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PH value sensitive micro capsule as well as preparation method and application thereof

A kind of microcapsule and sensitive technology, applied in the directions of microcapsule preparation, microsphere preparation, etc., can solve the problem that the effect of indicating discoloration is difficult to maintain, and achieve the effect of rich pores, favorable for firm connection and stable structure

Active Publication Date: 2021-02-12
JINHUA JIELING HOUSE WARES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the invention is simple, convenient, and low in cost; it can be seen from the above technical scheme that the pH indicator dye is directly impregnated in the textile itself, and it is difficult to maintain the effect of indicating discoloration as it is used and cleaned.

Method used

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  • PH value sensitive micro capsule as well as preparation method and application thereof
  • PH value sensitive micro capsule as well as preparation method and application thereof
  • PH value sensitive micro capsule as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment discloses a preparation method of pH-sensitive microcapsules,

[0042] Include the following steps:

[0043] Step 1, mixing the pH-sensitive silica gel with primary pores coated with vegetable oil or glycerin layer with an emulsifier aqueous solution;

[0044] The emulsifier is sodium lauryl sulfate, and the mass of the emulsifier is 3% to 7% of the mass of the high molecular weight water-soluble prepolymer solution.

[0045] The preparation method of the pH sensitive silica gel comprises the following steps:

[0046] S1, preparation of silica hydrosol

[0047] Stir and mix ethyl orthosilicate, carnation safflower pigment, absolute ethanol and deionized water to obtain a yellow silica hydrosol;

[0048] S2, adjusting the pH value of the yellow silica hydrosol to 2;

[0049] S3, continuously add low molecular weight water-soluble prepolymer to the mixed solution of S2 under stirring condition, and react to obtain precipitation;

[0050] S4. The precipi...

Embodiment 2

[0068] The main difference between this embodiment and Example 1 is shown in Table 1. The pH value sensitive microcapsules prepared in this embodiment are made of textiles by the same method as in Example 1. The specific performance test is the same as in Example 1. The specific test The results are shown in Table 2 and Table 3 in detail.

Embodiment 3

[0070] The main difference between this embodiment and Example 1 is shown in Table 1. The pH value sensitive microcapsules prepared in this embodiment are made of textiles by the same method as in Example 1. The specific performance test is the same as in Example 1. The specific test The results are shown in Table 2 and Table 3 in detail.

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Abstract

The invention discloses a preparation method of a pH value sensitive micro capsule. The preparation method comprises the following steps: step 1, mixing pH value sensitive silica gel coated with an organic liquid layer and provided with a primary pore passage with an emulsifier aqueous solution; step 2, adding a high-molecular-weight water-soluble prepolymer containing urea and formaldehyde and alow-molecular-weight water-soluble prepolymer containing urea and formaldehyde into the mixed solution obtained in the step 1, and reacting at 45-55 DEG C for 2-3 hours to obtain micro capsules; step3, soaking the micro capsules prepared in the step 2 in ethanol, and dissolving low-molecular-weight urea-formaldehyde resin to form a secondary pore passage; and cleaning and drying the micro capsules with the composite holes to obtain a target product. The invention also discloses an application of the pH value sensitive micro capsule. The pH value sensitive micro capsule with a composite structure is prepared by matching the raw materials with the preparation process, and the pH value sensitive micro capsule is sensitive in pH color change and stable in structure; when being applied to textiles, the pH value sensitive micro capsule has an obvious indication effect on acidity, and meanwhile, the rubbing color fastness and the washing color fastness meet corresponding national standards.

Description

technical field [0001] The invention relates to the technical field of intelligent textiles, in particular to a pH sensitive microcapsule, a preparation method and an application. Background technique [0002] Living at home, we have to deal with textile products such as towels and bathroom floor mats every day. The acidic and humid environment is easy to breed bacteria. The application publication number is CN 103590263 A "A Preparation Method for pH Color-changing Fabric" invention patent. Use pH indicator dyes and distilled water to prepare dye solutions, and then accurately measure and dilute the required dye solutions to obtain dyeing baths; The bleached cotton fabric wetted in water is squeezed dry and immersed in the above dyeing bath to start dyeing; the cotton fabric is dyed with a constant temperature oscillator in a water bath, and the fabric is dyed at 40°C. After reaching 90°C, keep it warm for 30 minutes, and then lower it to room temperature; Washing, soaping...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 金淑兰丁琳吴浩时咏松罗军
Owner JINHUA JIELING HOUSE WARES CO LTD
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