How to characterize and optimize inkjet inks Part 2

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00:00:00 Welcome
00:02:04 How to Characterize and Optimize Inkjet Inks PART 2: Keeping you in suspense! Evaluating and improving dispersion stability
00:02:38 Contents
00:03:56 Dispersion/Suspension stability
00:05:33 How to achieve this?
00:06:45 Which method? ……….It depends!!
00:09:46 Colloidal stability
00:11:00 Colloidal stability and DLVO Theory
00:13:17 Colloidal stability by steric means
00:15:09 Examples
00:19:37 Advantages/Disadvantages
00:22:18 Case Study
00:23:26 Silica dispersion stability
00:24:10 Particle size and density
00:24:44 Force balance on particle
00:25:52 How to achieve this?
00:26:11 Effect of Viscosity (dilute systems)
00:27:35 Effect of Viscosity (concentrated systems)
00:29:08 Maintaining performance and functionality
00:30:36 Additives for increasing low shear Viscosity
00:31:40 Effect of zeta potential on low shear viscosity
00:32:42 How to achieve this?
00:33:21 Colloidal stability and DLVO theory
00:35:12 Forces in a stable dispersion
00:36:18 Zeta Potential
00:36:44 Rheology of dispersions at different pH
00:38:01 Yield Stress ramp test
00:39:28 Yield Stress
00:40:15 What Yield Stress is sufficient?
00:41:27 Does my sample have a yield stress?
00:41:39 Does my sample have a yield stress?
00:42:18 What Yield Stress is sufficient?
00:44:08 How to achieve this?
00:44:28 Summary – How to achieve stable dispersions
00:46:50 The End
00:47:04 Any Questions?

Achieving product stability is a critical aspect of ink formulation. Modern inks are typically colloidal suspensions of multiple components in an organic or aqueous continuous phase. The functionality of the finished product relies on maintaining suspended ingredients in a dispersed state, for the life time of the ink, under all the conditions that will be encountered. In this webinar we discuss the key factors governing dispersion stability (resistance to aggregation and sedimentation) and the various options and tools available for enhancing and predicting it.