The principle and characterization of self curling film (PU/PGAX) (IMAGE)

Beijing Institute of Technology Press Co., Ltd

The principle and characterization of self curling film (PU/PGAX)

Caption

(A) Shape changes and schematic diagrams of pinecones and polyurethane (PU)/γ-polyglutamic acid (PGAX) before and after soaking in water. (B) Shape of PU/PGAX film after soaking in water. (C) ATR-FTIR spectra of top (+) and bottom (−) of the PU/PGA15 film. (D) O1s x-ray photoelectron spectroscopy (XPS) spectra of PU and PU/PGA10 films. Scanning electron microscopy (SEM) images of the top (+) and bottom (−) of the PU/PGA10 film before (E) and after (F) water immersion.

Credit

Xiaolei Guo, Sichuan University.

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