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

A nanocellulose/glass fiber/immobilized nanosilver durable antibacterial filter material and its preparation method and application

A technology of nano-cellulose and glass fiber, which is applied in the field of filtration, can solve the problems of weak binding force between nano-silver and the filter material substrate, excessive release, and easy leakage, etc., which is conducive to large-scale industrial production, meets demand, and has low cost Effect

Active Publication Date: 2022-07-26
SOUTH CHINA NORMAL UNIVERSITY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the binding force between nano-silver and the filter substrate is weak, and it is easy to leak or release too much when directly added

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 nanocellulose/glass fiber/immobilized nanosilver durable antibacterial filter material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation of a nanocellulose glass fiber durable antibacterial filter material, the specific steps are as follows:

[0038] (1) The hectorite (diameter 25nm) solution with a concentration of 0.1 g / L was prepared, and 5 mL of silver ammonia solution with a concentration of 0.001 mol / L was added to 40 mL of hectorite solution under stirring, and the mixture was uniform to obtain hectorite- Silver ammonia mixed solution;

[0039](2) in the hectorite-silver ammonia mixed solution obtained in step (1), adding the alkali lignin solution with a concentration of 1 g / L to obtain a reaction solution, the volume of the alkali lignin solution being 10% of the volume of the reaction solution %, carry out the reduction reaction, the reaction temperature is 50 ℃, and the reaction is carried out for 30 minutes to obtain the hectorite-immobilized nano-silver composite antibacterial agent, which is for subsequent use;

[0040] (3) Disperse glass fibers (fiber diameter 0.5 μm), nan...

Embodiment 2

[0044] The preparation of a nanocellulose glass fiber durable antibacterial filter material, the specific steps are as follows:

[0045] (1) The hectorite (diameter 25nm) solution with a concentration of 1 g / L was prepared, and 5 mL of silver ammonia solution with a concentration of 0.1 mol / L was added to 40 mL of hectorite solution under stirring, and the mixture was uniform to obtain hectorite-silver Ammonia mixed solution;

[0046] (2) in the hectorite-silver ammonia mixed solution obtained in step (1), adding the alkali lignin solution with a concentration of 2g / L to obtain a reaction solution, the volume of the alkali lignin solution being 10% of the volume of the reaction solution %, carry out the reduction reaction, the reaction temperature is 60 ℃, and the reaction is carried out for 60 minutes to obtain the hectorite-immobilized nano-silver composite antibacterial agent, which is for subsequent use;

[0047] (3) Disperse glass fibers (fiber diameter 1 μm), nanocellul...

Embodiment 3

[0051] The preparation of a nanocellulose glass fiber durable antibacterial filter material, the specific steps are as follows:

[0052] (1) The hectorite (diameter 25nm) solution with a concentration of 6g / L was prepared, and 5mL of hectorite solution with a concentration of 1mol / L was added to 40mL of hectorite solution under stirring, and mixed well to obtain hectorite-silver ammonia mixture;

[0053] (2) in the hectorite-silver ammonia mixed solution obtained in step (1), add the alkali lignin solution that concentration is 5g / L, obtain reaction solution, and the volume of described alkali lignin solution is 10% of the volume of reaction solution %, carry out the reduction reaction, the reaction temperature is 80 ℃, and the reaction is carried out for 90 minutes to obtain the hectorite-immobilized nano-silver composite antibacterial agent, which is for subsequent use;

[0054] (3) Disperse glass fibers (fiber diameter of 5 μm), nanocellulose (fiber average diameter of 1.5...

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
concentrationaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a nano-cellulose / glass fiber / immobilized nano-silver durable antibacterial filter material and a preparation method and application thereof. The method includes: using lignin as a reducing agent and hectorite as an immobilized template to prepare an immobilized nano-silver composite antibacterial agent; using glass fiber as a filter material substrate, nano-cellulose and oxidized nano-cellulose as flexibility and pore size adjustment agent and dispersing agent, mixed with the immobilized nano-silver antibacterial agent, suction filtration, and freeze-drying to obtain a filter material. The method is simple in process and easy to industrialize, and the obtained filter material has pore channel distribution with different hierarchical structure, high porosity and relatively dense fiber stacking density. In the filter material, the 30-day release ratio of the immobilized nano-silver as an antibacterial agent is less than 15 wt %, and the antibacterial agent is slowly released to ensure its antibacterial durability. When the material is used in a filtering system, the constructed hierarchical pore structure has a hierarchical filtering effect, which can improve the filtering efficiency of pollutants.

Description

technical field [0001] The invention belongs to the field of filtration, and in particular relates to a nanocellulose / glass fiber / immobilized nanosilver durable antibacterial filter material and a preparation method and application thereof. Background technique [0002] In recent years, a large amount of exhaust gas from industrial production, automobile exhaust, and daily combustion has caused serious air pollution problems, especially fine particles (PM2. Serious threat to health. Although the traditional glass fiber filter material can effectively filter the polluted particles, the pore structure of the filter material is homogeneous, and the piezoresistance is large when it intercepts finer particles; and the glass fiber itself has poor mechanical properties, brittleness, and resistance. The abrasiveness is poor, which is not conducive to processing (Building and Environment, 2020, 183, 107182-107193). [0003] Nanocellulose is a negatively charged flexible nanomateria...

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): B01D39/02B01D46/30
CPCB01D39/02B01D46/30B01D46/0028B01D2239/0442B01D2239/10Y02A50/2351
Inventor 罗继文吴正国覃筱葴韦岚升周禧刘叶
Owner SOUTH CHINA NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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