Fluorinated Polymer Water Oil Repellency Environmental Load
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Solution Overview
Problem
Current fluorinated polymers with perfluoroalkyl groups having at least 8 carbon atoms pose environmental concerns due to decomposition and low water/oil repellency when using monomers with fewer than 8 carbon atoms, which are insufficient for durable water/oil repellency.
Innovation Solution
A fluorinated compound with a perfluoroalkyl group of up to 6 carbon atoms, represented by the formula CH2=C(M)COO(CH2)nPhCOO(CH2)mCrF2r+1, is polymerized to create a polymer with high durability and low environmental impact, where n, m, and r are specific integers, and the polymer is used alone or in copolymer form with other monomers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If monomers with fewer than 8 carbon atoms in the perfluoroalkyl group are used, then the environmental load is reduced, but the water/oil repellency durability is insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of the fluorinated compound by introducing a specific molecular architecture with a perfluoroalkyl group of 1-6 carbon atoms combined with a phenylene group and ester linkages. This structural modification enables the compound to achieve durable water/oil repellency while maintaining lower environmental impact, resolving the contradiction between environmental load and performance durability.
2Reliability
If perfluoroalkyl groups with at least 8 carbon atoms are used, then the water/oil repellency is improved, but the environmental load increases
Solution Approach 1:
The patent modifies the carbon atom count parameter of the perfluoroalkyl group to fall within 1-6 atoms, which is significantly lower than the conventional 8+ carbon atoms. This parameter change, combined with specific structural features (phenylene group, ester linkages), maintains effective water/oil repellency while reducing environmental persistence and toxicity associated with longer-chain perfluoroalkyl substances.
3Reliability
If a polymer is composed solely of monomer having perfluoroalkyl group, then the water/oil repellency is improved, but the durability is insufficient
Solution Approach 1:
The patent creates a composite polymer structure by copolymerizing the fluorinated compound with other monomers. This composite approach combines the water/oil repellency properties of the perfluoroalkyl-containing monomer with the durability and adhesion properties of the copolymer matrix, achieving both effective repellency and long-term durability that neither component could achieve alone.
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 resulting polymer achieves highly durable water/oil repellency with minimal environmental load, maintaining performance over time and reducing the need for monomers with longer perfluoroalkyl groups that contribute to environmental issues.
Implementation Method 1
a fluorinated polymer and fluorinated copolymer obtainable by polymerizing it
Implementation Method 2
a surface orientation of Rf and formation of 'a low surface energy surface' having a low critical surface tension on the surface
Data Source
AI summary
To provide a fluorinated compound having an RF group with at most 6 carbon atoms, whereby a fluorinated polymer having a highly durable water/oil repellency can be produced, and an environmental load is little, and a fluorinated polymer and a fluorinated copolymer having a highly durable water/oil repellency and presenting little environmental load, obtainable by polymerizing such a fluorinated compound. A fluorinated compound represented by the following formula (I) and its polymer: CH2=C(M)COO(CH2)nPhCOO(CH2)mCrF2r+1 (I) (in the formula (I), M is a hydrogen atom, a methyl group or a halogen atom, n is an integer of from 0 to 2, Ph is a phenylene group, m is an integer of from 1 to 4, and r is an integer of from 1 to 6).