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 polyme

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

Example Embodiment

[0022] Implementation example 1

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

[0024] (2) Soak the cellulose membrane in Ce with a concentration of 0.8mol / L at room temperature 3+ In the solution for 10 hours, then repeatedly washed with deionized water to remove the unadsorbed Ce 3+ ion;

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

[0026] (5) Take out the cellulose membrane obtained by the r...

Example Embodiment

[0028] Example 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, and cool at room temperature after a period of reaction. After the bacterial cellulose is completely dissolved, the bubbles are removed by centrifugation, the obtained bacterial cellulose solution is cast in a mold, and the film is left standing at room temperature for 24 hours to form a film. The obtained bacterial cellulose film is washed with deionized water and then freeze-dried;

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

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

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

[0033] (5) Take out the cellulose membrane obtained by the reaction, rinse with deionized...

Example Embodiment

[0035] Example 3

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

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

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

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

[0040] (5) Take out the cellulose membrane obtained by the reaction, rinse...

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
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