Electrospinning preparation of perylene-bisimide-functionalized graphene/polylactic acid shape-memory films with excellent mechanical and thermal properties. (22nd December 2020)

• Record Type: Journal Article
• Authors: Liu, Kuo; Peng, Qingyuan; Li, Ziwei; Cheng, Jingzhen; Lao, Li; Li, Xing; Zhang, Zuocai; Lu, Shaorong; Li, Yuqi
• Is Part Of: New journal of chemistry. Volume 45:Number 2(2021)
• Page Start: 772
• Page End: 779
• Publication Date: 2020-12-22
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj04737f
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Electrospinning preparation of perylene-bisimide-functionalized graphene/polylactic acid composite films with shape-memory properties. Abstract : Developing polylactic acid (PLA) shape-memory films with excellent mechanical and thermal properties is essential for applying PLA in the shape-memory materials field. In this study, a series of perylene-bisimide-functionalized graphene nanosheet (PBI–GN )/PLA shape-memory films were successfully prepared by electrospinning. The effects of PBI–GNs on the mechanical, thermal, and shape-memory properties of the PLA nanofiber films were systematically studied. Results showed that with a 9 wt% content of PBI–GNs, the thermal stability of the composite film significantly improved, and the tensile strength and elongation at break increased by 346% and 11.1%, respectively, compared with those of the neat PLA nanofiber film. Moreover, at this percentage of PBI–GNs, the composite film exhibited the maximum shape recovery of 92.3%, which was 36.3% higher than that of the neat film. After five thermomechanical test cycles, the ratio decreased by only 3.7%.