Self‐structured serrated edges of chemically oxidized poly(dimethylsiloxane) disks
| Autor: | Kensuke Shinoda, Masashi Watanabe |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Polymers and Plastics Drop (liquid) Vulcanization Sulfuric acid General Chemistry Elastomer Surfaces Coatings and Films law.invention chemistry.chemical_compound chemistry Nitric acid law Materials Chemistry medicine Self-assembly Swelling medicine.symptom Composite material Prepolymer |
| Zdroj: | Journal of Applied Polymer Science. 131 |
| ISSN: | 1097-4628 0021-8995 |
| Popis: | Serrated structures on a micrometer scale were spontaneously formed along the edge of a poly(dimethylsiloxane) (PDMS) disk using the following procedure. First, a drop of PDMS prepolymer was placed on a glass slide, followed by vulcanization. Second, the obtained PDMS disk was soaked in a mixture of sulfuric acid and nitric acid to form a serrated structure. Consideration of the mechanism of the structure formation was based on the following results. (1) The acid oxidized the PDMS surface, which was then swollen with the acid mixture or water to form wrinkles. (2) The wrinkle wavelength depended on the thickness of the PDMS film. (3) The thickness of the PDMS disk varied near its edge because the meniscus of the drop of the PDMS prepolymer was retained after the vulcanization. These results suggest that the thickness gradient of the PDMS disk led to the spontaneous formation of a serrated edge structure. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40767. |
| Databáze: | OpenAIRE |
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