Study on the biodegradation of polybutylene adipate-co-terephthalate/starch film containing deep eutectic solvent

Dan Meng; Guiyang Zhu; Jun Sun; Hongfei Li; Xiaoyu Gu; Sheng Zhang

doi:10.1016/j.jenvman.2023.117419

Study on the biodegradation of polybutylene adipate-co-terephthalate/starch film containing deep eutectic solvent

J Environ Manage. 2023 Apr 15:332:117419. doi: 10.1016/j.jenvman.2023.117419. Epub 2023 Jan 31.

Authors

Dan Meng¹, Guiyang Zhu¹, Jun Sun¹, Hongfei Li², Xiaoyu Gu³, Sheng Zhang¹

Affiliations

¹ State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
² State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China. Electronic address: hfli@mail.buct.edu.cn.
³ State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China. Electronic address: guxy@mail.buct.edu.cn.

PMID: 36731403
DOI: 10.1016/j.jenvman.2023.117419

Abstract

Poly (butylene adipate-co-terephthalate) (PBAT) has attracted much attention as a biodegradable polymer, but its biodegradation speed is slow. Starch was blended with PBAT to develop daily packing film with high biodegradation speed, and deep eutectic solvent (DES) composed of choline chloride (CHCl)/glycerol (Gly) (molar ratio of 1:2) was used as a novel plasticizer. The hydrophilic starch is in favor of the breeding of microorganisms, at the same time DES can provide energy for the breeding. The degradation was traced in a simulated composting test using kitchen waste. After the PBAT/starch-DES film was buried in a mixture of food residue for 90 D, the relative weight molecular weight (M_w) of the PBAT decreased by about 50%. Furthermore, with the help of DES, the compatibility between PBAT and starch was improved, the PBAT/starch-DES film became more transparent than the PBAT and PBAT/starch film, and its tensile strength reached 7.9 MPa with an elongation at break of 335.6%. This work provided a simple and efficient solution to obtain rapidly degradable films.

Keywords: Biodegradation; Deep eutectic solvents; Mechanical properties; Poly (butylene adipate-co-terephthalate); Starch.

MeSH terms

Adipates
Deep Eutectic Solvents*
Starch* / chemistry

Substances

polybutene
terephthalic acid
Deep Eutectic Solvents
Starch
Adipates