Study of template-free synthesis hierarchical m-ZrO2 nanorods by hydrothermal method

Khan, Shad Ahmad; Fu, Zhengyi; Rehman, Sahibzada Shakir; Asif, Muhammad; Wang, Weimin; Wang, Hao

doi:10.1016/j.powtec.2014.02.012

Cited by 19 publications

(1 citation statement)

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“…Nanoparticles of zirconium dioxide (ZrO 2 ) synthesized via the hydrothermal method can be obtained in different shapes [ 15 , 16 , 17 ]. They can operate as inorganic fillers, which regulate the physico-chemical properties of polymer materials [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Structure and Transport Properties of Mixed-Matrix Membranes Based on Polyimides with ZrO2 Nanostars

et al. 2016

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Abstract:Mixed-matrix membranes based on amorphous and semi-crystalline polyimides with zirconium dioxide (ZrO 2 ) nanostars were synthesized. Amorphous poly(4,4 -oxydiphenylenepyromellitimide) and semi-crystalline polyimide prepared from 1,4-bis(4-aminophenoxy)benzene and 4,4'-oxydiphthalic anhydride were used. The effect of ZrO 2 nanostars on the structure and morphology of nanocomposite membranes was studied by wide-angle X-ray scattering, scanning electron microscopy, atomic force microscopy, and contact angle measurements. Thermal properties and stability were investigated by thermogravimetric analysis and differential scanning calorimetry. Transport properties of hybrid membranes containing 5 wt % ZrO 2 were tested for pervaporation of a mixture of butanol-water with 10 wt % H 2 O content. It was found that a significant amount of the ZrO 2 added to the semi-crystalline polyimide is encapsulated inside spherulites. Therefore, the beneficial influence of inorganic filler on the selectivity of mixed-matrix membrane with respect to water was hampered. Mixed-matrix membranes based on amorphous polymer demonstrated the best performance, because water molecules had higher access to inorganic particles.

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