التفاصيل البيبلوغرافية
| العنوان: |
Density effects on collapse, compression, and adhesion of thermoresponsive polymer brushes. |
| المؤلفون: |
Malham IB; Institut des Nanosciences de Paris, UMR 7588 CNRS-Université Paris 6, 140 rue de Lourmel, 75015 Paris, France., Bureau L |
| المصدر: |
Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2010 Apr 06; Vol. 26 (7), pp. 4762-8. |
| نوع المنشور: |
Journal Article |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: American Chemical Society Country of Publication: United States NLM ID: 9882736 Publication Model: Print Cited Medium: Internet ISSN: 1520-5827 (Electronic) Linking ISSN: 07437463 NLM ISO Abbreviation: Langmuir Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: |
Original Publication: Washington, DC : American Chemical Society, c1985- |
| مستخلص: |
We probe, using the surface forces apparatus, the thermal response of poly(N-isopropylacrylamide) (PNIPAM) brushes of various grafting densities, grown from plasma-activated mica by means of surface-initiated polymerization. We thus show that dense thermoresponsive brushes collapse gradually as temperature is increased and that grafting density greatly affects their ability to swell: the swelling ratio of the brushes, which characterizes the thickness variation between the swollen and the collapsed state, is found to decrease from approximately 7 to approximately 3 as the number of grafted chains per unit area increases. Such a result, obtained with an unprecedented resolution in grafting density, provides qualitative support to calculations by Mendez et al. [Macromolecules 2005, 38, 174]. We further show that, in contrast to swelling, adhesion between two PNIPAM brushes appears to be rather insensitive to their molecular structure. |
| تواريخ الأحداث: |
Date Created: 20091208 Date Completed: 20100621 Latest Revision: 20100330 |
| رمز التحديث: |
20240628 |
| DOI: |
10.1021/la9035387 |
| PMID: |
19961208 |
| قاعدة البيانات: |
MEDLINE |
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