Multilayer Spider Silk Protein Films via Formic Acid Evaporation
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Solution Overview
Problem
There is no general method available for forming multilayer films from spider silk proteins, as existing methods require specific conditions such as oppositely charged layers, which limits their application and stability.
Innovation Solution
A method involving the use of spider silk protein solutions in formic acid, where the acid is evaporated to form a film layer, and this process is repeated to create multiple layers, allowing for stable multilayer films without the need for surface modification, enabling the combination of different silk proteins and other materials for tailored properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If existing methods using oppositely charged layers are used to form multilayer films, then film stability is improved, but the method complexity and requirement for surface modification increase
Solution Approach 1:
The patent extracts and removes the requirement for surface modification and charged layers from the film formation process. By using formic acid as a solvent that evaporates completely, the method eliminates the need for complex surface treatments while maintaining film stability through the natural properties of silk proteins in formic acid solution.
Solution Approach 2:
The patent changes the chemical parameter of the solvent from water or buffered solutions to formic acid. This parameter change allows the silk proteins to self-assemble into stable multilayer films without requiring charged surfaces, as formic acid provides the right chemical environment for protein stabilization during film formation.
2Ease of manufacture
If a general method for forming multilayer films from silk proteins is developed, then versatility and ease of manufacture are improved, but the need for specific conditions (such as charged layers) is reduced
Solution Approach 1:
The patent creates a universal method that can produce multilayer films from any silk protein source (spider, insect, or recombinant) using a single approach with formic acid. This universal solvent system replaces multiple specialized methods, allowing the same basic procedure to be applied across different protein types while maintaining film quality and stability.
3Manufacturing precision
If multiple layers are formed by repeating the film formation process, then film thickness and composition control are improved, but the production time increases
Solution Approach 1:
The patent prepares silk protein solutions in formic acid with predetermined concentrations and compositions before the film formation process. This preliminary preparation allows for precise control of film thickness and properties from the outset, reducing the need for iterative adjustments and speeding up the overall production process while maintaining manufacturing precision.
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
This approach enables the production of stable and tailored multilayer spider silk protein films with controlled thickness and composition, allowing for various applications by combining different silk proteins and other materials, such as polystyrene or collagen, without the need for surface modification, enhancing their bio-functionality and structural properties.
Implementation Method 1
evaporating the formic acid, thereby forming a first spider silk protein film layer
Data Source
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AI summary
The present invention is directed to a method of forming multilayer silk protein films and a multilayer film obtained therefrom. The invention is further directed to various materials, products and compositions containing said multilayer film and to the use of Said multilayer film in several applications.