PEO-rich semi-interpenetrating polymer network (s-IPN) membranes for CO2 separation

Kline, Gregory K.; Zhang, Qinnan; Weidman, Jennifer R.; Guo, Ruilan

doi:10.1016/j.memsci.2017.09.005

Cited by 34 publications

(30 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microporous polyimides (PIs) with outstanding physicochemical and thermal stability are good candidates for gas capture adsorbents. − The abundant N and O heteroatoms in main chains benefit the formation of strong interaction between polyimide skeletons and CO 2 gas molecules. , Different from some linear polyimides of intrinsic microporosity with rigid contortion structures, − most linear PIs not only lack contortion structures but also have flexible skeletons, which make the polymer segments pack densely and form a dense state. As a result, most linear PIs have no microporous structures.…”

Section: Introductionmentioning

confidence: 99%

Construction of Microporous Polyimides with Tunable Pore Size and High CO₂ Selectivity Based on Cross-Linkable Linear Polyimides

Wang

Yao

Song

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Polyimides with intrinsic microporosity have been well developed and explored in the field of gas adsorption and separation. However, most linear polyimides without rigid and distorted segments do not have porous structure owing to the densely packed polymer chains. Two cross-linked polyimides (PEDA-PI-CL and PEQDA-PI-CL) were synthesized from 3,3′bis(2,3,5,6-tetrafluoro-4-vinylphenoxy)-4,4′-biphenyldiamine (TFVBPA) with 2,5-bis(3,4-dicarboxyphenoxy)-4′-phenyl dianhydride (PEDA) and 2,5-bis(3,4-dicarboxyphenoxy)-4′-phenylethynyl phenyl dianhydride (PEQDA) through polycondensation and thermal cross-linking reactions. Here, the cross-linked structure is utilized to construct microporous polyimides because it can restrict the movement of polymer segments and prevent the polymer chains from dense packing. The micropore size, microporous structure, and CO 2 adsorption performance can be finely tuned by increasing the cross-linking density from PEDA-PI-CL to PEQDA-PI-CL. The micropore size reduces from 1.06 to 0.54 nm and CO 2 adsorption increases from 6.32 to 9.88 wt %. Meanwhile, the CO 2 /N 2 and CO 2 /CH 4 selectivity values of PEQDA-PI-CL at 273 K/1 bar are 76.62 and 12.40, respectively, which is better than many other common microporous polyimides. These results reveal that increasing cross-linking density in cross-linked polyimides is favorable for preparing microporous polyimide networks with smaller pores and higher CO 2 adsorption selectivity.

show abstract

Section: Introductionmentioning

confidence: 99%

Construction of Microporous Polyimides with Tunable Pore Size and High CO₂ Selectivity Based on Cross-Linkable Linear Polyimides

Wang

Yao

Song

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…It is shown that the 5 and 10% weight loss of all s‐IPNs films were in the range of 238–282 °C and 334–365 °C and higher than that of pure EP, which confirms their high thermal stability characteristic due to the high thermal stability of copolyimide and the formation of interpenetrated structure . Comparing with other kinds of IPNs such as PU/PS IPNs and PI‐PEOx/EP s‐IPNs, the prepared PI/EP s‐IPNs have shown more excellent thermal stability. As shown in Figure (a), the thermal stability of various s‐IPNs films is rather independent of the different molar ratios of TFMB/ODA (the different molecular structure of copolyimide) in our current study condition.…”

Section: Resultsmentioning

confidence: 74%

“…The general fabrication of s‐IPNs membranes involves the mixing of linear copolyimide with EP oligomers and forming EP crosslinked network for chain penetration . Various components of PI/EP s‐IPNs membranes were prepared as follows.…”

Section: Methodsmentioning

confidence: 99%

Damping, thermal, and mechanical performances of a novel semi‐interpenetrating polymer networks based on polyimide/epoxy

Yang

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this article, a series of novel semi-interpenetrating polymer networks (s-IPNs) based on linear polyimide (PI) and crosslinked epoxy (EP) were firstly prepared aiming at controlling violent vibration and noise originating from operation of the machine. The damping, thermal, and mechanical performances of s-IPNs films were systematically investigated in terms of the structure of polyimide (the molar ratios of diamines) and the component ratios of PI/EP. The results indicate that PI/EP s-IPNs films exhibit prominent damping properties, and the effective damping temperature range can reach up to 58.8 C when molar ratio of diamines is 1:3 within PI and component ratio of PI/EP is 70:30. Meanwhile, all the PI/EP s-IPNs films show good thermal stability compared to cured EP and certain mechanical behaviors due to the formation of semi-interpenetrated structure. Meaningfully, the prepared novel PI/EP s-IPNs will be used as effective damping materials and have a potential application in damping fields.

show abstract

“…Interpenetrating network (IPN)-derived materials, with the dispersion of two different materials in the molecule-level, are believed to combine the advantages of each network and overcome the shortcomings of MMMs. − Theoretically, the materials in IPNs should have strong interactions or compatibility via covalent bonds, hydrogen bonds, electrostatic forces, dipole–dipole forces, and Van der Waals’ forces. Some researchers have synthesized CO 2 separation membranes with organic–organic IPNs and/or semi-IPN structures. − As far as we could ascertain, however, organosilica/polymer-based IPN membranes for CO 2 separation have rarely been reported.…”

Section: Introductionmentioning

confidence: 97%

Pore Structure Controllability and CO₂ Permeation Properties of Silica-Derived Membranes with a Dual-Network Structure

Nakahiro

Nagasawa

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

We proposed a novel method for designing CO2 permselective organosilica/polymer membranes with a dual-network structure composed of silica (first) and alkylamine-based (second) networks to control molecular sieving and CO2 adsorption properties in the membrane. Organosilica/polymer membranes were fabricated using 1,2-bis(triethoxysilyl)ethane (BTESE) or 1,2-bis(triethoxyailyl)acetylene (BTESA) as the first network, with polyethylenimine (PEI) as the second network via the sol–gel process. CO2 adsorption measurements of BTESE/PEI films were conducted via in situ Fourier transform infrared to evaluate the effects that different types of acid catalysts exert on CO2 adsorption properties. The results showed that only BTESE/PEI films prepared with a catalyst of acetic acid (HAc) display impressive chemical reactions between CO2 and amine groups, whereas the use of HCl may deactivate the amine groups. We found that the gas permeation properties of organosilica/PEI membranes were greatly dependent on the Si-precursor. Almost no selectivity could be confirmed for BTESA/PEI membranes, although pure BTESA membranes did show molecular sieving properties. However, BTESE/PEI membranes showed improved separation performance compared with that of pure BTESE membranes due to a reduction in the free volume (BTESE: H2/CH4 selectivity < 100, BTESE/PEI: H2/CH4 > 100). Moreover, the pore size of BTESE/PEI membranes could be controlled via the BTESE/PEI ratio. In conclusion, we successfully designed a dual-network structure with a controlled pore size via changes made to the Si-precursor and/or to the Si-precursor/PEI mixing ratio.

show abstract

PEO-rich semi-interpenetrating polymer network (s-IPN) membranes for CO2 separation

Cited by 34 publications

References 35 publications

Construction of Microporous Polyimides with Tunable Pore Size and High CO₂ Selectivity Based on Cross-Linkable Linear Polyimides

Construction of Microporous Polyimides with Tunable Pore Size and High CO₂ Selectivity Based on Cross-Linkable Linear Polyimides

Damping, thermal, and mechanical performances of a novel semi‐interpenetrating polymer networks based on polyimide/epoxy

Pore Structure Controllability and CO₂ Permeation Properties of Silica-Derived Membranes with a Dual-Network Structure

Contact Info

Product

Resources

About

PEO-rich semi-interpenetrating polymer network (s-IPN) membranes for CO2 separation

Cited by 34 publications

References 35 publications

Construction of Microporous Polyimides with Tunable Pore Size and High CO2 Selectivity Based on Cross-Linkable Linear Polyimides

Construction of Microporous Polyimides with Tunable Pore Size and High CO2 Selectivity Based on Cross-Linkable Linear Polyimides

Damping, thermal, and mechanical performances of a novel semi‐interpenetrating polymer networks based on polyimide/epoxy

Pore Structure Controllability and CO2 Permeation Properties of Silica-Derived Membranes with a Dual-Network Structure

Contact Info

Product

Resources

About

Construction of Microporous Polyimides with Tunable Pore Size and High CO₂ Selectivity Based on Cross-Linkable Linear Polyimides

Construction of Microporous Polyimides with Tunable Pore Size and High CO₂ Selectivity Based on Cross-Linkable Linear Polyimides

Pore Structure Controllability and CO₂ Permeation Properties of Silica-Derived Membranes with a Dual-Network Structure