Antibacterial Polymer Coating Composition with Silane Coupling Agent
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Solution Overview
Problem
Existing antibacterial polymer coatings face challenges with low dispersibility of photosensitizers in silicone resins, limited application flexibility, and short-lived active oxygen generation when using visible light, making them unsuitable for mass production and effective antibacterial activity.
Innovation Solution
A photocurable antibacterial coating composition combining a (meth)acrylate-based monomer or oligomer with an alkylene oxide and a compound represented by Chemical Formula 1, along with a photoinitiator, which enhances dispersibility, stability, and prolonged active oxygen generation when exposed to visible light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a photosensitizer is mixed with melted silicone resin, then the resin can be processed, but the photosensitizer has low dispersibility and aggregates instead of being homogeneously distributed
Solution Approach 1:
The patent uses a silane coupling agent as an intermediary substance to facilitate homogeneous distribution of the photosensitizer in the silicone resin. The silane coupling agent acts as a mediator that improves compatibility between the photosensitizer and resin matrix, preventing aggregation while maintaining processability.
Solution Approach 2:
The patent creates a composite material system consisting of silicone resin, photosensitizer, and silane coupling agent. This composite approach allows the combination of materials with different properties to achieve both homogeneous distribution and desired mechanical properties, resolving the contradiction between processability and homogeneity.
2Adaptability or versatility
If a coating solution is used to dissolve silicone resin and photosensitizer, then application flexibility is improved, but active oxygen generation is insufficient when using visible light
Solution Approach 1:
The patent changes the chemical parameters of the resin system by introducing a specific silane coupling agent that enhances visible light absorption and active oxygen generation efficiency. This parameter change allows the coating to maintain application flexibility while achieving sufficient antibacterial activity under visible light irradiation.
3Ease of operation
If visible light is used for photodynamic therapy, then the treatment can be applied non-invasively, but active oxygen is present only for a very short period of time
Solution Approach 1:
The patent implements continuous generation of active oxygen through the photodynamic system, where the silane coupling agent-enhanced photosensitizer continuously produces active oxygen under visible light irradiation. This continuous generation compensates for the short lifetime of individual active oxygen molecules, maintaining effective antibacterial activity over extended periods.
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 solution achieves high antibacterial activity with prolonged active oxygen generation and improved mass production feasibility, suitable for various applications by increasing oxygen permeability and diffusivity, thereby enhancing the antibacterial properties of polymer films and molded products.
Implementation Method 1
a photoinitiator
Implementation Method 2
a photosensitizer absorbs light to produce reactive oxygen species (ROS), and photodynamic therapy (PDT), in which the photosensitizer is excited upon irradiation with light of a specific wavelength from the outside to generate active oxygen species or free radicals
Data Source
AI summary
The present disclosure relates to an antibacterial coating composition including a (meth)acrylate-based monomer or oligomer containing an alkylene oxide having 1 to 10 carbon atoms; a compound represented by the following Chemical Formula 1; and a photoinitiator, an antibacterial polymer film including a cured product of the antibacterial polymer coating composition, and an antibacterial polymer film including a polymer resin containing a (meth)acrylate-based repeating unit having an introduced alkylene oxide functional group having 1 to 10 carbon atoms; and a compound represented by the following Chemical Formula 1 dispersed in the polymer resin, wherein antibacterial activity measured according to JIS R 1702 (KS L ISO 27447; 2011) is 99% or more:in Chemical Formula 1,at least one of R isand the rest are hydrogen,R1 is hydrogen, C1 to C5 alkyl, or C1 to C5 alkoxy,k is an integer of 1 to 5, andn is an integer of 1 to 20.