Superhydrophobic coatings and self-cleaning through the use of geothermal scaling silica in improvement of material resistance

Purnomo, Ari; Dalanta, Febio; Oktaviani, Adelia Dian; Silviana, Silviana

doi:10.1063/1.5065037

Cited by 21 publications

(16 citation statements)

References 17 publications

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“…Based on previous research [ 13 ], the surface morphology of geothermal silica waste has an increase in pore uniformity of 30% to a porous structure with a pore uniformity of 90% [ 13 ]. Pore uniformity affects silica dissolution wherein pore uniformity above 80% can prevent the agglomeration of superhydrophobic silica solution [ 10 ].…”

Section: Resultsmentioning

confidence: 99%

“…The filtration was conducted to separate the solid silica and filtrate. The solid was subjected to drying for 3 h. The dried silica was introduced by sieving and releasing nano-sized silica by high-energy milling for 2 h [ 13 ].…”

Section: Methodsmentioning

confidence: 99%

“…The addition of water glass requires two stages of immersion and the use of tetraethoxysilane (TEOS) can produce a contact angle of 150−180° but it causes inhalation toxicity [ 12 ]. Previous research results show that geothermal scaling waste has a silica content of up to 88% and a high silica content will increase surface hydrophobicity while having a lower level of toxicity than TEOS [ 12 , 13 ]. Therefore, silica obtained from geothermal scaling waste is very potential to be used as raw material for superhydrophobic coating to replace TEOS.…”

Section: Introductionmentioning

confidence: 99%

“…Geothermal solid waste has the potential as a sustainable source of silica due to high silica content and the capacity for a huge amount of waste. The Indonesian Institute of Sciences (LIPI) stated that geothermal waste in Dieng has a liquid waste as brine water capacity of 10 tons/day releasing solid waste of one ton/day [ 13 ]. This paper investigates the preparation of a superhydrophobic layer using geothermal solid waste as a precursor of sodium silicate with the addition hexamethyldisilazane (HMDS) and trimethylchlorosilane (TMCS) through a single stage mixing process by means of a spray coating method.…”

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic Coating Derived from Geothermal Silica to Enhance Material Durability of Bamboo Using Hexadimethylsilazane (HMDS) and Trimethylchlorosilane (TMCS)

et al. 2021

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Bamboo, a fast-growing plant from Asia, is used as building material with unique properties, while exhibiting fast degradation due to its hydrophobicity. Therefore, many attempts have been implemented using several technologies for bamboo modification to alter the hydrophobicity. Most previous studies producing superhydrophobic properties are conducted by using tetraethoxysilane (TEOS) as a precursor agent. However, this method, using TEOS with harmful properties and unaffordable compounds, requires many steps to accomplish the experimental method. Therefore, this paper employed geothermal solid waste as a silica source of the precursor. Thus, an effective and efficient method was applied to prepare superhydrophobic coating by using a precursor of geothermal silica and further modification using hexamethyldisilazane (HMDS) and trimethylchlorosilane (TMCS). The research was executed by the full factorial statistical method using two numerical variables (HMDS/TMCS concentration and silica concentration) and one categorical variable (solvent types). The uncoated material revealed higher weight gain in mass and moisture content than that of the coated bamboo after the soil burial test to assess the durability of the bamboo. However, the durability of superhydrophobic coating realized hydrophobic performance for both agents during sand abrasion for a total of 120 s at an angle of 45°. Statistical results showed the optimum contact angle (CA) achieved in superhydrophobic performance with lower silica concentration for HMDS concentration and the appropriate solvent of n-hexane for HMDS and iso-octane for TMCS. All results were supported using many instruments of analysis to confirm the step-by-step alteration of geothermal silica to be used as a superhydrophobic coating, such as XRF, XRD, FTIR, SEM, and SEM EDX.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic Coating Derived from Geothermal Silica to Enhance Material Durability of Bamboo Using Hexadimethylsilazane (HMDS) and Trimethylchlorosilane (TMCS)

et al. 2021

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“…One of the standard specifications required in Na 2 SiO 4 is to contain silica of approximately 97% (Ranawat, 2000). Purification of metal oxide particles contained in geothermal silica can be reduced using acid solution (Anas Boussaa, Kheloufi, Boutarek Zaourar, & Bouachma, 2017;Purnomo, Dalanta, Oktaviani, & Silviana, 2018). Research using silica purification with acid has been investigated (Boussaa et al, 2017).…”

Section: Preparation Of Silica Purificationmentioning

confidence: 99%

Preliminary Study of Chitosan Coating Silica Derived from Geotermal Solid Waste

Silviana¹,

Noorpasha²,

Rahman³

2020

cea

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Purpose: The purposes of this research are to study preparation of chitosan coating silica aerogel derived from solid geothermal waste as adsorbent of CO 2 and CH 4 separation and to study CO 2 adsorption kinetics on chitosan coating silica aerogel by Pseudo First Order and Second Order methods. Methodology was conducted consisting of several steps. First, geothermal silica was leached with H 2 SO 4 20% 1: 5 w/v. Then, chitosan was added into silica

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Optimizing the environmentally friendly silica-cellulose aerogel composite for acoustic insulation material derived from newspaper and geothermal solid waste using a central composite design

Silviana

Hermawan

Indracahya

et al. 2022

J Sol-Gel Sci Technol

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Superhydrophobic coatings and self-cleaning through the use of geothermal scaling silica in improvement of material resistance

Cited by 21 publications

References 17 publications

Superhydrophobic Coating Derived from Geothermal Silica to Enhance Material Durability of Bamboo Using Hexadimethylsilazane (HMDS) and Trimethylchlorosilane (TMCS)

Superhydrophobic Coating Derived from Geothermal Silica to Enhance Material Durability of Bamboo Using Hexadimethylsilazane (HMDS) and Trimethylchlorosilane (TMCS)

Preliminary Study of Chitosan Coating Silica Derived from Geotermal Solid Waste

Optimizing the environmentally friendly silica-cellulose aerogel composite for acoustic insulation material derived from newspaper and geothermal solid waste using a central composite design

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