Water-Dispersible Polymer Cooling via Ion Exchange Barrier
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Solution Overview
Problem
Current methods for cooling and pelletizing water-dispersible polymer-based materials are inefficient, as water-based baths cause dispersion, while alternative methods like continuous cooling belts are costly and environmentally hazardous, and solvent-based methods pose environmental risks.
Innovation Solution
A method involving a water-based bath with multivalent salts dissociated into cations and anions, where monovalent cations on the surface of the polymer are exchanged with multivalent cations to form a barrier, preventing dispersion and allowing quick cooling and pelletization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If water-based bath is used for cooling and pelletizing, then cooling efficiency is improved, but water-dispersible polymers disperse in the water bath
Solution Approach 1:
A water-soluble polymer additive is introduced as an intermediary substance in the water bath. This additive preferentially interacts with the water-dispersible polymer, forming a complex that prevents direct dispersion into the water bath while allowing efficient heat transfer. The additive acts as a mediator between the polymer and water, enabling cooling without unwanted dispersion.
Solution Approach 2:
The chemical composition parameters of the water bath are modified by adding water-soluble polymer additives at controlled concentrations. This changes the bath's properties to be less favorable for polymer dispersion while maintaining its heat transfer capabilities. The additive concentration is optimized to prevent dispersion during the cooling process.
2Stability of the object's composition
If continuous cooling belt is used, then polymer dispersion is prevented, but equipment cost and footprint increase
Solution Approach 1:
The cooling function is extracted from complex mechanical equipment (continuous cooling belts) and transferred to a simple water bath system. By using a water-soluble polymer additive in the bath, the system achieves dispersion prevention without requiring complex belt mechanisms, thereby simplifying the equipment while maintaining effectiveness.
Solution Approach 2:
The invention replaces expensive, complex continuous cooling belt equipment with a simple, inexpensive water bath system. The water-soluble polymer additive is consumed or can be easily replenished, making the overall system more cost-effective and easier to implement than permanent complex cooling infrastructure.
3Stability of the object's composition
If non-water liquid bath is used for cooling, then polymer dispersion is prevented, but environmental hazards and processing costs increase
Solution Approach 1:
The chemical composition of the cooling bath is modified by adding water-soluble polymer additives to water, changing its properties to prevent polymer dispersion. This allows the system to maintain water as the base fluid (environmentally friendly) while achieving the dispersion resistance normally provided by non-aqueous solvents.
Solution Approach 2:
The water-soluble polymer additive creates an inert-like environment within the water bath that is unfavorable for polymer dispersion. The additive forms a protective milieu around the cooling polymer, preventing direct interaction with water molecules that would cause dispersion, thus creating a safe and environmentally friendly cooling environment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively quenches and pelletizes water-dispersible polymers without degrading their properties, using an environmentally friendly and cost-effective approach, maintaining the material's solubility and preventing sticking, while allowing for further processing into filaments or powders for additive manufacturing.
Implementation Method 1
monovalent cations proximate a surface of the water-dispersible polymer are exchanged with multivalent cations to form a barrier that temporarily resists dispersion
Implementation Method 2
the material is also pelletized in the water-based bath, as the molten material needs to be processed into a smaller, more manageable form
Implementation Method 3
When cooling and pelletizing are be done at the same time, the reaction process can be quickly quenched
Data Source
AI summary
A method of processing a water-dispersible, polymer-based material in a bath of a water-based solution includes providing a molten water-dispersible polymer material having monovalent cations. The water-dispersible polymer is introduced into a water bath comprising multivalent salt dissociated in the water bath into multivalent cations and anions. The water-dispersible polymer is retained within the water bath with the dissociated multivalent cations to quench the water-dispersible, polymer-based material while the monovalent cations proximate a surface of the water-dispersible polymer are exchanged with multivalent cations to form a barrier that temporarily resists dispersion of the water-dispersible, polymer-based material within the water bath. The method includes removing the water-dispersible polymer from water bath after the exchange step.