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Preparation method of sulfydryl chitosan photochromic microcapsule and material prepared from sulfydryl chitosan photochromic microcapsule and application thereof

A technology of photochromism and chitosan, which is applied in the direction of microcapsule preparation, microsphere preparation, textile and paper making, etc., can solve the problem of formaldehyde release, and achieve the effect of easy operation, green preparation method and convenient operation

Active Publication Date: 2018-11-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the past, most of the wall materials used to coat photochromic dyes were synthetic polymers such as urea-formaldehyde resins, melamine resins, polyorganosiloxanes, polyurethanes, and aromatic polymers, but there were releases during the preparation of microcapsules. The problem with formaldehyde

Method used

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  • Preparation method of sulfydryl chitosan photochromic microcapsule and material prepared from sulfydryl chitosan photochromic microcapsule and application thereof
  • Preparation method of sulfydryl chitosan photochromic microcapsule and material prepared from sulfydryl chitosan photochromic microcapsule and application thereof
  • Preparation method of sulfydryl chitosan photochromic microcapsule and material prepared from sulfydryl chitosan photochromic microcapsule and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for applying thiol chitosan photochromic microcapsules to fabrics, the process is as follows:

[0037] The four substances of carbodiimide hydrochloride, N-hydroxysuccinimide, mercapto compound and N,N-dimethylformamide were mixed and stirred at a molar ratio of 1:1:1:0.5 for 12h. Chitosan with a degree of deacetylation of 70% was dissolved in a 1 mol / L hydrochloric acid solution to finally obtain a 2.5% chitosan hydrochloric acid solution. The chitosan hydrochloric acid solution was added to the mixed solution of the above four substances. The pH value was adjusted to 5.0 with sodium hydroxide solution, and the mixture was put into a dialysis bag for dialysis treatment after stirring for 12 hours, and finally freeze-dried to obtain thiol chitosan.

[0038] 0.05 g of thiol chitosan was dissolved in 20 mL of an acetic acid solution with a mass fraction of 1%, and stirred at room temperature until dissolved. Add 0.01 g of spiropyran photochromic dye to 10 mL of...

Embodiment 2

[0041] A method for applying thiol chitosan photochromic microcapsules to fabrics, the process is as follows:

[0042] The four substances of carbodiimide hydrochloride, N-hydroxysuccinimide, mercapto compound and N,N-dimethylformamide were mixed and stirred at a molar ratio of 1:1:1.25:0.7 for 12 hours. Chitosan with a degree of deacetylation of 85% was dissolved in a 1wt% acetic acid solution to finally obtain a 2% chitosan acetic acid solution. The chitosan acetic acid solution was added to the mixed solution of the above four substances. The pH value was adjusted to 5.0 with sodium hydroxide solution, and the mixture was put into a dialysis bag for dialysis treatment after stirring for 12 hours, and finally freeze-dried to obtain thiol chitosan.

[0043] 0.05 g of thiol chitosan was dissolved in 20 mL of a formic acid solution with a mass fraction of 2%, and stirred at room temperature until dissolved. Add 0.01 g of spirooxazine photochromic dye to 10 mL of a mixed emuls...

Embodiment 3

[0046] A method for applying thiol chitosan photochromic microcapsules to fabrics, the process is as follows:

[0047] The four substances of carbodiimide hydrochloride, N-hydroxysuccinimide, mercapto compound and N,N-dimethylformamide were mixed and stirred at a molar ratio of 1:1:1.2:0.75 for 12h. Chitosan with a degree of deacetylation of 90% was dissolved in a 5wt% citric acid solution to finally obtain a 4% chitosan citric acid solution. The chitosan citric acid solution was added to the mixed solution of the above four substances. The pH value was adjusted to 5.0 with sodium hydroxide solution, and the mixture was put into a dialysis bag for dialysis treatment after stirring for 12 hours, and finally freeze-dried to obtain thiol chitosan.

[0048] 0.05 g of thiol chitosan was dissolved in 20 mL of a citric acid solution with a mass fraction of 1%, and stirred at room temperature until dissolved. Add 0.01 g of diarylene photochromic dye to 10 mL of a mixed emulsifier so...

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Abstract

The invention discloses a preparation method of a sulfydryl chitosan photochromic microcapsule and a material prepared from the sulfydryl chitosan photochromic microcapsule and application thereof. According to the method, first chitosan is modified with sulfydryl, a photochromic dye is coated with the sulfydryl-modified chitosan as a wall material by an emulsification-chemical crosslinking methodto obtain the photochromic microcapsule with excellent thermal stability and photo fatigue resistance. In application, the photochromic microcapsule is bonded to fabrics woven by protein fibers suchas wool and silk by a dipping-rolling method, thus giving the fabric photochromic properties. Compared with the existing technology, the preparation method is simple and easy to operate, toxic gases are released in the whole preparation process, and the preparation method is green, and environmental friendly, conforms to the concept of sustainable development, has no special requirements for equipment, can carry out large-scale production, and has good and broad application prospects.

Description

technical field [0001] The invention relates to a preparation method of a thiol chitosan photochromic microcapsule, the obtained material and application thereof, and belongs to the technical field of photochromic materials. Background technique [0002] Photochromic dyes are a new type of dyes that are very actively researched at present, but a large number of studies have shown that they are susceptible to external environmental factors and chemical additives, resulting in reduced fatigue resistance, poor light resistance stability, and easy to form irreversible decomposition products. Disadvantages such as loss of discoloration effect, which limit its application. Through the microcapsule technology, an environmentally friendly wall material is selected to coat the photochromic dye, which can not only retain the reversible photochromic properties of the dye, but also avoid the photochromic properties of the dye from being affected. [0003] In the previous research, Zhou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C08B37/08D06M23/12D06M15/03D06M101/10D06M101/12
CPCB01J13/14D06M15/03D06M23/12C08B37/003D06M2101/10D06M2101/12
Inventor 殷允杰张妍妍王腾飞王潮霞陈坤林
Owner JIANGNAN UNIV
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