资源描述：
《nature-High-water-content_mouldable_hydrogels_by_mixing_clay_and_a_dendritic_molecular_binder》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、Vol463
2、21January2010
3、doi:10.1038/nature08693LETTERSHigh-water-contentmouldablehydrogelsbymixingclayandadendriticmolecularbinder11,234411QigangWang,JustinL.Mynar,MasaruYoshida,EunjiLee,MyongsooLee,KouOkuro,KazushiKinbara1,2&TakuzoAidaWiththeworld’sfocusonreducingourdepende
4、ncyonfossil-fuelmotivatedustocrosslinkCNSswithGn-binder(Fig.2c),asthe13energy,thescientificcommunitycaninvestigatenewplasticmaterialsnanosheetsurfacesarefullofoxyanions.BecauseGn-bindercarriesthataremuchlessdependentonpetroleumthanareconventionaladhesivedendronunitsatboth
5、terminiofalong,hydrophilicPEG21plastics.Givenincreasingenvironmentalissues,theideaofreplacingspacer(number-averagemolecularweight,Mn510,650gmol),weplasticswithwater-basedgels,so-calledhydrogels,seemsreasonable.expectedthatthenanosheetscouldbeboundtogethertoforma3DHerewere
6、portthatwaterandclay(2–3percentbymass),whennetworkinwater(Fig.2c).mixedwithaverysmallproportion(,0.4percentbymass)ofAsdescribedinMethodsSummary,thehydrogelcanbepreparedorganiccomponents,quicklyformatransparenthydrogel.Thisquickly(3min)byaddingaverysmallproportionofG3-bind
7、ermaterialcanbemouldedintoshape-persistent,free-standingobjects(0.15%)toastirredaqueoussolutionofCNSs(2.0%)pretreatedowingtoitsexceptionallygreatmechanicalstrength,andrapidlyandwithASAP(0.06%)(chargeratio(expressedintermsofthemolarcompletelyself-healswhendamaged.Furthermo
8、re,itpreservesbio-concentrationsofchargedgroups),[CNSs(negative)]/[G3-binder1logicallyactiveproteinsforcatalysis.Sofarnootherhydrogels,(positive)]/[ASAP(negative)]518.0/2.0/6.0mM;Fig.2a–h).TheincludingconventionalonesformedbymixingpolymericcationsgelcanalsoformwithoutASAP
9、,butadecreaseinmechanical2,34andanionsorpolysaccharidesandborax,havebeenreportedtostrengthresults.LateradditionofASAPdoesnotenhancethemech-possessallthesefeatures.Notably,thismaterialisformedonlybyanicalstrength.ExfoliationandhomogeneousdispersionofCNSsbynon-covalentforce
10、sresultingfromthespecificdesignofatelechelicASAP,asvisualizedusingcryogenictransmissionelectronm
