کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
596470 879521 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Functional group interactions of adsorbed small charged bolaform molecules and their effects on intermolecular and surface forces in dispersions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Functional group interactions of adsorbed small charged bolaform molecules and their effects on intermolecular and surface forces in dispersions
چکیده انگلیسی

This study illustrates how polar functional groups adjacent to bolaform charged groups modified the interaction behaviour of the compound with an oppositely charged surface. Adsorbed fumaric (trans-1,2-ethylene dicarboxylic) acid bridges particles in dispersions. However the presence of hydroxyl group adjacent to the two bolaform carboxylic groups depresses this particle bridging behaviour. Instead dihydroxyfumaric acid adsorbed to form a steric barrier. Molecular modelling shows that each of the two hydroxyl groups in dihydroxyfumate formed a hydrogen bond with the same carboxylic acid group leaving the other fully charged and free to adsorb onto a particle. In contrast, the presence of a methyl group adjacent to a bolaform carboxylic acid group did not affect the particle bridging attribute of the compound and this behaviour was displayed by adsorbed mesaconic or 2-methylfumaric acid.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 325, Issue 3, 1 August 2008, Pages 127–131
نویسندگان
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