In this paper, the design, fabrication and experimental analysis of a piezoelectrically actuated micro squeeze flow rheometer is presented. Being only 30 × 30 × 0.5 mm in size, the micro rheometer is sensitive to very small volumes of the order of 1–10 nL of liquid and light enough to operate at frequencies in the kHz regime, an order of magnitude higher than normally attainable with conventional cone and plate rheometry. Initial experiments show that the response of the rheometer is dependent on the viscoelasticity of the fluid being tested. The prototype was used to measure the moduli of poly(dimethylsiloxane) (PDMS) of viscosity 10 Pa s, a non-volatile viscoelastic fluid, over the frequency range of 10–1000 Hz. Results show good agreement between with the moduli measured using conventional rheometry up to 100 Hz and with values extrapolated up to 1 kHz.
展开▼
机译：本文介绍了压电致动微挤压流变仪的设计，制造和实验分析。微型流变仪的尺寸仅为30×30×0.5 mm，它对很小的体积（大约1–10 nL的液体和光）敏感，足以在kHz频率下工作，比正常情况下高一个数量级。传统的锥板流变仪。最初的实验表明，流变仪的响应取决于被测流体的粘弹性。该原型用于在10–1000 Hz的频率范围内测量粘度为10 Pa s（一种非挥发性粘弹性流体）的聚二甲基硅氧烷（PDMS）的模量。结果表明，与使用常规流变仪测量的模量（高达100 Hz）和推断值（高达1 kHz）之间具有良好的一致性。
展开▼
