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A method for analyzing the aging mechanism of dense colloids

A kind of aging mechanism and colloidal technology, which is applied in the direction of analyzing materials, instruments, measuring devices, etc., can solve the problems that cannot 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: 2019-07-30
HOHAI UNIV
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  • Description
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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

Method used

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  • A method for analyzing the aging mechanism of dense colloids
  • A method for analyzing the aging mechanism of dense colloids
  • A method for analyzing the aging mechanism of dense colloids

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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 the aging mechanism of dense colloids. The expanded logarithmic diffusivity is used to quantify the mean square displacement of the microscopic movement of colloid particles during the aging process of dense colloids. Then, the expansion is calculated based on the test conditions and test data of dense colloid aging. The value of the logarithmic diffusivity parameter ultimately determines the expanded logarithmic diffusivity of the aging of the dense colloid, and microscopically analyzes the aging mechanism of the dense colloid from the perspective of extra-slow diffusion. The extended logarithmic diffusivity of the present invention includes two parameters, the order of the extended logarithmic diffusivity and the rate index. The order of the extended logarithmic diffusivity describes the degree to which the aging process of dense colloid deviates from the logarithmic diffusivity, and the rate index describes the characteristic rate of the aging process of dense colloid. The extended logarithmic diffusivity is a generalization of the logarithmic diffusivity, and the aging process that satisfies the extended logarithmic diffusivity is called the extended logarithmic extra-slow aging process. This invention has broad engineering application prospects and can be used in the production of high-performance polymer materials, the development of drug carriers, etc.

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 Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/00G01N33/0077
Inventor 梁英杰陈文肖锐
Owner HOHAI UNIV
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