Aerogelmodified polymer fiber, wet spinning method thereof, and fabric woven by using aerogelmodified polymer fiber
A wet spinning and polymer technology, applied in the direction of single-component synthetic polymer rayon, single-component cellulose rayon, wet spinning, etc., can solve the problem of airgel modified polymer fiber density reduction Insufficient improvement of thermal insulation performance and other problems, to achieve the effect of complete pore structure, structural size protection, and increased airgel content
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[0027] Different from the preparation process of the traditional airgel modified fiber, the present invention adopts the wet spinning method to prepare the airgel modified polymer fiber, and the airgel, the polymer and the solvent used to dissolve the polymer The spinning dope was prepared by mixing, and then the airgel modified polymer fiber was prepared by wet spinning. In the above method, the solvent can be used to dissolve the polymer to form a polymer solution, and the airgel can be dispersed in the polymer solution as a dispersed phase to form a relatively stable spinning dope. Under the dispersion of the polymer solution, the addition amount of the airgel can be significantly increased, and the structural size of the airgel is also better protected under the action of the solvent. For the above reasons, the airgel content in the fiber is increased, and the pore structure is relatively complete, so that the airgel modified fiber prepared by the present invention has low...
Embodiment 1
[0053] Preparation of airgel modified PAN fiber:
[0054] Add dry PAN, dimethylacetamide, and airgel (the mass ratio of airgel to PAN is 3:97, the particle size of airgel is 1-20 μm, and the porosity is 40-60%) arrive figure 1 with 2 In the mixing device shown, dissolve and mix at 75°C under normal pressure, and make an airgel modification solution with a PAN concentration of 24% (the speed of the stirring assembly during the mixing process is 500r / min, and the mixing time is 60min , the angle of the paddle relative to the rotating shaft is 15-30°); the airgel modified solution is further filtered and defoamed to obtain the airgel modified spinning stock solution; the modified spinning stock solution is passed through PAN conventional wet spinning, The airgel modified PAN fiber was prepared in the post-processing procedure with a density of 0.947g / cm 3 ; The airgel-modified PAN fiber undergoes conventional post-treatment and weaving procedures to obtain an airgel-modified P...
Embodiment 2
[0056] The raw materials and preparation process are the same as in Example 1, except that the mass ratio of airgel to PAN is 2.2:97.8.
[0057] The resulting fiber has a density of 1.010 g / cm 3 , the thermal conductivity of the fabric is 0.028W / (m·K).
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