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Perfume-loaded nanoparticle with photothermal-responsive controlled-release ability and preparation method thereof

A nano-particle and responsive technology, which is applied in the direction of essential oil/fragrance, fat production, etc., can solve the problems of difficulty in volatilization, ineffectiveness, inconvenience, etc., to avoid loss, high loading efficiency, and high fragrance loading Effect

Active Publication Date: 2019-10-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are also some spices that are difficult to volatilize at room temperature due to their low saturated vapor pressure, so that they are inconvenient to use or fail to achieve the desired effect.

Method used

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  • Perfume-loaded nanoparticle with photothermal-responsive controlled-release ability and preparation method thereof
  • Perfume-loaded nanoparticle with photothermal-responsive controlled-release ability and preparation method thereof
  • Perfume-loaded nanoparticle with photothermal-responsive controlled-release ability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of embodiment 1 mesoporous silica nanoparticles (MSN)

[0028] Add 1.0g of cetyltrimethylammonium bromide (CTAB) into 480mL of water, then add 2.8mL of 2mol / L sodium hydroxide (NaOH) solution, stir at 80°C for 2h; add 5mL of silicic acid dropwise Tetraethyl ester (TEOS), stirred at 80°C, refluxed for 2h, filtered to obtain a white solid, fully washed with methanol and water, and dried. The dried white powder was placed in a muffle furnace and calcined at 550° C. for 5 h to remove the surfactant CTAB to obtain mesoporous silica nanoparticles (MSN).

Embodiment 2

[0029] The loading of embodiment 2 spices

[0030] Take 100 mg of the mesoporous silica nanoparticles (MSN) prepared in Example 1, add 5 g of 2 wt % sandalwood 210 (S210) ethanol solution, stir for 3 h, evaporate the ethanol under reduced pressure, and obtain fragrance-loaded silica Nanoparticles S210@MSN.

Embodiment 3

[0031] Coating of embodiment 3 PDA

[0032] Take 100mg of the above fragrance-loaded silica nanoparticles and disperse them in 50mL of Tris-HCl buffer solution with pH=8.5, add 25mg of dopamine hydrochloride, stir and react for 6h, centrifuge, wash with water once, and dry to obtain nano-fragrance S210@MSN / PDA.

[0033] Test Example 1 Infrared Spectrum Test

[0034] Infrared spectra of MSN, S210, S210@MSN, S210@MSN / PDA such as figure 2 shown. Appears at 1089, 801, 460cm in the infrared spectrum of MSN -1 The nearby absorption peaks correspond to the antisymmetric stretching vibration, symmetric stretching vibration, and bending vibration of Si-O-Si, respectively, proving the successful synthesis of silica. For the silica particles S210@MSN loaded with sandalwood 210, at 3036cm -1 The absorption peak at corresponds to the stretching vibration of =C-H in the sandalwood 210 molecule, 1382 and 1360cm -1 The two absorption peaks of comparable intensity at correspond to the ...

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Abstract

The invention discloses a perfume-loaded nanoparticle with photothermal-responsive controlled-release ability and a preparation method thereof. The preparation method comprises the following steps: 1,synthesizing a mesoporous silica nanocarrier; 2, loading perfume on the mesoporous silica nanocarrier; and 3, dispersing the perfume-loaded nanoparticle in an aqueous dopamine hydrochloride solution,and performing in-situ polymerization to obtain the polydopamine (PDA) coated composite nanoparticle. The perfume release rate of the perfume-loaded nanoparticle is controlled by light intensity andtime. In the absence of light, the release of the perfume is extremely slow; and when the perfume-loaded nanoparticle is exposed to light (such as sunlight), the release rate of the perfume is significantly accelerated. The invention provides a simple and feasible method for the application of hardly-volatile perfume, and the application scope of the hardly-volatile perfume and essential oil can be expanded by means of the good dispersibility and adhesive capacity of the nanocomposite.

Description

technical field [0001] The invention belongs to the field of perfume and its preparation, and in particular relates to a fragrance-carrying nano-particle with photothermal responsive controlled release capability and a preparation method thereof. Background technique [0002] Spices and essences are widely used in the fields of food, medicine, cosmetics, washing products and health products, and are closely related to the national economy and people's daily life. Most fragrances have high saturated vapor pressure and are easy to volatilize at room temperature; many of them contain reactive functional groups such as hydroxyl, aldehyde, and ketone groups, which are prone to chemical reactions and deterioration, shortening the shelf life of fragranced products. In addition, there are also some spices that are difficult to volatilize at room temperature due to their low saturated vapor pressure, so that they are inconvenient to use or fail to achieve the desired effect. Improvi...

Claims

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Application Information

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IPC IPC(8): C11B9/00
CPCC11B9/00C11B9/0015C11B9/0019
Inventor 江黎明
Owner ZHEJIANG UNIV
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