Spatially selective modification of PLLA surface: From hydrophobic to hydrophilic or to repellent; Applied Surface Science; Vol. 397

Spatially selective modification of PLLA surface: From hydrophobic to hydrophilic or to repellent; Applied Surface Science; Vol. 397

Bibliografiska uppgifter
Parent link:Applied Surface Science.— , 1985-
Vol. 397.— 2017.— [P. 226–234]
Institutionell upphovsman: Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра технологии органических веществ и полимерных материалов (ТОВПМ)
Övriga upphovsmän: Bastekova K. Kristina, Guselnikova O. A. Olga Andreevna, Postnikov P. S. Pavel Sergeevich, Elashnikov R. Roman, Kunes M. Martin, Kolska Z. Zdenka, Svorcik V. Vaclav, Lyutakov O. Oleksy
Sammanfattning:Title screen
A universal approach to controlled surface modification of polylactic acid (PLLA) films using diazonium chemistry was proposed. The multistep procedure includes surface activation of PLLA by argon plasma treatment and chemical activation of arenediazonium tosylates by NaBH4. The surface of PLLA film was grafted withdifferentfunctional organic groups (OFGs), changing the PLLAsurface properties (wettability, morphology, zeta potential, chemical composition, and mechanical response). Three approaches of OFG grafting were examined: (i) plasma treatment following by PLLA immersion into diazonium salt aqueous solution; (ii) grafting of PLLA surface through the reaction with chemically created aryl radicals; (iii) mutual combination of both methods The best results were achieved in the last case, where the previous plasma treatment was combined with further reaction of PLLA surface with generated aryl radicals. Using this method PLLA surface was successfully grafted with amino, carboxyl, aliphatic and fluorinated OFGs. Further investigation of surface properties from potential biological and medical points of view was performed using zeta potential, biodegradation and biofouling tests. It was shown that proposed technique allows preparation of biorepellent or bioabsorptive surfaces, tuning of PLLA biodegradation rate and nanomechanical properties, as well as the introduction of inverse properties (such as hydrophilic and hydrophobic) on both sides of PLLA films.
Режим доступа: по договору с организацией-держателем ресурса
Språk:engelska
Publicerad: 2017
Ämnen:
электронный ресурс
труды учёных ТПУ
plasma
модификации
поверхности
свойства
плазма
диазоний
соли
Länkar:http://dx.doi.org/10.1016/j.apsusc.2016.11.062
Materialtyp: Elektronisk Bokavsnitt
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=653712

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