测量颜料颗粒的质量和直径 - 迈向通用尺寸标准.pdf

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1、femtoG.comFranz Friebel,Dr.sc.ETH ZrichFranz.friebelfemtoG.com/+41 76 520 29 70 Mass and Diameter of Pigment Particles-Towards a Universal Size StandardOne size standard fits all?What is the true particle size?2SEM/TEMSEM/TEM 2D solution for a 3D problemOptical measurementsOptical measurements Refra

2、ctive index?Multiple components?Sedimentation analysisSedimentation analysis Particle packing density?Take home message:The mass is a well-defined,fundamental and intrinsic property of a particle.Unlike the many equivalent diameters,the particle mass is independent of the measurement principle and i

3、nstrument.Colour pigments have masses of 1 to 200 femtogram (10-15g;fg)iron yellow pigment-FeOOHrecycled carbon blackiron red pigment Fe2O3iron black pigment Fe3O4white pigment TiO2/anatasecoated FeOOHWhat is a particle?Sample preparation!The preparation of a sample material prior to any particle si

4、ze The preparation of a sample material prior to any particle size analysis defines which structural level will be detected.analysis defines which structural level will be detected.Dry dispersionDry dispersion Powder Aerosolization Deagglomeration in Venturi nozzlesWet dispersionWet dispersion Suspe

5、nsion sonification 10 500 J/ml Spray dispersion working fluids:water,ethanol,acetone,hexaneDirect sampling from reactorDirect sampling from reactor3Primary Primary particlesparticlesAggregatesAggregatesAgglomeratesAgglomeratesCentrifugal Particle Mass AnalyzerCentrifugal Particle Mass AnalyzerCentri

6、fugal force vselectrostatic forcesParticleParticle mobilitymobility sizesize analyzeranalyzerElectrostatic forces vsdrag force4+Sheath air flowParticlecounterParticleflowExhaustParallel analysis of mass and diameterBase data and the femtoG fingerprint 5Measurement:+10 minutes10 minutes per scan+6006