Discussion Overview
The discussion revolves around identifying a Bingham plastic that is not a suspension, focusing on its properties, potential formulations, and the requirements for its application. Participants explore the characteristics needed for the liquid, including yield stress, viscosity, and stability over time.
Discussion Character
- Exploratory, Technical explanation, Debate/contested
Main Points Raised
- One participant seeks a Bingham plastic with a yield stress between 150 Pa and 250 Pa, either as an additive to water or a non-conductive chemical.
- Another participant asserts that the example being discussed does not involve a Bingham plastic but rather a suspension.
- A participant questions the definition of "suspensions," suggesting that clarity on particle size is necessary for the discussion.
- Requirements for the liquid include stability in a system of tubes without separation for weeks, a lifetime of at least one year, and low viscosity. Long-chained silicon oil with polar side chains is proposed as a potential candidate.
- There is a discussion about the meaning of "low viscosity," with one participant asking for clarification on what constitutes low versus high viscosity in this context.
- Another participant emphasizes the need for low viscosity while maintaining the correct yield stress, prompting further inquiry about the upper limits of viscosity acceptable for their needs.
- A participant suggests that viscosity should be a maximum of a few hundred centistokes.
Areas of Agreement / Disagreement
Participants express differing views on the classification of materials as Bingham plastics versus suspensions, indicating a lack of consensus on definitions and examples. The discussion remains unresolved regarding the specific liquid that meets all outlined criteria.
Contextual Notes
Participants have not reached a consensus on the definitions of suspensions and Bingham plastics, nor have they established clear parameters for viscosity and yield stress in relation to their requirements.