A device for detecting the liquid water content in cigarette filters and its preparation method.

An electrochemical detection device integrating a water core, hydrogen evolution catalyst layer, proton exchange membrane, oxygen evolution catalyst layer, and supercapacitor into a cigarette filter has solved the problem of detecting liquid water leakage in cigarette filters, achieving efficient monitoring of liquid water content and improving cigarette quality and smoking comfort.

CN116593549BActive Publication Date: 2026-06-30HUBEI CHINA TOBACCO INDUSTRY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUBEI CHINA TOBACCO INDUSTRY CO LTD
Filing Date
2023-05-18
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing technologies lack effective devices and methods to detect leakage of liquid water in cigarette filters, especially during transportation and storage, which leads to the inability to detect the evaporation of liquid water and the damage to the water-proof and breathable membrane at the end of the filter in a timely manner.

Method used

A detection device comprising a water filter, a hydrogen evolution catalyst layer, a proton exchange membrane, an oxygen evolution catalyst layer, a supercapacitor, and a current sensor is used to detect the permeation and electrolysis reactions of liquid water in situ through electrical signals, and to determine the liquid water content by utilizing the trace current generated by the electrochemical reaction.

Benefits of technology

It enables quantitative and qualitative detection of liquid water in cigarette filters. Its simple and compact structure is compatible with cigarette filters, improving cigarette quality and smoking comfort.

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Abstract

This invention discloses a device and its preparation method for detecting the liquid water content in cigarette filters. The device comprises a water-core filter, a hydrogen evolution catalyst layer, a proton exchange membrane, an oxygen evolution catalyst layer, a supercapacitor, and a current sensor, sequentially bonded together. It can monitor the permeation of liquid water into the cigarette filter and is simple and compact. This device uses an in-situ electrical signal detection method to directly determine whether liquid water has permeated from the water-proof and breathable membrane of the water-core filter, and to quantitatively detect the amount of permeated liquid water. The device has a simple structure, is easy to obtain and process, and has broad prospects for widespread application.
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Citation Information

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