Protein Ionic Liquid Thermoplastic Blending
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Solution Overview
Problem
Thermoplastics are incompatible with biological materials due to differences in processing conditions and properties, limiting the incorporation of biomolecules and resulting in low surface densities and inefficient surface-functionalization techniques.
Innovation Solution
The use of protein ionic liquids, which are soluble in polymer melts and resistant to high temperatures, allows for the uniform incorporation of functional proteins into thermoplastics and other materials, enabling the creation of biologically active composites through high-temperature processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surface-functionalization techniques are used to add biomolecules to plastics, then biocompatibility is improved, but surface density of biomolecules remains low and the process is inefficient
Solution Approach 1:
The invention changes the processing parameters by using high-temperature melting and blending conditions that enable deep incorporation of proteins throughout the bulk material, transforming the approach from surface-level functionalization to bulk integration, thereby achieving both high biocompatibility and high effective concentration of biomolecules
Solution Approach 2:
The invention transitions from two-dimensional surface functionalization to three-dimensional bulk incorporation of proteins within the plastic matrix, allowing biomolecules to be distributed throughout the entire material volume rather than confined to the surface, thus dramatically increasing the effective quantity and density of functional biomolecules
2Ease of manufacture
If high temperatures are used for thermoplastic processing, then processability is improved, but biological materials become inactive due to denaturation
Solution Approach 1:
The invention applies preliminary action by incorporating the proteins into the molten plastic matrix before the material cools and solidifies. The proteins are mixed into the melt at high temperature when the plastic is processable, then the blend is cooled rapidly to trap the proteins in their incorporated state, preserving their biological activity despite the high-temperature processing environment
Solution Approach 2:
The invention exploits phase transitions by utilizing the melting phase of the thermoplastic to enable protein incorporation, then using rapid cooling to transition back to solid phase, thereby preserving the proteins. The process leverages the phase change from solid to melt for processing, then back to solid for product formation, with the protein stability maintained through controlled timing of the phase transition
3Reliability
If proteins are incorporated into thermoplastics, then biodegradability and biocompatibility are improved, but processing difficulty increases due to incompatibility of processing conditions
Solution Approach 1:
The invention changes the processing parameters by using high-temperature melting and blending conditions that enable deep incorporation of proteins throughout the bulk material, transforming the approach from surface-level functionalization to bulk integration, thereby achieving both high biocompatibility and high effective concentration of biomolecules
Solution Approach 2:
The invention uses the molten thermoplastic matrix itself as an intermediary medium that facilitates uniform distribution of proteins throughout the material. The melt state acts as a carrier that enables thorough mixing and homogeneous dispersion of protein particles or solutions, ensuring consistent biodegradability and biocompatibility throughout the final product
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 method results in bioplastics with enhanced biodegradability, biocompatibility, and bioactivity, reducing plastic waste and enabling the creation of functional materials with embedded proteins that retain their biological activity across various forms and applications.
Implementation Method 1
For processing, a piece of solid thermoplastic was melted in the presence of protein ionic liquid on a hot plate at 95° C. until flowing, blended together to reach homogeneity
Implementation Method 2
blended together to reach homogeneity
Implementation Method 3
solidified into a new bioplastic material by cooling to room temperature
Data Source
AI summary
A method for modifying the properties of balsa wood comprises infiltrating a protein ionic liquid comprising polymerized dopamine into delignified balsa wood. A method of making an optically active protective coating comprises mixing protein ionic liquid comprising polymerized dopamine with ethyl acetate-based or water-based nail polish. A method of making a thermoplastic having biological activity comprises melting a thermoplastic; and blending a protein ionic liquid with the thermoplastic; and cooling the thermoplastic protein ionic liquid blend to a solid state. The thermoplastic is a hot glue stick. The protein ionic liquid comprises antibodies, enzymes, or fluorescent proteins. A method of making a chymotrypsin protein ionic liquid/thermoplastic material comprises mixing cationized chymotrypsin and anions of poly(ethylene glycol) 4-nonylphenyl 3-sulfopropyl ether to form a chymotrypsin and anion complex; lyophilizing and melting the cationized chymotrypsin and anion complex to form a water-free ionic liquid; blending the chymotrypsin ionic liquid with molten hot glue/thermoplastic.