Dehydration of 1,4-dioxane by pervaporation using modified blend membranes of chitosan and nylon 66

Smitha, B.; Dhanuja, G.; Sridhar, S.

doi:10.1016/j.carbpol.2006.04.006

Cited by 50 publications

(21 citation statements)

References 18 publications

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“…8,9 In particular, modification of chitosan by means of blending with other polymers is a convenient and effective method for practical utilization. [10][11][12][13] However, little attention focuses on the effects of blending on the antibacterial properties of chitosan. 14 The antibacterial activity of chitosan, arising from its polycationic nature, is well known for a variety of bacteria and fungi.…”

Section: Introductionmentioning

confidence: 99%

Preparation of chitosan–nylon-6 blended membranes containing silver ions as antibacterial materials

Zhou

Zhao

2008

Carbohydrate Research

111

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Section: Introductionmentioning

confidence: 99%

Preparation of chitosan–nylon-6 blended membranes containing silver ions as antibacterial materials

Zhou

Zhao

2008

Carbohydrate Research

111

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“…**Corresponding author. several hybrid composite membranes loaded with inorganic zeolite particles have been developed and used for dehydrating organics [5][6][7][8][9][10][11][12][13][14]. Separation using zeolitefilled PV membranes occurs by adsorption-desorption and molecular sieving effects due to the presence of small particles [15].…”

Section: Introductionmentioning

confidence: 99%

Hybrid composite membranes of sodium alginate for pervaporation dehydration of 1,4-dioxane and tetrahydrofuran

Patil

Veerapur

Bhat

et al. 2009

Desalination and Water Treatment

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A B S T R A C TThe study reports on the development of hybrid composite membranes of sodium alginate loaded with hydrophilic alumina-containing Mobile Composition Matter-41 i.e., Al-MCM-41 in different compositions from 3 to 10 wt.% that are used for pervaporation (PV) dehydration of 1,4-dioxane and tetrahydrofuran (THF) from aqueous mixtures in compositions of 10-40 wt.% at 30EC. The PV performance of the hybrid composite membranes was much superior to that of plain NaAlg membrane in terms of selectivity and flux due to increased hydrophilicity of NaAlg membrane in the presence of Al-MCM-41 mesoporous zeolite particles that are also hydrophilic. Membranes crosslinked with glutaraldehyde were characterised by ion exchange capacity, Fourier Transform spectroscopy and X-ray diffraction. Morphology of the membranes was assessed by scanning electron microscopy. Sorption studies have been performed to evaluate the extent of interaction and degree of swelling of the membranes with pure and mixed feed aqueous mixtures of 1,4-dioxane and THF. It is observed that flux and selectivity increased systematically with increasing amount of Al-MCM-41 particles in the NaAlg matrix. In case of hybrid composite membrane containing 10 wt.% Al-MCM-41, selectivity for water was infinity, which was attributed to the combined effects of molecular adhesion between particle surfaces and NaAlg matrix as well as higher selectivity of the composite membrane when compared to plain NaAlg membrane.

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“…These blends presented good mechanical properties with improved stability in aqueous solutions; blends have also showed good selectivity to dioxane/water mixture. 20 In the present work, nylon 6,6 was used to reduce the excessive swelling of the prepared polymer electrolyte membranes, consequently improving their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…Polar amide groups are able to form hydrogen bonds with other polymers and the polymer backbone itself, thus increasing polymer crystallinity. These characteristics can improve composite properties when blending nylon with other polymers, as described by Lu et al 19 Chitosan/nylon 6,6 blends crosslinked with sulphuric acid were studied by Smitha et al 20 , who have evaluated physical-mechanical properties and their efficiency in a dioxane-water mixture dehydration. These blends presented good mechanical properties with improved stability in aqueous solutions; blends have also showed good selectivity to dioxane/water mixture.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of an Eco-Friendly Polymer Electrolyte Membrane (PEM) Based in a Blend of Sulphonated Poly(Vinyl Alcohol)/ Chitosan Mechanically Stabilised by Nylon 6,6

Oliveira

Mendes

2016

Mat. Res.

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Membranes for fuel cell applications were prepared using two polymer blends: poly(vinyl alcohol) (PVAL) and chitosan (CS), 80/20 (w/w) and 60/40 (w/w) with and without nylon. Sulfosuccinic acid (SSA) was used both as a crosslinking and a sulfonating agent. An increasing in the SSA content raised ionic exchange capacity and consequently proton conductivity in the membranes. The addition of nylon has improved membrane mechanical properties by decreasing stiffness. Membranes presented good proton conductivity (around 10 -2 S cm -1 ) and lower H 2 and methanol permeability rather than the standard membrane Nafion ® 115. Membranes which showed to be stable under fuel cell operation were tested using hydrogen and methanol fuels. Membrane PVAL:CS, 80/20 (w/w), containing SSA crosslinker, (PVAL+CS)/SSA, of 4/1 (mol/mol), has shown the best performance under fuel cell environment. However, results have shown that an improvement is required in the adhesion between the membrane and the electrodes.

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Dehydration of 1,4-dioxane by pervaporation using modified blend membranes of chitosan and nylon 66

Cited by 50 publications

References 18 publications

Preparation of chitosan–nylon-6 blended membranes containing silver ions as antibacterial materials

Preparation of chitosan–nylon-6 blended membranes containing silver ions as antibacterial materials

Hybrid composite membranes of sodium alginate for pervaporation dehydration of 1,4-dioxane and tetrahydrofuran

Preparation and Characterization of an Eco-Friendly Polymer Electrolyte Membrane (PEM) Based in a Blend of Sulphonated Poly(Vinyl Alcohol)/ Chitosan Mechanically Stabilised by Nylon 6,6

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