CAJ | 학술논문

目的：研究国产芳纶纤维 DAF-III 表面上浆剂的主要成分及其对复合材料界面性能的影响。方法用丙酮溶剂抽提纤维一定时间，分析对比去除上浆剂前后的纤维和抽提溶液，并制备 DAF-III 增强的聚三唑树脂复合材料，测试复合材料的力学性能。结果国产 DAF-III 芳纶纤维的主体结构是聚酰胺苯并咪唑，表面上浆剂主要组分是脂肪族酯类低聚物。溶剂抽提去除了纤维表面大部分上浆剂，裸露的纤维本体存在制备过程中形成的沿纤维方向的大量沟壑；去除上浆剂后，复合材料的 ILSS 和弯曲强度分别提高了181.2%和56.20%。结论纤维表面上浆剂对纤维以及纤维增强的复合材料力学性能影响显著，纤维与树脂通过机械锚合和氢键作用改善界面粘接。
목적：연구국산방륜섬유 DAF-III 표면상장제적주요성분급기대복합재료계면성능적영향。방법용병동용제추제섬유일정시간，분석대비거제상장제전후적섬유화추제용액，병제비 DAF-III 증강적취삼서수지복합재료，측시복합재료적역학성능。결과국산 DAF-III 방륜섬유적주체결구시취선알분병미서，표면상장제주요조분시지방족지류저취물。용제추제거제료섬유표면대부분상장제，라로적섬유본체존재제비과정중형성적연섬유방향적대량구학；거제상장제후，복합재료적 ILSS 화만곡강도분별제고료181.2%화56.20%。결론섬유표면상장제대섬유이급섬유증강적복합재료역학성능영향현저，섬유여수지통과궤계묘합화경건작용개선계면점접。
Objective To investigate the main component of the domestic aramid fiber (DAF-III)sizing agents and its effect on the interfacial properties of composites. Methods The fibers were extracted by acetone for a certain period of time. The extracts and fibers before and after extraction were characterized. The DAF-III reinforced polytriazole (PTA) composites were prepared, and the mechanical properties were tested. Results The results showed that the main molecular structure of domestic DAF-III and surface sizing agent were polyamide benzimidazole and aliphatic ester oligomer, respectively. The majority of the sizing agent was removed and plenty of grooves were formed along the axial direction on the exposed fiber consequently. The mechanical properties (ILSS and flexural strength) of desized fiber reinforced PTA resin composite were increased by 181. 2% and 56. 20% , comparing with those of the virgin sample. Conclusion The sizing agent had a remarkable impact on both fibers and mechanical properties of DAF-III reinforced PTA composite. The fiber interacted with PTA through the mechanical interlocking and hydrogen bond.