Method for analyzing ageing mechanism of dense colloid

A kind of aging mechanism and colloidal technology, applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problem of not being able to accurately describe the law of mean square displacement of colloidal particles in dense colloids, and achieve the effect of wide engineering application prospects

Active Publication Date: 2017-09-08
HOHAI UNIV
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Problems solved by technology

[0005] The above-mentioned existing patent technology method does not directly analyze the aging mechanism from the perspective of diffusion, and the logarithmic diffusivity involved in it has obvious limitations, and cannot fully and accurately describe the mean square of colloidal particles in the aging process of dense colloids. Displacement law

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  • Method for analyzing ageing mechanism of dense colloid
  • Method for analyzing ageing mechanism of dense colloid
  • Method for analyzing ageing mechanism of dense colloid

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Embodiment

[0036] Embodiment: a kind of method of analyzing dense colloidal aging mechanism, such as figure 1 As shown, the specific operation steps are as follows:

[0037] (1) In this embodiment, dense colloidal glass is selected as the research object. Through the particle tracking test method, a confocal microscope is used to observe the trajectory of the labeled colloidal particles during the aging process, and the observation time interval is t w1 = 1s and t w1 =20s, wherein the number of colloidal particles is 2400, and the radius of the particles is 1.18 microns.

[0038] (2) Using the trajectory of particles in step (1) to calculate the mean square displacement of colloidal particles, the growth trend of the mean square displacement of colloidal particles under two different observation time intervals, see respectively figure 2 and image 3 The experimental data marked in .

[0039] (3) Use the logarithm expansion diffusion rate 2 (t)>~(lnt α ) λ Describe the mean square ...

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Abstract

The invention discloses a method for analyzing an ageing mechanism of dense colloid. The method comprises the steps of quantifying mean square displacement of microscopic motion of colloid particles in an ageing process of the dense colloid by extended logarithm diffusivity, calculating values of extended logarithm diffusivity parameters by combining a test condition and test data of ageing of the dense colloid, determining ageing extended logarithm diffusivity of the dense colloid, and microscopically analyzing the ageing mechanism of the dense colloid from an ultra-slow diffusion angle. The extended logarithm diffusivity comprises two parameters, namely an order of the extended logarithm diffusivity and a rate index, wherein the order of the extended logarithm diffusivity depicts a deviation degree from logarithm diffusivity in the ageing process of the dense colloid; the rate index describes a characteristic rate in the ageing process of the dense colloid; the extended logarithm diffusivity is popularization of the logarithm diffusivity; and the ageing process meeting the extended logarithm diffusivity is referred to as an extended logarithm ultra-slow ageing process. The method has a wide engineering application prospect, and can be used for production of high-performance polymer materials, development of drug carriers and the like.

Description

technical field [0001] The invention relates to a colloid, in particular to a method for analyzing the aging mechanism of the colloid. Background technique [0002] Colloids have been widely used in the fields of machinery, industry, and medicine. For example, adding solid colloid particles to polymers can improve the impact resistance and fracture strength of materials; the preparation of nanomaterials, the manufacturing process of plastics and rubber, etc. will be used Colloids; in medicine, magnetic substances are made into colloidal particles, which are used as drug carriers, and the drugs are delivered to the lesion under the action of a magnetic field. The aging of the colloid will directly affect the performance of the colloid and the role it plays in the use process. Therefore, clarifying the aging mechanism of the colloid is an important prerequisite for the correct and effective use of the colloid. [0003] The prior art shows that the microscopic motion of colloi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/00G01N2033/0077
Inventor 梁英杰陈文肖锐
Owner HOHAI UNIV
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