Ultrasonic Scientific invites rheologists to learn more about the use of ultrasonic spectroscopy for material analysis

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 1 June 2004

Keywords

Citation

(2004), "Ultrasonic Scientific invites rheologists to learn more about the use of ultrasonic spectroscopy for material analysis", Pigment & Resin Technology, Vol. 33 No. 3. https://doi.org/10.1108/prt.2004.12933cab.002

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Emerald Group Publishing Limited

Copyright © 2004, Emerald Group Publishing Limited


Ultrasonic Scientific invites rheologists to learn more about the use of ultrasonic spectroscopy for material analysis

Ultrasonic Scientific invites rheologists to learn more about the use of ultrasonic spectroscopy for material analysis

Keywords: Rheology, Spectra, Materials

Rheologists are being invited to contact Ultrasonic Scientific Ltd for information and demonstrations of the application of high-resolution ultrasonic spectroscopy (HR-US) for high-frequency rheological characterisation of emulsions, suspensions, solutions of polymers and other materials.

High-resolution ultrasonic spectroscopy is a novel analytical technique based on the measurements of parameters of low energy waves of longitudinal deformations propagating through analysed samples. This provides information on the interaction of ultrasonic waves with the samples interior thus allowing the analysis of its physical and chemical properties. The measured values of ultrasonic velocity and attenuation can be recalculated into the longitudinal storage and loss moduli of the sample. Unlike conventional rheometers, which are unable to measure directly the processes and interactions at the microscopic and molecular levels, the new award winning HR-US family of spectrometers from Ultrasonic Scientific have reduced the “guess-work”, enabling the effect of a change in formulation, process, and raw material to be analysed directly, quickly and easily at the nano-level. Very short linear visco- elastic regions (e.g in weak particle gels) can be explored, as the amplitude of the motion induced in the sample is very small. Very short relaxation time processes can also be detected because of the short period of deformation in the ultrasonic wave.

Other benefits of the HR-US technique include:

  • non-destructive;

  • broad dynamic range;

  • enables analysis of intermolecular forces, sample structures, composition, and phase transition;

  • minimum sample preparation;

  • minimum calibration;

  • high-resolution;

  • Small sample volume required;

  • enclosed sample chamber prevents evaporation;

  • excellent temperature control; and

  • digital stirring system allows measurements and stirring at the same time.

Analysis of industrial emulsions and suspensions; pharmaceutical suspension stability; gelation and micro-structure of food colloids; material testing; surfactants and micelles; polymers are just some of the applications of the HR-US technique (Figure 1).

Figure 1 Characterization of surfactants using HR-US 102 ultrasonic spectrometer

For further information about the HR-US technique, or to arrange a demonstration, contact Ultrasonic Scientific. Tel: +353 1 218 0600; E-mail: info@ultrasonic-scientific.com; Web site: www.ultrasonic-scientific.com