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Porous aerogel based on bionic vascular bundle microstructure and preparation method and application thereof

A technology of porous airgel and microstructure, which is applied in the direction of airgel preparation, separation methods, chemical instruments and methods, etc., can solve the problems of uncontrollable adsorption and mechanical extrusion resistance, and achieve low production cost and low raw material Accessible, highly controllable results

Active Publication Date: 2019-07-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the pore structure of the current airgel materials is mostly disordered. Compared with the ordered structure, the adsorption and mechanical extrusion resistance of the disordered structure assembly have a greater degree of uncontrollability.

Method used

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  • Porous aerogel based on bionic vascular bundle microstructure and preparation method and application thereof
  • Porous aerogel based on bionic vascular bundle microstructure and preparation method and application thereof
  • Porous aerogel based on bionic vascular bundle microstructure and preparation method and application thereof

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preparation example Construction

[0028] The invention provides a method for preparing a porous airgel based on a bionic vascular bundle microstructure, comprising the following steps:

[0029] Mixing inorganic nanofibers, organic polymers and solvents to obtain a mixed slurry;

[0030] The mixed slurry is placed in a mold, the mold containing the mixed slurry is placed on the base, and then freeze casting is performed to obtain a porous airgel based on the bionic vascular bundle microstructure.

[0031] In the present invention, inorganic nanofibers and organic macromolecular polymers are prepared into porous aerogels by freeze casting molding method, which has a "layer-frame-layer" structure assembled from fiber scaffolds and compatible embedding layers ( Wherein, the fiber scaffold is formed by inorganic nanofibers, and the compatible embedding layer is formed by organic polymers), and the "layer-frame-layer" structure is an ordered three-dimensional porous network structure, including dimensional The bion...

Embodiment 1

[0049] Preparation of copper nanowire-sodium alginate porous airgel based on biomimetic vascular bundle microstructure, such as figure 1 shown, including the following steps:

[0050] Weigh 0.49g of sodium alginate (weight-average molecular weight of 15000, degree of polymerization of 5000) solid particles in a 30mL beaker, add 10mL of N,N-dimethylformamide to it, then add 10mL of deionized water, at 500rpm Under mechanical stirring for 12 hours, a uniform sodium alginate solution was obtained;

[0051] Take 5mL of the copper nanowire aqueous dispersion with a concentration of 45mg / mL (wherein, the diameter of the copper nanowire is 20nm and the length is 100 μm), and another 7.5mL of the above-mentioned sodium alginate solution is slowly added to the copper nanowire aqueous dispersion, Under the condition of 300rpm rotating speed, magnetically stir for 8h to obtain the mixed slurry;

[0052] Place a polydimethylsiloxane base (0.01cm in thickness) on a clean copper plate (0....

Embodiment 2

[0054] The preparation of the silver nanowire-sodium alginate porous airgel based on the bionic vascular bundle microstructure comprises the following steps:

[0055] Weigh 1.4g of sodium alginate (weight-average molecular weight: 25,000, polymerization degree: 10,000) solid particles in a 30mL beaker, add 10mL of N,N-dimethylformamide to it, then add 10mL of deionized water, at 500rpm Under mechanical stirring for 12 hours, a uniform sodium alginate solution was obtained;

[0056] Get 5mL concentration and be the silver nanowire aqueous dispersion of 11mg / mL (wherein, the diameter of silver nanowire is 30nm, length is 100 μ m), get another 5mL above-mentioned sodium alginate solution and slowly add in the silver nanowire aqueous dispersion, in Under the condition of 300rpm rotating speed, magnetically stir for 8h to obtain the mixed slurry;

[0057] Place a polydimethylsiloxane base (0.01cm in thickness) on a clean copper plate (0.5cm in thickness), and then place a mold (ma...

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Abstract

The invention relates to the technical field of aerogel materials, in particular to a porous aerogel based on a bionic vascular bundle microstructure and a preparation method and application thereof.The preparation method comprises the following steps of: preparing inorganic nanofibers and organic high molecular polymers into the porous aerogel by using a freezing casting molding method, whereinthe porous aerogel has a layer-shelf-layer structure formed by assembling a fiber shelf and compatible embedding layers, and the layer-shelf-layer structure is an ordered three-dimensional porous network structure and comprises vascular bundle transverse and longitudinal section bionic structures, so that a high-permeability micron channel can be provided, and the porous aerogel has excellent bionic hydrophobic performance and high oil absorption capacity and can be applied to the adsorption separation of the oil product in an oil-water mixture; meanwhile, the porous aerogel also has excellentmechanical extrusion fatigue resistance, can automatically recover to an initial state after a driving deformation load is removed, and can be used as an elastic material.

Description

technical field [0001] The invention relates to the technical field of airgel materials, in particular to a porous airgel based on a bionic vascular bundle microstructure and a preparation method and application thereof. Background technique [0002] After a long period of evolution, biological materials often exhibit optimized multi-scale structures and many excellent properties in terms of light, electricity, magnetism, heat, and force, such as light weight, high strength, self-cleaning, intelligent response, environmental adaptability, Self-healing and self-replication functions, etc., are excellent properties that people dream of in designing and preparing new materials. Therefore, the research and development of biomimetic materials by imitating the structural characteristics and functional properties of biological materials has attracted widespread attention of researchers. However, the development of biomimetic materials should not only simulate the structural charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00B01J20/26B01J20/24B01J20/28B01D17/022
CPCB01D17/0202B01J13/0091B01J20/24B01J20/261B01J20/28047B01J2220/46
Inventor 阎子峰黄剑坤梁保强曾景斌吴军委乔柯
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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