Photoresponsive slow-release polymer nano spice and preparation method thereof

A polymer and light-responsive technology, which is applied in the direction of essential oil/fragrance, fat production, etc., can solve the problems of poor long-lasting fragrance and uncontrollable fragrance release process, and achieve high loading rate, slow fragrance retention time, and uniform fragrance release Effect

Active Publication Date: 2018-09-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

An important reason for the poor long-lasting performance of spices is the uncontrollable release process of spices. Therefore, precise and controllable release of spices is required to solve the existing technical problems

Method used

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  • Photoresponsive slow-release polymer nano spice and preparation method thereof
  • Photoresponsive slow-release polymer nano spice and preparation method thereof
  • Photoresponsive slow-release polymer nano spice and preparation method thereof

Examples

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preparation example Construction

[0027] The invention discloses a light-responsive slow-release polymer nano spice and a preparation method thereof. The preparation method comprises the following steps: synthesizing a reversible addition-fragmentation chain transfer polymer chain transfer agent modified by a hydrophilic polymer; synthesizing a hydrophobic Sexual photosensitizer monomer; preparation of photosensitive amphiphilic block copolymer; photosensitive amphiphilic block copolymer loaded with fragrance. The invention adopts the photosensitive amphiphilic block copolymer to entrap the fragrance and prepares the light-responsive slow-release fragrance, which solves the problems of instability and volatilization of the fragrance and uncontrollable fragrance release process.

[0028] Specifically, the invention discloses a method for preparing a light-responsive slow-release polymer nano spice, comprising the following steps:

[0029] (1) modifying the reversible addition-fragmentation chain transfer polyme...

Embodiment 1

[0047] In this example, the light-responsive slow-release polymer nano-perfume is prepared by the following method, which specifically includes the following steps:

[0048] (1) Synthesis of reversible addition-fragmentation chain transfer polymeric chain transfer agent modified by hydrophilic polymer

[0049] 4-cyano-4-(dodecylsulfanylthiocarbonyl)sulfanylvaleric acid (100mg), distearoylphosphatidylethanolamine-polyethylene glycol 2000 (412.85mg), 1-ethyl -(3-Dimethylaminopropyl)carbodiimide hydrochloride (56.98 mg), N-hydroxysuccinimide (34.21 mg) and N,N-diisopropylethylamine (123 μL) were dissolved In N, N-dimethylformamide, stirred overnight at room temperature; dialyzed with a dialysis bag with a molecular weight of 2000, the dialysate was N, N-dimethylformamide, dialyzed for 24 hours, then dialyzed with deionized water for 48 hours, and then Freeze-dry to obtain the product hydrophilic polymer modified reversible addition-fragmentation chain transfer polymer chain tran...

Embodiment 2

[0059] In this example, the light-responsive slow-release polymer nano-perfume is prepared by the following method, which specifically includes the following steps:

[0060] (1) Synthesis of reversible addition-fragmentation chain transfer polymeric chain transfer agent modified by hydrophilic polymer

[0061] 4-cyano-4-(dodecylsulfanylthiocarbonyl)sulfanylvaleric acid (100mg), distearoylphosphatidylethanolamine-polyethylene glycol 2000 (412.85mg), 1-ethyl -(3-Dimethylaminopropyl)carbodiimide hydrochloride (56.98 mg), N-hydroxysuccinimide (34.21 mg) and N,N-diisopropylethylamine (123 μL) were dissolved In N, N-dimethylformamide, stirred overnight at room temperature; dialyzed with a dialysis bag with a molecular weight of 2000, the dialysate was N, N-dimethylformamide, dialyzed for 24 hours, then dialyzed with deionized water for 48 hours, and then Freeze-dry to obtain the product hydrophilic polymer modified reversible addition-fragmentation chain transfer polymer chain tran...

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Abstract

The invention discloses a photoresponsive slow-release polymer nano spice and a preparation method thereof. The preparation method comprises the following steps: a reversible addition-fragmentation chain transfer polymerization chain transfer agent modified by a hydrophilic polymer is synthesized; a hydrophobic photosensitizer monomer is synthesized; a photosensitive amphiphilic block copolymer isprepared; and the photosensitive amphiphilic block copolymer supported spice is prepared. The method disclosed by the invention adopts the photosensitive amphiphilic block copolymer to encapsulate aspice and prepare the photoresponsive slow-release spice, thereby solving the problems that the spice is unstable and easy to volatilize and the release process of the spice is uncontrollable.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a light-responsive slow-release polymer nano fragrance and a preparation method thereof. Background technique [0002] With the progress of social civilization and the improvement of people's quality of life, the fragrant smell is gradually praised by people. Spices have been widely used in cosmetic silk, leather and wallpaper and other fields. However, spices are mainly volatile small molecular compounds with unstable and volatile components. An important reason for the poor long-acting effect of the fragrance is the uncontrollable release process of the fragrance. Therefore, precise and controllable release of the fragrance is required to solve the existing technical problems. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the main purpose of the present invention is to provide a light-responsive slow-release polymer nano-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/00C08F293/00
CPCC08F293/005C08F2438/03C11B9/00
Inventor 张欣张田露卢治国
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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