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Preparation method of high-strength, antibacterial and self-repairing boron nitride layer-by-layer self-assembly composite film

A boron nitride layer and composite film technology, applied in the coating and other directions, can solve the problems of easy damage in the process of use, weak mechanical strength, low immunity, etc., to improve self-healing performance, strong mechanical strength, promote The effect of lateral diffusion

Active Publication Date: 2017-03-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem that the existing self-repairing materials have relatively weak mechanical strength and low immunity, so that they are easily damaged during use, and provide a high-strength, antibacterial and self-repairing boron nitride layer Preparation method of layer self-assembled composite film

Method used

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  • Preparation method of high-strength, antibacterial and self-repairing boron nitride layer-by-layer self-assembly composite film
  • Preparation method of high-strength, antibacterial and self-repairing boron nitride layer-by-layer self-assembly composite film
  • Preparation method of high-strength, antibacterial and self-repairing boron nitride layer-by-layer self-assembly composite film

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specific Embodiment approach 1

[0046] Embodiment 1: The preparation method of a high-strength, antibacterial and self-repairing boron nitride layer-by-layer self-assembled composite film described in this embodiment is specifically carried out according to the following steps:

[0047] 1. Dispersion of boron nitride:

[0048] Add tannic acid into deionized water, and stir in the dark for 0.5h~1h to obtain a dispersed tannic acid solution, add boron nitride to the dispersed tannic acid solution, and Stir for 0.5h~1h under the condition of 1 hour, transfer to the reaction kettle after stirring, then put the reaction kettle in the oven, and react for 12h~18h at the temperature of 100℃~130℃ to obtain milky white nitriding Boron dispersion, finally centrifuge the milky white boron nitride dispersion at a speed of 3000r / min to 4000r / min for 10min to 20min, take the supernatant and adjust the pH of the supernatant to 2 to 3 to obtain an assembly solution ;

[0049] Described boron nitride is hexagonal boron nitr...

specific Embodiment approach 2

[0064] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the negatively charged glass sheet described in Step 3 ① is specifically prepared according to the following steps: the glass substrate is placed in ethanol and ultrasonicated for 20 min to 30 min, Obtain the glass substrate after ultrasonic treatment, then immerse the glass substrate after ultrasonic treatment in the treatment liquid, treat it for 2h to 3h, rinse it with deionized water after treatment, and obtain a negatively charged glass sheet; the treatment liquid It is obtained by mixing concentrated sulfuric acid with a mass percentage of 98% and hydrogen peroxide with a mass percentage of 30%, and the mass ratio of the concentrated sulfuric acid to hydrogen peroxide is 3:1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0065] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the lateral size of the boron nitride described in Step 1 is 500nm-10um. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a self-assembly composite film, in particular to a preparation method of a high-strength, antibacterial and self-repairing boron nitride layer-by-layer self-assembly composite film and aims to solve the problems that existing self-repairing materials are easily damaged during usage due to weaker mechanical strength and low immune capacity. The method comprises steps as follows: 1, dispersion of boron nitride; 2, dispersion of polyvinyl alcohol; 3, preparation of the boron nitride layer-by-layer self-assembly composite film. The method is used for preparing the high-strength, antibacterial and self-repairing boron nitride layer-by-layer self-assembly composite film.

Description

technical field [0001] The invention relates to a preparation method of a self-assembled composite film. Background technique [0002] White hexagonal boron nitride is called "white graphite" because it has a similar crystal structure to graphite. This unique structure endows boron nitride with high mechanical strength, oxidation resistance, high thermal conductivity, and extremely strong insulating properties, which make it a great potential for new composite materials. However, due to its strong solvent resistance, boron nitride cannot be stably dispersed in common solvents, which seriously hinders the application of boron nitride in composite materials. [0003] Self-healing materials are sought after by researchers all over the world because of their characteristics of saving cost, prolonging service life and saving resources. Once the self-healing material is damaged, the damaged area will self-heal rapidly or under external stimuli. After decades of hard work, altho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00
CPCC03C17/002C03C17/007C03C17/009C03C2217/29C03C2217/445C03C2217/475C03C2218/111
Inventor 杨明齐小东侯莹
Owner HARBIN INST OF TECH
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