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Core-shell polyphenol surface finish collagen polypeptide nanospheres and preparation method thereof

A technology of collagen polypeptide and surface modification, which is applied in the field of tanning waste-collagen reuse, can solve the problems of small adsorption capacity of heavy metal ions, limited wide application, difficult regeneration, etc., and achieves good application prospects, high promotion value, and easy The effect of promotion

Inactive Publication Date: 2015-12-23
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon is a commonly used adsorbent. Commercial activated carbon mainly includes granular activated carbon and powdered activated carbon. Due to its high price, its wide application is limited.
Although activated carbon can adsorb many chemical substances, its small adsorption capacity for heavy metal ions and difficult regeneration limit its further utilization.

Method used

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  • Core-shell polyphenol surface finish collagen polypeptide nanospheres and preparation method thereof
  • Core-shell polyphenol surface finish collagen polypeptide nanospheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1. Disperse 10.0 mg of collagen polypeptide nanospheres in 150 mL of distilled water, place on a magnetic stirrer, adjust the pH of the system to 5, slowly add 5 mg of catechol, stir for 5 hours at 25°C, and then raise the temperature to 40°C and stir for reaction 2h, centrifuge and separate to obtain solid particles; the stirring speed of the stirring reaction is 300r / min;

[0034] Step 2: Take 10.0 mg of solid particles and disperse them in 150 ml of distilled water, place them on a magnetic stirrer, add 0.3 mg of fatty alcohol polyoxyethylene ether-1, 1.0 mg of formaldehyde, stir and react at 25°C for 3 hours, heat up to 40°C and stir React for 2 hours, add 1mol.L -1 Adjust the pH to 6 with the HCl solution, let stand for 2 hours, centrifuge, and vacuum-dry at 50° C. to obtain core-shell polyphenol surface-modified collagen polypeptide nanospheres; the stirring speed of the stirring reaction is 300 r / min.

Embodiment 2

[0036] Step 1. Disperse 10.0 mg of collagen polypeptide nanospheres in 150 mL of distilled water, place on a magnetic stirrer, adjust the pH of the system to 5, slowly add 8 mg of catechin, stir for 5 hours at 25°C, and heat up to 40°C for 2 hours. , centrifuged and separated to obtain solid particles; the stirring speed of the stirring reaction is 500r / min.

[0037] Step 2: Take 10.0 mg of solid particles and disperse them in 150 mL of distilled water, place them on a magnetic stirrer, add 0.3 mg of fatty alcohol polyoxyethylene ether-2, 1.5 mg of glutaraldehyde, stir and react at 25°C for 3 hours, and heat up to 40°C °C and stirred for 2 hours, added 1mol.L -1 Adjust the pH of the HCl solution to 6, let it stand for 2 hours, centrifuge, and vacuum-dry at 50°C to obtain core-shell polyphenol surface-modified collagen polypeptide nanospheres; the stirring speed of the stirring reaction is 500r / min.

Embodiment 3

[0039] Step 1. Disperse 10.0 mg of collagen polypeptide nanospheres in 150 mL of distilled water, place on a magnetic stirrer, adjust the pH of the system to 5, slowly add 3 mg of bayberry extract, stir for 5 hours at 25°C, and heat up to 40°C for 2 hours. , centrifugation and separation; solid particles are obtained; the stirring speed of the stirring reaction is 400r / min.

[0040] Step 2: Take 10.0 mg of solid particles and disperse them in 150 mL of distilled water, place them on a magnetic stirrer, add 0.3 mg of fatty alcohol polyoxyethylene ether-S, 0.5 mg of epoxy resin, stir and react at 25°C for 3 hours, and heat up to 40°C °C and stirred for 2 hours, added 1mol.L -1 Adjust the pH to 6 with the HCl solution, let stand for 2 hours, centrifuge, and vacuum-dry at 50° C. to obtain core-shell polyphenol surface-modified collagen polypeptide nanospheres; the stirring speed of the stirring reaction is 400 r / min.

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Abstract

The invention discloses a preparation method of core-shell polyphenol surface finish collagen polypeptide nanospheres. The preparation method comprises the following steps: taking and dispersing collagen polypeptide nanospheres in distilled water, regulating the pH of a system to be 4-7 while stirring, then adding a polyphenol substance, stirring for reaction, centrifuging and separating to obtain solid microspheres; taking and dispersing the solid microspheres in distilled water, stirring, and adding a penetrant and a cross-linking agent, stirring for reaction, adding a fixing agent, adjusting the pH to 5-8, standing, centrifuging, and separating to obtain a solid, and drying the solid in vacuum to obtain the core-shell polyphenol surface finish collagen polypeptide nanospheres. According to a tanning chemical principle, the surfaces of the collagen polypeptide nanospheres are coated with the layer of the polyphenol substance to enhance the content of active functional groups, and particularly the adsorption processing capacity of a polyhydroxy structure having higher complexing power for heavy metal ions is enhanced, and a production process is simple, high in operability and easy to generalize, and an obtained product has higher promotional value and has a well application prospect.

Description

technical field [0001] The invention relates to a method for modifying the surface of collagen polypeptide nanospheres with polyphenols to obtain a core-shell structure, and belongs to the technical field of tanning waste-collagen reuse. Background technique [0002] Due to the quantum size effect, small size effect, surface effect and macroscopic quantum tunneling effect, and the lack of adjacent atoms around the surface atoms, nanomaterials are highly unsaturated, and are easy to combine with other metal ions in an electrostatic way. It tends to be stable and can interact strongly with surrounding substances. At present, the most widely used nanomaterial adsorbents at home and abroad mainly include the following categories: metal oxides, fullerenes, carbon nanotubes, and organic nanomaterials. Wang Xiangke's research group at the Institute of Plasma Physics, Chinese Academy of Sciences applied carbon nanotubes to nuclear waste liquid treatment for the first time, and foun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J20/26B01J20/30C07K14/78C07K1/107
Inventor 周建苏林竹文坤张红平罗学刚
Owner SOUTHWEAT UNIV OF SCI & TECH
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