资源描述：
《微胶囊相变材料的制备》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、南京工业大学硕士学位论文微胶囊相变材料的制备姓名：尚红波申请学位级别：硕士专业：材料学指导教师：徐玲玲20060601囊化后，作为稳定的相变材料，具有良好的应用前景。关键词：相变材料微胶囊硬脂酸丁酯十二醇建筑节能IIABSTRACTHowtopackagesolid/liquidPhaseChangeMaterialisthekeyfactorforitscommercialapplication.Themicro-encapsulationtechnology,includingthecoreand
2、theshellmaterials，differentsignificantsynthesizeprocess,variouscharacterizationmethodsarestudiedinthisthesis.Themicroencapsulatedphasechangematerialswerepreparedusingdodecanolasthecore,urea-formaldehyderesinastheshell,andSMA(styrene-maleicanhydride)resi
3、nasthesurfactantbyin-situpo1ymerization.Theinfluenceofmolecular-weightofSMAresinonmicroencapsulatedtechnologywerethatmolecular-weightof40,000wasofbesteffect.DifferentpropertiesofthemicroencapsulatedphasechangematerialswerecharacterizedbyFT-IR,DSC,LaserP
4、articleSizeAnalyzer,OMandSEM.Whentheshellwasurea-formaldehyderesincombinewithmelmac,theyieldofMPCMincreasedfrom50percenttoabove90percent.Withtheshellofpolyurearesinandthecoreofbutylstearate,microencapsulatedphasechangematerialswerepreparedbyinterfacialp
5、olymerizationforthermalenergystorageapplication.Differentkindsofsurfactants,suchaspolyoxyethyleneoctylphenyl-10(OP-10)andsodiumalginate,anditsdosagewereinvestigatedinordertocleartheemulsifyeffect.WhenthesurfactantisOP-10,0.5gram,itwillbethebesteffecttom
6、icroencapsulation.ThegrainsizeofMPCMisequalityanditsdistributionisnarrow.OpticalmicrophotographandSEMphotographofmicrocapsulesappearhomogeneousparticles.TheresultsofDSCshowedthatthemeltingpointandheatoffusionofmicroencapsulatedbutylstearatewas29.37℃and8
7、5.92kJ/kgwhenthem(core)vs.m(shell)equaled3:1.Theheatcapabilitywasthebestthanotherm(core)vs.m(shell).Theycanremainconstantaftersuffering400cooling-heatingcycles.Theeffectofdifferentdosageofthesurfactantwasanalyzedbythedryweightofmicrocapsule.Thepenetrabi
8、lityofthemicrocapsulewascharacterizedwellinwater,tolueneandethanolby721spectrophometer.Polyurethanemicrocapsulescontainingphasechangematerialswerepreparedbyinterfacialpolymerizationinanemulsionsystem.Toluene-2,4-diisocyanate(TDI)
