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通过熔融混炼成功制备了碳纳米管改性的复合粘结剂.扫描电镜显微照片显示,功能化的碳纳米管在粘结剂基体中能均匀分散,而未经处理的碳纳米管则有较严重的团聚.实验结果表明,功能化碳纳米管的加入能有效提高粘结剂的结晶度,从而将提高生坯的强度和保形性.此外,碳纳米管的加入对复合粘结剂的粘度影响不大,这样就可以既满足保形性要求的同时又不影响喂料的流动性.碳纳米管与粘结剂之间以非共价键连接,这样就可以既使粘结剂脱除干净又保留碳纳米管和金属粉末.综上所述,这种新型碳纳米管改性复合粘结剂适用于金属粉末的注射成形. 参考文献 [1]YANGJ,SCHALLERR.MechanicalspectroscopyofMgreinforcedwithAl2O3shortfibersandCnanotubes[J].MaterialsScienceandEngineeringA,2004,370(1/2):512-515. [2]孟飞,裴燕斌,果世驹.轧制对碳纳米管弥散强化铜基复合材料微观组织的影响[J].粉末冶金材料科学与工程,2005,10(1):55-58. [3]WALIDMD,BYUNGKL,CHANBM.Electricalandmechanicalpropertiesofcarbonnanotubereinforcedcoppernanocompositesfabricatedbyelectrolessdepositionprocess[J].MaterialsScienceandEngineeringA,2009,513/514:247-253. [4]CHASI,KIMTK,ARSHADSN,etal.Extraordinarystrengtheningeffectofcarbonnanotubesinmetalmatrixnanocompositesprocessedbymolecularlevelmixing[J].AdvMater,2005,17:1377-1381. [5]XULS,CHENXH,PANWY.ThermalexpansionofMWCNTreinforcedcoppercomposite[J].TransactionsofNonferrousMetalsSocietyofChina,2007,17:S1065-S1069. [6]MOBALLEGHL,MORSHEDIANJ,ESFANDEHM.Copperinjectionmoldingusingathermoplasticbinderbasedonparaffinwax[J].MaterialsLetters,2005,59(22):2832-2837. [7]SIDAMBEAAT,FIGUEROAIA,HAMILTONHGC,etal.MetalinjectionmouldingofCPTicomponentsforbiomedicalapplications[J].JournalofMaterialsProcessingTechnology,2012,212(7):1591-1597. [8]HUANGMS,HSUHC.Effectofbackbonepolymeronpropertiesof316LstainlesssteelMIMcompact[J].JournalofMaterialsProcessingTechnology,2009,209(15/16):5527-5535. [9]THOMASVIELMAP,CERVERAA,LEVENFELDB,etal.Productionofaluminapartsbypowderinjectionmoldingwithabindersystembasedonhighdensitypolyethylene[J].JournaloftheEuropeanCeramicSociety,2008,28(4):763-771. [10]TAOT,ZHANGL,MAJ,etal.Theproductionofflexibleandelectricallyconductivepolyethylenecarbonnanotubeshishkebabstructuresandtheirassemblyintothinfilms[J].Industrial&EngineeringChemistryResearch,2012,51(15):5456-5460. [11]PANB,XINGBS.Adsorptionmechanismsoforganicchemicalsoncarbonnanotubes[J].EnvironSciTechnol,2008,42(24):9005-9013. [12]ZHANGSJ,LINW,WONGCP,etal.Nanocompositesofcarbonnanotubefiberspreparedbypolymercrystallization[J].ACSApplMaterInterfaces,2010,2(6):1642-1647. [13]LILY,CHRISTOPHERY,LICY.Polymercrystallizationdriven,periodicpatterningoncarbonnanotubes[J].JAmChemSoc,2006,128(5):1692-1699. [14]CHEND,LIUTX,ZHOUXP,etal.Electrospinningfabricationofhighstrengthandtoughnesspolyimidenanofibermembranescontainingmultiwalledcarbonnanotubes[J].JPhysChemB,2009,113(29):9741-9748. |
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