Bis(trifluoromethyl)carbinol polynorbornene as a pseudo-polyelectrolyte in multilayered films |
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Authors: | Ronny Priefer Kelly SowersTodd D. Krauss Megan E. McGahanThomas W. Smith |
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Affiliation: | a College of Pharmacy, Western New England University, Springfield, MA 01119, USAb Department of Chemistry, Biochemistry, and Physics, Niagara University, Niagara University, NY 14109, USAc Department of Chemistry, University of Rochester, Rochester, NY 14627, USAd Department of Chemistry, Rochester Institute of Technology, Rochester, NY 14623, USA |
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Abstract: | Using weak, opposed to strong polyelectrolytes in multilayer polymer systems provides a convenient means of altering some of the physico-chemical properties of these thin films. Recently, we pushed the limits of the weak polyacids by the introduction of an additional class of polyelectrolytes, the pseudo-polyelectrolytes (pPE). This paper focuses on another pPE, poly[5-(2-trifluoromethyl-1,1,1-trifluoro-2-hydroxypropyl)-2-norbornene] (PNBHFA). As, with poly(4-vinylphenol), multilayer assembly with both a weak and a strong polycation was accomplished from aqueous media. However, this was achieved only at a high pH value of 12.0. The films that were produced were exceptionally thick, > 1.25 μm after only 30 total layers for the poly(allylamine hydrochloride)/PNBHFA system. The films were very hydrophobic with the contact angle of water increasing with the layer number; reaching a maximum of ~ 123° after 50 total layers of poly(diallyldimethylammonium chloride)/PNBHFA. |
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Keywords: | Pseudo-polyelectrolyte Multilayers Poly[5-(2-trifluoromethyl-1,1,1-trifluoro-2-hydroxypropyl)-2-norbornene] Hydrophobicity |
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