Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preparation method of ramie bone cellulose nanocrystalline self-assembled structural color thin film

A technology of ramie bone and cellulose, which is applied in the field of preparation of ramie bone cellulose nanocrystalline self-assembled structural color film, can solve the problems of complicated process steps and the inability to control the size of cellulose nanocrystals, and solve the problem of environmental pollution , Improve the value of comprehensive utilization and the effect of rich resources

Active Publication Date: 2017-02-08
嘉兴慧泉生物科技有限公司
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, pretreatment, biochemical treatment, mechanical pulverization, dimethyl sulfoxide treatment, pyrrole oxidation treatment, centrifugation, precipitation and dispersion treatment, freeze-drying and other steps are generally required to obtain cellulose nanocrystal whiskers when preparing cellulose nanocrystals. , the process steps are very complicated, and it is impossible to control the size of cellulose nanocrystals

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
  • Preparation method of ramie bone cellulose nanocrystalline self-assembled structural color thin film
  • Preparation method of ramie bone cellulose nanocrystalline self-assembled structural color thin film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The invention provides a method for preparing a ramie bone cellulose nanocrystalline self-assembled structural color film, comprising the following steps:

[0032] (1) mixing ramie bone cellulose with sulfuric acid, carrying out a hydrolysis reaction, to obtain a reaction solution containing ramie bone nanocrystalline cellulose;

[0033] (2) the reaction solution obtained in the step (1) is subjected to centrifugation and dialysis to obtain ramie bone nanocrystalline cellulose suspension;

[0034] (3) The solvent in the ramie bone nanocrystalline cellulose suspension obtained in the step (2) is removed to obtain the ramie bone cellulose nanocrystalline self-assembled structural color film.

[0035] Ramie bone cellulose in the present invention preferably obtains through the following steps:

[0036] Mixing ramie bone meal with water and performing steam explosion treatment;

[0037] mixing the treated ramie bone powder with sodium hydroxide, and cooking to obtain rami...

Embodiment 1

[0053] Take 100g of ramie bone powder, add 500mL of distilled water, and steam explosion at 121°C for 20min. Take 50g of pretreated ramie bone meal, add 1500mL of 10% NaOH solution, cook at 75°C for 6h, let it stand for 12h, filter with suction, soak the filter residue in 200mL distilled water for 2h, filter, repeat the operation 3 times, and dry the filter residue dry to obtain ramie bone crude cellulose; take 30g ramie bone crude cellulose, add 750mL 5% H in a water bath at 55°C 2 o 2 React for 8 hours, then filter, rinse the filter residue with distilled water three times, and dry the obtained ramie bone cellulose.

Embodiment 2

[0055] Take 2.0 g of the ramie bone cellulose prepared in Example 1, add 20 mL of 68% sulfuric acid, and react with magnetic stirring at 55° C. for 35 minutes. The stirring speed is controlled at 700 rpm. Treat for 10 minutes, remove the supernatant, wash the precipitate with an equal amount of distilled water, repeat the above centrifugation and washing operations 5 times, transfer the obtained suspension to a dialysis bag for dialysis, and end the dialysis when the pH of the dialysate is 7 to obtain nanocrystals For the cellulose suspension, take the above-mentioned cellulose suspension and place it in a plate, and evaporate the solvent at room temperature to obtain a ramie bone cellulose nanocrystalline self-assembled structural color film.

[0056] Using a transmission electron microscope to detect the size of the nanocrystalline cellulose, the size of the nanocrystalline cellulose can be obtained as 5±0.4nm×180±6nm (diameter×length);

[0057] Using a polarizing microscope...

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
Grinding finenessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a ramie bone cellulose nanocrystalline self-assembled structural color thin film. The preparation method comprises the following steps: firstly, mixing ramie bone meal with water, and performing steam-explosion treatment; secondly, mixing the pretreated ramie bone meal with a sodium hydroxide solution and cooking to obtain ramie bone coarse cellulose; mixing the ramie bone coarse cellulose with hydrogen peroxide; performing oxidizing reaction under the condition of ice bath to obtain ramie bone cellulose; mixing the ramie bone cellulose with a sulfuric acid solution and hydrolyzing to obtain a reaction solution containing ramie bone cellulose nanocrystalline; centrifuging and dialyzing the reaction solution to obtain a purified nanocrystalline cellulose suspension; removing solvent in the suspension to obtain a self-assembled nanocrystalline cellulose thin film. The preparation method disclosed by the invention is simple; in addition, the size of the cellulose nanocrystalline is controllable; the obtained cellulose nanocrystalline thin film can be applied to the field of biomedical and polymer materials.

Description

technical field [0001] The invention relates to the technical field of cellulose films, in particular to a method for preparing a ramie bone cellulose nanocrystal self-assembled structural color film. Background technique [0002] Cellulose is a renewable organic polymer that widely exists in nature. It has the advantages of non-toxicity, environmental friendliness, easy modification and low density. The unique properties of cellulose make it have great potential application value. Nanocrystalline cellulose is a product obtained by acid hydrolysis of cellulose. This material has attracted much attention because of its unique self-assembled optical properties. Through water volatilization, the chiral nematic phase self-assembled ordered structure of nanocrystalline cellulose in water can be well preserved in the final translucent cellulose solid film. This translucent cellulose solid film with an ordered structure usually selectively reflects a certain wavelength of visible ...

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
IPC IPC(8): C08J5/18C08L1/04C08B15/02
CPCC08B15/02C08J5/18C08J2301/04C08L2203/02C08L2203/16
Inventor 崔永明李意乔路蔡映杰陈洪高王军
Owner 嘉兴慧泉生物科技有限公司
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com