Humidity-Responsive Antibacterial Membrane via CD-MOF Nanogold Embedding
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Solution Overview
Problem
Current functional membrane materials lack effective humidity responsiveness and antibacterial properties, which are essential for applications such as antibacterial packaging.
Innovation Solution
A humidity-responsive antibacterial membrane is developed by incorporating a cyclodextrin metal-organic framework (CD-MOF) loaded with ultrafine gold nanoparticles into a polydimethylsiloxane (PDMS) matrix. This membrane exhibits excellent humidity response and antibacterial properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional membrane materials are used, then the membrane structure is simple and easy to manufacture, but the membrane lacks humidity responsiveness and antibacterial properties
Solution Approach 1:
The patent employs composite materials by integrating cyclodextrin metal-organic framework (CD-MOF) loaded with ultrafine gold nanoparticles into a polydimethylsiloxane (PDMS) matrix. This composite structure combines the mechanical properties of PDMS with the humidity-responsive and antibacterial functionalities of CD-MOF and gold nanoparticles, thereby achieving both structural integrity and enhanced functional performance.
Solution Approach 2:
The patent utilizes the porous structure of cyclodextrin metal-organic framework (CD-MOF) to load ultrafine gold nanoparticles. The porous nature of MOF materials provides a high surface area and controlled pore architecture that enables effective nanoparticle incorporation while maintaining the material's responsiveness to humidity changes, thus achieving antibacterial functionality without compromising structural simplicity.
2Reliability
If CD-MOF loaded with ultrafine gold nanoparticles is incorporated into PDMS matrix, then humidity responsiveness and antibacterial properties are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-loading ultrafine gold nanoparticles onto the cyclodextrin MOF structure before incorporating the complex into the PDMS matrix. This pre-preparation of the nanogold complex within the MOF framework simplifies the overall manufacturing process, as the active antibacterial component is already positioned and stabilized before final membrane formation.
Solution Approach 2:
The patent uses the cyclodextrin MOF structure as an intermediary carrier to deliver ultrafine gold nanoparticles into the PDMS matrix. The MOF acts as a mediating framework that protects the nanoparticles during processing and ensures their controlled release upon humidity exposure, thereby simplifying the integration process while maintaining functional integrity.
3Reliability
If higher loading rate of ultrafine gold nanoparticles is used, then antibacterial efficacy is improved, but the mass content exceeds optimal limits affecting membrane performance
Solution Approach 1:
The patent applies parameter changes by optimizing the loading rate of ultrafine gold nanoparticles within a specific range (0.18-2.33 wt%) rather than using maximum possible loading. This controlled parameter adjustment ensures sufficient antibacterial efficacy while maintaining the membrane's mechanical properties and humidity responsiveness, demonstrating that optimal performance occurs at moderate rather than maximum concentrations.
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 membrane demonstrates a significant increase in antibacterial efficacy against pathogens like Escherichia coli O157: H7 and Staphylococcus aureus, along with improved mechanical properties and humidity responsiveness, making it suitable for antibacterial packaging applications.
Implementation Method 1
CD-MOF has good water solubility and nontoxicity, and features of multi-pores and large specific surface area... Due to its superior cavity structure, CD-MOF could be used as a delivery material
Implementation Method 2
The humidity-responsive antibacterial membrane has excellent humidity response performance and antibacterial properties... demonstrates a significant increase in antibacterial efficacy against pathogens like Escherichia coli O157: H7 and Staphylococcus aureus
Data Source
AI summary
Disclosed are a humidity-responsive antibacterial membrane, and a preparation method and use thereof, which belong to the field of functional membrane materials. The humidity-responsive antibacterial membrane includes a polydimethylsiloxane (PDMS) membrane and an ultrafine nanogold complex embedded in the PDMS membrane, wherein the ultrafine nanogold complex includes a cyclodextrin metal-organic framework (CD-MOF) and ultrafine gold nanoparticles loaded on the CD-MOF. The humidity-responsive antibacterial membrane is formed by a CD-MOF loaded with ultrafine gold nanoparticles, and PDMS, which has excellent humidity response performance and antibacterial properties, and meanwhile good mechanical properties.