Bio-based material with multi-stage pore structure as well as preparation method and application thereof

A bio-based, secondary pore technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of inability to prepare gels and insufficient gel formation, achieve good performance, prevent leakage, and compare The effect of large surface area

Pending Publication Date: 2021-01-22
重庆盾之王安防设备技术研究院有限公司 +1
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  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the sol-gel method is usually used to prepare cellulose nanocrystalline airgel, that is, the gel needs to be prepared first, and then dried to obtain the airgel. However, the rigid rod-like structure of cellulose nanocrystals cannot be like cellulose or cellulose nanofibers. Gels are prepared by entanglement between molecular chains as cross-linking points; in addition, hydrogen bonds between cellulose nanocrystals are not sufficient to form gels

Method used

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  • Bio-based material with multi-stage pore structure as well as preparation method and application thereof
  • Bio-based material with multi-stage pore structure as well as preparation method and application thereof
  • Bio-based material with multi-stage pore structure as well as preparation method and application thereof

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Embodiment 1

[0037] A bio-based material with a multi-level subporous structure, including aerogel and a metal-organic framework coated outside the aerogel. The aerogel contains rigid cellulose nanocrystalline particles and flexible long-chain polymers, metal-organic The pores between the frame and the airgel and the airgel are provided with active functional substances with particle diameters less than or equal to 20nm. The metal organic framework is one or more of metal organic frameworks containing carboxylic acid ligands, metal organic frameworks containing nitrogen heterocyclic ligands, and metal organic frameworks containing mixed ligands containing carboxylic acid and nitrogen heterocyclic rings. Specifically, the flexible long-chain macromolecule in this embodiment uses polyethylene glycol with different molecular weights.

[0038] This embodiment also provides a method for preparing a bio-based material with a multi-level secondary pore structure, comprising the following steps: ...

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Abstract

The invention relates to the field of material preparation, in particular to a bio-based material with a multistage pore structure. The bio-based material comprises aerogel and a metal organic framework coating the aerogel, wherein cellulose nanocrystalline particles are contained in the aerogel, and active functional substances with the particle size smaller than or equal to 20 nm are arranged inpores between the metal organic framework and the aerogel and in the aerogel.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a bio-based material with a multi-level secondary pore structure and a preparation method and application thereof. Background technique [0002] Airgel is a three-dimensional continuous nanoporous solid material obtained by drying hydrogel or organogel, which has the characteristics of light and porous. Cellulose nanocrystals are a natural, renewable and abundant rod-shaped nanomaterial with high aspect ratio and chemical modification activity. Because cellulose nanocrystals have the characteristics of nanometer size, low density, and surface polyhydroxyl structure, the preparation of aerogels using cellulose nanocrystals has low density (as low as 0.002g / m 3 ), high porosity (up to 99%), high specific surface area (1.7~600m 2 / g) and chemical modification. [0003] At present, the sol-gel method is usually used to prepare cellulose nanocrystalline airgel, that is, the gel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J31/22
CPCB01J20/226B01J20/24B01J20/28047B01J20/205B01J35/0013B01J31/2239
Inventor 黄进周厚勇郑蜀玉刘柳
Owner 重庆盾之王安防设备技术研究院有限公司
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