Chitosan and polyvinyl pyrrolidone (PVP) blended fiber and preparation method thereof
A technology of blending fiber and chitosan, which is applied in the direction of fiber chemical characteristics, wet spinning method, conjugated artificial filament, etc., can solve the problems of unstable fiber characteristics, the amount of polluted three wastes, and volatile solvents, etc., to achieve Improve the spinnability and fiber mechanical properties, the fiber is safe and non-toxic, and the raw materials are easy to obtain
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Embodiment 1
[0024] ① Preparation of blended spinning solution: Dissolve 0.9 g of [Gly]Cl ionic liquid in 29.1 g of deionized water to prepare 30 g of an ionic liquid aqueous solution with a mass fraction of 3%, add 1.8 g of chitosan and 0.3 g of PVP to the above-mentioned In the ionic liquid solution, fully stir and dissolve at 30°C for 8 hours;
[0025] ② Preparation of chitosan / PVP blended fiber: inject the blended spinning solution into the syringe of the wet spinning machine, and spin the fiber at a temperature of 30°C. The mixed solution of 5wt% sodium sulfate solution and absolute ethanol with a volume ratio of 1:1 is a coagulation bath, after a certain stretch, washed with water for 10 minutes, and naturally dried in the air to form fibers;
[0026] figure 1 It is the SEM photo of the fiber cross-section. It can be seen that the fiber cross-section is smooth, indicating that chitosan and PVP have good compatibility. The resulting fiber breaking strength was 1.81cN / dtex, using Lai...
Embodiment 2
[0030] ① Preparation of blended spinning solution: 0.9 g of [Gly]Cl ionic liquid was dissolved in 29.1 g of deionized water to prepare 30 g of 3% ionic liquid aqueous solution, and 1.65 g of chitosan and 0.45 g of PVP were added to the In the liquid solution, fully stir and dissolve at 30°C for 8 hours;
[0031] ② Preparation of chitosan / PVP blended fiber: as in Example 1. The performance parameters of the product obtained are shown in Table 1.
Embodiment 3
[0033] ①Preparation of blended spinning solution: 0.9 g of homemade [Gly]Cl ionic liquid was dissolved in 29.1 g of deionized water to prepare 30 g of ionic liquid aqueous solution with a mass fraction of 3%, and 1.5 g of chitosan and 0.6 g of PVP were respectively Add to the ionic liquid solution, fully stir and dissolve at 30°C for about 8 hours;
[0034] ② Preparation of chitosan / PVP blended fiber: as in Example 1. The performance parameters of the product obtained are shown in Table 1.
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