Enhancing antifogging/frost-resisting performances of amphiphilic coatings via cationic, zwitterionic or anionic polyelectrolytes

Bai, Shuo; Li, Xiaohui; Zhang, Rongchun; Li, Chuan; Zhu, Kun; Sun, Pingchuan; Zhao, Yunhui; Ren, Lixia; Yuan, Xiaoyan

doi:10.1016/j.cej.2018.09.177

Cited by 69 publications

(53 citation statements)

References 45 publications

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“…Antifogging performance of the blending coatings was evaluated by both qualitative and quantitative measurements. − ,− First, optical images were photographed during both hot-vapor and cold-warm antifogging tests as showed in Figure A. The bare glass fogged up immediately either placing them over boiling water or after storing in a refrigerator for 30 min, whereas the coated surfaces maintained visible clearness under hot-vapor antifogging measurement, demonstrating a remarkable antifogging behavior.…”

Section: Resultsmentioning

confidence: 99%

“…The main reason of optical loss is endoscopic lens fogging, which is caused by the discrepancies in temperature and humidity between ambient conditions and in vivo . Most antifogging approaches for medical devices are based on traditional methods, for instance, spraying antifogging reagents or employing heating apparatus, but they show disadvantages of short residual action, cumbersome procedure, high medical expenses, and so on. , Currently, developing coating surfaces with enhanced antifogging performance has been gaining much attention to solve the atomization problem. − In addition to superhydrophilic and superhydrophobic strategies, applying a water-absorbing coating with amphiphilicity to a surface is an effective antifogging approach, where the condensed water molecules or the moist vapor can be rapidly imbibed into the bulk of the coating, followed by uniform diffusion of the absorbed water molecules to prevent the formation of a large and light-scattering water domain. − ,− …”

Section: Introductionmentioning

confidence: 99%

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Antifogging/Antibacterial Coatings Constructed by N-Hydroxyethylacrylamide and Quaternary Ammonium-Containing Copolymers

Bai

Zhao

et al. 2020

ACS Appl. Mater. Interfaces

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Endoscopic surgery has gained widespread applications in various clinical departments, and endoscope surfaces with antifogging and antibacterial properties are essential for elaborate procedures. In this work, novel antifogging/antibacterial coatings were developed from a cationic copolymer and a hydrophilic copolymer, polyhedral oligomeric silsesquioxane-poly(quaternary ammonium compound-co-2-aminoethyl methacrylate hydrochloride) [POSS-P(QAC-co-AEMA)] and poly(N-hydroxyethylacrylamide-co-glycidyl methacrylate) [P(HEAA-co-GMA)] via a facile and green blending method. Such transparent coatings showed excellent antifogging performance under both in vitro and in vivo fogging conditions, mainly attributed to the high water-absorbing capability of HEAA and QAC. Antibacterial assays proved that the blending coatings had a superior antibacterial property, which could be improved with the proportion of POSS-P(QAC-co-AEMA) because of the bactericidal efficiency of cationic QAC. Meanwhile, owing to the high hydratability of HEAA, the blending coatings exhibited a bacteria-repelling property. By simply tuning the blending ratio of POSS-P(QAC-co-AEMA) and P(HEAA-co-GMA), the comprehensive bacteria-killing and bacteria-repelling properties of the coatings were achieved. Moreover, after incubating with red blood cells, the prepared blending coatings presented a lower hemolytic rate of less than 5%. The findings provided a potential means for addressing the challenge of fogging and bacterial contamination occurring in endoscopic lenses and other medical devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Antifogging/Antibacterial Coatings Constructed by N-Hydroxyethylacrylamide and Quaternary Ammonium-Containing Copolymers

Bai

Zhao

et al. 2020

ACS Appl. Mater. Interfaces

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“…Antifogging films have increasingly attracted much attention lately for a wide variety of practical applications including goggles, eyeglasses, windshields, mirrors, solar cells, medical/analytical instruments, and other industrial equipment. − To achieve such antifogging properties, preparation of superhydrophilic surfaces with static water contact angles (CAs, θ S ) of less than 5° is one of the most promising approach because on such surfaces, condensed water will rapidly form into a continuous transparent water-thin layer instead of formation of many small droplets, allowing for the reduction of visible light scattering. , Superhydrophilic surfaces have been widely prepared based on various techniques including layer-by-layer (LbL) deposition, − chemical vapor deposition (CVD), reactive ion/chemical etching, − postcalcination, − and so on, using silica (SiO 2 ) or UV-light-activated titanium dioxide (TiO 2 ) nanoparticles (NPs)/films, − ,, positively/negatively charged polyelectrolytes and/or NPs, − highly water-absorbent polymers, − composite hydrogels, − or polymer brushes. − Among these approaches, conventional methods for the preparation of superhydrophilic surfaces relying on textured/layered structures can be complicated, time-consuming, and not suitable for mass production. In addition, such man-made superhydrophilic surfaces typically lack self-healing abilities observed on living surfaces and so their functionalities are immediately and permanently lost once they are physically or chemically damaged.…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Formation of Fluorosurfactant-Doped Transparent Nanocomposite Films Showing Durable Antifogging, Oil-Repellent, and Self-healing Properties

2020

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Transparent nanocomposite films with multiple functionalities, such as durable antifogging, dynamic oleophobic, self-healing properties, were successfully prepared by a simple spin- or spray-coating method using aqueous solutions of poly(vinylpyrrolidone) (PVP) and aminopropyl-functionalized nanoclay (AMP-clay) platelets. In this study, anionic/waterborne perfluorooctanesulfonic acid potassium salt (PFOS) was premixed with the aqueous PVP solution to achieve a homogeneous dispersion of PFOS. Due to the addition of PFOS, the resulting nanocomposite film surfaces displayed statically hydrophobic (static water contact angle over 90°) and dynamically oleophobic (5 μL of oil droplets could slide off of the surface at low sliding/substrate tilt angles of less than 10°) behaviors. In spite of our nanocomposite film surface exhibiting a statically hydrophobic nature, the antifogging properties remained unchanged even after being left under high-humidity conditions (over 80% relative humidity) for 3 days. Thanks to both exceptional water-absorbing properties of PVP/AMP-clay matrices and good mobility of PFOS driven by moisture, our oil-repellent nanocomposite films could be repeatedly self-healed even after both severe physical (cutting, scratching, or falling sand abrasion) and chemical (vacuum UV oxidation) damages. Large-scale fabrication of this multifunctional nanocomposite film (30 cm × 30 cm) could also be successfully demonstrated by a spray-coating method based on in situ gel formation.

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“…[ 2 ] There are widespread potential applications of materials with underwater superoleophobicity, such as antifouling, self‐cleaning, antifogging, and oil/water separation. [ 3–5 ]…”

Section: Figurementioning

confidence: 99%

Zwitterionic Polymer‐Grafted Superhydrophilic and Superoleophobic Silk Fabrics for Anti‐Oil Applications

Cheng

Wang

et al. 2020

Macromol. Rapid Commun.

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A highly anti‐oil fabric membrane is synthesized by surface grafting of zwitterionic poly(sulfobetaine methacrylate) (PSBMA) onto the fabric surface. The fabric membrane is first enzymatically modified to create more reactive amine groups on the surface. A surface‐initiated atom transfer radical polymerization (SI‐ATRP) reaction is then performed to modify the fabric membrane surface with a dense PSBMA brush layer. Surface characterization indicates that the brush‐grafted fabric membrane exhibits increased surface roughness and improved superhydrophilicity. The PSBMA‐modified silk fabrics show a very large contact angle for oil droplets in water, and have excellent oil resistance in air and in water–oil mixtures.

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Enhancing antifogging/frost-resisting performances of amphiphilic coatings via cationic, zwitterionic or anionic polyelectrolytes

Cited by 69 publications

References 45 publications

Antifogging/Antibacterial Coatings Constructed by N-Hydroxyethylacrylamide and Quaternary Ammonium-Containing Copolymers

Antifogging/Antibacterial Coatings Constructed by N-Hydroxyethylacrylamide and Quaternary Ammonium-Containing Copolymers

Large-Scale Formation of Fluorosurfactant-Doped Transparent Nanocomposite Films Showing Durable Antifogging, Oil-Repellent, and Self-healing Properties

Zwitterionic Polymer‐Grafted Superhydrophilic and Superoleophobic Silk Fabrics for Anti‐Oil Applications

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