A surface-modified ultra-high molecular weight polyethylene fiber and its preparation method
A technology of ultra-high molecular weight and polyethylene fiber, which is applied in dry-cleaning fiber products, fiber treatment, fiber type, etc. It can solve the problems of unsatisfactory surface wettability, difficulty in continuous production, and easy shedding of PDA, etc., to achieve continuous large-scale Effects of production, structural stabilization, and increased active reactive sites
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Embodiment 1
[0070] (1) Clean the fibers ultrasonically in acetone for 20 minutes, take them out and dry them.
[0071] (2) Add silane coupling agent S1 and dopamine to the Tris-HCl buffer solution with a pH of 8.5 at the same time, the molar ratio is 1:300, and react for 10 minutes at a stirring rate of 500 rpm, add UHMWPE fiber, and react for 3 hours .
[0072] (3) Add the silane coupling agent S2 with a molar ratio of 10:1 to the S1 in the step (2) into the above mixture, stir and react for 10 h, take out the fiber, wash and dry.
[0073] In the modified UHMWPE fiber, the surface C content is 70wt%, the O content is 20wt%, the N content is 2wt%, the Si content is 8wt%, the epoxy group and -CH 2 -The infrared absorption peak area ratio is 1:73, and the mass fraction of the PDA layer in the fiber is 1.3%;
[0074] The thickness of the PDA layer is 800nm, the surface pore size is 100nm, and the BET surface area is 8m 2 / g, the surface energy is 30.0 mN / m, and the strength retention rate...
Embodiment 2
[0077] (1) Clean the fibers ultrasonically in acetone for 20 minutes, take them out and dry them.
[0078] (2) Add silane coupling agent S1 and dopamine to the Tris-HCl buffer solution with a pH of 8.5 at the same time, the molar ratio of which is 1:500, and react for 40 minutes at a stirring rate of 500 rpm, add UHMWPE fiber, and react for 10 hours .
[0079] (3) Add the silane coupling agent S2 with a molar ratio of 6:1 to the S1 in the step (2) into the above mixture, stir and react for 8 hours, take out the fibers, wash and dry.
[0080]In the modified UHMWPE fiber, the surface C content is 58wt%, the O content is 23wt%, the N content is 7wt%, the Si content is 12wt%, the epoxy group and -CH 2 -The infrared absorption peak area ratio is 1:59, and the mass fraction of the PDA layer in the fiber is 4.8%;
[0081] The thickness of the PDA layer is 1000nm, the surface pore size is 700nm, and the BET surface area is 30m 2 / g, the surface energy is 60.0mN / m, and the strength ...
Embodiment 3
[0084] (1) Clean the fibers ultrasonically in acetone for 20 minutes, take them out and dry them.
[0085] (2) Add silane coupling agent S1 and dopamine to the Tris-HCl buffer solution with a pH of 8.5 at the same time, the molar ratio of which is 1:450, and react for 30 minutes at a stirring rate of 1500 rpm, add UHMWPE fiber, and react for 6 hours .
[0086] (3) Add the silane coupling agent S2 with a molar ratio of 7:1 to the S1 in the step (2) into the above mixture, stir and react for 10 h, take out the fiber, wash and dry.
[0087] In the modified UHMWPE fiber, the surface C content is 64wt%, the O content is 25wt%, the N content is 3wt%, the Si content is 9wt%, the epoxy group and -CH 2 -The infrared absorption peak area ratio is 1:62, and the mass fraction of the PDA layer in the fiber is 2.8%;
[0088] The thickness of the PDA layer is 920nm, the surface pore size is 400nm, and the BET surface area is 20m 2 / g, the surface energy is 45.0mN / m, and the strength reten...
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