Poly(ethylene glycol) Diacrylate Iongel Membranes Reinforced with Nanoclays for CO2 Separation

Despite the fact that iongels are very attractive materials for gas separation membranes, they often show mechanical stability issues mainly due to the high ionic liquid (IL) content (≥60 wt%) needed to achieve high gas separation performances. This work investigates a strategy to improve the mechanical properties of iongel membranes, which consists in the incorporation of montmorillonite (MMT) nanoclay, from 0.2 to 7.5 wt%, into a cross-linked poly(ethylene glycol) diacrylate (PEGDA) network containing 60 wt% of the IL 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][TFSI]). The iongels were prepared by a simple one-pot method using ultraviolet (UV) initiated polymerization of poly(ethylene glycol) diacrylate (PEGDA) and characterized by several techniques to assess their physico-chemical properties. The thermal stability of the iongels was influenced by the addition of higher MMT contents (>5 wt%). It was possible to improve both puncture strength and elongation at break with MMT contents up to 1 wt%. Furthermore, the highest ideal gas selectivities were achieved for iongels containing 0.5 wt% MMT, while the highest CO2 permeability was observed at 7.5 wt% MMT content, due to an increase in diffusivity. Remarkably, this strategy allowed for the preparation and gas permeation of self-standing iongel containing 80 wt% IL, which had not been possible up until now.

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Influence of Anion Structure on Thermal, Mechanical and CO2 Solubility Properties of UV-Cross-Linked Poly(ethylene glycol) Diacrylate Iongels

Membranes ◽

10.3390/membranes10030046 ◽

2020 ◽

Vol 10 (3) ◽

pp. 46

Author(s):

Ana P. S. Martins ◽

Asier Fdz De Añastro ◽

Jorge L. Olmedo-Martínez ◽

Ana R. Nabais ◽

Luísa A. Neves ◽

...

Keyword(s):

Ethylene Glycol ◽

High Performance ◽

Mechanical Stability ◽

Gas Permeability ◽

Co2 Separation ◽

Poly Ethylene Glycol ◽

Co2 Solubility ◽

Free Standing ◽

Glycol Diacrylate ◽

Poly Ethylene

Iongel-based CO2 separation membranes were prepared by fast (< 1 min) UV-initiated polymerization of poly(ethylene glycol) diacrylate (PEGDA) in the presence of different ionic liquids (ILs) with the [C2mim]+ cation and anions such as [TFSI]−, [FSI]−, [C(CN)3]− and [B(CN)4]−. The four ILs were completely miscible with the non-ionic PEGDA network. Transparent and free-standing iongels containing between 60 and 90 %wt of IL were obtained and characterized by diverse techniques (FTIR, TGA, DSC, DMTA, SEM, CO2 solubility and pure gas permeability). The thermal and mechanical stability of the iongels, as well as CO2 solubility, were found to be strictly dependent on the IL content and the anion’s nature. The TGA results indicated that the iongels mostly follow the thermal profile of the respective neat ILs. The DMTA analysis revealed that the iongels based on fluorinated anions have higher storage modulus than those of cyano-functionalized anions. Conversely, the PEGDA–C(CN)3 iongels presented the highest CO2 solubility values ranging from 72 to 80 mmol/g. Single CO2 permeabilities of 583 ± 29 Barrer and ideal CO2/N2 selectivities of 66 ± 3 were obtained with the PEGDA–70 C(CN)3 iongel membrane. This work demonstrates that the combination of PEGDA with high contents of the best performing ILs is a promising and simple strategy, opening up new possibilities in the design of high-performance iongel membranes for CO2 separation.

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Gas Permeation and Diffusion in Cross-Linked Poly(ethylene glycol diacrylate)

Macromolecules ◽

10.1021/ma051686o ◽

2006 ◽

Vol 39 (10) ◽

pp. 3568-3580 ◽

Cited By ~ 111

Author(s):

Haiqing Lin ◽

Benny D. Freeman

Keyword(s):

Ethylene Glycol ◽

Gas Permeation ◽

Poly Ethylene Glycol ◽

Glycol Diacrylate ◽

Poly Ethylene ◽

And Diffusion

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pH-Responsive Hyperbranched Copolymers from One-Pot RAFT Copolymerization of Propylacrylic Acid and Poly(ethylene glycol diacrylate)

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.77.333 ◽

2012 ◽

Vol 77 ◽

pp. 333-342 ◽

Cited By ~ 1

Author(s):

Hong Yun Tai ◽

Craig L. Duvall ◽

Patrick S. Stayton ◽

Alan S. Hoffman ◽

Wen Xin Wang

Keyword(s):

Ethylene Glycol ◽

Proton Nuclear Magnetic Resonance ◽

Therapeutic Drug ◽

Copolymer Composition ◽

Ph Responsive ◽

Poly Ethylene Glycol ◽

One Pot ◽

Glycol Diacrylate ◽

Monomer Feed ◽

Poly Ethylene

pH-Responsive polymers have attracted much attention for biotechnology applications as carriers or matrix to facilitate intracellular or extracellular therapeutic drug delivery and release. In this paper, we report the development of new pH-responsive and hyperbranched copolymers with potential for such applications. These pH-responsive hyperbranched copolymers were synthesized via one pot reversible addition-fragmentation chain transfer (RAFT) copolymerization of propylacrylic acid (PAA) and a branching co-monomer poly(ethylene glycol diacrylate) (PEGDA) (Mn=258 Da) at the monomer feed molar ratios [PAA]0/[PEGDA]0 = 99/1, 90/10 and 80/20. The resultant poly(PAA-PEGDA) copolymers were characterized by Proton Nuclear Magnetic Resonance (1H NMR) and Gel Permeation Chromatography (GPC) to obtain the molecular weight, copolymer composition and degree of acrylate functionality. The hydrodynamic dimensions of these copolymers at pH range between 5.0 and 7.4 were studied using Dynamic Light Scattering technique (DLS). Moreover, these hyperbranched copolymers demonstrated composition- and size-dependent membrane disruptive properties by red blood cell hemolysis assay. Poly(PAA-PEGDA) with the copolymer composition [PAA]/[PEGDA]= 68/32, obtained from the copolymerization at the monomer feed molar ratio [PAA]0/[PEGDA]0 = 99/1, demonstrated significant membrane disruptive activity.

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Development of poly(ethylene glycol) diacrylate membrane for facilitated CO2/N2 separation

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1195/1/012019 ◽

2021 ◽

Vol 1195 (1) ◽

pp. 012019

Author(s):

T P Kim ◽

Z A Jawad ◽

B L F Chin

Keyword(s):

Carbon Dioxide ◽

Ethylene Glycol ◽

Gas Separation ◽

Global Climate ◽

Membrane Surface ◽

Separation Performance ◽

Poly Ethylene Glycol ◽

Glycol Diacrylate ◽

Poly Ethylene ◽

Gas Separation Performance

Abstract Carbon dioxide (CO2) is responsible for approximately 80% of greenhouse gases emission that is the main source to global climate change causing notable environmental impacts. Poly (ethylene glycol) diacrylate (PEGDA) have polar PEG repeating units, which provide a strong affinity towards carbon dioxide (CO2) molecules has been blended with 3-aminopropyltrimethoxysilane (APTMS) to synthesize membrane for CO2/nitrogen (N2) separation. The new synthesized membrane is studied for potential applications in gas separation and to be implemented in control CO2 emission. APTMS is also used to delay the diffusion between polymer and solvent. In this study, concentration of polymer of PEGDA and casting solvent of APTMS in terms of mol ratio from a range of 0.9:1.1 to 1.3:0.7 is discussed. Based on the results, PEGDA membrane shows best gas separation performance at mol ratio of PEGDA to APTMS of 1:1 where the permeance for both CO2/N2, and CO2/N2 selectivity are 75.21±0.15 GPU, 22.95±0.05 GPU and 3.28±0.12, respectively. An optimal aminosilane/polymer reaction ratio benefits the gas separation performance of the membrane due to the affinity of the membrane towards CO2 and formation of different membrane surface morphology.

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The Glucose-Responsive Nanogel Based on Phenylboronic Acid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.680.42 ◽

2014 ◽

Vol 680 ◽

pp. 42-45 ◽

Cited By ~ 1

Author(s):

Li Zhao ◽

Li Yan Wang ◽

Guang Qing Gai

Keyword(s):

Ethylene Glycol ◽

High Glucose ◽

Phenylboronic Acid ◽

Insulin Injection ◽

Practical Significance ◽

Poly Ethylene Glycol ◽

One Pot ◽

Glycol Diacrylate ◽

Poly Ethylene ◽

Glucose Responsiveness

Diabetes mellitus, following cancer and cardiovascular disease, become one of the most serious diseases that threat to human health. The treatment of diabetes is imminent for the health of people. Thus, the developments of efficient insulin administration exhibit great practical significance. The glucose-responsive insulin delivery system (GRIDS) is developing rapidly which is expected to be a promising therapy approach to replace the frequent insulin injection administration. A novel glucose-responsive nanogel was conveniently prepared through one-pot copolymerization of pentaerythritol tetra (3-mercaptopropionate), poly (ethylene glycol) diacrylate, methoxyl poly (ethylene glycol) acrylate and N-acryloyl-3-aminophenylboronic acid. The successful incorporation of phenylboronic acid (PBA) in the nanogel endowed the nanogel high glucose sensitivity in phosphate buffer saline (PBS). Therefore, the PBA incorporated nanogel with high glucose-responsiveness and good biocompatibility may have great potential for self-regulated drug release

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