Plasma ion processing of substrates
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Solution Overview
Problem
Current methods for functionalizing porous materials, especially 3D structures with internal porosity, are limited by the need for complex wet chemistry protocols and the inability to effectively modify internal surfaces.
Innovation Solution
A method involving plasma ion processing, where a gas is flowed through the pores of a porous material and exposed to a pulsed electric field to generate a plasma, allowing for the functionalization of internal surfaces and the covalent attachment of bioactive molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If wet chemistry protocols are used to functionalize porous materials, then surface functionality can be achieved, but the process becomes complex and requires solvents
Solution Approach 1:
The patent replaces wet chemistry protocols (chemical processes requiring solvents and multiple steps) with plasma ion processing (physical process using ionized gas). The plasma process functionalizes surfaces through ion implantation and radical reactions without requiring solvents, heating, or complex chemical protocols, thereby reducing process complexity while achieving the same surface functionality.
Solution Approach 2:
The patent extracts and eliminates the need for solvents and complex chemical protocols from the functionalization process. By using plasma ion processing, the method removes harmful chemical substances and simplifies the procedure to a single-step physical process that achieves surface functionalization without the complications of wet chemistry.
2Area of stationary object
If conventional methods are used, then external surfaces can be treated, but internal surfaces of porous materials cannot be effectively modified
Solution Approach 1:
The patent utilizes the porous structure of the material to its advantage by allowing plasma ions to penetrate and functionalize internal surfaces. The plasma process can access pores and internal cavities that are inaccessible to conventional external treatment methods, enabling comprehensive functionalization of both external and internal surfaces simultaneously.
Solution Approach 2:
The patent introduces plasma as an intermediary medium that can penetrate porous structures. Unlike direct chemical methods that require solvent penetration, the plasma ion beam acts as a mediator that can functionalize surfaces through physical ion implantation and chemical radical reactions, accessing internal surfaces that would otherwise be unreachable.
3Productivity
If simple methods are used, then processing is faster, but functionalization efficiency decreases
Solution Approach 1:
The patent optimizes plasma processing parameters (ion energy, gas composition, pressure, pulse duration) to achieve high functionalization efficiency in a single step. By carefully controlling these parameters, the method maintains reliable and efficient functionalization while eliminating the need for multiple sequential steps required by conventional methods, thereby improving processing speed without sacrificing effectiveness.
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 efficient and simple functionalization of internal surfaces of porous materials, improving their biocompatibility and interaction with cells, while avoiding the use of solvents and complex protocols.
Implementation Method 1
exposing said gas to a pulsed electric field whilst said gas is in said pores; wherein the pulsed electric field is of sufficient strength to ionise said gas to generate a plasma
Implementation Method 2
exposing said gas to a pulsed electric field whilst said gas is in said pores; wherein the pulsed electric field is of sufficient strength to ionise said gas to generate a plasma
Implementation Method 3
Plasma immersion ion implantation (PIII) treatment can be used to change the structure of polymers
Data Source
AI summary
A method for plasma ion processing is described, including flowing a gas into porous material; and exposing the gas to a pulsed electric field whilst the gas is in the pores. The pulsed electric field ionises the gas to generate a plasma. The method may additionally include exposing the porous material to a gas so as to generate functionality. The method may additionally include exposing the functionalised porous material to a functional species so as to covalently attach said functional species to the surfaces of the pores.