Preparation for silk with quantum dot nano-particles

A technology of nanoparticles and quantum dots, applied in the field of preparation of fluorescent silk, can solve the problems of high cost, low efficiency and fast photobleaching rate of fluorescent silk, and achieve the effect of good repeatability and low cost of product properties.

Inactive Publication Date: 2008-10-01
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technology to be solved by the present invention is to overcome the disadvantages of low fluorescent brightness and fast photobleaching rate of fluorescent silk obtained by combining organic fluorescent dyes on silk, and to overcome the defects of high cost and low efficiency of fluorescent silk obtained by transgenic methods. A method for preparing fluorescent silk assembled with quantum dot nanoparticles, combining semiconductor fluorescent quantum dots on silk to obtain novel fluorescent silk with various fluorescent colors and high fluorescent brightness and stability

Method used

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  • Preparation for silk with quantum dot nano-particles
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  • Preparation for silk with quantum dot nano-particles

Examples

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Effect test

Embodiment 1

[0031] Soak silkworm cocoons in 90°C NaHCO containing 0.6 wt% 3 In hot water solution to remove sericin and impurities on the surface of silk, weigh 30-35mg of dried degummed silk, soak in 5ml containing about 0.8mg·ml -1 In the polydimethyldiallyl ammonium chloride aqueous solution, the negatively charged silk will absorb the positively charged polydimethyldiallyl ammonium chloride, take out the silk after about 30min, wash it with water for several times, and then remove the silk Soak in 5ml of surface-modified small molecule mercaptopropionic acid quantum dot aqueous solution, the negatively charged quantum dots will be adsorbed to the positively charged polydimethyldiallylammonium chloride on the silk surface, after about 1 hour, take out the silk and Wash several times with water, and then soak in polydimethyldiallyl ammonium chloride aqueous solution, so repeatedly alternately soak in polydimethyldiallyl ammonium chloride aqueous solution and quantum dot aqueous solution...

Embodiment 2

[0036] Dihydrolipoic acid (DHLA) reacts with polyethylene glycol (PEG) to obtain a thiolated polymer (DHLA-PEG), and the DHLA-PEG is coated on the red fluorescent quantum dot CdTe / CdSe through the thiol group on the polymer , to make quantum dots coated with organic polymers, by the same method as in Example 1, the quantum dots are adsorbed on silk, in this example, soaked in polydimethyldiallyl chloride for 2 times In the ammonium aqueous solution, once soaked in the quantum dots, the silk adsorbed with the quantum dots was blotted dry with filter paper, and then dried naturally in the dark, that is, the fluorescent silk coated with the quantum dots was obtained once, and the silk with strong red fluorescence was obtained. .

Embodiment 3

[0038] Cut the cocoon layer of tussah silkworm into pieces and soak in 90°C NaHCO containing 0.6wt% 3 In the hot water solution, to remove sericin and impurities on the surface of the silk, and then in the same way as in Example 1, the red fluorescent CdTe quantum dots coated with mercaptopropionic acid were adsorbed onto the silk. In this example, soak in polydimethyldiallyl ammonium chloride aqueous solution for two times, and soak in quantum dots for one time. After absorbing the quantum dots, the silk absorbs the aqueous solution with filter paper, and then dries naturally in the dark. , that is, the fluorescent silk coated with quantum dots was obtained once, and the silk with strong fluorescence was also obtained as a result.

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Abstract

A preparing method of fluorescent cocoon fibre assembled with quantum point nano particles, takes the quantum point nano particles as fluorescent particles, takes cocoon fibre as nuclear, adopts an electrostatic absorption method to connect one layer of organic high molecule on the cocoon fibre surface, and then adopts an electrostatic absorption method to connect one layer of quantum point nano particles on the organic high molecule surface, or alternately repeats steps for multitime, and then uses an electrostatic absorption method to connect one layer of organic high molecule on the quantum point nano particles surface, so as to compose a fluorescent cocoon fibre coated by quantum point nano particles once or many times, wherein, the quantum point nano particles surface is coated by organic small molecule and/or organic high molecule. The invention has advantages that the inventive fluorescent cocoon fibre assembled with quantum point nano particle, not only has large superiority in optical aspects such as fluorescent stability, fluorescent strength and fluorescent color kinds, but also can produce in large under low cost conditions with better product character repetitiveness.

Description

technical field [0001] The invention relates to a method for preparing fluorescent silk, in particular to a method for preparing fluorescent silk assembled with quantum dot nanoparticles, and belongs to the field of material technology. Background technique [0002] Silk is a kind of natural protein fiber coagulated by the silk liquid secreted by the silk gland in the silkworm body, mainly composed of silk fibroin and sericin on the surface. The production of silk has a history of thousands of years in our country, and silk satins woven from silk have long enjoyed a good reputation at home and abroad, and are an important part of our splendid civilization. [0003] Silk has beautiful and elegant luster, soft feel, good moisture absorption, air permeability and warmth retention, as well as excellent mechanical properties and biocompatibility. These superior properties are beyond the reach of artificial fiber materials. They are widely used in textiles and biomedicine. field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/356D06M11/52D06M15/53D06M11/79D06M15/59D06M101/10
Inventor 储茂泉
Owner TONGJI UNIV
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