A kind of polylactic acid porous film and preparation method thereof
A technology of porous film and polylactic acid, applied in the direction of separation method, rayon manufacturing, single-component polyester rayon, etc., can solve the problems of poor purification treatment effect, small oil absorption of the film, complicated process, etc., and achieve oil absorption The effect of large size, low preparation cost and simple process
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[0023] A kind of preparation method of polylactic acid porous film provided by the embodiment of the present invention, it comprises:
[0024] S1. Dichloromethane and N,N-dimethylformamide are prepared into a mixed solvent according to the volume ratio of 8-9:0.5-1.5.
[0025] It should be noted that the reason why the embodiment of the present invention limits the composition of the mixed solvent is that it is prepared by mixing dichloromethane and N,N-dimethylformamide according to the volume ratio of 8-9:0.5-1.5 The mixed solvent is very beneficial to the dissolution of polylactic acid, thus contributing to the formation of the first mixed solution with a mass fraction of 6-12% in step 2 (S2).
[0026] It should be emphasized that, in the embodiment of the present invention, preferably, when preparing the mixed solvent, the volume ratio of dichloromethane and N,N-dimethylformamide is 9:1.
[0027] S2. Add polylactic acid into the mixed solvent to form a first mixed solutio...
Embodiment 1
[0041] The present embodiment provides a kind of preparation method of polylactic acid porous film, it comprises:
[0042] First, dichloromethane and N,N-dimethylformamide are formulated into a mixed solvent at a volume ratio of 9:1, and then polylactic acid is added to the mixed solvent to form a first mixed solution with a mass fraction of polylactic acid of 10%. .
[0043] Next, 0.15 g of iron oxide was dissolved in 1.0 mL of glycine to form a second mixed solution.
[0044] Further, the first mixed solution and the second mixed solution are mixed to obtain a third mixed solution, wherein the specific mixing process includes: adding the first mixed solution and the second mixed solution together for shaking, and then performing 1 h of ultrasonic treatment.
[0045] Finally, the third mixed solution was used as a precursor solution for electrospinning, and an electrospinning machine was used to perform electrospinning, wherein the electrostatic voltage was 15.65 kV.
[00...
Embodiment 2
[0048] The present embodiment provides a kind of preparation method of polylactic acid porous film, it comprises:
[0049]First, dichloromethane and N,N-dimethylformamide are formulated into a mixed solvent at a volume ratio of 9:1, and then polylactic acid is added to the mixed solvent to form a first mixed solution with a mass fraction of polylactic acid of 10%. .
[0050] Next, 0.15 g of iron oxide was dissolved in 0.5 mL of glycine to form a second mixed solution.
[0051] Further, the first mixed solution and the second mixed solution are mixed to obtain a third mixed solution, wherein the specific mixing process includes: adding the first mixed solution and the second mixed solution together for shaking, and then performing 1 h of ultrasonic treatment.
[0052] Finally, the third mixed solution was used as a precursor solution for electrospinning, and an electrospinning machine was used to perform electrospinning, wherein the electrostatic voltage was 15.65 kV.
[005...
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Abstract
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