A kind of ultra-light elastic inorganic oxide fiber airgel and preparation method thereof
A technology of inorganic oxides and aerogels, applied in the field of aerogels, can solve problems such as structural stability or high-temperature heat insulation effects, large diameters of inorganic fibers or polymer fibers, high energy consumption costs and equipment requirements, etc. Achieve the effect of excellent mechanical properties, excellent mechanical properties, and good mechanical properties
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Embodiment 1
[0065] Ultralight Elastic SiO 2 -TiO 2 Preparation of fiber airgel
[0066] According to the mass ratio, polyvinylpyrrolidone: acetic acid: inorganic ester: ethanol = 1.8:2:6:10 raw material preparation, wherein the inorganic ester is a mixture formed by tetrabutyl titanate and tetrabutyl titanate in a mass ratio of 5:1 ; Mix polyvinylpyrrolidone, acetic acid and ethanol solvent, stir magnetically for 10-20min until the PVP is completely dissolved and uniform, add inorganic ester, stir magnetically at the same speed for 72h, and obtain a uniform electrospinning solution;
[0067] The above electrospinning solution was added into a syringe, and the syringe was connected to a dispensing needle with an inner diameter of 1.2 mm and connected to the positive electrode of a high-voltage power supply. Select a conductive plate as the receiver, connect it to the negative pole of the high-voltage power supply, and the distance from the dispensing needle to the receiver is 30cm. The ...
Embodiment 2
[0070] Ultralight Elastic Elastic SiO 2 -TiO 2 Preparation of fiber airgel
[0071] According to the mass ratio, polyvinylpyrrolidone: acetic acid: inorganic ester: ethanol = 2:2:6:10 raw material preparation, wherein, the inorganic ester is a mixture formed by ethyl orthosilicate and tetrabutyl titanate in a mass ratio of 2:1 ; Mix polyvinylpyrrolidone, acetic acid and ethanol solvent, stir magnetically for 10-20min until the PVP is completely dissolved and uniform, then add inorganic ester, stir magnetically for 24h at the same speed to obtain a uniform electrospinning solution;
[0072] Add the above-mentioned electrospinning solution into the injection, and the syringe is connected to a dispensing needle with an inner diameter of 1.2mm, and connected to the positive electrode of the high-voltage power supply. Select a conductive plate as the receiver, connect it to the negative pole of the high-voltage power supply, and the distance from the dispensing needle to the rece...
Embodiment 3
[0074] Ultralight Elastic Elastic SiO 2 -TiO 2 Preparation of fiber airgel
[0075] This example is the same as Example 1, the difference is that ethyl orthosilicate is replaced by methyl orthosilicate, and the rest of the conditions remain unchanged to obtain ultra-light elastic SiO 2 -TiO 2 Airgel materials, scanning electron microscope photos such as Figure 8 As shown, the nitrogen adsorption diagram is shown in Figure 9 As shown, the pore size distribution is shown in Figure 10 shown. The airgel has a density of 5.2 mg / cm 3 , the porosity is 97%, and the specific surface area is 392m 2 / g, the fiber diameter is about 1300-1700nm, the micropore diameter inside the fiber of the airgel is 0.4nm; the mesopore diameter is 28nm; the macropore diameter is 100-200nm; the macropore diameter between the fibers is 800- 1800nm.
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