We demonstrate that the wettability of cellulose paper/nanopaper can be tailored by a rapid and efficient thiol-yne click reaction. Firstly, the paper/nanopaper was functionalized with 4-pentynoic acid via well-known and scalable esterification procedure. Degrees of substitution (DO) of 0.2 and 0.3 were obtained for the paper and nanopaper, respectively. Next, the alkyne-bearing cellulose substrate was subjected to photo-induced click reactions with various thiol-containing molecules to yield either hydrophobic or hydrophilic cellulose surfaces. Finally, micropatterning of the cellulose surfaces was demonstrated by using a photomask-assisted approach. Scanning electron microscopy (SEM), contact angle measurements (CAM) and X-Ray photoelectron spectroscopy were applied to characterize the main morphological and chemical features of the produced materials. Main results and possible applications for such systems will be discussed.

Tailoring the surface wettability of cellulose paper/nanopaper via photo-induced click reactions

253rd National Meeting (2017)

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