Ag/Fe3O4/nano-cellulose tri-element composite material and preparation method thereof

A nanocellulose and composite material technology, applied in the field of Ag/Fe3O4/nanocellulose ternary composite material and its hydrothermal preparation, can solve the problems of uneven size and distribution of silver particles, inability to recycle, poor antibacterial performance, etc. , to achieve uniform particle size, improved application and good stability

Inactive Publication Date: 2016-06-22
BEIJING FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0011] In order to solve problems such as silver particle size and uneven distribution, poor antibacterial performance, poor stability, and inability to be recycled in silver-based antibacterial materials in the prior art, an object of the present invention is to provide a method for preparing Ag / Fe 3 o 4 / the method of nanocellulose composite material, described method is carried out as follows:

Method used

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  • Ag/Fe3O4/nano-cellulose tri-element composite material and preparation method thereof
  • Ag/Fe3O4/nano-cellulose tri-element composite material and preparation method thereof
  • Ag/Fe3O4/nano-cellulose tri-element composite material and preparation method thereof

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preparation example Construction

[0033] In the preparation method according to the present invention is Fe 3 o 4 The ratio of the weight parts of nanoparticles, silver nitrate and nano cellulose (NCC) is 2~25:10~25:25~60, more preferably the ratio of weight parts is Fe 3 o 4 Nanoparticles: silver nitrate: NCC=2~10:10~20:35~60.

[0034] where Fe 3 o 4 When the amount of nanoparticles is less than 2 parts by weight, Ag / Fe 3 o 4 The photocatalytic properties and superparamagnetism of nanocellulose ternary composites are not ideal; and when Fe 3 o 4 When the amount of nanoparticles is greater than 25 parts by weight, the content of elemental silver is relatively low, and it may be due to Fe 3 o 4 Under the combined influence of the magnetic properties of the nanoparticles themselves and the adhesion of nanocellulose, the prepared Ag / Fe 3 o 4 / The agglomeration phenomenon of the nanocellulose ternary composite material is serious, and it is not easy to disperse, which makes the catalytic performance of ...

Embodiment 1

[0043] Fe 3 o 4 Preparation of particles: 3.0 g of FeCl 3 ˙6H 2 Sodium acetate (NaAc) of 0 and 12g is dissolved in the ethylene glycol / ethylenediamine mixed solution, and wherein the volume of ethylene glycol and ethylenediamine solvent is respectively 90ml and 10ml, after the mixed solution is mechanically stirred for 30min, a yellow liquid appears , put the yellow liquid into a polytetrafluoroethylene high-pressure reactor (150ml), put it in a muffle furnace and heat up to 200°C, and the reaction time is 2 hours. After the reaction is over, naturally cool to room temperature, and take out the reaction product. And it is centrifuged, washed (deionized water and ethanol washed three times each), and finally the precipitate is centrifuged, and it is dried (at a temperature of 60 ° C for 12 hours) to finally obtain Fe 3 o 4 nanoparticles. like image 3 The SEM photo shown, the obtained Fe 3 o 4 Nanoparticles are spherical Fe with a diameter of about 203nm 3 o 4 particl...

Embodiment 2

[0050] It was performed in the same manner as in Example 1 except for the following differences.

[0051] Take a small amount of prepared Fe 3 o 4 Powder, after adding deionized water, ultrasonically dispersed to obtain a concentration of 2g / L Fe 3 o 4 aqueous solution; take a small amount of AgNO 3 Powder, after adding deionized water, ultrasonically dispersed to obtain AgNO with a concentration of 10g / L 3 Aqueous solution: Take an appropriate amount of nanocellulose, add deionized water and then ultrasonically disperse to obtain an aqueous dispersion with a concentration of 30 g / L. The three solutions were mixed according to a certain ratio (Fe 3 o 4 Aqueous solution: AgNO 3 Aqueous solution: the volume ratio of nanocellulose aqueous dispersion is 10ml:10ml:10ml, wherein Fe 3 o 4 Nanoparticles: AgNO 3 : the weight ratio of nanocellulose is 2:10:30), packs in polytetrafluoroethylene autoclave (50ml), in muffle furnace (Tianjin Zhonghuan Experimental Electric Furnace...

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Abstract

The invention discloses a method for preparing Ag / Fe 3 o 4 / Nanocellulose composite method using nanocellulose, which acts as a reducing agent while also helping to strengthen Ag and Fe 3 o 4 The binding strength of nanoparticles, and green and pollution-free, is an environmentally friendly preparation method. This method has high reaction selectivity and high reaction efficiency. At the same time, water is used as a solvent. The method can also be prepared by hydrothermal and microwave hydrothermal methods, so it is beneficial to realize industrialization.

Description

technical field [0001] The invention relates to a silver-based inorganic antibacterial composite material and a preparation method thereof, in particular to an Ag / Fe 3 o 4 / Nanocellulose ternary composite material and its hydrothermal preparation method. Background technique [0002] Microorganisms such as bacteria, molds and viruses can easily infect and harm humans. Inorganic nano-antibacterial materials can be used to prevent humans from being infected by harmful microorganisms. Therefore, designing and preparing a new type of material with excellent antibacterial properties is essential for improving human survival. The environment is of great significance. In the 1980s, people realized that silver is a real broad-spectrum natural antibiotic, which has the advantages of no drug resistance, no toxicity, no allergies, and no cross-drug interference. Studies have found that when silver encounters respiratory enzymes, it can become silver ions and combine with it, causing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06A01N59/16A01P1/00B01J20/24B01J20/28B01J20/30C02F1/28C02F1/32C02F1/50C02F101/38C02F101/20
CPCB01J31/06A01N59/16B01J20/02B01J20/0233B01J20/24B01J20/28009B01J35/0033B01J35/004B01J2220/4825C02F1/285C02F1/32C02F1/50C02F2101/20C02F2101/308C02F2101/40C02F2305/10
Inventor 马明国董闫闫刘姗刘艳军杨俊许凤
Owner BEIJING FORESTRY UNIVERSITY
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