Structure and pervaporation performance of novel quaternized poly(vinyl alcohol)/γ‐aminopropyltriethoxysilane hybrid membranes

Zhang, Qiu Gen; Meng, Xiao Juan; Broadwell, Ian

doi:10.1002/app.32504

Cited by 15 publications

(6 citation statements)

References 27 publications

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“…The peak at 3750 cm −1 corresponds to the presence of Si-OH at the terminal end of the Si-O-Si network. These peaks are consistent with earlier research [ 19 , 20 , 21 ].…”

Section: Resultssupporting

confidence: 93%

Synthesis and Characterization of Electrical and Thermal Conductive Vinyltriethoxysilane Functionalized Graphene Oxide/Poly (Methyl Methacrylate) Nanocomposite Films

et al. 2023

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The present study is an attempt to improve thermal, mechanical and electrical properties of poly (methyl methacrylate) (PMMA). For this purpose, vinyltriethoxysilane (VTES) was grafted covalently on the surface of graphene oxide (GO). This VTES functionalized graphene oxide (VGO) was dispersed in the PMMA matrix using the solution casting method. The morphology of the resultant PMMA/VGO nanocomposites was analyzed by SEM indicating well-dispersed VGO in the PMMA matrix. Thermal stability, tensile strength and thermal conductivity increased by 90%, 91% and 75%, respectively, whereas volume electrical resistivity and surface electrical resistivity reduced to 9.45 × 105 Ω/cm and 5.45 × 107 Ω/cm2, respectively.

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“…The peak at 3750 cm −1 corresponds to the presence of Si-OH at the terminal end of the Si-O-Si network. These peaks are consistent with earlier research [ 19 , 20 , 21 ].…”

Section: Resultssupporting

confidence: 93%

Synthesis and Characterization of Electrical and Thermal Conductive Vinyltriethoxysilane Functionalized Graphene Oxide/Poly (Methyl Methacrylate) Nanocomposite Films

et al. 2023

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“…The thermal stability of the PVA/VTES hybrid membranes was studied by TG and DTG, as shown in Figure 5. Two weight loss regions and two peaks around 260 and 450°C are found in DTG curves originated from the degradation of CO bonds and the cleavage of the backbones of PVA chains, respectively 34. And the introduction of VTES improved the thermal stability of PVA membranes from the peak top temperature of DTG curves around 260°C.…”

Section: Resultsmentioning

confidence: 95%

“…In previous work, we have used γ‐aminopropyl‐triethoxysilane (APTEOS) and 1,2‐bis(triethoxysilyl)ethane to modify PVA, quaternized PVA, and CS membranes. The resulting hybrid membranes were used for dehydration of alcohol solutions 7, 32–34. They exhibit low swelling in ethanol aqueous solution, and high permeation flux and water permselectivity.…”

Section: Introductionmentioning

confidence: 99%

Pervaporation dehydration of water/ethanol/ethyl acetate mixtures using poly(vinyl alcohol)–silica hybrid membranes

Zhang

et al. 2012

J of Applied Polymer Sci

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The novel organic-inorganic hybrid membranes were prepared from poly(vinyl alcohol) (PVA) and vinyltriethoxysilane (VTES). They were characterized using Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), and contact angle metering. The as-prepared membranes are formed at a molecular scale at a low VTES content. Aggregations in the surface of the as-prepared membranes were clearly evident above 18.43 wt % VTES loading. The introduction of VTES into the PVA matrix resulted in a decrease in the crystalline and an increase in compactness and thermal stability of the as-prepared membranes. Silica hybridization reduced the swelling of the as-prepared membranes in water/ethanol/ethyl acetate mixtures, decreased the permeation flux, and remarkably enhanced water permselectivity in pervaporation dehydration of ethanol/ethyl acetate aqueous solution. The hybrid membrane with 24.04 wt % VTES has the highest separation factor of 1079 and permeation flux of 540 g m À2 h À1 .

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“…Similar membranes were later used for acid recovery [ 57 ]. Hybrid quaternized PVA (Q-PVA) based membranes were also used for the pervaporation dehydration of ethanol [ 58 ]. Q-PVA was obtained by reaction of PVA with glycidyltrimethylammonium chloride (GTMA-Cl) followed by cross-link formation with glutaraldehyde (GA).…”

Section: Membranes For Diffusion Dialysis (Dd) and Related Fieldsmentioning

confidence: 99%

Silica Containing Composite Anion Exchange Membranes by Sol–Gel Synthesis: A Short Review

et al. 2021

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This short review summarizes the literature on composite anion exchange membranes (AEM) containing an organo-silica network formed by sol–gel chemistry. The article covers AEM for diffusion dialysis (DD), for electrochemical energy technologies including fuel cells and redox flow batteries, and for electrodialysis. By applying a vast variety of organically modified silica compounds (ORMOSIL), many composite AEM reported in the last 15 years are based on poly (vinylalcohol) (PVA) or poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) used as polymer matrix. The most stringent requirements are high permselectivity and water flux for DD membranes, while high ionic conductivity is essential for electrochemical applications. Furthermore, the alkaline stability of AEM for fuel cell applications remains a challenging problem that is not yet solved. Possible future topics of investigation on composite AEM containing an organo-silica network are also discussed.

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Structure and pervaporation performance of novel quaternized poly(vinyl alcohol)/γ‐aminopropyltriethoxysilane hybrid membranes

Cited by 15 publications

References 27 publications

Synthesis and Characterization of Electrical and Thermal Conductive Vinyltriethoxysilane Functionalized Graphene Oxide/Poly (Methyl Methacrylate) Nanocomposite Films

Synthesis and Characterization of Electrical and Thermal Conductive Vinyltriethoxysilane Functionalized Graphene Oxide/Poly (Methyl Methacrylate) Nanocomposite Films

Pervaporation dehydration of water/ethanol/ethyl acetate mixtures using poly(vinyl alcohol)–silica hybrid membranes

Silica Containing Composite Anion Exchange Membranes by Sol–Gel Synthesis: A Short Review

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