Universität zu Köln

Pariy, Igor O., Chernozem, Roman, V, Chernozem, Polina, V, Mukhortova, Yulia R., Skirtach, Andre G., Shvartsman, Vladimir V., Lupascu, Doru C., Surmeneva, Maria A., Mathur, Sanjay and Surmenev, Roman A. (2022). Hybrid biodegradable electrospun scaffolds based on poly(l-lactic acid) and reduced graphene oxide with improved piezoelectric response. Polym. J., 54 (10). S. 1237 - 1253. LONDON: SPRINGERNATURE. ISSN 1349-0540

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Abstract

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 alpha-phase (P2(1)2(1)2(1)) 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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pariy, Igor O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chernozem, Roman, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Chernozem, Polina, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Mukhortova, Yulia R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Skirtach, Andre G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Shvartsman, Vladimir V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lupascu, Doru C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Surmeneva, Maria A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Surmenev, Roman A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-678344
DOI:	10.1038/s41428-022-00669-1
Journal or Publication Title:	Polym. J.
Volume:	54
Number:	10
Page Range:	S. 1237 - 1253
Date:	2022
Publisher:	SPRINGERNATURE
Place of Publication:	LONDON
ISSN:	1349-0540
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RING-OPENING POLYMERIZATION; DOUBLE-MELTING BEHAVIOR; CRYSTAL-STRUCTURE; LACTIC-ACID; PHYSICAL-PROPERTIES; POLY(LACTIC ACID); X-RAY; CRYSTALLIZATION; KINETICS; BONE Multiple languages Polymer Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67834