简介：Asupercriticalcarbondioxide(ScCO2)assistedphaseinversionwasdevelopedtoproducemicroporouspoly(vinylidenefluoride)(PVDF)membraneswhosemorphologycharacteristicsarisefrombothliquid-liquiddemixingandsolid-liquiddemixing(crystallization).ThisresultwasconfirmedbyFouriertransforminfraredspectroscopy(FTIR),fromwhichbothαandβcrystalswerefound.Asrevealedbycontactangleexperiment,thePVDFmembranespreparedviaScCO2assistedphaseinversionweremorehydrophobiccomparedwiththecontrolmembraneproducedviaconventionalimmersionprecipitationtechnique.Inparticular,thesamplewith15wt%PVDFpreparedat45°Cand13MPaexhibitedacontactangleof142°,whichwasmainlycausedbythemultilevelmicro-andnano-structure.Theeffectsofpolyethyleneglycol(PEG),polyvinylpyrrolidone(PVP)andlithiumchloride(LiCl)onthestructuresandcrystalformwereinvestigated.PVPpromotedtheformationofβphasecrystalform,whilePEGbooststheevolutionofαphase.LiClrestrainedthecrystallizationdegreeofPVDFmembraneunderScCO2.

简介：Metalion-imprintedlycrosslinkedchitosanresin1andresin2werepreparedbytheuseofCu^2+andNi^2+astemplateionsandglutaraldehydeascrosslinkingagent,respectively,ThroughinvestigationontheadsorptioncapactiesandbindingconstantsforCu^2+,Ni^2+andCo^2+ionsonchitosanresins,resin1andresin2exhibittheadsorptionselectivityforthemixturesolutionof1L1Cu^2+andNi^2+ions.Theadsorptionselectivityofmetalion-imprintedresinsfortheirtemplateionsinmuchhigherthanthatofuncrosslinkedchitosanresin.

简介：Thisworkdealswiththekineticsofco-condensationpolymerizationofAB2andABmonomers,givingexpressionsofthetwo-dimensionalmolecularweightdistributionfunctionandthenumber/weightaveragemolecularweightsoftheresultingcopolymers.Thetwo-dimensionalmolecularweightdistributiondependsontwoindices,nandl,whicharetherespectivenumbersofAB2andABunitsinacopolymerspecies.Theevolutionofthetwo-dimensionalweightandzdistributionsduringtheco-condensationpolymerizationhasbeenevaluatedsystematically.Finally,thetwo-dimensionaldistributionwastransformedintoaone-dimensionalmolecularweightdistributionwithonlyonevariable(themolecularweightoftheproductsinsteadofthedegreeofpolymerization).Thecalculatedresultsshowthatthehighlybranchedcopolymerhasaverybroadmolecularweightdistributionwhentheco-condensationpolymerizationapproachescompletion.

简介：poly包括的合成聚合物电解质(用户终端设备)(vinilydenefluoride-hexafluoro丙烯)，PVDF-co-HFP和锌triflate，Zn(CF3有改变ZrO2nanofillers的集中的3)2被与N扔技术的答案因此准备，N-dimethylformamide(DMF)作为普通溶剂。有特别作文的聚合物电解质标本75wt%PVDF-co-HFP：7wt%ZrO2显示出的25wt%ZnTf+4.6的最高的传导性??????????????€潰祬???????畃????猯灵？？

简介：利用methoxysilyl一半的水解作用和冷凝作用，器官无机的混血儿(N-isopropylacrylamide-co-acrylamide-co-3-(trimethoxysilyl)propylmethacrylate)poly，P(NIPAM-co-AM-co-TMSPMA)microgels经由二个不同方法被准备。第一个方法是microgels是从crosslinkable的fabricated以后线性P(NIPAM-co-AM-co-TMSPMA)terpolymer在terpolymer的更低的批评答案温度(LCST)上面的水的答案。为第二个方法，microgels被常规表面活化剂直接综合NIPAM，AM，和TMSPMA的免费乳剂copolymerization。结果的P(NIPAM-co-AM-co-TMSPMA)microgels的水动力学直径和稳定性强烈取决于microgel的pH和温度水的答案。microgels的水动力学直径与增加测量温度减少了。microgels的阶段转变温度被发现在34附近吗？？

简介：

简介：

简介：Twoaromaticco-polyamidesweresynthesizedcombiningtwodiacidmonomerscontainingbulkypendantgroups,5-(9,10-dihydro-9,10-ethanoanthracene-ll,12-dicarboximido)isophthalicacid(DEAIA)and5-tert-butylisophthalicacid(TERT),with4,4f-(hexafluoroisopropylidene)dianiline(HFA)or2,3,5,6-tetramethyl-l,4-phenylenediamine(Durene)bydirectpolycondensation.Thestructuresoftheobtainedaromaticco-polyamideswereconfirmedbyFTIR,Ramanand'H-NMR.Theco-copolyamidefilms,DHTHandDDTD,exhibitedrms-roughnessvaluesbetween0.94and1.60nm,respectively.Moreover,theypresentedgoodthermalstabilityupto300℃.Young'smodulioftheco-polyamidefilmswerebetween4.1and4.3GPa.X-raydiffractionresultsshowedthattheco-polyamidefilmswereamorphousduetotheincorporationofbothbulkypendantgroups,tert-b\xty\anddibenzobarrelene.Thecombinationofbulkypendantgroupsprovidedintrinsicallytransparentco-polyamidefilmswithatransmittancehigherthan88%intherangeof400-780nm.Duetotheseoutstandingfilmandopticalproperties,theyaresuggestedtobeflexiblesubstratesinapplicationsforsolarcellandotherportableelectronicdevices.

简介：Fourpolymer-supportedFe-Cotetrametallicclustershavebeenpreparedbyionexchangeandligandexchange.TheirstructureswerecharacterizedbyIR,UV/visiblediffusereflectancespectraandelementalanalysis,andbyanalogywiththereferenceclusterPhCH2NMe3FeCo3（CO）2.Thefourheterogenousclusterswereefficientcatalystsinthehydroformylationof1-hexene,turnovernumbersamountedto823—924withtheyieldof83.2—92.4%heptylaldehydesandratiosofnormalaldehydetoiso-aldehydeof1.2—1.6,theyarefacilitatedformingthenormalaldehydeincomparisonwiththehomogeneousanalogue.Forthepolymer-supportedclusterspreparedbyionexchange,thepolymer-cationpartshadnoobviouseffectontheactivityoftheclusteranion.Thepolymer-phosphinesubstitutedclusterpreparedbyligandexchangewasmorestablethantheclusterspreparedbyionexchange.

简介：

简介：

简介：Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/Organophilicmontmorillonite(PHBV/OMMT)nanocompositeswerepreparedandthebiodegradabilityofthePHBV/OMMTnanocompositeswasstudiedbyacultivationdegradingmethodinsoilsuspension.TherelationshipbetweenstructureandbiodegradabilityofPHBV/OMMTnanocompositeswasinvestigated.TheresultsshowedthatthebiodegradabilityofPHBV/OMMTnanocompositesdecreasedwithincreasingamountofOMMTanditwasrelatedtothenumberofPHBVdegradingmicroorganismsindegradationenvironment,theanti-microbialpropertyofOMMTandthedegreeofcrystallinityofthenanocomposites.

简介：Synthesisofsuperabsorbentofstarch-graft-poly(patassiumacrylate-co-acrylamide)hasbeenstudiedbyinversesuspensionpolymerization.Inthispaper,theeffectsofreactionconditions,suchas,monomericconcentration,theamountofcross-linkingagent,ratioofwatertooil,reactiontemperatureandthebestconditionbeingabletoobtainthesphericalresinwereinvestigated.Experimentsshowthatthewater-absorbingresinisstrongandcapableofresistingpressureofretainwater.Itkeepstheshapeofparticlesafterabsorbingwater.Aftermixingwithsoil,itdoesnotbecomesticky,andthecoosstructurecanbetterretainair.Itjustfitagricultureandforest.Inaddition,thermogravimetricanalysisrevealedthesuperiorthermalstabilityofthegraftedproduct,anditslargesizeparticlesalsoreducesriskofairpollution.

简介：electrospun(lactide-co-glycolide)(PLGA)poly，膜被准备并且过去常执行跟腱的反粘附。在整个实验，膜显示出适当降级率，并且降级媒介的pH价值在约7.4点被维持。同时，在vitro并且在vivo的膜的优秀biocompatibility被实时/死了、组织病理学说的分析证实。同时，膜能显著地减少腱粘附并且有效地支持功能的恢复。令人鼓舞的结果被hematoxylin和曙红(H&E)进一步表明，并且Massons三色的染色，和类型我骨胶原immunohistochemical分析。没有处理，与electrospunPLGA膜对待的模型比那关于粘附预防和织物修理显著地更好，这被结束。就降级和粘附预防功效的结果而言，electrospunPLGA膜将是手术后的腱粘附的预防的一个大候选人。

简介：Fromaneconomicalpointofviewboththequalityoftheionexchangeresinsandthetechnologyusedinthefieldofindustrialwatertreatmentareimportantforasuccessfulperformance.Ingeneral,twodifferenttechnologieshavebeenestablishedonthemarket:ThemaindiffernecesbetweentheCO-andcountercurrenttechnologeswillbediscussedanddataconcerningtherequirementofchemicalsforregenerationandthequalityofthedeionizedwaterwillbeopposed.Inadditionseveraldifferentvarietiesofthemoderncountercurrenttechnologies,developedandpatentedbyBayerAG,willbedescribedandtheadvantages,dependingontheapplicationandthedemandonthequalityofthedeionizedwater,pointedout.Inviewofstrongerregulationsconcerningtheconsumptionofregenerationchemicals,andwastewater,andalsobecauseofthesuperiorqualityoftheproducedwater,themarketshareofcountercurrenttechnologieswillcontinuetoincreaseworld-wide.

简介：

简介：Cationic乳胶与cationic表面活化剂通过苯乙烯(圣)和丁基acrylate(BA)的乳剂copolymerization被准备，cetyltrimethyl铵溴化物(CTAB)。包括粒子尺寸，乳胶性质缩放分发，潜力，表面紧张和单体变换，为与不同CTAB数量准备的乳胶被决定。这些性质的进化在乳剂聚合期间被跟随以便理解粒子形成的机制。结果证明粒子尺寸和潜力是聚合时间和乳胶固体的功能。有cationic的平行乳剂聚合，anionic控告了开始者，没有费用的开始者也被执行，乳胶性质在不同聚合时间被决定。所有这些结果专心地基于乳剂聚合，表面活化剂吸附和乳胶粒子稳定的机制被解释。

简介：

简介：Thehybridstructuresofpolystyrene-b-poly(ethyleneoxide)(PS-b-PEO)blockcopolymerandinorganicnanoparticleswithgoodstabilityandbiocompatibilityhavepotentialapplicationsindrugdeliveryandbioimaging.Sphericalco-assembliesofPS120-b-PEO318andoleylamine-cappedCdSquantumdots(QDs)areproducedsuccessfullyinthisworkbyaddingwatertoamixedcommonsolvent,suchasN,N-dimethylmethanamide(DMF)/chloroform,DMF/tetrahydrofuran(THF),orDMF/toluene.TheenergydispersiveX-ray(EDX)spectrumindicatesthatQDsarelocatedattheinterfacebetweenthecoreandshellofthesphericalco-assemblies.Theco-assemblyprocessduringwateradditionistracedbytransmissionelectronmicroscopy(TEM)andturbiditymeasurement.Sphericalco-assembliesareformedthroughbuddingfrombilayersoftheblockcopolymerandQDs.Themorphologyoftheco-assembliesisrelatedtothemiscibilityoftheQD-dispersingsolventswithwaterandthemorphologychangesfromasphericaltoavesicle-likestructurewithDMF/toluene.IncreasingTHFcontentinthemixedsolventcausesmorphologicaltransitionsfromsphericalco-assembliestomulti-branchedcylindersandmicelleswhereQDsarelocatedinthecentralcore.Increasingchloroformcontentyieldsvesicle-likestructureswithprotrudingrodsonthesurface.Themechanismofthemorphologicaltransitionsisalsodiscussedindetail.

简介：Polymerizable离子的液体共聚物PMMA-co-BVIm-Br被激进的聚合技术综合，并且由Fourier变换描绘了红外线的spectrometryFTIR，<啜class=“a-plus-plus”>1H原子磁性的回声<啜class=“a-plus-plus”>1H-NMR和胶化浸透层析GPC。产生共聚物被用来经由一个阶段倒置方法准备polyvinylidene氟化物PVDF混合膜。多型性，表面wettability和混合膜的希腊语的第六个字母潜力上的共聚物的效果被ATR-FTIR，接触角度仪器和希腊语的第六个字母潜力分析器调查。扫描电子显微镜学SEM和SEMedition也被使用调查形态学和制作的膜的表面元素变化。结果显示那PMMA-co-BVIm-Br共聚物在让混合膜在试验性的pH范围期间有积极表面的膜的表面上存在。共聚物也赞成在PVDF膜的水晶阶段的形成。接触角度实验显示那PMMA-co-BVIm-Br共聚物能交换混合膜的wettability从对吸水由交换Br恐水病<啜class=“a-plus-plus”>有PF的阴离子<潜水艇class=“a-plus-plus”>6<啜class=“a-plus-plus”>。与纯PVDF膜相比，混合膜的水流动和水恢复流动显然被提高。从流动恢复比率FR和全部的犯规比率R的结果<潜水艇class=“a-plus-plus”>t都建议混合膜有好犯规反的性质。