Preparation method of Ca1-XSi2O2N2:EuX fluorescent fiber membrane with hollow structure
A technology for fluorescent fibers and fiber membranes, which is used in fiber processing, heating/cooling fabrics, textiles, and papermaking, etc., and can solve the problems of inability to continuously prepare a large number of hollow fibers, limited preparation methods, and complex spinning parameters.
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Embodiment 1
[0029] Take 1mL of ultrapure water, 18mL of absolute ethanol and 1mL of DMF and mix; dissolve 0.0196g of europium nitrate and 0.3978g of calcium nitrate in the mixed solvent, and then add 0.69mL of TEOS. After continuous stirring for 30 min, slowly add 0.9 g PVP (molecular weight 50,000) and 2.4 g PVP (molecular weight 1,300,000) under high-speed stirring, and continue stirring for 6 h, the solution is clear and transparent.
[0030] The obtained precursor solution was subjected to electrospinning: at room temperature, the humidity was controlled at 30%, the spinning voltage was set to 6kv, the propulsion speed of the propulsion pump was 0.2mL / h, and the receiving distance was 10cm.
[0031] The as-spun fibers obtained above were calcined in an air atmosphere with a heating rate of 0.8°C / min and a calcining temperature of 500°C. After 4 hours of heat preservation, the temperature was naturally lowered to obtain a Ca-Si-O-Eu fiber membrane with a hollow structure.
[0032] The ...
Embodiment 2
[0034]Mix 1.5mL ultrapure water, 17mL absolute ethanol and 1.5mL DMF; dissolve 0.0429g europium nitrate and 0.6852g calcium nitrate in the mixed solvent, and then add 1.08mL TEOS. After stirring continuously for 30 min, slowly add 1.1 g PVP (molecular weight 50,000) and 2 g PVP (molecular weight 1,300,000) under high-speed stirring, and continue stirring for 6 h, the solution is clear and transparent.
[0035] The obtained precursor solution was subjected to electrospinning: at room temperature, the humidity was controlled at 20%, the spinning voltage was set to 8kv, the propulsion speed of the propulsion pump was 0.8mL / h, and the receiving distance was 14cm.
[0036] The as-spun fibers obtained above were calcined in an air atmosphere with a heating rate of 1°C / min and a calcination temperature of 550°C. After holding for 3 hours, the temperature was naturally lowered to obtain a Ca-Si-O-Eu fiber membrane with a hollow structure.
[0037] Transfer the calcined fiber membrane ...
Embodiment 3
[0039] Mix 2mL of ultrapure water, 16mL of absolute ethanol and 2mL of DMF; dissolve 0.1018g of europium nitrate and 0.9847g of calcium nitrate in the mixed solvent, and then add 1.45mL of TEOS. After continuous stirring for 30 min, 1.3 g of PVP (molecular weight 50,000) and 1.7 g of PVP (molecular weight 1,300,000) were slowly added under high-speed stirring, and stirring was continued for 6 h, and the solution was clear and transparent.
[0040] The obtained precursor solution was subjected to electrospinning: at room temperature, the humidity was controlled at 10%, the spinning voltage was set to 12kv, the propulsion speed of the propulsion pump was 1.5mL / h, and the receiving distance was 18cm.
[0041] The as-spun fibers obtained above were calcined in an air atmosphere with a heating rate of 1.5°C / min and a calcination temperature of 600°C. After holding for 2 hours, the temperature was naturally lowered to obtain a Ca-Si-O-Eu fiber membrane with a hollow structure.
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