期刊
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
卷 30, 期 3, 页码 911-919出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TDEI.2023.3266310
关键词
Optical fiber devices; Optical fiber dispersion; Powders; Optical fiber polarization; Epoxy resins; Electric breakdown; Thermal stability; epoxy (EP) resins; fiber reinforced plastics; insulation testing; polymers; scanning electron microscopy
In this study, dopamine and silane coupling agents were used to treat aramid fiber powder, and the treated fiber powder was combined with epoxy resin to form a composite material. The results showed that the treated composite material had higher breakdown strength and volume conductivity, as well as lower interface charge attenuation rate and volume conductivity.
Epoxy (EP) resin is widely used in the field of electrical insulation. Different fillers can affect the performance of EP resin in different aspects. In this work, dopamine and silane coupling agents were adopted to treat aramid fiber powder (AP). The untreated AP and treated AP (KH560-dopamine (KD)-AP) were formed into a composite with EP resin. The trap distribution, breakdown strength, volume conductivity, and elastic modulus of aramid fiber/EP composites were fully investigated. AP doping leads to serious interface defects. The breakdown strength of KD-AP-EP increased by 39% compared with that of AP-EP. Surface potential decay (ISPD) was adopted to measure the carrier trap characteristics, and the addition of KD-AP leads to an increase in deep traps within the composites, which helps to reduce the number of migrating charges, resulting in a lower interface charge attenuation rate and volume conductivity. KD-AP-EP can also obtain higher elastic modulus with lower dosage.
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