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Optical Rheometer RheoScope1; 유변학 시험과 Visualization 을 세계최초로 동시에 가능케한 최첨단의 Rheometer
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MCIK
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2010-11-26 (금) 14:10 |
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* Optical Rheometer RheoScope1 ; Rheology 시험과 Visualization 을 세계최초로 동시에 가능케한 최첨단의 Rheometer - 전세계에서 유일한 새로운 개념의 광학 레오미터 RheoScope1 의 탄생! 유변학적인 현상에 대한 해석은 아주 주요한 연구 과제였습니다. 그러나 RheoScope 1 의 탄생 이전에는 순간 냉각된 시료의 SEM을 통한 간접적 비교, Zeta potential 과 Particle morphology 등 Surface chemistry 정보를 이용한 간접적인 비교 해석의 방법에만 의존해 왔습니다. 그러나 RheoScope 1 의 탄생으로 Steady shear, Dynamics oscillatory shear, Creep & recovery 등 모든 유변학적인 실험중 In-situ 로 정영상 또는 동영상 정보를 취득해 Cluster size variation, Orientation, Coaslence 등 실제 Flow condition하에서 시료의 Image analysis 가 가능해 졌습니다. 고사양의 CS Rheometer에 현미경, Fiber optics, 비데오 카메라및 각도 조절가능한 2개의 편광기가 설치되어 있어서 Gel crystallization 변화 고찰 및 심지어 Bitumen등 검은색 시료의 구조 변화까지도 고찰이 가능해 졌습니다. 즉, RheoScope1 의 탄생으로 유변학적 시험과 광학적 시험의 실시간 동시 수행이 가능하게 되었습니다. - Shear 영향하에서의 구조적 변화의 고찰 (Hemorheology, Gel kinetics & Emulsion 안정도 등) - Particle dynamics 의 정량적 고찰 (Colloid & surface chemistry) Thermo Haake Optical Rheometer RheoScope 1
 Understanding the rheological properties of materials is a challenging issue. Simultaneous rheological and optical measurement Identification of structure changes under shear Quantitative characterization of particle dynamics RheoScope 1 is a unique combination of an optical microscope and a digital video camera integrated underneath the temperature controlled base plate of a universal cone and plate rheometer. It allows the synchronous recording of both the rheological properties and the changes in the microscopic structure of the sample tested. The broad range of applications, the intuitive, easy and automated handling as well as the sophisticated data and image analysis functions of the software, make the RheoScope 1 a versatile instrument that will find its place in research institutes as well as in quality control laboratories. The complete instrument (rheometer, microscope and camera) is controlled by the Thermo Haake RheoWin software which is known for its ease of use. Data, video sequences and images can be visualized on-line as well as stored in various formats for later evaluation and analysis. The RheoScope 1 is capable of performing the standard rheological test methods such as basic viscosity measurements in controlled stress and controlled shear rate mode, yield stress measurements as well as oscillatory measurements for the determination of viscoelastic properties as a function of time and temperature. However the RheoScope 1 does much more: simultaneously with the above mentioned rheological measurements, the shear induced change in structure of the sample is recorded and displayed in the software. Corresponding to each data point (viscosity, shear stress, temperature etc.) a microscopic image of the actual structure is available. Because of this, the relationship between the rheological properties and the structure becomes visible. This is an absolute novelty in rheology and structure analysis! Specifications: Rheology Torque range 0.001 - 100 mNm Speed range 0.025 - 1200 rpm Frequency range 0.0001 - 100 Hz Multiwave 0.01 - 10 Hz Ang. Resolution 300 nano rad Test modes Creep-recovery, CS ramp, CR ramp, OSC Sensors Standard : Polished C70/1°. Optional : Polished plate-plate geometries of various diameters and polished cone-plate geometries of various diameters and angles. Visualization Microscope Servo motor driven focus and position adjustment controlled via software. Lenses Customized to fit the rheological measuring plate. Standard magnification: 20X. Optional magnifications: 10X, 4X. Light source 150W, 12V. wave length range: 380-750 nm. Resolution 1 micron Magnification x 20 Field depth 5 microns Total magnification 850 times on a 17" display. Camera Black and white progressive scan CCD camera, 1/3", 659x494 pixels with C-mount. Data Processing Data acquisition, storage and handling 15 images / second. Standard image format (e.g. TIFF). Separate PC with 17" display and Windows operating system provided. Software RheoWin with integrated image / video acquisition. Additional image analysis software available.
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