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A Facile Way to Fabricate Hybrid Microparticles with Tunable Structures  
A Facile Way to Fabricate Hybrid Microparticles with Tunable Structures
資料類型: PDF文件
關鍵詞: Precipitant  approach  Self-assembly  Morphology  Amphiphiles  
資料大?。?/td> 99K
所屬學科: 分子表征
來源: 第六屆亞歐研討會上處理和性能增強聚合物會議文集(2013.6.2-6 武漢)
簡介:
Itiswellknownthat[6,6]-phenylC61butyricacidmethylester(PCBM)isthemostcommonn-typesemiconductormaterialusedinpolymersolarcells,andalmostonlyneedle-likecrystallitewithlengthsoftensofmicrometerscanbeformed.Meanwhile,muchworkaboutthepreparationoforderedstructureswithvariedmorphologieshasbeenreportedbytakingadvantageoftheself-assemblyofamphiphilicmolecules.Wewillintroducetheself-assemblyofamphiphilicmoleculesPCBM-PEGsynthesizedbyattachingethyleneglycol(EG)moleculestoPCBM.Duetoamphiphilicnatureofthispolymer,PCBM-PEGcanself-assembleintovariousmorphologiesinselectivesolvent.Wewillpresentasimpleandefficientroutetoproduceuniqueassembliesthroughtheprecipitationmethod.Inatypicalexperiment,PCBM-PEGwasfirstlydissolvedinagoodsolvent,forexampleN,N-Dimethylformamide(DMF);acertainamountofacetonitrile(apoorsolventforPCBM)wasthendroppedintothesolutionwithstingingstirringtoinducetheself-assemblyofthepolymer.Afteragingforseveraldays,uniqueassembliescanbeobtainedbydroppingadropofthesolutiononasiliconwaferundervarioussolventevaporationconditions.Byvaryingtheratioofgoodsolventtotheselectivesolventandthesolventevaporationrate,uniqueaggregateswithvariedmorphologies(e.g.,sphere,doughnut-like,bowl-likeandslice-likestructures)andsizesrangingfrommicronstonanometerscanbeformed.
作者: J. Y. Li, R. J. Liang,J. T. Zhu
上傳時間: 2013-07-04 14:11:30
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