Method for preparing mullite nanofiber by electrospun two-phase precursors
A mullite fiber and nanofiber technology, applied in fiber processing, electrospinning, and fiber chemical characteristics, can solve problems such as poor high-temperature performance and poor density, and achieve reduced sintering weight loss, reduced additives, and molecular weight Improved effect
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Embodiment 1
[0022] With polymethylsiloxane (MK resin, Mw=9100g mol -1 , Wacker Chemie AG) as a silicon source, aluminum sec-butoxide as an aluminum source, prepare mullite nanofiber samples, the steps are as follows:
[0023] (1) Dissolve 0.21g of MK resin in 1g of isopropanol and stir evenly with a magnetic stirrer until the MK resin is completely dissolved to obtain solution A.
[0024] (2) Dissolve 2.1 g of aluminum sec-butoxide in 5 g of isopropanol, stir well at room temperature to form a homogeneous solution, and obtain solution B.
[0025] (3) Stir solution A and solution B into a uniform solution to obtain solution C;
[0026] (4) 1.12 g of PVP was dissolved in 5 g of isopropanol, and 1 g of DMF was added as an organic co-solvent, stirred evenly with a magnetic stirrer until the solution was clear, and a PVP solution with a certain viscosity was prepared.
[0027] (5) Slowly add the PVP solution in (4) to solution C, and slowly stir with a magnetic stirrer during the addition pr...
Embodiment 2
[0030] With polymethyl hydrogen siloxane (PHMS, Mw=1900g mol -1 , the following examples of Alfa Aesar are the same) as the silicon source, and aluminum sec-butoxide is the aluminum source to prepare mullite nanofibers, the steps are as follows:
[0031] (1) Dissolve 0.11g of PHMS in 1g of isopropanol and stir evenly with a magnetic stirrer to obtain solution A.
[0032] (2) Dissolve 2.1 g of aluminum sec-butoxide in 5 g of isopropanol, and fully stir at room temperature to form a homogeneous solution to obtain solution B.
[0033] (3) Solution A and solution B are stirred into uniform solution C;
[0034] (4) Dissolve 1.5g of PVP in 5g of isopropanol, and add, for example, 1g of DMF as an organic solvent, stir evenly with a magnetic stirrer until the solution is clear, and prepare PVP solutions with different viscosities.
[0035] (5) Slowly add the PVP solution in (4) to solution C, and slowly stir with a magnetic stirrer during the addition process, and continue to stir f...
Embodiment 3
[0038] With polymethyl hydrogen siloxane (PHMS) as a silicon source, aluminum sec-butoxide as an aluminum source, prepare mullite nanofibers, the steps are as follows:
[0039] (1) Dissolve 0.17g of PHMS in 1g of isopropanol and stir evenly with a magnetic stirrer to obtain solution A.
[0040] (2) Dissolve 2.1 g of aluminum sec-butoxide in 5 g of isopropanol, and fully stir at room temperature to form a homogeneous solution to obtain solution B.
[0041] (3) Solution A and solution B are stirred into uniform solution C;
[0042] (4) Dissolve 1.51g of PVP in 5g of isopropanol, and add, for example, 1g of DMF as an organic solvent, stir evenly with a magnetic stirrer until the solution is clear, and prepare PVP solutions with different viscosities.
[0043] (5) Slowly add the PVP solution in (4) to solution C, and slowly stir with a magnetic stirrer during the addition process, and continue to stir for a period of time after becoming a uniform solution to make the solution ful...
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