6533b82efe1ef96bd1293c72
RESEARCH PRODUCT
Grafting Silicone at Room Temperature—a Transparent, Scratch-resistant Nonstick Molecular Coating
Doris VollmerHans-jürgen ButtPhilipp BaumliHannu TeisalaStefan A. L. WeberStefan A. L. Webersubject
Materials science02 engineering and technologyengineering.material010402 general chemistry01 natural sciencesArticlechemistry.chemical_compoundSiliconeCoatingElectrochemistryGeneral Materials ScienceComposite materialSilicon oxideSpectroscopycomputer.programming_languageInertPolydimethylsiloxaneSurfaces and Interfaces021001 nanoscience & nanotechnologyCondensed Matter PhysicsGrafting0104 chemical scienceschemistryScratchengineeringSurface modification0210 nano-technologycomputerdescription
Silicones are usually considered to be inert and, thus, not reactive with surfaces. Here we show that the most common silicone, methyl-terminated polydimethylsiloxane, spontaneously and stably bonds on glass-and any other material with silicon oxide surface chemistry-even at room temperature. As a result, a 2-5 nm thick and transparent coating, which shows extraordinary nonstick properties toward polar and nonpolar liquids, ice, and even super glue, is formed. Ten microliter drops of various liquids slide off a coated glass when the sample is inclined by less than 10°. Ice adhesion strength on a coated glass is only 2.7 ± 0.6 kPa, that is, more than 98% less than ice adhesion on an uncoated glass. The mechanically stable coating can be easily applied by painting, spraying, or roll-coating. Notably, the reaction does not require any excess energy or solvents, nor does it induce hazardous byproducts, which makes it an ideal option for environmentally sustainable surface modification in a myriad of technological applications.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-04-01 | Langmuir |