Water-enriched poly(ionic liquid)s: highly-efficient microreactors for the hydrolysis of ethylene carbonate

Zhang, Yongya; Chen, Bihua; Zhang, Yifeng; Qin, Li; Liu, Bo; Ni, Bing; Gao, Guohua

doi:10.1039/c7gc03773b

Cited by 39 publications

(23 citation statements)

References 45 publications

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“…SPILs’ quasi‐homogeneous nature, abundant catalytic active sites, and tunable swelling ability make them ideal candidates for new catalyst design and application. On the basis of our collective interests in SPILs and catalysis, we had prepared SPILs with high swelling ability in ethylene carbonate, water and formic acid, and applied them to catalyze the reaction of ethylene carbonate with aniline, [7a] 2‐(phenylamino) ethanol [7b] and water [7c] . Recently, we reported acidic SPILs as efficient catalysts for esterification and hydrolysis reactions [7d,e] …”

Section: Introductionmentioning

confidence: 99%

Urea‐Functionalized Swelling Poly(ionic liquid)s as Efficient Catalysts for the Transesterification and Hydrolysis of Ethylene Carbonate

Wang

Chen

et al. 2021

ChemCatChem

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Urea-functionalized poly(ionic liquid)s (PILs) were synthesized through polymerization of urea tethered imidazolium ionic liquid monomers (urea-IL) with sodium acrylate, and N,N'methylenebisacrylamide (MBA) as a crosslinker. Close-packed and interconnected pores (1-4 mm) under swollen state could be observed from the cryogenic scanning electron microscopy (cryo-SEM) images. The promising catalytic activity of the PILs was illustrated for the transesterification reaction of ethylene carbonate with methanol. High activity and selectivity could be achieved by using poly(urea-IL)-n catalysts, which was similar to that of corresponding homogeneous ionic liquid catalysts. The urea tethered imidazolium in PILs acted as hydrogen-bonding donor to activate ethylene carbonate and intermediate 2hydroxyethyl methyl carbonate (HEMC) for enhancing catalytic activity. The swelling ability of urea-functionalized PILs in methanol enabled active urea sites accessible for substrates. However, the complete conversion of ethylene carbonate was limited by reversible reaction between ethylene carbonate and HEMC. A possible synergistic activation mechanism for the transesterification reaction was proposed and supported by NMR titrations. The catalyst can be reused and recycled five times with stable activity. Furthermore, urea-functionalized swelling PILs also exhibited high catalytic activity for the hydrolysis of ethylene carbonate.

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Section: Introductionmentioning

confidence: 99%

Urea‐Functionalized Swelling Poly(ionic liquid)s as Efficient Catalysts for the Transesterification and Hydrolysis of Ethylene Carbonate

Wang

Chen

et al. 2021

ChemCatChem

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“…The band at 1113 cm −1 was attributed to the stretching vibration of the C−O bonds in ether groups. 41 TG analysis (Figure 1c) showed that PIL@ Mesh was stable up to 240 °C, which was the same as PIL, indicating that the mesh did not have an influence on the stability of PIL. The organic component of PIL@Mesh was decomposed completely and the sintered wire mesh was stable under 800 °C.…”

Section: Resultsmentioning

confidence: 94%

“…With the ice removed by vacuum sublimation for 1 h, as can be seen from Figure 2f, the swollen state 3D polymer networks were exposed gradually. 41 Magnified view (Figure 2g,h) showed more clearly that the PIL 3D networks were interspersed between the wire mesh. The original pore structures in the wire mesh were reconstituted by the swollen PIL 3D networks, and the rectangular pores with the size of 5− 20 μm were formed in PIL@Mesh.…”

Section: Resultsmentioning

confidence: 99%

Swelling Poly(ionic liquid) Supported by Three-Dimensional Wire Mesh for Oil/Water Separation

Zhang

Deng

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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A kind of oil/water separation membrane, combining poly(ionic liquid) (PIL) and three-dimensional (3D) wire mesh, was designed and prepared via one-step photopolymerization of an ionic liquid monomer 1,8triethylene glycoldiyl-3,3′-divinylimidazolium dibromide ([DVIm-(EG) 3 ]Br 2 ) with acrylic acid in the mesh. The composite membrane (PIL@Mesh) had the advantages of anti-oil-adhesion property and high mechanical strength simultaneously. The morphology of PIL@Mesh characterized by scanning electron microscopy (SEM) and Cryo-SEM demonstrated that PIL swelled in water to construct microscale 3D networks. The 3D networks of swelling PIL were capable of forming a hydration layer and endowed PIL@Mesh with superhydrophilicity, which made the membrane to transport water but to intercept oil. PIL@Mesh showed excellent separation efficiency (above 99.9%) for various oil/water mixtures, large water flux (47 L•m −2 •s −1 ), and high intrusion pressure (1.2 kPa). Meanwhile, it performed well in recyclability and corrosion-resistant under harsh conditions, such as acid, alkaline, and salty environments.

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“…Recently, we developed a series of carboxylate-based poly(ionic liquid)s (PILs) with high swelling abilities in ethylene carbonate [26][27][28]. These PILs were used as efficient catalysts for the transformation of ethylene carbonate, and their activity was comparable with that of the corresponding homogeneous ILs.…”

Section: Introductionmentioning

confidence: 99%

Honeycomb-structured solid acid catalysts fabricated via the swelling-induced self-assembly of acidic poly(ionic liquid)s for highly efficient hydrolysis reactions

Chen

Ding

Deng

et al. 2021

Chinese Journal of Catalysis

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Water-enriched poly(ionic liquid)s: highly-efficient microreactors for the hydrolysis of ethylene carbonate

Abstract: Water enrichment ability increased the catalytic efficiency of PIL microreactors in the hydrolysis of EC.

Cited by 39 publications

References 45 publications

Urea‐Functionalized Swelling Poly(ionic liquid)s as Efficient Catalysts for the Transesterification and Hydrolysis of Ethylene Carbonate

Urea‐Functionalized Swelling Poly(ionic liquid)s as Efficient Catalysts for the Transesterification and Hydrolysis of Ethylene Carbonate

Swelling Poly(ionic liquid) Supported by Three-Dimensional Wire Mesh for Oil/Water Separation

Honeycomb-structured solid acid catalysts fabricated via the swelling-induced self-assembly of acidic poly(ionic liquid)s for highly efficient hydrolysis reactions

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