Figure 23.
Scanning electron microscopy (SEM) image of foamed samples: (a) virgin PLA, (b) PLA/willow-fiber (80/20), and (c) PLA/willow-fiber (70/30). Reprinted from Zafar et al. [137]. With permission from Express Polymer Letters.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.