Core-Shell Nanoparticles in Porous Polymer Matrix
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Solution Overview
Problem
Current methods for producing inorganic metal or metal-oxide nanoparticles face challenges such as nanoparticle agglomeration, uneven dispersion, size limitations, complex multi-step processes, safety hazards, and inability to scale-up or form complex multi-domain, multi-material nanoparticles.
Innovation Solution
A composite material comprising core-shell nanoparticles is developed, where the core is formed from a decomposed precursor within a substrate's microporosity or nanoporosity, and additional shell layers are formed from different decomposed precursors, allowing for controlled growth and uniform dispersion without agglomeration, using in situ nanomanufacturing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to produce metal or metal-oxide nanoparticles, then nanoparticle production is achieved, but nanoparticle agglomeration occurs and uniform dispersion is difficult to achieve
Solution Approach 1:
The patent applies preliminary action by pre-forming a porous polymer matrix structure before introducing metal precursors. The porous matrix is prepared in advance with controlled pore sizes and distributions, which then serve as templates for nanoparticle formation. This pre-prepared structure prevents agglomeration by providing predetermined separation spaces, achieving uniform dispersion without requiring post-processing dispersion steps.
Solution Approach 2:
The patent utilizes porous materials as the core mechanism to prevent nanoparticle agglomeration. A porous polymer matrix with controlled pore sizes (ranging from microporous to nanoporous structures) is employed as the host structure. Metal precursors are introduced into these pores and decomposed in situ, forming nanoparticles that are physically confined within the porous network. This porous structure provides inherent separation between nanoparticles, ensuring uniform dispersion and preventing agglomeration throughout the composite material.
2Adaptability or versatility
If multi-step processes are used to form nanoparticles and nanocomposites, then complex multi-domain, multi-material nanoparticles can be formed, but the process complexity increases and scalability is reduced
Solution Approach 1:
The patent merges multiple functions into a single integrated process. The porous polymer matrix serves simultaneously as the structural framework, the precursor carrier, the reaction medium, and the dispersion medium. Multiple metal precursors can be introduced and decomposed in sequence within the same porous matrix structure, forming multi-layer core-shell nanoparticles without requiring separate processing steps for each layer. This consolidation reduces process complexity while maintaining the ability to form complex multi-material structures.
Solution Approach 2:
The porous polymer matrix exhibits multi-functionality, serving as both the structural support and the template for nanoparticle formation. The same matrix structure can accommodate different metal precursors, enable sequential deposition of multiple shell layers, and provide the dispersion medium all at once. This universal platform approach allows formation of various multi-material nanoparticle configurations (core-shell, multi-layer, heterostructures) using a single versatile process framework, enhancing adaptability while minimizing device complexity.
3Productivity
If free nanoparticle powders are produced, then nanoparticle production is achieved, but safety hazards and health risks are introduced
Solution Approach 1:
The patent applies the nested doll principle by forming nanoparticles within the confined spaces of the porous polymer matrix structure. The nanoparticles are nested within the porous network, with each nanoparticle confined to its own pore or pore region. This nested configuration prevents free nanoparticle powder formation while maintaining high nanoparticle production. The porous matrix acts as a containment structure that holds nanoparticles in a fixed, non-free state, eliminating the safety hazards associated with free nanoparticle powders while preserving productivity.
4Quantity of substance
If nanoparticle size is increased, then more material can be incorporated, but nanoparticle agglomeration becomes more likely and dispersion uniformity decreases
Solution Approach 1:
The porous polymer matrix provides a structured framework with controlled pore sizes that can accommodate larger nanoparticle volumes while maintaining dispersion uniformity. The pore structure acts as a physical template that prevents agglomeration even as nanoparticle size increases. By adjusting the pore size distribution and matrix structure, the system can incorporate higher quantities of metal material into larger nanoparticles without sacrificing uniform dispersion, as the porous network provides continuous separation between particles throughout the composite.
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 approach enables the production of non-agglomerated core-shell nanoparticles with precise control over size and composition, enhancing material properties and eliminating health hazards associated with free nanoparticle powders, while allowing for the formation of complex structures and scalable production.
Implementation Method 1
The core-shell nanoparticles have a core made from a decomposed product of a first precursor disposed in the microporosity, nanoporosity, or free volume of the substrate
Implementation Method 2
at least one shell layer made from a decomposed product of a second precursor disposed on the core or a shell layer of the first precursor
Data Source
AI summary
A composite having a substrate and a plurality of core-shell nanoparticles. The substrate has microporosity, nanoporosity, or free volume and is a polymer matrix, a metal-organic framework, a micro-porous structure, or a nano-porous structure. The plurality of core-shell nanoparticles each has a core and at least one shell layer. The core is made from a decomposed product of a first precursor disposed in the microporosity, nanoporosity, or free volume of the substrate. The at least one shell layer is made from a decomposed product of a second precursor and is disposed on the core.