简介：Polyvinylalcoholcoatedmagneticparticles（PVAferrofluids）havebeensynthesizedbychemicalco-precipitationofFe（Ⅱ）/Fe（Ⅲ）saltsin1.5mol/LNH4OHsolutionat70℃inthepresenceofPVA.Theresultantcolloidalparticleshavecore-shellstructures,inwhichtheironoxidecrystallitesformthecoresandPVAchainsformtheshells.Thehydrodynamicdiameterofthecolloidalparticlesisintherangeof108to155nm,whichincreaseswithincreasingPVAconcentrationfrom5wt%to20wt%.Thesizeofthemagneticcoresisca.5～10nm,whichisrelativelyindependentofPVAconcentration.Undertransmissionelectronmicroscopic（TEM）examination,themagneticcoresexhibitsomewhatirregularshapesvaryingfromspherical,oval,tocubic.MagnetometrymeasurementrevealedthatthePVAcoatedmagneticparticlesaresuperparamagnetic.Thesaturationmagnetizationof5wt%and20wt%PVAferrofluidsat300Kis54and49emu/g.respectively.AllthePVAferrofluidsexhibitedexcellentcolloidalstabilityinpurewaterandphosphatebuffersaline（PBS,pH=7.4）.Theferrofluidscanremainstableinabovesolutionsformorethanthreemonthsat4℃.

简介：Externalmagneticfieldincreasesthephoto-inducedpolymerizationrateofstyrenemicroemulsion.Thetypeofphotoinitiatorplaysanimportantrole.Thephotoinitiators,usedaredimethoxyphenylacetophenone(DMPA),1-hydroxycyclohexylphenylketone(Irgacure184)anddimethylhydroxyacetophenone(Darocur1173).Nomagneticeffectwasobservedbyusingdibenzylketone(DBK)asphotoinitiator.Themolecularweightofthepolymerisslightlyaffectedbymagneticfield.Theinfluenceoftemperaturehasalsobeeninvestigated.

简介：Anovelmethodforpreparationofpolymer-basedmagneticmicrosphereswasproposedbyutilizingmeltreactiveblending,whichwasbasedonselectivelocationofFe_3O_4nanoparticlesinPA6domainsofpolystyrene(PS)/polyamide6(PA6)immiscibleblends.ThemorphologyofPA6/Fe_3O_4compositemagneticmicrosphereswasstudiedbyscanningelectronicmicroscopy(SEM).Thecompositemagneticmicrospheresweresphericalwithadiameterrangeof0.5-8μm;thediameterwassharplydecreasedwithaverynarrowdistributionbyaddingterminalmaleicanhydridefunctionalizedpolystyrenes(FPS)forreactiveblending.Transmissionelectronmicroscopy(TEM)andthermogravimetryanalysis(TGA)resultsshowedthatmostofFe_3O_4waslocatedinthePA6microspheres.MagnetizationdatarevealedthemagnetitecontentofPA6/Fe_3O_4microsphereswasabout32wt%andthesaturationmagnetizationcouldbeupto17.2Am~2/kg.

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简介：一个容易的方法被介绍制作monodisperse磁性的macroporous聚合物祷告(MMPB)。Waterin-油高度内部阶段乳剂(抱起对方的大腿把他摔倒)被使乳化准备在包含单体的一个油阶段的水的铁离子答案。抱起对方的大腿把他摔倒被介绍进一台简单microfluidic设备制作monodisperse(water-in-oil)-in-water两倍乳剂微滴。微滴用作microreactors综合Fe<潜水艇class=“a-plus-plus”>3O<潜水艇class=“a-plus-plus”>4nanoparticles并且是联机polymerized形成MMPB。准备MMPB显示制服尺寸，互连的多孔的结构，superparamagnetic行为和Fe的一致分发<潜水艇class=“a-plus-plus”>3O<潜水艇class=“a-plus-plus”>在聚合物矩阵的4。MMPB被扫描电子显微镜学(SEM)描绘，Fourier变换红外线的光谱学(FTIR)，X光检查衍射(XRD)，传播电子显微镜学(TEM)，颤动的样品magnetometry(VSM)。我们相信这个方法是在准备macroporousnanocomposite祷告的一种通用技术。

简介：Thecarbon-13spin-spinrelaxationtimesoffluorine-containingionomersaremeasuredandmotionalcorrelationtimesτ_oandτ_darecalculatedbyusingVJGMmodel.Theresultsshowthatthemotionsofpolymermainchaininionomersbecomemoredifficultwithincreasingofionizationdegreeandcontentsoffunctionalgroup,anddependonthefinestructuresandstabilityofionicmicrodomains.

简介：TheeffectsofmagneticfieldonthegraftratioandstereoregularityofgraftsofPVA-g-MMAinthepresenceofbenzophenoneduringUVirradiationarediscussed.BymeansofIR,itwasfoundthatthegraftratiowasincreasedwiththeincrementofmagneticfieldstrength.Furthermore,applicationofrelativeweakmagneticfieldof0.4Teslahadbeenshowntosubstantiallyenhancethestereo-regularityofgraftcopolymer.Themaximumstereo-regularityappearedwhenthegraftratioapproachedto85%withthemagneticfieldof1.2Tesla(T).Theresistancetomoistureandheatresistanceofthegraftedcopolymerinthepresenceofmagneticfieldwerealsoimproved.

简介：指向nano探查基于的一个可被细菌破坏的肿瘤poly(?-caprolactone)-b-poly(ethylene乙二醇)有磁性的回声成像(MRI)的块共聚物(PCL-b-PEG)micellefunctionalized对比代理人diethylenetriaminepentaacetic酸金轧(DTPA-Gd3+)在壳上并且一在红外线附近(NIR)在为磁性的回声和光双形式的成像的核心的染料是准备。纵的relaxivity(r1)PCL-b-PEGDTPA-Gd3+，micelle是13.4(mmol/L)?1s?1，DTPA-Gd3+的三褶层，并且比有类似的结构的许多聚合对比代理人的高。在里面忍受xenografted胸肿瘤的一只裸体老鼠的光成像显示出的vivo双形式的micelle优先地经由folic在肿瘤积累了由提高的渗透和保留(EPR)效果的调停酸的活跃指向和被动累积。结果显示dualmodalitymicelle是为癌症察觉和诊断的有希望的nano探查。

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简介：这个工作报导杂环的functionalized聚合物的合成和描述，poly(triazole-etherimidazole)s(PTAEI)从终止dialkyne的混合物，3-(4,5二度(4-(propargyloxy)苯基)由使用按反应的-1H-imidazol-2-yl)-9-ethyl-9H-carbazole,。PTAEI被描绘并且他们的性质象溶解度那样，热，机械，photophysical和金属离子吸附被调查。这些聚合物让重量平均臼齿的群众(M<潜水艇class=“a-plus-plus”>在1910026700g/mol的范围的w)，在极的aprotic溶剂展出了优秀溶解度并且由答案扔形成了低有颜色的灵活薄电影方法。他们与玻璃转变温度展出了好热稳定性(T<潜水艇class=“a-plus-plus”>在160之间的g)??????????千偓???????????????????吗？？