scholarly journals Fabrication of Polydimethysiloxane (PDMS) Dense Layer on Polyetherimide (PEI) Hollow Fiber Support for the Efficient CO2/N2 Separation Membranes

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 756
Author(s):  
Guoqiang Li ◽  
Katarzyna Knozowska ◽  
Joanna Kujawa ◽  
Andrius Tonkonogovas ◽  
Arūnas Stankevičius ◽  
...  
Keyword(s):  
Gas Separation ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Dip Coating ◽  
Separation Performance ◽  
Dense Layer ◽  
Pdms Layer ◽  
Coating Method ◽  
Coating Time ◽  
Dip Coating Method

The development of thin layer on hollow-fiber substrate has drawn great attention in the gas-separation process. In this work, polydimethysiloxane (PDMS)/polyetherimide (PEI) hollow-fiber membranes were prepared by using the dip-coating method. The prepared membranes were characterized by Scanning Electron Microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), and gas permeance measurements. The concentration of PDMS solution and coating time revealed an important influence on the gas permeance and the thickness of the PDMS layer. It was confirmed from the SEM and EDX results that the PDMS layer’s thickness and the atomic content of silicon in the selective layer increased with the growth in coating time and the concentration of PDMS solution. The composite hollow-fiber membrane prepared from 15 wt% PDMS solution at 10 min coating time showed the best gas-separation performance with CO2 permeance of 51 GPU and CO2/N2 ideal selectivity of 21.

Preparation of antifouling polypropylene/ZnO composite hollow fiber membrane by dip-coating method for peat water treatment

2020 ◽  
Vol 34 ◽  
pp. 101158 ◽  
Author(s):  
I.G. Wenten ◽  
K. Khoiruddin ◽  
A.K. Wardani ◽  
P.T.P. Aryanti ◽  
D.I. Astuti ◽  
...  
Keyword(s):  
Water Treatment ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Dip Coating ◽  
Fiber Membrane ◽  
Coating Method ◽  
Dip Coating Method

scholarly journals Preparation of high permeable alumina ceramic membrane with good separation performance via UV curing technique

RSC Advances ◽  
2018 ◽  
Vol 8 (24) ◽  
pp. 13567-13577 ◽  
Author(s):  
Yang Liu ◽  
Weiya Zhu ◽  
Kang Guan ◽  
Cheng Peng ◽  
Jianqing Wu
Keyword(s):  
Ceramic Membrane ◽  
Uv Curing ◽  
Ceramic Membranes ◽  
Dip Coating ◽  
Alumina Ceramic ◽  
Separation Performance ◽  
Good Separation ◽  
Drying Time ◽  
Coating Method ◽  
Dip Coating Method

The traditional dip-coating method for preparation of ceramic membranes requires a long drying time and easily produces drying defects. In this work, an improved dip-coating process was proposed.

Effect of MIL-53 on phase inversion and gas separation performance of mixed matrix hollow fiber membranes

RSC Advances ◽  
2016 ◽  
Vol 6 (73) ◽  
pp. 69124-69134 ◽  
Author(s):  
Haitao Zhu ◽  
Xingming Jie ◽  
Lina Wang ◽  
Guodong Kang ◽  
Dandan Liu ◽  
...  
Keyword(s):  
Solvent Effect ◽  
Gas Separation ◽  
Hollow Fiber ◽  
Membrane Structure ◽  
Phase Inversion ◽  
Hollow Fiber Membrane ◽  
Separation Performance ◽  
Fiber Membrane ◽  
Mixed Matrix ◽  
Gas Separation Performance

The MIL-53 non-solvent effect influenced the phase inversion of spinning dope, and the MOF-containing hollow fiber membrane structure was optimized.

scholarly journals Fabrication of Functionalized MOFs Incorporated Mixed Matrix Hollow Fiber Membrane for Gas Separation

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Haitao Zhu ◽  
Xingming Jie ◽  
Yiming Cao
Keyword(s):  
Gas Separation ◽  
Polymer Matrix ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Metal Organic Framework ◽  
Separation Performance ◽  
Fluid Composition ◽  
Solvent Ratio ◽  
Fiber Membrane ◽  
Mixed Matrix

The metal-organic framework (MOFs) of MIL-53 was functionalized by aminosilane grafting and then incorporated into Ultem®1000 polymer matrix to fabricate mixed matrix hollow fiber membrane (MMHFM) with high separation performance. SEM, XRD, and TGA were performed to characterize the functionalized MIL-53 and prepared MMHFM. The filler particles were embedded in membrane successfully and dispersed well in the polymer matrix. The incorporation of MOFs endowed MMHFM better thermal stability. Moreover, effects of solvent ratio in spinning dope, spinning condition, and testing temperature on gas separation performance of MMHFM were investigated. By optimizing dope composition, air gap distance, and bore fluid composition, MMHFM containing functionalized MIL-53 achieved excellent gas permeance and CO2/N2selectivity. The CO2permeance increased from 12.2 GPU for pure Ultem HFM to 30.9 GPU and the ideal CO2/N2selectivity was enhanced from 25.4 to 34.7 simultaneously. Additionally, gas permeance increased but the selectivity decreased with the temperature increase, which followed the solution-diffusion based transport mechanism.

Mathematical Modeling of the Radial Crossflow Hollow Fiber Membrane Module for Multi-Component Gas Separation

2014 ◽  
Vol 625 ◽  
pp. 726-729 ◽  
Author(s):  
Serene Sow Mun Lock ◽  
Kok Keong Lau ◽  
Mohd Shariff Azmi
Keyword(s):  
Mathematical Model ◽  
Gas Separation ◽  
Hollow Fiber ◽  
Membrane Separation ◽  
Hollow Fiber Membrane ◽  
Membrane Module ◽  
Separation Performance ◽  
Fiber Membrane ◽  
Cell Balance ◽  
The Ideal

A “Multi-component Progressive Cell Balance” approach has been applied to characterize the gas separation of the radial crossflow hollow fiber membrane module. The mathematical model is an indispensable tool to evaluate the separation performance of membrane material towards different components. The approach is required to be implemented since there is scarcely available mathematical model to characterize the two dimensional radial crossflow. In addition, the currently available mathematical model is confined to the ideal binary system, which constraints its applicability in real membrane separation process with many components. The significance of the developed multi-component mathematical model as compared to the model adapting the ideal binary simulation condition is demonstrated in this study.

Porous Gel Coatings Obtained by Phase Separation in ORMOSIL System

2000 ◽  
Vol 628 ◽  
Author(s):  
Kazuki Nakanishi ◽  
Souichi Kumon ◽  
Kazuyuki Hirao ◽  
Hiroshi Jinnai
Keyword(s):  
Phase Separation ◽  
Reaction Time ◽  
Volume Fraction ◽  
Sol Gel ◽  
Reaction Times ◽  
Dip Coating ◽  
Coating Solution ◽  
Coating Method ◽  
Gel Phase ◽  
Dip Coating Method

ABSTRACTMacroporous silicate thick films were prepared by a sol-gel dip-coating method accompanied by the phase separation using methyl-trimethoxysilane (MTMS), nitric acid and dimethylformamide (DMF) as starting components. The morphology of the film varied to a large extent depending on the time elapsed after the hydrolysis until the dipping of the coating solution. On a glass substrate, the films prepared by early dipping had inhomogeneous submicrometer-sized pores on the surface of the film. At increased reaction times, relatively narrow sized isolated macropores were observed and their size gradually decreased with the increase of reaction time. On a polyester substrate, in contrast, micrometer-sized isolated spherical gel domains were homogeneously deposited by earlier dippings. With an increase of reaction time, the volume fraction of the gel phase increased, then the morphology of the coating transformed into co-continuous gel domains and macropores, and finally inverted into the continuous gel domains with isolated macropores. The overall morphological variation with the reaction time was explained in terms of the phase separation and the structure freezing by the forced gelation, both of which were induced by the evaporation of methanol during the dipping operation.

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