Catechol grafted silica particles for enhanced adhesion to metal by coordinate bond
- Authors
- Lee, Jeongwook; Ko, Jaehyoung; Ryu, Jungju; Shin, Joohuei; Kim, Hyosin; Sohn, Daewon
- Issue Date
- Dec-2016
- Publisher
- ELSEVIER
- Keywords
- Surface modification; Silica particles; Catechol; Adhesion; Metal-catechol coordination
- Citation
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.511, pp.55 - 63
- Indexed
- SCIE
SCOPUS
- Journal Title
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
- Volume
- 511
- Start Page
- 55
- End Page
- 63
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/21364
- DOI
- 10.1016/j.colsurfa.2016.09.062
- ISSN
- 0927-7757
- Abstract
- Catechol-functionalized materials have been widely studied due to improved adhesion and metal-catechol coordination properties. In this study, silica particles, which are the base material in a multitude of applications, were modified with catechol groups based on a surface grafting reaction via amine- and carboxylic acid-functionalized silica particles. The chemical compositions of the modified particles were analyzed using Fourier transform infrared (FT-IR) and thermal gravimetric analysis (TGA). The surface properties of each particle were investigated using zeta potential, contact angle, and Brunauer–Emmett–Teller (BET) analysis. A series of characterizations verified successful modification with individual catecholic monomers of dopamine onto the silica surface. On the basis of the bioinspired surface modification, catechol-functionalized silica particles (SiO2single bondCA) exhibited outstanding adhesion properties with metals. The SiO2single bondCA showed enhanced Fe3+-capturing capacity that was five times that of bare silica particles. Furthermore, SiO2single bondCA exhibits outstanding adhesion on the TiO2-coated layer. The improved adhesion properties of SiO2single bondCA were due to high affinity and strong binding as a result of the metal-catechol coordination.
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