Modification of cellulose acetate nanofibers with PVP/Ag addition

Kendouli, Souad; Khalfallah, O.; Sobti, N.; Bensouissi, Abdelfattah; Avcı, Ahmet; Eskizeybek, Volkan; Achour, S.

doi:10.1016/j.mssp.2014.03.010

Cited by 32 publications

(24 citation statements)

References 16 publications

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“…In the present work, there was not observed no new Ag related bands, similar observation was reported by Kendouli et al . This may be that due to the very low silver content, they are below the FTIR detection limit or the silver related band overlaps with the carbonyl group peak.…”

Section: Resultssupporting

confidence: 91%

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The role of silver nanoparticles on mixed matrix Ag/cellulose acetate asymmetric membranes

et al. 2015

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Mixed matrix asymmetric membranes were prepared by the addition of silver nanoparticles to cellulose acetate/acetone/formamide casting solutions with ratios acetone/formamide varying from 1.44 to 2.77 to prepare ultrafiltration/nanofiltration membranes covering a wide range of hydraulic permeabilities. Binding of the silver nanoparticles to the polymer matrix is revealed through comparison of the FTIR spectra of the cellulose acetate and the Ag/cellulose acetate membranes. In the later, there is a decrease of the ratio between the bands intensities at 2,000–2,500 cm−1. Membrane surface charge of the mixed matrix membranes varies with the pore size and pH, and when compared with cellulose acetate membranes there is a decrease of the negative surface charge densities. The silver nanoparticles in all mixed matrix membranes results in an enhancement of the hydraulic permeabilities, ranging from 10.8 kg m−2 h−1 bar−1 to 67.1 kg m−2 h−1 bar−1. POLYM. COMPOS., 38:32–39, 2017. © 2015 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 91%

“…Major changes occur at 2,000–2,500 cm −1 , where the ratio between CO and COH band intensities decrease with the presence of silver nanoparticles. As reported by Kendouli et al , for cellulose acetate nanofibers, the decrease of CO stretching is due to the dissociation of the carbonyl.…”

Section: Resultssupporting

confidence: 60%

The role of silver nanoparticles on mixed matrix Ag/cellulose acetate asymmetric membranes

et al. 2015

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“…[22] According to the literature, the Raman spectrum of AC is composed by peaks located near 2946, 1760, and 1380 cm À1 , assigned to the C-H, C¼O, and pyranose backbone molecular vibrations. [19,23] Further on, the AC/GO composite membranes spectra (Fig. 2b-d) combine the GO specific peaks with new small bands emerged at 1735 and 2930 cm À1 , which were assigned to the previously mentioned AC chemical groups.…”

Section: Raman Spectroscopy Studiesmentioning

confidence: 81%

“…1b) is composed by three strong peaks located at~1040,~1235m and~1739 cm À1 assigned to asymmetric C-O-C (pyranose groups), C-O (COCH 3 linked to the O originated from pyranose ÀOH), and C¼O (ester) stretching vibrations. [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.…”

Section: Methodsmentioning

confidence: 98%

“…[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: 98%

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Fabrication of cellulose triacetate/graphene oxide porous membrane

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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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