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| Naji, M. |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Azam, Siraj |
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| Ali, M. A. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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Koenig, Meike
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Publications (5/5 displayed)
- 2024Photo‐Arbuzov Reactions as a Broadly Applicable Surface Modification Strategycitations
- 2020Molecular Changes in Vapor‐Based Polymer Thin Films Assessed by Characterization of Swelling Properties of Amine‐Functionalized Poly‐p-xylylene
- 2017Defects as Color Centers: The Apparent Color of Metal–Organic Frameworks Containing Cu2+-Based Paddle-Wheel Unitscitations
- 2017pH-responsive aminomethyl functionalized poly(p-xylylene) coatings by chemical vapor deposition polymerizationcitations
- 2014Nanocomposite coatings with stimuli-responsive catalytic activitycitations
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article
pH-responsive aminomethyl functionalized poly(p-xylylene) coatings by chemical vapor deposition polymerization
Abstract
The preparation of stimuli-responsive aminomethyl functionalized poly(p-xylylene) coatings by chemical vapor deposition polymerization is reported. Modification of the paracyclophane precursor with ionizable aminomethyl groups leads to polymer coatings with pH-responsive swelling properties. The swelling behavior is monitored in situ using spectroscopic ellipsometry and additional streaming potential measurements are performed. With decreasing pH-value, the coating becomes increasingly charged and reversibly swells to several times its dry thickness. The swelling ratio is sensitive to the ionic strength of the solution. By using a mixture of unfunctionalized and functionalized precursors in the chemical vapor deposition process, the number of charges in the polymer layer can be tuned and with it the swelling ratio of the coating. As a proof-of-concept for possible applications, a commercial paper filter is coated. This results in a pH-dependent wetting behavior and pH-dependent transport through the capillaries of the paper.