聚己内酯微泡制备和表征.PDF
文本预览下载声明
第40卷第6期 武 汉 工 程 大 学 学 报 Vol.40 No.6
第6期 2018年12月 JournalofWuhanInstituteofTechnology Dec. 2018
文章编号:1674-2869(2018)06-0645-04
聚己内酯微泡的制备与表征
付慧莉,程 戈
武汉工程大学材料科学与工程学院,湖北 武汉 430205
摘 要:微泡包覆气体的核壳结构赋予其独特性能,使其成为超声示踪剂和药物与生物活性气体载体的优
质候选,其中微泡能否稳定地包覆核心气体成为关键。本文用溶剂挥发界面沉积法制备了以聚己内酯为
外壳主体、核心包覆氮气的微泡,并对微泡进行了结构、形貌、粒径分布、超声成像和稳定性的表征。结果
表明聚己内酯微泡制备成功,且具有薄壳空腔的结构,外壳完整,尺寸均一,平均粒径为2.2 μm;微泡的超
4 -1 6 -1
声成像信号强度在微泡浓度范围10 mL ~10 mL 之间随浓度增加而明显增强;并且微泡在生理环境下能
够稳定包覆核心气体至少14d,具备成为超声示踪剂和药物与生物活性气体载体的潜力。
关键词:聚己内酯;微泡;超声成像;稳定性
中图分类号:O633;R318 文献标识码:A doi:10.3969/j.issn. 1674⁃2869.2018.06.012
PreparationandCharacterizationofPolycaprolactoneMicrobubbles
FU Huili ,CHENG Ge
SchoolofMaterialsScienceandEngineering,WuhanInstituteofTechnology,Wuhan430205,China
Abstract:Thecore-shellstructureofgas-encapsulatedmicrobubblesenduesthemuniquepropertiesandmakes
themexcellentcandidatesofultrasoundtraceranddrugandbioactivegascarrier.However,thekeyiswhether
the encapsulated gas can be durably maintained. In the present work,nitrogen gas was encapsulated by
polycaprolactoneasthepolymershellusingasolventevaporationinterfacialdepositiontechnique.Thestructure,
morphology,size distribution,acoustic activity and acoustic duration of the microbubbles were also
characterized.Theresultsshowthatthepolycaprolactonemicrobubblesaresuccessfullypreparedwithgascore,
intact thin shell and uniform size distribution with a mean size of 2.2 μm. The video intensity of the
4 -1 6 -1
microbubbles enhances significantly as their concentration increases from 10 mL to 10 mL during the
ultrasoundimaging.Themicrobubblescanmainta
显示全部