Lipid Peptide Hydrogelator Self-Assembly for Stable Gelation
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Solution Overview
Problem
Existing hydrogels face challenges in forming stable gels over a wide pH range, particularly in neutral conditions, and have issues with biocompatibility, safety, and environmental impact due to the use of crosslinkers and toxic reagents, as well as limitations in mass production and temperature-dependent gel formation.
Innovation Solution
A lipid peptide hydrogelator represented by Formula (1) that self-assembles to form a hydrogel without the need for crosslinkers, capable of forming a stable gel structure from acidic to alkaline pH ranges using an aqueous or alcohol solution, with a small adding amount, and is composed of a lipid moiety and a peptide moiety, allowing for biodegradability and high biocompatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If crosslinkers and toxic reagents are used to form hydrogels, then gel formation capability is improved, but biocompatibility and safety deteriorate
Solution Approach 1:
The patent removes crosslinkers and toxic reagents from the hydrogel formulation entirely. The hydrogelator molecules self-assemble through non-covalent interactions (hydrogen bonding, hydrophobic effects) to form gels without requiring external crosslinking agents, thereby eliminating the harmful factors associated with traditional crosslinking methods.
Solution Approach 2:
The hydrogelator molecules possess intrinsic self-assembly capability through their molecular design. The amphipathic structure with hydrophobic alkyl chains and hydrophilic peptide moieties enables spontaneous gel formation in aqueous solutions without external assistance, making the system self-sufficient and eliminating the need for toxic crosslinkers.
2Adaptability or versatility
If copolymerization reaction is used to introduce functional molecules, then functional capabilities are improved, but manufacturing complexity and safety issues worsen
Solution Approach 1:
The patent divides the functional molecule into separate components: the hydrogelator backbone provides gel formation capability, while functional groups are attached as discrete side chains or modifications. This segmentation allows independent optimization of gelation properties and functional capabilities without complex copolymerization reactions.
Solution Approach 2:
The patent creates composite functional hydrogels by combining the lipid peptide hydrogelator with functional molecules through non-covalent interactions or simple conjugation. This approach achieves functional versatility while maintaining manufacturing simplicity, as the components can be mixed or assembled under mild conditions without complex polymerization processes.
3Object-affected harmful factors
If natural polymer gels are used, then biocompatibility is improved, but gel stability and functional customization worsen
Solution Approach 1:
The patent creates a composite material that combines the biocompatibility of natural polymers with the structural stability of synthetic systems. The lipid peptide hydrogelator mimics natural amphipathic structures (similar to cell membrane components) while providing controlled self-assembly and stable gel formation through well-defined non-covalent interactions.
Solution Approach 2:
The patent achieves gel stability through precise control of molecular parameters including alkyl chain length, peptide sequence, and functional group positioning. These parameter optimizations enable the hydrogel to maintain stable composition and structure while remaining biocompatible, overcoming the limitations of natural polymers.
4Ease of manufacture
If low molecular weight compounds are used for self-assembly, then gel formation ease is improved, but control over intermolecular interactions worsens
Solution Approach 1:
The patent designs a composite molecular structure combining hydrophobic alkyl chains for spontaneous aggregation with hydrophilic peptide moieties for controlled interactions. This composite structure enables both easy gel formation through self-assembly and precise control over intermolecular interactions through rational molecular design.
Solution Approach 2:
The patent applies local quality by assigning different functional characteristics to different parts of the hydrogelator molecule. The hydrophobic alkyl chains drive self-assembly and gel formation ease, while the hydrophilic peptide regions provide controlled intermolecular interactions through hydrogen bonding and other specific interactions, achieving both goals simultaneously.
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 hydrogelator forms a stable hydrogel with a small amount, maintaining structure across a wide pH range, ensuring high safety and biocompatibility, and can be used in various applications including cosmetics, medical materials, and cell culture, while being easily degradable, thus reducing environmental impact.
Implementation Method 1
a fiber formed by the self-assembly of the hydrogelator
Implementation Method 2
molecules associate spontaneously by an intermolecular non-covalent interaction or the like under an appropriate external condition to grow to a macro functional assembly
Implementation Method 3
the study of a self-assembly utilizing a hydrogen bond in an organic solvent is preceded and a self-assembled compound (that is, such as a hydrogelator) in an aqueous solution remains within a region of accidental findings
Data Source
AI summary
A hydrogel that includes an aqueous solution or an alcohol aqueous solution, and a hydrogelator containing a lipid peptide represented by Formula (1), or a pharmaceutically usable salt thereof. In Formula (1), R1 represents an aliphatic group having 9 to 21 carbon atoms; R2, R3, and R4 independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms that optionally has a branched chain having 1 or 2 carbon atoms, a phenylmethyl group, or a —(CH2)n—X group, and at least one of R2, R3, and R4 represents a —(CH2)n—X group; n represents an integer from 1 to 4; and X represents an amino group, a guanidino group, a —CONH2 group, or a 5-membered ring, a 6-membered ring or a fused heterocyclic ring composed of a 5-membered ring and a 6-membered ring that optionally has 1 to 3 nitrogen atoms.