دورية أكاديمية
Surface friction of hydrogels with well-defined polyelectrolyte brushes.
| العنوان: | Surface friction of hydrogels with well-defined polyelectrolyte brushes. |
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| المؤلفون: | Ohsedo Y; Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan., Takashina R, Gong JP, Osada Y |
| المصدر: | Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2004 Aug 03; Vol. 20 (16), pp. 6549-55. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Chemical Society Country of Publication: United States NLM ID: 9882736 Publication Model: Print Cited Medium: Print ISSN: 0743-7463 (Print) Linking ISSN: 07437463 NLM ISO Abbreviation: Langmuir Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Washington, DC : American Chemical Society, c1985- |
| مواضيع طبية MeSH: | Electrolytes/*chemistry , Hydrogels/*chemistry , Polyhydroxyethyl Methacrylate/*chemistry , Polymers/*chemistry , Sulfonic Acids/*chemistry, Friction ; Hydrogels/chemical synthesis ; Molecular Structure ; Molecular Weight ; Surface Properties ; Water/chemistry |
| مستخلص: | Hydrogels of poly(2-hydroxyethyl methacrylate) (PHEMA) with well-defined polyelectrolyte brushes of poly(sodium 4-styrenesulfonate) (PNaSS) of various molecular weights were synthesized, keeping the distance between the polymer brushes constant at ca. 20 nm. The effect of polyelectrolyte brush length on the sliding friction against a glass plate, an electrorepulsive solid substrate, was investigated in water in a velocity range of 7.5 x 10(-5) to 7.5 x 10(-2) m/s. It is found that the presence of polymer brush can dramatically reduce the friction when the polymer brushes are short. With an increase in the length of the polymer brush, this drag reduction effect only works at a low sliding velocity, and the gel with long polymer brushes even shows a higher friction than that of a normal network gel at a high sliding velocity. The strong polymer length and sliding velocity dependence indicate a dynamic mechanism of the polymer brush effect. |
| المشرفين على المادة: | 0 (Electrolytes) 0 (Hydrogels) 0 (Polymers) 0 (Sulfonic Acids) 059QF0KO0R (Water) 25249-16-5 (Polyhydroxyethyl Methacrylate) ZSL2FB6GXN (styrenesulfonic acid polymer) |
| تواريخ الأحداث: | Date Created: 20040728 Date Completed: 20060522 Latest Revision: 20161124 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1021/la036211+ |
| PMID: | 15274553 |
| قاعدة البيانات: | MEDLINE |
Find this issue from the American Chemical Society | تدمد: | 0743-7463 |
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| DOI: | 10.1021/la036211+ |