High-strength PET polyester fiber and preparation method thereof
A polyester fiber, high-strength technology, applied in the direction of fiber chemical characteristics, cellulose/protein conjugated rayon, rayon manufacturing, etc., can solve fiber processing, increased difficulty in spinning, low strength of acetate fiber, and application and popularization restrictions, etc., to achieve the effect of increasing wear resistance, lowering softening temperature and high activity
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[0022] A preparation method of high-strength PET polyester fiber, comprising the following steps:
[0023] PET is sliced and crushed to a uniform powder PET with a size of 300 mesh 300 , preferably spinning PET polyester fiber, including but not limited to high viscosity oil bottle grade, matte grade polyester fiber;
[0024] Dopamine is dissolved into a solvent to form a solution, and PET is added to the solution 300 And add an organic weak base to adjust the pH to 8-12, heat and add polyethylene glycol, react until PET suspension powder appears, wash and dry to obtain PET Pre , the solvent is water, the mass ratio of water to dopamine is 60: (2-10), the organic weak base is triethylamine, ammonia water or a combination of the two, washed with water, absolute alcohol and dried in an oven ;
[0025] PET 300 、PET Pre After blending with acetate fiber, it is mixed with poly-Schiff base and reacted, and the reacted mixture is spun through a spinneret to obtain high-strengt...
Embodiment 1
[0029] PET is sliced and crushed to a uniform powder PET with a size of 300 mesh 300 , preferably spun PET polyester fibers, including but not limited to high-viscosity oil bottle grade, matte grade polyester fibers, with a viscosity of 0.66dL / g, a water content of less than 200ppm, and a carboxyl-terminal content of 18-22mol / t.
[0030] Use 30mL water as solvent, heat to dissolve 1g of dopamine, and wait until the sample is fully melted. Add the 300-mesh PET powder PET prepared in advance respectively 30010g, organic weak base, such as triethylamine or ammonia water, adjust the pH to 8. Under full stirring, after heating in a water bath for 24 hours, add Polyethylene Glycol 1g, continue the reaction until PET suspension powder appears, evenly dark brown, and continue to stir for 24 hours. The solution was cooled to room temperature, filtered under reduced pressure, washed three times with water and absolute alcohol, and dried in an oven to obtain polydopamine-modified PET...
Embodiment 2
[0033] PET is sliced and crushed to a uniform powder PET with a size of 300 mesh 300 , preferably spun PET polyester fibers, including but not limited to high-viscosity oil bottle grade, matte grade polyester fibers, with a viscosity of 0.66dL / g, a water content of less than 200ppm, and a carboxyl-terminal content of 18-22mol / t.
[0034] Use 30mL of water as a solvent, heat to dissolve 3g of dopamine, and wait until the sample is fully melted. Add the 300-mesh PET powder PET prepared in advance respectively 300 10g, organic weak base, such as triethylamine or ammonia water, adjust the pH to 10. Under sufficient stirring, after heating in a water bath for 24 hours, add polyethylene glycol 1g, continue the reaction until PET suspension powder appears, evenly in dark brown, and continue to stir for 24 hours. The solution was cooled to room temperature, filtered under reduced pressure, washed three times with water and absolute alcohol, and dried in an oven to obtain polydopam...
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