Wet spun fibers, wet formed film, and production method therefor
A technology of wet spinning and manufacturing method, which is applied in the field of wet manufacturing of nano-film to achieve the effect of improving mechanical strength
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Embodiment 1
[0203] [Example 1] polyamic acid fiber
[0204] Under the conditions shown in Table 2, prepare the solutions of the inner phase and the outer phase respectively, and use the designated casing type micro-nozzle device for wet spinning fibers to make wet spinning fibers (polyamic acid fibers) formed by polyamic acid ). As the polyamic acid, use the polyamic acid represented by the structural formula (poly(pyromellitic dianhydride-co- -4,4'-diaminodiphenyl ether), amic acid solution, 15-16wt% N-methyl-2-pyrrolidone solution, manufactured by Sigma Aldrich).
[0205] exist figure 2 [A] shows SEM photographs of samples 1-10 in Table 2. Under these conditions, polyamic acid fibers having an average diameter (fiber diameter) of about 3 μm were obtained.
[0206] exist figure 2 [B] shows the flow ratio (external phase flow / internal phase flow rate) calculated from the internal phase flow rate and external phase flow rate shown in Table 2, and the fiber diameter and bidirectional...
Embodiment 2
[0210] [Example 2] Polyethylene terephthalate (PET) fiber
[0211] Solutions of the inner phase and the outer phase were prepared under the conditions shown in Table 3, and wet-spun fibers (PET fibers) made of PET were produced using a designated sleeve-type micro-nozzle device for wet-spun fibers. In addition, the PET shown in an Example is a commercial item manufactured by Sigma Aldrich (Mw: 130,000).
[0212] exist image 3 [A] shows SEM photographs of samples 2-4 in Table 3. Under these conditions, PET fibers having an average diameter (fiber diameter) of about 1.5 μm were obtained.
[0213] exist image 3 [B] shows the flow rate ratio (outer phase flow rate / inner phase flow rate) calculated from the inner phase flow rate and the outer phase flow rate shown in Table 3, and the fiber diameter and birefringence index of each sample of PET fiber obtained under the conditions . according to image 3 [B] As in Example 1, as the flow ratio increases, the fiber diameter of ...
Embodiment 3
[0217] [Example 3] Cellulose acetate fiber
[0218] Under the conditions shown in Table 4, the solutions of the inner phase and the outer phase were prepared respectively, and the wet-spun fibers (cellulose acetate fibers ). In addition, the degree of substitution of cellulose acetate used in the examples was 5 wt%.
[0219] exist Figure 4 [A] shows the SEM photograph of sample 3-3 in Table 4. Under these conditions, cellulose acetate fibers having an average diameter (fiber diameter) of about 2 μm can be obtained.
[0220] exist Figure 4 [B] shows the flow rate ratio (outer phase flow rate / inner phase flow rate) calculated from the inner phase flow rate and the outer phase flow rate shown in Table 4, and the fiber diameter and bidirectional ratio of each sample of cellulose acetate fibers obtained under the conditions. refractive index. according to Figure 4 [B] As in Example 1, etc., as the flow ratio increases, the diameter of the obtained cellulose acetate fiber ...
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