fibrillate

verb [vt. 及物动词]（肌肉，尤指心肌）作纤维性颤动；（使纤维）分裂成原纤维

The results showed that like aramid pulp, the aramid short fibre tended to split and fibrillate when the aramid short fibre reinforced composite was mixed on a mill.
结果表明，与芳纶纸浆一样，当芳纶短纤维增强复合材料在研磨机中混合时，芳纶短纤维也容易发生断裂和纤维化。