Copolymer Coating Film for Inhibiting Biological Material Adhesion
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Solution Overview
Problem
Existing coating materials for medical instruments and devices fail to effectively inhibit the adhesion of biological substances such as proteins and cells, particularly in aqueous environments, and do not promote optimal cell culture conditions.
Innovation Solution
A copolymer with specific anionic and cationic groups and a crosslinked structure is used, formulated in a predetermined amount, to form a coating film that inhibits biological substance adhesion and promotes cell culture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coating materials are used, then the coating can be applied to medical instruments, but the ability to inhibit adhesion of biological substances is insufficient
Solution Approach 1:
The patent uses a copolymer composed of multiple monomer units with different functions: hydrophilic monomers (for adhesion inhibition), anionic monomers (for coating stability), and cationic monomers (for surface interaction). This composite polymer structure combines multiple properties in a single material to achieve effective biological adhesion inhibition while maintaining coating integrity on medical instruments.
Solution Approach 2:
The patent optimizes specific parameters including the content of hydrophilic groups (30-80 mol%), the ratio of anionic to cationic groups (1:4 to 4:1), and the degree of crosslinking (5-50 mol%). By precisely controlling these compositional parameters, the coating achieves maximum adhesion inhibition performance while balancing the complexity of the polymer formulation.
2Reliability
If coating materials are used in aqueous environments, then they can be applied to medical devices, but adhesion inhibition performance deteriorates
Solution Approach 1:
The patent incorporates hydrophilic monomer units with specific hydrophilic groups (such as carboxyl, hydroxyl, or ether groups) in controlled amounts (30-80 mol% of total monomers). These hydrophilic groups form hydrated layers on the coating surface that repel biological substances in aqueous environments, maintaining adhesion inhibition performance while the crosslinked structure provides water resistance to preserve coating stability.
Solution Approach 2:
The copolymer combines hydrophilic monomers (for aqueous environment performance), anionic monomers (for coating film stability), and cationic monomers (for surface adhesion) in specific ratios. This composite structure enables the coating to simultaneously achieve adhesion inhibition in water and maintain compositional stability, resolving the contradiction between environmental performance and material stability.
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 coating film exhibits enhanced ability to inhibit adhesion of biological substances like proteins and cells, particularly platelets, and supports effective cell culture by reducing adhesion and promoting spheroid formation.
Implementation Method 1
a copolymer having a specific anionic group and cationic group
Implementation Method 2
the coating film has excellent resistance to an aqueous solvent and exhibits excellent ability to inhibit adhesion of biological substances
Implementation Method 3
when a copolymer having a specific anionic group and cationic group contains a crosslinked structure in a predetermined amount, the copolymer exhibits excellent ability to inhibit adhesion of biological substances
Data Source
AI summary
Provided are a composition for forming a coating film, a coating film and a substrate having the coating film, which have excellent compatibility with biological substances, as well as a method for producing the same. A composition for forming a coating film having the ability to inhibit adhesion of biological substances, the composition comprising a copolymer and a solvent, wherein the copolymer is obtained by subjecting a monomer mixture to polymerization, wherein the monomer mixture comprises compounds represented by the following formulae (1), (2), and (3):wherein R1 to R6, n, and m are as defined in the Description and Claims,wherein the compound represented by the formula (3) above is contained in a predetermined amount in the monomer mixture, a coating film obtained from the composition, and a substrate having the coating film as well as a method for producing the same.