1987
DOI: 10.1016/0009-2509(87)80213-0
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Temperature sensitive gels as extraction solvents

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Cited by 343 publications
(143 citation statements)
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“…Three mechanisms, possibly working in concert, may account for the asymmetry in swelling bracketing hydrogel IV: (1) Differences in cross-…”
Section: 8)mentioning
confidence: 99%
“…Three mechanisms, possibly working in concert, may account for the asymmetry in swelling bracketing hydrogel IV: (1) Differences in cross-…”
Section: 8)mentioning
confidence: 99%
“…Among these stimuli-responsive polymers, temperature-responsive hydrogels such as poly(Nisopropylacrylamide) [P(N-iPAAm)] are a well-studied class of drug delivery systems, as they can respond strongly to temperature changes. In water, P(N-iPAAm) exhibits a phase transition at a lower critical solution temperature (LCST) of approximately 33ºC (Freitas & Cussler, 1987). Below the LCST, the hydrogel incorporates water and swells, whereas the release of water in response to an increase in temperature causes shrinkage.…”
Section: General Aspectsmentioning
confidence: 99%
“…Among these stimuli-responsive polymers, the most important systems from a biomedical point of view are those sensitive to pH and/or temperature, because variables such as low pH and elevated temperatures are found in the body (Qui & Park, 2001). One of the most studied temperature-responsive polymers is poly(N-isopropylacrylamide) [P(N-iPAAm)], which swells to a large extent in water, at a low temperature, and shrinks as the temperature is increased, showing a first-order phase transition around 33 ºC, behaving as a polymer solution with a lower critical solution temperature (LCST) (Freitas & Cussler, 1987). Figure 10 shows this phase behavior schematically.…”
Section: Functional Hybrid Mesoporous Silica/poly(n-isopropylacrilamimentioning
confidence: 99%
“…O gel poli(N-isopropilacrilamida), objeto de estudo deste trabalho, tem sido aplicado em processos de concentração de soluções de proteí-nas e de outras macromoléculas, como solvente extrator [9][10][11] . Este gel, absorve, à temperatura ambiente, mais de trinta vezes o seu peso em água.…”
Section: Introductionunclassified