chapter 12 colloids and macromolecules 12.1 colloids dispersed system dispersed phase dispersed...

Download Chapter 12 Colloids and macromolecules 12.1 Colloids Dispersed system Dispersed phase Dispersed medium Colloid dispersed system: 1-1000nm(10 -9 ~ 10 -6

Post on 04-Jan-2016

225 views

Category:

Documents

5 download

Embed Size (px)

TRANSCRIPT

  • Chapter 12 Colloids and macromolecules12.1 ColloidsDispersed systemDispersed phaseDispersed mediumColloid dispersed system: 1-1000nm(10-910-6m)Coarse dispersed system: >1m(10-6m)

  • Table 12-1Classfication of Dispersed System

    Dispersed phase

    Dispersed medium

    Generally called

    e.g.

    Gas

    Liquid

    Foam

    Liquid

    Liquid

    Emulsion

    Milk and crude oil with water

    Solid

    Liquid

    Colloids or suspension

    Silver gel, printing ink and slurry, paints.

    Gas

    Solid

    Solid foam

    Zeolite, foam.

    Liquid

    Solid

    pearl

    Solid

    Solid

    Plastic with color

    Liquid

    Gas

    Aerosol

    fog

    Solid

    Gas

    Suspension

    Smoke and dust

  • 12.2 Properties of Colloid12.2.1 Tyndall Phenomena

  • 12.2.2 Movement Properties of ColloidFicks first law of diffusion(1) Diffusion

  • (2) SedimentationSedimentation equilibrium

  • 12.2.3 The electrical double layer2

  • 12.2.4 Structure of ColloidsAgNO3 +KI AgI

  • 12.2.5 Stabilization of Colloid1. The effect of electrolyte on coagulationCoagulation valueSchulze--Hardy rule2. The effect of macromolecules on coagulationbridging effectdehydration effectelectric neutralization effect

  • 12.2.6 DLVO theory

  • 12.3 MacromoleculesMacromoleculeMB>1104kg.mol-112.3. 1 Osmotic Pressure of Macromolecules Solution

  • 12.3. 2 Membrane Equilibrium

  • At equilibriumFor dilute solution

  • 12.3. 3 Viscosity of Macromolecular SolutionRelative viscosityIntrinsic viscosity

  • 12.4 Coarse Dispersed System12.4.1 Emulsion

  • Emulsifier Demulsification12.4.2 Foam 12.4.3 Suspension

Recommended

View more >