Preparation of crystallites for oriented poly(Lactic Acid) films using a casting method under a magnetic field

Shuta Hara, Shuto Watanabe, Kohki Takahashi, Shigeru Shimizu, Hiroki Ikake

Research output: Contribution to journalArticle

Abstract

Poly-L-lactic acid (PLLA) has biocompatibility and unique characteristics such as piezoelectric properties. This attracts attention not only in the environmental field but also in the biomedical and electronic materials fields. In recent years, the literature about orienting PLLA crystals has been promoting new applications for PLLA such as high strength fiberization and piezoelectric properties. This paper presents a new technique to orient the PLLA crystalline through casting under magnetic irradiation. The advantage of this technique is that it is possible to radiate the magnetic field to the PLLA crystalline in an extremely low viscosity environment. Moreover, the heat treatment condition was optimized in order to improve the low crystallinity of casting, and it succeeded in producing a PLLA film with a high degree of orientation and high crystallinity. Furthermore, PLLA/1-butyl-3-methylimidazolium dibutylphosphate (bmimjdbp) composite films were prepared under the same conditions, and this also succeeded in the further improvement of crystallinity.

Original languageEnglish
Article number1083
JournalPolymers
Volume10
Issue number10
DOIs
Publication statusPublished - 2018 Sep 29

Keywords

  • Ionic liquid
  • Magnetic orientation
  • Poly-L-lactic acid
  • α-crystal

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics

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