本文由 上?？茖W(xué)儀器有限公司 整理匯編

2018-08-31 10:11 581閱讀次數(shù)

收藏 評價 舉報

• 分享

立即下載

參與評論

評論

登錄后參與評論

登錄或新用戶注冊

• 微信登錄
• 密碼登錄
• 短信登錄

請用手機(jī)微信掃描下方二維碼
快速登錄或注冊新賬號

微信掃碼，手機(jī)電腦聯(lián)動

注冊登錄即表示同意《儀器網(wǎng)服務(wù)條款》和《隱私協(xié)議》

賬  號：

密  碼：

圖片碼： 看不清？
換一張？

手機(jī)和郵箱號注冊新賬號>> 忘記密碼？

手機(jī)號：

圖片碼： 看不清？
換一張？

短信碼： 獲取短信碼

手機(jī)和郵箱號注冊新賬號>> 忘記密碼？

更多資料

• Aggregation Kinetics of Multiwalled Carbon Nanotubes in Aquatic Systems: Measurements and Environmen

  作者：NAVIDB.SALEH,LISAD.PFEFFERLE,ANDMENACHEMELIMELECH　?。―epartmentofChemicalEngineering,YaleUniversity,NewHaven,Connecticut06520-8286）　　摘要：Theinitialaggregationkineticsofmultiwalledcarbonnanotubes（MWNTs）wereexaminedthroughtime-resolveddynamiclightscattering.AggregationofMWNTswasevaluatedbyvaryingsolutionpHandtheconcentrationofmonovalent（NaCl）anddivalent（CaCl2andMgCl2）salts.SuwanneeRiverhumicacid（SRHA）wasusedtostudytheeffectofbackgroundnaturalorganicmatteronMWNTaggregationkinetics.IncreasingsaltconcentrationandadditionofdivalentcalciumandmagnesiumionsinducedMWNTaggregationbysuppressingelectrostaticrepulsion,similartoobservationswithaquaticcolloidalparticles.Thecriticalcoagulationconcentration（CCC）valuesforMWNTswereestimatedas25mMNaCl,2.6mMCaCl2,and1.5mMMgCl2.AnincreaseinsolutionpHfromacidic（pH3）tobasic（pH11）conditionsresultedinasubstantial（over2ordersofmagnitude）decreaseinMWNTaggregationkinetics,suggestingthepresenceofionizablefunctionalgroupsontheMWNTcarbonscaffold.ThepresenceofhumicacidinsolutionmarkedlyenhancedthecolloidalstabilityofMWNTs,reducingtheaggregationratebynearly2ordersofmagnitude.TheenhancedMWNTstabilityinthepresenceofhumicacidisattributabletostericrepulsionimpartedbyadsorbedhumicacidmacromolecules.OurresultssuggestthatMWNTsarerelativelystableatsolutionpHandelectrolyteconditionstypicalofaquaticenvironments.[詳細(xì)]

  2018-08-31 10:11

  產(chǎn)品樣冊

  |

  • 
  • 
  • 
  • 

• Aggregation Kinetics of Citrate and Polyvinylpyrroli

  Aggregation Kinetics of Citrate and Polyvinylpyrroli[詳細(xì)]

  2024-09-27 23:57

  標(biāo)準(zhǔn)

  |

  • 
  • 
  • 
  • 

• a comparison of raman analysis of carbon nanotubes

  a comparison of raman analysis of carbon nanotubes[詳細(xì)]

  2024-09-28 14:24

  實驗操作

  |

  • 
  • 
  • 
  • 

• A study of single-wall carbon nanotubes using Renish

  A study of single-wall carbon nanotubes using Renish[詳細(xì)]

  2024-09-28 01:25

  期刊論文

  |

  • 
  • 
  • 
  • 

• Carbon Nanotubes Based Nanoelectrode Arrays Fabrication

  Carbon Nanotubes Based Nanoelectrode Arrays Fabrication[詳細(xì)]

  2024-09-28 00:38

  操作手冊

  |

  • 
  • 
  • 
  • 

• Aggregation Kinetics of Citrate and Polyvinylpyrrolidone Coated Silver Na in Monovalent and Divalent

  Theaggregationkineticsofsilvernanoparticles(AgNPs)thatwerecoatedwithtwocommonlyuseagentscitrateandpolyvinylpyrrolidone(PVP)wereinvestigated.Time-resolveddynamiclight(DLS)wasemployedtomeasuretheaggregationkineticsoftheAgNPsoverarangeofmonovalenelectrolyteconcentrations.Theaggregationbehaviorofcitrate-coatedAgNPsinNaClwasinexcelwiththepredictionsbasedonDerjaguinLandauVerweyOverbeek(DLVO)theory,andtheHamofcitrate-coatedAgNPsinaqueoussolutionswasderivedtobe3.7×10J.Divalentelectrolytesefficientindestabilizingthecitrate-coatedAgNPs,asindicatedbytheconsiderablylowercriticalcconcentrations(2.1mMCaCland2.7mMMgClvs.47.6mMNaCl).ThePVP-coatedAgNPswsignificantlymorestablethancitrate-coatedAgNPsinbothNaClandCaCl,whichislikelyduetorepulsionimpartedbythelarge,non-chargedpolymers.Theadditionofhumicacidresultedinthethemacromoleculesonbothcitrate-andPVP-coatedAgNPs.TheadsorptionofhumicacidinduceelectrostericrepulsionthatelevatedthestabilityofbothnanoparticlesinsuspensionscontainingNaconcentrationsofCaCl.Conversely,enhancedaggregationoccurredforbothnanoparticlesathighconcentrationsduetointerparticlebridgingbyhumicacidclusters.[詳細(xì)]

  2018-08-31 10:11

  產(chǎn)品樣冊

  |

  • 
  • 
  • 
  • 

• Effective reinforcement in carbon

  Effective reinforcement in carbon[詳細(xì)]

  2024-09-14 19:10

  標(biāo)準(zhǔn)

  |

  • 
  • 
  • 
  • 

• Vapor-phase adsorption kinetics of 1-decene

  Vapor-phase adsorption kinetics of 1-decene[詳細(xì)]

  2006-01-13 00:00

  實驗操作

  |

  • 
  • 
  • 
  • 

• Kinetics of nucleation and crystallization in poly

  Kinetics of nucleation and crystallization in poly[詳細(xì)]

  2014-01-28 00:00

  期刊論文

  |

  • 
  • 
  • 
  • 

• Kinetics of the Heterogeneous Reaction of HNO3 with

  Kinetics of the Heterogeneous Reaction of HNO3 with[詳細(xì)]

  2024-09-19 23:59

  報價單

  |

  • 
  • 
  • 
  • 

• Determination of the kinetics of the reaction of CCl

  Determination of the kinetics of the reaction of CCl[詳細(xì)]

  2024-09-14 07:13

  應(yīng)用文章

  |

  • 
  • 
  • 
  • 

• The Aggregation of Hydrophobically Modified Polysacc

  The Aggregation of Hydrophobically Modified Polysacc[詳細(xì)]

  2024-09-28 15:33

  標(biāo)準(zhǔn)

  |

  • 
  • 
  • 
  • 

• The Aggregation of Hydrophobically Modified Polysacc

  The Aggregation of Hydrophobically Modified Polysacc[詳細(xì)]

  2024-09-29 01:59

  應(yīng)用文章

  |

  • 
  • 
  • 
  • 

• EIS measurements with multisine

  EIS measurements with multisine[詳細(xì)]

  2008-10-30 00:00

  應(yīng)用文章

  |

  • 
  • 
  • 
  • 

• Stability and Aggregation of Metal Oxide Nanoparticl

  Stability and Aggregation of Metal Oxide Nanoparticl[詳細(xì)]

  2014-09-10 00:00

  專利

  |

  • 
  • 
  • 
  • 

• SEC-MS for the Analysis Aggregation in Protein Mixtu

  SEC-MS for the Analysis Aggregation in Protein Mixtu[詳細(xì)]

  2024-09-28 14:37

  選購指南

  |

  • 
  • 
  • 
  • 

• Precautions for good impedance measurements

  Precautions for good impedance measurements[詳細(xì)]

  2008-10-29 00:00

  安裝說明

  |

  • 
  • 
  • 
  • 

• Fluorescence Top Measurements with Z-focusing

  Fluorescence Top Measurements with Z-focusing[詳細(xì)]

  2010-04-28 00:00

  產(chǎn)品樣冊

  |

  • 
  • 
  • 
  • 

• Measurements of the double layer capacitance

  Measurements of the double layer capacitance[詳細(xì)]

  2024-09-28 09:18

  報價單

  |

  • 
  • 
  • 
  • 

• Contact Angle Measurements on Glass

  Contact Angle Measurements on Glass[詳細(xì)]

  2024-09-28 00:08

  其它

  |

  • 
  • 
  • 
  •