Liu Hao, Wang Lu, Zhang Xiaoxue, Zang Junbo, Xu Song, Zhang Chunhong, Ao Yuhui, Du Weifeng, Shang Lei
Jilin Provincial Laboratory of Carbon Fiber and Composites, Jilin Province Key Laboratory of Carbon Fiber Development and Application, College of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, China.
Zhejiang Baojing Carbon Material Co., Ltd., Shaoxing 312073, China.
J Colloid Interface Sci. 2025 Mar;681:269-280. doi: 10.1016/j.jcis.2024.11.187. Epub 2024 Nov 26.
The preparation of environmentally friendly and efficient waterborne polyurethane sizing agents for carbon fiber (CF) is difficult, especially to avoid the use of isocyanates. Herein, ellagic acid and CO were used to prepare a five-membered cyclic carbonate compound (EARBO). The polymerization between EARBO and diamines enabled the preparation of highly efficient and green aqueous non-isocyanate polyurethane (WNIPU) sizing agents. WNIPU sizing agent exhibits excellent heat resistance (T:244.5 °C). The hydroxyl group and tertiary amine effectively enhance the polarity and wettability of CF (CF surface energy is as high as 55.42 mJ/m) and show excellent compatibility with epoxy resin. Carbon fiber/epoxy composites treated with this sizing agent showed exceptional interfacial properties, achieving interfacial shear strength, ply shear strength, flexural strength, and tensile strength of 116.84 MPa, 71.58 MPa, 1352.79 MPa, and 1719.27 MPa, respectively-representing 112.05 %, 42.05 %, 86.68 %, and 87.11 % improvements over traditional composites. The WNIPU sizing agent's efficiency and environmental advantages indicate it as a promising alternative to commercial polyurethanes.
制备用于碳纤维（CF）的环保高效水性聚氨酯上浆剂具有挑战性，尤其是要避免使用异氰酸酯。在此，使用鞣花酸和一氧化碳制备了一种五元环状碳酸酯化合物（EARBO）。EARBO与二胺之间的聚合反应使得能够制备高效且绿色的水性非异氰酸酯聚氨酯（WNIPU）上浆剂。WNIPU上浆剂表现出优异的耐热性（T：244.5℃）。羟基和叔胺有效地增强了CF的极性和润湿性（CF表面能高达55.42 mJ/m²），并与环氧树脂表现出优异的相容性。用这种上浆剂处理的碳纤维/环氧树脂复合材料显示出优异的界面性能，界面剪切强度、层间剪切强度、弯曲强度和拉伸强度分别达到116.84 MPa、71.58 MPa、1352.79 MPa和1719.27 MPa，分别比传统复合材料提高了112.05%、42.05%、86.68%和87.11%。WNIPU上浆剂的效率和环境优势表明它是商业聚氨酯的一种有前途的替代品。
