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Encinas García, Noemí Día-Benito, Belén Abenojar, Juana Martínez, Miguel Ángel 2024-02-05T14:52:01Z 2024-02-05T14:52:01Z 2010 Encinas N, Díaz-Benito B, Abenojar J, Martinez MA. Extreme durability of wettability changes on polyolefin surfaces by atmospheric pressure plasma torch. Surf Coat Technol. 2010 Oct 15; 205(2):396-402 10.1016/j.surfcoat.2010.06.069 https://hdl.handle.net/20.500.14352/99043 https://doi.org/10.1016/j.surfcoat.2010.06.069 In the present work three common polyolefins: high density polyethylene (HDPE), low density polyethylene (LDPE) and polypropylene (PP) have been treated with an atmospheric pressure air plasma torch (APPT) in order to improve their wettability properties. The variations in surface energy (γs), as well as the durability of the treatment are determined by means of contact angle measurements for different aging times after plasma exposure (up to 270 days) using five test liquids which cover a wide range of polarities. The introduction of new polar moieties (carbonyl, amine or hydroxyl) is confirmed by Fourier transform infrared spectroscopy in attenuated total multiple reflection mode (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). Furthermore, scanning electron microscopy (SEM) provides information on the morphological changes and variation on surface roughness, revealing that smoother, lamellar and semispheric micrometric structures are created on the LDPE, HDPE and PP surfaces, respectively. Results show that APPT treatment enhances both the total and polar components of the γs under study, with an unprecedent stability (> 8 months) in time. eng http://creativecommons.org/licenses/by-nc-nd/4.0/ restricted access Attribution-NonCommercial-NoDerivatives 4.0 International Extreme durability of wettability changes on polyolefin surfaces by atmospheric pressure plasma torch journal article