Method for detecting coating rate of microcapsule core material

A detection method, microcapsule technology, applied in the direction of color/spectral characteristic measurement, to achieve the effect of overcoming inaccurate detection data, stable test results, and good repeatability of precision

Inactive Publication Date: 2013-06-19
GOLD HONG YE PAPER
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for detecting the coating rate of the microcapsule core material. The method evaluates the coating rate of the microcapsule core material by detecting oil red, and accurately reflects whether the core material is coated or not coated. effectively overcome the problem of inaccurate detection data caused by volatilization in the production process of volatile oily core materials

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  • Method for detecting coating rate of microcapsule core material

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Embodiment 1-3

[0021] Embodiment 1-3: a kind of detection method of microcapsule core material coating rate,

[0022] step one. The core material system is obtained by uniformly blending the oil red with the oily core material, wherein the mass ratio between the oil red and the oily core material is as shown in Table 1:

[0023] Table 1

[0024] oil red Oily core material Example 1 0.005 1 Example 2 0.0063 1 Example 3 0.007 1

[0025] Annotate embodiment 1-3 oily core material is: embodiment 1 is peppermint essence, embodiment 2 is eucalyptus oil essence, embodiment 3 is DEET;

[0026] Step two. Adding the core material system in step 1 to the aqueous solution in which the wall material is dissolved, and going through a series of coating processes to form a microcapsule emulsion, the microcapsules are composed of the core material system and the wall material coated on the surface of the core material system, The wall material composition of descri...

Embodiment 4-6

[0033] Embodiment 4-6: A kind of detection method of microcapsule core material coating rate

[0034] step one. The oil red and the oily core material are uniformly blended to obtain a core material system, wherein the mass ratio between the oil red and the oily core material is as shown in Table 2:

[0035] Table 2

[0036] oil red Oily core material Example 4 0.005 1 Example 5 0.0063 1 Example 6 0.007 1

[0037] Step two. Adding the core material system in step 1 to the aqueous solution in which the wall material is dissolved, and going through a series of coating processes to form a microcapsule emulsion, the microcapsules are composed of the core material system and the wall material coated on the surface of the core material system, The wall material composition of described embodiment 1-3 is: embodiment 1 is gelatin, embodiment 2 is gum arabic, embodiment 3 is the mixture of gelatin and arabic gum;

[0038] Step three. adding ...

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Abstract

The invention provides a method for detecting the coating rate of a microcapsule core material. The method comprises the following steps: 1, uniformly mixing oil red with an oily core material to obtain a core material system; 2, adding the core material system obtained in step 1 to an aqueous solution dissolved with a shell material, and carrying out a series of coating processes to form a microcapsule emulsion, wherein the microcapsule comprises the core material system and the shell material coated on the surface of the core material system; 3, adding the microcapsule emulsion obtained in step 2 to a pure ethanol solvent to obtain a mixed solution, and carrying out centrifuge separation on the mixed solution; 4, taking the supernatant of the mixed solution obtained in step 3, and determining the absorbance of the oil red in the supernatant at 517nm; and 5, obtaining the mass of the oil red in the supernatant through calculating according to the absorbance obtained in step 4 and a standard curve, and obtaining the coating rate through calculating according to the mass of the oil red in the supernatant. By detecting the oil red to evaluate the coating rate of the microcapsule core material in the invention, the core material coating and uncoating status is accurately reflected, and a problem of the inaccurate detection datum caused by the volatilization of volatile oily core materials in the making process is effectively overcome.

Description

technical field [0001] The invention relates to a method for detecting microcapsules, in particular to a method for detecting the coverage rate of a microcapsule core material. Background technique [0002] The present invention develops a method that can directly test the coverage rate of microcapsules. There are two types of methods for measuring the coverage of microcapsules in the past: one is to calculate the coverage by thermogravimetric analysis after the microcapsule solution is separated and dried, and there are many intermediate processing steps, which is an indirect test with loss of accuracy; One type of test method is to use the core material itself to absorb light, measure the residual amount of the microcapsule outer core material, and calculate the coverage rate, this method is not suitable for volatile core materials, and multi-component core materials cannot The cladding ratio was inferred from the variation of single core material components. In the pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
Inventor 孟凡翠周建英蒋静陈善梁
Owner GOLD HONG YE PAPER
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