Nanosilver Porous Material Particles for Stable Antiseptic Coating
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Solution Overview
Problem
Existing silver-activated carbon products with non-nanometric silver particles have low bacteriostatic efficiency and can lead to environmental pollution due to silver leaching, despite their antiseptic properties.
Innovation Solution
Manufacturing nanosilver porous material particles by mixing a nanosilver precursor and a fixation agent with porous material particles, allowing adherence and subsequent baking to create a stable nanosilver coating, which is then dried and filtered, optimizing the weight ratios and processing conditions for enhanced adherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the silver content on activated carbon is increased to enhance bacteriostasis, then the antiseptic efficiency is improved, but environmental pollution and water quality degradation occur due to silver leaching
Solution Approach 1:
The invention changes the particle size parameter of silver from conventional micrometer level to nanometer level (10-100 nm). This parameter change enables the silver particles to exhibit different surface charge properties and attachment behaviors, allowing effective bacteriostasis at lower concentrations while reducing leaching pollution.
Solution Approach 2:
The invention creates a composite material system combining activated carbon with nanosilver particles. The composite leverages the adsorption capability of activated carbon and the antibacterial properties of nanosilver, achieving synergistic effects that improve bacteriostasis while minimizing silver release through the porous structure retention.
2Ease of manufacture
If conventional silver particles are used on activated carbon, then the manufacturing process is simple, but the bacteriostatic efficiency is low due to large particle size
Solution Approach 1:
The invention applies parameter change by reducing silver particle size to nanometer scale (10-100 nm) while maintaining a relatively simple manufacturing process using wet chemical reduction method. This enables effective bacteriostasis without significantly complicating the production process.
3Reliability
If nanosilver particles are used to achieve high bacteriostatic efficiency, then the antiseptic performance is improved, but the manufacturing process complexity increases
Solution Approach 1:
The invention applies preliminary action by pre-synthesizing nanosilver particles in solution before impregnating the activated carbon. The nanosilver precursor solution is prepared in advance with controlled concentration and composition, allowing the particles to form uniformly on the carbon surface during the impregnation step, thereby simplifying the overall manufacturing process.
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 method results in nanosilver particles with strong adherence to the surface of porous material particles, maintaining high adsorbability and antiseptic efficacy while preventing silver leaching, thus enhancing bacteriostasis without environmental pollution.
Implementation Method 1
the nanosilver precursor to adhere on the surface of the porous material particles
Implementation Method 2
a solution of the nanosilver precursor and a fixation agent are mixed to form a mixture
Implementation Method 3
the suspension is filtered to separate the porous material particles from the solution
Implementation Method 4
the resulting porous material particles is baked and dried
Data Source
AI summary
Nanosilver porous material particles and method for manufacturing the same are disclosed. The nanosilver porous material particles include nanosilver particles distributed on the surface thereof. First, a nanosilver precursor is dissolved in water and a proper quantity of a fixation agent is added to form a solution. Next, a proper quantity of the porous material particles is added into the solution and that is mixed well to form a suspension. Next, the suspension is allowed to stand for a predetermined period of time, and then the suspension is filtered to separate the porous material particles from the solution. Finally, the resulting porous material particles are baked and dried.