Effect of PVP loading on pervaporation performance of poly(vinyl alcohol) membranes for THF/water mixtures

Study of pervaporation for dehydration of caprolactam through blend NaAlg–poly(vinyl pyrrolidone) membranes on PAN supports

“…PVP is chosen as the additive to blend with NaAlg, with the aim of increasing the permeation flux without appreciably reducing the selectivity. Recently, many successful examples using blend membranes based on the PVP have been reported in the field of pervaporation for dehydration of organic solvents and separation of azeotropic mixtures, such as CS-PVP [19,20], PVA-PVP [21] and CA-PVP blend membranes [22]. To reduce excessive swelling, polymer blending is accompanied by crosslinking and annealing which can all strongly influence permeability or selectivity [23].…”

Pervaporation separation of isopropanol–water mixtures using mixed matrix blend membranes of poly(vinyl alcohol)/poly(vinyl pyrrolidone) loaded with phosphomolybdic acid

“…The Fourier Transform Infra Red (FTIR) of PMA and PMA-loaded blend membranes have been discussed before. 9,12,13 Xray diffraction data support the existence of free volume for a reduction in separation factor and increase of flux 14 ; also, the presence of PMA in the blend reduced the crystallinity of the matrix. The Scanning Electron Microscope (SEM) images indicated uniform distribution of filler particles, facilitating higher water transport.…”

Effect of core–shell structured modifier ACR on ASA/SAN/ACR ternary blends

“…4, some characteristic peaks were carried out for further analysis. The peaks at 1,735 and 2,238 cm -1 were associated with the stretching vibration of carbonyl (C=O) [20][21][22] and cyano (C:N) [23]. The bands at 701 and 1,602 cm -1 were characteristic peaks of single substituted phenyl ring and vibration of benzene skeletal ring, respectively [23][24][25].…”