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首页> 外文期刊>Materials Science and Engineering >Supercritical fluid mediated synthesis of poly(2-hydroxyethyl methacrylate)/Fe_3O_4 hybrid nanocomposite
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Supercritical fluid mediated synthesis of poly(2-hydroxyethyl methacrylate)/Fe_3O_4 hybrid nanocomposite

机译：超临界流体介导的甲基丙烯酸2-羟乙酯/ Fe_3O_4杂化纳米复合材料的合成

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摘要

Poly(2-hydroxyethyl methacrylate) (PHEMA) and magnetic nanoparticle (Fe_3O_4) hybrid nanocomposite was synthesized by dispersion polymerization in supercritical carbon dioxide (scCO_2) using a copolymeric stabilizer, poly[(2-dimethylamino)ethyl methacrylate-co-1H,1H-perfluorooctyl methacrylate] (PDMAEMA-co-PFOMA). Fe_3O_4 nanoparticles were first surface-modified with a silane coupling agent methacryloxypropyltrimethoxysilane (MPTMS), which provides a reactive C=C bond and can copolymerize with 2-hydroxyethyl methacrylate (HEMA). After immobilization of the silane coupling agent, polymer chains were successfully grafted onto the surface of Fe_3O_4, resulting in the formation of core-shell nanostructure. FE-TEM pictures showed that the nanoparticles were well dispersed in the polymer matrix. The incorporation of Fe_3O_4 in the nanocomposite was confirmed by FT-1R, XRD and XPS. Thermal stability and magnetic property increase with the increasing amount of Fe_3O_4 nanoparticles in the composite. This new environmentally benign green synthetic route may offer advantages of easy separation and solvent removal.
机译：聚甲基丙烯酸2-羟乙酯（PHEMA）和磁性纳米粒子（Fe_3O_4）杂化纳米复合材料是通过在共聚稳定剂聚[（2-二甲基氨基）乙基甲基丙烯酸-co-1H，1H -甲基丙烯酸全氟辛酯]（PDMAEMA-co-PFOMA）。首先用硅烷偶联剂甲基丙烯酰氧基丙基三甲氧基硅烷（MPTMS）对Fe_3O_4纳米粒子进行表面改性，该硅烷偶联剂提供反应性C = C键并可以与甲基丙烯酸2-羟乙酯（HEMA）共聚。固定硅烷偶联剂后，聚合物链成功接枝到Fe_3O_4的表面上，导致形成核壳纳米结构。 FE-TEM照片显示纳米颗粒很好地分散在聚合物基质中。 FT-1R，XRD和XPS证实了Fe_3O_4在纳米复合材料中的结合。随着复合材料中Fe_3O_4纳米粒子含量的增加，热稳定性和磁性能也随之提高。这种新的对环境无害的绿色合成路线可能具有易于分离和去除溶剂的优点。

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