Application of ordered mesoporous silica nanocontainers in an anticorrosive epoxy coating on a magnesium alloy surface

Qiao, Yingjie; Li, Wenpeng; Wang, Guixiang; Zhang, Xiaohong; Cao, Nana

doi:10.1039/c5ra05266a

Cited by 40 publications

(19 citation statements)

References 38 publications

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“…The loading of healing agents inside small diameters are getting much attention these days. Porous or tubular forms of inorganic particles such as mesoporous silica [20,21], TiO 2 nanotube [22], hollow TiO 2 spheres [23], hollow porous Mn 2 O 3 microsphere [24] etc. are used as reservoirs for corrosion inhibitors or healing agents.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on long term stability of self-healing epoxy coating with different inorganic nanotubes as healing agent reservoirs

Vijayan¹,

Elgawady²,

Al-Maadeed³

2017

Express Polym. Lett.

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Abstract. Self-healing epoxy coatings were prepared with different nanotubes as reservoirs for epoxy monomer (healing agent). The nanotubes selected for the current study were TiO 2 nanotubes with two different tube diameter (TNT1 and TNT2) and naturally occurring hallyosite nanotubes (HNT). These self-healing coatings were subjected to accelerated weathering exposure. The weathering stability of the coatings were observed. The surface morphology, chemical changes and surface roughness were studied as a function of weathering exposure period. These studies confirmed that the long term stability of the coatings highly depend on the nanotube parameters such as nature, surface area and diameter. It was found that the photocatalytic degradation of epoxy matrix with TiO 2 nanotubes was prominent in TNT1 filled coating compared with their TNT2 variant. The higher possibility of exposure of epoxy monomer encapsulated inside both HNT and TNT2 facilitated the cure reaction with UV light to create new chains during weathering.

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Section: Introductionmentioning

confidence: 99%

A comparative study on long term stability of self-healing epoxy coating with different inorganic nanotubes as healing agent reservoirs

Vijayan¹,

Elgawady²,

Al-Maadeed³

2017

Express Polym. Lett.

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“…This facilitated prolonged self-healing for long time in corrosive media. Epoxy coatings containing corrosion inhibitor (MBT) loaded mesoporous silica was proved to have selfhealing properties [81]. It was showed that epoxy coating with 4 wt% MBT loaded mesoporous silica had partial recovery from artificially created defects as shown by it response to EIS analysis when exposed to 3.5 wt% NaCl solution.…”

Section: Inorganic Nanomaterials As Self-healing Agent Containersmentioning

confidence: 99%

“…The longest diffusion distance from their carriers is also critically influence the self-healing Figure 9. Electrochemical impedance spectroscopy bode plots of epoxy-4 wt% silica-MBT coating after artificial defect exposure to 0.1 mol·L -1 NaCl solution [81] process in the two-part system. With a shorter diffusion distance at higher concentrations and efficient mixing lead to an improved healing performance.…”

Section: Combination Of Containers For Self-healing Epoxy Composites mentioning

confidence: 99%

‘Containers’ for self-healing epoxy composites and coating: Trends and advances

Vijayan¹,

Al-Maadeed²

2016

Express Polym. Lett.

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Abstract.The introduction of self-healing functionality into epoxy matrix is an important and challenging topic. Various micro/nano containers loaded self-healing agents are developed and incorporated into epoxy matrix to impart self-healing ability. The current report reviews the major findings in the area of self-healing epoxy composites and coatings with special emphasis on these containers. The preparation and use of polymer micro/nano capsules, polymer fibers, hollow glass fibers/bubbles, inorganic nanotubes, inorganic meso-and nano-porous materials, carbon nanotubes etc. as self-healing containers are outlined. The nature of the container and its response to the external stimulations greatly influence the self-healing performance. The self-healing mechanism associated with each type of container and the role of container parameters on self-healing performance of self-healing epoxy systems are reviewed. Comparison of the efficiency offered by different types of containers is introduced. Finally, the selection of containers to develop cost effective and green self-healing systems are mentioned.

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“…Different types of micro- or nano-containers are used for the storage and release of corrosion inhibitors or self-healing agents, depending on if the specific corrosion triggering conditions are dependent upon chemical changes (e.g., on pH change) or upon mechanical damage6. Corrosion inhibitors or healing agents are usually immobilized or encapsulated inside polymeric micro capsules78910 and inorganic meso- and nano-porous materials2111213.…”

mentioning

confidence: 99%

“…Additionally, the use of inorganic nanomaterials as reservoirs for healing agents can eliminate the tedious encapsulation process. Previously, inorganic particles such as cerium molybdate15, mesoporous silica1316, hollow titanium dioxide spheres2, cerium titanium oxide17, etc., were reported as containers for corrosion inhibitors to provide self-healing protective coatings for metals. Fibrous and tube shaped materials including cellulose nanofibers1819, clay nanotubes202122, etc., have also been reported as effective containers for corrosion inhibitors.…”

mentioning

confidence: 99%

TiO2 nanotubes and mesoporous silica as containers in self-healing epoxy coatings

Al-Maadeed

2016

Sci Rep

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The potential of inorganic nanomaterials as reservoirs for healing agents is presented here. Mesoporous silica (SBA-15) and TiO2 nanotubes (TNTs) were synthesized. Both epoxy-encapsulated TiO2 nanotubes and amine-immobilized mesoporous silica were incorporated into epoxy and subsequently coated on a carbon steel substrate. The encapsulated TiO2 nanotubes was quantitatively estimated using a ‘dead pore ratio’ calculation. The morphology of the composite coating was studied in detail using transmission electron microscopic (TEM) analysis. The self-healing ability of the coating was monitored using electrochemical impedance spectroscopy (EIS); the coating recovered 57% of its anticorrosive property in 5 days. The self-healing of the scratch on the coating was monitored using Scanning Electron Microscopy (SEM). The results confirmed that the epoxy pre-polymer was slowly released into the crack. The released epoxy pre-polymer came into contact with the amine immobilized in mesoporous silica and cross-linked to heal the scratch.

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Application of ordered mesoporous silica nanocontainers in an anticorrosive epoxy coating on a magnesium alloy surface

Abstract: Epoxy coatings containing inhibitor loaded silica nanocontainers were applied to Mg alloy. When damage was caused in coatings during immersion time, the coatings displayed self-healing property with the release of inhibitor from nanocontainers.

Cited by 40 publications

References 38 publications

A comparative study on long term stability of self-healing epoxy coating with different inorganic nanotubes as healing agent reservoirs

A comparative study on long term stability of self-healing epoxy coating with different inorganic nanotubes as healing agent reservoirs

‘Containers’ for self-healing epoxy composites and coating: Trends and advances

TiO2 nanotubes and mesoporous silica as containers in self-healing epoxy coatings

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