Durable, robust and free-standing superhydrophobic poly(vinyl alcohol- co -ethylene) nanofiber membrane

Gurav, Annaso B.; Guo, Qian‐Hui; Tao, Yifei; Mei, Tao; Wang, Yuan; Wang, Dong

doi:10.1016/j.matlet.2016.06.086

Cited by 14 publications

(15 citation statements)

References 14 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…26 Also, hydroxyl acrylic resin could play a stabilizing role between hydrophobic modied SiO 2 and substrates. 27 Besides, PVA, 28,29 PDMS, 30,31 double-sided tape, 32 and PVDF 33 were involved in the enhancements of superhydrophobic surfaces.…”

Section: Introductionmentioning

confidence: 99%

A facile preparation of superhydrophobic L-CNC-coated meshes for oil–water separation

Huang

et al. 2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

A facile preparation of superhydrophobic L-CNC-coated meshes for oil–water separation

Huang

et al. 2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Through hydrophobic modification, stable ternary ANFs/PVA/PFOTES composite aerogels are obtained. The peaks that appear at 1235 and 1430 cm −1 are attributed to the stretching vibrations of CF bond in the CF 2 and CF 3 groups, and the peaks between 700 and 800 cm − 1 are due to the stretching vibration of SiO groups 26,27 . Compared to the COH peak in ANFs/PVA aerogels at 1092 cm −1 , the modified aerogels give broader peaks as the hydrophobic modification time increased from 1 to 8 h (T‐1–T‐4), which can be attributed to the overlapping of SiOSi at about 1100 cm −1 with the COH and the interference of CO stretching movement with asymmetric SiOSi stretching.…”

Section: Resultsmentioning

confidence: 99%

“…The peaks that appear at 1235 and 1430 cm À1 are attributed to the stretching vibrations of C F bond in the CF 2 and CF 3 groups, and the peaks between 700 and 800 cm À1 are due to the stretching vibration of Si O groups. 26,27 Compared to the C OH peak in ANFs/PVA aerogels at 1092 cm À1 , the modified aerogels give broader peaks as the hydrophobic modification time increased from 1 to 8 (T-1-T-4), which can be attributed to the overlapping of Si O Si at about 1100 cm À1 with the C OH and the interference of C O stretching movement with asymmetric Si O Si stretching. The shoulder on the Si O Si peaks at around 1109 cm À1 may be attributed to the presence of a Si O C bond, which indicates the formation of a new Si O C bond in the ANFs/PVA/PFOTES composite aerogels.…”

Section: Hydrophobic Modification Of Anfs/ Pva Aerogelsmentioning

confidence: 99%

Robust hydrophobic modification of para‐aramid nanofibers/polyvinyl alcohol composite aerogels with 1H,1H,2H,2H‐perfluorooctyltriethoxysilane

Ren

Hasuo

Tabata

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

Aerogels are frequently exposed to moisture or come into direct contact with water in real-world applications, posing a threat to their stable performance. Herein, based on the characteristic that the liquid phase can efficiently diffuse in the solid cross-linked network of gels, a robust hydrophobic modification approach for paraaramid nanofibers/polyvinyl alcohol (ANFs/PVA) composite aerogels with 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PFOTES) is demonstrated. The type of solvent, the concentration of hydrochloric acid (HCl) required promoting PFOTES hydrolysis, and the treatment time for hydrophobic modification are discussed individually. The ANFs/PVA/PFOTES aerogels with a water contact angle of 131.0 were obtained through supercritical fluid drying employing acetone as the solvent, with a concentration of 0.1 mol/L HCl of 0.35 vol%, and a treatment duration of 2 h. The hydrogen bond between ANFs and PVA, and the grafting of PFOTES on PVA have both been verified by Fourier-transform infrared spectroscopy. The porous structure of the modified aerogels was improved simultaneously, according to scanning electron microscope and Brunauer-Emmett-Teller characterizations.With the help of a thermal imaging camera, ANFs/PVA/PFOTES aerogels exhibit stable thermal insulation capability in low temperature and humid environments, which holds great promise for a wide range of applications.

show abstract

“…Indeed, such reaction results in the substitution of the ethoxy groups (C 2 H 5 ) by OH groups, leaving in the material structure only the CH 2 groups of the non‐hydrolysable carbonic chain of the PFOTES precursor, which has predominance of C―F bonds. These C―F bonds present asymmetric and symmetric axial deformation bands located at 1234, 1189, 1141, 1119, 897, 698, and 650 cm −1 belonging to the CF 2 and CF 3 groups. Due to the multiplicity of bands referring to the presence of C―F bonds, especially in the region of 1250 to 950 cm −1 , the bands indexing the presence of Si―O―Si bonds is compromised.…”

Section: Resultsmentioning

confidence: 99%

Easy functionalization process applied to develop super‐hydrophobic and oleophobic properties on ASTM 1200 aluminum surface

Carneiro

Ferreira

Houmard

2018

Surface & Interface Analysis

View full text Add to dashboard Cite

Funding information FAPEMIG; CNPqSuper-hydrophobic and oleophobic surfaces on ASTM 1200 H14 aluminum alloy substrates were achieved by chemical etching followed by deposition of organically modified silicate (ORMOSIL) coatings synthesized through sol-gel method. The chemical etching using FHH solutions (FeCl 3 + HCl + H 2 O 2 ) was adapted for the studied aluminum alloy by varying the concentration of iron (III) chloride and the etching time in order to increase the surface roughness of the material. This chemical etching produces rough surfaces exhibiting superficial square pores with edges about 1 to 2 μm. The chemical modifications with ORMOSIL solutions based on 1H,1H,2H,2Hperfluorooctyltriethoxysilane (PFOTES) and hexadecyltrimethoxysilane sol-gel precursors induced water contact angles about 154°and 150°, respectively, and sliding angles smaller than 5°, on the previously optimized etched surface. Moreover, the surface modification with ORMOSIL based on PFOTES reached also an oleophobic character with an oil contact angle about 136°due to air entrapment in the surface roughness at the oil-aluminum interface. Finally, ORMOSIL coatings produced with varied concentrations of PFOTES and tetraethoxyorthosilane precursors proved that the super-hydrophobic and oleophobic properties can be maintained with an important decrease of the PFOTES precursor, which should significantly decrease the cost production of such functional surfaces and could favour its mechanical durability.

show abstract

Durable, robust and free-standing superhydrophobic poly(vinyl alcohol- co -ethylene) nanofiber membrane

Cited by 14 publications

References 14 publications

A facile preparation of superhydrophobic L-CNC-coated meshes for oil–water separation

A facile preparation of superhydrophobic L-CNC-coated meshes for oil–water separation

Robust hydrophobic modification of para‐aramid nanofibers/polyvinyl alcohol composite aerogels with 1H,1H,2H,2H‐perfluorooctyltriethoxysilane

Easy functionalization process applied to develop super‐hydrophobic and oleophobic properties on ASTM 1200 aluminum surface

Contact Info

Product

Resources

About