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以纳米SiO2/聚苯并噁嗪(PBOZ)为基体树脂,与碳纤维(CF)复合,制备了CF/SiO2/PBOZ复合材料,研究了纳米SiO2含量对其弯曲强度、层间剪切强度以及断面形貌的影响。结果表明,纳米SiO2含量为4%时,CF/SiO2/PBOZ复合材料的性能最好,材料的弯曲强度和层间剪切强度分别达到835和72.1MPa,比不含纳米SiO2的复合材料分别增加了14%和44%。将纳米SiO2含量为4%的CF/SiO2/PBOZ复合材料置于沸水中煮24h,处理前后的层间剪切强度和玻璃化转变温度均保持不变。
The nano-SiO2 / polybenzoxazine (PBOZ) as the matrix resin and carbon fiber (CF) composite, prepared CF / SiO2 / PBOZ composites, the study of the nano-SiO2 content of its flexural strength, interlaminar shear strength and cross section Topography impact. The results show that when the content of nano-SiO2 is 4%, the properties of CF / SiO2 / PBOZ composites are the best. The flexural strength and interlaminar shear strength of the composites reach 835 and 72.1 MPa, respectively, which are respectively higher than that of the composites without nano-SiO2 14% and 44%. The CF / SiO2 / PBOZ composite with 4% nano-SiO2 content was boiled in boiling water for 24 h, and the interlaminar shear strength and glass transition temperature remained unchanged before and after treatment.