کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4983627 1454362 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interaction forces and lubrication of dendronized surfaces
ترجمه فارسی عنوان
نیروهای تعامل و روانکاری سطوح دندونیزه شده
کلمات کلیدی
روانکاری و پوشیدن، تعامل پلیمری با قلم مو، برس دندرن، طول تعامل، قلم مو کلسترول، تقریب کشش قوی، نظریه میدان خودمختلف،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


- Insights in lubrication, wear and colloidal stability are key for sustainable systems.
- The polymer brushes motive enables tunable mechanical properties.
- Dendron brushes feature lower friction compared to traditional brushes.
- Theory and computer simulations show directions for experiments and synthesis.

Dendron brushes provide excellent opportunities to tune mechanical properties of interfacial layers. Compared to linear brushes the dendronic version is more compact and thus gives more steep repulsive barriers upon brush overlap. Provided that the range is sufficient to overcome the Van der Waals forces, the many free ends may be used to functionalize the colloidal particles for 'smart' delivery applications. Brushes show little interpenetration upon lateral compression and therefore brushed surfaces feature low friction coefficients. Dendron brushes have comparatively lower interpenetration lengths and hence are expected to protect surfaces even better against wear. We argue that one can still improve on this: when the free ends of star-like or dendronic molecules are (chemically) linked to each other to form a brush with a peripheral layer of macrocycles, the interpenetration length is even less. The latter is shown to be the case in recent computer simulations and is reproduced here using the numerical self-consistent field method. We conclude that the role of branching of molecules, possibly in combination with charges in the brush, should be further investigated to come to a deeper understanding of lubrication and wear protection in aqueous media. The recent progress that is reviewed below has a small bias to theoretical developments. It contains solid stepping stones for more systematic experimental verifications and detailed computer simulations.

Graphical Abstract293

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Opinion in Colloid & Interface Science - Volume 27, February 2017, Pages 50-56
نویسندگان
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