Drag force of polyethyleneglycol in flow measured by a scanning probe microscope
Drag force of polyethyleneglycol in flow measured by a scanning probe microscope
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通过扫描探针显微镜测量聚乙二醇在流动中的阻力
DOI：
10.1103/physrevfluids.4.074201
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发表时间：
2019
影响因子：
2.7
通讯作者：
Hiroshi Suzuki
中科院分区：
文献类型：
--
作者：
Ruri Hidema;Seika Hayashi;Hiroshi Suzuki
我们提出了一种使用扫描探针显微镜（SPM）测量流动流体中合成聚合物产生的阻力的方法。将甲氧基聚乙二醇硫醇 (mPEG-SH) 连接到 SPM 的悬臂探针上，并将其进一步浸入甘油和聚乙二醇 (PEG) 溶液流中。 mPEG-SH 键合悬臂检测由于流动流体中聚合物-聚合物和聚合物-流体相互作用而产生的额外力。与悬臂探针结合的 mPEG-SH 聚合物的构象被预测为具有茎和椭圆花形状，并计算了由于变形的 mPEG-SH 引起的拖曳力。将使用 SPM 的实验检测到的力与模型计算获得的力进行比较，发现相当接近。
We propose a method to measure the drag force due to synthetic polymers in flowing fluids by using a scanning probe microscope (SPM). Methoxy polyethyleneglycol thiol (mPEG-SH) was attached to the cantilever probe of the SPM, which was further immersed in flows of glycerol and polyethyleneglycol (PEG) solutions. The mPEG-SH-bonded cantilever detects the extra force due to polymer-polymer and polymer-fluids interaction in flowing fluids. The conformation of the mPEG-SH polymer bonded to the probe of the cantilever was predicted as having a stem and ellipsoidal-flower shape, and the drag force due to the deformed mPEG-SH was calculated. The forces detected by experiments using the SPM and the forces obtained by model calculations were compared and found to be reasonably close.