Anti-fogging and anti-frosting behaviors of layer-by-layer assembled cellulose derivative thin film

Shibraen, Mahmoud H.M.A.; Yagoub, Hajo; Zhang, Xuejian; Xu, Jian; Shen, Yang

doi:10.1016/j.apsusc.2016.02.060

Cited by 86 publications

(36 citation statements)

References 33 publications

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“…This may lead to many problems for the use of eyeglasses, windows, mirrors, goggles, and optical instruments. [1][2][3][4] Over the last few decades, an extensive research studies have been reported to prevent the formation of fog and frost on solid surfaces by different approaches including superhydrophobic coatings, 5-7 superhydrophilic coatings 8,9 and combinations of both hydrophilic and hydrophobic properties in the coating. [10][11][12][13][14][15] Hydrophilic surfaces that have a water contact angle of less than 5 o exhibit excellent anti-fog properties because they allow water droplets to spread uniformly to form a thin water film, which reduces light scattering.…”

Section: Introductionmentioning

confidence: 99%

Zwitterionic polymer brush coatings with excellent anti-fog and anti-frost properties

Ezzat

Huang

2016

RSC Adv.

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The formation of fog and frost on transparent surfaces can lead to many problems in our daily life. To address these problems, polymer brushes based on two zwitterionic analogues, poly(sulfobetaine methacrylate) (pSBMA) and poly(sulfobetaine vinylimidazole) (pSBVI), have been prepared by surface-initiated atom transfer radical polymerization (SI-ATRP). Hydrophilic and superhydrophilic pSBMA and pSBVI polymer brushes were prepared by controlling the thickness of the coatings to study the effect of wettability on the anti-fog and anti-frost properties. X-ray photoelectron spectroscopy (XPS), ellipsometry and atomic force microscopy (AFM) were respectively used to determine the interfacial elemental composition, the thickness and the morphology of the brushes. The wettability of the polymer brushes was measured using a water contact angle goniometer. Their anti-fog and anti-frost capabilities were determined visually and tested quantitatively by UV-vis spectroscopy. The results indicated that the optical transmittance of substrates modified with superhydrophilic polymer coatings under both hot and cold fogging conditions was very high. Additionally, no visible frost was formed on the superhydrophilic substrates after storage in a freezer at -20 o C for the duration of the experiment. These results convincingly demonstrated that the resistance of the modified substrates to fogging and frosting is strongly correlated to the surface wettability. Moreover, there is no considerable difference in the performance of pSBMA and pSBVI polymer brushes, but the former is preferred because SBMA monomer is commercially available and requires short polymerization time to obtain superhydrophilicity.

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Section: Introductionmentioning

confidence: 99%

Zwitterionic polymer brush coatings with excellent anti-fog and anti-frost properties

Ezzat

Huang

2016

RSC Adv.

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“…The scratch test is one of the developments from the indentation test [43]. The chronologies of the abrupt changes are defined as (a) Le-p: elasticto-plastic transition, (b) Lc1: cohesive failure due to chipping of the film, (c) Lc2: adhesive failure due to the delamination of film from its substrate, and (d) Lc3: total coating failure due to total exposure of the substrate surface [44,45]. Figure 7 shows graph of depth versus scratch distance of the coating during the scratch experiments.…”

Section: Surface Morphological Analysismentioning

confidence: 99%

Superhydrophilic Smart Coating for Self-Cleaning Application on Glass Substrate

Syafiq

Vengadaesvaran

Pandey

et al. 2018

Journal of Nanomaterials

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In general, superhydrophilic coating on glass substrate possesses water contact angle (WCA) below 10° and contains high self-cleaning properties in outdoor environment as compared to noncoated glass substrate panels. In this study, the superhydrophilic coating behavior on glass substrate has been developed. The micro- and nanosized titanium dioxide (TiO2) particles have been utilized to improve the surface roughness, and the polypropylene glycol (PPG) has been utilized to increase the surface energy of glass substrates. The wettability of coating surface shows the coating possess water contact angle (WCA) as low as 5° and suddenly reduce to 0° after 10 s. Superhydrophilic coated glass clearly shows excellent dirt repellent against dilute ketchup solution due to the absence of dirt streak on the glass surface. Meanwhile, the dirt streak is present on the bare glass surface indicating its weak self-cleaning property. The developed superhydrophilic coating on glass substrate was also found to have great antifog property compared to the bare glass substrate. Superhydrophilic surfaces have showed free tiny droplet even at 130°C of hot boiling bath for 10 min and completely dry after 1 min. The superhydrophilic coating surfaces have demonstrated free water streak after impacting with harsh water spraying for 5 min confirming that the superhydrophilic coating on glass substrate is antiwater streak.

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“…Many researches pertaining to this subject have been reported and reviewed. 39 AFF effects were attributed to the fact that water molecules can be quickly adsorbed into the matrix of the film by interaction with polar and hydrogen-bond forming units on the cellulose chains. [11][12][13][14][15][16][17][18] Superhydrophobic surfaces by means of nanostructure or nanocomposite coatings have been exploited in anti-icing/antifrost applications owing to their excellent water-repellent properties that can delay the accumulation/adhesion of snow or ice onto the surface.…”

Section: Introductionmentioning

confidence: 99%

“…[35][36][37][38][39] For example, Lee et al assembled PVA/PAA multilayers and then post-treated with poly(ethylene glycol) methyl ether (PEG) to produce AFF coatings. By means of a hydrophilic/hydrophobic bilayer design, the prepared coatings demonstrated not only AFF property but also water resistibility.…”

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confidence: 99%

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Preparation of superhydrophilic nanosilica/polyacrylate hard coatings on plastic substrate for antifogging and frost‐resistant applications

Chang

Lin

Cheng

2019

J of Applied Polymer Sci

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A series of photosensitive hydrophilic agents (T20) comprising Tween-20, isophorone diisocyanate, and 2-hydroxyethyl methacrylate moieties were synthesized and used in the preparation of antifog/frost resistant (AFF) hard coatings on plastic substrates. By means of a hydrophilic/hydrophobic bilayer design, the prepared coatings demonstrated not only AFF property but also water resistibility. The bottom layer is an organic-inorganic composite consisting of SiO 2 nanoparticles embedded in a polymeric network of crosslinked dipentaethritol hexaacrylate. The AFF layer incorporates T20 in the formulations and links covalently with the bottom layer through a UV-curing polymerization process. Various methods, for example, FTIR, SEM, contact angle, and steam/defrosting tests, were employed to characterize the prepared coatings. Optimally, the coatings were found to be transparent, strong (4H, pencil hardness), adhering perfectly (level 5B) to the poly(methyl methacrylate) substrate, and could be soaked in water for 24 h at 25 C without losing hydrophilicity (contact angle~0 ) or antifogging capability.Recently, a new promising approach was reported which introduced the layer-by-layer (LBL) assembly technique to prepare coatings that demonstrated both antifogging and antifrosting effects. [35][36][37][38][39] For example, Lee et al. assembled PVA/PAA multilayers and then post-treated with poly(ethylene glycol) methyl ether (PEG) to produce AFF coatings. 37 The PEG segments were found to serve, in addition to PVA and PAA, as sites to absorb nonfreezing water and prevent formation Additional Supporting Information may be found in the online version of this article.

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Anti-fogging and anti-frosting behaviors of layer-by-layer assembled cellulose derivative thin film

Cited by 86 publications

References 33 publications

Zwitterionic polymer brush coatings with excellent anti-fog and anti-frost properties

Zwitterionic polymer brush coatings with excellent anti-fog and anti-frost properties

Superhydrophilic Smart Coating for Self-Cleaning Application on Glass Substrate

Preparation of superhydrophilic nanosilica/polyacrylate hard coatings on plastic substrate for antifogging and frost‐resistant applications

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