Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of cellulose/nano cerium oxide composite membrane

A technology of nano-cerium oxide and cellulose film, which is applied in the field of preparation of cellulose/nano-cerium oxide composite film, to achieve the effect of simple and feasible preparation, good transparency and easy operation

Inactive Publication Date: 2017-12-26
JIANGNAN UNIV
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current research on ceria involves the preparation method, process, and application performance of nano-ceria, but there are few reports on the application of nano-cerium oxide to polymers.
[0005] In particular, the research and application of functional composite membranes prepared by combining nano-cerium dioxide and cellulose by in-situ preparation methods have not been reported.

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 cellulose/nano cerium oxide composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of cellulose film: disperse the cotton linters in the alkaline solution, freeze the resulting cellulose suspension at low temperature, take it out after 24 hours, stir it with high-speed machinery, and centrifuge. The cellulose solution obtained by this simple method is placed in a glass Push the plate to make a thin layer, then immerse in concentrated sulfuric acid solution to solidify and regenerate to obtain a transparent cellulose film, and the cellulose film is repeatedly washed with deionized water and freeze-dried for later use;

[0024] (2) Soak the cellulose membrane in Ce at a concentration of 0.8mol / L at room temperature 3+ solution for 10 h, followed by repeated washing with deionized water to remove unadsorbed Ce 3+ ion;

[0025] (4) Then at room temperature, the cellulose film is immersed in a NaOH solution with a concentration of 10mol / L to react;

[0026] (5) The cellulose membrane obtained by the reaction is taken out, rinsed repeatedl...

Embodiment 2

[0029] (1) Preparation of cellulose film: Add bacterial cellulose to 200mL LiCl / DMAc dissolution system at room temperature, then heat and stir in an oil bath, react for a period of time, and then cool at room temperature. After the bacterial cellulose is completely dissolved, the air bubbles are removed by centrifugation, the obtained bacterial cellulose solution is cast in a mold, left at room temperature for 24 hours to form a film, and the obtained bacterial cellulose film is washed with deionized water and freeze-dried;

[0030] (2) Soak the cellulose membrane in Ce at a concentration of 0.5mol / L at room temperature 3+ 10h in the solution;

[0031] (3) Then wash repeatedly with deionized water to remove unadsorbed Ce 3+ ion;

[0032] (4) Then at room temperature, the cellulose film is immersed in a NaOH solution with a concentration of 10mol / L to react;

[0033] (5) The cellulose membrane obtained by the reaction is taken out, rinsed repeatedly with deionized water, an...

Embodiment 3

[0036] (1) Preparation of cellulose film: disperse the cotton linters in the alkaline solution, freeze the resulting cellulose suspension at low temperature, take it out after 24 hours, stir it with high-speed machinery, and centrifuge. The cellulose solution obtained by this simple method is placed in a glass Push the plate to make a thin layer, then immerse in concentrated sulfuric acid solution to solidify and regenerate to obtain a transparent cellulose film, and the cellulose film is repeatedly washed with deionized water and freeze-dried for later use;

[0037] (2) Soak the cellulose membrane in Ce at a concentration of 0.5mol / L at room temperature 3+ 10h in the solution;

[0038] (3) Then wash repeatedly with deionized water to remove unadsorbed Ce 3+ ion;

[0039] (4) Then at room temperature, the cellulose film is immersed in an ammonia solution with a concentration of 20mol / L to react;

[0040] (5) The cellulose membrane obtained by the reaction is taken out, rins...

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

No PUM Login to View More

Abstract

The invention relates to a preparation method of a cellulose / nano cerium oxide composite membrane. The preparation method is characterized in the following steps: by an in situ generation method, adsorbing a precursor solution containing Ce<3+> by using a porous structure of a cellulose membrane, and removing non-adsorbed Ce<3+> ions; immersing into 5 to 20mol / L alkali liquor for reaction, cleaning the cellulose membrane loading nano particles of Ce(OH)3, and adjusting a pH value to 6 to 7; air-drying the cellulose membrane under room temperature, and drying for a period greater than or equal to 6h under a temperature greater than or equal to 40 DEG C, thus preparing the cellulose / nano cerium oxide composite membrane. The mass fraction of nano cerium oxide in the composite membrane is 0.5 to 0.6 percent by weight; the obtained composite membrane has ultraviolet light transmissivity lower than 1 percent at a 300nm place, and visible light transmissivity greater than 70 percent at a 500nm. The method is simple and feasible, and is easy to operate. The prepared composite membrane can be widely applied to fields such as product packages and ultraviolet-resistant transparent films.

Description

technical field [0001] The invention relates to a preparation method of a cellulose / nano cerium oxide composite membrane, which belongs to the technical field of polymer-based functional composite materials. Background technique [0002] Advances in cellulose dissolution technology and nano-cellulose preparation technology enable difficult-to-melt cellulose to be processed into various cellulose-based materials such as fibers, films, hydrogels, aerogels, and microspheres in the form of solutions and suspensions . Among them, cellulose membrane has attracted much attention due to its advantages of high mechanical strength, high modulus, good transparency, unique porous structure, controllability of porosity and pore size, and simple preparation method. In order to improve the cost performance of the cellulose membrane, chemically modify or physically modify it, especially using the porous structure of the cellulose membrane as a carrier, and compounding with functional nanop...

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): C08J7/12C08L1/02
CPCC08J7/12C08J2301/02
Inventor 王玮张佰开梁涛
Owner JIANGNAN UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com