Conductive flexible transparent wood film, preparation method thereof and electronic device

A preparation method of a conductive flexible transparent wood film, comprising the following steps:

• (1) performing a delignification treatment on a wood chip in an acidic buffer solution by using a sodium chlorite (NaClO2) solution to remove lignin in the wood chip, and thereby obtaining a delignified wood chip;
• (2) performing a hemicellulose removal treatment on the delignified wood chip in an alkaline solution to obtain a treated wood chip, placing the treated wood chip between a polyethersulfone membrane layer and a filter paper layer to be compressed under an external force for 24-48 hours (h) to obtain a transparent wood film;
• (3) using wood powder and multi-walled carbon nanotubes (MWCNTs) as raw materials to prepare a carbon nanotubes/TEMPO-oxidized cellulose nanofibers (CNT/TOCNFs) ink;
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• (4) printing the CNT/TOCNFs ink onto a surface of the transparent wood film to form a circuit on the surface of the transparent wood film, and thereby obtaining the conductive flexible transparent wood film-based electronic device.