Method for preparing resorcinol-formaldehyde aerogel

A technology of resorcinol and formaldehyde gas, applied in chemical instruments and methods, colloidal chemistry, colloidal chemistry and other directions, can solve the problems of limiting the application of resorcinol-formaldehyde aerogel, and achieve fast reaction rate and shorten the reaction time. effect of time

Inactive Publication Date: 2014-07-23
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
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Problems solved by technology

It usually takes 3 to 5 days to gel by this method, which limits the application of resorcinol-formaldehyde aerogels.
[0004] At

Method used

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  • Method for preparing resorcinol-formaldehyde aerogel
  • Method for preparing resorcinol-formaldehyde aerogel
  • Method for preparing resorcinol-formaldehyde aerogel

Examples

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Embodiment 1

[0024] Example 1 Preparation of resorcinol-formaldehyde airgel by ultraviolet light initiation method

[0025] First configure 30ml of resorcinol-formaldehyde solution with a certain concentration. The solution is composed of: 0.9706g of resorcinol, 0.05mol / L sodium carbonate solution of 0.88ml, and 1.33ml of formaldehyde solution. Stir to make it fully mixed, 60 Place in water at ℃ for 30 minutes, cool to room temperature, add 10wt% photoinitiator 659, mix well, transfer 0.1ml to a small container and seal it, use a wavelength range of 250-720nm, a distance of 2cm, and a light intensity of 18.26w / cm 3 Irradiated by a high-pressure mercury lamp. The time at which a solution loses fluidity is defined as the gel time. Resorcinol-formaldehyde airgel prepared after 35 min. The specific surface area of ​​resorcinol-formaldehyde airgel is 433m 2 / g, the total pore volume is 4.77cm 3 / g, the average pore diameter is 2.996nm.

Embodiment 2

[0026] Embodiment 2 Utilizes ultraviolet photoinitiation method to prepare resorcinol formaldehyde airgel

[0027] According to the preparation process of the resorcinol-formaldehyde airgel described in Example 1, the difference is that the water bath storage time in the parameters is 40 minutes, and the resorcinol-formaldehyde airgel is prepared in 15 minutes. The prepared resorcinol formaldehyde airgel has a specific surface area of ​​294m 2 / g, the total pore volume is 2.502cm 3 / g, the average pore diameter is 2.384nm. figure 1 It is the scanning electron microscope image of the sample. It can be seen from the figure that the RF prepared by the ultraviolet photoinitiation method has a certain network structure and a certain pore structure. figure 2 As the adsorption-desorption curve of the sample, the specific surface area, total pore volume and average pore diameter can be calculated with the adsorption software. image 3 It is the infrared spectrum curve of the sampl...

Embodiment 3

[0028] Example 3 Preparation of resorcinol-formaldehyde aerogel by ultraviolet light initiation method

[0029] Referring to the preparation process of the resorcinol-formaldehyde airgel described in Example 1, the difference is that the water bath standing time in the parameters is 50 minutes. Resorcinol-formaldehyde airgel prepared in 25 minutes. The specific surface area of ​​resorcinol-formaldehyde airgel is 260m 2 / g, total pore volume 2.370m 3 / g, the average pore diameter is 3.996nm.

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Abstract

The invention provides a method for preparing resorcinol-formaldehyde aerogel. The preparation method comprises the following steps: adding a certain amount of water-soluble and neutral light initiator to a reaction of base catalysis of resorcinol-formaldehyde aerogel, and synthesizing organic aerogel under ultraviolet light irradiation. The method has the characteristics that by virtue of the selected water-soluble and neutral light initiator, the structure of the organic aerogel is not greatly changed due to introduction of the light initiator besides that the gelation time of a resorcinol-formaldehyde solution can be greatly shortened. The resorcinol-formaldehyde aerogel and a derivative, carbon aerogel, thereof prepared by the method disclosed by the invention can be applied to related fields of a laser inertial confinement fusion target material, a supercapacitor electrode material, a lithium battery electrode material, a hydrogen storage material, a thermal insulation material, other composite nano materials and the like.

Description

technical field [0001] The invention belongs to the field of airgel preparation, and in particular relates to a preparation method of resorcinol-formaldehyde airgel. Background technique [0002] Resorcinol-formaldehyde airgel has the characteristics of nano-scale porous network structure, high specific surface area, adjustable pore structure, adjustable density in a wide range, radiation resistance, and transparency, so that it can be used in laser inertial confinement fusion targets. Materials, supercapacitor electrode materials, lithium battery electrode materials, hydrogen storage materials, heat insulation materials and other related fields have a wide range of applications. [0003] At present, the preparation method of resorcinol-formaldehyde airgel is mainly sol-gel method. The biggest problem of preparing resorcinol-formaldehyde airgel with this method is that it needs a long preparation time. Usually it takes 3-5 days to gel by using this method, which limits the...

Claims

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Application Information

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IPC IPC(8): B01J13/00
Inventor 付志兵王朝阳雷蕾唐永建杨曦袁磊焦兴利张厚琼
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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