Ionic liquid-functionalized LDH as catalytic-initiating nanoparticles for microwave-activated ring opening polymerization of ε-caprolactone

Bujok, Sonia; Konefał, Magdalena; Abbrent, Sabina; Pavlová, Ewa; Svoboda, Ján; Trhlíková, Olga; Walterová, Zuzana; Beneš, Hynek

doi:10.1039/c9re00399a

Cited by 9 publications

(24 citation statements)

References 44 publications

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“…According to our latest paper, IL-modified Ca 2+ /Al 3+ LDH nanoparticles can be considered as a functional nanofiller with catalytic/initiating effect on ROP of ε CL, which enables synthesis of organometallic catalyst-free PCL [ 19 ]. Since the ε CL polymerization in the presence of IL-functionalized LDH is initiated by adsorbed/interlayer water, the total amount of water in LDH must be lowered in order to produce a high molecular weight PCL.…”

Section: Resultsmentioning

confidence: 99%

“…Pristine LDH (Ca/Al) was synthesized from Ca(NO 3 ) 2 , Al(NO 3 ) 3 , NaOH and NaNO 3 by the co-precipitation method reported in our previous work [ 19 ]. The pristine LDH was heated at 500 °C (24 h) to receive a calcinated LDH (C-Ca/Al).…”

Section: Methodsmentioning

confidence: 99%

“…The growing polymer chain then forces clay delamination. The clay delamination can be even more intensive when ionic liquids (IL)s are used as organic modifiers and when the IL-modified LDH are exposed to microwave irradiation [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Due to low volatility, good chemical and thermal stability, as well as non-flammability, ILs have become popular additives for various polymer nanomaterials, especially for nanocomposites, in which they are currently used as solvents, surfactants, coupling agents and compatibilizers [ 20 ]. Moreover, it has been reported that ILs immobilized on the LDH surface exhibited catalytic-initiating effect on ROP of ε CL [ 18 , 19 ]. Water molecules from LDH (surface-adsorbed or intercalated) initiate ROP of ε CL, while IL-anions catalyze a polymerization reaction [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, it has been reported that ILs immobilized on the LDH surface exhibited catalytic-initiating effect on ROP of ε CL [ 18 , 19 ]. Water molecules from LDH (surface-adsorbed or intercalated) initiate ROP of ε CL, while IL-anions catalyze a polymerization reaction [ 19 ]. The higher water content in LDH means the higher number of active centers, which results in decreased molecular weight of the produced polycaprolactone (PCL).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Immobilized Ionic Liquid on Properties of Biodegradable Polycaprolactone/LDH Nanocomposites Prepared by In Situ Polymerization and Melt-Blending Techniques

2020

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The high capacity of calcinated layered double hydroxides (LDH) to immobilize various active molecules together with their inherent gas/vapor impermeability make these nanoparticles highly promising to be applied as nanofillers for biodegradable polyester packaging. Herein, trihexyl(tetradecyl)phosphonium decanoate ionic liquid (IL) was immobilized on the surface of calcinated LDH. Thus, the synthesized nanoparticles were used for the preparation of polycaprolactone (PCL)/LDH nanocomposites. Two different methods of nanocomposite preparation were used and compared: microwave-assisted in situ ring opening polymerization (ROP) of ε-caprolactone (εCL) and melt-blending. The in situ ROP of εCL in the presence of LDH nanoparticles with the immobilized IL led to homogenous nanofiller dispersion in the PCL matrix promoting formation of large PCL crystallites, which resulted in the improved mechanical, thermal and gas/water vapor barrier properties of the final nanocomposite. The surface-bonded IL thus acted as nanofiller surfactant, compatibilizer, as well as thermal stabilizer of the PCL/LDH nanocomposites. Contrary to that, the melt-blending caused a partial degradation of the immobilized IL and led to the production of PCL nanocomposites with a heterogenous nanofiller dispersion having inferior mechanical and gas/water vapor barrier properties.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of Immobilized Ionic Liquid on Properties of Biodegradable Polycaprolactone/LDH Nanocomposites Prepared by In Situ Polymerization and Melt-Blending Techniques

2020

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Microwave‐assisted ring‐opening copolymerization and property of polycarbonates

Feng

Mei

Fan

et al. 2021

Polymers for Advanced Techs

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Recently, the microwave‐assisted heating method has become a commonly used and environmentally friendly heating technology in the field of organic and polymeric synthetic chemistry. A series of poly(5,5‐dimethyl trimethylenecarbonate‐co‐2‐phenyl‐5,5‐bis[oxymethyl] trimethylenecarbonate) (P[DTC‐co‐PTC]) were synthesized by microwave‐assisted ring‐opening polymerization of 5,5‐dimethyl trimethylene carbonate (DTC) and 2‐phenyl‐5,5‐bis(oxymethyl) trimethylene carbonate (PTC) using tin(II) 2‐ethylhexanoate and aluminum isopropoxidase, the catalysts. These co‐polycarbonates were further reduced by a palladium‐carbon catalyst (Pd/C catalyst, 10%) to make partly deprotected polycarbonates (HPDPC). These two co‐polycarbonates were characterized by gel permeation chromatography, 1HNMR, Fourier transform infrared spectroscopy, UV, differential scanning calorimetry, and automatic contact‐angle measurements. The influences of the microwave irradiation time, microwave power, monomer feed molar ratio, different catalysts, and monomer/catalyst feed molar ratio on the molecular weights of co‐polycarbonates were also investigated. In vitro water absorption, degradation and drug release tests indicated that partly deprotected co‐polycarbonate HPDPC possessed greater hydrophilicity, faster degradation rate, and faster drug release rate than that of corresponding P(DTC‐co‐PTC). Therefore, microwave‐assisted polymerization is a clean and cheap heating method and can be used for ring‐opening copolymerization of carbonates, which enhances the hydrophilicity and biodegradation rate of aliphatic polycarbonates.

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Imidazole-functionalized nitrogen-rich Mg-Al-CO3 layered double hydroxide for developing highly crosslinkable epoxy with high thermal and mechanical properties

Seidi

Jouyandeh

Paran

et al. 2021

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Ionic liquid-functionalized LDH as catalytic-initiating nanoparticles for microwave-activated ring opening polymerization of ε-caprolactone

Abstract: Layered double hydroxides with ionic liquid as highly active catalytic-initiating system for microwave-assisted ring opening polymerization of ε-caprolactone.

Cited by 9 publications

References 44 publications

Effects of Immobilized Ionic Liquid on Properties of Biodegradable Polycaprolactone/LDH Nanocomposites Prepared by In Situ Polymerization and Melt-Blending Techniques

Effects of Immobilized Ionic Liquid on Properties of Biodegradable Polycaprolactone/LDH Nanocomposites Prepared by In Situ Polymerization and Melt-Blending Techniques

Microwave‐assisted ring‐opening copolymerization and property of polycarbonates

Imidazole-functionalized nitrogen-rich Mg-Al-CO3 layered double hydroxide for developing highly crosslinkable epoxy with high thermal and mechanical properties

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