Chitin-containing polyester filament and preparation method thereof
A chitin-containing polyester filament and a preparation method of the chitin-containing polyester filament are provided. The method includes preparing a modified chitin; preparing a chitin-containing functional modifier based on the modified chitin; preparing polyester (PET) functional particles based on the chitin-containing functional modifier and PET pellets; preparing a mixed spinning solution based on the polyester functional particles, where a weight percentage of the polyester functional particles is in a range of approximately 2%-4% based on a total weight of the mixed spinning solution; and performing a spinning molding of the mixed spinning solution to form the chitin-containing polyester filament.
1. A preparation method of a chitin-containing polyester filament, comprising:
preparing a modified chitin;
preparing a chitin-containing functional modifier based on the modified chitin;
preparing polyester (PET) functional particles based on the chitin-containing functional modifier and PET pellets;
preparing a mixed spinning solution based on the polyester functional particles, wherein a weight percentage of the polyester functional particles is in a range of approximately 2%-4% based on a total weight of the mixed spinning solution; and
performing a spinning molding of the mixed spinning solution to form the chitin-containing polyester filament.
2. The method according to claim 1 , wherein:
the mixed spinning solution further includes an accelerator, wherein:
a weight percentage of the added accelerator is in a range of approximately 3%-6% based on the total weight of the mixed spinning solution, and
the accelerator includes amino silicone oil and n-butyl titanate in a mixing ratio of approximately (0.25-0.40):1.
3. The method according to claim 2 , wherein:
the mixed spinning solution further includes ordinary polyester chips.
4. The method according to claim 1 , wherein preparing the polyester functional particles includes:
adding the chitin-containing functional modifier, the PET pellets, titanium dioxide, sodium carboxymethyl cellulose, and diisopropyl trisulfide into a mixer for stirring and granulation, wherein the stirring process includes a speed in a range of approximately 1000 rpm-1200 rpm, and a duration in a range of approximately 60 minutes-90 minutes.
5. The method according to claim 4 , wherein:
a diameter of a polyester functional particle is in a range of approximately 1 mm-2 mm, and
the polyester functional particle includes following raw material components calculated in parts by weight: 50-60 parts of the PET pellets, 20-25 parts of the chitin-containing functional modifier, 3-6 parts of titanium dioxide, 6-12 parts of sodium carboxymethyl cellulose, and 6-12 parts of diisopropyl trisulfide.
6. The method according to claim 1 , wherein parameters of the spinning molding process include:
a first hot rolling temperature in a range of approximately 168° C.-175° C., for a first drawing rate in a range of approximately 1200 m/min-1250 m/min;
a second hot rolling temperature in a range of approximately 85° C.-90° C., for a second drawing rate in a range of approximately 3680 m/min-3700 m/min; and
a winding speed in a range of approximately 1560 m/min-1860 m/min.
7. The method according to claim 6 , wherein parameters of the spinning molding process further include:
an extrusion temperature of melt spinning in a range of approximately 250° C.-265° C.,
an initial pressure of approximately 8 MPa, and
a molding temperature in a range of approximately 120° C.-130° C.
8. The method according to claim 1 , wherein preparing the modified chitin includes:
a deacetylation process, an amination modification process, and a separation and purification process.
9. The method according to claim 8 , wherein:
in the deacetylation process, an amino groups-containing chitosan suspension is produced, wherein:
an alkaline solution includes a sodium hydroxide solution and a potassium hydroxide solution each having a weight percentage in a range of approximately 40%-45% mixed in equal proportions,
a weight percentage of chitin is in a range of approximately 1/20- 1/25 based on a total weight of the mixed alkaline solution to form the amino groups-containing chitosan suspension, and
a deacetylation degree of the chitosan in the amino groups-containing chitosan suspension is in a range of approximately 80%-92%.
10. The method according to claim 9 , wherein:
in the amination modification process, hydroxypropyl trimethyl ammonium nitride and a catalyst are added into the amino groups-containing chitosan suspension, to form a quaternary ammonium salt solution, wherein:
a weight of the added hydroxypropyl trimethyl ammonium nitride is approximately 0.50-0.58 times of a weight of the chitin, and
the catalyst includes zinc phosphomolybdate, and a weight percentage of the catalyst is in a range of approximately 0.11%-0.32% in a catalyst solution.
11. The method according to claim 10 , wherein:
in the separation and purification process, acetone is slowly added dropwise to the quaternary ammonium salt solution, wherein:
a volume ratio of the dripped acetone over the quaternary ammonium salt solution is in a range of approximately 1:(3-4).
12. The method according to claim 1 , wherein:
in preparation of the chitin-containing functional modifier, a solvent is triethyl citrate.
13. The method according to claim 12 , wherein preparing the chitin-containing functional modifier includes:
dissolving the modified chitin in the solvent to form a triethyl citrate solution, and
sequentially adding diatomite, porogen and precipitant into the triethyl citrate solution.
14. The method according to claim 13 , wherein:
a mass ratio of the modified chitin over the diatomite is in a range of approximately (3.2-5.0): 1.
15. The method according to claim 13 , wherein:
the porogen includes one of CaCl 2 ), MgCl 2 and NaCl, and
a weight percentage of the porogen is in a range of approximately 1.2%-2.8% based on a total weight of the chitin-containing functional modifier.
16. The method according to claim 13 , wherein:
the precipitant is ethylene-vinyl acetate (EVA), wherein a weight percentage of vinyl acetate is in a range of approximately 25%-28.5%,
a melt index of the precipitant is in a range of approximately (22 g-24 g)/10 min at 190° C. for 2.15 kg, and
a weight percentage of the added precipitant is in a range of approximately 8.0%-12.5% based on a total weight of the chitin-containing functional modifier.