Abstract
The development of gas sensors for detecting alcoholic vapors with a low molecular weight is essential for environmental protection, industrial process control, and the monitoring of the living atmosphere in daily life to avoid health problems in human beings. Here, poly (lactic acid) (PLA)/shellac/PLA sandwich-structural membranes were fabricated via an electrospinning approach and the interaction with alcoholic vapors with a low molecular weight was investigated. It was found that the PLA/shellac/PLA sandwich-structural membrane exhibited fast response to the alcoholic vapors with low molecular weight, especially for methanol vapor. After being treated with alcohol vapor with a low molecular weight, the PLA/shellac/PLA sandwich-structural membrane could change its transmission in a short time (~5 s) and with a concentration of 10 wt% of methanol (ethanol) in water. In the meantime, the PLA/shellac/PLA sandwich-structural membrane can hopefully be potentially used again after evaporating the alcoholic vapor at an elevated temperature.
Highlights
Gas detection has played an important role in industries, medicines and environment, such as industrial process control [1], environmental pollution monitoring [2], medical respiratory analysis [3,4], and alcoholic detection for drivers and explosive gas leakage detection [5]
We report that the PLA/shellac/PLA sandwich-structural is easy to process and test accurately using the PLA/shellac/PLA sandwich-structural membrane via membrane will become transparent when exposed to alcoholic vapors with a low molecular weight, an electrospinning method
A PLA/shellac/PLA sandwich composite electrospun fiber membrane was for sensing alcoholic vapor with a low molecular weight
Summary
Gas detection has played an important role in industries, medicines and environment, such as industrial process control [1], environmental pollution monitoring [2], medical respiratory analysis [3,4], and alcoholic detection for drivers (there were 900,000 people who drove after drinking alcohol in the 1st half of 2019 in mainland China) and explosive gas leakage detection [5]. Most alcoholic vapor sensors with low molecular weights produced by inorganic materials, metallic oxides and their composites are fabricated using complex processes with high costs, and they cannot work at room temperature in particular. These materials are not biodegradable after use, leading to unnecessary environmental pollution. We report that the PLA/shellac/PLA sandwich-structural is easy to process and test accurately using the PLA/shellac/PLA sandwich-structural membrane via membrane will become transparent when exposed to alcoholic vapors with a low molecular weight, an electrospinning method. An effective and biodegradable sensor can be made to detect the alcoholic vapor with a low molecular weight
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