【摘要】 利用表面引发原子自由基聚合(SI-ATRP)在超顺磁性纳米粒子表面引发甲基丙烯酸缩水甘油酯(GMA)单体聚合形成刷状聚合物,随后与四乙烯五胺(TEPA)通过开环反应形成氨化的超顺磁性纳米吸附材料(MNPs@NH2)。用傅里叶红外光谱仪(FI-IR)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、热重分析(TGA)、振动样品磁量计(VSM)、滴定法对产品进行了分析表征。结果表明,制备出的MNPs@NH2具有超顺磁性;在水中分散性能良好;粒径大约为10 nm;饱和磁矩高达40.4 emu/g;表面氨基质量摩尔浓度大约为2.78 mmol/g。更多还原

【Abstract】 The amine-functionalized superparamagnetic adsorbing nanoparticles( MNPs@ NH2) are synthesized by surface modification of superparamagnetic nanoparticle with surface-initiated atom transfer radical polymerization( SIATRP) of glycidyl methacrylate( GMA) and subsequent aminization with tetraethylenepentamine( TEPA). The nanoparticles are characterized by FI-IR,TEM,XRD,TGA,VSM and titration method. The results reveal that the assynthesized MNPs@ NH2 is superparamagnetic and dispersible well in water. The average diameter of the nanoparticles is about 10 nm and the saturation magnetization is about 40. 4 emu /g. The available amino group content on the particles is2. 78 mmol /g.更多还原