Methyl
methacrylate (MMA) was successfully grafted onto cellulose nanofibers (CNFs) at
room temperature in an emulsion system using a diethyl(1,10-phenanthroline N1,N10)zinc(II) complex (Phen-DEZ)
with oxygen as the radical initiator. The effects of reaction temperature,
initiator concentration, and monomer content on the grafting reaction were
investigated. The molecular weight of the non-grafted PMMA, which was produced
during graft polymerization, was more than 1 million, as determined by size
exclusion chromatography. The PMMA-grafted CNFs were analyzed by Fourier
transform infrared spectroscopy, thermogravimetric analysis, and scanning
electron microscopy, which confirmed the grafting of PMMA on the nanofiber
surface. The study presents a strategy for the grafting of high-molecular
weight PMMA onto CNFs in an emulsion system using Phen-DEZ and O2.
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