第49卷第5期2023年10月文章编号:1673-5196(2023)05-0020-08聚苯乙烯基磁性纳米塑料磁共振成像效果分析张龙*1.2,刘浩男1-2,高博1-2,辛琦1-2,唐洁1-2,艾纯金1-2(1.兰州理工大学材料科学与工程学院,甘肃兰州730050;2.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050)摘要:为了用于高效的细胞磁共振成像(MRI),开发了基于聚苯乙烯/Fe:O4纳米粒子的T2加权造影剂.采用双细乳液聚合法和分散聚合法分别制备出两种不同尺寸的纳米塑料模型,并对其进行细胞磁共振成像.结果表明:随着纳米塑料模型暴露浓度的增加,标记的小鼠巨噬细胞伪彩图像显示出显著的负对比度增强,灰度图像暗度加强,MRI信号强度也随着浓度的增加逐渐降低.ICP分析结果证实了小鼠巨噬细胞摄取纳米塑料模型的量随着样品浓度的增加而增加,聚苯乙烯基磁性纳米塑料模型可以为纳米塑料的细胞MRI成像提供一个全新的视角.关键词:纳米塑料;磁共振成像;造影剂;聚苯乙烯中图分类号:TB34Magneticresonanceimagingeffectofpolystyrene-basedmagneticnanoplasticsZHANGLong'*2,LIUHao-nan'*2,GAOBol-2,XINQil-2,TANGJiel-,AIChun-jin2(1.SchoolofMaterialsScienceandEngineering,LanzhouUniv.ofTech.,Lanzhou730050,China;2.StateKeyLaboratoryofAdvancedProcessingandRecyclingofNonferrousMetals,LanzhouUniv.ofTech.,Lanzhou730050,China)Abstract:Forefficientcellularmagneticresonanceimaging(MRI),aT2-weightedcontrastagentbasedonpolystyrene/Fe:O4nanoparticleswasdeveloped.Twokindsofnanoplasticmodelswithdifferentsizeswerepreparedbydoubleminiemulsionpolymerizationanddispersionpolymerization,respectively,andthecellMRIwasperformedonthem.Theresultsshowedthat:withtheincreaseoftheexposureconcentra-tionofthenano-plasticmodel,thepseudo-colorimagesoflabeledmousemacrophagesshowedsignificantnegativecontrastenhancement,enhanceddarknessofthegrayimage,andagradualdecreaseintheinten-sityofMRIsignal.TheresultsoftheICPanalysisconfirmedthattheuptakeofthenanoplasticmodelbymousemacrophagesincreasedwiththeincreaseofsampleconcentration.Thepolystyrenemagneticnano-plasticmodelcanprovideanewperspectiveforthecellMRIimagingofnanoplastics.Keywords:nanoplastics;magneticresonanceimaging;contrastagents;p...