Super-hydrophobic coatings on cotton fabrics using sol–gel technique by spray

Espanhol-Soares, Melina; Costa, Larissa; Silva, Milady Renata Apolinário da; Silva, Flávio Soares; Ribeiro, Larissa Mayra Silva; Gimenes, Rossano

doi:10.1007/s10971-020-05307-x

Cited by 23 publications

(11 citation statements)

References 38 publications

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“…Such surface can be realized through the synergistic effect of two main factors: modification with low-surfaceenergy materials and creation of a certain type of hierarchal micro-nanostructure. Up to now, numerous effective approaches have been developed to prepare superhydrophobic surfaces, including sol-gel [34,35], template [36], electrospinning [37], hydrothermal synthesis [26,38], laser fabrication [39], etching [40,41] and electrochemical processes [42]. The superhydrophobic surfaces with micro-nano structures on the metallic substrates have also been reported in some previous work [6,16,[43][44][45][46][47][48][49].…”

Section: Introductionmentioning

confidence: 88%

A General Strategy towards Superhydrophobic Self-Cleaning and Anti-Corrosion Metallic Surfaces: An Example with Aluminum Alloy

Zheng

Cheng

Zhang³

et al. 2021

Coatings

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Corrosion and contamination of metallic structures can cause loss of their functionality as well as aesthetic values. In this study, we describe a general strategy to prepare superhydrophobic self-cleaning and anti-corrosion surfaces for metallic structures. As a specific example, a superhydrophobic coating (SHC) on aluminum alloy was prepared by a simple etching combined with the decoration of a low-surface-energy material. The optimal SHC has a water contact angle (CA) at ~157.4° and a sliding angle (SA) of ~8.3° due to the synergy of binary hierarchical structures and chemical modification. The SHC showed low adhesion to dry contaminants and a series of liquids, displaying a good self-cleaning effect. The SHC maintained superhydrophobicity after exposure to air and humid condition at 60 °C for 7 days. In addition, the electrochemical measurements reveal that the anti-corrosion performance was enhanced by reducing the corrosion current density (Jcorr) by 1 order of magnitude and increasing the corrosion potential (Ecorr) by 0.527 V as compared to the bare Al alloy substrate after immersion for 168 h.

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Section: Introductionmentioning

confidence: 88%

A General Strategy towards Superhydrophobic Self-Cleaning and Anti-Corrosion Metallic Surfaces: An Example with Aluminum Alloy

Zheng

Cheng

Zhang³

et al. 2021

Coatings

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“…This all applies especially to synthetic fibers like polyesters, polyamides or polypropylene 12 but also for cotton. 15 The wet permanence and the mechanical properties of sol-gel coatings can be improved, for instance, by the application of epoxy-functionalized inorganic polymers or by the addition of organic resins. 7,11,14,[18][19][20][21][22][23] However, the miscibility of both components is often insufficient which results in phase separation of reactant mixtures.…”

Section: Introductionmentioning

confidence: 99%

“…As an alternative, aqueous sol-gel coatings are applied in textile finishing to achieve a variety of finishing effects, like repellency of dirt, water, and oil, which are beneficial for protective clothes or for outdoor and technical applications. [4][5][6][7][8][9][10][11][12][13][14][15][16] Furthermore, the sol-gel process in organic solvents coupled with a waterreleasing chemical reaction can also be used to increase hydrophilicity of fabrics. 17 In many cases, the coatings are of poor resistance due to their low mechanical strength, toughness, and/or wet permanence.…”

Section: Introductionmentioning

confidence: 99%

Textile functionalization by combination of twin polymerization and polyalkoxysiloxane‐based sol–gel chemistry

Kaßner

Zhu

Schaefer

et al. 2022

J of Applied Polymer Sci

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The surface modification of textile fibers by coating with nanostructured organic–inorganic hybrid materials is presented. The hydrophobic, solvent resistant and mechanically robust coatings were produced by combining the twin monomer 2,2′‐spirobi[benzo‐4H‐1,3,2‐dioxasiline] (TM) and polyalkoxysiloxanes (silica precursor polymers) in a catalyzed polymerization process. For the application in textile finishing, both aqueous emulsions and ethanolic solutions of mixtures were developed. The precisely adjusted ratio of TM and polyalkoxysiloxanes enabled controlling of the organic and inorganic portions in the hybrid layer. The polymerization process can be advantageously combined with the ring‐opening polymerization of hexamethylcyclotrisiloxane (HMCTS). The resulting ethanolic twin prepolymer solutions and the polyethoxysiloxane emulsions were easy to handle and thus represent a novel and attractive binder for PET surfaces. The coated fabrics were analyzed by means of scanning electron microscopy and X‐ray photoelectron spectroscopy showing hybrid material formation as a homogeneous, sealed surface layer. Improved hydrophobicity as well as resistance to mechanical stress was proven by water droplet‐ and Martindale tests.

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“…The fabrication procedure of superhydrophobic fabric is complex or troublesome. 35,36 While papers 10,11 reported that they used a one-step sol-gel process to prepare superhydrophobic fabrics, but in fact, they needed to prepare the gel in advance and then modify the fabric. The process still requires two or more steps.…”

Section: Introductionmentioning

confidence: 99%

One-step hydrothermal method to prepare superhydrophobic cotton fabric with antibacterial properties

Sheng

Zhang

2021

Journal of Engineered Fibers and Fabrics

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Superhydrophobic antibacterial cotton fabric can be widely applied in outdoor clothing, hospital bedding, and other fields. However, the existing manufacturing methods are difficult or complicated. Herein, a facile and straightforward fabrication strategy is proposed via a one-step hydrothermal method to construct micro-nanometer hierarchical structure with low surface energy on fabric. In an appropriate amount, 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (PFOTES) and tetrabutyl titanate (TBT) were mixed in a hydrothermal reactor to generate titanium dioxide. Meanwhile, the PFOTES agent was hydrolyzed and condensed, bonded with titanium dioxide, and finally grafted onto the fiber together. Morphology and elements results demonstrated that the fabric surface was covered by the TiO2 nanoparticles with superhydrophobic coating. The chemical bonds of Si-O-Ti, Ti-O-C, and Ti-O-Ti revealed the structural relationship between TiO2 with PFOTES and cotton fibers. The water contact angle of the fabric obtained can reach to 168°. The fluorinated-TiO2 cotton fabric showed high antibacterial properties in visible light against E. coli and S. aureus. This simple method of preparing superhydrophobic and antibacterial fabric exhibited great potential in the field of functional textiles such as outdoor garments and hospital-related applications.

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Super-hydrophobic coatings on cotton fabrics using sol–gel technique by spray

Cited by 23 publications

References 38 publications

A General Strategy towards Superhydrophobic Self-Cleaning and Anti-Corrosion Metallic Surfaces: An Example with Aluminum Alloy

A General Strategy towards Superhydrophobic Self-Cleaning and Anti-Corrosion Metallic Surfaces: An Example with Aluminum Alloy

Textile functionalization by combination of twin polymerization and polyalkoxysiloxane‐based sol–gel chemistry

One-step hydrothermal method to prepare superhydrophobic cotton fabric with antibacterial properties

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