Biodegradable and renewable UV-shielding polylactide composites containing hierarchical structured POSS functionalized lignin

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

33 Scopus Citations
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Author(s)

  • Xianwu Cao
  • Jingshu Huang
  • Chunyan Hu
  • Qunchao Zhang
  • Xinmao Yin

Detail(s)

Original languageEnglish
Pages (from-to)323-332
Journal / PublicationInternational Journal of Biological Macromolecules
Volume188
Online published8 Aug 2021
Publication statusPublished - 1 Oct 2021

Abstract

The demand for biodegradable and renewable UV-shielding materials is ever increasing due to the rising concern for the environment. In this paper, biobased lignin was functionalized by polyhedral oligomeric silsesquioxane (POSS) with an epoxy substituent. Then the POSS decorated lignin (lignin-POSS) was mixed with polylactide (PLA) to act as UV-shielding filler by melt compounding. The SEM observation revealed that the presence of POSS contributed to improving the homogeneous dispersion of lignin-POSS in the PLA matrix with good compatibility when the content of lignin-POSS was lower than 5 wt%. The synergistic effects of lignin and POSS endowed PLA composite films with a good balance of UV-shielding ability and transparency in the visible light region. With the addition of 5 wt% lignin-POSS, the PLA composite film absorbed almost all UV irradiation across the entire UV spectrum. In addition, the presence of lignin-POSS could serve as a nucleating agent to increase the degree of crystallinity of PLA. The dynamical rheological tests revealed that the lignin-POSSS reduced the complex viscosity and storage modulus of PLA composites, improving the flowability of PLA composites. This work presents a viable pathway to prepare biodegradable and renewable UV-shielding materials for potential packaging applications.

Research Area(s)

  • Lignin, Polylactide, UV shielding

Citation Format(s)

Biodegradable and renewable UV-shielding polylactide composites containing hierarchical structured POSS functionalized lignin. / Cao, Xianwu; Huang, Jingshu; He, Yun et al.
In: International Journal of Biological Macromolecules, Vol. 188, 01.10.2021, p. 323-332.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review