Polymer Iodine Complex for Stable Radiation Markers
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Solution Overview
Problem
Existing iodine complexes used in radiation markers and therapeutics have limited binding capacity and durability, especially in high temperature and high humidity environments, and their water solubility leads to iodine loss, restricting their application range.
Innovation Solution
A polymer-based iodine complex is developed, where iodine is complexed with a polymer carrier using structural units represented by specific formulas, allowing for adjustable iodine content and improved binding through coordination bonds and van der Waals forces, enhancing biocompatibility and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If iodine is complexed with water-soluble substances (amino acids, PVP), then the complex is soluble in water and commonly used as plant nutrients and disinfectants, but the application range is limited due to easy solubility in water and/or alcohol
Solution Approach 1:
The patent uses a composite material system consisting of a polymer matrix (containing carbonyl, hydroxyl, or carboxyl groups) combined with iodine molecules. This composite structure provides both controlled solubility through the polymer's properties and enhanced application range through the synergistic interaction between the polymer functional groups and iodine, forming a stable complex that overcomes the limitations of simple water-soluble iodine complexes.
2Measurement precision
If starch is used as iodine carrier, then the complex shows maximum absorption at 620-680 nm with dark blue color for chemical titration, but the binding ability drops sharply when starch is dissolved and spiral structures are destroyed
Solution Approach 1:
The patent changes the structural parameters of the carrier material from natural starch to synthetic or semi-synthetic polymers with specific functional groups (carbonyl, hydroxyl, carboxyl). This parameter change allows the formation of stable iodine complexes that maintain their binding ability regardless of dissolution, as the functional groups remain available for coordination with iodine molecules even in solution, unlike the dissolution-dependent starch spiral structure.
3Shape
If PVA is used as iodine carrier, then iodine molecules can be aligned on the membrane forming a polarizing membrane with uniform bidirectional absorption, but PVA has weak ability to bind iodine molecules and the membrane suffers iodine loss when heated
Solution Approach 1:
The patent introduces specific functional groups (carbonyl, hydroxyl, carboxyl) at local positions within the polymer structure to enhance iodine binding capacity. These localized functional groups provide strong binding sites for iodine molecules while the overall polymer matrix maintains the alignment and uniformity properties needed for polarizing membrane applications, thus improving both binding capacity and thermal stability without sacrificing structural uniformity.
4Ease of manufacture
If existing compound carriers are used for radioactive iodine labeling, then radioactive compounds can be prepared for protein iodination labeling, but the binding capacity is limited and the amount of iodine bound is limited
Solution Approach 1:
The patent designs a universal polymer carrier system with multiple types of functional groups (carbonyl, hydroxyl, carboxyl) that can interact with iodine through various mechanisms (coordination, hydrogen bonding, electrostatic interaction). This multi-functional carrier can accommodate different amounts of iodine labeling and is applicable to various protein substrates, thereby increasing both the quantity of iodine bound and the versatility of the labeling application.
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 polymer-based iodine complex offers improved durability and reduced iodine dissolution, enabling its use as a radiation marker, therapeutic agent, and polarizing film with adjustable iodine content, addressing the limitations of existing complexes.
Implementation Method 1
complexing the polymer comprising a structural unit represented by Formula (I) and optionally at least one of structural units represented by Formula (II), Formula (III) and Formula (IV) as a carrier with iodine, to get the iodine complex
Implementation Method 2
complexing the polymer comprising a structural unit represented by Formula (I) and optionally at least one of structural units represented by Formula (II), Formula (III) and Formula (IV) as a carrier with iodine, to get the iodine complex
Data Source
AI summary
An iodine complex is formed by complexing a unit having a structure as represented by formula (I) with iodine molecules or iodine molecules with polyiodide ions formed by combining iodine ions. As a carrier, a polymer is complexed with iodine to obtain an iodine complex for formula (I).The iodine complex can be used as a radioactive marker, or used in an iodine therapeutic agent, or used in a polarizer. The polymer carrier has good biocompatibility. The content of iodine in the iodine complex can be adjusted according to requirements, and the content of the iodine can be adjusted within a range of 0.001-60%. The difference in the content of the iodine can affect the transmission clarity of the iodine complex as a radiographic marker.