Encapsulated Volatile Liquid Source for Aerosol Systems
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Solution Overview
Problem
Existing aerosol-generating systems face challenges in retaining volatile delivery enhancing compounds and nicotine during storage, as they tend to degrade or evaporate, leading to instability and reduced efficacy.
Innovation Solution
An aerosol-generating system with an encapsulated volatile liquid source, where a sorption element with a volatile liquid is sealed by a wax with a melting point between 40°C and 120°C, preventing evaporation and degradation, and allowing controlled release upon heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the volatile liquid is stored without encapsulation, then the aerosol-generating system can be simple in structure, but the volatile liquid will evaporate and degrade during storage
Solution Approach 1:
The sorption element containing the volatile liquid is nested within a sealant matrix, forming a encapsulated structure. This nested configuration protects the volatile liquid from evaporation and degradation while maintaining a compact and relatively simple overall system structure.
Solution Approach 2:
The sealant forms a protective shell around the sorption element, creating a barrier that prevents evaporation and degradation of the volatile liquid. This shell encapsulation provides protection while keeping the system structure manageable.
2Reliability
If the volatile liquid is retained during storage, then stability is improved, but the liquid may not be released efficiently when needed
Solution Approach 1:
The sealant's melting point is specifically selected to be between 40°C and 120°C, creating a temperature-dependent release mechanism. During storage at ambient temperatures, the sealant remains solid and retains the volatile liquid. During use, when heated to the sealant's melting point or above, the sealant melts and releases the volatile liquid efficiently.
Solution Approach 2:
The sealant undergoes a phase transition from solid to liquid at its melting point (40°C-120°C). This phase change enables controlled release of the volatile liquid: the sealant remains solid during storage to retain the liquid, then melts during heating to release it efficiently.
3Productivity
If a sealant with low melting point is used, then controlled release at lower temperatures is achieved, but the sealant may melt during storage in warm conditions
Solution Approach 1:
The sealant's melting point is optimized to be between 40°C and 120°C, which is low enough to enable controlled release during normal use but high enough to prevent accidental melting during typical storage conditions, including warm environments.
Solution Approach 2:
The system uses temperature as a feedback parameter to control release. The sealant's melting point creates a natural threshold: below this temperature, the system retains the volatile liquid; above this temperature, the system releases it. This provides automatic temperature-dependent control without additional complexity.
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
This approach significantly improves the retention and stability of volatile liquids during storage and enables controlled, temperature-dependent release of nicotine salt particles, maintaining their potency and ensuring consistent delivery.
Implementation Method 1
a sealant having a melting point of between about 40°C and about 120°C encapsulating the sorption element
Implementation Method 2
the sealant has a melting point of between about 40°C and about 120°C
Data Source
Figure 1~2
Figure 3(a)~3(c)
AI summary
An aerosol-generating system comprises an encapsulated volatile liquid source comprising: a sorption element; a volatile liquid having a vapour pressure of at least about 20 Pa at 25°C sorbed on the sorption element; and a sealant having a melting point of between about 40°C and about 120°C encapsulating the sorption element. The volatile liquid comprises a 2-oxo acid.