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Mesoporous inorganic fiber composite material as well as preparation method and application thereof

A composite material and inorganic fiber technology, which is applied in the field of mesoporous inorganic fiber composite materials and their preparation, can solve the problems of harsh technical conditions, high equipment requirements, complicated operations, etc., and achieves the goal of simplifying the preparation process, saving costs, and improving the preparation efficiency. Effect

Pending Publication Date: 2022-02-15
GUANGZHOU HKUST FOK YING TUNG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to obtain a complete and crack-free airgel composite material, supercritical drying technology is often used to prepare it. The technical conditions are harsh, the operation is complicated, the equipment requirements are high, the energy consumption is also large, and the cost is high.

Method used

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  • Mesoporous inorganic fiber composite material as well as preparation method and application thereof
  • Mesoporous inorganic fiber composite material as well as preparation method and application thereof
  • Mesoporous inorganic fiber composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A mesoporous inorganic fiber composite material is prepared by the following method:

[0052] 1. Substrate preparation.

[0053] The halloysite fiber membrane was treated at 1200°C for 2h, and then hydrothermally treated in a nitric acid solution with a concentration of 2mol / L, wherein the hydrothermal temperature was 180°C, and the hydrothermal time was 12h, then it was washed to neutral and dried. Get the base material.

[0054] 2. Mother liquor preparation.

[0055] A homogeneous silica sol mother liquor is prepared by acid-catalyzed hydrolysis of tetraethyl orthosilicate and alkali-catalyzed gel. The specific preparation method is as follows:

[0056] a. Mix tetraethyl orthosilicate (TEOS) and ethanol with a molar ratio of 1:10, stir with a magnetic stirrer at 100-500rpm for 5-30min and mix well, add a certain amount of water and hydrochloric acid mixture to dissolve Its pH value is adjusted to 2-3, wherein the molar ratio of water to hydrochloric acid is 1:4.5×1...

Embodiment 2

[0071] A mesoporous inorganic fiber composite material is prepared by the following method:

[0072] 1. Substrate preparation.

[0073] The halloysite fiber membrane was treated at 1200°C for 2h, and then hydrothermally treated in a nitric acid solution with a concentration of 2mol / L, wherein the hydrothermal temperature was 180°C, and the hydrothermal time was 12h, then it was washed to neutral and dried. Get the base material.

[0074] 2. Mother liquor preparation.

[0075] A homogeneous silica sol mother liquor is prepared by acid-catalyzed hydrolysis of tetraethyl orthosilicate and alkali-catalyzed gel. The specific preparation method is as follows:

[0076] a. Mix tetraethyl orthosilicate (TEOS) and ethanol with a molar ratio of 1:10, stir with a magnetic stirrer at 100-500rpm for 5-30min and mix well, add a certain amount of water and hydrochloric acid mixture to dissolve Its pH value is adjusted to 2-3, wherein the molar ratio of water to hydrochloric acid is 1:4.5×1...

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Abstract

The invention relates to a mesoporous inorganic fiber composite material as well as a preparation method and application thereof, belonging to the technical field of inorganic composite materials. The method comprises the following steps: constructing a nano-structure on the surface of halloysite fiber by adopting a high-temperature treatment technology, enriching surface hydroxyl groups of the halloysite fiber by adopting a hydrothermal treatment method, and compounding a fiber membrane serving as a base material with silicon dioxide aerogel mother liquor to allow the gaps of the fiber membrane to be filled with the silicon aerogel mother liquor; and preparing the compact aerogel composite material by a normal-pressure drying method. According to the preparation method, the mesoporous inorganic fiber composite material as well as a compact and crack-free mesoporous aerogel / fiber membrane composite membrane without volume shrinkage can be obtained by using a normal-pressure drying method, the preparation procedures of the normal-pressure drying method can be simplified, preparation efficiency is greatly improved, cost is saved, and the mesoporous inorganic fiber composite material is expected to be widely applied to the fields of efficient adsorption, nano-catalyst loading, high-temperature gas catalysis and the like.

Description

technical field [0001] The invention relates to the technical field of inorganic composite materials, in particular to a mesoporous inorganic fiber composite material and its preparation method and application. Background technique [0002] Porous materials are generally divided into macroporous materials, mesoporous materials (with a pore size of 2-50 nm) and micro-nanoporous materials according to their pore size distribution. Designing a porous material rich in nanopore structure through a specific process can greatly increase the specific surface area of ​​the material, so that the material can obtain more interfaces that interact with external substances, and can further broaden the application field of porous materials. In addition, due to the dual mesoporous channels with different sizes, the dual mesoporous materials have the characteristics of efficiently dispersing active substances and simultaneously providing efficient diffusion channels, so they are especially p...

Claims

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Application Information

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IPC IPC(8): C04B30/02C04B38/00C04B20/04C04B20/02C04B14/06B01J21/16B01J35/06B01J32/00C04B14/46
CPCC04B30/02C04B14/064C04B20/04C04B20/023B01J21/16C01B33/145C04B2111/0081B01J35/59C04B14/4656C04B38/0045C04B38/0054
Inventor 吕冬梁初军沈运文吴景深
Owner GUANGZHOU HKUST FOK YING TUNG RES INST