The effects of thermally stable titanium silicon oxide nanoparticles on structure and performance of cellulose acetate ultrafiltration membranes

Dasgupta, Jhilly; Chakraborty, Sudip; Sikder, Jaya; Kumar, Ramesh; Pal, Dipankar; Curcio, Stefano; Drioli, Enrico

doi:10.1016/j.seppur.2014.06.035

Cited by 110 publications

(41 citation statements)

References 44 publications

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“…[18][19][20] The peaks identified at 1374 and 906 cm À1 were correlated to CH 3 and C-H in plane and out of plane bending vibrations, respectively. [19,21] AC/GO composite membranes spectra exhibited the same pattern as that of AC, with no discernible shifts or alterations of the AC typical absorbance peaks. This could be because of the hardly detectable amount of GO dispersed within the polymer matrix as well as the overlapping of GO and AC main absorbance peaks.…”

Section: Methodsmentioning

confidence: 73%

Fabrication of cellulose triacetate/graphene oxide porous membrane

Ioniță

Crică

Voicu

et al. 2015

Polym. Adv. Technol.

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Cellulose triacetate (AC)/graphene oxide (GO) porous membranes were successfully fabricated by combining ultrasonication and phase inversion method. The structures and morphologies of the resultant composite membranes were investigated by X-ray diffraction (XRD), scanning electron microscopy, and transmission electron microscopy, respectively. Microscopic and X-ray diffraction measurements revealed that GO sheets were uniformly dispersed within the AC matrix. The pore size and structure were modulated by changing GO concentration from 0.25 to 1 wt%. Membrane thermal properties were also studied. Among all tested membranes, the most favorable GO amount was 1 wt%, giving Td 3% of 274°C, which represents a 22°C enhancement compared with AC. Conversely, the membranes showed improved barrier properties against water and ethanol. The decrease of both ethanol and water fluxes was assigned to the stabilization of composite membrane structure, as a result of GO progressive addition. Bovine serum albumin rejection assay indicated an increasing from 78% in the case of CA membrane to 99% in the case of CA/GO 1 wt% of the rejection degree after 90 min.

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Section: Methodsmentioning

confidence: 73%

Fabrication of cellulose triacetate/graphene oxide porous membrane

Ioniță

Crică

Voicu

et al. 2015

Polym. Adv. Technol.

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“…Zeta potential greatly influences membranes performance and determines extent of fouling [220][221][222][223]. Higher zeta potential means less chance of fouling due to greater repulsion between negative surface charge of membrane and hydrophobic foulants (e.g.…”

Section: Zeta Potential Analysismentioning

confidence: 99%

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Zahid¹,

Rashid²,

Akram³

et al. 2018

J Membr Sci Technol

184

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During last few decades, membrane technology has emerged as an efficient technique over conventional methods due to its high removal capacity, ease in operation and cost effectiveness for wastewater treatment and production of clean water. Membrane based separations are commonly based on polymeric membranes because of their higher flexibility, easily pore forming mechanism, low cost and smaller space for installation as compared to inorganic membranes. Commonly employed membrane fabrication phase inversion method has been shortly reviewed in this article. Major limitation of membrane based separations is fouling and polymeric membranes being hydrophobic in nature are more prone to fouling. Fouling is a deposition of various colloidal particles, macromolecules (polysaccharides, proteins), salts etc. on membrane surface and within pores thus impedes membrane performance, reduces flux and results in high cost. Modification of polymeric membranes due to its tailoring ability with nanomaterials such as metal based and carbon based results in polymeric nano-composite membranes with high antifouling characteristics. Nanomaterials impart high selectivity, permeability, hydrophilicity, thermal stability, mechanical strength, and antibacterial properties to polymeric membranes via blending, coating etc. modification methods. Characterization techniques has also discussed in later section for studying morphological properties and performance of polymer nano-composite membranes. Graphical Abstract

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“…Therefore, these apparent shortcomings in the CA polymeric matrix can be improved by either incorporating inorganic filler as additives, or by blending with some other polymers. In this regard, various kinds of inorganic fillers, such as zeolites [18], transition metal complexes [19], alumina, titania, multi-walled carbon nano tube (MWCN) [20,21], titanium silicon oxide (TiSiO 4 ) nanoparticles [22] and silicon species [23], have been utilized previously as additives in CA polymer to enhance its structural properties. Moreover, some polymers, such as poly (methyl methyacrylate) [17,24] and poly (ethylene glycol) [25], have also been blended with CA, and a cellulose derivative containing an adamantine group [26] was synthesized to overcome the deficiency in the CA matrix.…”

Section: Introductionmentioning

confidence: 99%

Comparison of silica and novel functionalized silica-based cellulose acetate hybrid membranes in gas permeation study

et al. 2015

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Cellulose acetate (CA) is a widely applied glassy polymer in the preparation of gas separation membranes. In the present study, hybrid membranes were prepared by incorporating silica (Si) and silica functionalized with ptetranitrocalix[4]arene (Si-CL) into the CA matrix, and their gas permeation abilities were explored with regard to CO 2 , N 2 and CH 4 gases. The diffusion-induced phase separation (DIPS) method was adopted to make pure CA, CA/Si, and CA/Si-CL hybrid membranes. The concentration of Si-CL was varied as 10 wt%, 20 wt% and 30 wt% in the hybrid membranes. The analytical techniques employed for membrane characterization were Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), and X ray-diffraction (XRD) analysis. The proper interaction of Si and Si-CL was confirmed by FTIR analysis. However, the homogenous surface textures of CA/Si, and CA/Si-CL hybrid membranes were evaluated through SEM. Furthermore, AFM analysis was performed to examine the surface roughness of these hybrid membranes. The changes in the crystallinity of CA were also examined by XRD analysis after adding Si and Si-CL. Moreover, the tensile strength of the CA/Si hybrid membrane was found to be better than that of CA/Si-CL hybrid membranes. CO 2 , CH 4 and N 2 gases were used for gas permeation experiments at 400 kPa. Among CO 2 and CH 4 gases, the permeability of N 2 was high in CA/Si-CL hybrid membranes, and N 2 /CO 2 selectivity of these membranes was 22.6.

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The effects of thermally stable titanium silicon oxide nanoparticles on structure and performance of cellulose acetate ultrafiltration membranes

Cited by 110 publications

References 44 publications

Fabrication of cellulose triacetate/graphene oxide porous membrane

Fabrication of cellulose triacetate/graphene oxide porous membrane

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Comparison of silica and novel functionalized silica-based cellulose acetate hybrid membranes in gas permeation study

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