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2018-08-31 10:11 735閱讀次數(shù)

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• Multi-scaled polymersomes from self-assembly of octadecanol-modified dextrans

  Lipid-conjugatedpolysaccharidevesiclesinnano-andmicro-scaleweredevelopedfromamphiphilicoctadecanol-modifieddextrans(OMD)preparedbypartialesterificationofdextranwithactivatedoctadecanol-carbamateimidazoleinawell-controlledmanner.Thecriticalaggregationconcentration(CAC)ofOMDadductsinaqueousphasevaries,dependingmainlyontheiroctadecanolcontents.ThroughsupramolecularassemblyoftheOMDadductscomprisingeither17or28mol%octadecanolresidueswithrespecttotheanhydroglucopyranoseunitsbythepartialsolventdisplacementtechniquewiththeinitialwatercontentofDMSO/H2Osolutionsbeyondacriticalpoint,stablenano-scaledOMDassembliesweredevelopedandcharacterizedbythevesicle-likemorphology.ThedimensionofpolymersomescanbeeffectivelycontrolledbytheOMDcompositionaswellastheinitialwatercontent.Ontheotherhand,micro-scaledOMDpolymersomescanbeachievedbythedoubleemulsiontechniqueinawater/oil/water(w1/o/w2)manner.BoththecontentsofNaClinaqueoussolutionasthew1phaseandofDMSOinDMSO/CHCl3co-solventsastheorganicphase,inwhichOMDwasdissolved,areofgreatimportanceincontrol領thepolymersomemorphologyandsize.Thesemicro-scaledOMDpolymersomewallsarecharacterizedbysize-selectivepermeabilitycapableofencapsulatinglargewater-solublecargoeswhileallowingtransportofsmallpolarspeciesacrossthemembrane,therebyrenderingtheseuniquecolloidalparticlesofpotentialapplicationsinbiomedicaltechnologies.[詳細]

  2018-08-31 10:11

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• Multi-scaled polymersomes from self-assembly of octa

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