A method for preparing mullite nanofibers from electrospinning biphasic precursors
A nanofiber and mullite technology, applied in the direction of electrospinning, fiber treatment, fiber chemical characteristics, etc., can solve the problems of poor high temperature performance, poor density, etc., to reduce sintering weight loss, reduce additives, improve mechanical properties performance 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 to make the solution fully mixed after becoming a uniform ...
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