Cellulose Nanostructure Razor Blades for Sustainable Cutting
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Solution Overview
Problem
Current methods for manufacturing razor blades from metallic materials are costly and environmentally unsustainable, and existing polymer-based blades lack the necessary mechanical properties and sustainability attributes, such as biodegradability and sharpness, to effectively cut hair.
Innovation Solution
A method involving the use of naturally derived materials like cellulose nanostructures, combined with organic solvents and polymeric materials, is employed to create cutting-edge structures through a process of gel curing and molding, allowing for the formation of sharp, biodegradable razor blades with customizable shapes and high mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic materials are used for razor blades, then mechanical strength and sharpness are achieved, but environmental sustainability and cost are worsened
Solution Approach 1:
The patent changes the material parameter from traditional metal to polymer composite, specifically using naturally derived biodegradable materials. This parameter change resolves the contradiction by providing an environmentally sustainable alternative that maintains cutting functionality through proper material selection and processing.
Solution Approach 2:
The patent employs composite materials consisting of polymer matrices reinforced with natural fiber fillers. This composite approach allows the material to achieve necessary mechanical strength for cutting applications while being composed of biodegradable, environmentally sustainable components, thus resolving the contradiction between strength and environmental impact.
2Ease of manufacture
If conventional polymeric materials are used for blades, then cost is reduced, but mechanical properties and sharpness are worsened
Solution Approach 1:
The patent uses composite materials with polymer matrices and natural fiber reinforcements. This composite structure enhances the mechanical properties of the base polymer material, providing sufficient strength and sharpness for cutting applications while maintaining the cost advantages of using polymeric materials instead of metals.
Solution Approach 2:
The patent modifies the material parameters by selecting specific polymer types and filler combinations that optimize both mechanical performance and manufacturing cost. Through parameter optimization in material composition and processing conditions, the patent achieves a balance between affordability and cutting effectiveness.
3Ease of manufacture
If conventional polymeric materials are used for blades, then cost is reduced, but biodegradability and sustainability are worsened
Solution Approach 1:
The patent changes the material composition parameters by selecting naturally derived polymers and biodegradable fillers. This parameter change transforms the material from conventional non-biodegradable plastics to environmentally friendly alternatives that maintain manufacturing cost efficiency while achieving biodegradability and sustainability goals.
4Strength
If high temperature heat treatment is applied to metal blades, then mechanical properties are improved, but energy consumption and environmental impact are worsened
Solution Approach 1:
The patent changes the material system from metal requiring high-temperature heat treatment to polymer composites that achieve desired mechanical properties through lower-energy processing methods. This parameter change eliminates the need for energy-intensive furnaces while maintaining or improving mechanical performance through composite material design.
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 method produces razor blades with a tip radius of less than 1 μm, providing a sharp and sustainable cutting edge, while being environmentally friendly and cost-effective, enabling the use of renewable and biodegradable materials for razor blades.
Implementation Method 1
curing the one or more physical gels to form one or more chemical gels
Implementation Method 2
curing the one or more chemical gels one or more times, forming a dried chemical gel
Data Source
AI summary
A novel cutting-edge structure and method and apparatus for manufacturing the cutting-edge structure is provided. The cutting-edge structure is comprised of naturally derived or renewable material at greater than 50% by volume fraction. In one embodiment, the naturally derived material is a cellulose nanostructure such as a cellulose nanocrystal. The cellulose nanocrystal is processed using a base or mold structure to provide a cutting edge of any shape such as linear or circular edge structures. The process includes dual cure steps to produce an optimal cutting-edge structure without shrinkage. The formed cutting-edge structure can be utilized as a razor blade as it is formed with very sharp tip and edge suitable for cutting hair. The base structure can form one or more cutting-edge structures simultaneously.