Hydrophilic Polymer Substrate With Controlled Surface Irregularities
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Solution Overview
Problem
Existing hydrophilic substrates face challenges in forming smooth surfaces with controlled irregularities, which are essential for effectively capturing specific cells like cancer cells, due to difficulties with certain polymers that result in irregular surfaces.
Innovation Solution
A hydrophilic substrate is produced by forming a hydrophilic polymer layer on a substrate surface that has undergone a hydrophilization treatment, using a hydrophilic polymer represented by a specific formula, with controlled surface irregularities achieved through treatments like alkali solution, ultraviolet ray, electron beam, or plasma treatments, resulting in a smooth and high-capturing ability surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a special polymer is used to coat the substrate surface, then the substrate can capture specific cells, but the surface becomes irregular and smoothness is lost
Solution Approach 1:
The patent changes the chemical composition parameters of the polymer coating by specifying a copolymer with particular hydrophilic monomers (acrylamide, methacrylamide, or their derivatives) combined with specific other monomers. This parameter change in polymer chemistry enables the formation of a smooth surface while maintaining cell capture functionality through controlled surface irregularities.
Solution Approach 2:
The patent employs a composite polymer material consisting of two types of monomers: hydrophilic monomers (acrylamide, methacrylamide, or their derivatives) and other monomers (carboxylic acid, sulfonic acid, or their derivatives). This composite material structure allows the coating to achieve both smoothness and cell capture ability simultaneously.
2Ease of manufacture
If the substrate surface is roughened by etching or leaching, then hydrophilic polymer coating can be applied, but the surface irregularities reduce cell capture ability
Solution Approach 1:
The patent specifies precise parameter ranges for the polymer coating thickness (10-1000 nm) and molecular weight (10^4-10^6), which controls the degree of surface irregularities. By optimizing these parameters, the coating maintains smoothness while preserving cell capture functionality, resolving the contradiction between coating applicability and cell capture ability.
3Area of stationary object
If a thick polymer layer is formed to ensure coverage, then surface coverage is improved, but surface smoothness and controlled irregularities are lost
Solution Approach 1:
The patent defines a specific thickness range (10-1000 nm) for the polymer coating layer. This parameter optimization ensures sufficient surface coverage while maintaining controlled surface irregularities and smoothness. The thin film formation prevents excessive irregularities that would occur with thicker layers.
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 method enables the formation of a hydrophilic substrate with controlled surface irregularities and high smoothness, enhancing the ability to capture specific cells, such as cancer cells, and allowing for accurate cell counting and therapeutic efficacy assessment.
Implementation Method 1
a substrate surface to a hydrophilization treatment; and forming a hydrophilic polymer layer on the hydrophilization-treated surface
Implementation Method 2
a hydrophilic polymer layer is formed on a substrate surface having undergone a hydrophilization treatment... excellent ability to capture specific cells
Data Source
Figure 1
AI summary
Provided are: a hydrophilic substrate in which a hydrophilic polymer layer having controlled surface irregularities is formed; and a method for producing the hydrophilic substrate. The hydrophilic substrate is a hydrophilic substrate in which a hydrophilic polymer layer is formed on a substrate surface having undergone a hydrophilization treatment.