基于聚酰胺树枝状分子的QCM甲醛传感器研究

Research on the QCM Formaldehyde Sensor Based on Polyamide Dendrimers

以乙二胺为核通过Michael加成和酰胺化缩合反应合成了0．5～4．0代的聚酰胺树形分子，采用核磁共振（NMR）、红外光谱（FI—IR）进行了结构表征，并将其作为敏感材料与QCM（石英晶体微天平）换能器相结合构建谐振式甲醛传感器．研究表明：由于该树状分子表面富氨基官能团，对甲醛有着良好的特异性响应，其高度的黏性，也使其能稳定地在QCM表面成膜，经过反复测定，该传感器具有高度的重复稳定性．

By using ethylenediamine as a core, we synthesized 0.5 to 4.0 generation of polyamide dendrimers with Michael addition and amidation condensation reaction. Nuclear Magnetic Resonance （NMR） and Fourier Infrared Spectrum （FI-IR） were employed to characterize the structural of polyamide dendrimers. Polyamide dendrimers acting as sensitive material was combined with transducer of QCM （quartz crystal microbalance） to build a microgravimetric formaldehyde sensor. The research results showed that： the QCM sensor had a good specificity response to formaldehyde, for the rich amino functional groups on the molecular surface. The high viscosity of the dendrimers made it steady on the QCM surface and the sensor presented repetitive stability in repeated measurements.