Encapsulation of solvent into halloysite nanotubes to promote self-healing ability in polymers

Melo, José Daniel Diniz; Barbosa, Ana Paula Cysne; Costa, Maria Carolina Burgos; Melo, Gudson Nicolau de

doi:10.1080/09243046.2014.915116

Cited by 16 publications

(8 citation statements)

References 31 publications

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“…Beyond halloysite, minerals as alunite (aluminum sulfate), quartz, kaolinite, and gibbsite [CaSO4.2H2O] were also found. As shown in Figure 2, natural halloysite shows a sharp peak at 2θ of 20.1°, which is the characteristic (1 1 0) peak of tubular halloysite (Bodeepong et al, 2011;Abdullayev et al, 2012;Zhang et al, 2012;Carrillo et al, 2014). No intercalation of sulfuric acid into interlayer space is observed, as the (0 0 1) reflection does not shift to lower angles.…”

Section: Thermogravimetric Measurementsmentioning

confidence: 90%

“…For temperatures higher than 400-450°C (slopes 3 and 4) another process is occurring and sums up to only 0.5% of mass loss. In the literature, transformations at temperatures beyond 450-600°C are assigned to dehydroxylation process during degradation of clays like halloysite or kaolinite (Yuan et al, 2008(Yuan et al, , 2013Frost et al, 2010;Bodeepong et al, 2011;Carrillo et al, 2014;Luo et al, 2014). So, slopes 3 and 4 can be attributed to the dehydroxylation of halloysite.…”

Section: Thermogravimetric Measurementsmentioning

confidence: 99%

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Dodecylamine-Loaded Halloysite Nanocontainers for Active Anticorrosion Coatings

Falcón

Sawczen²,

Aoki

2015

Front. Mater.

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Currently, the most promising approach in the corrosion protection of smart coatings is the use of nanoreservoirs loaded with corrosion inhibitors. Nanocontainers are filled with anti-corrosive agents and are embedded into a primer coating. Future prospective containers are halloysite nanotubes (HNTs) due to their low price, availability, durability, with high mechanical strength and biocompatibility. The aim of this work is to study the use of HNTs as nanocontainers for encapsulated dodecylamine for active corrosion protection of carbon steel. Halloysite clay was characterized by X-ray diffraction and TGA -thermogravimetric analysis techniques. HNTs were loaded with dodecylamine and were embedded into an alkyd primer with a weight ratio of 10 wt.%. The anti-corrosive performance of the alkyd primer doped with 10 wt.% of entrapped-dodecylamine halloysite was tested on coated carbon steel by direct exposure of the coated samples with a provoked defect into 0.01 mol/L NaCl corrosive media using electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET). EIS and SVET measurements showed the self-healing properties of the doped alkyd coating. Coated samples were also evaluated in a salt spray chamber and the self-healing effect was unequivocally noticed.

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Section: Thermogravimetric Measurementsmentioning

confidence: 90%

Section: Thermogravimetric Measurementsmentioning

confidence: 99%

Dodecylamine-Loaded Halloysite Nanocontainers for Active Anticorrosion Coatings

Falcón

Sawczen²,

Aoki

2015

Front. Mater.

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“…In addition to the self-healing of composites with carbon nanomaterials, self-healing of nanocomposites based on other nanomaterials such as silica nanoparticles [88], halloysite nanotubes (HNT) [89][90][91][92], gold nanoparticles [93], silver nanoparticles [94][95], and nanocellulose [40][41][42][43] have been also studied. Silica-polymers and core-shell nanoparticles based self-healing nanocomposites were prepared and studied in detail [88].…”

Section: Miscellaneous Self-healing Polymer Nanocompositesmentioning

confidence: 99%

Self-healing polymer nanocomposite materials: A review

Thakur

Kessler

2015

Polymer

595

295

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During the last few years, different kinds of autonomic and non-autonomic self-healing materials have been prepared using diverse techniques for a number of applications. The incorporation of suitable functionalities into these materials facilitates a healing mechanism that is triggered by damage/ rupture as well as various chemistries. This article presents a detailed study of the self-healing properties of different kinds of polymer nanocomposites utilizing a number of healing mechanisms, including the addition of several healing agents. The article will also provide an overview of different chemistries employed in the preparation of self-healing polymer nanocomposites, along with their advantages and disadvantages.

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“…Abdullayev and Lvov [74,75] reviewed the use of halloysite clay nanotubes for controlled release of protective agents for medical and pharmaceutical applications, anticorrosive and self-healing coatings etc. Melo et al [76] encapsulated solvents inside the halloysite lumen and they investigated the feasibility to use them for developing self-healing epoxy. After the insertion of the solvent (DMSO) inside HNT using vacuum infiltration, additional encapsulation using polyelectrolytes was done to block the ends of the HNT in order to trap the solvent inside the structure (Figure 8).…”

Section: Inorganic Nanomaterials As Self-healing Agent Containersmentioning

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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Encapsulation of solvent into halloysite nanotubes to promote self-healing ability in polymers

Cited by 16 publications

References 31 publications

Dodecylamine-Loaded Halloysite Nanocontainers for Active Anticorrosion Coatings

Dodecylamine-Loaded Halloysite Nanocontainers for Active Anticorrosion Coatings

Self-healing polymer nanocomposite materials: A review

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

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