Thematische Bibliographien / UCST in water

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Auswahl der wissenschaftlichen Literatur zum Thema „UCST in water“

Autor: Grafiati
Veröffentlicht am 25. Mai 2024

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Zeitschriftenartikel zum Thema "UCST in water"

1

Safi, Syed Ragib, Toshiki Kaneko, Katsuhiro Nakahara, Takehiko Gotoh, and Takashi Iizawa. "The Removal of Hydrophobic Matter from Thermosensitive Poly[oligo(ethylene glycol) Monomethyl Ether Acrylate] Gel Adsorbent in Alcohol–Water Mixtures." Gels 8, no. 4 (2022): 200. http://dx.doi.org/10.3390/gels8040200.

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A thermosensitive gel that exhibits lower critical solution temperature (LCST) becomes hydrophilic at low temperatures and hydrophobic at high temperatures in water. A system for absorbing hydrophobic organic matters that exploits this property has been reported. While washing the gel at a low temperature with a good solvent is a possible method for removing the adsorbed matter, a process that then shrinks the gel is also required. Herein, we focused on poly[oligo(ethylene glycol) mono(m)ethyl ether acrylate] (POEGA) gels as thermosensitive gels suitable for use in this system. POEGAs are known to contain poly(ethylene glycol) (PEG) units in their side chains and exhibit upper critical solution temperature (UCST) behavior in aliphatic alcohols. By exploiting this property, we developed a method for removing hydrophobic matters that accumulate in these gels; we also evaluated the LCST and UCST behavior of POEGA gels in alcohol–water mixtures, and measured the LCSTs of these gels in water and their UCSTs in some alcohols.
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2

Pham, Thu Thao, and Shin-ichi Yusa. "Thermo-Responsive Polyion Complex of Polysulfobetaine and a Cationic Surfactant in Water." Polymers 14, no. 15 (2022): 3171. http://dx.doi.org/10.3390/polym14153171.

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Poly(4-((3-methacrylamidopropyl)dimethylammonium)butane-1-sulfonate) (PSBP) was prepared via controlled radical polymerization. PSBP showed upper critical solution temperature (UCST) behavior in aqueous solutions, which could be controlled by adjusting the polymer and NaCl concentrations. Owing to its pendant sulfonate anions, PSBP exhibited a negative zeta potential of −7.99 mV and formed a water-soluble ion complex with the cationic surfactant cetyltrimethylammonium bromide (CTAB) via attractive electrostatic interaction. A neutral PSBP/CTAB complex was formed under equimolar concentrations of the pendant sulfonate group in PSBP and the quaternary ammonium group in CTAB. Transmittance electron microscopic images revealed the spherical shape of the complex. The stoichiometrically neutral-charge PSBP/CTAB complex exhibited UCST behavior in aqueous solutions. Similar to PSBP, the phase transition temperature of the PSBP/CTAB complex could be tuned by modifying the polymer and NaCl concentrations. In 0.1 M aqueous solution, the PSBP/CTAB complex showed UCST behavior at a low complex concentration of 0.084 g/L, whereas PSBP did not exhibit UCST behavior at concentrations below 1.0 g/L. This observation suggests that the interaction between PSBP and CTAB in the complex was stronger than the interpolymer interaction of PSBP.
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3

Sun, Wenhui, and Peiyi Wu. "A molecular level study of the phase transition process of hydrogen-bonding UCST polymers." Physical Chemistry Chemical Physics 20, no. 32 (2018): 20849–55. http://dx.doi.org/10.1039/c8cp04147d.

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4

Saita, Shohei, Yuki Mieno, Yuki Kohno, and Hiroyuki Ohno. "Ammonium based zwitterions showing both LCST- and UCST-type phase transitions after mixing with water in a very narrow temperature range." Chem. Commun. 50, no. 97 (2014): 15450–52. http://dx.doi.org/10.1039/c4cc06210h.

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5

Higashi, Nobuyuki, Ryo Sonoda, and Tomoyuki Koga. "Thermo-responsive amino acid-based vinyl polymers showing widely tunable LCST/UCST behavior in water." RSC Advances 5, no. 83 (2015): 67652–57. http://dx.doi.org/10.1039/c5ra13009c.

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6

Asadujjaman, Asad, Tiago Espinosa de Oliveira, Debashish Mukherji, and Annabelle Bertin. "Polyacrylamide “revisited”: UCST-type reversible thermoresponsive properties in aqueous alcoholic solutions." Soft Matter 14, no. 8 (2018): 1336–43. http://dx.doi.org/10.1039/c7sm02424j.

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7

Yao, Wenhui, Huiyong Wang, Guokai Cui, Zhiyong Li, and Jianji Wang. "Tuning phase behaviour of PEG-functionalized ionic liquids from UCST to LCST in alcohol–water mixtures." Physical Chemistry Chemical Physics 18, no. 42 (2016): 29192–98. http://dx.doi.org/10.1039/c6cp05668g.

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8

Asadujjaman, Asad, Vahid Ahmadi, Meral Yalcin, Niels ten Brummelhuis, and Annabelle Bertin. "Thermoresponsive functional polymers based on 2,6-diaminopyridine motif with tunable UCST behaviour in water/alcohol mixtures." Polymer Chemistry 8, no. 20 (2017): 3140–53. http://dx.doi.org/10.1039/c7py00539c.

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9

Zhang, Hu, Shengwei Guo, Weizheng Fan, and Yue Zhao. "Ultrasensitive pH-Induced Water Solubility Switch Using UCST Polymers." Macromolecules 49, no. 4 (2016): 1424–33. http://dx.doi.org/10.1021/acs.macromol.5b02522.

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10

Seuyep N., Denis H., Daniel Szopinski, Gerrit A. Luinstra, and Patrick Theato. "Post-polymerization modification of reactive polymers derived from vinylcyclopropane: a poly(vinylcyclopropane) derivative with physical gelation and UCST behaviour in ethanol–water mixtures." Polym. Chem. 5, no. 19 (2014): 5823–28. http://dx.doi.org/10.1039/c4py00740a.

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