To create the synthetic wood, scientists took a solution of polymer resin and added a pinch of chitosan, a sugar polymer derived from the shells of shrimp and crabs. They freeze-dried the solution, yielding a structure filled with tiny pores and channels supported by the chitosan.

from https://www.scientificamerican.com/article/scientists-create-artificial-wood-that-is-water-and-fire-resistant/
https://static.scientificamerican.com/sciam/cache/file/83077F7E-6884-47C5-93245CB42F29666E_source.jpg?w=590&h=800&D0CBA2FC-949A-4FF4-8B108EA815E71C70