Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of molybdenum disulfide nanosheet/polyimide-based composite airgel and preparation method thereof

A polyimide-based, composite aerogel technology, applied in the field of aerogels, can solve the problems of easy stacking and difficult dispersion, and achieve easy operation, simple preparation process, excellent thermal stability and flame retardant performance. Effect

Inactive Publication Date: 2019-04-02
FUDAN UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molybdenum disulfide bulk material is easy to stack due to the strong interaction between the layers, and it is difficult to disperse

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of molybdenum disulfide nanosheet/polyimide-based composite airgel and preparation method thereof
  • A kind of molybdenum disulfide nanosheet/polyimide-based composite airgel and preparation method thereof
  • A kind of molybdenum disulfide nanosheet/polyimide-based composite airgel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, the present embodiment comprises the following steps:

[0037] (1) Preparation of molybdenum disulfide nanosheets with good water dispersibility. 1 mmol of ammonium molybdate tetrahydrate and 14 mmol of thiourea were dissolved in 30 mL of deionized water, and then the solution was transferred to a 40 mL hydrothermal kettle and reacted at 200 °C for 12 h. After the reaction, the sample was repeatedly washed 3-5 times with deionized water and dried. Then the dried molybdenum disulfide nanosheets were dispersed in deionized water at a concentration of 8 mg mL -1 .

[0038] (2) The steps for preparing water-soluble polyamic acid are the same as our patent CN104355302A.

[0039] (3) Take 2.5 mL of the prepared 8 mg mL -1 8.5 mL of deionized water and 0.5 g of triethylamine were added to the aqueous dispersion of molybdenum disulfide nanosheets, and sonicated for 0.5 h. Put 1 g of water-soluble polyamic acid fiber into the aqueous dispersion of molybdenum d...

Embodiment 2

[0041] Embodiment 2, this embodiment comprises the following steps:

[0042] Change the ratio of molybdenum disulfide nanosheets and polyamic acid to 5:100, that is, take 6.25 mL of prepared 8 mg mL -1 Molybdenum disulfide nanosheet aqueous dispersion, add 4.75 mL deionized water and 0.5 g triethylamine, sonicate for 0.5 h, the rest is the same as in implementation 1, and finally the prepared molybdenum disulfide nanosheet / polyimide-based composite airgel denoted as MoS 2 / PI-5.

Embodiment 3

[0043] Embodiment 3, this embodiment comprises the following steps:

[0044] Change the ratio of molybdenum disulfide nanosheets and polyamic acid to 8:100, that is, take 10 mL of prepared 8 mg mL -1 Add 1 mL of deionized water and 0.5 g of triethylamine to the aqueous dispersion of molybdenum disulfide nanosheets, sonicate for 0.5 h, and the rest are the same as in implementation 1. Finally, the prepared molybdenum disulfide nanosheets / polyimide-based composite airgel denoted as MoS 2 / PI-8.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of aerogel and particularly relates to molybdenum disulfide nanosheet / polyimide based composite aerogel and a preparation method thereof. The composite aerogel is prepared by compounding molybdenum disulfide nanosheets with good water dispersibility, prepared by a solvothermal method, with polyimide, and from molybdenum salt, sulfosalt and one or more of water-soluble polyimide precursor, and polyamide acid. The preparation process comprises the steps of preparing molybdenum disulfide nanosheets with good water dispersibility by the one-step solvothermal method, compounding the molybdenum disulfide nanosheets with polyamide acid, and performing sol-gel preparation, freezing-drying and amidation to obtain the molybdenum disulfide nanosheet / polyimide based composite aerogel. The composite aerogel has the characteristics that internal pores are uniformly distributed and the limit oxygen index is obviously higher than relative performance of macromolecule based aerogel in other documents or patents, and thus the composite aerogel can be taken as an ideal flame retardant material, heat insulation material and noise reduced material.

Description

technical field [0001] The invention belongs to the technical field of airgel, and in particular relates to a polymer-based composite airgel and a preparation method thereof. Background technique [0002] Polymer airgel is a porous and lightweight material with a three-dimensional network structure, which has the advantages of low cost, easy molding, high porosity (80–99.8%), and large specific surface area (200–1000 m 2 g -1 )Etc. Its unique porous structure makes polymer aerogels have broad application prospects in heat insulation, flame retardancy, and sound insulation. At present, polymer airgel is usually based on polyvinyl alcohol and phenolic polymer materials, nanoclays (such as montmorillonite, kaolin and halloysite), carbon nanomaterials and SiO 2 etc. are fillers, prepared by sol-gel process and special drying technology (such as freeze drying technology, supercritical drying technology). However, these polymer-based aerogels generally suffer from poor mechan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 刘天西张由芳樊玮左立增鄢家杰鲁恒毅顾华昊
Owner FUDAN UNIV