Composite Adsorbent for Dual-Polarity Body Odor Marker Capture
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Solution Overview
Problem
Existing methods for body odor analysis, such as SPME and INME, face challenges in applying adsorbents to human skin due to damage from external environments and the need for adsorbents that can effectively adsorb both polar and non-polar substances.
Innovation Solution
A method is developed to create an adsorbent by forming a graphene oxide;polyaniline (GO;PANI) compound layer through electrochemical polymerization, followed by growing zinc oxide nanorods and reacting with a zeolitic imidazolate framework-8 (ZIF-8) to create a composite layer capable of adsorbing both polar and non-polar substances, enhancing adsorption efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SPME method is used for body odor analysis, then adsorption of volatile markers can be achieved, but the adsorbent is easily damaged when exposed to external environment
Solution Approach 1:
The patent creates a composite adsorbent structure combining polyaniline (PANI) with graphene oxide (GO) and zinc oxide nanorods (ZNRs). This composite material integrates the advantages of each component: PANI provides adsorption capacity for volatile markers, GO enhances structural stability and protects against environmental damage, and ZNRs contribute to both mechanical strength and additional adsorption sites. The composite structure resolves the contradiction by maintaining adsorbent durability while preserving adsorption functionality.
2Ease of operation
If INME method is used for easy application, then operational simplicity is improved, but adsorbent must adsorb both polar and non-polar substances simultaneously
Solution Approach 1:
The patent applies local quality by creating heterogeneous regions within the adsorbent structure. The composite material contains domains with different chemical properties: PANI regions for non-polar adsorption, GO regions with oxygen functional groups for polar adsorption, and ZNRs providing additional surface sites. This spatial distribution of different adsorption characteristics within a single material enables simultaneous adsorption of both polar and non-polar volatile markers while maintaining operational simplicity of the INME method.
3Ease of manufacture
If simple adsorbent structure is used, then manufacturing ease is improved, but adsorption capacity for body odor markers is insufficient
Solution Approach 1:
The patent employs preliminary action by pre-synthesizing and characterizing the composite PANI-GO-ZNRs material before its application in the INME device. The multi-step synthesis process (electropolymerization of aniline in the presence of GO, followed by ZNR growth) is performed in advance to create a material with optimized adsorption properties. This preliminary preparation ensures high adsorption capacity while allowing the final application to remain simple, as the complex material structure is already established before deployment.
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 adsorbent significantly improves adsorption capacity, ensuring high reproducibility in odor analysis for skin aging diagnosis, with enhanced thermal stability and improved detection of body odor volatile markers.
Implementation Method 1
forming a graphene oxide;polyaniline (GO;PANI) compound layer through an electrochemical polymerization reaction of an electrolyte including graphene oxide and an aniline monomer
Implementation Method 2
forming a graphene oxide;polyaniline/zinc oxide nanorods (GO;PANI/ZNRs) composite layer by growing zinc oxide nanorods on the GO;PANI compound layer
Implementation Method 3
forming a graphene oxide;polyaniline/zinc oxide nanorods/zeolitic imidazolate framework-8 (GO;PANI/ZNRs/ZIF-8) composite layer by reacting the GO;PANI/ZNRs composite layer with a 2-methylimidazole (2-MI) solution
Implementation Method 4
an adsorbent capable of adsorbing both polar substances and non-polar substances
Data Source
AI summary
A method for preparing an adsorbent for a skin aging diagnosis based on a body odor volatile marker according to an embodiment of the present disclosure comprises: forming a graphene oxide;polyaniline (GO;PANI) compound layer through an electrochemical polymerization reaction of an electrolyte including graphene oxide and an aniline monomer; forming a graphene oxide;polyaniline/zinc oxide nanorods (GO;PANI/ZNRs) composite layer by growing zinc oxide nanorods on the GO;PANI compound layer; and forming a graphene oxide;polyaniline/zinc oxide nanorods/zeolitic imidazolate framework-8 (GO;PANI/ZNRs/ZIF-8) composite layer by reacting the GO;PANI/ZNRs composite layer with a 2-methylimidazole (2-MI) solution.