Hybrid biodegradable electrospun scaffolds based on poly(l-lactic acid) and reduced graphene oxide with improved piezoelectric response; Polymer Journal; Vol. X, iss. XX

Библиографические подробности
Источник:	Polymer Journal Vol. X, iss. XX.— 2022.— [16 p.]
Автор-организация:	Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий Научно-исследовательский центр "Физическое материаловедение и композитные материалы"
Другие авторы:	Pary (Pariy) I. O. Igor Olegovich, Chernozem R. V. Roman Viktorovich, Chernozem P. V. Polina Viktorovna, Mukhortova Yu. R. Yulia Ruslanovna, Skirtach A. G. Andre, Shvartsman V. V. Vladimir, Lupascu D. C. Doru, Surmeneva M. A. Maria Alexandrovna, Mathur S. Sanjay, Surmenev R. A. Roman Anatolievich
Примечания:	Title screen Piezoelectric poly-L-lactide (PLLA) is a biodegradable polymer used in various biomedical applications. However, tailoring and controlling the structure of PLLA to enhance its piezoelectric response remains a challenge. In this work, extensive characterization was performed to reveal the effect of the reduced graphene oxide (rGO) content (0.2, 0.7, and 1.0 wt%) on the morphology, structure, thermal and piezoelectric behavior of PLLA scaffolds. Randomly oriented homogeneous fibers and a quasi-amorphous structure for pure PLLA and hybrid PLLA-rGO scaffolds were revealed. The addition of rGO affected the molecular structure of the PLLA scaffolds: for example, the number of polar C=O functional groups was increased. Increasing the content of rGO to 1 wt% resulted in decreased glass transition and melting temperatures and increased the degree of crystallinity of the scaffolds. The addition of 0.2 wt% rGO enhanced the effective local vertical and lateral piezoresponses by 2.3 and 15.4 times, respectively, in comparison with pure PLLA fibers. The presence of the shear piezoelectric a-phase (P212121) in uniaxially oriented PLLA fibers and C=O bond rotation in the polymer chains explained the observed piezoresponse. Thus, this study revealed routes to prepare hybrid biodegradable scaffolds with enhanced piezoresponse for tissue engineering applications. Режим доступа: по договору с организацией-держателем ресурса
Язык:	английский
Опубликовано:	2022
Предметы:	электронный ресурс труды учёных ТПУ biomedical materials materials science physics биомедицинские материалы материаловедение физика
Online-ссылка:	https://doi.org/10.1038/s41428-022-00669-1
Формат:	Электронный ресурс Статья
Запись в KOHA:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668264