کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5187803 | 1381138 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Colloidal gel from amphiphilic heteroarm polyelectrolyte stars in aqueous media
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
We report on the gelation capability of polystyrene/poly(2-vinyl pyridine) amphiphilic heteroarm polyelectrolyte stars in acidic salt-free aqueous media. The star polymers associate through hydrophobic interactions, by retraction of the stretched arms under no interdigitation conditions, in the dilute regime forming colloidal soft nanoparticles comprising about 6 stars, At concentrations significantly higher than the hydrodynamic overlap concentration (c > 40câ), the crowding of the colloidal nanoparticles drives a jamming transition, leading to a colloidal gel. The intermediate overlap regime (câ < c < 40câ) is characterized by a significant compaction of the polyelectrolyte entities prior interdigitation and jamming.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 50, Issue 14, 3 July 2009, Pages 3204-3210
Journal: Polymer - Volume 50, Issue 14, 3 July 2009, Pages 3204-3210
نویسندگان
Apostolos Kyriazis, Thierry Aubry, Walther Burchard, Constantinos Tsitsilianis,