Synthesis of Super Hydrophobic Clay by Solution Intercalation Method from Aqueous Dispersions

Açıkyıldız, Metin; Gürses, Ahmet; Yolcu, Hacı Hasan

doi:10.12693/aphyspola.127.1156

Cited by 9 publications

(7 citation statements)

References 34 publications

(24 reference statements)

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“…The natural clays (Figure 8‐1) show hydrophilic surfaces with large wettability by water, similar to silicon oxide 68 . After treatment with CTAB, the contact angle changes from 0° to 55–57° (Figures 8‐1(b), (c)), showing a substantial hydrophilicity decrease 69 …”

Section: Resultsmentioning

confidence: 98%

Biodegradable PLA based nanocomposites for packaging applications: The effects of organo‐modified bentonite concentration

Lima

Middea

Marconcini

et al. 2021

J of Applied Polymer Sci

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The effects of concentration and surface modification of two Brazilian bentonite clays on nanocomposites' properties based on polylactic acid – (PLA) were investigated. The samples were prepared by the extrusion/injection method to obtain biodegradable packaging plastics. The raw materials and their bionanocomposites were characterized by various techniques. Natural clay samples presented a size of around 2 μm while the modified ones' size was 5–6 μm, probably due to the presence of cetyltrimethylammonium bromide in the interlayer space. The particle size and the contact angle increased with the treatment and the clay's density decreased. The organoclays were homogeneously dispersed in PLA, which can be associated with the interactions between PLA chains' carbonyl groups and the organoclays. The bionanocomposites present modified clay particles axis aligned to the flow direction of the extruder/injector. Chocolate organoclay acts as a nucleating agent to PLA crystal growth, increasing the sample's crystallinity, while Bofe organoclay interferes with the amorphous chain's mobility and diminishes the sample's crystallization. The addition of both organoclays to PLA diminished the sample's elongation at break and strength, although the organoclays increased the sample's Young modulus, even though Bofe organoclay is more active in PLA amorphous phase and Chocolate organoclay on the crystalline one.

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Section: Resultsmentioning

confidence: 98%

Biodegradable PLA based nanocomposites for packaging applications: The effects of organo‐modified bentonite concentration

Lima

Middea

Marconcini

et al. 2021

J of Applied Polymer Sci

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“…where p 1 and p 2 are the pressures on the high pressure and low pressure sides of the coating, l is the coating thickness, A is the coating area, and q t is the volumetric flow rate. Considering the ability of the cation exchange capacity of clay minerals, Acikyildiz et al 151 used the solution intercalation method to diffuse CTA + ions of cetyltrimethylammonium bromide (CTAB) into the interlayer of clay mineral in the dispersion of a long-chain hydrocarbon solution. It was noted that the static contact angle of organoclay gradually increased the amount of hydrocarbon.…”

Section: Materials Used For Synthesis Of Superhydrophobic Surfacesmentioning

confidence: 99%

“…Considering the ability of the cation exchange capacity of clay minerals, Acikyildiz et al used the solution intercalation method to diffuse CTA + ions of cetyltrimethylammonium bromide (CTAB) into the interlayer of clay mineral in the dispersion of a long-chain hydrocarbon solution. It was noted that the static contact angle of organoclay gradually increased the amount of hydrocarbon.…”

Section: Materials Used For Synthesis Of Superhydrophobic Surfacesmentioning

confidence: 99%

Superhydrophobic Surfaces: Insights from Theory and Experiment

2020

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Biomimetic nanosurfaces with distinct wettability and versatility have found special enthusiasm in both fundamental research and industrial applications. With the advent of nanotechnology, it is doable to acclimate surface architecture and surface chemistry to attain superhydrophobicity. The uniqueness of superhydrophobic surfaces arises from various phenomenal advances, and its progress is expected to continue for decades in the future. In this Review Article, we discuss recent progress made in defining physical aspects of numerical modeling, experimental practices adopted, and applications of superhydrophobic surfaces. First, we revisit various classical models of superhydrophobicity and recent theoretical advances achieved related to the wetting phenomena. Subsequently, we emphasize various precursors and advance fabrication strategies adopted to fabricate superhydrophobic surfaces. In the following section, we take up various potential applications and appropriate working principles to explain wettability phenomena. Finally, some general conclusions are drawn along with proposed guidelines for designing robust superhydrophobic coatings.

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“…The CTAB-modified clay was prepared according to a previously published procedure on the preparation of surfactant modified montmorillonite. 28,29 The cation exchange capacity (CEC) of the clay was determined by the methylene blue test (ANSI/ASTM C837-76). The results are given in Table 1.…”

Section: Methodsmentioning

confidence: 99%

The multiple effects of organoclay and solvent evaporation on hydrophobicity of composite surfaces

Yolcu¹,

Gürses²,

Boukherroub³

2017

Turk J Chem

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Abstract:A superhydrophobic high-density polyethylene (HDPE)/organoclay composite material with a water-static contact angle of ∼ 162• and low hysteresis (7 • ) was prepared by a simple solution-intercalation technique. This onestep method consists of the insertion of organoclay, produced through cation exchange with cetyltrimethylammonium bromide (CTAB), in the polymer matrix at 120• C in xylene. In this process, evaporation of the solvent and organoclay amount are key factors for the achievement of superhydrophobicity. We characterized composite material with X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and contact angle measurements. The characterizations showed that the organoclay provides a place for the formation of small polymer aggregates and facilitates the evaporation of the organic solvent. The technique described here is simple and does not require any complicated process.

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Synthesis of Super Hydrophobic Clay by Solution Intercalation Method from Aqueous Dispersions

Cited by 9 publications

References 34 publications

Biodegradable PLA based nanocomposites for packaging applications: The effects of organo‐modified bentonite concentration

Biodegradable PLA based nanocomposites for packaging applications: The effects of organo‐modified bentonite concentration

Superhydrophobic Surfaces: Insights from Theory and Experiment

The multiple effects of organoclay and solvent evaporation on hydrophobicity of composite surfaces

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