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Preparation method of shell-like structure cellulose nanofiber/black phosphorene composite film

A nanofiber and cellulose technology, applied in the field of bionics, can solve the problems of no preparation method of phosphorene-cellulose nanofiber composite film, no good treatment method, poor mechanical properties of the film, etc., and achieve high strength and low cost. , the effect of uniform size

Active Publication Date: 2019-02-22
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the prepared black phosphorene-based thin film has poor mechanical properties and complicated preparation process
In addition, there is no good treatment method for the shortcomings of phosphorene lamination and surface modification, and there is no phosphorene-cellulose nanofiber composite film and its preparation method so far.

Method used

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  • Preparation method of shell-like structure cellulose nanofiber/black phosphorene composite film
  • Preparation method of shell-like structure cellulose nanofiber/black phosphorene composite film
  • Preparation method of shell-like structure cellulose nanofiber/black phosphorene composite film

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] In this example, the preparation steps of the shell-like structure cellulose nanofiber / black phosphorene composite film are as follows:

[0038] 1. Preparation of cellulose nanofiber dispersion

[0039] Take 1g of cotton linters, 0.01gTEMPO and 0.1gNaBr into 500mL of deionized water, then add 0.1g of NaClO to the system, and adjust the pH value of the system to about 9 through NaOH solution. After 6 hours of reaction, the oxidized fiber The obtained oxidized cellulose was dispersed in deionized water and ultrasonically stirred for 30 min to obtain a cellulose nanofiber dispersion with a concentration of 0.5%.

[0040] 2. Preparation of Hydroxylated Black Phosphorus

[0041] First mix 500mg of red phosphorus, 120mg of tin powder and 30mg of tin iodide according to a certain ratio, put them in a mortar, crush them and mix them evenly, then seal the tube, and encapsulate the above mixed powder into a certain size of quartz in an argon atmosphere. Then put the above-mention...

Embodiment 2

[0053] In this example, the preparation steps of the shell-like structure cellulose nanofiber / black phosphorene composite film are as follows:

[0054] 1. Preparation of NFC dispersion

[0055] Take 1g of cotton linters, 0.01g of TEMPO and 0.1g of NaBr, and add the above materials into 500mL of deionized water, then add 0.1g of NaClO to the system, and adjust the pH value of the system to about 9 through NaOH solution. After 6 hours of reaction Filter the oxidized cellulose and wash it with deionized water several times to obtain TEMPO oxidized cellulose; disperse the obtained oxidized cellulose in deionized water, and stir it ultrasonically for 30 minutes to obtain a cellulose nanofiber dispersion with a concentration of 0.5%. , which is 0.5% NFC dispersion.

[0056] 2. Preparation of hydroxylated black phosphorus

[0057] First mix 500mg of red phosphorus, 120mg of tin powder and 30mg of tin iodide according to a certain ratio, put them in a mortar, crush them and mix them...

Embodiment 3

[0063] In this example, the preparation steps of the shell-like structure cellulose nanofiber / black phosphorene composite film are as follows:

[0064] 1. Preparation of NFC dispersion

[0065] Take 1g of cotton linters, 0.01g of TEMPO and 0.1g of NaBr, and add the above materials into 500mL of deionized water, then add 0.1g of NaClO to the system, and adjust the pH value of the system to about 9 through NaOH solution. After 6 hours of reaction Filter the oxidized cellulose and wash it with deionized water several times to obtain TEMPO oxidized cellulose; disperse the obtained oxidized cellulose in deionized water, and stir it ultrasonically for 30 minutes to obtain a cellulose nanofiber dispersion with a concentration of 0.5%. , which is 0.5% NFC dispersion.

[0066] 2. Preparation of hydroxylated black phosphorus

[0067] First mix 500mg of red phosphorus, 120mg of tin powder and 30mg of tin iodide according to a certain ratio, put them in a mortar, crush them and mix them...

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Abstract

The invention discloses a preparation method of a shell-like structure cellulose nanofiber / black phosphorene composite film. The method comprises the following steps: obtaining stably existing cellulose nanofiber / black phosphorene dispersion by virtue of hydrogen bond interaction, and forming the layered cellulose nanofiber / black phosphorene composite film in a self-assembly manner. According to the preparation method disclosed by the invention, the cellulose nanofiber serves as a construction module of a black phosphorene nano-composite film, self-assembly is performed by adopting a vacuum suction filtration method, and the shell-like structure layered composite film having excellent mechanical property and fireproof performance. The cellulose nanofiber / black phosphorene composite film prepared by the invention has an ordered 'brick-mud' layered structure, is excellent in mechanical property, additionally has excellent biocompatibility, and can be applied to the fields of tissue engineering, biological medicines and the like.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite film, in particular to a preparation method of a shell-like structure cellulose nanofiber / black phosphorene composite film, and belongs to the field of bionic technology. Background technique [0002] Shell is a perfect structure created by nature in the long-term evolution process. It is composed of biopolymers, which contain typical collagen, keratin and chitin, accounting for 1-5%; and another part of inorganic minerals, usually An organic-inorganic natural layered structure material composed of calcium phosphate, calcium carbonate and amorphous silica. The unique multi-level ordered "brick-mud" assembly structure of the shell endows it with excellent mechanical properties of light weight, high strength and good toughness. Inspired by the "brick-mud" structure of natural shells, researchers used different methods to prepare a series of bionic high-strength and super-toughness layered ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/04C08K3/02C08J5/18
CPCC08J5/18C08J2301/04C08K2003/026
Inventor 胡源邱水来胡伟兆宋磊
Owner UNIV OF SCI & TECH OF CHINA
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