Wang Zhenyu, Guo Huijun, Zhou Hang, Ouyang Xinfeng, Jiang Di, Li Jianhua, Guo Qipeng, Tang Jun, Yang Chuncai
Research School of High Performance Fiber and Composite, Jilin Institute of Chemical Technology, Jilin 132000, China.
China composites Group Co., Ltd., Beijing 100036, China.
Polymers (Basel). 2019 Sep 19;11(9):1528. doi: 10.3390/polym11091528.
Herein, we report self-emulsifying anionic unsaturated polyester emulsions with different chain segments as novel sizing agents. The epoxy modified unsaturated polyester emulsions were synthesized via a self-emulsifying technique with no organic solvents. Emulsions were characterized by dynamic light scattering (DLS), Zeta potential, centrifuge, and cryo-scanning electron microscopy (Cryo-SEM). The results showed that the emulsions obtained were mono-dispersed nanospheres that had adequate colloidal stability. The maximum Zeta potential of the sizing agent is -52.88 mV. In addition, these emulsions were investigated as the sizing agents in order to improve interfacial adhesion between carbon fibers (CFs) and unsaturated polyester resin (UPR). Compared with the CFs sized with the commercial epoxy sizing agent, the interlaminar shear strength (ILSS) of CF/UPR composites from the CFs sized by these emulsion sizing agents with three different chain structures were enhanced by 25%, 29%, and 42%, respectively. The emulsion sizing agent composed of a flexible segment synthesized from adipic acid, neopentyl glycol, and maleic anhydride is most effective and can achieve the highest enhancement of the ILSS of CF/UPR composites.
在此，我们报道了具有不同链段的自乳化阴离子不饱和聚酯乳液作为新型上浆剂。通过无有机溶剂的自乳化技术合成了环氧改性不饱和聚酯乳液。通过动态光散射（DLS）、Zeta电位、离心和低温扫描电子显微镜（Cryo-SEM）对乳液进行了表征。结果表明，所获得的乳液是具有足够胶体稳定性的单分散纳米球。上浆剂的最大Zeta电位为-52.88 mV。此外，对这些乳液作为上浆剂进行了研究，以改善碳纤维（CFs）与不饱和聚酯树脂（UPR）之间的界面粘附力。与用商业环氧上浆剂上浆的CFs相比，由三种不同链结构的这些乳液上浆剂上浆的CF/UPR复合材料的层间剪切强度（ILSS）分别提高了25%、29%和42%。由己二酸、新戊二醇和马来酸酐合成的柔性链段组成的乳液上浆剂最有效，并且可以实现CF/UPR复合材料ILSS的最高提高。
