Rheology of colloidal particles in lyotropic hexagonal liquid crystals: the role of particle loading, shape, and phase transition kinetics

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dc.contributor.author Kulkarni, Siddharth Vijay
dc.contributor.author Thareja, Prachi
dc.date.accessioned 2015-12-28T12:21:21Z
dc.date.available 2015-12-28T12:21:21Z
dc.date.issued 2016-01
dc.identifier.citation Kulkarni, Siddharth and Thareja, Prachi, “Rheology of colloidal particles in lyotropic hexagonal liquid crystals: the role of particle loading, shape, and phase transition kinetics”, Rheologica Acta, DOI: 10.1007/s00397-015-0896-1, vol. 55, no. 1, pp. 23-36, Jan. 2016.
dc.identifier.uri http://dx.doi.org/10.1007/s00397-015-0896-1
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/2032
dc.description.abstract The rheology of self-assembled elongated iron oxyhydroxide (FeOOH) and spherical silica (SiO2) particles in hexagonal (H1) liquid crystal (LC) phase of water and non-ionic surfactant C12E9 is investigated by varying particle concentration and cooling rate. The rheology data shows that both SiO2/H1 and FeOOH/ H1 LC composites exhibit a higher G′ when compared to the particle-free H1 phase, with increasing particle loading and cooling rate. FeOOH particles improve G′ of the H1 phase more significantly than SiO2 particles due to the formation of an interconnected network at H1 domain boundaries at cooling rates of 1 and 2 ∘C/min. We hypothesize that self-assembly of particles at domain boundaries leads to a decreased mobility of defects causing an increase in elasticity of particle-laden H1 phase. Dynamic strain sweep and creep experiments show a non-linear stress–strain relationship attributed to the alignment of micellar cylindrical rods under shear. en_US
dc.description.statementofresponsibility by Siddharth Kulkarni and Prachi Thareja
dc.format.extent vol. 55, no. 1, pp. 23-36
dc.language.iso en_US en_US
dc.publisher Springer Berlin Heidelberg en_US
dc.subject Hexagonal phase en_US
dc.subject Liquid crystals en_US
dc.subject Rheology en_US
dc.subject Colloidal particles en_US
dc.title Rheology of colloidal particles in lyotropic hexagonal liquid crystals: the role of particle loading, shape, and phase transition kinetics en_US
dc.type Article en_US
dc.relation.journal Rheologica Acta


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