Abrasion-Resistant, Hot Water-Repellent and Self-Cleaning Superhydrophobic Surfaces Fabricated by Electrophoresis of Nanoparticles in Electrodeposited Sol-Gel Films

The commercial availability of inorganic/organic precursors for sol-gel formulations is very high and increases day by day. In textile applications, the precursor-synthesized sol-gels along with functional chemicals can be deposited onto textile fabrics in one step by rolling, padding, dip-coating, spraying or spin coating. By using this technology, it is possible to provide fabrics with functional/multi-functional characteristics including flame retardant, anti-mosquito, water- repellent, oil-repellent, anti-bacterial, anti-wrinkle, ultraviolet (UV) protection and self-cleaning properties. These surface properties are discussed, describing the history, basic chemistry, factors affecting the sol-gel synthesis, progress in sol-gel technology along with various parameters controlling sol-gel technology. Additionally, this review deals with the recent progress of sol-gel technology in textiles in addressing fabric finishing, water repellent textiles, oil/water separation, flame retardant, UV protection and self-cleaning, self-sterilizing, wrinkle resistance, heat storage, photochromic and thermochromic color changes and the improvement of the durability and wear resistance properties.

Download Full-text

HOT WATER-REPELLENT SUPERHYDROPHOBIC SURFACES WITH LONG-TERM STABILITY

Surface Review and Letters ◽

10.1142/s0218625x22500044 ◽

2021 ◽

Author(s):

JI SEONG CHOI ◽

SEONG MIN KANG

Keyword(s):

Hot Water ◽

Superhydrophobic Surfaces ◽

Water Repellent ◽

Water Droplets ◽

Long Term Stability ◽

Cassie State ◽

Potential Applications ◽

Different Temperatures ◽

Temperature Water

In this paper, we fabricate and evaluate superhydrophobic surfaces with mushroom-shaped microstructures. Using a silicon master and polymer microstructure patterning, polydimethylsiloxane (PDMS) surfaces bearing mushroom-shaped structures with five different spacing ratios are prepared and tested with water droplets of different temperatures. The fabricated PDMS surfaces demonstrate superhydrophobicity even to high-temperature water droplets with decreased surface tension. We compare the experimental data with the theoretical results calculated based on the Cassie state and Eötvös rule. Our work suggests potential applications to control wettability with liquids of various temperatures.

Download Full-text

Electrochemically generated sol–gel films as inhibitor containers of superhydrophobic surfaces for the active corrosion protection of metals

Journal of Materials Chemistry A ◽

10.1039/c5ta07443f ◽

2016 ◽

Vol 4 (2) ◽

pp. 649-656 ◽

Cited By ~ 53

Author(s):

Xue-Fen Zhang ◽

Rui-Jiao Chen ◽

Yan-Hua Liu ◽

Ji-Ming Hu

Keyword(s):

Corrosion Protection ◽

Sol Gel ◽

Superhydrophobic Surfaces ◽

Additional Function ◽

Sol Gel Films ◽

Protection Of Metals ◽

Active Corrosion

The present work shows a new contribution to the design of superhydrophobic surfaces with the additional function of active corrosion protection, through the encapsulation of inhibiting agents.

Download Full-text

SUPERHYDROPHOBIC SURFACES FOR WATER-REPELLENT OR SELF-CLEANING BEHAVIOR: CHEMICAL EFFECT

Surface Review and Letters ◽

10.1142/s0218625x09013281 ◽

2009 ◽

Vol 16 (05) ◽

pp. 645-652

Author(s):

Y. P. ZHOU ◽

Z. W. LIN ◽

J. BROWN

Keyword(s):

Contact Angle ◽

Thermodynamic Analysis ◽

Contact Angle Hysteresis ◽

Superhydrophobic Surfaces ◽

Chemical Effect ◽

Water Repellent ◽

Cleaning Behavior ◽

Self Cleaning ◽

Intrinsic Contact Angle

In this study, a thermodynamic analysis is conducted to investigate the chemical effect, in terms of intrinsic contact angle (CA), on the superhydrophobic behavior. It is theoretically revealed that the essential effect of intrinsic CA is to promote the composite transition. In particular, a large intrinsic CA more than 90° is necessary for such transition. Furthermore, for a pillar system with an intrinsic CA smaller than 90°, composite states are not impossible but is thermodynamically unstable. Once composite states are achieved, the advancing or maximum CA always approaches 180° whether an intrinsic CA is larger or smaller than 90°. In addition, the role of intrinsic CA in the water-repellent or self-cleaning behavior such as contact angle hysteresis (CAH) and equilibrium CA has been discussed in detail.

Download Full-text

Development of hybrid hydrophobic molybdenum disulfide (MoS2) nanoparticles for super water repellent self-cleaning

Progress in Organic Coatings ◽

10.1016/j.porgcoat.2021.106161 ◽

2021 ◽

Vol 153 ◽

pp. 106161

Author(s):

Eunjoo Koh ◽

Yong Taek Lee

Keyword(s):

Molybdenum Disulfide ◽

Water Repellent ◽

Self Cleaning ◽

Mos2 Nanoparticles

Download Full-text

Sol-gel synthesis of textured lanthanum titanate thin films

Journal of Materials Research ◽

10.1557/jmr.2003.0046 ◽

2003 ◽

Vol 18 (2) ◽

pp. 357-362 ◽

Cited By ~ 12

Author(s):

Mary M. Sandstrom ◽

Paul Fuierer

Keyword(s):

Thin Films ◽

Sol Gel ◽

Precursor Solution ◽

Solution Concentration ◽

Optical Measurements ◽

Layered Perovskite ◽

Orientation Factor ◽

Anisotropic Structures ◽

Sol Gel Films ◽

Sol Gel Synthesis

Control over crystallographic orientation in thin films is important, particularly with highly anisotropic structures. Because of its ferroelectric nature, the layered perovskite La2Ti2O7 has interesting piezoelectric and electrooptic properties that may be exploited when films are highly textured. Sol-gel films with an orientation factor of greater than 95% were fabricated without relying on epitaxial (lattice-matching) growth from the substrate. Film orientation and crystallization were confirmed by x-ray diffraction, scanning electron microscopy, atomic force microscopy, and optical measurements. The particle sizes in all precursor solutions were measured by dynamic light scattering experiments. Experimental results indicate that film orientation is a function of precursor solution concentration, size of the molecular clusters in the solution, and film thickness.

Download Full-text