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Electrophoretic deposition of chitosan
Simchi, A ; Sharif University of Technology | 2009
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- Type of Document: Article
- DOI: 10.1016/j.matlet.2009.07.046
- Publisher: 2009
- Abstract:
- The electrophoretic deposition (EPD) of chitosan on metallic substrates was investigated. The electrophoretic mobility of the natural biopolymer in aqueous solution as a function of pH was studied. Because the protonation/deporotonation of chitosan is pH-dependent, the electrophoretic mobility and deposition rate is shown to increase with increasing pH from 2.9 to 4.1. The film growth rate is estimated to vary in the range 0.02-0.08 μm/s depending on the pH value. At high growth rates (> 0.05 μm/s), a porous film is obtained due to hydrogen entrapment. The EPD method developed here is applicable for the surface modification of metal implants by chitosan to develop novel bioactive coatings. © 2009 Elsevier B.V. All rights reserved
- Keywords:
- Biomaterials ; Deposition ; Kinetics ; Aqueous solutions ; Bioactive coatings ; Charge mobility ; Electrophoretic depositions ; High growth rate ; Metal implants ; Metallic substrate ; Natural biopolymers ; pH value ; PH-dependent ; Porous film ; Surface modification ; Atomic layer deposition ; Biological materials ; Chitin ; Chitosan ; Film growth ; Hydrogen ; Electrophoretic mobility
- Source: Materials Letters ; Volume 63, Issue 26 , 2009 , Pages 2253-2256 ; 0167577X (ISSN)
- URL: https://www.sciencedirect.com/science/article/abs/pii/S0167577X09005667