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A kind of go-sio 2 Preparation method of composite ultra-high molecular weight polyethylene fiber cloth airgel

A polyethylene fiber and ultra-high molecular weight technology is applied in the field of preparation of GO-SiO2 composite ultra-high molecular weight polyethylene fiber cloth aerogel, which can solve the problems of direct use of non-adsorbable materials, poor mechanical properties, and limited application, and achieves The effect of shortening preparation time, excellent adsorption performance, and increasing porosity

Active Publication Date: 2021-10-29
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its high brittleness and low strength, it cannot be directly used as an adsorption material, which greatly limits its application in sewage treatment.
[0005] Therefore, Li Chaoyu of Tianjin University of Science and Technology and others tried to combine hydrophobic and flexible silica airgel with graphene oxide, no longer using chemical reducing agents, retaining the oxygen-containing groups in graphene oxide, and maintaining a certain amount and Binding sites for organic pollutants, but difficult to apply due to poor mechanical properties

Method used

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  • A kind of go-sio <sub>2</sub> Preparation method of composite ultra-high molecular weight polyethylene fiber cloth airgel
  • A kind of go-sio <sub>2</sub> Preparation method of composite ultra-high molecular weight polyethylene fiber cloth airgel

Examples

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example 1

[0031] Add 10ml of graphene oxide aqueous solution with a concentration of 2mg / ml, 8.4ml of MTMS (mass ratio of graphene oxide to MTMS=1:399), 28.4ml of methanol and 8.4ml of deionized water into the beaker. Heat the mixed solution to 30°C and stir in a constant temperature water bath for 15 minutes at a speed of 500 rpm, then add 0.05mol / L acetic acid solution, adjust the pH value to 4, continue stirring for 15 minutes, add 6mol / L ammonia solution, adjust the pH value to 7.5, and speed up the stirring Speed ​​to 600rpm stirring 1min, the prepared GO / SiO 2 Mix the sol and pour it into the mold with a density of 0.82g / cm 3 , an elongation of 3.2%, and a molecular weight of 3 million ultra-high molecular weight polyethylene fiber cloth composite. Let it stand for 1 hour, and after compounding and stably forming a gel, use absolute ethanol as an aging solution to replace the impurity ions in the wet gel, and replace 3 times, each time for 24 hours. After the replacement, the co...

example 2

[0034] Add 7ml of graphene oxide aqueous solution with a concentration of 3mg / ml, 4.2ml of MTMS (mass ratio of graphene oxide to MTMS=1:190), 16.6ml of methanol and 4.2ml of deionized water into the beaker. Heat the mixed solution to 35°C and stir in a constant temperature water bath for 30min at a speed of 550rpm, then add 0.01mol / L acetic acid solution, adjust the pH value to 5, continue stirring for 30min, add 4mol / L ammonia solution, adjust the pH value to 7, and speed up the stirring Speed ​​to 650rpm stirring 5min, the prepared GO-SiO 2 Mix the sol and pour it into the mold with a density of 0.91g / cm 3 , with an elongation of 3.4% and a molecular weight of 3.5 million ultra-high molecular weight polyethylene fiber cloth composite. Let it stand for 1.5 hours, and after compounding and stably forming a gel, use absolute ethanol as an aging solution to replace the impurity ions in the wet gel, and replace 4 times, each time for 24 hours. After the replacement, the composi...

example 3

[0037] Add 5ml of graphene oxide aqueous solution with a concentration of 4mg / ml, 12.6ml of TEOS (mass ratio of graphene oxide to TEOS=1:586), 35.6ml of ethanol and 9.5ml of deionized water into the beaker. Heat the mixed solution to 40°C and stir in a constant temperature water bath for 15 minutes at a speed of 600rpm, then add 0.05mol / L acetic acid solution, adjust the pH value to 4.5, continue stirring for 15 minutes, add 6mol / L ammonia solution, adjust the pH value to 7.5, and speed up the stirring Speed ​​to 700rpm stirring 1min, the prepared GO-SiO 2 Mix the sol and pour it into the mold with a density of 0.96g / cm 3 , The elongation is 3.6%, and the molecular weight is 4 million ultra-high molecular weight polyethylene fiber cloth composite. Let stand for 2 hours, and after compounding and stably forming a gel, use deionized water as an aging solution to replace the impurity ions in the wet gel, and replace 5 times, 24 hours each time. After the replacement, the compos...

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Abstract

A kind of GO-SiO of the present invention 2 The invention discloses a preparation method of composite ultrahigh molecular weight polyethylene fiber cloth airgel. First add the precursor, alcohol, water and graphene oxide solution into the container, heat and stir in a water bath to form a uniform solution, then add acidic and alkaline reagents in turn to adjust the pH value and stir to obtain GO‑SiO 2 sol; then put the ultra-high molecular weight polyethylene fiber cloth material in the container, and put GO‑SiO 2 The sol is poured into a container to fully infiltrate the ultra-high molecular weight polyethylene fiber cloth substrate, and after the gel is left to stand, an aging solution is added for aging; finally, it is obtained by drying at room temperature. The material used in the process is simple, the process is simple, the preparation period is controlled within 90 minutes, and the preparation time is greatly shortened.

Description

technical field [0001] The invention belongs to the field of preparation technology of nanoporous materials, in particular to GO-SiO with superhydrophobic properties, large specific surface area and good flexibility 2 The invention discloses a preparation method of composite ultrahigh molecular weight polyethylene fiber cloth airgel. Background technique [0002] Among the many allotropes of carbon, graphene is the most active one. By exfoliating it from graphite, a two-dimensional carbon material with a lamellar structure can be formed. Compared with other carbon materials, graphene has a large specific surface area, excellent mechanical properties and thermal conductivity, and is widely used in the fields of environment, materials, optoelectronics, chemicals, energy, and biology. [0003] The chemical reduction method can be used to prepare pure graphene airgel. The reducing agent reduces graphene oxide to graphene, which will lead to the disappearance of a large number ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02
Inventor 沈晓冬严文倩崔升叶欣刘伟
Owner NANJING TECH UNIV