Temperature-adjusting and anti-fouling fiber membrane and temperature-adjusting anti-fouling and breathable double-layer fiber membrane based on same
A technology of fiber membrane and temperature adjustment, which is applied in fiber treatment, coating, textiles and papermaking, etc., can solve the problems of restricting the application and development of anti-fouling and breathable fabrics, complex processing technology of anti-fouling and breathable membranes, and high technical and equipment requirements. Achieve fast solar-thermal energy conversion/storage, increase absorption and conversion efficiency, and controllable preparation conditions
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Embodiment 1
[0039] Step 1. At room temperature, weigh 0.88g of PVDF powder and add it to 8g of DMF, heat and stir at 60°C for 2h, and let stand for 10min for defoaming to obtain a DMF solution with a mass concentration of 10wt% PVDF.
[0040] Step 2. Inject the DMF solution of PVDF obtained in step 1 into a 10mL syringe as the pre-spinning body fluid. The syringe is connected to a single-axis needle and placed in an electrospinning device. On the needle head, the aluminum foil receiving device is grounded) for electrospinning to prepare a hydrophobic PVDF nanofiber membrane. The electrospinning conditions were as follows: the spinning voltage was 14 kV, the feed rate of the solution injection pump was 25 μL / min, the distance between the needle and the receiving device was 15 cm, and the drum rotation speed was 500±10 rpm.
[0041] After testing, the PVDF nanofiber membrane obtained in this example has a contact angle of 128.4° and a water vapor transmission rate of 11.3kg m -2 d -1 (12....
Embodiment 2
[0043] Step 1. At room temperature, weigh 0.88g of PVDF powder and add it to 8g of DMF, heat and stir at 60°C for 2h, and let stand for 10min for defoaming to obtain a DMF solution with a mass concentration of 10wt% PVDF. Then 0.088g photothermal conversion material Cu 7 S 4 The powder was slowly added to the above clear solution, stirred at room temperature for 12 hours, so that it could be evenly dispersed in the solution, and after standing for defoaming, Cu 7 S 4 A homogeneous solution with a mass ratio of 0.1:1 to PVDF.
[0044] Step 2. Inject the uniform solution obtained in step 1 into a 10mL syringe as the pre-spinning body fluid. The syringe is connected to a single-axis needle and placed in an electrospinning device. , the aluminum foil receiving device is grounded) for electrospinning to produce hydrophobic PVDF / Cu 7 S 4 (1:0.1) nanofibrous membrane. The electrospinning conditions were as follows: the spinning voltage was 14 kV, the feed rate of the solution i...
Embodiment 3
[0047] Step 1. At room temperature, weigh 0.88g of PVDF powder and add it to 8g of DMF, heat and stir at 60°C for 2h, and let stand for 10min for defoaming to obtain a DMF solution with a mass concentration of 10wt% PVDF. Then 0.132g photothermal conversion material Cu 7 S 4 The powder was slowly added to the above clear solution, stirred at room temperature for 12 hours, so that it could be evenly dispersed in the solution, and after standing for defoaming, Cu 7 S 4 A homogeneous solution with a mass ratio of 0.15:1 to PVDF.
[0048] Step 2. Inject the uniform solution obtained in step 1 into a 10mL syringe as the pre-spinning body fluid. The syringe is connected to a single-axis needle and placed in an electrospinning device. , the aluminum foil receiving device is grounded) for electrospinning to produce hydrophobic PVDF / Cu 7 S 4 (1:0.15) nanofibrous membrane. The electrospinning conditions were as follows: the spinning voltage was 14 kV, the feed rate of the solution...
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