Insights into the interfacial interactions governing dielectric and electrorheological behavior of halloysite/graphene oxide composite systems
Rheologica Acta, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s00397-026-01597-0
- Dergi Adı: Rheologica Acta
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, Academic Search Ultimate (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: Dielectric, Electrorheology, Graphene oxide, Halloysite, Primary interaction, Secondary interaction
- Gazi Üniversitesi Adresli: Evet
Özet
Electrorheological (ER) fluids are unique systems for investigating the response of dispersed particles in a non-conducting medium to external electric fields. The distribution of charge carriers in the particles under applied electric field, and its effect on the rheological behavior of a dispersion are of great importance in the materials science. In this study, halloysite and graphene oxide composites with primary and secondary interactions; (HNT/GO)P and (HNT/GO)S, were fabricated to investigate the effect of interaction type between components on the dielectric and ER properties in their silicon oil dispersions. Conductivity measurements showed that primary interactions in the (HNT/GO)P composite provide ten times higher conductivity and lower conduction activation energy due to the strong interactions. Additionally, dielectric analysis of dispersions indicated that although the secondary interactions lead to higher polarizability, the primary interactions provide very fast charge accumulation around interfaces. Furthermore, the strength of interparticle interactions significantly affected the ER flow response. As a result, the (HNT/GO)P/SO dispersion showed better ER performance under low electric field strengths. Electroactive viscoelastic properties also investigated and similar observations were obtained as better elastic behaviors with (HNT/GO)P/SO dispersion. These findings provide information about the relationship between interparticle forces and macroscopic ER properties, offering a useful strategy for designing advanced electroactive vibration damping composite materials.