Liquid crystal suspensions of carbon nanotubes assisted by organically modified Laponite nanoplatelets

Abstract

A B S T R A C TWe present a simple and effective approach for dispersion of carbon nanotubes (CNTs) into

A hybrid of hexakis(hexyloxy) triphenylene and synthetic saponite

“…The thermal and luminescence behaviors of HAT6 were successfully tailored by organizing HAT6 in the organically modified clay mineral. The preparation of various clay mineral-nematic liquid crystal nanocomposites has been reported, however, the amount of layered silicates was very low (Kawasumi et al, 1998(Kawasumi et al, , 1999Chashechnikova et al, 2005;Huang et al, 2005;Tsai et al, 2006Tsai et al, , 2010Chepikov et al, 2012;Yaroshchuk et al, 2014). Although, the loading amount of discotic liquid crystal used in the present work was not so large, when compared with those previous reports, the unique nature may lead to a way to elucidate the liquid crystal-clay mineral interactions.…”

“…Attempts have been made to investigate clay mineral (montmorillonite)-nematic liquid crystal nanocomposites for a memory effect (Kawasumi et al, 1998(Kawasumi et al, , 1999Chashechnikova et al, 2005). Dispersion of inorganic nanomaterials such as carbon nanotube, nanosheet of layered silicates, as well as other nanoparticles in liquid crystals (LC) and polymer-dispersed liquid crystals (PDLC) is expected to modify their physical and optical properties for broad prospects of their applications such as electrically switchable windows, light shutters, flexible display, and so on (Huang et al, 2005;Tsai et al, 2006Tsai et al, , 2010Chepikov et al, 2012;Yaroshchuk et al, 2014). To enhance gas diffusion barrier property, liquid crystalline diol hydrochlorides were intercalated into the interlayer space of montmorillonite by ion exchange reaction (Brnardić et al, 2008).…”

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

“…The effective approach for dispersion of MWCNTs into liquid crystals (LC), suitable for a wide range of concentrations (C ≤ 0.1 wt%) was proposed [257]. It consists in doping of LC + MWCNT suspensions with organo-modified laponite (LapO).…”

Nano-Objects and Ions in Liquid Crystals: Ion Trapping Effect and Related Phenomena

“…Table 2 provides a short summary of the reported effects. As can be seen, both decrease [118,119,[121][122][123][124][125][126][127][143][144][145][146][147][148][149][150][151][152] and increase [105,120,[128][129][130][131][132][133][134][135][136][137][138][139][140][141][142][150][151][152][153] in the electrical conductivity of liquid crystals doped with carbon-based nanomaterials were reported.…”

“…The electrical properties of liquid crystals doped with carbon nanotubes (CNT) were explored in numerous papers [105,116,. The majority of these manuscripts [105,116,117,[128][129][130][131][132][133][134][135][136][137][138][139][140][141][142] report the enhancement of the electrical conductivity  of liquid crystals doped with carbon nanotubes. The increase in  is associated with the percolation phenomenon and high intrinsic electrical conductivity of carbon nanotubes: a sharp transition from the ionic conductivity to the dominating charge hopping conductivity occurs at a certain concentration called the percolation concentration [105,116].…”