Bile-salt-induced aggregation of poly(N-isopropylacrylamide) and lowering of the lower critical solution temperature in aqueous solutions

Anitha C. Kumar; Harikrishna Erothu; Himadri B. Bohidar; Ashok K. Mishra

doi:10.1021/jp109056u

Bile-salt-induced aggregation of poly(N-isopropylacrylamide) and lowering of the lower critical solution temperature in aqueous solutions

Anitha C. Kumar, Harikrishna Erothu, Himadri B. Bohidar, Ashok K. Mishra

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of sodium cholate (NaC; concentration 1-16 mM), a biological surfactant, on the aggregation behavior of 1% (w/v, 2.2 × 10(-3) M) poly(N-isopropylacrylamide) (PNIPAM) aqueous solutions was studied as a function of temperature. From turbidity, dynamic light scattering, viscosity, and fluorescence measurements, it was observed that (i) there is NaC-induced nanoscale aggregation of PNIPAM in its sol state and (ii) the lower critical solution temperature corresponding to sol-gel transition shifts to a lower temperature by about 2 °C.

Original language	English
Pages (from-to)	433-439
Number of pages	7
Journal	Journal of Physical Chemistry: Part B
Volume	115
Issue number	3
DOIs	https://doi.org/10.1021/jp109056u
Publication status	Published - 3 Dec 2011

Keywords

sodium cholate
aggregation behavior

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10.1021/jp109056u

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abstract = "The effect of sodium cholate (NaC; concentration 1-16 mM), a biological surfactant, on the aggregation behavior of 1% (w/v, 2.2 × 10(-3) M) poly(N-isopropylacrylamide) (PNIPAM) aqueous solutions was studied as a function of temperature. From turbidity, dynamic light scattering, viscosity, and fluorescence measurements, it was observed that (i) there is NaC-induced nanoscale aggregation of PNIPAM in its sol state and (ii) the lower critical solution temperature corresponding to sol-gel transition shifts to a lower temperature by about 2 °C.",

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AU - Kumar, Anitha C.

AU - Erothu, Harikrishna

AU - Bohidar, Himadri B.

AU - Mishra, Ashok K.

PY - 2011/12/3

Y1 - 2011/12/3

N2 - The effect of sodium cholate (NaC; concentration 1-16 mM), a biological surfactant, on the aggregation behavior of 1% (w/v, 2.2 × 10(-3) M) poly(N-isopropylacrylamide) (PNIPAM) aqueous solutions was studied as a function of temperature. From turbidity, dynamic light scattering, viscosity, and fluorescence measurements, it was observed that (i) there is NaC-induced nanoscale aggregation of PNIPAM in its sol state and (ii) the lower critical solution temperature corresponding to sol-gel transition shifts to a lower temperature by about 2 °C.

AB - The effect of sodium cholate (NaC; concentration 1-16 mM), a biological surfactant, on the aggregation behavior of 1% (w/v, 2.2 × 10(-3) M) poly(N-isopropylacrylamide) (PNIPAM) aqueous solutions was studied as a function of temperature. From turbidity, dynamic light scattering, viscosity, and fluorescence measurements, it was observed that (i) there is NaC-induced nanoscale aggregation of PNIPAM in its sol state and (ii) the lower critical solution temperature corresponding to sol-gel transition shifts to a lower temperature by about 2 °C.

KW - sodium cholate

KW - aggregation behavior

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UR - http://pubs.acs.org/doi/abs/10.1021/jp109056u

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JO - Journal of Physical Chemistry: Part B

JF - Journal of Physical Chemistry: Part B

IS - 3

ER -

Bile-salt-induced aggregation of poly(N-isopropylacrylamide) and lowering of the lower critical solution temperature in aqueous solutions

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