离子液体中黏度检测方案(粘度计)

京都電子工業株式会社KYOTO ELECTRONICSAPVS-0108enMANUFACTURING CO.，LTD. APVS-0108en6. Procedure Application Note Temperature dependence of viscosity of ionic liquid 1. Scope Ionic liquid is a substance (salt) which is liquid at 100°C or less and consists only of ions. It is a material that can create various physical properties by the design of anion and cationcomposed， and combinations thereof. Ionic liquids have characteristics such as almost no vapor pressure， no flammability /flammability， high thermal stability， liquid state in wide temperature range， relatively lowviscosity， high ionic conductivity， and so on. In addition， since certain ionic liquids have the property of being insoluble in water and lowpolarity organic solvents， they can be used as a solvent for separation and purification， whichcan be reused during extraction of reaction products. Also it is a substance that has attractedattention as it can be used as an electrolyte. An example of measuring the temperature dependence of the dynamic viscosity of ionic liquidusing an EMS viscometer that can be measured by sealing， sterilization and non-contact wasshown below. 2. Precautions Ionic liquid should be sampled under the nitrogen atmosphere and be measured in sealed statebecause of high hygroscopicity. 3.Post-measurement procedure The sample container and the sample are discarded appropriately. 4. Apparatus EMS Viscometer Control Laptop 5.Reagents · Sample： Ionic liquid (1-butyl-2.3-dimethylimidazolium Tetrafluorodorate) 京都电子工业株式会社-可睦电子(上海)商贸有限公司上海市徐汇区宜山路333号1201室电话：021-54488867 电邮： kemu-kem@163.com网址： http：//www. kem-china. com 1) Enter the following conditions in measurement condition of the sequence mode of controlsoftware. Measurement mode ：Sequence mode Measurement temperature ：20-150℃( heat up at 10℃ interval) Motor rotation speed ：1，000 rpmMeasurement time ：II (10 seconds) in 50℃ or lessI (1 second) in 60℃ or moreRepeat count ：5 times Measurement interval ：5 seconds Waiting time for temperature stability ：10 minutes 2) Place an aluminum spherical probe of p 2 mm and a sample of 300 pL in a container， coverwith a cap and packing， set the sample container in the EMS Viscometer， and click themeasurement button. 7. Example The temperature dependence of viscosity of ionic liquid at 20-150℃ can be confirmedThe measurement results are shown in Figure 1 and Table 1，2. Figure 1. Measurement result about the temperature dependence of viscosity of ionic liquid ( . 京都电子工 业 株式 会 社-可睦电子 (上海 )商贸有限公司 ) 上海市徐汇区宜山路333号1201室网址： http：//www. kem-china.com Table 1. Temperature dependence of viscosity of ionic liquid (20-80℃) (mPa's) Temperature (℃) 20 30 40 50 60 70 80 1st 764 369 198 113 69.5 45.5 31.2 2nd 764 371 198 113 68.8 45.4 31.3 3rd 767 371 198 113 68.7 45.9 31.1 4th 770 370 197 113 68.2 45.4 31.2 5th 765 369 197 114 68.9 45.0 31.1 Mean 766 370 198 113 68.8 45.4 31.2 Standard deviation 3 1 1 0 0.5 0.3 0.1 RSD (%) 0.3 0.3 0.3 0.4 0.7 0.7 0.3 Table 2. Temperature dependence of viscosity of ionic liquid (90-150℃) Temperature (℃) 90 100 110 120 130 140 150 lst 23.5 16.7 12.5 9.70 7.73 6.33 5.05 2nd 23.5 16.7 12.6 9.68 7.73 6.38 5.06 3rd 23.5 16.6 12.5 9.72 7.93 6.29 5.02 4th 23.5 16.7 12.6 9.73 7.73 6.19 5.02 5th 23.5 16.7 12.5 9.70 7.68 6.19 5.02 Mean 23.5 16.7 12.5 9.71 7.76 6.28 5.03 Standard deviation 0.0 0.0 0.1 0.02 0.10 0.08 0.02 RSD (%) 0.0 0.3 0.4 0.2 1.3 1.4 0.4 8. Summary Though the viscosity of ionic liquid is easy to change by hygroscopicity， it can be measuredstably without hygroscopicity by purging the nitrogen into the sample container. Moreover， it ispossible to measure in about 1.5 hours automatically in a wide temperature range of 20-150℃by utilizing the sequence mode. 9.References None. 京都电子工业株式会社-可睦电子(上海)商贸有限公司 上海市徐汇区宜山路333号1201室电话：021-54488867 电邮： kemu-kem@163.com 网址： http：//www.kem-china.com 电话：邮： kemu-kem@com/京都電子工業株式会社KYOTO ELECTRONICSMANUFACTURING CO.，LTD 离子液体在不同温度下黏度变化的研究 离子液体是一种物质(盐)，在100°C或更低的温度下是液体，仅由离子所组成。它是一种可以通过阴离子和阳离子的组合及其组合来产生各种物理性质的材料。离子液体具有无蒸气压、无可燃性/易燃性、热稳定性好、温度范围宽、粘度相对较低、离子电导率较高等特点。另外，由于某些离子液体具有不溶于水和低极性有机溶剂的特点，可作为分离纯化的溶剂，可在反应产物的提取过程中重复使用。它也是一种引起人们注意的物质，因为它可以用作电解质。使用EMS粘度计测量离子液体粘度随温度变化的例子，该粘度计可以通过密封、灭菌和非接触的方式来测量离子液体的粘度。 虽然离子液体的粘度易随吸湿气的变化而变化，但通过将氮气吹入样品容器，可以在不吸湿气的情况下稳定地测定离子液体的粘度。此外，利用序列模式，可以在20~150°C的宽温度范围内，在1.5小时内自动测量。