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Zwitterionic Nanofibers of Super-Glue for Transparent and Biocompatible Multi-Purpose Coatings.

Mele E, Heredia-Guerrero JA, Bayer IS, Ciofani G, Genchi GG, Ceseracciu L, Davis A, Papadopoulou EL, Barthel MJ, Marini L, Ruffilli R, Athanassiou A - Sci Rep (2015)

Bottom Line: The resulting fibrous networks are thermally treated on glass in order to create transparent coatings whose superficial morphology recalls the organization of the initial electrospun mats.The inherent texture of the coatings positively affects their biocompatibility.In fact, they are able to promote the proliferation and differentiation of myoblast stem cells.

View Article: PubMed Central - PubMed

Affiliation: Smart Materials, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genoa, Italy.

ABSTRACT
Here we show that macrozwitterions of poly(ethyl 2-cyanoacrylate), commonly called Super Glue, can easily assemble into long and well defined fibers by electrospinning. The resulting fibrous networks are thermally treated on glass in order to create transparent coatings whose superficial morphology recalls the organization of the initial electrospun mats. These textured coatings are characterized by low liquid adhesion and anti-staining performance. Furthermore, the low friction coefficient and excellent scratch resistance make them attractive as solid lubricants. The inherent texture of the coatings positively affects their biocompatibility. In fact, they are able to promote the proliferation and differentiation of myoblast stem cells. Optically-transparent and biocompatible coatings that simultaneously possess characteristics of low water contact angle hysteresis, low friction and mechanical robustness can find application in a wide range of technological sectors, from the construction and automotive industries to electronic and biomedical devices.

No MeSH data available.


Related in: MedlinePlus

Anti-staining performances of the PECA textured coatings.(a) Experimental data (grey circles) of the cosine of the contact angle as function of the surface tension of the analyzed liquids. The solid line is the best linear fit of the data. (b) Experimental data (grey circles) of the contact angle hysteresis as function of the sliding angle. (c) Photograph of drops of water impacting and sliding on two glass substrates: one coated with the thermally treated PECA fibers (sample on the right) and the other one uncoated (sample on the left). Scale bar = 0.5 cm. (d) Temporal sequence showing a double-side coated glass substrate pulled out from a water bath. The water was colored in red for visualization purposes. Scale bar = 0.5 cm.
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f4: Anti-staining performances of the PECA textured coatings.(a) Experimental data (grey circles) of the cosine of the contact angle as function of the surface tension of the analyzed liquids. The solid line is the best linear fit of the data. (b) Experimental data (grey circles) of the contact angle hysteresis as function of the sliding angle. (c) Photograph of drops of water impacting and sliding on two glass substrates: one coated with the thermally treated PECA fibers (sample on the right) and the other one uncoated (sample on the left). Scale bar = 0.5 cm. (d) Temporal sequence showing a double-side coated glass substrate pulled out from a water bath. The water was colored in red for visualization purposes. Scale bar = 0.5 cm.

Mentions: One interesting characteristic of the produced PECA coatings is their self-cleaning ability. The solid surface energy of the coatings was estimated using different liquids (tricresyl phosphate, DMSO, diethylene glycol, bromonaphtaline, ethylene glycol, diiodomethane, formamide, glycerol) and mixtures of water and ethanol (further details in Table S1 of the Supplementary Information). The plot in Fig. 4a shows the value of the cosine of the measured contact angle (cos θ) as a function of the surface tension of the liquid used. For the cases of incomplete wetting (liquids with finite contact angles), the data were fitted with a line. Its intercept at cos θ = 1 is regarded as the estimated solid surface energy for the PECA coatings, which was equal to 33 mN/m. Indeed, this value indicates a hydrophilic surface with a water contact angle of about 65°. Interestingly, the water droplets started sliding once the substrates were tilted to 40° (sliding angle α) with a constant contact angle hysteresis (Δθ) of approximately 24°, as shown in Fig. 4b. In fact, when the water drops impacted on the coating (sample on the right in Fig. 4c) they slid away without leaving any trace of liquid behind them. On the contrary, as expected, the uncoated glass substrate was easily wet by water (sample on the left in Fig. 4c). A further demonstration of the anti-staining performance of the PECA textured coatings is shown in Fig. 4d, where a glass substrate with both sides coated was dipped in a bath of water (colored red). When the sample was pulled away from the water, both surfaces appeared completely dry.


Zwitterionic Nanofibers of Super-Glue for Transparent and Biocompatible Multi-Purpose Coatings.

Mele E, Heredia-Guerrero JA, Bayer IS, Ciofani G, Genchi GG, Ceseracciu L, Davis A, Papadopoulou EL, Barthel MJ, Marini L, Ruffilli R, Athanassiou A - Sci Rep (2015)

Anti-staining performances of the PECA textured coatings.(a) Experimental data (grey circles) of the cosine of the contact angle as function of the surface tension of the analyzed liquids. The solid line is the best linear fit of the data. (b) Experimental data (grey circles) of the contact angle hysteresis as function of the sliding angle. (c) Photograph of drops of water impacting and sliding on two glass substrates: one coated with the thermally treated PECA fibers (sample on the right) and the other one uncoated (sample on the left). Scale bar = 0.5 cm. (d) Temporal sequence showing a double-side coated glass substrate pulled out from a water bath. The water was colored in red for visualization purposes. Scale bar = 0.5 cm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4566136&req=5

f4: Anti-staining performances of the PECA textured coatings.(a) Experimental data (grey circles) of the cosine of the contact angle as function of the surface tension of the analyzed liquids. The solid line is the best linear fit of the data. (b) Experimental data (grey circles) of the contact angle hysteresis as function of the sliding angle. (c) Photograph of drops of water impacting and sliding on two glass substrates: one coated with the thermally treated PECA fibers (sample on the right) and the other one uncoated (sample on the left). Scale bar = 0.5 cm. (d) Temporal sequence showing a double-side coated glass substrate pulled out from a water bath. The water was colored in red for visualization purposes. Scale bar = 0.5 cm.
Mentions: One interesting characteristic of the produced PECA coatings is their self-cleaning ability. The solid surface energy of the coatings was estimated using different liquids (tricresyl phosphate, DMSO, diethylene glycol, bromonaphtaline, ethylene glycol, diiodomethane, formamide, glycerol) and mixtures of water and ethanol (further details in Table S1 of the Supplementary Information). The plot in Fig. 4a shows the value of the cosine of the measured contact angle (cos θ) as a function of the surface tension of the liquid used. For the cases of incomplete wetting (liquids with finite contact angles), the data were fitted with a line. Its intercept at cos θ = 1 is regarded as the estimated solid surface energy for the PECA coatings, which was equal to 33 mN/m. Indeed, this value indicates a hydrophilic surface with a water contact angle of about 65°. Interestingly, the water droplets started sliding once the substrates were tilted to 40° (sliding angle α) with a constant contact angle hysteresis (Δθ) of approximately 24°, as shown in Fig. 4b. In fact, when the water drops impacted on the coating (sample on the right in Fig. 4c) they slid away without leaving any trace of liquid behind them. On the contrary, as expected, the uncoated glass substrate was easily wet by water (sample on the left in Fig. 4c). A further demonstration of the anti-staining performance of the PECA textured coatings is shown in Fig. 4d, where a glass substrate with both sides coated was dipped in a bath of water (colored red). When the sample was pulled away from the water, both surfaces appeared completely dry.

Bottom Line: The resulting fibrous networks are thermally treated on glass in order to create transparent coatings whose superficial morphology recalls the organization of the initial electrospun mats.The inherent texture of the coatings positively affects their biocompatibility.In fact, they are able to promote the proliferation and differentiation of myoblast stem cells.

View Article: PubMed Central - PubMed

Affiliation: Smart Materials, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genoa, Italy.

ABSTRACT
Here we show that macrozwitterions of poly(ethyl 2-cyanoacrylate), commonly called Super Glue, can easily assemble into long and well defined fibers by electrospinning. The resulting fibrous networks are thermally treated on glass in order to create transparent coatings whose superficial morphology recalls the organization of the initial electrospun mats. These textured coatings are characterized by low liquid adhesion and anti-staining performance. Furthermore, the low friction coefficient and excellent scratch resistance make them attractive as solid lubricants. The inherent texture of the coatings positively affects their biocompatibility. In fact, they are able to promote the proliferation and differentiation of myoblast stem cells. Optically-transparent and biocompatible coatings that simultaneously possess characteristics of low water contact angle hysteresis, low friction and mechanical robustness can find application in a wide range of technological sectors, from the construction and automotive industries to electronic and biomedical devices.

No MeSH data available.


Related in: MedlinePlus