Characterization of 6FDA-based hyperbranched and linear polyimide-silica hybrid membranes by gas permeation and129Xe NMR measurements

2005 ◽  
Vol 44 (2) ◽  
pp. 291-298 ◽  
Author(s):  
Tomoyuki Suzuki ◽  
Yasuharu Yamada
Keyword(s):  
Gas Permeation ◽  
Hybrid Membranes ◽  
Silica Hybrid

Preparation and characterization of transparent polyarylethers-silica hybrid membranes with covalently connected phases

Polymer ◽  
2012 ◽  
Vol 53 (22) ◽  
pp. 5002-5009 ◽  
Author(s):  
Wei Wei ◽  
Haibo Zhang ◽  
Shaowei Guan ◽  
Zhenhua Jiang ◽  
Xigui Yue
Keyword(s):  
Hybrid Membranes ◽  
Silica Hybrid

Synthesis and Characterization of Uniform Alumina−Mesoporous Silica Hybrid Membranes

Langmuir ◽  
2006 ◽  
Vol 22 (4) ◽  
pp. 1839-1845 ◽  
Author(s):  
Sukjoon Yoo ◽  
David M. Ford ◽  
Daniel F. Shantz
Keyword(s):  
Mesoporous Silica ◽  
Synthesis And Characterization ◽  
Hybrid Membranes ◽  
Silica Hybrid

scholarly journals The Effect of Silica Loading on the Performance and Morphology of Polyimide–Silica Hybrid Membrane

2017 ◽  
Vol 14 (1) ◽  
Author(s):  
N. S. A. Bakar ◽  
S. A. Hashemifard ◽  
A. Mustafa
Keyword(s):  
Gas Separation ◽  
Sol Gel ◽  
Gas Permeation ◽  
Hybrid Membrane ◽  
Morphological Properties ◽  
Hybrid Membranes ◽  
Separation Processes ◽  
Polyimide Membrane ◽  
Silica Sols ◽  
Silica Hybrid

The performance of silica-polyimide hybrid membranes has been investigated for gas separation processes. The dope solution consisted of polyimide resin dissolved in NMP and silica sols at various weight percentages. The silica sols were prepared using a sol–gel process and the flat–sheet silica–polyimide hybrid membranes were cast using an immersion precipitation technique. The effects of silica sols loading on the gas transport properties of polyimide hybrid membranes and the correlation of morphology changes in the membrane structure and molecular orientation were studied. Polyimide hybrid membranes with silica sols loading ranging from 0 to 50 wt% were tested on gas permeation performance with single gas of O2, N2, CH4 and CO2. The gas permeation results showed that the hybrid membranes with 20 wt% to 25 wt% silica loading exhibited higher selectivity than the pure polyimide membrane. Morphological properties and molecular orientations of the silica–polyimide hybrid membranes were also studied using SEM and FTIR, respectively. The SEM and FTIR results confirmed that the 20 and 25 wt% of silica loading was the ideal composition of polyimide–silica hybrid membrane for gas separation.

Characterization of Nafion/Silica Hybrid Composite Membranes for Redox Flow Battery (RFB) Applications

2014 ◽  
Vol 911 ◽  
pp. 45-49
Author(s):  
Haryadi ◽  
Y.B. Gunawan ◽  
S.P. Mursid ◽  
D. Haryogi
Keyword(s):  
Composite Membranes ◽  
Exchange Capacity ◽  
Hybrid Membranes ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Ion Exchange Capacity ◽  
Ft Ir ◽  
Silica Hybrid

Nafion/Silica hybrid membranes were preparedvia in situsolgel method for redox flow battery (RFB) system. In this work, a novel Nafion/organically modified silicate hybrids nanocomposite membrane was preparedvia in situsolgel reactions for mixtures of tetraethoxysilane (TEOS) and trimethoxyprohanthiol (TMSP). The primary properties of Nafion/Silica hybrids membrane were measured and compared with Nafion and Nafion/SiO2hybrid membranes. Fourier transform infrared spectra (FT-IR) analysis of the hybrids membranes reveal that the silica and organic modified silica phase is well formed within hybrids membrane. The XRD results indicate thatthe Nafionhybrid membranes are not influenced by SiO2nanoparticles.Nafion/Silica hybrid membrane shows nearly the same ion exchange capacity (IEC) and slightly greater of proton conductivity as pristine Nafion-117 membrane. The water uptake for Nafion/Organosilica hybrids membrane shows greatly reduced than a pristine Nafion 117, suggesting of low water cross over that is mostly faced in the RFB applications.

Preparation and characterization of PVDF/silica hybrid membranes containing sulfonic acid groups

2004 ◽  
Vol 93 (1) ◽  
pp. 209-218 ◽  
Author(s):  
Dae Sik Kim ◽  
Ho Bum Park ◽  
Young Moo Lee ◽  
Young Hoon Park ◽  
Ji-Won Rhim
Keyword(s):  
Sulfonic Acid ◽  
Hybrid Membranes ◽  
Sulfonic Acid Groups ◽  
Silica Hybrid

scholarly journals Multiple Amine-Contained POSS-Functionalized Organosilica Membranes for Gas Separation

Membranes ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 194
Author(s):  
Xiuxiu Ren ◽  
Masakoto Kanezashi ◽  
Meng Guo ◽  
Rong Xu ◽  
Jing Zhong ◽  
...  
Keyword(s):  
Gas Separation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Separation Performance ◽  
Hybrid Membranes ◽  
Mixed Matrix ◽  
Translation Model ◽  
Good Thermal Stability ◽  
Oligomeric Silsesquioxane

A new polyhedral oligomeric silsesquioxane (POSS) designed with eight –(CH2)3–NH–(CH2)2–NH2 groups (PNEN) at its apexes was used as nanocomposite uploading into 1,2-bis(triethoxysilyl)ethane (BTESE)-derived organosilica to prepare mixed matrix membranes (MMMs) for gas separation. The mixtures of BTESE-PNEN were uniform with particle size of around 31 nm, which is larger than that of pure BTESE sols. The characterization of thermogravimetric (TG) and gas permeance indicates good thermal stability. A similar amine-contained material of 3-aminopropyltriethoxysilane (APTES) was doped into BTESE to prepare hybrid membranes through a copolymerized strategy as comparison. The pore size of the BTESE-PNEN membrane evaluated through a modified gas-translation model was larger than that of the BTESE-APTES hybrid membrane at the same concentration of additions, which resulted in different separation performance. The low values of Ep(CO2)-Ep(N2) and Ep(N2) for the BTESE-PNEN membrane at a low concentration of PNEN were close to those of copolymerized BTESE-APTES-related hybrid membranes, which illustrates a potential CO2 separation performance by using a mixed matrix membrane strategy with multiple amine POSS as particles.

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