Superhydrophobic coating from fluoroalkylsilane modified natural rubber encapsulated SiO2 composites for self-driven oil/water separation

Saengkaew, Jittraporn; Le, Duy; Samart, Chanatip; Sawada, Hideo; Nishida, Masakazu; Chanlek, Narong; Kongparakul, Suwadee; Kiatkamjornwong, Suda

doi:10.1016/j.apsusc.2018.08.059

Cited by 62 publications

(22 citation statements)

References 45 publications

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“…The high-resolution C 1s spectrum of F-CS aerogel is shown in Figure 2 B. There are four characteristic peaks at 293.8, 286.8, 284.8, and 284.0 eV attributing to the fluorocarbons in C-F 3 , C-O, C-C and C-Si groups, respectively [ 24 , 25 , 26 ].…”

Section: Resultsmentioning

confidence: 99%

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Zhu

Jiang

Liu

et al. 2021

Gels

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A superhydrophobic fluorinated silica functionalized chitosan (F-CS) aerogel is constructed and fabricated by a simple and sustainable method in this study in order to achieve highly efficient gravity-driven oil/water separation performance. The fluorinated silica functionalization invests the pristine hydrophilic chitosan (CS) aerogel with promising superhydrophobicity with a water contact angle of 151.9°. This novel F-CS aerogel possesses three-dimensional structure with high porosity as well as good chemical stability and mechanical compression property. Moreover, it also shows striking self-cleaning performance and great oil adsorption capacity. Most importantly, the as-prepared aerogels exhibits fast and efficient separation of oil/water mixture by the gravity driven process with high separation efficiency. These great performances render the prepared F-CS aerogel a good candidate for oil/water separation in practical industrial application.

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Section: Resultsmentioning

confidence: 99%

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Zhu

Jiang

Liu

et al. 2021

Gels

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“…Generally, a surface with a water contact angle (WCA) in the range of 90°–150° is considered as a hydrophobic surface 1 . Where a surface displays a WCA greater than 150° and has a very small sliding‐off angle of less than 10°, these surfaces are referred to as superhydrophobic 2,3 . This property is attractive for both academic and industrial applications, such as water‐proofing, 4 self‐cleaning, 5,6 anti‐fogging, 2 and anti‐corrosion, 7 and for use in many fields, such as oil/water (o/w) separation 3,8 and coating processes for textile, paper, or metals, 4,7,9,10 including in biomedical applications to prevent biofilm formation or bacterial attachment 11,12 …”

Section: Introductionmentioning

confidence: 99%

“…In terms of environmental problems, the growth of the population and expansion of industrial areas leads to the production of large quantities of wastewater contaminated with oils or hydrocarbons 19,20 . Among various methods for solving this problem, materials having a superhydrophobic–superoleophilic surface can be applied to separate the oil from an o/w mixture via simultaneous absorption/permeation of the oil while repelling the water 3,21,22 . Thus, the preparation of a highly hydrophobic or superhydrophobic NR surface is attractive for such problem‐based areas.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the preparation of a highly hydrophobic or superhydrophobic NR surface is attractive for such problem‐based areas. For example, Saengkaew et al 3 prepared superhydrophobic/superoleophilic mesh by coating it with fluoroalkylsilane‐modified NR encapsulated silica (SiO 2 ) latex for self‐driven oil/water separation. Tao et al 23 synthesized hybrid particles of NR particles with in‐situ synthesized gold nanoparticles (ANPs) for treating cotton in order to obtain hydrophobic fabrics that could be used for o/w separation.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of superhydrophobic natural rubber film via grafting of methyltrichlorosilane

Ngamdee

Yimmut

Hinchiranan

2021

Polymers for Advanced Techs

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Nowadays, natural rubber (NR) is extensively applied in medical‐healthcare devices. A clogging or bacterial attachment onto product's surface can be avoided by creating the non‐fouling surface for extending the NR utilization. Herein, a superhydrophobic NR film was prepared using two‐step surface modification involving sulfuric acid (H2SO4)‐catalyzed hydration to form hydroxyl (OH) functional groups on the rubber surface followed by grafting with methyltrichlorosilane (MTCS). From X‐ray photoelectron spectroscopy analysis, the immersion of a vulcanized NR film (VNR) in 75 wt% H2SO4 solution for 1 h showed the highest area portion of OH groups on the VNR surface (50.9%), which were expected to act as the active sites for grafting with MTCS via hydrolysis and polycondenzation to obtain a VNR‐OH‐MTCS film. As a measure of the hydrophobicity, the water contact angle (WCA) of the VNR‐OH‐MTCS film prepared by using 2 wt% MTCS concentration was greatest at 155° with a high roughness of 1790 nm. The glass transition temperature and antimicrobial activity of the VNR film were not affected by these surface modifications. This indicated that the superhydrophobic VNR‐OH‐MTCS film maintained the flexibility with ability to inhibit the formation of a bacterial biofilm. Not only superhydrophobicity, the VNR‐OH‐MTCS film also had oleophilicity (oil absorption capacity [k] of 1.13) suggesting that it could be applied for oil/water separation with high separation efficiency of 98.6%. Moreover, the VNR‐OH‐MTCS film still had high hydrophobicity with WCA of 138°–142° after 20 abrasion cycles using a sandpaper under the weighting load not over than 50 g.

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“…Moreover, with respect to the MCF rubber, the contact resistance must be reduced such that the adhesion between the electrodes and MCF rubber has higher sensitivity. This problem is related to the general research themes of adhesion between the metal and rubber [11,12,13,14,15,16,17] and the prevention of corrosion of the metal surface [18,19,20,21]. Hence, various methods of adhesion between the metal and rubber have been hitherto proposed.…”

Section: Introductionmentioning

confidence: 99%

Novel Adhesion Technique Using Metallic or Non-Metallic Hydrous Oxide of Metal Complexes Involving Magnetic Compound Fluid Rubber under Electrolytic Polymerization and Magnetic Field for Producing Sensors

Shimada

Kikura

Takahashi

et al. 2019

Sensors

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As per sequential studies on new types of soft rubber for the artificial skin of robots, smart sensors, etc., we have proposed and investigated hybrid skin (H-Skin) and haptic sensors by using magnetic compound fluid (MCF), compounding natural rubber latex (NR-latex), and applying electric and magnetic fields. Through electrolytic polymerization, the MCF rubber is solidified. The MCF rubber has hybrid sensing functions and photovoltaic effects, and electric charge as battery. In case of the production of soft rubber sensors, however, the problem of adhesion between metal electrodes and rubber is very important. In the present study, we propose a novel adhesive technique for bonding the metal electrodes and MCF rubber by using metallic or non-metallic hydrous oxide, which is a metal complex, via electrolytic polymerization. The anionic radical hydrate reacts with the isoprene molecules of NR-latex or chloroprene rubber latex (CR-latex) such that they are cross-linked and the MCF rubber with the hydrate is solidified, which can be represented via a chemical reaction equation. By means of this adhesive technique, we presented five cases of sensors fabricated using metal electrodes and rubbers. This technique is applicable for novel cohesion between rubber and metal.

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Superhydrophobic coating from fluoroalkylsilane modified natural rubber encapsulated SiO2 composites for self-driven oil/water separation

Cited by 62 publications

References 45 publications

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Fabrication of superhydrophobic natural rubber film via grafting of methyltrichlorosilane

Novel Adhesion Technique Using Metallic or Non-Metallic Hydrous Oxide of Metal Complexes Involving Magnetic Compound Fluid Rubber under Electrolytic Polymerization and Magnetic Field for Producing Sensors

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