Preparation method of modified aramid fiber, modified aramid fiber and modified asphalt

The invention belongs to the technical field of fiber materials, and provides a method for preparing modified aramid fiber, which comprises the following steps: step 1, providing aramid fiber; 2, dissolving the complex in a first organic solvent to obtain a first mixed solution, adding aramid fibers into the first mixed solution, soaking for 8-48 hours, and then drying; and 3, dissolving the compound shown in the formula I in a second organic solvent to obtain a second mixed solution, adding the product obtained in the step 2 into the second mixed solution, soaking for 1-4 hours, and drying to obtain the modified aramid fiber. 本发明属于纤维材料技术领域，提供了一种制备改性芳纶纤维的方法，该方法包括以下步骤：步骤1：提供芳纶纤维；步骤2：将络合物溶于第一有机溶剂中，得到第一混合溶液，并向第一混合溶液中加入芳纶纤维，浸泡8-48h后进行干燥过程；步骤3：将式I化合物溶于第二有机溶剂中，得到第二混合溶液，并向第二混合溶液中加入步骤2所得产物，浸泡1-4h后进行干燥过程，得到改性芳纶纤维。