Bacterial cellulose film/nano-iron composite material and preparation method and application thereof

A technology of bacterial cellulose membrane and composite materials, which is applied in the field of bacterial cellulose/nano-iron composite materials and its preparation, can solve problems such as easy agglomeration and activity decline, and achieve the goals of protecting the water environment, improving removal capacity, and facilitating recycling Effect

Active Publication Date: 2018-05-15
RENMIN UNIVERSITY OF CHINA
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its nanostructure, it is prone to ag

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
  • Bacterial cellulose film/nano-iron composite material and preparation method and application thereof
  • Bacterial cellulose film/nano-iron composite material and preparation method and application thereof
  • Bacterial cellulose film/nano-iron composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1. Preparation of bacterial cellulose membrane / nano-iron composite material

[0038] 1) First, cut the bacterial cellulose membrane into a disc with a diameter of about 3 cm, and place the obtained disc in 100 ml of a sodium hydroxide solution with a mass concentration of 20 g / L for 12 hours to obtain activated bacteria Cellulose film.

[0039] 2) Place the activated-bacterial cellulose membrane in a beaker containing 100 ml of ethanol / water solution with a volume ratio of 7 / 3, control the stirring speed to 15 rpm, and continue stirring for 1 hour; then take out the membrane and absorb it with filter paper Dry, put it into 100% ethanol again and continue to stir and extract for 1 hour, and then absorb dry again with filter paper to obtain a semi-dehydrated-activated-bacterial cellulose membrane.

[0040] 3) Put the prepared semi-dehydrating-activated-bacterial cellulose membrane in a four-necked flask, and add 100 ml of 0.1 mol / liter ferrous sulfate solution under the...

Example Embodiment

[0041] Example 2: Bacterial cellulose membrane / nano-iron composite material to remove diclofenac sodium in water

[0042] The selected model pollutant is diclofenac sodium, the structural formula is as follows:

[0043]

[0044] Accurately measure 50 ml of a 20mg / L diclofenac sodium solution in a glass bottle, set the temperature to 20°C, and then place the bacterial cellulose membrane / nano-iron composite material prepared in Example 1 in the above solution as the experimental group (BCM / Fe 0 ). In addition, accurately measure 50ml of 20mg / L diclofenac sodium solution in a glass bottle, set the temperature to 20℃, and then place the pure bacterial cellulose membrane of the same specification in the above solution as a blank control group (Blank) .

[0045] Samples were taken at 10, 20, 30, and 60 minutes, and the concentration of diclofenac sodium was determined by high performance liquid chromatography (HPLC). The results are as follows figure 2 Shown.

[0046] From figure 2 It c...

Example Embodiment

[0047] Example 3: Bacterial cellulose membrane / nano-iron composite material removes virus MS2 in water

[0048] The selected model virus is MS2 phage, and its capsid structure is as image 3 Shown.

[0049] The initial concentration of MS2 to the bacterial cellulose membrane / nano-iron composite prepared in Example 1 was 10 6 The pfu / mL solution was used for the removal experiment, and the pure bacterial cellulose membrane of the same specification was used as the blank control (Blank), and the results were as follows Figure 4 Shown.

[0050] by Figure 4 It can be seen that as the reaction time increases, BCM / Fe 0 The removal of MS2 gradually increased. After 4 hours of reaction, MS2 in the water body was basically completely removed, and the effect was good. The pure bacterial cellulose membrane has no effect on MS2.

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 discloses a bacterial cellulose film/nano-iron composite material and a preparation method thereof. The preparation method of the bacterial cellulose film/nano-iron composite material comprises the following steps of: (1) putting bacterial cellulose film in an alkaline solution for activation to obtain activated bacterial cellulose film; (2) performing extraction on the activated bacterial cellulose film by using a polar-alcohol aqueous solution so as to remove free water/bound water on the surface and interior of the film and therefore obtain semi-dehydrated activated bacterialcellulose film; and (3) putting the semi-dehydrated activated bacterial cellulose film in a ferrous ion solution, and performing in-situ reduction on ferrous ions under the action of sodium borohydride to obtain the bacterial cellulose film/nano-iron composite material. According to the bacterial cellulose film/nano-iron composite material and the preparation method thereof, an activation in-situchemical precipitation method is adopted to prepare the bacterial cellulose film loaded nano-iron composite material, so that nano-iron is distributed unformly in the interior and on the surface of the bacterial cellulose film, and thus the ability of removal of microorganisms/organic pollutants is improved.

Description

technical field [0001] The invention belongs to the field of preparation of organic-inorganic composite materials, and in particular relates to a bacterial cellulose / nanometer iron composite material and its preparation method and application. Background technique [0002] Bacterial cellulose (bacterial cellulose), also known as microbial cellulose, is a biopolymer produced by bacteria. Known as β-1,4-glucose, it is a new type of biomaterial with high crystallinity, high water holding capacity, ultrafine nanofiber network and high elastic modulus. As a new and efficient reducing agent, nano-iron is widely used in the treatment of heavy metals and organic pollutants in water. However, due to its nanostructure, it is prone to agglomeration, resulting in a decrease in its activity. Therefore, how to reduce the agglomeration of nano-iron and improve its reactivity is an urgent problem to be solved. Contents of the invention [0003] The purpose of the present invention is t...

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): C08J7/12C02F1/70C08L1/02
CPCC02F1/705C08J7/12C08J2301/02
Inventor 程荣申亮杰康敉陈迪石磊郑祥马中
Owner RENMIN UNIVERSITY OF CHINA
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