CN107503155B - Novel high-performance aramid fiber composite cable - Google Patents
Novel high-performance aramid fiber composite cable Download PDFInfo
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- CN107503155B CN107503155B CN201710846368.3A CN201710846368A CN107503155B CN 107503155 B CN107503155 B CN 107503155B CN 201710846368 A CN201710846368 A CN 201710846368A CN 107503155 B CN107503155 B CN 107503155B
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Abstract
The invention provides a novel high-performance aramid composite mooring rope, and a preparation method thereof comprises the following steps: 1) soaking the aramid fiber cable into the functional flame-retardant coating, and controlling the thickness of the inner flame-retardant coating by controlling the soaking time and the concentration of the coating; crosslinking the soaked aramid fiber cable at low temperature, and curing the flame-retardant coating; 2) and (3) continuing to soak the aramid fiber cable into the commercial polyurethane coating, and regulating and controlling the thickness of the outer coating by controlling the soaking time and the concentration of the coating. The invention provides a preparation method of a novel high-performance aramid composite rope, which utilizes a composite coating technology, can avoid the defect that the mechanical property of the traditional aramid flame-retardant rope is rapidly deteriorated under a high-temperature condition, and can also solve the defect that the bonding fastness of a single coating and the aramid rope is poor. Moreover, the composite coating of the novel high-performance aramid composite rope prepared by the method can endow the aramid rope with fireproof, heat-insulating, moisture-absorbing, ultraviolet-resistant and wear-resistant performances.
Description
Technical Field
The invention relates to a novel high-performance aramid fiber composite cable, and belongs to the technical field of flame-retardant ropes.
Background
The aramid fiber is a high-temperature-resistant flame-retardant fiber with high strength, high modulus, low density and good wear resistance, wherein the para-aramid fiber still has inherent incombustibility, does not spread when meeting fire, does not shrink and melt, has a limit oxygen index of 28-32, has good insulativity and corrosion resistance, and has a long life cycle, thereby gaining the reputation of 'synthetic steel wire'. The high-strength, stretch-proof, tear-proof, puncture-proof, high-temperature-resistant and flame-retardant aramid fiber is applied to the field of para-aramid fiber with great body development and irreplaceable superiority. The composite fiber rope has special strength and performance advantages as one kind of modern synthetic fiber rope, and plays a very important role in the fields of mooring ropes of ships and offshore oil fields, modernized wars, aviation, aerospace, sea defense equipment and the like.
The aramid fiber has good flame retardant property, is not decomposed and melted at the high temperature of 500 ℃, but the aramid fiber is the worst organic fiber in heat resistance, the mechanical property of the aramid fiber cable rope is rapidly deteriorated under the extreme conditions of open fire or high temperature (such as 300 ℃), and when the temperature reaches 280 ℃, the mass loss reaches 41 percent; at 300 ℃, the breaking strength is maintained at 80.3% after 5 hours, and only 15.0% is left after 20 hours. The aramid fiber has certain hygroscopicity, so that the mechanical property of the aramid fiber is reduced after the aramid fiber is soaked in seawater for a long time, the breaking strength of the aramid fiber is reduced by 15.6 percent after the aramid fiber is soaked for 1 week, and the breaking strength of the aramid fiber is reduced by 36.8 percent after the aramid fiber is soaked for 5 weeks. In addition, aramid has poor ultraviolet resistance, and the mechanical performance of aramid also drops rapidly under ultraviolet radiation, thus affecting the use performance of aramid. When the aramid fiber cable is used in various fields such as aviation, aerospace, fire protection, military, petrochemical, ocean, ships and the like, the cable is often required to be capable of meeting the use requirement after being stored in humid or water for a period of time under the illumination condition, and to operate for a certain time in a high-temperature or open-fire environment, so that the residual strength of the aramid fiber cable which can be used is ensured. Aiming at the requirements of different application fields, a protective layer is provided for the aramid fiber cable rope, and the effects of heat insulation, flame retardance, moisture absorption prevention and ultraviolet resistance are achieved, so that the aramid fiber cable rope can still have certain strength after being stored or working in various severe environments for a certain time, and the rescue purpose is very necessary.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a novel high-performance aramid fiber composite mooring rope.
The invention provides a fireproof, heat-insulating, moisture-absorbing and ultraviolet-resistant composite coating for an aramid fiber mooring rope. The inner layer is a flame-retardant coating, and the component selection conforms to the development concepts of environmental protection, low toxicity and high efficiency; the outer layer is a flexible wear-resistant conventional polyurethane coating, and has the performances of moisture absorption prevention and ultraviolet resistance while preventing the inner flame-retardant material from falling off in the using process. The composite coating improves the functional performance of the fiber, plays a role in reinforcement and strengthening, and improves the high-strength wear-resistant elasticity of the tensile strength of the cable.
The technical scheme of the invention is as follows:
a novel high-performance aramid composite cable is prepared by the following steps:
1) soaking the aramid fiber cable into the functional flame-retardant coating, and controlling the thickness of the inner flame-retardant coating by controlling the soaking time and the concentration of the coating; crosslinking the soaked aramid fiber cable at low temperature, and curing the flame-retardant coating;
2) continuously soaking the aramid fiber cable into commercial polyurethane coating, and regulating and controlling the thickness of the outer coating by controlling the soaking time and the coating concentration;
3) continuously drying or sun-drying the treated cable to obtain a finished product;
in the step 1), the functional flame-retardant coating comprises 65-80 parts by weight of chitosan, 20-30 parts by weight of flame retardant and a cross-linking agent; the weight portion of the cross-linking agent is 0.5-5 portions.
The flame retardant is inorganic phosphate or phosphaphenanthrene.
The cross-linking agent is any one or more of formaldehyde, dialdehyde cross-linking agent, epoxy compound, tripolyphosphate, ethylene glycol, diglycidyl ether and diisocyanate.
The dialdehyde crosslinking agent is glutaraldehyde or glyoxal.
The epoxy compound is episulfide chloropropane.
The preparation method of the functional flame-retardant coating comprises the following steps:
1) preparing a chitosan solution: adding a certain amount of chitosan into dilute acetic acid aqueous solution, stirring at about 50 ℃ until the chitosan is completely dissolved to obtain yellow and transparent chitosan solution, wherein the mass percent of the chitosan solution is 1-5 wt%;
2) preparing a flame retardant solution: adding a certain amount of flame retardant into ethanol, stirring until the flame retardant is completely dissolved to obtain a colorless and transparent flame retardant solution, wherein the concentration of the flame retardant solution is 50-150 mg/mL;
3) adding a flame retardant solution into a chitosan solution, stirring until the solution is uniformly dispersed, slowly adding a cross-linking agent solution with the mass percent of 1-5wt% at room temperature, and continuously stirring to obtain the uniformly dispersed flame-retardant coating.
The preparation method of the outer layer polyurethane coating comprises the following steps: adding water to commercial water-soluble polyurethane resin according to the requirement, diluting and stirring to obtain the polyurethane coating with a certain solid content, wherein the mass percentage of the polyurethane coating is 20-50 wt%.
In the step 1), the soaking time of the flame-retardant coating is as follows (adjusted according to the weaving mode and the strand number of the cable rope)
| 12-strand rope | 10-30min |
| 8 x 3 ply | 5-30min |
The polyurethane coating is carried out according to a conventional process.
The invention has the following beneficial effects:
the invention provides a preparation method of a novel high-performance aramid composite rope, which utilizes a composite coating technology, can avoid the defect that the mechanical property of the traditional aramid flame-retardant rope is rapidly deteriorated under a high-temperature condition, and can also solve the defect that the bonding fastness of a single coating and the aramid rope is poor. Moreover, the composite coating of the novel high-performance aramid composite rope prepared by the method can endow the aramid rope with fireproof, heat-insulating, moisture-absorbing, ultraviolet-resistant and wear-resistant performances, so that the use requirements of the aramid rope in different fields are met;
in addition, the novel high-performance aramid composite rope disclosed by the invention has the advantages that the preparation process flow is simple, the pretreatment is avoided, the coating is subjected to low-temperature crosslinking curing or natural airing, the energy is saved, and the production cost is reduced.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
The preparation method of the novel high-performance aramid composite rope comprises the following steps:
1) soaking the 12-strand rope in the functional coating for 10min, taking out, performing low-temperature crosslinking and curing,
the preparation method of the outer layer polyurethane coating comprises the following steps: adding water to commercial water-soluble polyurethane resin according to the requirement, diluting and stirring to obtain the polyurethane coating with a certain solid content, wherein the mass percentage of the polyurethane coating is 20 wt%.
2) Soaking the aramid fiber rope in 20 wt% of polyurethane coating, and naturally airing or drying at low temperature to prepare the novel high-performance aramid fiber composite rope, wherein the functional coating comprises the following components in parts by weight:
the preparation method of the functional flame-retardant coating comprises the following steps:
1) preparing a chitosan solution: adding a certain amount of chitosan into a dilute acetic acid aqueous solution, and stirring at about 50 ℃ until the chitosan is completely dissolved to obtain a yellow and transparent chitosan solution, wherein the mass percent of the chitosan solution is 1 wt%;
2) preparing a flame retardant solution: adding a certain amount of flame retardant into ethanol, stirring until the flame retardant is completely dissolved to obtain a colorless and transparent flame retardant solution, wherein the concentration of the flame retardant solution is 50 mg/mL;
3) adding a flame retardant solution into a chitosan solution, stirring until the solution is uniformly dispersed, slowly adding a cross-linking agent solution with the mass percent of 1 wt% at room temperature, and continuously stirring to obtain the uniformly dispersed flame-retardant coating.
Example 2
The preparation method of the novel high-performance aramid composite rope comprises the following steps:
1) soaking the 12-strand rope in the functional coating for 20min, taking out, performing low-temperature crosslinking and curing,
the preparation method of the outer layer polyurethane coating comprises the following steps: adding water to commercial water-soluble polyurethane resin according to the requirement, diluting and stirring to obtain the polyurethane coating with a certain solid content, wherein the mass percentage of the polyurethane coating is 30 wt%.
2) And soaking the aramid fiber rope in 30 wt% of polyurethane coating, and naturally airing or drying at low temperature to prepare the novel high-performance aramid fiber composite rope. The functional coating comprises the following components in parts by weight:
| components | Specific names of components | Content (parts by weight) |
| Chitosan | Chitosan | 70 portions of |
| Flame retardant | DOPO | 27 portions of |
| Crosslinking agent | Epoxy chloropropane | 3 portions of |
The preparation method of the functional flame-retardant coating comprises the following steps:
1) preparing a chitosan solution: adding a certain amount of chitosan into a dilute acetic acid aqueous solution, and stirring at about 50 ℃ until the chitosan is completely dissolved to obtain a yellow and transparent chitosan solution, wherein the mass percent of the chitosan solution is 2 wt%;
2) preparing a flame retardant solution: adding a certain amount of flame retardant into ethanol, stirring until the flame retardant is completely dissolved to obtain a colorless and transparent flame retardant solution, wherein the concentration of the flame retardant solution is 100 mg/mL;
3) adding a flame retardant solution into a chitosan solution, stirring until the solution is uniformly dispersed, slowly adding a cross-linking agent solution with the mass percent of 2 wt% at room temperature, and continuously stirring to obtain the uniformly dispersed flame-retardant coating.
Example 3
The preparation method of the novel high-performance aramid composite rope comprises the following steps:
1) soaking the 12-strand rope in the functional coating for 30min, taking out, performing low-temperature crosslinking and curing,
the preparation method of the outer layer polyurethane coating comprises the following steps: adding water to commercial water-soluble polyurethane resin according to the requirement, diluting and stirring to obtain the polyurethane coating with a certain solid content, wherein the mass percent of the polyurethane coating is 50 wt%.
2) And soaking the aramid fiber rope in 50 wt% of polyurethane coating, and naturally airing or drying at low temperature to prepare the novel high-performance aramid fiber composite rope. The functional coating comprises the following components in parts by weight:
| components | Specific names of components | Content (parts by weight) |
| Chitosan | Chitosan | 80 portions |
| Flame retardant | Ammonium polyphosphate | 20 portions of |
| Crosslinking agent | Sodium tripolyphosphate | 0.5 portion |
The preparation method of the functional flame-retardant coating comprises the following steps:
1) preparing a chitosan solution: adding a certain amount of chitosan into a dilute acetic acid aqueous solution, and stirring at about 50 ℃ until the chitosan is completely dissolved to obtain a yellow and transparent chitosan solution, wherein the mass percent of the chitosan solution is 5 wt%;
2) preparing a flame retardant solution: adding a certain amount of flame retardant into ethanol, stirring until the flame retardant is completely dissolved to obtain a colorless and transparent flame retardant solution, wherein the concentration of the flame retardant solution is 150 mg/mL;
3) adding a flame retardant solution into a chitosan solution, stirring until the solution is uniformly dispersed, slowly adding a cross-linking agent solution with the mass percent of 5wt% at room temperature, and continuously stirring to obtain the uniformly dispersed flame-retardant coating.
Example 4
The following burning test and high temperature resistance tensile test were conducted for examples 1 to 3, and the test results were as follows:
1. open fire combustion test of aramid fiber cable: vertically hanging the aramid fiber rope, burning the aramid fiber rope with a liquefied gas blowtorch, and measuring the breaking time of the cable rope; under the condition of loading 20% of breaking strength, the aramid fiber rope is subjected to open flame combustion for 30s by using a liquefied gas blowtorch, and the residual strength of the rope is measured.
2. And (3) performing a water washing resistance test on the aramid fiber cable: soaking the aramid fiber cable in tap water for 12 weeks and 24 weeks, and burning by using a liquefied gas torch to measure the burning break time; under the condition of loading 20% of breaking strength, the aramid fiber rope is subjected to open flame combustion for 30s by using a liquefied gas blowtorch, and the residual strength of the rope is measured.
3. The aramid fiber cable rope is subjected to ultraviolet resistance test: placing the aramid fiber cable under an ultraviolet lamp for 24 hours and 48 hours, and burning by using a liquefied gas blowtorch to measure the burning breaking time; under the condition of loading 20% of breaking strength, the aramid fiber rope is subjected to open flame combustion for 30s by using a liquefied gas blowtorch, and the residual strength of the rope is measured.
4. And (3) testing the wear resistance of the aramid fiber cable: the aramid fiber cable rope is subjected to 10000 times of lower friction detection by using a universal abrasion tester, and the combustion fracture time of the aramid fiber cable rope is measured by using a liquefied gas torch for combustion; under the condition of loading 20% of breaking strength, the aramid fiber rope is subjected to open flame combustion for 30s by using a liquefied gas blowtorch, and the residual strength of the rope is measured.
The test results were as follows:
as can be seen from the above table:
after the novel high-performance aramid fiber composite rope is burnt by open fire, the breaking time is obviously increased. Secondly, compared with the untreated aramid fiber rope, the novel high-performance aramid fiber composite rope has the advantages that after being subjected to water washing, ultraviolet light and friction treatment, the combustion breaking time and the residual strength are not obviously reduced, and the aramid fiber rope treated by the coating is better improved in high temperature resistance, water washing resistance, ultraviolet light resistance and wear resistance.
Claims (6)
1. A novel high-performance aramid composite cable is characterized in that the preparation method comprises the following steps:
1) soaking the aramid fiber cable into the functional flame-retardant coating, and controlling the thickness of the inner flame-retardant coating by controlling the soaking time and the concentration of the coating; crosslinking the soaked aramid fiber cable at low temperature, and curing the flame-retardant coating;
2) continuously soaking the aramid fiber cable into commercial polyurethane coating, and regulating and controlling the thickness of the outer coating by controlling the soaking time and the coating concentration;
3) continuously drying or sun-drying the treated cable to obtain a finished product;
in the step 1), the functional flame-retardant coating comprises 65-80 parts by weight of chitosan, 20-30 parts by weight of flame retardant and a cross-linking agent; 0.5-5 parts of cross-linking agent;
the flame retardant is inorganic phosphate or phosphaphenanthrene;
the cross-linking agent is any one or more of formaldehyde, dialdehyde cross-linking agent, epoxy compound, tripolyphosphate, ethylene glycol, diglycidyl ether and diisocyanate.
2. The novel high-performance aramid composite rope as claimed in claim 1, wherein the dialdehyde crosslinking agent is glutaraldehyde or glyoxal.
3. The new high performance aramid composite rope as claimed in claim 1, characterized in that said epoxy compound is epichlorohydrin.
4. The novel high-performance aramid composite rope as claimed in claim 1, wherein the functional flame retardant coating is prepared by the following method:
1) preparing a chitosan solution: adding a certain amount of chitosan into a dilute acetic acid aqueous solution, stirring at 50 ℃ until the chitosan is completely dissolved to obtain a yellow and transparent chitosan solution, wherein the mass percent of the chitosan solution is 1-5 wt%;
2) preparing a flame retardant solution: adding a certain amount of flame retardant into ethanol, stirring until the flame retardant is completely dissolved to obtain a colorless and transparent flame retardant solution, wherein the concentration of the flame retardant solution is 50-150 mg/mL;
3) adding a flame retardant solution into a chitosan solution, stirring until the solution is uniformly dispersed, slowly adding a cross-linking agent solution with the mass percent of 1-5wt% at room temperature, and continuously stirring to obtain the uniformly dispersed flame-retardant coating.
5. The novel high-performance aramid composite rope as claimed in claim 1, wherein the formulation method of the outer layer polyurethane coating is as follows: adding water to commercial water-soluble polyurethane resin according to the requirement, diluting and stirring to obtain the polyurethane coating with a certain solid content, wherein the mass percentage of the polyurethane coating is 20-50 wt%.
6. The novel high-performance aramid composite rope as claimed in claim 1, wherein in step 1), the flame retardant coating is soaked for the following time,
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| WO2019000613A1 (en) * | 2017-06-26 | 2019-01-03 | 徐天宏 | Novel high-performance aramid-based composite rope |
| CN114351465A (en) * | 2021-12-28 | 2022-04-15 | 南通新帝克单丝科技股份有限公司 | Method for coating aramid 1414 fibers with PEEK |
| CN114703576B (en) * | 2022-04-18 | 2022-12-23 | 闽江学院 | Flame-retardant elastic antibacterial composite yarn and production process thereof |
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| CN105951419B (en) * | 2016-05-16 | 2017-12-12 | 中国科学技术大学 | A kind of polyester fiber for being crosslinked the modification of LBL self-assembly flame retardant coating and preparation method thereof |
| CN106008742B (en) * | 2016-05-18 | 2018-11-13 | 国家海洋局第三海洋研究所 | Marine biomass based flameproofing with fiber element structure |
| WO2019000613A1 (en) * | 2017-06-26 | 2019-01-03 | 徐天宏 | Novel high-performance aramid-based composite rope |
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2017
- 2017-08-22 WO PCT/CN2017/098422 patent/WO2019000613A1/en active Application Filing
- 2017-09-19 CN CN201710846368.3A patent/CN107503155B/en active Active
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| WO2019000613A1 (en) | 2019-01-03 |
| CN107503155A (en) | 2017-12-22 |
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