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A device for quantitatively evaluating the stability of nanoparticle suspensions

A nanoparticle, quantitative evaluation technology, applied in the measurement of color/spectral properties, analytical materials, instruments, etc., can solve the problem of low test efficiency, complicated operation to measure the stability of nanoparticle suspensions, and unstable stability of nanoparticle suspensions tested by DLS. Accuracy and other issues to achieve the effect of improving test efficiency, overcoming complex and tedious operations, and avoiding inaccuracy

Inactive Publication Date: 2018-04-13
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the inaccuracy of DLS testing the stability of nanoparticle suspension and the problems of cumbersome operation and low test efficiency of traditional UV-visible spectrophotometer to measure the stability of nanoparticle suspension

Method used

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  • A device for quantitatively evaluating the stability of nanoparticle suspensions
  • A device for quantitatively evaluating the stability of nanoparticle suspensions

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Embodiment Construction

[0013] Such as figure 1 and figure 2 As shown, the suspension of chloroform multi-walled carbon nanotubes is dropped into the measuring pool of the measuring device of the present invention. In the present invention, chloroform is preloaded in the solvent pool. After the first measurement of the measuring device, the display device shows that the carbon nanometer The absorbance of the tube suspension at a wavelength of 660nm is greater than 0.7Abs, and the dilution factor is selected through the control panel. After 100 times of dilution, the absorbance of the carbon nanotube suspension at a wavelength of 660nm is measured at 0.1-0.7Abs.

[0014] Select the number of measurements to be 7 and the interval time to be 30 minutes through the control panel, and record them as absorbance A1, A2, A3, A4, A5, A6, A7 in sequence, and the amount of precipitation according to the formula Calculate the amount of sedimentation, and in the coordinate system with time as the abscissa and ...

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Abstract

The present invention relates to the field of nano-particles, and in particular relates to a nanoparticle suspension stability quantitative evaluation device which includes a control panel, a measuring cell, a control chip, a display device, an ultrasonic generation means, an absorbance measuring means connected with the measuring cell, and a solvent tank connected with the measuring cell by a flow valve, when a nanoparticle suspension to be evaluated is dropped into the measuring cell, the absorbance measuring means automatically first tests absorbance, and current absorbance can be displayed by the display device. The nanoparticle suspension stability quantitative evaluation device overcomes the complex and cumbersome operation of a traditional UV-Vis spectrophotometer, avoids DLS measurement result inaccuracy, improves test efficiency, can quantitatively, rapidly and accurately describe the solubility, stability and dispersibility of the nanoparticle suspension.

Description

technical field [0001] The invention relates to the field of nanoparticles, in particular to a device for quantitatively evaluating the stability of nanoparticle suspensions. Background technique [0002] As a new type of material that affects human development in the 21st century, nanoparticles have many properties (optical, electrical, thermal, mechanical properties) that conventional materials do not have, and have bright and extensive application prospects. However, the size effect and surface effect of nanoparticles make them very prone to spontaneous aggregation, which greatly limits the application of nanomaterials. Scientists disperse nanoparticles according to the reasons of nanoparticle agglomeration and have achieved outstanding results, but quantitatively describing the dispersion and stability of nanoparticle suspensions is still a difficult problem in the field of nanomaterials. [0003] Some scientists use ultraviolet-visible spectrophotometer (UV-vis) to qua...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/04G01N21/31
CPCG01N15/04G01N21/31
Inventor 马婧南茜赵敬刘建强任炜桦
Owner TAIYUAN UNIV OF TECH
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