Low-toxicity synthesis method of siloxane gas-sensitive material

A technology of gas-sensitive materials and synthesis methods, which is applied in the field of low-toxicity synthesis of siloxane gas-sensitive materials, can solve problems such as polluting the environment and threatening the life and health of operators, achieves toxicity reduction, avoids autoclave explosions, and avoids potential threats Effect

Active Publication Date: 2012-08-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

During the transfer process, the liquefied hexafluoroacetone will inevitably vaporize and leak in...

Method used

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  • Low-toxicity synthesis method of siloxane gas-sensitive material
  • Low-toxicity synthesis method of siloxane gas-sensitive material
  • Low-toxicity synthesis method of siloxane gas-sensitive material

Examples

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Embodiment 1

[0033] In this example, a linear polymethylhydrogensiloxane containing hexafluoroisopropanol substituents was synthesized, the structure of which is figure 1 As shown, the reaction equation can be expressed as:

[0034]

[0035] Its preparation method is as follows:

[0036] Under the protection of nitrogen, put 0.5 g of polymethylhydrogen siloxane into a three-necked bottle, add 30 ml of toluene and 1.6 g of 2-vinylhexafluoroisopropanol, stir well, and then add 1 drop of diethylene Tetramethyldisiloxane platinum complex solution was stirred and reacted at room temperature for 30 hours, the reaction solution turned yellow, and the reaction was stopped. Activated carbon was added to the system and stirred for 3 hours. The active carbon was removed by filtration, the toluene solvent was distilled off by vacuum distillation, and the toluene solvent was evaporated, and vacuum-dried to obtain 2.0 g of a viscous yellow-brown polysiloxane-sensitive material containing hexafluoroi...

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Abstract

The invention discloses a low-toxicity synthesis method of a siloxane gas-sensitive material, which takes liquid 2-ethylenic alkyl hexafluoride isopropyl alcohol as a raw material at the normal temperature, and the siloxane gas-sensitive material can be prepared by the addition reaction between the raw material and hydrogen-containing siloxane under the catalysis of divinyl tetramethyl disiloxaneplatinum coordination, so that hexafluoroacetone which is high in toxicity and is gaseous at the normal temperature can be avoided. The preparation method is simple in method, easy to operate, mild in reaction condition, lower in requirements for experimental facilities and lower in material toxicity, and can simply, practically and efficiently introduce hexafluoro-isopropanol substituent group into silicon hydrogen bond of the hydrogen-containing siloxane.

Description

technical field [0001] The invention relates to the technical field of siloxane gas-sensitive materials, in particular to a low-toxic synthesis method of siloxane gas-sensitive materials. Background technique [0002] Organophosphorus compounds are a class of neuroinhibitory compounds that can act on acetylcholinesterase in organisms to inactivate them, leading to serious dysfunction of the central nervous system and peripheral choline nervous system. They have strong lethality, fast action speed, and It is difficult to protect, so it is widely used in pesticides and chemical weapons. The detection and analysis of organophosphorus toxic substances has always been a research hotspot in the field of environmental monitoring and chemical defense in various countries in the world. Among the various technologies suitable for on-site detection, surface acoustic wave sensor technology has attracted the most attention. The sensitivity and selectivity of surface acoustic wave senso...

Claims

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Application Information

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IPC IPC(8): C08G77/385C07F7/08
Inventor 杜晓松王洋蒋亚东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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