Particle morphology dependent superhydrophobicity in treated diatomaceous earth/polystyrene coatings

Sedai, Bhishma R.; Alavi, S. Habib; Harimkar, Sandip P.; McCollum, M. J.; Donoghue, Joseph F.; Blum, Frank D.

doi:10.1016/j.apsusc.2017.04.207

Cited by 15 publications

(6 citation statements)

References 51 publications

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“…Toluene (15 ml) was added to wet the DE followed by the addition of 1% p-toluenesulfonic acid relative to the DE mass. 7 Varying amounts of (0.1-1 ml) unreacted C16AS were added to the samples and heated for 4 h at 50 C. 4 Treated DE was washed with hexane twice to remove unreacted C16AS. Samples were air-dried overnight.…”

Section: Methodsmentioning

confidence: 99%

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Enhancement of hydrophobicity of natural rubber latex films using diatomaceous earth

Ambegoda

Egodage

Blum

et al. 2020

J of Applied Polymer Sci

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Enhancement of the hydrophobic nature of natural rubber latex (NRL) films will open up a wide range of applications for them. Incorporating hexadecyltrimethoxysilane treated superhydrophobic diatomaceous earth (DE) in NRL, resulted in films with increased hydrophobicity. The nano‐scale surface roughness for the superhydrophobic surface was provided by DE and low surface energy was achieved by treating DE with hexadecyltrimethoxysilane (treated DE). Surface wettability and morphology were analyzed by water contact angle (WCA) measurements and scanning electron microscopic analysis, respectively. About 38% wt/wt hexadecyltrimethoxysilane to DE ratio could make superhydrophobic DE with WCAs larger than 150°. A dispersion of treated DE was incorporated into NRL resulting in hydrophobic NRL films possessing WCAs greater than 110° with 41% treated DE particle loading. The resulting NRL films were harder and had smaller tensile strength compared to normal NRL film.

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Section: Methodsmentioning

confidence: 99%

“…The most common exoskeleton shapes are rods, disks, feathers, ladders, needles, and spheres. 7 DE is a hydrophilic material that can absorb water. DE surfaces contain hydroxyl groups, primarily silanols, which can react with other compounds, including hydrolyzed forms of alkylsilanes to make DE surfaces with low surface energies.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of hydrophobicity of natural rubber latex films using diatomaceous earth

Ambegoda

Egodage

Blum

et al. 2020

J of Applied Polymer Sci

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“…Once a minimum loading amount of diatomaceous earth treated with HFIP‐TMS exceeded a threshold of ≈40% on the polymer coating, the contact angles of the coatings were independent of the polymer system in use. To be noted is that the minimum amount of silane coupling agent, such as HFIP‐TMS, required to induce superhydrophobicity of the diatomaceous earth particles was a function of particle morphology . Therefore, the minimum loading amount of diatomaceous earth treated with HFIP‐TMS inducing superhydrophobicity in polymer coatings might vary, as different amounts of fluorosilanes covers the pores and hence decreases the surface area of the particles .…”

Section: Diatoms and Their Applications In Diagnostics And Therapeuticsmentioning

confidence: 99%

Therapeutic Applications of Phytoplankton, with an Emphasis on Diatoms and Coccolithophores

Lomora

Shumate

Rahman

et al. 2018

Advanced Therapeutics

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Phytoplankton are complex living organisms that have attracted significant interest in the field of biomedicine. One subclass of phytoplankton, the diatoms, produce elegant self-assembled siliceous architectural features with a complex 3D porous structure. Diatoms are characterized by a distinct 3D architecture of silica cell walls called frustules with a highly ordered nano-/micropore structure and pattern. Another phytoplankton subclass of interest is the coccolithophore, which produces unique calcium carbonate plates with distinct architectural features called coccoliths. The unique morphological characteristics of coccoliths resembling the shape of a wagon wheel allows a higher surface area, thus an increased amount of immobilized therapeutic agent on their surface compared to a synthetic calcium carbonate microparticle. This review offers a summary of phytoplankton (microalgae) and their potential for application in drug delivery, diagnostics, drug discovery, as molecular factories, and as scaffolds for various therapeutic applications.

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“…Diatomite is the biological sedimentary rock of the remains of silica algae. The composition of diatomite is mainly SiO2 [4]. The porous nature makes it suitable for materials such as insulation, sound insulation and heat resistance [5][6]; and diatomite has excellent adsorption capacity, which enables it to adsorb solution or filter impurities in liquid [7][8].…”

Section: Introductionmentioning

confidence: 99%

Study on Reuse of Wasted Diatomite from Brewing Industry for Building Materials

Shih

Hou

Kotharangannagari

2020

KEM

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In order to solve environmental problems and reduce the cost of building materials, this study used waste diatomite from brewing industry to develop novel cement mortar and compared it with pristine one. After pretreatment with water, soaking, drying, it is shown in the microscope that the treated diatomite has recovered its porosity. The thermogravimetric analysis also showed that the purity of treated diatomite was greater than 93%, confirming that most of the originally adsorbed organic matter was removed. Further, the diatomite after the treatment was used to prepare a novel cement mortar, and it was found that the optimum compressive strength was obtained when the water-cement ratio was 0.65 and the amount of diatomite added was 20%. It was found that the average compressive strength after 28 days was 284.03 kg/cm2, which was 81.22 kg/cm2 higher than that of the pristine cement mortar. It is proved that the addition of diatomite can increase the strength of the cement mortar and effectively reuse the waste diatomite.

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Particle morphology dependent superhydrophobicity in treated diatomaceous earth/polystyrene coatings

Cited by 15 publications

References 51 publications

Enhancement of hydrophobicity of natural rubber latex films using diatomaceous earth

Enhancement of hydrophobicity of natural rubber latex films using diatomaceous earth

Therapeutic Applications of Phytoplankton, with an Emphasis on Diatoms and Coccolithophores

Study on Reuse of Wasted Diatomite from Brewing Industry for Building Materials

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