Preparation of effective ultraviolet shielding poly (lactic acid)/poly (butylene adipate-co-terephthalate) degradable composite film using co-precipitation and hot-pressing method

Wenlong Li; Ce Sun; Changxin Li; Yizhuo Xu; Haiyan Tan; Yanhua Zhang

doi:10.1016/j.ijbiomac.2021.09.097

Preparation of effective ultraviolet shielding poly (lactic acid)/poly (butylene adipate-co-terephthalate) degradable composite film using co-precipitation and hot-pressing method

Int J Biol Macromol. 2021 Nov 30:191:540-547. doi: 10.1016/j.ijbiomac.2021.09.097. Epub 2021 Sep 24.

Authors

Wenlong Li¹, Ce Sun¹, Changxin Li¹, Yizhuo Xu¹, Haiyan Tan¹, Yanhua Zhang²

Affiliations

¹ Key Laboratory of Bio-based Material Science & Technology, Northeast Forestry University, Ministry of Education, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Northeast Forestry University, Ministry of Education, Harbin 150040, China.
² Key Laboratory of Bio-based Material Science & Technology, Northeast Forestry University, Ministry of Education, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Northeast Forestry University, Ministry of Education, Harbin 150040, China. Electronic address: zhangyanhua@nefu.edu.cn.

PMID: 34571121
DOI: 10.1016/j.ijbiomac.2021.09.097

Abstract

Biodegradable poly (lactide) (PLA) and poly (butylene adipate-co-terephthalate) (PBAT) composite films were made by a co-precipitation and hot-pressing method. The property of composite films like the chemical interaction, phase morphology, mechanical properties, and thermal properties were studied. The Fourier transform infrared spectroscopy (FTIR) test manifested that there was a small amount of the transesterifications between the PBAT and PLA during hot pressing, which could improve the compatibility of the two phases. The tensile strength of the film only reduced by 7.4%, while the elongation at break was increased by 119.1% compared with PLA after adding 4%wt PBAT. The composite films showed a high Ultraviolet-visible (UV) light barrier property. The UV blocking rate of the composite after adding 4%wt PBAT was 6.95 times higher than that of pure PLA at 380 nm. The PLA/PBAT composite films with excellent thermal stability, satisfactory mechanical properties and UV-light barrier have high a possibility for an UV screening packaging application.

Keywords: PBAT; PLA; UV screening.

MeSH terms

Biodegradable Plastics / chemical synthesis*
Esterification
Polyesters / chemistry*
Radiation-Protective Agents / chemical synthesis*
Ultraviolet Rays

Substances

Biodegradable Plastics
Polyesters
Radiation-Protective Agents
poly(butylene adipate-co-butylene terephthalate)
poly(lactide)