Electrospun poly (lactic acid) -cotton core-shell yarns: Processing, morphology, and mechanical properties


Maleki H., YILMAZ D., Semnani Rahbar R., ALAY AKSOY S.

JOURNAL OF COMPOSITE MATERIALS, 2022 (Peer-Reviewed Journal) identifier

  • Publication Type: Article / Article
  • Publication Date: 2022
  • Doi Number: 10.1177/00219983221116670
  • Journal Name: JOURNAL OF COMPOSITE MATERIALS
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Chimica, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Cotton, poly (lactic acid), electrospinning, ring spinning, core-shell yarn, twist, mechanical properties, SMART TEXTILE, NANOFIBER, FRICTION, FABRICS, DESIGN, FIBERS, TWIST

Abstract

In this study, aiming to improve the mechanical performance of the Poly (lactic acid) (PLA)-based nanofibrous structures, the electrospinning method was employed to develop twisted yarns with core-shell structure. Within this process, a conventional ring-spun cotton yarn fed to the electrical field, where nanofibers covered it by a certain orientation owning to the twisting procedure. This approach combines the excellent biological and physical-mechanical properties of cotton with outstanding features of the PLA nanofibers for biomedical applications. The effects of the core and shell structures on the ultimate properties of the electrospun core-shell yarns were investigated. Scanning electron microscopy (SEM) demonstrated that relatively uniform and bead-free fibers with smooth surfaces were formed. SEM images also confirmed that the nanofibers were arranged around the core with a specific angle to the axis (with the angle range of 8-44 based on the twisting rate) to constitute a twisted core-shell yarn. The diameter of the electrospun yarns decreased (similar to 22%) by increasing the twist rate. The influence of the core on the mechanical behavior of core-shell yarn are also discussed. Improvements in mechanical performance of core-shell yarns were generally perceived at low twist levels of the core yarn (alpha(e) = 2.8), and electrospun shell (40 rpm).