کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1555509 999053 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrostatic control of nanoscale phase behavior of polyelectrolyte networks
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد شیمی مواد
پیش نمایش صفحه اول مقاله
Electrostatic control of nanoscale phase behavior of polyelectrolyte networks
چکیده انگلیسی

Polyelectrolyte gels are intelligent materials that undergo large reversible volume changes for a range of environmental stimuli. Although the strength of electrostatic interactions have a strong influence on the gel response, these interactions are not properly accounted in the classical mean-field theories that assume a homogeneous charge-neutral gel. Using Poisson–Boltzmann theory and theoretically informed coarse-grained simulations, we emphasize the importance of charge inhomogeneities and the associated Coulomb interactions in determining the response of gels. Our analysis reveals that nanometer-sized gels, collapsed gels, and gels in media with low salinity or high dielectric constant, have large regions of excess charge. We also observe that the addition of salt can induce collapse in swollen gels by compensating the polymer charge.


► Charge and density heterogeneities in polyelectrolyte networks.
► Poisson–Boltzmann theory of polyelectrolyte gels.
► Swelling–Collapse behavior of ionic nanogels by theoretically informed coarse-grained simulations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Opinion in Solid State and Materials Science - Volume 15, Issue 6, December 2011, Pages 271–276
نویسندگان
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