A simple route to functionalize siloxane polymers for DMMP sensing

Abstract

Hexafluoroisopropanol (HFIP) was the most widely used functional group for nerve agents detection. However, to incorporate HFIP group into a polymer backbone, highly toxic hexafluoroacetone gas was needed in a conventional synthetic route. In this article, a new route with low toxicity was proposed to synthesize a strong hydrogen-bond acidic (HBA) siloxane polymer by using 2-vinylhexfluoroisopropanol as the raw material in the hydrosilylation reaction. The synthesized fluoroalcoholic linear polysiloxane (LSFA) was characterized by FT-IR, confirming its molecular structure was much similar to SXFA, a well-established HBA polymer synthesized by the conventional route. TGA data verified the adduct's thermal stability. The dimethyl methylphosphonate (DMMP) sensing properties of LSFA and SXFA, along with PLF, were compared basing on the surface acoustic wave (SAW) platform. The results demonstrated that the conventional synthetic route was somewhat difficult to handle and control, while the new route was simpler, easier and was an effective and promising alternative.

Fluorophenol-Containing Hydrogen-Bond Acidic Polysiloxane for Gas Sensing-Synthesis and Characterization

“…The analyses were performed in DMSO with a concentration of 10 wt.%. The 1H and 13 C spectra were referenced to tetramethylsilane (TMS, δ 0.00 ppm) protons and carbons, respectively. The 19 F spectra were referenced to CCl 3 F (0.00 ppm).…”

“…The structure of PMFOS is presented in Figure 2. [14]; (b) PLF [12]; (c) LSFA [13]; (d) PMPS [17]; (e) PMDFPS [18]; (f) DKAP [19,20].…”

Simple biosensing method to detect DMMP based on QCM transducer and acetylcholine esterase sensitive film

“…Among all the design considerations, sensing material is an essential factor that greatly influences the above sensing performance. In this literature, strong hydrogen‐bond acidic chemical polymers including poly (vinylidene fluoride) [5], fluoroalcoholpolysiloxane, and fluoroalcoholic linear polysiloxane [6, 7] are mostly applied to detect DMMP. In the above‐mentioned polymers, hexafluoroisopropanol is the common functional group [8].…”

“…In this literature, strong hydrogen-bond acidic chemical polymers including poly (vinylidene fluoride) [5], fluoroalcoholpolysiloxane, and fluoroalcoholic linear polysiloxane [6,7] are mostly applied to detect DMMP. In the above-mentioned polymers, hexafluoroisopropanol is the common functional group [8]. However, in the polymer synthesis process, highly toxic hexafluoroacetone gas is inevitably used and high-pressure reactor is applied, which will impose dangerous workplace to relevant personnel [8][9][10].…”

“…In the above-mentioned polymers, hexafluoroisopropanol is the common functional group [8]. However, in the polymer synthesis process, highly toxic hexafluoroacetone gas is inevitably used and high-pressure reactor is applied, which will impose dangerous workplace to relevant personnel [8][9][10].…”