Preparation method of walnut shell biomass C/Fe3O4/Cu microwave absorbing material
A microwave absorbing material and biomass technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of complex structure and low comprehensive utilization rate, and achieve the effect of reasonable design and good popularization and application value.
Active Publication Date: 2019-08-23
LULIANG UNIV
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Problems solved by technology
However, due to the complex structure of lignocellulose and low comprehensive utilization rate, in order to improve its comprehensive utilization efficiency, it is one of the most effective ways to make it into biomass carbon materials
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[0021] Specific embodiments of the present invention will be described in detail below.
[0022] A kind of walnut shell biomass C / Fe 3 o 4 The preparation method of / Cu microwave absorbing material comprises the steps:
[0023] (1) The walnut shells are dried, crushed, and sieved to particles below 500 μm for later use.
[0024] (2), 2.59g FeCl 3 ·6H 2 O was dissolved in 200mL aqueous solution, fully stirred and dissolved to form a solution for later use.
[0025] (3) Add 1~10g of the walnut shell powder prepared in step (1) to the ferric chloride solution in step (2), stir and soak fully for about 0.5h, filter and dry to obtain walnut shell powder / FeCl 3 solid.
[0026] (4), 2.27g FeCl 2 4H 2 Add O and 0.5g copper powder to 100mL ethanol, add 0.05~0.5g sodium lauryl sulfate, carry out ultrasonic dispersion for 0.5~2h, after the dispersion is completed, add step (3) walnut shell powder / FeCl 3 Solid, fully stirred and soaked for about 0.5h, filtered and dried to obtain ...
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Abstract
The invention discloses a preparation method of a walnut shell biomass C / Fe3O4 / Cu microwave absorbing material. The preparation method comprises the following steps: (1) drying walnut shells, carryingout crushing and sieving to 500 microns or below for later use; (2) dissolving FeCl3.6H2O in a water solution, and fully carrying out stirring for dissolution to obtain a solution for later use; (3)adding walnut shell powder prepared in the step (1) into the ferric chloride solution obtained in the step (2), fully carrying out stirring and soaking for 0.5 hour, and carrying out filtering and drying to obtain a walnut shell powder / FeCl3 solid; and (4) adding FeCl2.4H2O and copper powder into ethanol, adding lauryl sodium sulfate, carrying out ultrasonic dispersion for 0.5-2 hours, and addingthe walnut shell powder / FeCl3 solid obtained in the step (3), fully carrying out stirring and soaking for 0.5 hour, and carrying out filtering and drying to obtain the walnut shell powder / FeCl3 / FeCl2 / copper powder solid. The method is reasonable in design and has good popularization and application values.
Description
technical field [0001] The invention relates to the field of preparation of wave-absorbing materials, specifically a walnut shell biomass C / Fe 3 o 4 / Cu microwave absorbing material preparation method. Background technique [0002] With the continuous progress of modern science and technology, whether in the field of physics or chemistry, the application of microwave is becoming more and more extensive. Ideal microwave absorbing materials have the advantages of light weight, thinness, strong absorption, and wide absorption frequency band. According to the loss mechanism of the electromagnetic wave absorbing material, the absorbing material can be divided into two types: magnetic loss absorbing material and electric loss absorbing material. Magnetic loss absorbing materials include carbonyl iron, ferrite, ultrafine magnetic metal powder, TiO 2 , ZnO, SiC, etc., show the advantages of strong absorption and broadband, but are limited by their high density and poor high temp...
Claims
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IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 秦永其王毅邓立强郭晨杨卫民
Owner LULIANG UNIV