The wear resistance and transparency properties of superhydrophobicity are most important issue essential for the application of superhydrophobic materials in industry. In this paper, we successfully prepared good wear resistance PU/SiO2 (polyurethane/silica) composite superhydrophobic coating with the double-step sol–gel route. The PU and SiO2 coating occurs crosslinking reaction forming composite superhydrophobic coating. The superhydrophobic coating surface is characterised by environmental scanning electron microscope and other testing methods, the results show that the PU/SiO2 composite superhydrophobic coating surface has excellent superhydrophobic properties and the Sa value was 332.5 nm. We used the pressure of 5 KPa to verify the wear resistance which the PU/SiO2 composite superhydrophobic coating surface exhibits good wear resistance, the water contact angle (WCA) still remains 138.7° after the abrasion resistance test. The PU/SiO2 composite superhydrophobic coating has high transparency in the visible light. The largest WCA of PU/SiO2 composite superhydrophobic coating could reach 162.1°.
FengL, LiS, LiY, . Super–hydrophobic surfaces: from natural to artificial. Adv Mater. 2002;14(24):1857–1860. doi: 10.1002/adma.200290020
2.
FengXJ, JiangL.Design and creation of superwetting/antiwetting surfaces. Adv Mater. 2006;18(23):3063–3078. doi: 10.1002/adma.200501961
3.
GenzerJ, EfimenkoK.Recent developments in superhydrophobic surfaces and their relevance to marine fouling: a review. Biofouling. 2006;22(5):339–360. doi: 10.1080/08927010600980223
4.
ZhangX, ShiF, NiuJ, . Superhydrophobic surfaces: from structural control to functional application. J Mater Chem. 2008;18(6):621–633. doi: 10.1039/B711226B
5.
YuHB, LiRF.Preparation and properties of biomimetic superhydrophobic composite coating. Surf Eng. 2016;32(2):79–84. doi: 10.1179/1743294414Y.0000000301
6.
BhushanB, JungYC, NiemietzA, . Lotus-like biomimetic hierarchical structures developed by the self-assembly of tubular plant waxes. Langmuir. 2009;25(3):1659–1666. doi: 10.1021/la802491k
7.
FürstnerR, BarthlottW, NeinhuisC, . Wetting and self-cleaning properties of artificial superhydrophobic surfaces. Langmuir. 2005;21(3):956–961. doi: 10.1021/la0401011
8.
BhushanB, JungYC, KochK.Micro-, nano- and hierarchical structures for superhydrophobicity, self-cleaning and low adhesion. Philos Trans R Soc London A: Math Phys Eng Sci. 2009;367(1894):1631–1672. doi: 10.1098/rsta.2009.0014
9.
LuY, SathasivamS, SongJ, . Robust self-cleaning surfaces that function when exposed to either air or oil. Science. 2015;347(6226):1132–1135. doi: 10.1126/science.aaa0946
10.
ZorbaV, StratakisE, BarberoglouM, . Biomimetic artificial surfaces quantitatively reproduce the water repellency of a lotus leaf. Adv Mater. 2008;20(21):4049–4054. doi: 10.1002/adma.200800651
11.
OgiharaH, XieJ, OkagakiJ, . Simple method for preparing superhydrophobic paper: spray-deposited hydrophobic silica nanoparticle coatings exhibit high water-repellency and transparency. Langmuir. 2012;28(10):4605–4608. doi: 10.1021/la204492q
12.
ZhangH, LambRN.Superhydrophobic treatment for textiles via engineering nanotextured silica/polysiloxane hybrid material onto fibres. Surf Eng. 2009;25(1):21–24. doi: 10.1179/174329408X271390
13.
RuanM, LiW, WangB, . Preparation and anti-icing behavior of superhydrophobic surfaces on aluminum alloy substrates. Langmuir. 2013;29(27):8482–8491. doi: 10.1021/la400979d
14.
WangCF, LinSJ.Robust superhydrophobic/superoleophilic sponge for effective continuous absorption and expulsion of oil pollutants from water. ACS Appl Mater Interf. 2013;5(18):8861–8864. doi: 10.1021/am403266v
15.
ZhangJ, SeegerS.Polyester materials with superwetting silicone nanofilaments for oil/water separation and selective oil absorption. Adv Func Mater. 2011;21(24):4699–4704. doi: 10.1002/adfm.201101090
16.
DunderdaleGJ, UrataC, SatoT, . Continuous, high-speed and efficient oil/water separation using meshes with antagonistic wetting properties. ACS Appl Mater Interf. 2015;7(34):18915–18919. doi: 10.1021/acsami.5b06207
17.
WuL, LiL, LiB, . Magnetic, durable, and polyurethane@ Fe3O4@ SiO2@ fluoropolymer sponges for selective oil absorption and oil/water superhydrophobic separation. ACS Appl Mater Interf. 2015;7(8):4936–4946. doi: 10.1021/am5091353
18.
DanielloRJ, WaterhouseNE, RothsteinJP.Drag reduction in turbulent flows over superhydrophobic surfaces. Phys Fluids (1994-present). 2009;21(8):085103. doi: 10.1063/1.3207885
19.
SrinivasanS, KleingartnerJA, GilbertJB, . Sustainable drag reduction in turbulent Taylor-Couette flows by depositing sprayable superhydrophobic surfaces. Phys Rev Lett. 2015;114(1):014501. doi: 10.1103/PhysRevLett.114.014501
20.
DongH, ChengM, ZhangY, . Extraordinary drag-reducing effect of a superhydrophobic coating on a macroscopic model ship at high speed. J Mater Chem A. 2013;1(19):5886–5891. doi: 10.1039/c3ta10225d
RamezaniM, VaeziMR, KazemzadehA.Preparation of silane-functionalized silica films via two-step dip coating sol–gel and evaluation of their superhydrophobic properties. Appl Surf Sci. 2014;317:147–153. doi: 10.1016/j.apsusc.2014.08.095
23.
XuL, KarunakaranRG, GuoJ, . Transparent, superhydrophobic surfaces from one-step spin coating of hydrophobic nanoparticles. ACS Appl Mater Interf. 2012;4(2):1118–1125. doi: 10.1021/am201750h
24.
HuangYF, HuangC, ZhongYL, . Preparing superhydrophobic surfaces with very low contact angle hysteresis. Surf Eng. 2013;29(8):633–636. doi: 10.1179/1743294412Y.0000000087
25.
Venkateswara RaoA, LattheSS, NadargiDY, . Preparation of MTMS based transparent superhydrophobic silica films by sol–gel method. J Colloid Interf Sci. 2009;332(2):484–490. doi: 10.1016/j.jcis.2009.01.012
26.
GuoYB, YangL, WangDG.Preparation and hydrophobic behaviours of polystyrene composite coating. Surf Eng. 2016;32(2):95–101. doi: 10.1179/1743294415Y.0000000016
27.
MancaM, CannavaleA, De MarcoL, . Durable superhydrophobic and antireflective surfaces by trimethylsilanized silica nanoparticles-based sol−gel processing. Langmuir. 2009;25(11):6357–6362. doi: 10.1021/la804166t
28.
EbertD, BhushanB.Transparent, superhydrophobic, and wear-resistant coatings on glass and polymer substrates using SiO2, ZnO, and ITO nanoparticles. Langmuir. 2012;28(31):11391–11399. doi: 10.1021/la301479c
29.
HuovinenE, HirviJ, SuvantoM, . Micro–micro hierarchy replacing micro–nano hierarchy: a precisely controlled way to produce wear-resistant superhydrophobic polymer surfaces. Langmuir. 2012;28(41):14747–14755. doi: 10.1021/la303358h
30.
KeQ, FuW, JinH, . Fabrication of mechanically robust superhydrophobic surfaces based on silica micro-nanoparticles and polydimethylsiloxane. Surf Coat Technol. 2011;205(21):4910–4914. doi: 10.1016/j.surfcoat.2011.04.073
