Exceptionally robust and conductive superhydrophobic free-standing films of mesoporous carbon nanocapsule/polymer composite for multifunctional applications

Mittal, Nitesh; Deva, Dinesh; Kumar, Rudra; Sharma, Ashutosh

doi:10.1016/j.carbon.2015.05.086

Cited by 37 publications

(27 citation statements)

References 29 publications

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“…From the presence of low surface energy related fluoride functional groups post this thermal treatment, it is inferred that superhydrophobic nature of the coated surface is retained up to 350 °C (CA = 160.1 ± 2.3°, SA = 5.8 ± 0.8°). This observation is similar to thermal stability of conductive superhydrophobic MCC/polymer composite‐based FSF reported by us earlier, where the stability of hierarchical roughness at different temperatures have also been discussed, as maintaining the hierarchical roughness is a necessity along with the low surface energy to obtain the superhydrophobic behavior …”

Section: Resultssupporting

confidence: 90%

“…We also examined the influence of corrosive environment on the superhydrophobicity as well as on the conductive behavior of the as prepared MCC‐based superhydrophobic coating over a wide pH range of 1.29–13.54. The methods used were the same as used for the MCC/polymer composite‐based FSF . It has been found that both the superhydrophobicity and conductivity of the prepared MCC‐based coatings are sustained over a wide pH range are thus are immune to highly corrosive environment (see Supporting Information S4 for details).…”

Section: Resultsmentioning

confidence: 99%

“…Fabrication of Mesoporous Carbon Capsules : Sub‐micrometer‐sized solid core/mesoporous shell carbon capsules were prepared by similar protocol as reported by Mittal et al…”

Section: Methodsmentioning

confidence: 99%

“…Instead, to prepare conductive superhydrophobic surfaces, carbon‐based nano materials like carbon nanotubes, carbon black, and graphene have been used for creating hierarchical nano/micro structure. We recently reported a mesoporous carbon capsule (MCC)/polymer‐based multifunctional conductive superhydrophobic free‐standing film (FSF) of high thermal and mechanical stability that also exhibited excellent corrosion resistive properties …”

Section: Introductionmentioning

confidence: 99%

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Mesoporous Carbon Nanocapsules Based Coatings with Multifunctionalities

Mittal

Kumar

Mishra

et al. 2016

Adv Materials Inter

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(1 of 8) 1500708wileyonlinelibrary.com and in electronic circuits and devices. [ 11 ] Conductive superhydrophobic surfaces can eliminate the drawback of static charge accumulation that can otherwise be a fi re hazard in the case of insulating surfaces. [ 11 ] The functionality of anti bio-fouling of engineering surfaces that can resist bacterial colonization and biofi lm formation are of importance as potential bio-interfaces in a wide range of applications including medical implants and non-bioadhesive wound dressings. [ 12 ] For practical applications of such superhydrophobic surfaces, mechanical robustness and stability both thermal and chemical are desirable and these still remain challenging goals with facile and scalable methods of their fabrication. Besides, by achieving universal applicability to substrates regardless of their surface morphology, geometry, and chemical nature may further enhance value to such coatings.In general, the formation of superhydrophobic surfaces is a two-step process; fi rst step is to create a hierarchical roughness by micro/nanostructures followed by deposition of a low surface energy material over the created rough surface, in the next step. [ 5 ] The desired roughness can be achieved by various methods such as by etching-laser or chemical, lithography, biomemetic template, and stamping processes or through chemical deposition methods such as sol-gel or by a sol prepared by dispersing nanoparticles in a matrix of hydrophobic polymer. [ 13,14 ] Whereas, low surface energy for the roughened surface is achieved usually by an over-laid nano thick layer of materials such as fl uoro carbon compounds. [ 15,16 ] For obtaining the desired nano/micro structure as well as the top low energy surface, the chemical deposition methods are favored on account of their simplicity as well the potential to be scalable. A widely practiced approach for the fabrication of multiscale hierarchical structure for superhydrophobic surfaces by chemical means is through the deposition of silica nanoparticles synthesized with the Stoeber process. [15][16][17][18] To obtain multifunctionality for the superhydrophobic surfaces, rather than solid silica spheres, mesoporous porous silica spheres and capsules have been used that potentially can also provide a platform to encapsulate functional materials to achieve tunable properties. [ 19 ] However, conductivity is still not present in superhydrophobic surfaces based on silica nanoparticle or mesoporous silica. Instead, to prepare conductive superhydrophobic surfaces, carbon-based nano materials like carbon nanotubes, carbon black, and graphene have been used for creating hierarchical nano/micro structure.Multifunctional superhydrophobic coatings are fabricated based on mesoporous carbon nanocapsules (MCC) with polyvinylidene fl uoride (PVDF) as a binder through a facile brush-on process. The hierarchical micro/nano structures for the coatings are optimized by the relative amount of MCC and hydrophobic PVDF polymer binder. Integration of low surface energy of p...

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

“…Fabrication of Mesoporous Carbon Capsules : Sub‐micrometer‐sized solid core/mesoporous shell carbon capsules were prepared by similar protocol as reported by Mittal et al…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mesoporous Carbon Nanocapsules Based Coatings with Multifunctionalities

Mittal

Kumar

Mishra

et al. 2016

Adv Materials Inter

Self Cite

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“…Mittal et al . reported about super hydrophobic film with poly(vinylidene fluoride) (PVDF) and mesoporous carbon nanocapsule . Kierys et al .…”

Section: Introductionmentioning

confidence: 99%

Preparation of polycarbonate/poly(acrylonitrile‐butadiene‐styrene)/mesoporous silica nanocomposite films and its rheological, mechanical, and sound absorption properties

Sim

Kwon

Ahn

et al. 2017

J of Applied Polymer Sci

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The homogeneous polycarbonate/poly(acrylonitrile-butadiene-styrene) (PC/ABS) nanocomposite thin films were prepared by a facile solvent casting method using phenylene modified-mesoporous silica materials as additives and dichloromethane as a solvent. The physicochemical analyses using small-angle X-ray scattering, nitrogen adsorption-desorption, solid-state 13 C and 29 Si nuclear magnetic resonance, and scanning electron microscope were investigated to provide clear physical and chemical properties for modified-mesoporous materials and nanocomposite films. Tensile tests were performed at room temperature according to ASTM D638. Rheological properties were also analyzed to observe any variance of solid-liquid property. As a compatibilizer and a reinforcing filler, mesoporous (organo-)silicas showed enhanced features in rheological and mechanical properties. The sound absorption coefficient was measured by the impedance tube up to 6400 Hz according to ISO 10534-2. It was found that the PC/ABS nanocomposites containing mesoporous materials can be used as a sound-proofing support material depending on fabrication process.

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Silica aerogels; a review of synthesis, applications and fabrication of hybrid composites

2021

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Silica aerogels are gaining significant importance and have attracted considerable interest due to their extraordinary properties and numerous applications. Silica aerogels are highly porous with high surface area and very low density and thermal conductivity. Usually they are prepared and synthesized via sol-gel technique, which involves making a sol containing a precursor, a solvent and a catalyst. The properties possessed by the final product depend upon numerous factors such as ratio of precursor to solvent and the drying method employed. Due to the flexibility of synthesis methods and the production of aerogels with tailored properties, silica aerogels have found numerous commercial applications and are being investigated of their suitability in several areas, such biomedical and aerospace engineering. Despite having exceptional properties, silica aerogels come with drawbacks such as brittleness and low mechanical strength, which can be resolved by fabricating composites extending the potential applications. This paper reviews the synthesis of silica aerogels via sol-gel technique, and the applications where this extraordinary material has shown promising results. The different materials used for the fabrication of composites to improve and enhance the physical and chemical properties of silica aerogels are also presented.

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Exceptionally robust and conductive superhydrophobic free-standing films of mesoporous carbon nanocapsule/polymer composite for multifunctional applications

Cited by 37 publications

References 29 publications

Mesoporous Carbon Nanocapsules Based Coatings with Multifunctionalities

Mesoporous Carbon Nanocapsules Based Coatings with Multifunctionalities

Preparation of polycarbonate/poly(acrylonitrile‐butadiene‐styrene)/mesoporous silica nanocomposite films and its rheological, mechanical, and sound absorption properties

Silica aerogels; a review of synthesis, applications and fabrication of hybrid composites

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