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CN-122011741-A - Stretch-deformation-resistant mobile cable sheath material and preparation method thereof

CN122011741ACN 122011741 ACN122011741 ACN 122011741ACN-122011741-A

Abstract

The invention relates to the field of cables, in particular to a mobile cable sheath material with stretching deformation resistance and a preparation method thereof, which are used for solving the problem that the existing cable sheath material is easy to deform or crack when facing mechanical stretching or repeated bending, and the invention uses a modified polyurethane elastomer as a matrix to improve the toughness and rebound resilience of the material by constructing the synergistic effect of a 'hydrogen bond physical crosslinking network' and a 'structure reinforcing network'; the UPy group at the tail end of the molecular side chain of the toughening agent can form a strong dimer through four hydrogen bonds, a dynamic and physical secondary crosslinking network is formed in the material, irreversible slip of the polymer molecular chain is effectively limited, the material is driven to rebound, and the permanent deformation resistance is improved.

Inventors

  • CHENG JING
  • HE ZHIWEN
  • GE JIAQUAN
  • WANG TIANXING

Assignees

  • 江西汉光电缆股份有限公司

Dates

Publication Date
20260512
Application Date
20260319

Claims (10)

  1. 1. The stretch-deformation-resistant mobile cable sheath material is characterized by comprising the following components in parts by weight: 40-70 parts of modified polyurethane elastomer, 3-10 parts of chopped aramid fiber, 10-25 parts of elastomer toughening agent, 5-8 parts of silane coupling agent, 0.5-1.5 parts of cross-linking agent, 1-3 parts of co-cross-linking agent, 2-6 parts of wear-resistant agent, 0.5-1.5 parts of antioxidant, 1-2 parts of ultraviolet absorber and 1-2 parts of lubricant; Wherein the modified polyurethane elastomer is prepared by the following steps: Step a1, mixing and stirring polyester glycol, first isophorone diisocyanate, dibutyl tin dilaurate and first N, N-dimethylacetamide to obtain a prepolymer, adding second isophorone diisocyanate, mixing and stirring, adding adipic acid dihydrazide and second N, N-dimethylacetamide, stirring for reaction, vacuum defoaming, curing and drying to obtain an elastomer; step a2, performing ultrasonic dispersion on Ti 3 AlC 2 , liF and ethanol solution, performing ball milling, drying, adding hydrochloric acid solution, performing reaction under water bath heating, performing centrifugal washing, and drying a precipitate to obtain an intermediate product; Step a3, stirring 2, 3-epoxypropyl trimethyl ammonium chloride, deionized water and melamine in an oil bath for reaction, filtering, evaporating and concentrating filtrate, adding n-butanol, mixing and stirring, adding absolute ethyl alcohol and ethyl acetate, mixing and stirring, standing for layering, removing supernatant, washing with a mixed solution, adding an intermediate product and an ethanol solution, performing ultrasonic dispersion, stirring, centrifuging, removing supernatant, washing, and drying to obtain a precursor; Step a4, mixing and stirring the elastomer and the first part of N, N-dimethylformamide to obtain mother liquor, ultrasonically dispersing the precursor and the second part of N, N-dimethylformamide, adding the mother liquor, mixing and stirring, pouring into a mould, and drying to obtain the modified polyurethane elastomer.
  2. 2. The stretch-deformation-resistant mobile cable sheath material according to claim 1, wherein the chopped aramid fiber is of an aramid fiber 1414 with a length of 3-5mm, the silane coupling agent is KH-550, the crosslinking agent is dicumyl peroxide, the co-crosslinking agent is triallyl isocyanurate, the wear-resistant agent is one of molybdenum disulfide and graphite, the antioxidant is 1010, the ultraviolet absorber is UV-531, and the lubricant is calcium stearate.
  3. 3. The stretch-proofing mobile cable sheath material according to claim 1, wherein the ratio of the total amount of polyester glycol, isophorone diisocyanate, dibutyltin dilaurate, N-dimethylacetamide and adipic acid dihydrazide in the step a1 is 8-10mL, 2-2.5mL, 0.5mL, 60mL, 0.8-1g, the polyester glycol is one of polycarbonate glycol T5651 and polycaprolactone diol PCL1000, the first amount of isophorone diisocyanate accounts for 2/3 of the total amount of isophorone diisocyanate, the second amount of isophorone diisocyanate accounts for 1/3 of the total amount of isophorone diisocyanate, the first amount of N, N-dimethylacetamide accounts for 1/10 of the total amount of N, N-dimethylacetamide, and the second amount of N, N-dimethylacetamide accounts for 9/10 of the total amount of N, N-dimethylacetamide.
  4. 4. The stretch-proofing mobile cable sheath material according to claim 1, wherein the dosage ratio of Ti 3 AlC 2 to LiF to ethanol solution to hydrochloric acid solution in step a2 is 1-2g to 20-30mL to 20-40mL, the mass fraction of the ethanol solution in step a2 is 50%, the concentration of the hydrochloric acid solution is 9mol/L, the dosage ratio of 2, 3-epoxypropyltrimethylammonium chloride, deionized water, melamine, n-butanol to absolute ethyl alcohol, ethyl acetate, intermediate product and ethanol solution in step a3 is 13-15g to 100-150mL to 2-3g to 80-100mL to 200-300mL to 50-80mL to 1-2g to 20-30mL, the mass fraction of the ethanol solution in step a3 is 80%, and the mixed solution is formed by mixing absolute ethyl alcohol and ethyl acetate according to a volume ratio of 1 to 1.
  5. 5. The stretch-proofing mobile cable sheath material according to claim 1, wherein the ratio of the total amount of the elastomer, the N, N-dimethylformamide and the precursor in the step a4 is 10-15g:150-200mL:0.5-1g, the first part of N, N-dimethylformamide accounts for 9/10 of the total amount of N, N-dimethylformamide, and the second part of N, N-dimethylformamide accounts for 1/10 of the total amount of N, N-dimethylformamide.
  6. 6. The stretch-deformation resistant mobile cable jacket material according to claim 1, wherein the elastomeric toughening agent is prepared by: Step b1, mixing and stirring a polymer elastomer-olefin-styrene-olefin copolymer and chloroform in an ice water bath, adding anhydrous SnCl 4 and 1, 4-dichloro methoxybutane, stirring for reaction, filtering, washing a filter cake, adding toluene, mixing and stirring to obtain a mother solution; Step b2, adding the esterified copolymer and toluene into a three-necked flask, mixing and stirring, adding KOH, tetrabutylammonium bromide and deionized water into the three-necked flask, stirring for reaction, filtering, washing the precipitate, and drying to obtain a hydroxylated copolymer; Adding the hydroxylated copolymer and chloroform into a three-neck flask, stirring, reacting 2-amino-4-hydroxy-6-methylpyrimidine, hexamethylene diisocyanate and pyridine, adding n-hexane, mixing, stirring, filtering, washing precipitate, drying, adding into the three-neck flask, adding dibutyl tin dilaurate, reacting, standing, and drying to obtain the elastomer toughening agent.
  7. 7. The stretch-resistant moving cable jacket material according to claim 6, wherein the polymer elastomer-olefin-styrene-olefin copolymer in step b1, chloroform, anhydrous SnCl 4 , 1, 4-dichloromethoxybutane, toluene, potassium acetate, tetrabutylammonium bromide, and deionized water are used in a ratio of 6-8G to 200mL to 3-5mL to 8-10mL to 200mL to 15-20G to 2.5G to 30-50mL, and the polymer elastomer-olefin-styrene-olefin copolymer is of the type G1652.
  8. 8. The stretch-resistant therapeutic cable jacket material according to claim 6, wherein the esterified copolymer, toluene, KOH, tetrabutylammonium bromide, and deionized water in step b2 are used in a ratio of 6-8g:200-250ml:4-6g:1.5-2g:10-20mL.
  9. 9. The stretch-resistant moving cable jacket material according to claim 6, wherein the hydroxylated copolymer, chloroform, 2-amino-4-hydroxy-6-methylpyrimidine, hexamethylene diisocyanate, pyridine, n-hexane, and dibutyltin dilaurate in step b3 are used in an amount ratio of 4-5g:80-100ml:0.3-0.5g:0.5-0.6ml:0.02-0.05ml:10-20ml:1-1.5g.
  10. 10. A method for preparing a stretch-proof mobile cable sheath material according to any one of claims 1-9, comprising the steps of: weighing 40-70 parts of modified polyurethane elastomer, 3-10 parts of chopped aramid fiber, 10-25 parts of elastomer toughening agent, 5-8 parts of silane coupling agent, 0.5-1.5 parts of cross-linking agent, 1-3 parts of co-cross-linking agent, 2-6 parts of wear-resistant agent, 0.5-1.5 parts of antioxidant, 1-2 parts of ultraviolet absorber and 1-2 parts of lubricant according to parts by weight; Mixing and stirring the chopped aramid fiber and the silane coupling agent, drying for later use, putting the modified polyurethane elastomer, the elastomer toughening agent, the wear-resisting agent, the antioxidant, the ultraviolet absorber and the lubricant into a high-speed mixer for mixing and stirring, adding the treated chopped aramid fiber, transferring the chopped aramid fiber into an internal mixer for internal mixing, adding the cross-linking agent and the co-cross-linking agent through a side feeding port, continuing internal mixing, extruding, cooling, granulating and drying to obtain the mobile cable sheath material with tensile deformation resistance.

Description

Stretch-deformation-resistant mobile cable sheath material and preparation method thereof Technical Field The invention relates to the field of cables, in particular to a mobile cable sheath material capable of resisting stretching deformation and a preparation method thereof. Background With the increasing of the requirements of modern society on electronic products and electrical equipment, the requirements of cables for use under various environmental conditions are becoming wider and wider, the design and preparation of cable sheath materials are an important technology in the cable field, the cables are protected from the external environment, the service life of the cables is prolonged, the cable sheath is one of important functions of the cable sheath materials, and the cable sheath is a material covered on the outer layer of the cables and mainly used for protecting internal wires from physical damage and environmental factors, so that the cables can safely and reliably transmit electric power or signals. Conventional cable sheathing materials are typically made of elastic materials such as rubber or plastic, which, although providing some protection, are relatively susceptible to deformation or breakage in the face of mechanical stretching or repeated bending, resulting in the potential failure of conventional cable sheathing materials in some applications, such as in marine, vehicular or industrial applications, where the cable is frequently moved, affecting the normal use of the cable. Therefore, the stretch-deformation-resistant movable cable sheath material and the preparation method thereof have important significance for improving the reliability of the cable and prolonging the service life of the cable. Disclosure of Invention In order to overcome the technical problems, the invention aims to provide a mobile cable sheath material with stretching deformation resistance and a preparation method thereof, which solve the problem that the existing cable sheath material is easy to deform or crack when facing mechanical stretching or repeated bending. The aim of the invention can be achieved by the following technical scheme: In a first aspect, the application provides a stretch-deformation-resistant mobile cable sheath material, which comprises the following components in parts by weight: 40-70 parts of modified polyurethane elastomer, 3-10 parts of chopped aramid fiber, 10-25 parts of elastomer toughening agent, 5-8 parts of silane coupling agent, 0.5-1.5 parts of cross-linking agent, 1-3 parts of co-cross-linking agent, 2-6 parts of wear-resistant agent, 0.5-1.5 parts of antioxidant, 1-2 parts of ultraviolet absorber and 1-2 parts of lubricant; The short-cut aramid fiber is characterized in that the fiber type of the short-cut aramid fiber is aramid 1414, the length of the short-cut aramid fiber is 3-5mm, the type of the silane coupling agent is KH-550, the crosslinking agent is dicumyl peroxide, the co-crosslinking agent is triallyl isocyanurate, the wear-resisting agent is one of molybdenum disulfide and graphite, the type of the antioxidant is 1010, the type of the ultraviolet absorber is UV-531, and the lubricant is calcium stearate. As a preferred embodiment of the present invention, the modified polyurethane elastomer is prepared by the steps of: Adding polyester glycol, first isophorone diisocyanate, dibutyl tin dilaurate and first N, N-dimethylacetamide into a three-neck flask provided with a stirrer and a thermometer, mixing and stirring for 3 hours at 80 ℃ to obtain a prepolymer, cooling to 40 ℃, adding second isophorone diisocyanate into the prepolymer, mixing and stirring for 30 minutes, adding adipic acid dihydrazide and second N, N-dimethylacetamide, stirring and reacting for 24 hours, defoaming in a vacuum oven, solidifying for 24 hours at 80 ℃, and then vacuum drying for 48-72 hours at 60 ℃ to obtain an elastomer; Adding Ti 3AlC2, liF and an ethanol solution into a three-neck flask provided with a stirrer and a thermometer, performing ultrasonic dispersion for 20-30min, transferring into a ball milling tank, performing ball milling for 6-9h at a ball material ratio of 3-5:1, placing into a vacuum drying box at 60 ℃ for drying for 10-12h, adding a hydrochloric acid solution, introducing nitrogen for protection, performing a water bath heating at 40 ℃ for reacting for 24h, using absolute ethanol as a centrifugal washing liquid, performing centrifugal washing at a rotating speed of 10000r/min for 5-10min, transferring the precipitate into the vacuum drying box at 80 ℃ for drying for 12h, and obtaining an intermediate product; Step a3, adding 2, 3-epoxypropyl trimethyl ammonium chloride, deionized water and melamine into a three-neck flask provided with a stirrer and a thermometer, mixing and stirring for reaction for 12 hours at 90 ℃ under the condition of oil bath, filtering at 25 ℃, placing filtrate into a vacuum drying oven at 80 ℃, evaporating and concentrating for 3-5min, addi