Polyhydrosiloxane Surface Grafting for Neutral Biomaterials
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Solution Overview
Problem
Existing materials for biomedical applications, such as sensors and biomaterials, often exhibit insufficient neutral behavior, leading to non-specific adsorption and segregation issues, which affect their homogeneity and functionality, particularly in terms of anti-bacterial and anti-fungal properties, cost, ease of production, and sensitivity.
Innovation Solution
A material comprising a support with a polyhydrosiloxane layer covalently bonded to a grafted chain through Si-C bonds, where the chain is bonded through non-terminal carbon atoms and includes hydrophilic parts, allowing for easy functionalization and improved neutrality, is developed. This material is prepared by treating the support to create a SiH layer, grafting an alkene with a catalyst, and forming a stable, hydrophilic surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If copolymerisation of PC methacrylate is used to create neutral surfaces, then neutral behavior is improved, but material homogeneity deteriorates due to segregation
Solution Approach 1:
The invention uses a composite material system combining polyhydrosiloxane (PMHS) matrix with grafted phospholipid chains. This composite structure integrates the hydrophilic properties of phospholipids with the structural stability of polyhydrosiloxane, achieving both neutral behavior and compositional homogeneity without segregation issues
2Reliability
If complex copolymerisation methods are used to treat surfaces, then neutral behavior is improved, but device complexity increases
Solution Approach 1:
The invention performs preliminary action by pre-synthesizing phospholipid-containing alkene compounds that already possess the desired neutral properties. These pre-functionalized molecules are then directly grafted onto the polyhydrosiloxane surface, eliminating the need for complex multi-step copolymerisation processes and reducing overall process complexity
3Reliability
If multiple synthesis steps are used for each desired composition, then material properties are improved, but ease of manufacture deteriorates
Solution Approach 1:
The invention creates a universal synthesis platform where a single polyhydrosiloxane base material can be functionalized with various phospholipid-containing alkenes to achieve different desired compositions and properties. This multi-functional approach allows one synthesis pathway to produce multiple material variants, greatly simplifying manufacturing compared to developing separate syntheses for each composition
4Ease of manufacture
If existing polymer materials are used, then availability is improved, but passivation properties deteriorate due to insufficient neutrality
Solution Approach 1:
The invention applies local quality by modifying only the surface region of the polyhydrosiloxane material through grafting phospholipid chains. The bulk material maintains its structural integrity and availability, while the surface acquires enhanced neutral and passivation properties. This localized modification preserves the advantages of existing polymers while adding the required functional properties
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 resulting material demonstrates excellent passivation properties with low non-specific adsorption, high neutrality, and ease of functionalization, enhancing its suitability for biomedical applications by reducing the need for additional passivation steps and improving sensitivity and cost-effectiveness.
Implementation Method 1
the covalent bonding between the support and/or the polyhydrosiloxane and the chain is an Si-C bond
Implementation Method 2
They can retain numerous molecules of water
Data Source
Figure 1A~1B
Figure 2~3
Figure 4~5
AI summary
The instant invention concerns - a method for preparing a material comprising the following steps of a) treating the support to obtain a layer having SiH function, b) grafting the SiH layer obtained in step a) with an alkene and a catalyst for covalently bonding the alkene to the coating, said alkene being non-terminal and/or having an hydrophilic part, and c) recovering a material comprising a support coated with a chain covalently grafted with Si-C bonds, - a material comprising a support, optionally comprising a polyhydrosiloxane layer, on which surface is covalently bonded a grafted chain, wherein the covalent bonding between the support and/or the polyhydrosiloxane and the chain is an Si-C bond, and the grafted chain is bonded through a non-terminal carbon, through more than one covalent bond and/or the chain is having at least one hydrophilic part, and - devices comprising such material.