In this study, suspensions of core–shell particles dispersed in a silicone oil were fabricated and their rheological properties were evaluated at different external electric field strengths. The core–shell-structured composite materials were synthesized by coating poly(o-toluidine) (PoT) shells on the surfaces of silica particles. The silica particles were extracted from rice husk through acid and thermal treatments. The silica particles were then modified with (3-trimethoxysilyl)propyl methacrylate prior to the coating with the PoT shells. The chemical structures, morphologies, particle sizes, and elemental distributions of both silica and core–shell particles were investigated using scanning electron microscopy, Fourier-transform infrared spectroscopy, and energy-dispersive X-ray spectroscopy. Additionally, the rheological properties, chain formations, and dielectric properties of the suspensions were analyzed using rotational rheometry, optical microscopy, and an inductance–capacitance–resistance meter. The shear stress increased with the electric field strength along with the electro-rheological efficiency. The plot of the yield stress against the applied electric field strength exhibited a slope of 1.5. The fabricated core–shell particles are environment-friendly and are promising materials for applications in next-generation electro-rheological fluids.
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Yin J, Wang X, Chang R, Zhao X (2012) Polyaniline decorated graphene sheet suspension with enhanced electrorheology. Soft Matter 8:294–297
Shin K, Kim D, Cho JC, Lim HS, Kim JW, Suh KD (2012) Monodisperse conducting colloidal dipoles with symmetric dimer structure for enhancing electrorheology properties. J Colloid Interface Sci 374:18–24
Gong X, Wang L, Wen W (2009) Design and fabrication of monodisperse hollow titania microspheres from a microfluidic droplet-template. Chem Commun 31:4690–4692
Sedlacik M, Mrlik M, Kozakova Z, Pavlinek V, Kuritka I (2013) Synthesis and electrorheology of rod-like titanium oxide particles prepared via microwave-assisted molten-salt method. Colloid Polym Sci 291:1105–1111
Wang B, Yin Y, Liu C, Yu S, Chen K (2013) Synthesis of flower-like BaTiO3/Fe3O4 hierarchically structured particles and their electrorheological and magnetic properties. Dalton Trans 42:10042–10055
Cheng Y, Guo J, Liu X, Sun A, Xu G, Cui P (2011) Preparation of uniform titania microspheres with good electrorheological performance and their size effect. J Mater Chem 21:5051–5056
Wu J, Jin T, Liu F, Guo J, Cheng Y, Xu G (2014) Formamide-modified titanium oxide nanoparticles with high electrorheological activity. RSC Adv 4:29622–29628
Tang J, Wen X, Liu Z, Wang J, Zhang P (2018) Synthesis and electrorheological performances of 2D PANI/TiO2 nanosheets. Colloids Surf A Physicochem Eng Asp 552:24–31
Xinrong S, Aiqing H, Nianyuan T, Dan M, Yuanbin L (2011) Influence of amphiprotic groups on the electrorheological behavior of polymers. Mater Chem Phys 126:369–374
He K, Wen Q, Wang C, Wang B, Yu S, Hao C, Chen K (2017) Synthesis of anatase TiO2 with exposed (100) facets and enhanced electrorheological activity. Soft Matter 13:7879–7889
He K, Wen Q, Wang C, Wang B, Yu S, Hao C, Chen K (2017) The preparation and electrorheological behavior of bowl-like titanium oxide nanoparticles. Soft Matter 13:7677–7688
Liu W, Xie Z, Lu Y, Gao M, Zhang W, Gao L (2019) Fabrication and excellent electroresponsive properties of ideal PMMA@BaTiO3 composite particles. RSC Adv 9:12404–12414
Sung BH, Ko YG, Choi US (2007) Novel synthesis and electrorheological properties of monodispersed submicron-sized hollow polyaniline dicarboxylate salt form suspensions. Colloids Surf A Physicochem Eng Asp 292:217–223
Wang B, Tian X, He K, Ma L, Yu S, Hao C, Chen K, Lei Q (2016) Hollow PAQR nanostructure and its smart electrorheological activity. Polymer 83:129–137
Tilki T, Yavuz M, Karabacak C, Cabuk M, Ulutürk M (2010) Investigation of electrorheological properties of biodegradable modified cellulose/corn oil suspensions. Carbohydr Res 345:672–679
Winslow WM (1949) Induced fibration of suspensions. J Appl Phys 20:1137
Zukoski CF (1993) Material properties and the electrorheological response. Annu Rev Mater Sci 23:45–78
Block H, Kelly JP (1988) Electro-rheology. J Phys D Appl Phys 21:1661
Hao T (2001) Electrorheological fluids. Adv Mater 13:1847–1857
Hao T, Kawai A, Ikazaki F (1998) Mechanism of the electrorheological effect: evidence from the conductive, dielectric, and surface characteristics of water-free electrorheological fluids. Langmuir 14:1256–1262
Yethiraj A (2007) Tunable colloids: control of colloidal phase transitions with tunable interactions. Soft Matter 3:1099–1115
Stokes JR, Frith WJ (2008) Rheology of gelling and yielding soft matter systems. Soft Matter 4:1133–1140
Yilmaz H, Unal HI, Sari B (2007) Synthesis, characterization and electrorheological properties of poly(o-toluidine)/Zn conducting composites. J Appl Polym Sci 103:1058–1065
Zhou Y, Qin ZY, Li L, Zhang Y, Wei YL, Wang LF, Zhu MF (2010) Polyaniline/multi-walled carbon nanotube composites with core–shell structures as supercapacitor electrode materials. Electrochim Acta 55:3904–3908
Ozkan S, Unal HI, Yılmaz E, Suludere Z (2015) Electrokinetic and antibacterial properties of needle like TiO2/polyrhodanine core/shell hybrid nanostructures. J Appl Polym Sci 132:41554
Yeh JM, Kuo TH, Huang HJ, Chang KC, Chang MY, Yang JC (2007) Preparation and characterization of poly(o-methoxyaniline)/Na+–MMT clay nanocomposite via emulsion polymerization: electrochemical studies of corrosion protection. Eur Polym J 43:1624–1634
Dey A, De S, De A, De SK (2004) Characterization and dielectric properties of polyaniline–TiO2 nanocomposites. Nanotechnology 15:1277–1283
Wen Q, He K, Wang C, Wang B, Yu S, Hao C, Chen K (2018) Clip-like polyaniline nanofibers synthesized by an insitu chemical oxidative polymerization and its strong electrorheological behavior. Synth Met 239:1–12
Wen Q, Ma L, Wang C, Wang B, Han R, Hao C, Chen K (2019) Preparation of core–shell structured metal–organic framework@PANI nanocomposite and its electrorheological properties. RSC Adv 9:14520–14530
Tang J, Wen X, Liu Z, Wang J, Zhang P (2018) Synthesis and electrorheological performances of 2D PANI/TiO2 nanosheets. Colloid Surf A: Physicochem Eng Asp 552:24–31
Yin J, Zhao X, Xia X, Xiang L, Qiao Y (2008) Electrorheological fluids based on nano-fibrous polyaniline. Polymer 49:4413–4419
Gercek B, Yavuz M, Yilmaz H, Sari B, Unala HI (2007) Comparison of electrorheological properties of some polyaniline derivatives. Colloids Surf A Physicochem Eng Asp 299:124–132
Huiru MA, Jianguo G, Runzhang Y (2005) Electrorheological properties of suspensions of PAn–PEO–PAn triblock copolymer particles. J Wuhan Univ Technol Mater Sci Ed 20:43–45
Zhang L, Su K, Li X (2003) Electrorheological effects of polyaniline-type electrorheological fluids. J Appl Polym Sci 87:733–740
Liu J, Wen X, Liu Z, Tan Y, Yang S, Zhang P (2015) Electrorheological performances of poly(o-toluidine) and p-toluenesulfonic acid doped poly(o-toluidine) suspensions. Colloid Polym Sci 293:1391–1400
This research was funded by the Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 104.02-2017.15.
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Bach, Q., Vu, C.M., Vu, H.T. et al. Suspension of poly(o-toluidine)-coated silica-based core–shell-structured composite in silicone oil: fabrication and rheological properties at different external electric field strengths. Polym. Bull. 77, 3563–3576 (2020). https://doi.org/10.1007/s00289-019-02933-6
- Rice husk
- Silanized silica
- Electro-rheological fluid
- Rheological properties
- Silicone oil
- Core–shell particle