Details

Autor(en) / Beteiligte

• Yan, Zhendong
• Wang, Yang
• Li, Ting
• Xu, Pengwu
• Huang, Jing
• Jiang, Jie
• Zhang, Xuhui
• Xia, Bihua
• Wang, Shibo
• Dong, Weifu

Titel

Dual-functional NIR/UV-shielding poly(lactic acid) nanocomposite films through CWO@PDA core-shell nanoparticles

Ist Teil von

• New journal of chemistry, 2022-08, Vol.46 (31), p.1564-157

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Nanoparticles with ultraviolet/near-infrared (UV/NIR) shielding ability have great potential in the application research of energy-saving materials. In this study, we prepared dual-functional UV/NIR-shielding poly(lactic acid) (PLA) composite films. Firstly, Cs x WO 3 @polydopamine (CWO@PDA) nanoparticles with core-shell structures were formed by dopamine self-polymerization on the surface of CWO, and then CWO@PDA- g -PLLA nanoparticles were successfully prepared by ring-opening polymerization with l -lactide as a raw material. Finally, PDLA/CWO@PDA- g -PLLA composite films containing different proportions of CWO@PDA- g -PLLA nanoparticles were fabricated via a solvent casting method. The results showed that these films have an excellent UV shielding performance and strong absorption in the NIR region (800-2500 nm). When 1.5 wt% of CWO@PDA- g -PLLA nanoparticles was added, the near-infrared transmittance of the composite films decreases significantly from 79.7% to 29.8%. More importantly, the nanoparticles can be used as a heterogenous nucleator to enhance the HC crystallization of PDLA and form stereocomplex crystallites between PDLA and CWO@PDA- g -PLLA nanoparticles which improved the mechanical properties. This study provided a new method for the preparation of PLA nanocomposites with excellent UV/NIR shielding function. These nanocomposites are promising for practical application on energy-saving windows. Fabrication of dual-functional NIR/UV-shielding PLA nanocomposite films by constructing interfacial stereocomplex crystallites.