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首页> 外文期刊>Fibres & textiles in Eastern Europe >Solvent Vapour-Sensitive Activated Carbon Submicrofibres Based on Electrospun Polyacrylonitrile Fibre Mat
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Solvent Vapour-Sensitive Activated Carbon Submicrofibres Based on Electrospun Polyacrylonitrile Fibre Mat

机译：基于静电纺聚丙烯腈纤维毡的溶剂蒸汽敏感活性炭超细纤维

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摘要

Precursor polyactylonitrile submicrofibres with a diameter of about 900 nm, electrospun from polyactylonitrile/dimethyl sulfoxide (PAN/DMSO) solution, were carbonised and chemically activated. These submicrofibres, characterised by a porous structure more developed than in the case of standard fibres, were investigated as solvent vapour sensors. Sensitivity to vapours of four different fluids: methanol, acetone, benzene & toluene at a low concentration of 200 ppm, was studied directly for fibres and for ones in a prototype textile multilayer system. In experiments the electrical conductivity of carbon fibres was utilised. The response time and sensority coefficient, indicating quantitative changes in electric resistance due to contact with the solvent vapours, were estimated. The activated carbon submicrofibres are characterised by sensitivity, a very short response time not longer than 20 s, stability, and selectivity in relation to vapours of polar and non-polar solvents. The sensitivity to vapours of polar solvents is higher than that to those of non-polar solvents.
机译：将由聚乙腈/二甲亚砜（PAN / DMSO）溶液电纺制的直径约900 nm的前体聚乙腈亚超细纤维碳化并进行化学活化。这些亚微纤维具有比标准纤维更发达的多孔结构，已被研究用作溶剂蒸汽传感器。直接研究了纤维和原型纺织品多层系统中的四种不同流体（甲醇，丙酮，苯和甲苯）在200 ppm的低浓度下对蒸汽的敏感性。在实验中，利用了碳纤维的电导率。估计了响应时间和感官系数，表明由于与溶剂蒸气接触而引起的电阻的定量变化。活性炭亚微纤维的特点是灵敏度高，响应时间不超过20秒，响应时间短，稳定性好以及相对于极性和非极性溶剂蒸气的选择性。极性溶剂对蒸气的敏感性高于非极性溶剂。

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