Light-driven filtration antibacterial composite membrane and preparation method and use thereof
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current antibacterial materials face challenges such as weak antibacterial activity, short antibacterial duration, and limited functionality under darkness, while also being cumbersome to prepare and contaminated with impurities.
Innovation Solution
A light-driven filtration antibacterial composite membrane is developed by mixing dichloromethane and N,N-dimethylformamide with polycaprolactone (PCL) particles and zeolite imidazole framework-8 (ZIF-8) powder, followed by electrospinning onto a PPCL@PDA/TAEG melt-blown membrane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antibacterial materials are used, then antibacterial function is provided, but antibacterial activity is weak and antibacterial time is short
Solution Approach 1:
The patent uses a composite structure combining PPCL base membrane with PDA@TAEG coating layer containing ZIF-8 nanoparticles. This composite material integrates the mechanical properties of PPCL with the light-driven antibacterial properties of PDA@TAEG/ZIF-8, achieving both strong initial antibacterial activity and sustained long-term antibacterial effect through the controlled release mechanism of ZIF-8
Solution Approach 2:
The patent modifies the chemical composition parameters by incorporating specific ratios of dopamine (PDA), terephthalaldehyde (TA), and EGCG in the coating layer, and optimizing ZIF-8 nanoparticle concentration (0.1-1.5 wt%). These parameter changes enable the material to maintain high antibacterial activity while extending antibacterial duration through controlled degradation and release
2Reliability
If photosensitizers are used for light-driven antibacterial, then antibacterial function is enhanced, but the material is not clean and preparation is cumbersome
Solution Approach 1:
The patent merges multiple functions into a single integrated coating layer: PDA provides the photosensitizer base, TA forms the crosslinked network structure, and ZIF-8 nanoparticles provide both structural support and controlled release capability. This merging eliminates the need for separate preparation steps for each component, simplifying the overall manufacturing process while maintaining clean material composition
Solution Approach 2:
The PDA@TAEG matrix acts as an intermediary carrier that encapsulates ZIF-8 nanoparticles, protecting them during handling and preparation while enabling controlled release. This intermediary structure simplifies preparation by allowing simultaneous incorporation of multiple components in a single coating process rather than requiring separate assembly steps
3Adaptability or versatility
If most antibacterial materials work under ultraviolet or near-infrared light, then light-driven antibacterial is achieved, but they cannot work under darkness
Solution Approach 1:
The patent creates a dual-mode antibacterial system where PDA@TAEG provides light-driven antibacterial activity through photosensitization, while ZIF-8 nanoparticles provide darkness-mode antibacterial activity through controlled release of antimicrobial agents. This multi-functionality allows the same material to effectively combat bacteria under both light and darkness conditions
Solution Approach 2:
The patent establishes a periodic action mechanism where the material switches between light-driven mode (when light is available) and controlled release mode (when light is unavailable). The ZIF-8 nanoparticles continuously release antimicrobial agents at controlled rates, ensuring antibacterial protection persists through darkness periods, creating a complementary cyclic operation between the two modes
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 resulting membrane exhibits a high filtration efficiency of 99.9% for PM2.5 particles, maintains antibacterial properties under both light and darkness, and demonstrates improved rechargeable, storable, and antibacterial properties.
Implementation Method 1
spraying the PCL/ZIF-8 spinning solution onto a PPCL@PDA/TAEG melt-blown membrane to obtain the light-driven filtration antibacterial composite membrane
Implementation Method 2
adding a zeolite imidazole framework-8 (ZIF-8) powder to the electrospinning solution, and ultrasonically dispersing for at least 1 hour to obtain a PCL/ZIF-8 spinning solution
Implementation Method 3
immersing the PPCL melt-blown membrane in the PDA solution for 8-15 hours, taking out, washing and drying to obtain a PPCL@PDA melt-blown membrane (i.e., a membrane formed by growing PDA onto the PPCL melt-blown membrane)
Data Source
AI summary
Disclosed are a light-driven filtration antibacterial composite membrane and a preparation method and use thereof. The method for preparing the light-driven filtration antibacterial composite membrane includes: mixing dichloromethane and N,N-dimethylformamide to obtain a first solution; adding PCL particles to the first solution, and stirring until being uniform to obtain an electrospinning solution; adding a ZIF-8 powder to the electrospinning solution, and ultrasonically dispersing for at least 1 hour to obtain a PCL/ZIF-8 spinning solution; spraying the PCL/ZIF-8 spinning solution onto a PPCL@PDA/TAEG men-blown membrane to obtain the light-driven filtration antibacterial composite membrane.