CO) and form a cyclic carbonate. Using this cyclic carbonate, along with an amine, cardanol-based isocyanate polyurethane (NIPU) was prepared. Different characterization methods, such as Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), and thermogravimetric analysis (TGA), were used to confirm the synthesis of the four intermediate products and NIPU in the reaction process. This study highlights the promise of bio-based NIPU as a sustainable alternative in a number of applications while offering insightful information on the synthesis and characterization of the material.
本文描述了以腰果酚为起始原料合成NIPU的过程。首先通过柠檬酸催化腰果酚与甲醛反应制备了腰果酚甲醛低聚物。然后将所得低聚物用间氯过苯甲酸进行环氧化反应，得到环氧化合物，该环氧化合物随后用于固定二氧化碳（CO）并形成环状碳酸酯。使用这种环状碳酸酯，与胺一起制备了基于腰果酚的异氰酸酯聚氨酯（NIPU）。采用傅里叶变换红外光谱（FTIR）、质子核磁共振（NMR）、凝胶渗透色谱（GPC）和热重分析（TGA）等不同表征方法，确认了反应过程中四种中间产物和NIPU的合成。本研究突出了生物基NIPU作为许多应用中可持续替代品的前景，同时提供了有关该材料合成和表征的深入信息。
