Influence of Casting Method on Pervaporational Performanses of Polyheptylmethylsiloxane Membranes

A method of composite membrane obtaining effects on its transport properties. In the present work, for the first time, the influence of the method of applying a selective layer of polyheptylmethylsiloxane on the composite membrane pervaporation properties in the process of alcohol separation from water was studied. The comparison of two casting methods (kiss-coating and spin-coating) was conducted. Morphology of the obtained membranes and their separation properties during the pervaporation of the mixture of C2-C4 alcohols and water. It was shown that kiss-coating allows completely prevent leakage of the selective layer into the substrate pores. And, such a way, it allows to improve permeability of composite membrane (BuOH - 3.5 mol/(kPa·h·m2)). Besides, spin-coating method leads to higher selectivity (BuOH/H2O - 2.3). It is caused by blocking the swelling of that part of the selective layer that is locked in the pores of the substrate. Thus, the choice of the casting method can determine the compatibility of the composite membrane with a specific separation task.

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Influence of Spin Coating Parameters on Gas Transport Properties of Thin-Film Composite Membranes

Materials ◽

10.3390/ma14175093 ◽

2021 ◽

Vol 14 (17) ◽

pp. 5093

Author(s):

Stepan Sokolov ◽

Alexey Balynin ◽

Danila Bakhtin ◽

Ilya Borisov

Keyword(s):

Transport Properties ◽

Penetration Depth ◽

Spin Coating ◽

Rotation Speed ◽

Composite Membranes ◽

Selective Layer ◽

Thin Film Composite ◽

Film Forming ◽

Coating Method ◽

First Time

The influence of casting centrifugation process parameters, such as a rotation speed (ω), the amount of the film-forming solution (V), and its concentration (C) on transport properties of composite membranes were investigated. A number of composite membranes based on poly (1-trimethylsilylpropyne) (PTMSP) and micro- (MFFK-1) and ultrafiltration (UFFK) membranes were obtained using the spin-coating method. For the first time, an unexpected dependence of permeance and ideal selectivity on rotation speed had been discovered: the thickness of the selective layer decreases from 3.0 to 1.0 μm for MFFK-1 and from 1.7 to 1.1 μm for UFFK with an increase of spin coater rotation speed from 500 to 3000 rpm. However, the gas permeance of composite membranes in the range of 500–2000 rpm was reduced due to an increase of a penetration depth of PTMSP into a support layer porous structure (estimated by the EDX method). The permeance of the PTMSP/UFFK membranes was higher than PTMSP/MFFK-1 membranes due to a thinner selective layer and a lower penetration depth of polymer solution into the pores of the support. The highest CO2/N2 selectivity values were achieved as 5.65 ± 0.9 at CO2 permeance 5600 ± 1000 GPU for PTMSP/UFFK membranes (CPTMSP = 0.35%, Vsolution = 1 mL, ω = 1000 rpm), and 6.1 ± 0.5 at CO2 permeance 4090 ± 500 GPU for PTMSP/MFFK-1 membranes (CPTMSP = 0.35%, Vsolution = 1 mL, ω = 2000 rpm).

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Development of Molybdenum trioxide (MoO3) by spin coating method for photovoltaic application

Renewable Energy and Power Quality Journal ◽

10.24084/repqj10.840 ◽

2012 ◽

pp. 1805-1808 ◽

Cited By ~ 2

Author(s):

L. Chibane ◽

M.S. Belkaid ◽

M. Pasquinelli ◽

H. Derbal-Habak ◽

J.J. Simon ◽

...

Keyword(s):

Spin Coating ◽

Molybdenum Trioxide ◽

Spin Coating Method ◽

Photovoltaic Application ◽

Coating Method

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Valence state and magnetism of Mn-doped PbPdO 2 nanograin film synthesized by sol-gel spin-coating method

Thin Solid Films ◽

10.1016/j.tsf.2016.12.043 ◽

2017 ◽

Vol 623 ◽

pp. 14-18 ◽

Cited By ~ 6

Author(s):

Fenglin Tang ◽

Chao Mei ◽

Peiyu Chuang ◽

Tingting Song ◽

Hailin Su ◽

...

Keyword(s):

Spin Coating ◽

Valence State ◽

Sol Gel ◽

Spin Coating Method ◽

Coating Method ◽

Mn Doped

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Nanostructured CdS Buffer Layer Fabricated with a Simple Spin Coating Method for Sb 2 S 3 Solar Cells

physica status solidi (a) ◽

10.1002/pssa.202100337 ◽

2021 ◽

Author(s):

Xingyun Liu ◽

Zitong Feng ◽

Yuxia Sun ◽

Mingzhu Su ◽

Ying Liu ◽

...

Keyword(s):

Solar Cells ◽

Buffer Layer ◽

Spin Coating ◽

Spin Coating Method ◽

Coating Method

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Stress-induced phase-alteration in solution processed indium selenide thin films during annealing

RSC Advances ◽

10.1039/d1ra01403j ◽

2021 ◽

Vol 11 (23) ◽

pp. 13751-13762

Author(s):

Bipanko Kumar Mondal ◽

Shaikh Khaled Mostaque ◽

Md. Ariful Islam ◽

Jaker Hossain

Keyword(s):

Thin Films ◽

Spin Coating ◽

Indium Selenide ◽

Solution Processed ◽

Spin Coating Method ◽

Coating Method

This article demonstrates the successful synthesis of indium selenide thin films by a spin coating method in air using thiol-amine cosolvents.

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Nanocellulose as Modifier for Hollow Fiber Ultrafiltration PSF Membranes

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.816.238 ◽

2019 ◽

Vol 816 ◽

pp. 238-243 ◽

Cited By ~ 1

Author(s):

Tatyana S. Anokhina ◽

S.D. Bazhenov ◽

Ilya L. Borisov ◽

V.P. Vasilevsky ◽

V.A. Vinokurov ◽

...

Keyword(s):

Transport Properties ◽

Hollow Fiber ◽

Cellulose Nanofibrils ◽

Membrane Modification ◽

Selective Layer ◽

Blue Dextran ◽

First Time ◽

Molding Solution

In the present work, a study was conducted for the first time on the modification of hollow fiber UF PSF membranes by cellulose nanofibrils. Two approaches to membrane modification were analyzed: 1) introduction of CNF into the molding solution; 2) additions of CNF to the internal coagulant. Analysis of the transport properties of the investigated membranes showed that the first approach allows increasing the porosity of hollow fiber PSF membranes, due to which the permeability increases from 82 to 287 l / m2 h bar compared to the original membranes. Rejection of dye Blue Dextran (MM = 69 kg / mole) is reduced by 20%. The addition of CNF to the outside coagulant led to the formation of not only the inside selective layer, but also the outer one, while the permeability increases 1.5 times, and the rejection of the dye also increases from 96 to 99%.

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