GO-<i>g</i>-PLBI柔性复合薄膜的制备及包装特性

doi:10.11896/cldb.25020033

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Abstract Poly(L-lactic acid) (PLLA) is a promising alternative to conventional petroleum-based plastics due to its biodegradability, biocompatibility, and other advantageous properties. However, its practical application in food packaging is hindered by several limitations, including inherent brittleness, low UV resistance, and moderate air barrierperformance. To enhance the packaging properties of PLLA, unsaturated poly(butylene itaconate) (PBI) was first synthesized using melt polycondensation. Subsequently, graphene oxide (GO)-grafted unsaturated polylactic acid P(GO-g-LA-g-BI) (GO-g-PLBI) was prepared through in-situ polymerization. The resulting films were fabricated via the solution casting method and characterized by means of UV-visible spectroscopy, differential scanning calorimetry, and tensile property test. The experimental results demonstrated that GO could serve as an initiator in the lactic acid (LA) polycondensation process, facilitating the homogeneous dispersion of GO nanosheets and the formation of multibranched structures. This in turn enhanced the film’s thermal stability, tensile properties, and oxygen and UV-blocking capabilities, while simultaneously maintaining a high level of transparency (82.4%). Compared to the neat PLBI film, the GO-g-PLBI0.005 film exhibited an approximately 60% increase in elongation at break, while the oxygen transmission rate of the GO-g-PLBI0.05 film was reduced by about 35%. This study presents a viable approach for developing polylactic acid/graphene oxide nanocomposite food packaging materials with high barrier properties, thermal stability, UV resistance, and transparency.

Key words： poly(L-lactic acid) (PLLA) graphene oxide (GO) in-situ polymerization microcrosslinking barrier property

Published: 10 February 2026 Online: 2026-02-13

CLC number:

TQ32

Corresponding Authors: yun_imau@163.com

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	ZHANG Yuan
	ZHANG Jiatao
	GUO Jia
	LI Yulu
	DONG Tungalag
	LI Shaobo
	YUN Xueyan

Cite this article:

ZHANG Yuan,ZHANG Jiatao,GUO Jia, et al. Preparation of GO-g-PLBI Flexible Composite Film and Its Packaging Properties[J]. Materials Reports, 2026, 40(3): 25020033-7.

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https://www.mater-rep.com/EN/10.11896/cldb.25020033 OR https://www.mater-rep.com/EN/Y2026/V40/I3/25020033

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