| 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.