The FT-IR studies of the interactions of CO2 and polymers having different chain groups

Nalawade, S.P.; Picchioni, Francesco; Marsman, Jan Henk; Janssen, L.P.B.M.

doi:10.1016/j.supflu.2005.06.005

Cited by 99 publications

(65 citation statements)

References 18 publications

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“…Such hysteresis confirmed modifications in the physical state of the polymer, as a result of physical interactions like plasticization or swelling. PLA, as other polyesters, is known to establish low energy interactions (of Lewis acid-base nature) between CO 2 molecules (electron acceptor) and carbonyl groups of the polymer (electron donor), which leads to plasticization and swelling [22,[34][35][36]. As a result, PLA chains are becoming more spaced, PLA intermolecular interactions reduce, the system mobility increases and new sorption sites are exposed, favoring therefore CO 2 sorption [22,33,37].…”

Section: Resultsmentioning

confidence: 99%

How high pressure CO2 impacts PLA film properties

Rocca-Smith¹,

Lagorce-Tachon²,

Iaconelli³

et al. 2017

Express Polym. Lett.

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Abstract. This work investigated the sorption and the diffusion properties of CO 2 under high pressure and the further modifications induced in Poly(lactic acid) (PLA) thin layers. Poly(ethylene terephtalate) (PET) was also considered for comparative purposes. Firstly, from thermodynamic equilibrium, the CO 2 sorption isotherm (two sorption-desorption cycles, up to 25 bar, at 25°C) gave strong evidence of a physisorption mechanism and of a hysteresis phenomenon. Infrared spectroscopy analysis confirmed that no chemical reaction occurred. Secondly, from the kinetics aspect, the CO 2 diffusion coefficient was found around 10 -13 m 2 ·s -1 and was slightly faster for sorption compared to desorption. Additionally, when CO 2 sorption occurred, the PLA structure and its functional properties were modified due to plasticization and swelling. CO 2 plasticization reduced the glass transition temperature of PLA and accelerated the physical ageing of the polymer. These results are therefore of significant importance in industrial processing and applications which involve close contact between CO 2 and PLA.

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Section: Resultsmentioning

confidence: 99%

How high pressure CO2 impacts PLA film properties

Rocca-Smith¹,

Lagorce-Tachon²,

Iaconelli³

et al. 2017

Express Polym. Lett.

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show abstract

“…However, we cannot exclude the possibility that there is a contribution from the dipole-quadrupole interactions between polar groups within the membranes and CO2 (Huang, 1973;Nalawade et al, 2006). Even though the dipole moment for CO2 is zero, the quadrupole moment is not (Kim and Kim, 2008).…”

Section: Asymmetric Stretching (υ3) Vibrational Mode Of Co2mentioning

confidence: 92%

ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes

Hosakun

Halász

Horváth

et al. 2017

Chemical Engineering Journal

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“…However, there is a number of processing parameters can greatly influence the properties of the generated fibers, such as viscoelastic force and surface tension which has been found to depend on solution concentration [7][8][9][10]. Recently there has been a great deal of progress in the potential applications of hollow fibers in microfluids, photonics, and energy storage [2,3,6,11,12]. However, the fabrication of hollow fibers was still by template processes or using coaxial capillary.…”

Section: Introductionmentioning

confidence: 99%

“…The special combination of gas-like viscosity and liquid-like density of a supercritical fluid makes it an excellent solvent for various applications. Supercritical fluids have been used successfully as solvents, antisolvents, or plasticizers in polymer processings; e.g., polymer modification, polymer composites, polymer blending, microcellular foaming, particle production, and in polymer synthesis [9,10,12,13]. Carbon dioxide (CO2) is the most commonly used supercritical fluid because of its low critical temperature (Tc = 304 K) and pressure (Pc = 7.38 MPa), low toxicity and high purity at a low cost.…”

Section: Introductionmentioning

confidence: 99%