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A kind of anti-thermal shock conductive polyimide fiber and preparation method thereof
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A technology of polyimide fiber and thermal shock resistance, which is applied in fiber types, fiber processing, textiles and papermaking, etc., and can solve problems such as limiting the application of high-performance fibers and poor thermal shock resistance
Active Publication Date: 2020-07-07
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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[0006] The above-mentioned patents have a common disadvantage of poor thermal shock resistance when used in a large temperature range, which limits their application as high-performance fibers
Method used
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[0046] The present invention provides a method for preparing thermal shock-resistant conductive polyimide fibers described in the above technical solution, comprising the following steps:
[0047] Alkaline treatment and cleaning of the polyimide fibers to obtain polyimide fibers containing carboxylate on the surface;
[0048] The polyimide fiber containing carboxylate on the surface is reacted in a solution of pyridine derivative or quinoline derivative, and washed to obtain polyimide fiber containing pyridine derivative or quinoline derivative on the surface;
[0049] placing the polyimide fibers containing pyridine derivatives or quinoline derivatives on the surface in a soluble metal salt solution to complex metal ions to obtain polyimide fibers containing metal ions on the surface;
[0050] The polyimide fiber containing metal ions on the surface is reduced and cleaned to obtain the polyimide fiber with a composite metal transition layer on the surface;
[0051] The polyi...
Embodiment 1
[0070] Pyridine derivatives of formula 102: Dissolve 2-aminopyridine (47.0g, 0.5mol) and triethylamine (104.2mL, 0.75mol) in dichloromethane (300.0mL), and control the reaction temperature at 0°C to 20°C 2-Chloroacetyl chloride (62.1 g, 0.55 mol) was added dropwise at ℃, and reacted at room temperature for 3 h after the drop was completed. Add water (100.0 mL) and continue stirring for 1 h, separate the water phase, wash the organic phase with saturated aqueous sodiumbicarbonate (100.0 mL), dry the organic phase with anhydroussodiumsulfate, filter off the desiccant, distill off dichloromethane, and dry in vacuo A reddish solid was obtained (76.8 g, yield: 90%). 1 H NMR (400MHz, CDCl 3 ):δ4.20(s,2H),7.10–7.09(m,1H),7.77–7.72(m,1H),8.20(d,1H,J=4.4Hz),8.32–8.31(m,2H), 8.93(s,1H).
Embodiment 2
[0072] Pyridine derivatives with the structure of formula 103: using 3-aminopyridine as the reaction raw material, the preparation process is the same as that of formula 102, the product is a white solid, the yield: 80.2 g, the yield: 94%. 1 H NMR (400MHz,D 2 O): δ9.16(d, J=3Hz, 1H), 8.42(d, 1H, J=6Hz), 8.40(d, 1H, J=9Hz), 7.90(dd, 1H, J=9Hz, 6Hz) ,4.25(s,2H).
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Abstract
The invention provides a thermal shock-resistant conductive polyimidefiber and a preparation method thereof. The fiber includes a modified polyimidefiber; and a metaltransition layer and a metal plating layer sequentially compounded on the surface of the modified polyimide fiber; The surface of the permanent polyimide fiber is modified by pyridine derivatives or quinoline derivatives; the metal in the metal transition layer is selected from copper, nickel or silver; the metal in the metal plating layer is selected from copper, nickel or silver. Using polyimide fiber as the base fiber, the surface is modified by pyridine derivatives or quinoline derivatives, and pyridine derivatives are introduced between the surface of the polyimide fiber and the coating metal through covalent bonds and coordination bonds. or quinoline derivatives transition layer to play the role of soft connection, and at the same time use the strong force of pyridine and amide bonds and metal to improve the bonding performance of fiber and metal, thereby improving the thermal shock resistance of the fiber; it has higher conductivity. Fiberconductivity is 1.15×10 4 ~5.0×10 4 S / cm; No metal falling off after 10 cycles at -180~200℃.
Description
technical field [0001] The invention belongs to the technical field of polyimide fibers, and in particular relates to a thermal shock-resistant conductive polyimide fiber and a preparation method thereof. Background technique [0002] The advancement of science and technology has driven the popularization of electronic products, and at the same time, electromagnetic pollution is accompanied by it. Electromagnetic radiation, noisepollution, water vaporpollution and air pollution are collectively known as the four major public hazards of human beings, threatening human existence. On the one hand, it is used as high-energy rays in many fields such as medicine, military affairs, and electronics; on the other hand, it is used in people's daily life as electronic equipment, and electromagnetic radiation will inevitably harm human health. The good electrical conductivity and magnetic conductivity of metal plates, metal meshes, metal wires, and metallized fabrics endow them with ...
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