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Preparation method of polymerized tannic acid coated high-activity aluminum powder/silicon powder

A tannic acid, high-activity technology, applied in the direction of offensive equipment, compressed gas generation, non-explosive/non-thermal agent components, etc., can solve the problems that are not suitable for industrial production applications, high equipment requirements, and low output, and achieve the goal of containing Rich in carbon, low equipment requirements, and the effect of preventing agglomeration

Active Publication Date: 2021-06-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method requires high equipment, and the output is small, the efficiency is low, and there is still the problem of high cost, which is not suitable for industrial production and application

Method used

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  • Preparation method of polymerized tannic acid coated high-activity aluminum powder/silicon powder
  • Preparation method of polymerized tannic acid coated high-activity aluminum powder/silicon powder
  • Preparation method of polymerized tannic acid coated high-activity aluminum powder/silicon powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 0.22 g of TRIS buffer reagent was dissolved in a methanol / N, N-dimethylformamide solvent of 100 mL of a volume ratio of 1: 1, adjusted pH to 8.5, and then 0.20 g tanning acid (TA), stirred and dissolved A tannic acid-buffer solution was obtained; 0.10 g of nano-aluminum powder was added, stirred from polymerization reaction for 1 h, filtered, washed, and obtained polymerized tanninic acid coated nano-aluminum powder.

[0029] figure 2 with Figure 4 The SEM and TEM diagrams of nano-aluminum powder coated with nano-aluminum powder and a polymerized tanninic acid obtained in the present embodiment, compared that polymerized tannic acid has been formed in a nano-aluminum powder surface. Figure 6 For nano-aluminum powder and the XRD diagram of the polymerized tannin-coated nano-aluminum powder prepared in the present embodiment, the contrast can be found that aluminum peaks are obvious, and the polymerized tannin has no aluminum powder after coating nano-aluminum powder. Natu...

Embodiment 2

[0031] 0.22 g of TRIS buffer reagent was dissolved in a methanol / N, N-dimethylformamide solvent of 100 ml of a volume ratio of 1: 1, adjusted pH to 9.6, then add 0.20 g tanning acid (TA), stirred and dissolved. A tannic acid-buffer solution was obtained; 0.10 g Nano silica powder was added, stirred from polymerization reaction for 6 h, filtered, washed, and obtained nano-silica powder coated polymerized tannic acid.

[0032] image 3 with Figure 5 The polymerized tanninic acid obtained by nano-silica powder and the present embodiment, respectively, the SEM and TEM photograph of nano-silica powder, comparison, polymerized tannic acid has been formed uniformly in the surface of the nanowoxic powder. Figure 7 The XRD diagram of the polymerized tannic acid obtained by nano-silica powder and the present invention, the contrast can be found that the silicon peaks are obvious, and the polymerized tannic acid is covered with nano-silicon powder and did not change the silicon powder The ...

Embodiment 3

[0034] 0.22 g of TRIS buffer reagent was dissolved in a methanol / N, N-dimethylformamide solvent of 100 mL of a volume ratio of 1: 1, adjusted pH to 8.5, and then 0.20 g tanning acid (TA), stirred and dissolved A tannic acid-buffer solution was obtained; 0.10 g of micron aluminum powder was added, stirred from polymerization reaction for 1 h, filtered, washed, to obtain a polymerized tannic acid coated micron aluminum powder.

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Abstract

The invention discloses a preparation method of polymerized tannic acid coated high-activity aluminum powder / silicon powder. The method first dissolves the buffer reagent in an organic solution, adds tannic acid, stirs and dissolves to obtain a tannic acid-buffer solution, then disperses aluminum powder or silicon powder into the tannic acid-buffer solution, and stirs for self-polymerization , to obtain aluminum or silicon powder coated with polymerized tannic acid. The raw material of the invention has wide sources, is environmentally friendly and safe, is simple and convenient, and is suitable for industrialized production. The aluminum or silicon@polymerized tannic acid core-shell structure composite material prepared by the invention can effectively prevent the rapid oxidation of the surface of aluminum / silicon particles and protect the activity of aluminum powder or silicon powder. When aluminum or silicon@polymerized tannic acid core-shell structure composites are added to solid propellants for high-temperature combustion, because the coated polymerized tannic acid is rich in carbon, it can provide additional combustion heat and promote the rapid combustion of aluminum powder or silicon powder. Combustion reaction, thereby improving the combustion performance of solid propellants.

Description

Technical field [0001] The invention belongs to the technical field of energy-sensible materials, and is related to the preparation method of polymerized tannic acid coated high active aluminum powder / silicon powder. Background technique [0002] Single row acid is a plant polyphenolic compound existing in natural plants (tea, wood and oak), and itself contains five dihydroxymethyl ester groups (PAN L, WANG H, WU C, ET AL) .Tannic-acid-coatedPolyPropylene Membrane as a separator for lithium-ion batteries [J] .acsapplied Materials & Interfaces, 2015, 7 (29): 16003-16010. Similar to the polyopabamine coating, the tanning acid coating can also be oxidized from polymerization at room temperature to form polymerizenic acid, and the thickness of the resulting polymer tanning acid coating can be accurately controlled between one and tens of nanometers. a stable performance at a low temperature polymeric coating material (SileikaT S, Barrett DG, Zhang R, et al.Colorless multifunctional...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/00C06B45/32C06B23/00C06D5/06C08G65/38
CPCC06B23/007C06B33/00C06B45/32C06D5/06C08G65/38
Inventor 张文超陈亚杰吴刚刚俞春培王嘉鑫陈俊宏刘琦
Owner NANJING UNIV OF SCI & TECH
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