Self-Healing of Biocompatible Superhydrophobic Coatings: The Interplay of the Size and Loading of Particles

Çelik, Nusret; Şahin, Furkan; Özel, Sultan Süleyman; Sezer, Gülay; Gunaltay, Nail; Ruzi, Mahmut; Önses, M. Serdar

doi:10.1021/acs.langmuir.2c02795

Cited by 13 publications

(3 citation statements)

References 47 publications

(83 reference statements)

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“…This aspect is particularly important for applications such as medical and microfluid devices. [39,40] Silicone is widely considered as a biocompatible material. To qualitatively assess the biocompatibility of silicone grafted silica NPs, we performed several different tests.…”

Section: Mechanochemical Fabrication Of Superhydrophobic Surfacesmentioning

confidence: 99%

Sustainable and Practical Superhydrophobic Surfaces via Mechanochemical Grafting

Çelik

Akay

Şahin

et al. 2023

Adv Materials Inter

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contact angle (>150°) and readily roll off at low sliding angles. [1][2][3] Popularized by the discovery and elucidation of selfcleaning mechanism of lotus leaves, [4,5] superhydrophobic surfaces have attracted significant attention for practical applications such as self-cleaning solar cells, [6][7][8] corrosion inhibition layers on metal surfaces, [9,10] anti-icing coatings, [11,12] and oil/water separation membranes and meshes. [13][14][15] Superhydrophobic surfaces have been adopted in a number of niche applications such as blood-repellent garments, [16] anti-biofouling coatings, [17,18] and to concentrate molecules for bio-assay analysis and increase detection limit. [19,20] Superhydrophobic surfaces feature heterogeneous morphology with nanoscopic and microscopic roughness in the form of protrusions separated by air pockets and are generally fabricated by using low surface energy materials. [21] The combination of nano/micro-scale protrusions with low surface energy leads to diminished adhesion and improved droplet mobility.The excessive usage of solvents and toxic chemicals, long and tedious chemical processes, limited biocompatibility, and costly materials are challenges in the sustainable fabrication of superhydrophobic surfaces. A convenient and universal method, also adapted in commercialThe broad adoption of superhydrophobic surfaces in practical applications is hindered by limitations of existing methods in terms of excessive usage of solvents, the need for tedious and lengthy chemical processes, insufficient biocompatibility, and the high cost of materials. Herein, a mechanochemical approach for practical and solvent-free manufacturing of superhydrophobic surfaces is reported. This approach enables solvent-free and ultra-rapid preparation of superhydrophobic surfaces in a single-step without the need for any washing, separation, and drying steps. The hydrolytic rupture of siloxane bonds and generation of free radicals induced by mechanochemical pathways play a key role in covalent grafting of silicone to the surface of nanoparticles that leads to superhydrophobic surfaces with a water contact angle of >165° and a sliding angle of <2°. The direct use of industrially available and nonfunctional silicone materials together with demonstrated applicability to inorganic nanoparticles of varied composition greatly contribute to the scalability of the presented approach. The resulting superhydrophobic surfaces are highly biocompatible as demonstrated by fibroblast cells using two different assays. Monolith materials fabricated from silicone-grafted nanoparticles exhibit bulk and durable superhydrophobicity. The presented approach offers tremendous potential with sustainability, scalability, cost-effectiveness, simplicity, biocompatibility, and universality.

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Section: Mechanochemical Fabrication Of Superhydrophobic Surfacesmentioning

confidence: 99%

Sustainable and Practical Superhydrophobic Surfaces via Mechanochemical Grafting

Çelik

Akay

Şahin

et al. 2023

Adv Materials Inter

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“…There are three main strategies for preparing water-repellent surfaces with low sliding angles. The first strategy involves obtaining superhydrophobic surfaces by combining topographic structures with low-surface-energy chemicals. , This state, known as the Cassie state, , facilitates the rolling of water droplets at low tilt angles by trapping air between the water and surface features . However, the instability of the air layer poses a challenge, particularly for water penetration under external pressure, condensation in humid environments, and low-surface-tension liquids.…”

Section: Introductionmentioning

confidence: 99%

“…7,8 This state, known as the Cassie state, 9,10 facilitates the rolling of water droplets at low tilt angles by trapping air between the water and surface features. 11 However, the instability of the air layer poses a challenge, particularly for water penetration under external pressure, condensation in humid environments, and low-surface-tension liquids. Additional disadvantages include poor mechanical stability and opaqueness, which emerge from the fragility and light scattering of the topographic structures, respectively.…”

Section: ■ Introductionmentioning

confidence: 99%

Mechanochemical Activation of Silicone for Large-Scale Fabrication of Anti-Biofouling Liquid-like Surfaces

Celik,

Sahin,

Ruzi

et al. 2023

ACS Appl. Mater. Interfaces

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Large-scale preparation of liquid-like coatings with perfect transparency via solventless and room-temperature processes using low-cost and biocompatible materials is of tremendous interest for a broad range of applications. Here, we present a mechanochemical activation strategy for solventless grafting of poly(dimethylsiloxane) (PDMS) onto glass, silicon wafers, and ceramics. Activation is achieved via ball milling PDMS without using any solvents or additives prior to application. Ball milling results in chain scission and generation of free radicals, allowing room-temperature grafting at durations ≤1 h. The deposition of ball-milled PDMS can be facilitated by brushing or drop-casting, enabling large-scale applications. The resulting surfaces facilitate the sliding of droplets at angles <20° for liquids with surface tension ranging from 22 to 73 mN/m. An important application for public health is generating anti-biofouling coatings on sanitary ware. For example, PDMS-grafted surfaces prepared on a regular-size toilet bowl exhibit a 105-fold decrease in the attachment of bacteria from urine. These findings highlight the significant potential of mechanochemical processes for the practical preparation of liquid-like surfaces.

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An innovative approach to develop plant-derived and CO2-based active biocomposite films towards antioxidant activity

Dominici,

Collins,

Morris

et al. 2024

emergent mater.

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In this study, novel biocomposites composed of CO2-derived poly(propylene) carbonate and plant-based cellulose were developed employing solvent casting technique. An innovative and rapid strategy was employed, whereby pre-dissolving cellulose improves dramatically the compatibility of poly(propylene) carbonate with cellulose whilst pristine cellulose powder displays inhomogeneous distributions of cellulose within the biocomposite. Resulting biocomposites produce flat homogeneous surfaces with low cellulose content, whilst rougher surfaces and thicker cross sections were observed in films with higher cellulose content. Developed biocomposites outperformed biocomposites produced from pristine cellulose powder in terms of homogeneity, thermal stability, antioxidant activity and biocompatibility. Higher cellulose content samples show the formation of a new hydrogen bonding network between PPC and cellulose polymer chains and this contributes to improved thermal stability. TGA results reveal improved thermal stability for high cellulose content films and show enhanced water vapor permeability. A cell viability study shows that the developed materials are biocompatible. Curcumin, a natural antioxidant, was incorporated into optimized biocomposites to produce active biocomposites with antioxidant features to accelerate wound healing. Curcumin is shown to display a sustained release profile over a time period of 3 days, and this is ideal for would healing. The curcumin-functionalized biocomposites also contributed to enhanced thermal stability and water vapor permeability. Thus, these biocomposite films show promise as active biocomposites which can be used for biomedical applications such as wound healing.

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Self-Healing of Biocompatible Superhydrophobic Coatings: The Interplay of the Size and Loading of Particles

Cited by 13 publications

References 47 publications

Sustainable and Practical Superhydrophobic Surfaces via Mechanochemical Grafting

Sustainable and Practical Superhydrophobic Surfaces via Mechanochemical Grafting

Mechanochemical Activation of Silicone for Large-Scale Fabrication of Anti-Biofouling Liquid-like Surfaces

An innovative approach to develop plant-derived and CO2-based active biocomposite films towards antioxidant activity

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