Surface-engineered Microcapsules by Layer-by-layer Assembling for Entrapment of Corrosion Inhibitor

doi:10.1016/j.jmst.2014.10.008

J. Mater. Sci. Technol. ›› 2015, Vol. 31 ›› Issue (5): 512-516.DOI: 10.1016/j.jmst.2014.10.008

• Orginal Article • Previous Articles Next Articles

Surface-engineered Microcapsules by Layer-by-layer Assembling for Entrapment of Corrosion Inhibitor

Hongwei Shi^*, Fuchun Liu, En-Hou Han

Environmental Corrosion Center, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:2014-03-21 Online:2015-05-20 Published:2015-07-23
Contact: Corresponding author. Ph.D.; Tel.: +86 24 23915897; Fax: +86 24 23894149. E-mail address: hwshi@imr.ac.cn (H. Shi).
Supported by:
This work was financially supported by the National Natural Science Foundation of China (Grant No. 51001109).

Abstract

Abstract: Microcapsules containing core materials are promising component for developing self-healing coatings. In the present work, urea-formaldehyde capsule containing core material with size of micrometer was prepared by in-situ encapsulation method. The morphology of the microcapsules was characterized by scanning electron microscopy. A corrosion inhibitor, benzotriazole, was successfully loaded on the outside of microcapsules by layer-by-layer assembling using polyelectrolytes. Thus, the modified microcapsules are promising to provide healing ability combined by release of interior core material and exterior corrosion inhibitor.

Key words: Microcapsule, Corrosion inhibitor, Fourier transform infrared (FT-IR) analysis, Self-assembling

Hongwei Shi, Fuchun Liu, En-Hou Han. Surface-engineered Microcapsules by Layer-by-layer Assembling for Entrapment of Corrosion Inhibitor[J]. J. Mater. Sci. Technol., 2015, 31(5): 512-516.

Figures/Tables 6

SEM images of (a) Tung oil-filled capsules

(b) hollow capsules

and (c) Tung oil-filled capsules loaded with PEI/PSS/benzotriazole/PSS/PEI multilayers.

SEM image of a ruptured microcapsule with leaked Tung oil (obtained by polishing an epoxy sample incorporated with microcapsules).

FT-IR results of (a) Tung oil

(b) capsules containing Tung oil

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Surface-engineered Microcapsules by Layer-by-layer Assembling for Entrapment of Corrosion Inhibitor

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