5 years ago

Modification of GO based on click reaction and its composite fibers with poly(vinyl alcohol)

Modification of GO based on click reaction and its composite fibers with poly(vinyl alcohol)
We present a novel approach to the functionalization of graphene oxide (GO) based on click reaction, in which GO was modified by 3-mercaptopropionic acid (MPA) via thiol-ene reaction in mild reacting conditions. The modified GO (mGO) was bonded with poly(vinyl alcohol) (PVA) to get PVA grafted mGO (p-mGO) and the composite fibers of PVA and p-mGO were prepared using a wet-spinning process. Compared with PVA grafted GO (p-GO) without the process of click reaction, where PVA chains only distribute at the edge of GO, much more PVA chains are bonded on the surface of mGO. Therefore, p-mGO has better dispersibility in PVA than p-GO because of better interaction between p-mGO and PVA, resulting in much higher mechanical properties of PVA/p-mGO than PVA/p-GO. For example, the strength of PVA/p-mGO fiber is up to 908.93MPa, 57% higher than that of PVA/p-GO fiber at the same GO loading of 0.4wt%.

Publisher URL: www.sciencedirect.com/science

DOI: S1359835X17302026

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