Surface-Modified Elastic Body for Sliding and Leakage Resistance
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Solution Overview
Problem
Existing surface modification methods for elastic bodies, such as gaskets, face challenges in balancing sliding properties and liquid leakage resistance, particularly in applications where bio-preparations are involved, and current self-lubricating solutions like PTFE films are expensive and not durable, with limitations in radiation sterilization and repeated sliding applications.
Innovation Solution
A surface modification method involving the radical polymerization of non-functional monomers and silane compounds on rubber vulcanizates or thermoplastic elastomers, followed by the growth of perfluoroether group-containing functional polymer chains, using LED light for polymerization initiation and reaction, to create a cost-effective solution with improved sliding properties and liquid leakage resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If silicone oil is applied to improve sliding properties, then sliding properties are improved, but bio-safety is compromised due to potential adverse effects on bio-preparations
Solution Approach 1:
The patent applies a surface coating that can be sterilized by radiation and withstands repeated sliding, replacing the need for expensive, non-bio-safe silicone oil. The coating uses affordable materials that provide durable sliding properties without compromising bio-safety in medical applications.
Solution Approach 2:
The patent changes the surface parameters of the elastic body by applying a coating with specific friction coefficients and surface energy characteristics. This modifies the sliding properties at the surface level without altering the bulk material properties, achieving bio-safe sliding enhancement.
2Ease of operation
If PTFE film is used to provide sliding properties, then sliding properties are improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent replaces expensive PTFE films with a cost-effective surface coating applied to elastic bodies. The coating uses affordable materials and a simpler application process, significantly reducing manufacturing costs while maintaining durable sliding properties through radiation sterilization capability and repeated sliding resistance.
Solution Approach 2:
The patent creates a composite structure by coating the elastic body surface with a sliding-enhancing layer. This composite approach combines the elasticity of the base material with the low-friction properties of the coating, achieving PTFE-like performance at lower cost.
3Ease of operation
If PTFE film is applied to enhance sliding properties, then sliding properties are improved, but durability decreases for repeated sliding applications
Solution Approach 1:
The patent ensures continuous sliding performance by applying a coating that maintains its lubricating properties through radiation sterilization and withstands repeated sliding cycles. The coating's molecular structure is designed to resist wear and maintain low friction over extended use, ensuring durable and reliable sliding properties.
4Ease of operation
If PTFE coating is applied to improve sliding properties, then sliding properties are improved, but radiation sterilization becomes impossible
Solution Approach 1:
The patent develops a radiation-resistant surface coating that can withstand sterilization processes, enabling medical devices to be properly sterilized while maintaining sliding properties. The coating materials are selected for their stability under radiation exposure, ensuring both bio-safety and functional performance.
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 provides a cost-effective means to enhance sliding properties and liquid leakage resistance, ensuring biocompatibility and low protein adsorbability, while avoiding the limitations of expensive and non-durable PTFE films, and maintaining performance in repeated sliding and radiation sterilization scenarios.
Implementation Method 1
step 2 of radically polymerizing a non-functional monomer starting from the polymerization initiation points A to grow non-functional polymer chains
Implementation Method 2
step 3 of forming polymerization initiation points B on a surface of the non-functional polymer chains, radically polymerizing a polymerizable silane compound starting from the polymerization initiation points B, and further reacting a perfluoroether group-containing silane compound to grow functional polymer chains
Data Source
AI summary
Provided are methods for surface-modifying a rubber vulcanizate or a thermoplastic elastomer, which can cost-effectively provide a variety of functions, e.g. sliding properties or liquid leakage resistance. Included is a method for surface-modifying a rubber vulcanizate or a thermoplastic elastomer as a modification target, the method including: step 1 of forming polymerization initiation points A on a surface of the modification target; step 2 of radically polymerizing a non-functional monomer starting from the points A to grow non-functional polymer chains; and step 3 of forming polymerization initiation points B on a surface of the non-functional polymer chains, radically polymerizing a polymerizable silane compound starting from the points B, and further reacting a perfluoroether group-containing silane compound to grow functional polymer chains, or step 3′ of adding a silane compound to a surface of the non-functional polymer chains and further reacting a perfluoroether group-containing silane compound to grow functional polymer chains.