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对纳米氧化铝(nano-Al2O3)/环氧树脂(EP)/二氨基二苯砜(DDS)体系的性能进行了研究,考察了nano-Al2O3用量及制备工艺对复合材料力学性能的影响,并通过扫描电镜(SEM)观察了nano-Al2O3/EP/DDS复合材料的断面形貌。结果表明:当w(nano-Al2O3)=5份时,复合材料的力学性能相对最高;经偶联剂和超声波分散处理后制取的nano-Al2O3/EP/DDS复合材料,其力学性能最好,高温剪切强度提高了4.01MPa,弯曲强度提高了7.63MPa,弯曲挠度提高了0.65mm,拉伸强度提高了9.30MPa,断裂伸长率提高了2.04%;SEM分析结果表明,一定量的nano-Al2O3可以明显提高EP的韧性。
The properties of nano-Al2O3 / epoxy / diaminodiphenyl sulfone (DDS) system were investigated. The effects of nano-Al2O3 dosage and preparation process on the mechanical properties of the composites were investigated. The cross-sectional morphology of nano-Al2O3 / EP / DDS composites was observed by scanning electron microscopy (SEM). The results show that the mechanical properties of composites are the highest when w (nano-Al2O3) = 5 parts, and nano-Al2O3 / EP / DDS composites prepared by dispersive coupling and ultrasonic treatment have the best mechanical properties , High temperature shear strength increased 4.01MPa, flexural strength increased 7.63MPa, bending deflection increased 0.65mm, tensile strength increased 9.30MPa, elongation at break increased 2.04%; SEM analysis showed that a certain amount of nano -Al2O3 can significantly improve the toughness of EP.