A kind of electrospun aramid fiber 1313 nanofiber/polylactic acid composite material and preparation method thereof
A technology of nanofibers and composite materials, applied in fiber processing, chemical instruments and methods, filament/wire forming, etc., to achieve excellent mechanical properties, easy access to raw materials, and light weight
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Embodiment 1
[0031] Weigh a certain amount of anhydrous LiCl, dry it in vacuum at 120°C for 2 hours, then add it to DMAc to form a LiCl / DMAc solution system, weigh a certain amount of aramid 1313 fiber, add it to the LiCl / DMAc solution system, and heat it at 120°C Dissolve into a transparent solution under stirring, wherein the mass fraction of aramid fiber 1313 is 11%, and the mass fraction of LiCl is 7%;
[0032] At the spinning voltage of 26kv, the inner diameter of the spinneret is 0.85mm, the flow rate of the spinning solution is 0.45ml / h, the speed of the collecting roller is 9m / min, the lateral movement speed of the spinneret is 16cm / min, the spinning distance is 15cm, and the spinning time is 18h Spinning is carried out under the condition of , and the aramid fiber 1313 nanometer fiber felt of fiber alignment is prepared;
[0033] See attached figure 1 A, the fibers in the above-mentioned two pieces of orientation alignment aramid 1313 nanofiber membranes are staggered at 90°, the...
Embodiment 2
[0036] Weigh a certain amount of anhydrous LiCl, dry it in vacuum at 120°C for 3 hours, then add it to DMAc to form a LiCl / DMAc solution system, weigh a certain amount of aramid fiber 1313, add it to the LiCl / DMAc solution system, and heat it at 100°C Dissolve into a transparent solution under stirring, wherein the mass fraction of aramid 1313 is 14%, and the mass fraction of LiCl is 5%;
[0037] At a spinning voltage of 24kv, the inner diameter of the spinneret is 0.85mm, the flow rate of the spinning solution is 0.3ml / h, the speed of the collecting roll is 8m / min, the lateral movement speed of the spinneret is 20cm / min, the spinning distance is 13cm, and the spinning time is 14h Spinning is carried out under the condition of , and the aramid fiber 1313 nanometer fiber felt of fiber alignment is prepared;
[0038] See attached figure 1 B, the fibers in the above-mentioned two pieces of orientation alignment aramid 1313 nanofiber membranes are staggered at 45°, then immersed ...
Embodiment 3
[0043] Weigh a certain amount of anhydrous LiCl, dry it in vacuum at 110°C for 4 hours, then add it to DMAc to form a LiCl / DMAc solution system, weigh a certain amount of aramid 1313 fiber, add it to the LiCl / DMAc solution system, and heat it at 110°C Dissolve into a transparent solution under stirring, wherein the mass fraction of aramid fiber 1313 is 10%, and the mass fraction of LiCl is 7%;
[0044] At the spinning voltage of 25kv, the inner diameter of the spinneret is 0.85mm, the flow rate of the spinning solution is 0.35ml / h, the speed of the collecting roller is 7m / min, the lateral movement speed of the spinneret is 18cm / min, the spinning distance is 13cm, and the spinning time is 16h Spinning is carried out under the condition of , and the aramid fiber 1313 nanometer fiber felt of fiber alignment is prepared;
[0045] See attached figure 1 B, the fibers in the above-mentioned two pieces of orientation aligned aramid 1313 nanofiber membranes are staggered at 45°, then ...
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