Citation: DING Long-Fei, WANG Ting, WU Li-Guang. Synthesis of AgCl Nanoparticles in Ionic Liquid Microemulsion and Regulation of AgCl/poly(MMA-co-St) Hybrid Membranes[J]. Chinese Journal of Inorganic Chemistry, ;2014, (2): 323-330. doi: 10.11862/CJIC.2014.002 shu

Synthesis of AgCl Nanoparticles in Ionic Liquid Microemulsion and Regulation of AgCl/poly(MMA-co-St) Hybrid Membranes

1.
College of Environment Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China

Corresponding author: WU Li-Guang,
Received Date: 18 June 2013
Available Online: 25 September 2013
Fund Project:

To obtain high performance membranes of polymer-silver salt complexes for the separation of aromatic/aliphatic hydrocarbons, a novel preparation method of AgCl/polymer hybrid membranes has been reported. AgCl nanoparticles were first synthesized in a water-in-oil (W/O) microemulsion, AgCl/polymer hybrid membranes are subsequently prepared via microemulsion in-situ polymerization. In the preparation of AgCl/polymer hybrid membranes, the composition of the microemulsion could not only affect the morphology of AgCl nanoparticles, but also regulate the performance of the hybrid membranes. In this paper, AgCl nanoparticles were synthesized in W/Omicroemulsion using the ionic liquid 1-dodecyl-3-methyl imidazoium chloride (C₁₂mimCl) as the surfactant and methyl methacrylate-styrene (MMA-St) mixture as the oil phase. Aqueous AgNO₃ solution was added to the microemulsion as the source of Ag⁺ ions. Then, AgCl/poly(MMA-co-St) hybrid membranes were prepared by microemulsion in situ polymerization. The influence of the ratio of St to MMAin the oil phase and molar ratio of water to surfactant (ω) on the morphology of AgCl nanoparticles in the microemulsion were characterized by UV-visible spectroscopy (UV-Vis) and transmission electron microscopy (TEM). The scanning electron microscopy (SEM) and the swelling-sorption experiments of the hybrid membranes were employed to explore the relationship between the composition of the microemulsion and the membrane performance. The results showed that the increase in the ratio of St to MMAin the oil phase depressed the polarity of the oil phase, which led to the formation of more AgCl nanoparticles with good dispersion in the hybrid membrane. And these increased significantly the equilibrium swelling-sorption degree in benzene (A_∞,b) and the swelling-sorption selectivity of benzene to cyclohexane (α_s,b/c) of AgCl/poly(MMA-co-St) hybrid membranes. While the ratio of St to MMAin the oil phase was 1:3, A_∞,b and α_s,b/c reached 330 mg·g^-1 and 19.21. When excess styrene was added to the oil phase, the stability of W/Omicroemulsion was reduced and large AgCl particles generated in the microemulsion, which significantly decreased A_∞,b and α_s,b/c of AgCl/poly(MMA-co-St) hybrid membranes. The increase of ω resulted in the formation of more AgCl nanoparticles in the microemulsion, which enhanced A_∞,b and α_s,b/c of AgCl/poly(MMA-co-St) hybrid membranes. When ω was more than₅, A_∞,b and α_s,b/c of AgCl/poly(MMA-co-St) hybrid membranes decreased because of the aggregation of AgCl particles.
- C₁₂mimCl;ionic liquid microemulsion;AgCl nanoparticles;hybrid membrane;swelling-sorption performance
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