Facile preparation of polymer-grafted halloysite nanotubes via a redox system: a novel approach to construct antibacterial hydrogel
writer：Yanfang Ma, Zhihang Zhao, Boyan Tang, Yonggang Wu and Hailei Zhang*
keywords：halloysite
source：期刊
specific source：Macromolecular Research
Issue time：2020年
We demonstrate the use of a supernormal
valence transition-metal (Ce(IV) and Cu(III))-mediated redox system for the
surface grafting on the halloysite nanotubes (HNTs).
Following this way, commonly-used vinyl monomers were grafted on HNTs in one
step under mild
condition. The grafting was evidenced using FTIR,
X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA).
The micromorphology was carefully characterized by transmission electron
microscope (TEM). The results indicate that the surface grafting reaction was
successfully processed in all cases, in which the Ce(IV) shows a much higher
initiation activity than that of Cu(III). Then a uniform hydrogel was
constructed by mixing polycation-grafted HNTs (HNTs-P(Et-P)) with
polyanion-grafted HNTs (HNTs-P(AA-Na)), which show desirable antibacterial
activity.