Li Zhaomin, Kong Haijuan, Yu Muhuo, Zhu Shu, Qin Minglin
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
Medical (Jiaxing) Co., Ltd., Jiaxing 314000, China.
Polymers (Basel). 2020 Feb 8;12(2):381. doi: 10.3390/polym12020381.
Poor interfacial bonding between stainless steel wire and the inner and outer layer resin matrix significantly affects the mechanical performance of braid-reinforced composite hollow fiber tube, especially torsion control. In this work, a coating of thermoplastic polyurethane (TPU) deposited on the surface of stainless steel wire greatly enhanced the mechanical performance of braid-reinforced composite hollow fiber tube. This method takes advantage of the hydrogen bonding between polyether block amide (PEBA) and thermoplastic polyurethane (TPU) for surface modification of stainless steel wire, as well as the good compatibility between PEBA and TPU. The mechanical properties of composited tubes demonstrate that the interlaminar shear strength, modulus of elasticity, and torque transmission properties were enhanced by 27.8%, 42.1%, and 41.4%, respectively. The results indicating that the interfacial adhesion between the coated stainless steel wire and the inner and outer matrix was improved. In addition, the interfacial properties of composite hollow fiber tube before and after coating was characterized by the optical microscope, and results show that the interfacial adhesion properties of the modified stainless steel wire reinforced resin matrix composites were greatly improved.
不锈钢丝与内层和外层树脂基体之间较差的界面结合力会显著影响编织增强复合中空纤维管的机械性能，尤其是扭转控制性能。在这项工作中，沉积在不锈钢丝表面的热塑性聚氨酯（TPU）涂层极大地提高了编织增强复合中空纤维管的机械性能。该方法利用聚醚嵌段酰胺（PEBA）与热塑性聚氨酯（TPU）之间的氢键对不锈钢丝进行表面改性，以及PEBA与TPU之间的良好相容性。复合管的力学性能表明，层间剪切强度、弹性模量和扭矩传递性能分别提高了27.8%、42.1%和41.4%。结果表明，涂覆后的不锈钢丝与内外基体之间的界面粘结性得到了改善。此外，通过光学显微镜对复合中空纤维管涂层前后的界面性能进行了表征，结果表明改性不锈钢丝增强树脂基复合材料的界面粘结性能得到了极大的改善。
