Rational design of perfluorocarbon-free oleophobic textiles

Shabanian, Sadaf; Khatir, Behrooz; Nisar, Ambreen; Golovin, Kevin

doi:10.1038/s41893-020-0591-9

Cited by 48 publications

(35 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to its demonstrated robustness, the dyn-PDMS film is also fluorine-free, which leads to greater environmental friendliness owing to lower bioaccumulation when compared to PFCs, which can take hundreds of years to degrade 11 . Silicone-based materials can be recycled and reused using organic solvents such as toluene 40 .…”

Section: Discussionmentioning

confidence: 99%

“…The majority of engineering materials such as pure metals, alloys, ceramics, and semiconductors are intrinsically hydrophilic. Therefore, achieving stable hydrophobicity with these materials relies on developing hydrophobic coatings, which are commonly made from perfluoro-compounds (PFCs) due to their low surface energy (5-20 mJ•m −2 ) 11 . However, PFC coatings are not able to achieve long-term hydrophobicity (1-year long lifetime) for many applications because they lack mechanical robustness [12][13][14][15] .…”

mentioning

confidence: 99%

“…When deposited on a roughened aluminum surface, the dyn-PDMS coating also demonstrates superhydrophobicity. The PDMS vitrimer coating developed here is also relatively environmentally friendly compared to well-documented environmental and health concerns from fluorine-based chemistry 11,38,39 . In contrast to previous work that achieves thick durable hydrophobic coatings by passively stacking protective structures, our work represents a method to manufacture ultra-thin and durable hydrophobic films.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Ultra-thin self-healing vitrimer coatings for durable hydrophobicity

et al. 2021

View full text Add to dashboard Cite

Durable hydrophobic materials have attracted considerable interest in the last century. Currently, the most popular strategy to achieve hydrophobic coating durability is through the combination of a perfluoro-compound with a mechanically robust matrix to form a composite for coating protection. The matrix structure is typically large (thicker than 10 μm), difficult to scale to arbitrary materials, and incompatible with applications requiring nanoscale thickness such as heat transfer, water harvesting, and desalination. Here, we demonstrate durable hydrophobicity and superhydrophobicity with nanoscale-thick, perfluorinated compound-free polydimethylsiloxane vitrimers that are self-healing due to the exchange of network strands. The polydimethylsiloxane vitrimer thin film maintains excellent hydrophobicity and optical transparency after scratching, cutting, and indenting. We show that the polydimethylsiloxane vitrimer thin film can be deposited through scalable dip-coating on a variety of substrates. In contrast to previous work achieving thick durable hydrophobic coatings by passively stacking protective structures, this work presents a pathway to achieving ultra-thin (thinner than 100 nm) durable hydrophobic films.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Ultra-thin self-healing vitrimer coatings for durable hydrophobicity

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Water repellency is a desired feature of fabrics in the manufacture of raincoats, hostelry, wet‐suits, tarpaulin, table cloth, shower curtain, and so on where water repellency enables self‐cleaning, thus reducing maintenance costs 20,21 . There are various processes to impart superhydrophobicity to fabrics, where the simplest one is coating fabrics with hydrophobic molecules, like fluorocarbons, silanes, and silicones or waxes 22,23 .…”

Section: Introductionmentioning

confidence: 99%

“…[15][16][17][18][19] Water repellency is a desired feature of fabrics in the manufacture of raincoats, hostelry, wet-suits, tarpaulin, table cloth, shower curtain, and so on where water repellency enables self-cleaning, thus reducing maintenance costs. 20,21 There are various processes to impart superhydrophobicity to fabrics, where the simplest one is coating fabrics with hydrophobic molecules, like fluorocarbons, silanes, and silicones or waxes. 22,23 This coating approach is feasible since fabric surfaces are intrinsically textured, displaying roughness, whereas the hydrophobic molecules provide low surface energy, therefore completing the two necessary conditions for achieving superhydrophobicity.…”

Section: Introductionmentioning

confidence: 99%

Robust superhydrophobic fabrics by infusing structured polydimethylsiloxane films

Çelik

Torun

Ruzi

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Superhydrophobic coatings have large application potential in self‐cleaning textiles. Low durability, high cost of fabrication, and environmental concerns over the usage of chemicals such as fluorocarbons limit the utilization of superhydrophobic coatings. This study reports a convenient and inexpensive approach to fabricate robust and fluorine‐free superhydrophobic fabrics based on the transfer of structured polymer films and hydrophobic nanoparticles. In this approach, polydimethylsiloxane (PDMS) is infused between sheets of fabric and paper, followed by curing and removal of the paper. This process results in a fabric infused with PDMS whose structure is a negative replica of the paper surface. Then, hydrophobic nanoparticles are sprayed onto the structured PDMS side of the fabric. The infusion of PDMS and subsequent deposition of the hydrophobic nanoparticles enables strong bonding, as shown by the excellent solvent stability of the superhydrophobic fabric under ultrasonication. The proposed approach is universal in that it can be applied to almost any textiles, which upon coating, exhibited superhydrophobicity with a water contact angle of 172° and a sliding angle of 3°. Furthermore, the superhydrophobic fabric showed robust durability against water spray impact and mechanical bending where it can keep superhydrophobicity for at least 200 cycles of each test.

show abstract

Double‐Defense Design of Super‐Anti‐Fouling Membranes for Oil/Water Emulsion Separation

Dong

Zhu

Fang

et al. 2022

Adv Funct Materials

170

View full text Add to dashboard Cite

Oil fouling threatens the water flux stability of membranes for oil/water separation. Simple hydrophilic modification fights for an opportunity to prevent oil contamination but fails to eliminate severe water flux decline. In essence, a “single‐defense” mechanism is insufficient to build a potent barrier against accumulated cake layer under a filtration environment. This work reports a “double‐defense” design by integrating hydrophilic polymer brushes and hydrogel layer on oil/water separation membranes for desired anti‐oil‐fouling property, where a poly(vinylidene fluoride) porous membrane is first covered by a layer of poly(hydroxyethyl methylacrylate) hydrogel and then controllably grafted with poly(sulfobetaine) brushes. The spatially hierarchical structure establishes a highly covered “double‐defense” barrier for the membrane surface to efficiently repel oil adhesion and the formation of an accumulated cake layer. When separating various surfactant‐stabilized oil‐in‐water emulsions, the permeating flux displays a nearly zero decline throughout the whole filtration period. Most importantly, the permeating flux of the membrane is almost the same when filtrating pure water and filtrating oil‐in‐water emulsions, which is difficult to be achieved by the general membranes, indicating that the membrane has excellent anti‐oil‐fouling property superior to the currently reported membranes.

show abstract

Rational design of perfluorocarbon-free oleophobic textiles

Cited by 48 publications

References 38 publications

Ultra-thin self-healing vitrimer coatings for durable hydrophobicity

Ultra-thin self-healing vitrimer coatings for durable hydrophobicity

Robust superhydrophobic fabrics by infusing structured polydimethylsiloxane films

Double‐Defense Design of Super‐Anti‐Fouling Membranes for Oil/Water Emulsion Separation

Contact Info

Product

Resources

About