Molecularly Imprinted Polymer Nanoparticles for Formaldehyde Sensing with QCM.
Molecularly Imprinted Polymer Nanoparticles for Formaldehyde Sensing with QCM.
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DOI：
10.3390/s16071011
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发表时间：
2016-06-30
期刊：
影响因子：
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通讯作者：
Lieberzeit PA
中科院分区：
文献类型：
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作者：
Hussain M;Kotova K;Lieberzeit PA
在此，我们报告了用于检测气流中甲醛蒸汽的分子印迹聚合物（MIP）。由苯乙烯、甲基丙烯酸和乙二醇二甲基丙烯酸酯组成的共聚物薄膜在石英晶体微天平 (QCM) 上的干燥空气中甲醛检测限为 500 ppb。令人惊讶的是，这些 MIP 在针对一系列挥发性有机化合物 (VOC)（例如乙醛、甲醇、甲酸和二氯甲烷）进行测试时表现出特定的行为。尽管原则上 MIP 是一种合适的受体，但由于表面被水饱和，MIP 不适用于 50% 湿度下的测量。通过烯丙胺将伯氨基引入聚合物并将涂层形态从薄膜改变为纳米粒子，克服了这一问题。这导致与以前相同的检测限 (500 ppb) 和选择性，但在 50% 相对湿度的现实条件下。
Herein, we report on molecularly imprinted polymers (MIPs) for detecting formaldehyde vapors in air streams. A copolymer thin film consisting of styrene, methacrylic acid, and ethylene glycol dimethacrylate on quartz crystal microbalance (QCM) yielded a detection limit of 500 ppb formaldehyde in dry air. Surprisingly, these MIPs showed specific behavior when tested against a range of volatile organic compounds (VOCs), such as acetaldehyde, methanol, formic acid, and dichloromethane. Despite thus being a suitable receptor in principle, the MIPs were not useful for measurements at 50% humidity due to surface saturation by water. This was overcome by introducing primary amino groups into the polymer via allyl amine and by changing the coating morphology from thin film to nanoparticles. This led to the same limit of detection (500 ppb) and selectivity as before, but at the real-life conditions of 50% relative humidity.