热水浴激化TA@Fe3+增强TC4/GF-PET界面的变温拉伸剪切强度研究OA

The paper proposed a green synergistic interfacial regulation strategy of"hot-water bath combined with aqueous tannic acid(TA)@Fe3+complex coating".The effects of different pretreatment processes on the interfacial bonding performance of Ti-6Al-4V/glass fiber-reinforced polyethylene terephthalate(TC4/GF-PET)heterogeneous structures were systematically investigated.TC4/GF-PET heterogeneous structures were fabricated by injection molding,and their interfacial morphologies and chemical structures were characterized.The interfacial mechanical behaviors were evaluated through room-temperature and high temperature tensile shear tests and fracture surface micrographs.The results showed that simple hot-water bath treatment only improved the tensile shear strength at room temperature and high temperature of the TC4/GF-PET heterogeneous structure to 6.32,3.33 MPa.After introducing TA@Fe3+,relying on the hydrogen bonding and coordination bonding between TA@Fe3+and PET,the tensile shear strength at room temperature and high temperature of the heterogeneous structure increased to 15.63,9.41 MPa.The hot-water bath+TA@Fe3+treatment enabled the formation of the densest and most ordered oxygen-containing functional group network at the interface,significantly enhancing the synergistic effect of mechanical interlocking and chemical bonding at the interface,which further improved the tensile shear strength at room temperature and high temperature of the heterogeneous structure to 23.94,16.74 MPa.The study demonstrated that the hot-water bath+TA@Fe3+coating synergistic process could achieve high-strength and high-temperature-stable bonding of the TC4/PET interface under green processing conditions,providing an effective approach for interfacial design and rapid molding process optimization of titanium alloy/engineering plastic lightweight heterogeneous structures in low-altitude economy and other fields.