Phospholipid F-S-L Constructs for Inert Surface Functionalization
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Solution Overview
Problem
Existing methods for functionalizing inert surfaces, such as those of porous membranes and microspheres, are limited in their ability to effectively localize functional moieties without compromising the antifouling properties or structural integrity, especially when using materials like glass or polystyrene.
Innovation Solution
A method involving the use of an aqueous dispersion of a construct with the structure F-S-L, where F is a functional moiety, S is a spacer providing water dispersibility, and L is a diacyl- or dialkyl-glycerophospholipid, is applied to inert surfaces like glass, silver, and certain polymers, allowing for the localization of functional moieties through immersion or flooding, followed by washing to create a stable, biocompatible functionalized surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used to functionalize inert surfaces, then functional moieties can be localized to the surface, but the antifouling properties or structural integrity are compromised
Solution Approach 1:
The patent introduces a phospholipid-based construct as an intermediary between the inert substrate surface and the functional moiety. This construct contains a hydrophobic region that interacts with the inert surface and a hydrophilic region that presents the functional group, thereby mediating the functionalization without compromising the substrate's antifouling properties or structural integrity.
Solution Approach 2:
The patent applies local quality by creating a specific interface at the substrate surface where the phospholipid construct localizes functional moieties only at the surface level, while the bulk substrate material retains its original inert and antifouling characteristics. This localized functionalization avoids altering the overall properties of the substrate.
2Object-affected harmful factors
If inert surfaces are used for substrates, then antifouling properties are maintained, but the ability to functionalise the surface is limited
Solution Approach 1:
The phospholipid construct serves as a bridge that enables functionalization of inert surfaces without altering their antifouling properties. The hydrophobic portion of the construct interacts with the inert surface while the hydrophilic portion provides functional groups for biological applications, thus maintaining both antifouling capability and functionalisation versatility.
Solution Approach 2:
The patent creates a universal approach by using a phospholipid-based construct that can be applied to various inert surfaces (glass, metal, polymer) and provides multiple functional possibilities through different functional moieties (F), making the system adaptable to different biological applications while preserving the inert surface properties.
3Reliability
If functional moieties are attached to inert surfaces, then biological functionality is achieved, but the association is weak and unstable during washing
Solution Approach 1:
The phospholipid construct acts as a stable intermediary that anchors functional moieties to inert surfaces through its hydrophobic region interacting with the substrate while maintaining the functional groups in a stable, accessible configuration. This intermediary structure ensures strong and stable association that withstands repeated washing steps.
Solution Approach 2:
The patent employs a composite structure combining the inert substrate material with the phospholipid construct and functional moiety. This composite approach creates a stable association where the phospholipid layer acts as a durable interface between the inert surface and the functional groups, maintaining stability during washing while preserving biological functionality.
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 enables strong and stable association of functional moieties with the surface, maintaining functionality during repeated washing steps and applicable to a broad range of inert surfaces, including hydrophobic and hydrophilic materials, enhancing biological applications like sample analysis and preparation without affecting the antifouling properties.
Implementation Method 1
L is a diacyl- or dialkyl-glycerophospholipid... contacting the surface of the substrate with an aqueous dispersion of a construct of the structure F-S-L
Implementation Method 2
S is a spacer selected to provide a construct that is dispersible in water
Data Source
AI summary
Biocompatible methods of functionalizing inert surfaces for use in biological applications are described. The methods employ the use of synthetic constructs of the generic structure F-S-L (where F is a functional moiety, S is a spacer selected to provide a construct that is dispersible in water, and L is a diacyl- or dialkyl-glycerophospholipid). An object of the invention is to localize or immobilize functional moieties to the inert surface of a substrate wherein the surface is comprised of glass, silver, polyamide, polycarbonate, polypropylene, polyethersulfone, polytetrafluoroethylene or polyvinylidene fluoride, and the substrate is comprised of a fiber, membrane, microsphere or nanosphere.