Research on the interaction of hydrogen-bond acidic polymer sensitive sensor materials with chemical warfare agents simulants by inverse gas chromatography.

Liu Yang,Mingyu Ding,Molin Qin,Feng Huang,Shuya Cao,Chenghai Guo,Qiang Han

doi:10.3390/s150612884

Abstract

Hydrogen-bond acidic polymers are important high affinity materials sensitive to organophosphates in the chemical warfare agent sensor detection process. Interactions between the sensor sensitive materials and chemical warfare agent simulants were studied by inverse gas chromatography. Hydrogen bonded acidic polymers, i.e., BSP3, were prepared for micro-packed columns to examine the interaction. DMMP (a nerve gas simulant) and 2-CEES (a blister agent simulant) were used as probes. Chemical and physical parameters such as heats of absorption and Henry constants of the polymers to DMMP and 2-CEES were determined by inverse gas chromatography. Details concerning absorption performance are also discussed in this paper.

Highlights

With the increase in terrorism threats in recent years, rapid on-site detection technologies for hazardous and toxic gases, including chemical warfare agents (CWAs), are drawing more and more attention
Inverse gas chromatography is studied on a stationary phase, when a non-volatile liquid sample is loaded onto the surface of a support, or a solid sample is packed into a separation column as the stationary phase
The retention volumes of 2-chloroethyl ethyl sulfide (2-CEES) passing through the micro packed column at 110°C‒160 °C were recorded in the experiment

Summary

Introduction

With the increase in terrorism threats in recent years, rapid on-site detection technologies for hazardous and toxic gases, including chemical warfare agents (CWAs), are drawing more and more attention. Given the threat posed by these threat [1,2],selective functional membranes play important roles in sensors for nerve agent gas detection. Hydrogen-bonded acidic polymers are important materials in research on hazardous gas enrichment and detection [3,4,5,6,7,8,9].The oxygen atom of the P=O group in nerve agent gases is an electron donor, and according to the Lewis acid-base theory, nerve agent gases are hydrogen-bond based gases, so hydrogen-bonded acidic polymers should have the capability of selectively absorbing nerve agent gases. Using DMMP and 2-CEES as probe molecules, some physical chemistry parameters of the sensor material such as heats of absorption and Henry’s constants were researched in this paper

Chemicals

Synthesis of BSP3 Polymer

Fabrication of the Micro Packed Column

Instrumentation and Procedures

Results and Discussion

Conclusions