摘 要本论文用化学共沉淀法制备了 Fe3O4纳米粒子，用 XRD 进行物相分析，用 SEM 进行形貌分析，并将其与 EVA 热熔胶复合制备复合热熔胶；通过调整 EVA 热熔胶制备原料配比制备粘接强度优异的热熔胶，对其进行了剥离强度测试确定出最佳配比；最后改变磁性材料（Fe3O4纳米粒子和铁粉）的百分比含量及目数与 EVA 热熔胶混合制成复合热熔胶膜，通过电磁感应器测试熔融时间。XRD 测试结果表明所制备的产物是 Fe3O4，立方系尖晶石结构。SEM 分析结果表明，在反应温度为 80℃，pH 值为 9 的反应条件下制备出的 Fe3O4粒径较小，局部有少量的团聚现象存在。剥离强度测试表明，EVA 树脂 100%、萜烯树脂 100%、邻苯二甲酸丁苄酯 15%的配方剥离力最大，其粘接性能最好，剥离强度为 5.899KN/m。电磁感应加热测试表明，加入 200%Fe3O4 的复合热熔胶熔融时间最短，完全熔融时间为 67秒；加入 200%、150 目铁粉的复合热熔胶熔融速度最快，完全熔融时间为 46 秒。关键词：磁性材料；复合热熔胶；电磁感应；熔融时间 ABSTRACTIn this paper, the Fe3O4 nanoparticles were prepared by chemical coprecipitation method, Phase was analyzed by XRD, pattern was analyzed by SEM, and then ,combined with EVA hot melt adhesive. The hot melt adhesive with excellent bonding strength was prepared by adjusting the ratio of raw material prepared by EVA hot melt adhesive. The optimum ratio was determined by the stripping strength test, the percentage content and the mesh number of the magnetic material (Fe3O4 nanoparticles and iron powder) were changed into the composite hot melt adhesive film by the EVA hot melt adhesive, and then the melting time was tested by the electromagnetic inductor. The results of XRD test show that the prepared products are Fe3O4, cubic spinel structure. The results of SEM analysis show that the Fe3O4 particle size is smaller with the reaction temperature of 80 and the pH of 9,there is a small amount of agglomeration in the local℃ area. Peel strength test show tha...
