A preparation method of self-twisting helical and twisted micro-nano fibers
A technology of micro-nano fiber and twisted helix, which is applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of thick fiber diameter, poor fiber structure performance, complex preparation process, etc., and achieve small diameter, low cost, The effect of simple process
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specific Embodiment 1
[0033] A method for preparing self-twisting helical and twisted micro-nano fibers, comprising the following steps:
[0034] Step 1: Take anhydrous formic acid and deionized water to configure a formic acid solvent with a concentration of 88%;
[0035] Step 2: Put 2g of PA6 nylon powder into 8g of formic acid solvent (88%), and stir it with a magnetic stirrer at a temperature of 25°C for 1 hour until the nylon powder is completely dissolved to form a 20% uniform and stable nylon spinning solution;
[0036] Step 3: Add the above-mentioned nylon spinning solution into the syringe 7, set the propulsion speed of the propulsion motor 8 to 0.1ml / h, and the distance between the spinning nozzle 6 and the upper surface of the second receiving plate 4 to be 120 mm; the metal needle 1 The number of the metal needle 1 is 1, and the structure of the metal needle 1 is a cylindrical flat-headed metal needle. The metal needle 1 exposes 1mm on the upper surface of the second receiving plate 4, an...
specific Embodiment 2
[0037] A method for preparing self-twisting helical and twisted micro-nano fibers, comprising the following steps:
[0038] Step 1: Take anhydrous formic acid and deionized water to configure a formic acid solvent with a concentration of 88%;
[0039] Step 2: Put 3g of PA6 nylon powder into 7g of formic acid solvent (88%), and stir it with a magnetic stirrer for 2 hours at a temperature of 25°C until the nylon powder is completely dissolved to form a 30% uniform and stable nylon spinning solution;
[0040] Step 3: Add the above-mentioned nylon spinning solution into the syringe 7, set the propulsion speed of the propulsion motor 8 to 0.5ml / h, and the distance between the spinning nozzle 6 and the upper surface of the second receiving plate 4 to be 120 mm; the metal needle 1 The number of metal needles is 3, and the structure of the metal needle 1 is a conical metal needle with the top of the cone upward. The three metal needles 1 are arranged in an equilateral triangle when vi...
specific Embodiment 3
[0041] A method for preparing self-twisting helical and twisted micro-nano fibers, comprising the following steps:
[0042] Step 1: Take anhydrous formic acid and deionized water to configure a formic acid solvent with a concentration of 90%;
[0043] Step 2: Put 1.8g of PA6 nylon powder into 8.2g of formic acid solvent (90%), and stir for 1.5 hours with a magnetic stirrer at a temperature of 25°C until the nylon powder is completely dissolved to form an 18% uniform and stable nylon spinning solution ;
[0044] Step 3: Add the above-mentioned nylon spinning solution into the syringe 7, set the propulsion speed of the propulsion motor 8 to 4ml / h, and the distance between the spinning nozzle 6 and the upper surface of the second receiving plate 4 to be 150mm; The number is 6, and the structure of the metal needle 1 is a conical metal needle with the top of the cone upward. The 6 metal needles 1 are arranged in a circle when viewed from above. Expose the upper surface of the se...
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