Water-Miscible Functional Fluid Photosterilization Against Putrefaction
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Solution Overview
Problem
Existing metalworking fluids face issues with putrefaction, which leads to decreased performance, odor, and potential health hazards due to the use of preservatives and antibacterial amines, while sterilization methods like UV, ozone, and electromagnetic radiation pose environmental and equipment challenges.
Innovation Solution
A water-miscible functional fluid containing a neutral photosensitizer with an isoalloxazine skeleton and an antioxidant, such as riboflavin, is used for photosterilization, which generates singlet oxygen to kill microorganisms without pH drop and skin irritation, combined with a sterilizer system for circulation and use in metalworking machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preservatives and antifungal agents are added to metalworking fluid, then antiputrefactive properties are improved, but skin irritation and harmful effects on human body worsen
Solution Approach 1:
The patent removes harmful preservatives and antifungal agents from the metalworking fluid system entirely. Instead of using chemical additives, the invention employs physical sterilization methods (UV irradiation, ozone generation, electromagnetic radiation) to achieve antiputrefactive properties without introducing substances that cause skin irritation or other harmful effects on human health.
Solution Approach 2:
The patent replaces chemical preservation methods with physical sterilization mechanisms. UV irradiation units, ozone generators, or electromagnetic radiation sources are installed in the fluid circulation system to continuously sterilize the metalworking fluid, substituting the need for chemical preservatives with a mechanical/physical sterilization system that eliminates harmful chemical exposure.
2Reliability
If antibacterial amines are added to metalworking fluid, then antiputrefactive properties are improved, but biotoxicity and environmental impact worsen
Solution Approach 1:
The patent extracts and eliminates antibacterial amines from the metalworking fluid composition. The invention achieves putrefaction prevention through physical sterilization methods (UV light, ozone, or electromagnetic radiation) that destroy microorganisms without requiring any chemical additives, thereby completely removing biotoxicity and environmental concerns associated with antibacterial amines.
Solution Approach 2:
The patent substitutes chemical antibacterial action with physical sterilization mechanisms. UV irradiation lamps, ozone generation devices, or electromagnetic radiation sources are integrated into the fluid circulation system to continuously sterilize the metalworking fluid, replacing the need for antibacterial amine chemicals with a clean physical sterilization approach.
3Reliability
If high pH is maintained in metalworking fluid, then antiputrefactive properties are improved, but metal corrosion worsens
Solution Approach 1:
The patent changes the approach to maintaining antiputrefactive properties by not relying on high pH conditions. Instead of adjusting and maintaining high pH levels (which causes corrosion), the invention uses physical sterilization methods (UV irradiation, ozone generation, or electromagnetic radiation) that are pH-independent, allowing the metalworking fluid to operate at optimal pH levels without compromising antiputrefactive performance while preventing metal corrosion.
4Reliability
If traditional sterilization methods (UV, ozone, electromagnetic radiation) are used, then putrefaction is prevented, but equipment complexity and cost worsen
Solution Approach 1:
The patent integrates sterilization functionality into the existing metalworking fluid circulation system. The UV irradiation unit, ozone generator, or electromagnetic radiation source is incorporated as part of the already-present fluid circulation apparatus, allowing the system to perform both its primary metalworking function and sterilization function without requiring completely separate equipment, thereby reducing overall system complexity.
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 provides long-lasting antibacterial and antiputrefactive properties with reduced odor and skin irritation, maintaining fluid stability and preventing equipment corrosion, while avoiding the costs and hazards of traditional sterilization methods.
Implementation Method 1
irradiating the water-miscible functional fluid with visible light having a wavelength in a range of 380 nm to 500 nm
Implementation Method 2
A water-miscible functional fluid containing a neutral photosensitizer with an isoalloxazine skeleton and an antioxidant, such as riboflavin, is used for photosterilization, which generates singlet oxygen to kill microorganisms
Data Source
AI summary
A water-miscible functional fluid includes: a neutral photosensitizer having an isoalloxazine skeleton; and an antioxidant, wherein the antioxidant is a radical scavenger or a peroxide decomposer.