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	Mechanistic Investigation of Surfactant-Free Emulsion Polymerization Using Magnetite Nanoparticles Modified by Citric Acid as Stabilizers
	Li, Keran1; Xie, Linfeng1; Wang, Bin1; Yan, Jiahe1; Tang, Haoru1; Zhou, Dahua2
	2020-07-21
摘要	Fe3O4-armored latexes were successfully synthesized by using modified Fe3O4 (IO) nanoparticles as stabilizers without a surfactant. The particle size, conversion, and particle number density of latex particles during the formation process were studied in detail. The surface charge density and the particle size evolutions of latexes were studied by dynamic light scattering. The use of scanning electron microscopy confirmed that IO nanoparticles were adsorbed on the polymer particle surface. Furthermore, the efficiency of iron oxide incorporation (IE) was evaluated by thermogravimetric analysis. The effect of pH, solid content, and zeta potential of IO nanoparticles on the results of polymerization was also discussed in detail. Attempts were made to explain the change of latex particle surface charge density by using Guy-Chapman-Stern's electric double layer theory. In addition, the effect of ionic strength of ammonium sulfate on particle number density of latex particles was described using P. John Feeney's equation. Finally, the mechanistic insights were discussed by studying polymerization kinetics.
DOI	10.1021/acs.langmuir.0c01493
发表期刊	LANGMUIR
ISSN	0743-7463
卷号	36期号:28页码:8290-8300
通讯作者	Li, Keran(lkkkkr@163.com) ; Zhou, Dahua(zhoudahua@cigit.ac.cn)
收录类别	SCI
WOS记录号	WOS:000555006400026
语种	英语