Synthesis of silica particles grafted with poly(ionic liquid) and their nucleation effect on microcellular foaming of polystyrene using supercritical carbon dioxide

Yang, Jintao; Sang, Yan; Chen, Feng; Fei, Zhengdong; Zhong, Ming

doi:10.1016/j.supflu.2011.11.024

Cited by 34 publications

(35 citation statements)

References 26 publications

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“…Therefore, porous organic materials such as triazine based microporous polycarbazoles (PCBZ), 83 nanoporous organic frameworks (NPOF-4), 84 porous polymer networks (PPN-80), 85 conjugated microporous polymers (CMP-1-COOH), 71 microporous polyimides (PI-1), 86 porous aromatic frameworks (PAF-1) 87 and hypercrosslinked polymers (HCP-1) 88 have been designed for better CO 2 sorption. Among the PILs as shown in Table 2, clPIL-2 taken up the highest carbon dioxide (20.24 mg g -1 ) at low pressure (1bar) that encourages for opportunities to tailor and design new PILs leading to increase in CO 2 sorption performance especially by immobilizing these PILs on various supports, 89 changing the polycation and increase of porosity. PIL-8a,b bearing BF 4 and PF 6 displayed CO 2 sorption capacities 17.09 and 14.60 mg g -1 respectively as reported by Tang et al based on mole percentages of monomer units.…”

Section: Comparison With Other Sorbents and Future Outlookmentioning

confidence: 99%

Polymeric ionic liquids for CO₂ capture and separation: potential, progress and challenges

2015

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Section: Comparison With Other Sorbents and Future Outlookmentioning

confidence: 99%

Polymeric ionic liquids for CO₂ capture and separation: potential, progress and challenges

2015

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“…Supercritical CO 2 (scCO 2 ) called "Green Solvent" has been used in a variety of industries, including plastics, chemical, pharmaceutical, and food. In the plastics industry, scCO 2 has been used for various polymer-processing purposes such as polymer blending [12] [13], polymer foaming [14] [15], preparation of microcapsules [16] [17], and additive impregnation [18] [19]. It can be said that the critical point of CO 2 is suitable for processing of polymer.…”

Section: Introductionmentioning

confidence: 99%

Supercritical Fluid Impregnation of Essential Bark Oil in Copolymers of L-Lactide with 7-Membered Cyclic Compounds

Tsutsumi

Hara²,

Ueno³

et al. 2014

JBNB

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In order to develop a novel controlled-release material, we previously attempted to impregnate poly(L-lactide) (poly(L-LA)), poly(L-LA-ran-CL) (CL: ε-caprolactone) or poly(L-LA-ran-TEMC) (TEMC: tetramethylene carbonate) with low boiling point, organic useful compounds using supercritical carbon dioxide (scCO2) as the solvent. In this work, the factors influencing impregnation of poly (L-LA) random copolymers with useful compounds were investigated under scCO2 using the copolymers previously used. The influence of temperature, pressure, and time on the impregnation contents of the useful compounds on the copolymers was evaluated. The polymer used, which is a base of this material, was poly(L-LA-ran-CL), poly(L-LA-ran-TEMC), or poly(L-LA-ran-DXO) (DXO: 1,5-dioxepan-2-one). Statistical random copolymers of L-LA with CL, TEMC, or DXO were synthesized using Sn(oct)2 as a catalyst at 150˚C for 24 h without solvent. Preparation of the controlled-release materials was carried out using essential bark oil from Thujopsis dolabrata var. hondae and synthetic L-LA random copolymers as a base material under scCO2. The impregnation experiment, which investigated the influence of pressure, was conducted in the range of 10 to 20 MPa. The influence of temperature on impregnation was carried out at 40˚C to 100˚C. Impregnation time was varied from 1 to 5 h.

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“…However, most heterogeneous nucleation agents are CO 2 -phobic, decreasing the concentration of blowing agent, and deteriorating the nucleation efficiency. Recently, a lot of research activities have been devoted for compensating this blowing agent concentration loss by surface modification or other technique to make the nucleation agent CO 2 -philic [9,10]. For polystyrene foams, one of main drawbacks which limit their application is the low thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ionic liquids copolymerize styrene and their nucleation, carbon dioxide sorption effect on supercritical carbon dioxide microcellular foaming

Zhong

Yang

2015

J Polym Res

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Aiming to prepare polystyrene microcellular foam with improved foam morphology and high thermal stability, ionic liquids which have been well demonstrated to possess high carbon dioxide (CO 2 ) absorption capacity were introduced into polystyrene by copolymerization of styrene and polymerizable ionic liquids, i.e., vinylbenzyl trimethyl ammonium fluoroborate ([VBTMA][BF 4 ]) and vinylbenzyl trimethyl ammonium hexafluorophosphate ([VBTMA][PF 6 ]), Abbr. ILs). These copolymers showed higher glass transition temperature (T g ) and high supercritical carbon dioxide (scCO 2 ) solubility, based on which foams with smaller cell size, higher cell density, and higher thermal stability were prepared by the microcellular foaming using scCO 2 as blowing agent. The morphology of the resultant foams highly depended on the foaming temperature, ionic liquid type and content. Compared to [VBTMA] [BF 4 ]-St foam, [VBTMA][PF 6 ]-St have higher CO 2 absorption and glasstransition temperature, making it exhibit superior cell morphology. This work demonstrates that the introduction of ionic liquids can benefit the morphology control and thermal stability of polymeric foams and hopefully provides a promising method for the design and preparation of polymeric foams with high performance.

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Synthesis of silica particles grafted with poly(ionic liquid) and their nucleation effect on microcellular foaming of polystyrene using supercritical carbon dioxide

Cited by 34 publications

References 26 publications

Polymeric ionic liquids for CO₂ capture and separation: potential, progress and challenges

Polymeric ionic liquids for CO₂ capture and separation: potential, progress and challenges

Supercritical Fluid Impregnation of Essential Bark Oil in Copolymers of L-Lactide with 7-Membered Cyclic Compounds

Synthesis of ionic liquids copolymerize styrene and their nucleation, carbon dioxide sorption effect on supercritical carbon dioxide microcellular foaming

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Synthesis of silica particles grafted with poly(ionic liquid) and their nucleation effect on microcellular foaming of polystyrene using supercritical carbon dioxide

Cited by 34 publications

References 26 publications

Polymeric ionic liquids for CO2 capture and separation: potential, progress and challenges

Polymeric ionic liquids for CO2 capture and separation: potential, progress and challenges

Supercritical Fluid Impregnation of Essential Bark Oil in Copolymers of L-Lactide with 7-Membered Cyclic Compounds

Synthesis of ionic liquids copolymerize styrene and their nucleation, carbon dioxide sorption effect on supercritical carbon dioxide microcellular foaming

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Product

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Polymeric ionic liquids for CO₂ capture and separation: potential, progress and challenges

Polymeric ionic liquids for CO₂ capture and separation: potential, progress and challenges