Aqueous Peptide Copolymer PISA for Solvent-Free Nanoparticle Formation
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Solution Overview
Problem
Existing methods for preparing amphiphilic polypeptide nanomaterials are cumbersome, require toxic organic solvents, and are sensitive to water and humidity, posing challenges for scalability and regulatory approval.
Innovation Solution
A 'one pot' method in an aqueous medium using polymerization-induced self-assembly (PISA) of hydrophilic polymers and hydrophobic N-carboxyanhydride monomers, eliminating the need for organic solvents and enabling spontaneous self-assembly of amphiphilic peptide copolymers into stable nanoparticles in a single step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ring opening polymerization of N-carboxyanhydride monomers is used, then controlled peptide-based polymers can be prepared, but the method requires toxic organic solvents and multiple purification steps
Solution Approach 1:
The patent changes the solvent parameter from toxic organic solvents (DMF) to aqueous environment, fundamentally altering the reaction conditions to eliminate harmful substances while maintaining polymerization control through pH and temperature parameters
Solution Approach 2:
The patent extracts and eliminates the need for toxic organic solvents and multiple purification steps by implementing a one-pot aqueous method where the polymerization and self-assembly occur simultaneously in a single reaction vessel
2Reliability
If conventional polymerization methods are used, then peptide-based polymers can be synthesized, but the process is sensitive to water and humidity
Solution Approach 1:
The patent changes the reaction environment from water-sensitive conditions to controlled aqueous conditions with specific pH ranges (7-10), transforming the sensitivity issue into a controllable parameter that enhances reproducibility
3Productivity
If nanoprecipitation step is added for nanoparticle preparation, then functional nanoparticles can be obtained, but the process complexity and number of steps increase
Solution Approach 1:
The patent merges polymerization and nanoparticle self-assembly into a single simultaneous process, eliminating the separate nanoprecipitation step and achieving both polymer synthesis and nanoparticle formation in one reaction vessel
Solution Approach 2:
The patent employs polymerization-induced self-assembly where the growing polymer chains automatically organize into nanoparticle structures during synthesis, eliminating the need for separate formulation steps and reducing process complexity
4Productivity
If radical polymerization processes are used for PISA, then amphiphilic polymers can be obtained, but the method requires dispersion or emulsion conditions that complicate the process
Solution Approach 1:
The patent changes the polymerization mechanism from radical-based to anionic polymerization of NCA monomers in aqueous conditions, fundamentally altering the reaction chemistry to enable simple one-pot synthesis without complex dispersion or emulsion systems
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 allows for the rapid, efficient, and biocompatible production of functional nanoparticles with high dry extract rates, reducing complexity and enhancing scalability while maintaining regulatory compliance.
Implementation Method 1
preparation of amphiphilic polypeptides in aqueous solutions via ring opening polymerization
Implementation Method 2
spontaneous self-assembly of amphiphilic peptide copolymers into stable nanoparticles
Data Source
AI summary
The present invention relates to a “one-pot” method for preparing an aqueous solution of nanoparticles with amphiphilic block copolymers and comprising polypeptide units, the method comprising at least one step (E1), in an aqueous solvent, consisting of bringing together: —at least one hydrophilic polymer (P1) comprising at least one amine function, and —at least one hydrophobic α-amino acid N-carboxyanhydride monomer.