Catechol grafted silica particles for enhanced adhesion to metal by coordinate bond

Jeongwook Lee, Jaehyoung Ko, Jungju Ryu, Joohuei Shin, Hyosin Kim, Daewon Sohn

Research output: Contribution to journalArticle

4 Citations (Scopus)

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 (SiO2[sbnd]CA) exhibited outstanding adhesion properties with metals. The SiO2[sbnd]CA showed enhanced Fe3+-capturing capacity that was five times that of bare silica particles. Furthermore, SiO2[sbnd]CA exhibits outstanding adhesion on the TiO2-coated layer. The improved adhesion properties of SiO2[sbnd]CA were due to high affinity and strong binding as a result of the metal-catechol coordination.

Original languageEnglish
Pages (from-to)55-63
Number of pages9
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume511
DOIs
StatePublished - 2016 Dec 20

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Silicon Dioxide
Adhesion
Metals
Silica
Gravimetric analysis
Zeta potential
Carboxylic Acids
Carboxylic acids
Contact angle
Amines
Surface properties
Surface treatment
Dopamine
Fourier transforms
Monomers
catechol
Infrared radiation
Chemical analysis

Keywords

  • Adhesion
  • Catechol
  • Metal-catechol coordination
  • Silica particles
  • Surface modification

Cite this

Lee, Jeongwook ; Ko, Jaehyoung ; Ryu, Jungju ; Shin, Joohuei ; Kim, Hyosin ; Sohn, Daewon. / Catechol grafted silica particles for enhanced adhesion to metal by coordinate bond. In: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2016 ; Vol. 511. pp. 55-63.
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Catechol grafted silica particles for enhanced adhesion to metal by coordinate bond. / Lee, Jeongwook; Ko, Jaehyoung; Ryu, Jungju; Shin, Joohuei; Kim, Hyosin; Sohn, Daewon.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 511, 20.12.2016, p. 55-63.

Research output: Contribution to journalArticle

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