A preparation method of water-soluble nano-silver based on waste keratin degradation products

A technology of keratin degradation and nano silver, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, can solve problems such as low cost, achieve low cost, protect and prevent agglomeration, and reduce costs. Effect

Active Publication Date: 2015-11-18
DONGHUA UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can not only make nano-silver have better biocompatibility and lower cost, but also can solve the problem of reusing waste resources

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A preparation method of water-soluble nano-silver based on waste keratin degradation products
  • A preparation method of water-soluble nano-silver based on waste keratin degradation products
  • A preparation method of water-soluble nano-silver based on waste keratin degradation products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Wash the discarded white duck feathers with hot water at 40°C, add 0.7% sodium carbonate, 0.5% polyphosphate and 0.5% phosphorus-free standard detergent (ECE) to the water, and then clean them with distilled water; after drying, Crush the down to less than 500 mesh. Mix 1 g of pretreated down and 50 mL of distilled water in a reaction kettle, heat to 220 ° C, and keep warm for 60 min; filter to remove insoluble matter, put the keratin degradation solution in a dialysis bag with a cut-off size of 1000 Da, and use tap water and Distilled water is used for flow dialysis successively, and the dialysate outside the dialysis bag is scanned at full wavelength under ultraviolet light every 4 hours. After the difference between the two measured absorbance values ​​is less than 0.1, it is taken out to obtain a purified keratin polypeptide solution, which is then frozen. Dried to make keratin peptide powder. Depend on figure 1 with figure 2 It can be seen from the polarized li...

Embodiment 2

[0036] Wash the discarded down with hot water at 50°C, add 0.5% sodium carbonate, 0.3% polyphosphate and 0.3% phosphorus-free standard detergent (ECE) to the water, and then clean it with distilled water; after drying, put the down Crush to less than 500 mesh. Mix 1 g of pretreated down and 50 mL of distilled water in a reaction kettle, heat to 180 ° C, and keep warm for 90 min; filter to remove insoluble matter, put the keratin degradation solution in a dialysis bag with a cut-off size of 500 Da, and use tap water and Distilled water is used for flow dialysis successively, and the dialysate outside the dialysis bag is scanned at full wavelength under ultraviolet light every 6 hours. After the difference in absorbance between the two measurements is less than 0.1, it is taken out to obtain a purified keratin polypeptide solution, which is then frozen. Dried to make keratin peptide powder.

[0037] Dissolve 0.85g of silver nitrate in distilled water and set the volume to a 50m...

Embodiment 3

[0039] Wash the discarded white chicken feathers with hot water at 40°C, add 0.6% sodium carbonate, 0.4% polyphosphate and 0.4% phosphorus-free standard detergent (ECE) to the water, and then clean them with distilled water; Chicken feathers are crushed to less than 500 mesh. Mix 10 g of pretreated chicken feathers with 50 mL of distilled water in a reaction kettle, heat to 220 ° C, and keep warm for 90 min; filter and remove insoluble matter, put the keratin degradation solution in a dialysis bag with a cut-off size of 1000 Da, and mix with tap water and Distilled water is used for flow dialysis successively, and the dialysate outside the dialysis bag is scanned at full wavelength under ultraviolet light every 6 hours. After the difference in absorbance between the two measurements is less than 0.1, it is taken out to obtain a purified keratin polypeptide solution, which is then frozen. Dried to make keratin peptide powder.

[0040] Dissolve 0.85g of silver nitrate in distil...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a water-soluble nano silver preparation method based on waste keratin degradation products. The waste keratin degradation products are preprocessed, the waste keratin degradation products and distilled water are then put into a reaction kettle, and after thermal degradation is conducted on the waste keratin degradation products and the distilled water, a keratin solution is obtained; keratin polypeptide powder prepared after the keratin solution is purified and concentrated is used for preparing a keratin polypeptide aqueous solution, and the keratin polypeptide aqueous solution is mixed with a silver compound solution to prepare the water-soluble nano silver of different particle sizes under different temperature and pH value conditions. When the preparation method is compared with the prior art, the method that polypeptide chain sections obtained from the situation that the waste keratin materials are degraded through overheated water serve as a biological template to prepare nano materials is put forward for the first time. Water-soluble nano silver particles prepared through the method have good dispersity and good stability, and the particle sizes of the water-soluble nano silver particles can be controlled through changing of parameters; meanwhile, the whole process of the water-soluble nano silver particles is simple and easy to operate and capable of being directly applied to fields such as biological medicine because any chemical reagent and other hazardous substances do not participate in the preparation process.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and relates to a method for preparing water-soluble nano silver based on waste keratin degradation products. Background technique [0002] Nano silver is widely used in biomedicine, surface enhanced Raman, fluorescence enhancement, catalysis, non Linear optics, electronics, imaging and many other fields. At present, most of the methods for preparing water-soluble nano-silver are to select a single reducing agent to reduce or jointly reduce silver-containing compounds with multiple reducing agents in the presence of a stabilizer or a dispersant. Among them, commonly used reducing agents are sodium borohydride, citric acid, ascorbic acid, hydrazine hydrate, formaldehyde, polyols, hydrogen peroxide, etc., commonly used stabilizers or dispersants include polyvinylpyrrolidone, glucose, alkyl mercaptan, oleic acid Wait. Although the preparation of water-soluble nano-silver by the abo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F9/30B82Y40/00B82Y30/00
Inventor 阎克路张倩洁
Owner DONGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap