Polymerisation station for grafting a bioactive coating
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Solution Overview
Problem
Current methods for grafting bioactive polymers onto articles, such as PolyNaSS on polymers or ceramics, are not scalable for industrial use, lacking repeatability and efficiency in large-scale oxidation and grafting processes.
Innovation Solution
A polymerization station with two reactors is used, where the first reactor performs ozonation and radical polymerization consecutively in different solutions, and the second reactor prepares and heats the monomer solution for transfer to the first reactor, allowing for sequential oxidation and grafting while optimizing the monomer solution's readiness and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If oxidation and grafting are performed in the same reactor sequentially, then productivity is improved by reducing treatment time, but device complexity increases due to the need for multiple reactors and solution transfer systems
Solution Approach 1:
The process is divided into two separate reactors: the first reactor performs oxidation with ozone, and the second reactor performs grafting with monomer solution. This segmentation allows each reactor to be optimized for its specific function while enabling sequential processing without cross-contamination, thereby improving overall productivity through efficient time utilization.
Solution Approach 2:
The monomer solution is prepared in advance in the second reactor before the oxidation step is completed in the first reactor. This preliminary preparation of the grafting solution ensures that when articles are transferred to the second reactor, the grafting process can immediately begin without waiting for solution preparation, thus reducing total treatment time and improving productivity.
2Manufacturing precision
If monomer solution is prepared in a separate second reactor, then manufacturing precision is improved by optimizing solution temperature and readiness, but device complexity increases due to additional reactor and transfer mechanisms
Solution Approach 1:
The monomer solution is prepared and heated to the required temperature in the second reactor before the oxidation process in the first reactor is completed. This preliminary action ensures that the solution is ready at optimal temperature and concentration when articles are transferred for grafting, improving manufacturing precision and reproducibility of the grafting process.
Solution Approach 2:
The second reactor acts as an intermediary system that prepares the monomer solution under controlled conditions before transferring it to the first reactor for the actual grafting process. This intermediary step allows for precise control of solution parameters independent of the oxidation process, ensuring optimal grafting conditions.
3Productivity
If articles are immersed in monomer solution after oxidation, then grafting efficiency is improved, but loss of time occurs during solution exchange between steps
Solution Approach 1:
The monomer solution is prepared in advance in the second reactor while oxidation is occurring in the first reactor. This preliminary preparation eliminates waiting time during solution exchange, as the grafting solution is already ready when articles are transferred from the oxidation step, thereby improving grafting efficiency without time loss.
Solution Approach 2:
The overlapping of monomer solution preparation in the second reactor with the oxidation process in the first reactor ensures continuous useful action. While oxidation is occurring, the grafting solution is being prepared simultaneously, so that when articles move to the second reactor, grafting can begin immediately without interruption or time loss.
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 approach enables efficient, controlled, and rapid oxidation and grafting of articles on an industrial scale by preparing the monomer solution during the oxidation step, reducing overall treatment time and ensuring optimal conditions for grafting.
Implementation Method 1
an ozone inlet for creating ozone bubbling in the first tank in order to oxidize the surface of the articles immersed in water
Implementation Method 2
the first tank comprises a first double wall so as to define a peripheral circuit for the circulation of a heat transfer fluid, such as oil, in order to heat the contents of the first tank to a predetermined temperature
Implementation Method 3
a grafting step by radical polymerization in a polymerization station
Data Source
AI summary
Disclosed is an oxidation and grafting method for grafting a bioactive polymer, such as polyNaSS, onto an article, in particular a polymer or ceramic article, the method comprising a step of oxidation by ozonation and a step of grafting by radical polymerisation in a polymerisation station comprising a first reactor (R1), the method being characterised in that the two steps of oxidation and grafting are carried out consecutively in different solutions in the reactor (R1) of the polymerisation station.