Emulsion Graft Polymerization of Methyl Methacrylate onto Cellulose Nanofibers
Published: 1 January 2021
Green and Sustainable Chemistry , Volume 11, pp 9-22; doi:10.4236/gsc.2021.111002
Abstract: 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.
Keywords: methyl methacrylate / Cellulose Nanofibers / Emulsion / graft polymerization / Diethylzinc
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