DEVELOPMENT OF POLYMER COATINGS WITH HIGH SURFACE-TO-VOLUME RATIO FOR CHEMICAL SENSOR APPLICATION

机译：用于化学传感器的高表面体积比聚合物涂层的开发

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Polymers exhibiting high vapor permeability are widely used as the sensing element in miniature chemical sensors. Glassy and crystalline polymers are not normally employed for sensor coatings because the low permeability results in inadequate analyte uptake. In order to improve coating selectivity, the functionalization of some highly permeable polymers has been used, but these polymers are limited and are not widely available. Here we demonstrate that by increasing the surface to volume ratio of polymer coatings, sensor performance can be significantly improved, particularly in the case of polymers with low vapor permeability. High surface area coatings were deposited using a technique known as Rapid Expansion of Supercritical Solutions. The sensitivity and response time of SAW-based chemical sensors developed from glassy polymers using RESS and airbrushing were compared and the high surface area RESS coatings exhibited significantly enhanced performance.

机译：具有高水蒸气渗透性的聚合物被广泛用作微型化学传感器中的传感元件。玻璃态和结晶态聚合物通常不用于传感器涂层，因为低渗透率会导致分析物吸收不足。为了提高涂层的选择性，已经使用了一些高渗透性聚合物的官能化，但是这些聚合物是受限制的并且不能广泛获得。在此我们证明，通过增加聚合物涂层的表面积与体积之比，可以显着提高传感器性能，尤其是在具有低蒸气渗透性的聚合物的情况下。使用称为超临界溶液的快速膨胀的技术来沉积高表面积涂层。比较了使用RESS和喷枪从玻璃状聚合物开发的基于SAW的化学传感器的灵敏度和响应时间，并且高表面积RESS涂层表现出显着增强的性能。

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《International Symposium on Chemical and Biological Sensors and Analytical Methods II, 2001》|2001年|p.369-375|共7页
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Natalia Levit; Dmitry Pestov; Gary Tepper;
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Virginia Commonwealth University Department of Chemical Engineering 601 W. Main Street Richmond, VA 23284 (USA);

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原文格式 PDF
正文语种 eng
中图分类自动化技术、计算机技术;
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DEVELOPMENT OF POLYMER COATINGS WITH HIGH SURFACE-TO-VOLUME RATIO FOR CHEMICAL SENSOR APPLICATION

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