Acid catalysed cross-linking of poly vinyl alcohol (PVA) by glutaraldehyde: effect of crosslink density on the characteristics of PVA membranes used in single chambered microbial fuel cells

Rudra, Ruchira; Kumar, Vikash; Kundu, Patit Paban

doi:10.1039/c5ra16068e

Cited by 182 publications

(114 citation statements)

References 43 publications

(46 reference statements)

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“…[34] The peak at 1,733 cm −1 is related to stretching vibrations of C=O groups, which come from the residual vinyl acetate repeat units in the PVA [26] and the residual acetyl groups in the CS. [31] For the crosslinked PVA/CS samples, the peaks at 1,598 cm −1 corresponded to NH 2 was almost eliminated, which can be ascribed to the amino group in CS was consumed due to GA crosslinking. The absorption peak at 1,598 cm −1 was related to the amide type II of CS as well as the NH 2 blending vibration.…”

Section: Results and Discussion 31 | Atr-ftir Of Crosslinked Pva/cmentioning

confidence: 93%

“…[31] The process of crosslinking was performed by putting nanofibers into 20 ml crosslinking agent solution with varying concentrations of GA (0.1%, 0.3% and 0.5%) and keeping 30 min for crosslinking at room temperature. In this study, the isopropyl was used as the main crosslinking solvent because it will not lead to destroy of the morphology as a non-solvent of the PVA/CS composite nanofibers, which is different from the method of previous study.…”

Section: Preparation Of Crosslinked Pva/cs Composite Nanofibersmentioning

confidence: 99%

“…The measured mechanical properties including Young's modulus, tensile strength and elongation at break are summarized in Table 1. [31] DMA experiments can present valuable data on phase transitions and viscoelastic behavior of polymer. [31] DMA experiments can present valuable data on phase transitions and viscoelastic behavior of polymer.…”

Section: Morphologymentioning

confidence: 99%

“…PVA is a biocompatible, nontoxic, water permeable polymer with great electrospinnability, it or its blending with nature polymer has been widely applied in drug delivery system. Additionally, the acid catalysed crosslinking of PVA membrane with varying concentration of GA was analyzed by Rudra et al [31] Although PVA, CS, PVA/CS, and their corresponding crosslinked films, nanofibers, and microspheres were prepared and characterized for a variety of application, few papers are available on the study of GA crosslinked PVA/ CS composite nanofiber loaded with water soluble drug of ampicillin sodium for transdermal drug delivery application. Vidyalakshmi et al [21] have evaluated the PVA/CS blend films fabricated by casting method for drug delivery.…”

Section: Introductionmentioning

confidence: 99%

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Electrospinning and crosslinking of polyvinyl alcohol/chitosan composite nanofiber for transdermal drug delivery

et al. 2017

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The drug-loaded polyvinyl alcohol (PVA)/chitosan (CS) composite nanofibers intended to be used as matrix for transdermal drug delivery were fabricated by electrospinning, and then crosslinked through glulataraldehyde (GA). The morphology, chemical structure, thermal behavior, mechanical properties, hydrophilicity and drug release properties of drug-loaded PVA/CS composite nanofibers before and after crosslinking were characterized. The results showed that the morphology of PVA/CS composite nanofibers was not been destroyed in both crosslinking and in vitro drug release process. The Young's modulus, tensile strength, thermal properties and hydrophobicity of crosslinked PVA/CS composite nanofibers significantly increased in comparison with those of PVA/CS (without crosslinking) due to the formation of crosslinking network structure. In vitro release studies showed that crosslinked PVA/ CS composite nanofibers had lower drug release rate and smaller amount of drug burst release than that of PVA/CS. According to release exponent "n", the release of ampicillin sodium from crosslinked PVA/CS composite nanofibers fit to the Fickian diffusion mechanism. Those results demonstrate the potential utilization of crosslinked PVA/CS composite nanofibers as a transdermal drug delivery system. K E Y W O R D Schitosan (CS), crosslinking, drug delivery, electrospinning, polyvinyl alcohol (PVA) How to cite this article: Cui Z, Zheng Z, Lin L, et al. Electrospinning and crosslinking of polyvinyl alcohol/ chitosan composite nanofiber for transdermal drug delivery.

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Section: Results and Discussion 31 | Atr-ftir Of Crosslinked Pva/cmentioning

confidence: 93%

Section: Preparation Of Crosslinked Pva/cs Composite Nanofibersmentioning

confidence: 99%

Section: Morphologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrospinning and crosslinking of polyvinyl alcohol/chitosan composite nanofiber for transdermal drug delivery

et al. 2017

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“…Zeolites are well known as porous materials, and several have proton conducting properties [8,9]. PVA is well known as a water-soluble polymer, and many studies on zeolite-PVA composite films have been reported for various applications [10][11][12][13][14][15], and most of these studies utilized an aldehyde cross-linking reaction in acidic condition (Figure 2) [15,16]. Cross-linking of PVA can be carried out in thin film form, which is very important in this study, since the PVA can easily be cross-linked by penetration of the cross-linker aqueous solution after composite film preparation.…”

Section: Introductionmentioning

confidence: 99%

Proton-conductive nano zeolite-PVA composite film as a new water-absorbing electrolyte for water electrolysis

Nishihara¹,

Terayama

Haji

et al. 2018

Express Polym. Lett.

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Abstract. In this study, organic-inorganic composite electrolyte membranes are developed for a novel water-absorbing porous electrolyte water electrolysis cell. As the materials of the composite electrolyte membrane, 80 wt% of a proton-conducting nano zeolite (H-MFI) as an electrolyte and 20 wt% of poly(vinyl alcohol) (PVA) as a cross-linkable matrix are used. The nano zeolite is prepared by a milling process. The nano zeolite-PVA composite membrane precursors are prepared by spraying onto a substrate, followed by cross-linking. The resulting nano zeolite-cross-linked PVA composite films are then evaluated for their properties such as proton conductivity as electrolyte membranes for the water-absorbing porous electrolyte water electrolysis cell. It is confirmed that conventional materials such as zeolites and PVA can be used for the water electrolysis as an electrolyte.

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Highly Salt‐Resistant 3D Hydrogel Evaporator for Continuous Solar Desalination via Localized Crystallization

Jiang

et al. 2021

Adv Funct Materials

175

101

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The emerging solar desalination by interfacial evaporation shows great potential for alleviating the global freshwater crisis. However, salt deposition on the whole evaporation surface during steam generation leads to a deterioration in the evaporation rate and long‐term stability. Herein, it is demonstrated that a hydrogel‐based 3D structure can serve as an efficient and stable solar evaporator by salt localized crystallization for high‐salinity brine desalination. Under the function of micron‐grade brine transport management and edge‐preferential crystallization promoted by this novel design, this 3D hydrogel evaporator exhibits a superior salt‐resistant property without salt deposition on the photothermal surface even in 20 wt% brine for continuous 24‐h illumination. Moreover, by virtue of the synergistic effect of the promising 3D structure and excellent water transport of hydrogel, the proposed evaporator possesses an excellent evaporation performance achieving 2.07 kg m−2 h−1 on average in a high‐salinity brine (from 10 to 25 wt% NaCl) under 1 sun irradiation, among the best values reported in the literature. With stable and efficient evaporation performance out of high‐salinity brine, this design holds great potential for its applications in sustainable solar desalination.

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Acid catalysed cross-linking of poly vinyl alcohol (PVA) by glutaraldehyde: effect of crosslink density on the characteristics of PVA membranes used in single chambered microbial fuel cells

Abstract: In the present study, acid catalysed cross-linking of poly vinyl alcohol (PVA) with varying concentrations of glutaraldehyde was analyzed and the cross-linked PVAs were utilized as membrane separators in single chambered microbial fuel cells (MFCs).

Cited by 182 publications

References 43 publications

Electrospinning and crosslinking of polyvinyl alcohol/chitosan composite nanofiber for transdermal drug delivery

Electrospinning and crosslinking of polyvinyl alcohol/chitosan composite nanofiber for transdermal drug delivery

Proton-conductive nano zeolite-PVA composite film as a new water-absorbing electrolyte for water electrolysis

Highly Salt‐Resistant 3D Hydrogel Evaporator for Continuous Solar Desalination via Localized Crystallization

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