scholarly journals Impacts of Green Synthesis Process on Asymmetric Hybrid PDMS Membrane for Efficient CO2/N2 Separation

Membranes ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 59
Author(s):  
Guo-Liang Zhuang ◽  
Chao-Fong Wu ◽  
Ming-Yen Wey ◽  
Hui-Hsin Tseng
Keyword(s):  
Reaction Times ◽  
Curing Temperature ◽  
Synthesis Process ◽  
Co2 Separation ◽  
Separation Performance ◽  
Ceramic Substrates ◽  
Selective Layer ◽  
Asymmetric Hybrid ◽  
Teos Concentration ◽  
Gas Separation Performance

The effects of green processes in hybrid polydimethylsiloxane (PDMS) membranes on CO2 separation have received little attention to date. The effective CO2 separation of the membranes is believed to be controlled by the reaction and curing process. In this study, hybrid PDMS membranes were fabricated on ceramic substrates using the water-in-emulsion method and evaluated for their gas transport properties. The effects of the tetraethylorthosilicate (TEOS) concentration and curing temperature on the morphology and CO2 separation performance were investigated. The viscosity measurement showed that, at specific reaction times, it is benefit beneficial to fabricate the symmetric hybrid PDMS membranes with a uniform and dense selective layer on the substrate. Moreover, the a high TEOS concentration can decrease the reaction time and obtain create the a fully crosslinked structure, allowing more efficient CO2/N2 separation. The separation performance was furtherly improved with in the membrane prepared at a high curing temperature of 120 °C. The developed membrane shows excellent CO2/N2 separation with a CO2 permeance of 27.7 ± 1.3 GPU and a CO2/N2 selectivity of 10.3 ± 0.3. Moreover, the membrane shows a stable gas separation performance of up to 5 bar of pressure.

In situ synthesis of polymer grafted ZIFs and application in mixed matrix membrane for CO2 separation

2018 ◽  
Vol 6 (7) ◽  
pp. 3151-3161 ◽  
Author(s):  
Yongqiang Gao ◽  
Zhihua Qiao ◽  
Song Zhao ◽  
Zhi Wang ◽  
Jixiao Wang
Keyword(s):  
Polymer Matrix ◽  
In Situ Synthesis ◽  
Mixed Matrix Membrane ◽  
Co2 Separation ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Interfacial Compatibility ◽  
Gas Separation Performance ◽  
Functionalized Surface

PEI-g-ZIF-8 presents appropriate porous structure, amino functionalized surface and improved interfacial compatibility with the polymer matrix to endow the MMMs with excellent gas separation performance.

Nanoscale MOF/organosilica membranes on tubular ceramic substrates for highly selective gas separation

2017 ◽  
Vol 10 (8) ◽  
pp. 1812-1819 ◽  
Author(s):  
Chunlong Kong ◽  
Hongbing Du ◽  
Liang Chen ◽  
Banglin Chen
Keyword(s):  
Gas Separation ◽  
Composite Membranes ◽  
Separation Performance ◽  
Nano Composite ◽  
Ceramic Substrates ◽  
Efficient Strategy ◽  
Gas Separation Performance

An efficient strategy has been developed for fabricating novel tubular MOF/organosilica nano-composite membranes with high gas separation performance.

scholarly journals Pebax-based composite membranes with high gas transport properties enhanced by ionic liquids for CO2 separation

RSC Advances ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 6422-6431 ◽  
Author(s):  
Mengdie Li ◽  
Xiangping Zhang ◽  
Shaojuan Zeng ◽  
Lu bai ◽  
Hongshuai Gao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Transport Properties ◽  
Gas Separation ◽  
Gas Transport ◽  
Composite Membranes ◽  
Co2 Separation ◽  
Separation Performance ◽  
Gas Transport Properties ◽  
Gas Separation Performance

A series of composite membranes with high gas transport properties enhanced by IL and ZIF-8 have been developed. The influence of ionic liquid and ZIF-8 addition on gas separation performance were systematically investigated.

Polymers of intrinsic microporosity/metal–organic framework hybrid membranes with improved interfacial interaction for high-performance CO2 separation

2017 ◽  
Vol 5 (22) ◽  
pp. 10968-10977 ◽  
Author(s):  
Zhenggong Wang ◽  
Huiting Ren ◽  
Shenxiang Zhang ◽  
Feng Zhang ◽  
Jian Jin
Keyword(s):  
High Performance ◽  
Metal Organic Framework ◽  
Interfacial Interaction ◽  
Co2 Separation ◽  
Separation Performance ◽  
Hybrid Membranes ◽  
Metal Organic ◽  
Polymers Of Intrinsic Microporosity ◽  
Intrinsic Microporosity ◽  
Gas Separation Performance

An interfacial design utilizing hydrogen bonds was proposed for fabricating non-defective PIMs/MOF hybrid membranes to enhance the gas separation performance.

Enhanced CO2 separation performance of P(PEGMA-co-DEAEMA-co-MMA) copolymer membrane through the synergistic effect of EO groups and amino groups

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 59946-59955 ◽  
Author(s):  
Liangliang Dong ◽  
Yue Wang ◽  
Mingqing Chen ◽  
Dongjian Shi ◽  
Xiaojie Li ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Gas Separation ◽  
Co2 Separation ◽  
Separation Performance ◽  
Amino Groups ◽  
Gas Separation Performance

PEDM copolymer membrane showed excellent gas separation performance through synergistic effect of EO and amino.

scholarly journals 3D Metal–Organic Frameworks Based on Co(II) and Bithiophendicarboxylate: Synthesis, Crystal Structures, Gas Adsorption, and Magnetic Properties

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1269
Author(s):  
Vadim A. Dubskikh ◽  
Anna A. Lysova ◽  
Denis G. Samsonenko ◽  
Alexander N. Lavrov ◽  
Konstantin A. Kovalenko ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Adsorption ◽  
Magnetic Moments ◽  
Bet Surface Area ◽  
Separation Performance ◽  
Bridging Ligands ◽  
Magnetization Data ◽  
Metal Organic ◽  
Ch4 Adsorption ◽  
Gas Separation Performance

Three new 3D metal-organic porous frameworks based on Co(II) and 2,2′-bithiophen-5,5′-dicarboxylate (btdc2−) [Co3(btdc)3(bpy)2]·4DMF, 1; [Co3(btdc)3(pz)(dmf)2]·4DMF·1.5H2O, 2; [Co3(btdc)3(dmf)4]∙2DMF∙2H2O, 3 (bpy = 2,2′-bipyridyl, pz = pyrazine, dmf = N,N-dimethylformamide) were synthesized and structurally characterized. All compounds share the same trinuclear carboxylate building units {Co3(RCOO)6}, connected either by btdc2– ligands (1, 3) or by both btdc2– and pz bridging ligands (2). The permanent porosity of 1 was confirmed by N2, O2, CO, CO2, CH4 adsorption measurements at various temperatures (77 K, 273 K, 298 K), resulted in BET surface area 667 m2⋅g−1 and promising gas separation performance with selectivity factors up to 35.7 for CO2/N2, 45.4 for CO2/O2, 20.8 for CO2/CO, and 4.8 for CO2/CH4. The molar magnetic susceptibilities χp(T) were measured for 1 and 2 in the temperature range 1.77–330 K at magnetic fields up to 10 kOe. The room-temperature values of the effective magnetic moments for compounds 1 and 2 are μeff (300 K) ≈ 4.93 μB. The obtained results confirm the mainly paramagnetic nature of both compounds with some antiferromagnetic interactions at low-temperatures T < 20 K in 2 between the Co(II) cations separated by short pz linkers. Similar conclusions were also derived from the field-depending magnetization data of 1 and 2.

scholarly journals The spirobichroman-based polyimides with different side groups: from structure–property relationships to chain packing and gas transport performance

RSC Advances ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 5086-5095
Author(s):  
Shuli Wang ◽  
Xiaohua Tong ◽  
Chunbo Wang ◽  
Xiaocui Han ◽  
Sizhuo Jin ◽  
...  
Keyword(s):  
Dihedral Angle ◽  
Gas Separation ◽  
Gas Transport ◽  
Critical Role ◽  
Polymer Membranes ◽  
Separation Performance ◽  
Structure Property ◽  
Chain Packing ◽  
Structure Property Relationships ◽  
Gas Separation Performance

Effect of substituents on the dihedral angle and chain packing plays a critical role in the enhancement in the gas separation performance of polymer membranes.

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