F-POSS Synthetic Blend for Improved Solubility
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Solution Overview
Problem
Fluorinated polyhedral oligomeric silsesquioxane (F-POSS) molecules have low solubility in non-fluorinated solvents due to intermolecular attraction, making them difficult to disperse and dissociate in materials, which limits their applications.
Innovation Solution
A synthetic blend of F-POSS molecules is created by mixing feedstocks with different fluorinated triethoxysilane carbon chain lengths, resulting in a distribution of molecules with varying R substituent lengths, reducing intermolecular attraction and enhancing dispersibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If F-POSS molecules are used with uniform R substituents, then the material structure is simple and easy to manufacture, but the intermolecular attraction causes poor dispersibility and low solubility
Solution Approach 1:
The patent applies local quality by creating F-POSS molecules with non-uniform R substituents, where different apex positions have different substituent types (e.g., C4F9, C6F13, C8F17) or lengths. This local variation in substituent quality reduces intermolecular attraction and improves dispersibility while maintaining the overall cage structure integrity.
Solution Approach 2:
The patent creates composite F-POSS molecules by combining multiple types of fluorinated alkyl substituents (different carbon chain lengths and fluorine compositions) on a single cage structure. This composite approach allows the material to exhibit both the desired low surface energy properties and improved dispersibility in various matrices.
2Stability of the object's composition
If F-POSS molecules have strong intermolecular attraction, then the material maintains structural stability, but the molecules are difficult to disperse and dissociate in other materials
Solution Approach 1:
The patent changes the substituent parameters by introducing variation in R group types, carbon chain lengths, and fluorine content across different apex positions. This parameter diversification reduces the uniformity of intermolecular interactions, weakening the strong attraction that causes aggregation and improving dispersibility while preserving structural stability.
3Reliability
If F-POSS molecules have low surface energy for superhydrophobic properties, then the coating performance is enhanced, but the solubility in non-fluorinated solvents decreases
Solution Approach 1:
The patent applies local quality by positioning different fluorinated alkyl substituents (with varying carbon chain lengths and fluorine densities) at different apex positions. This creates local variations in surface energy distribution, maintaining the overall low surface energy needed for superhydrophobicity while improving compatibility with non-fluorinated solvents through diverse intermolecular interaction possibilities.
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
The synthetic blend improves the dispersibility and solubility of F-POSS molecules in materials, leading to improved coating properties and enhanced hydrophobicity, while maintaining desirable properties like reduced ice adhesion and stability.
Implementation Method 1
The fluorine atoms of neighboring F-POSS molecules have a tendency to attract each other resulting in F-POSS molecules not typically being readily dispersible or dissociable in other materials
Data Source
AI summary
The present disclosure relates, in exemplary embodiments, to compositions of matter comprising synthetic blends of at least two feedstocks that produce a distribution of fluorinated polyhedral oligomeric silsesquioxane molecule structures. The present disclosure also relates, in exemplary embodiments, to methods of making such synthetic blends.