Effect of functionalized nanodiamond on properties of polylactic acid eco-friendly composite films

Wenshuang Han, Minjie Wu, Jianxin Rong, Shuo Zhang, Xinyang Zhang, Tao Zhao, Xiaoyan Yu, Kimiyoshi Naito, Qingxin Zhang

Research output: Contribution to journalArticlepeer-review


With the depletion of petroleum energy and the seriousness of environmental problems, environmentally friendly materials are attracting more and more research attentions. Polylactic acid (PLA) has good biodegradability and biocompatibility, while its inherent brittleness and low toughness severely limit its scope of application. In this study, maleic anhydride grafted styrene-ethylene/butylene-styrene copolymers (MAH-g-SEBS) functionalized nanodiamond (SEBS-g-ND) was successfully prepared by covalent linkage of MAH-g-SEBS and aminated nanodiamond(NH2-ND) via acid-amine condensation, which improved the interfacial adhesion of nanodiamond(ND) to the matrix and achieved uniform dispersion of nanoparticles in the matrix. SEBS-g-ND was used as a reinforcing agent for the PLA/MAH-g-SEBS blended films to achieve simultaneous enhancement of PLA strength and fracture toughness. The results revealed that the tensile strength, modulus of elasticity and elongation at break were increased by 41.0, 50.6 and 543.7 %, respectively, when SEBS-g-ND was added at 1.5 wt%. At the same time, the thermal degradation temperature and thermal conductivity of the nanocomposite films were increased. This is of great significance to areas of PLA commercial plastics and biofilms.

Original languageEnglish
Article number109717
JournalDiamond and Related Materials
Publication statusPublished - 2023 Mar
Externally publishedYes


  • MAH-g-SEBS
  • Mechanical properties
  • Modified nanodiamond
  • Polylactic acid

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering


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