【摘要】 采用连续滚辊压-空间限域强制组装法(CR-SCFNA)制备了短切碳纤维/聚甲基乙烯基硅氧烷橡胶(SCF/MVQ)导电/导热复合材料。将MVQ作为聚合物基体，SCF作为填料，制备的SCF/MVQ复合材料具有较好的导电/导热性能。在空间限域强制组装(SCFNA)的基础上，提出了CR-SCFNA工艺，研究了该方法对其复合材料性能的影响，并且，观察了在柔性可变形的橡胶辊作用下，其复合材料的填料取向。研究表明，在CR-SCFNA的作用下，当SCF的浓度达到30%时，厚度为0.3 mm的SCF/MVQ复合材料的热导率达到了10.42 W/(m·K),纵向电导率和横向电导率分别达到了3 190.68、704.78 S/m,其拉伸强度及断裂伸长率分别达到了1.20 MPa和62.8%。除此以外，由于柔性软辊独特的制备工艺，将其与SCFNA结合得到的CR-SCFNA可以实现连续化制备。因此，基于CR-SCFNA方法制备的SCF/MVQ复合材料具备较好的热性能、电性能及力学性能，可以满足热管理材料(TMMs)的使用要求。更多还原

【Abstract】 Short-cut carbon fiber/poly(methyl vinyl siloxane) rubber(SCF/MVQ) electrically/thermally conductive composites were prepared by continuous roll-space limited domain forced assembly(CR-SCFNA) method. The SCF/MVQ composites prepared by MVQ matrix and SCF filler had excellent electrically/thermally conductive properties. CR-SCFNA was proposed on the basis of space limited domain forced assembly(SCFNA), and the effect of this method on the properties of composites were investigated and the orientation distribution of fillers in composites was observed under the action of a flexible deformable rubber roll. It was shown that under the effect of CR-SCFNA method, when the SCF content reached 30%, the thermal conductivity of SCF/MVQ composites with 0.3 mm thickness reached 10.42 W/(m·K), the longitudinal conductivity and transverse conductivity reached 3 190.68 and 704.78 S/m, and the tensile strength and elongation at break reached 1.20 MPa and 62.8% respectively. In addition, due to the unique preparation process of flexible soft rollers, the proposed CR-SCFNA by combining it with SCFNA could realize continuous preparation. Therefore, the SCF/MVQ composites prepared based on the CR-SCFNA method had good thermal, electrical, and mechanical properties, which could fulfill the use of thermal management materials(TMMs).更多还原