CN111978683A - Glue solution for resisting resin cracking of high-pressure composite gas cylinder, preparation method and curing method thereof - Google Patents
Glue solution for resisting resin cracking of high-pressure composite gas cylinder, preparation method and curing method thereof Download PDFInfo
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- CN111978683A CN111978683A CN202010830750.7A CN202010830750A CN111978683A CN 111978683 A CN111978683 A CN 111978683A CN 202010830750 A CN202010830750 A CN 202010830750A CN 111978683 A CN111978683 A CN 111978683A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
- C08G59/4215—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof cycloaliphatic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/10—Applications used for bottles
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a glue solution for resisting resin cracking of a high-pressure composite gas cylinder, a preparation method and a curing method thereof, and belongs to the technical field of high-pressure composite gas cylinders. The glue solution comprises epoxy resin, a curing agent, an accelerant and a defoaming agent; the dosage of the curing agent, the accelerator and the defoaming agent is respectively 60-95%, 0.5-3% and 0.1-1% of the mass of the epoxy resin. The preparation method comprises the following steps: heating the epoxy resin, adding the epoxy resin and the curing agent into a glue blending barrel in proportion, uniformly stirring, adding the accelerator and the defoamer, stirring, and standing to obtain the epoxy resin. The curing method of the invention is to place the inner liner of the high-pressure composite gas cylinder with the formed composite winding layer in a curing furnace and cure the glue solution by temperature programming. The glue solution has long operation time, no crack on the surface of the gas cylinder after self-tightening water pressure, no reduction of fatigue and bursting strength, no reduction of the glass transition temperature of the system, quick infiltration, no bubble after curing, transparent surface and no whitening.
Description
Technical Field
The invention belongs to the technical field of high-pressure composite gas cylinders, and particularly relates to a resin cracking resistant glue solution for a high-pressure composite gas cylinder, a preparation method and a curing method thereof.
Background
The winding gas cylinder is formed by impregnating glass fiber or carbon fiber with glue solution, continuously winding the impregnated glass fiber or carbon fiber on the liner according to certain linear requirements and tension control, and heating and curing the impregnated glass fiber or carbon fiber. And then self-tightening treatment is carried out to reduce the stress of the inner container under the working pressure and fully exert the high-strength performance of the fiber.
The thickness of the composite layer of the 70MPa hydrogen storage cylinder is generally more than 30mm, and the thicker the composite layer is, the longer the winding time is, so that the longer the operable time of the glue solution is required.
In the curing process, the surface of the gas cylinder is easy to crack after self-tightening due to overlarge shrinkage stress of the glue solution, and the fatigue of the gas cylinder is influenced if the self-tightening pressure is reduced. In the prior art, the operation time of the glue solution is short, the glue solution becomes sticky after 3 hours at normal temperature, the obvious solidification phenomenon exists, cracks are easy to generate after the water pressure is tightened, and the explosion and fatigue performance of the gas cylinder are reduced.
In addition, in the prior art, a toughening agent is often added into the glue solution to reduce the brittleness of the epoxy resin in the glue solution, increase the toughness and improve the bearing strength. However, the adoption of the glue solution added with the toughening agent can reduce the glass transition temperature (Tg) of the glue solution, so that the heat resistance of the gas cylinder is reduced, and the bursting strength of the gas cylinder is influenced; and the color of the cured gas cylinder is changed (for example, the addition of the nitrile rubber toughening agent can change the color of the fiber, so that the gas cylinder is white), and the gas cylinder is not easy to accept by customers.
Therefore, the glue solution for resisting resin cracking of the high-pressure composite gas cylinder is provided, the surface of the gas cylinder has no cracks after self-tightening water pressure, the operation time is long, the glass transition temperature is high, the color of the gas cylinder is not influenced, and the problem to be solved by the technical personnel in the field is urgently solved.
Disclosure of Invention
The invention aims to provide a glue solution for resisting resin cracking of a high-pressure composite gas cylinder, and solves the problems that the glue solution in the prior art is short in operable time, the glass transition temperature of the glue solution is reduced after a toughening agent is added, and the color of the gas cylinder is changed after solidification.
The second purpose of the invention is to provide a preparation method of the glue solution.
The invention also aims to provide a method for curing the high-pressure composite gas cylinder by adopting the glue solution.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the glue solution for resisting resin cracking of the high-pressure composite gas cylinder comprises epoxy resin, a curing agent, an accelerant and a defoaming agent;
wherein, the dosage of the curing agent is 60 to 95 percent of the mass of the epoxy resin, the dosage of the accelerating agent is 0.5 to 3 percent of the mass of the epoxy resin, and the dosage of the defoaming agent is 0.1 to 1 percent of the mass of the epoxy resin.
The glue solution is prepared by matching epoxy resin, a curing agent, an accelerant and a defoaming agent, the winding fiber is impregnated in the glue solution, the surface of the finally obtained gas cylinder has no cracks, the operation time is long, the gas cylinder can be operated for 24-36 hours at normal temperature, micro-curing at normal temperature is effectively avoided, the glass transition temperature is high, and the surface color of the gas cylinder is colorless and transparent.
Preferably, in some embodiments of the present invention, the curing agent is used in an amount of 70 to 90% by mass of the epoxy resin, the accelerator is used in an amount of 0.8 to 2% by mass of the epoxy resin, and the defoamer is used in an amount of 0.2 to 0.6% by mass of the epoxy resin.
In some embodiments of the present invention, the epoxy resin comprises any one or more of bisphenol a epoxy resin, modified bisphenol a epoxy resin, and bisphenol F epoxy resin; preferably, a bisphenol a epoxy resin; more preferably, epoxy resin CYD-128 or epoxy resin CYD-127.
In some embodiments of the invention, the curing agent comprises one or both of methyl tetrahydrophthalic anhydride and modified methyl tetrahydrophthalic anhydride, and one or both of methyl hexahydrophthalic anhydride and modified methyl hexahydrophthalic anhydride; preferably, the total mass of the curing agent is 100%, and the total mass of the curing agent is 60% -70% of methyl tetrahydrophthalic anhydride or/and modified methyl tetrahydrophthalic anhydride and 30% -40% of methyl hexahydrophthalic anhydride or/and modified methyl hexahydrophthalic anhydride.
In some embodiments of the invention, the accelerator is included in any one or two of YQ-668L, ZYH-10C.
In some embodiments of the invention, the defoamer is selected from BYK-9920, BYK-525, BYK-501, or a combination thereof.
The preparation method of the glue solution for resisting resin cracking of the high-pressure composite gas cylinder comprises the following steps of:
step 1, respectively heating epoxy resin to reduce viscosity;
and 2, adding the epoxy resin and the curing agent processed in the step 1 into a glue preparation barrel according to a proportion, uniformly stirring at a high speed, adding an accelerator and a defoaming agent according to a proportion, stirring at a high speed again, and standing to obtain the glue solution for resisting resin cracking of the high-pressure composite gas cylinder.
In some embodiments of the invention, the stirring time of the epoxy resin and the curing agent in the glue preparation barrel is 3-5 minutes, the stirring time is 8-10 minutes after the accelerator and the defoamer are added, and the mixture is kept stand for 8-10 minutes after the stirring is finished.
In some embodiments of the present invention, in step 1, the epoxy resin is heated at 40-60 ℃ for 0.5-5 hours; preferably, the epoxy resin is placed in an oven at the temperature of 40-60 ℃ to be heated for 1-3 hours; more preferably, the epoxy resin is heated in an oven at 50 ℃ for 1-2 hours.
In some embodiments of the invention, in the step 2, the speed of the two times of high-speed stirring is 800-1500 r/min; preferably 1000 r/min.
In some embodiments of the present invention, when the viscosity of the accelerator is too high to facilitate stirring, the accelerator can be heated to reduce the viscosity, and then weighed and stirred.
The method for curing the high-pressure composite gas cylinder by adopting the glue solution comprises the following steps:
s1, impregnating a winding fiber in a glue groove with glue solution, and winding the winding fiber on a liner of a high-pressure composite gas cylinder to form a composite winding layer;
s2, placing the high-pressure composite gas cylinder liner processed in the step S1 in a curing furnace, and curing the glue solution in a temperature programming mode.
The invention adopts a temperature programming mode during curing to release heat smoothly, improve the shrinkage stress of a cured product and prevent cracking.
In some embodiments of the invention, in the step 2, when the glue solution is cured, the temperature is raised from the normal temperature to 75-100 ℃, the temperature is maintained for 0.5-4 hours, and then the temperature is raised to 120-160 ℃, and the temperature is maintained for 1-5 hours; the heating rate is 0.5-2 ℃/min.
Preferably, in the step 2, when the glue solution is cured, the temperature is raised from the normal temperature to 85-100 ℃, the temperature is maintained for 0.5-1 hour, then the temperature is raised to 120-130 ℃, and the temperature is maintained for 4-5 hours; the heating rate is 1-1.5 ℃/min.
In some embodiments of the invention, in the step 2, when the glue solution is cured, the temperature is first raised from room temperature to 75-100 ℃, the temperature is maintained for 1-2 hours, then raised to 110-.
Compared with the prior art, the invention has the following beneficial effects:
the invention has scientific design, reasonable formula and simple operation. The glue solution of the invention has long operable time. The gas cylinder is wound by the glue solution wet method, the surface of the gas cylinder has no crack after self-tightening water pressure, the fatigue and the bursting strength are not reduced, the glass transition temperature of a system is not reduced, the gas cylinder can be quickly infiltrated, no bubble exists after curing, the surface is transparent and does not turn white, and the appearance is more attractive.
The invention adopts a temperature programming method for curing, can release heat slowly, improves the shrinkage stress of a cured product and prevents cracking.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The accelerator YQ-668L, ZYH-10C in the embodiment of the invention is produced by Yuqi composite material Co., Ltd in city;
defoaming agents BYK-9920, BYK-525 and BYK-501 were produced by Pico adjuvant (Shanghai) Co., Ltd.
Example 1
The embodiment discloses a preparation method of glue solution, which comprises the following raw materials in parts by weight:
epoxy resin CYD-127100 parts; the epoxy equivalent is 180-190g/mol, the viscosity (25 ℃) is 8000-11000 mpa.s;
70 parts of curing agent, wherein the content of the methyl tetrahydrophthalic anhydride is 70 percent, and the content of the methyl hexahydrophthalic anhydride is 30 percent;
2 parts of accelerator YQ-668L;
and defoaming agent BYK-99200.5 parts.
The preparation method comprises the following specific steps:
heating epoxy resin CYD-127 in a 50 ℃ oven for 2 hours;
heating accelerator YQ-668L in an oven at 90 ℃ for 2 hours;
adding the heated epoxy resin and curing agent into a glue blending barrel according to a proportion, and stirring at a high speed of 1000r/min for 5 minutes; then adding an accelerator and a defoaming agent in proportion, and stirring at the high speed of 1000r/min for 10 minutes again; standing for 10 minutes to obtain the resin cracking resistant glue solution for the high-pressure composite gas cylinder.
Example 2
In this example, the composition and the ratio of the raw materials were different from those in example 1, and the other conditions were the same. In the embodiment, epoxy resin CYD-127100 parts; the epoxy equivalent is 180-190g/mol, the viscosity (25 ℃) is 8000-11000 mpa.s;
90 parts of curing agent, wherein the content of the methyl tetrahydrophthalic anhydride is 60 percent, and the content of the methyl hexahydrophthalic anhydride is 40 percent;
0.8 part of accelerator YQ-668L;
and defoaming agent BYK-5010.2 parts.
Example 3
In this example, the glue solution comprises the following raw materials in parts by weight: epoxy resin CYD-128100 parts; the epoxy equivalent is 184-194g/mol, the viscosity (25 ℃) is 11000-14000 mpa.s;
80 parts of curing agent, wherein the modified methyl tetrahydrophthalic anhydride accounts for 60 percent, and the modified methyl hexahydrophthalic anhydride accounts for 40 percent;
1 part of accelerator ZYH-10C;
defoaming agent BYK-5251.
In this example, the glue solution was used at room temperature without first heating the accelerator, and the rest conditions were the same as in example 1.
Example 4
In this example, the preparation was carried out under the same conditions as in example 1 except that the respective parameters were different. In the present embodiment, the first and second electrodes are,
placing the epoxy resin CYD-127 in an oven at 60 ℃ to be heated for 0.5 hour;
heating accelerator YQ-668L in an oven at 100 ℃ for 0.5 hour;
adding the heated epoxy resin and curing agent into a glue blending barrel according to a proportion, and stirring at a high speed of 800r/min for 3 minutes; then adding an accelerator and a defoaming agent in proportion, and stirring at a high speed of 800r/min for 8 minutes again; standing for 8 minutes to obtain the glue solution for resisting resin cracking of the high-pressure composite gas cylinder.
Example 5
In this example, the preparation was carried out under the same conditions as in example 1 except that the respective parameters were different. In the present embodiment, the first and second electrodes are,
placing the epoxy resin CYD-127 in an oven at 40 ℃ to be heated for 5 hours;
heating accelerator YQ-668L in an oven at 80 ℃ for 5 hours;
adding the heated epoxy resin and curing agent into a glue blending barrel according to a proportion, and stirring at a high speed of 1500r/min for 5 minutes; then adding an accelerator and a defoaming agent according to the proportion, and stirring at the high speed of 1500r/min for 8 minutes again; standing for 10 minutes to obtain the resin cracking resistant glue solution for the high-pressure composite gas cylinder.
Example 6
The embodiment discloses a method for winding and curing a 70MPa hydrogen storage cylinder by using a glue solution prepared by the method in the embodiment 1, which comprises the following steps:
winding: pouring the glue solution prepared by the method in the embodiment 1 into a glue dipping tank, heating in a water bath, keeping the temperature of the glue solution at 35 +/-5 ℃, and winding the carbon fibers on an aluminum alloy inner container under the tension of 20-40N according to a set layering process after dipping the glue solution in the glue dipping tank to form a composite winding layer with the thickness of 30-40 mm;
and (3) curing: placing the inner container wound with the fibers in a curing furnace to cure the glue solution; the curing system is as follows: heating to 90 ℃ at normal temperature, and keeping the temperature for 2 hours; then heating to 110 ℃, and preserving the heat for 1 hour; finally, heating to 140 ℃, and preserving heat for 2 hours; the rate of temperature rise was 1 deg.C/min.
Example 7
The embodiment discloses a method for winding and curing a 70MPa hydrogen storage cylinder by using a glue solution prepared by the method of the embodiment 2, which comprises the following steps:
winding: winding step as in example 6;
and (3) curing: placing the inner container wound with the fibers in a curing furnace to cure the glue solution; the curing system is as follows: heating to 75 ℃ at normal temperature, and keeping the temperature for 1 hour; then heating to 120 ℃, and preserving the heat for 2.5 hours; finally, the temperature is raised to 160 ℃, the temperature is maintained for 1 hour, and the temperature rise rate is 1.5 ℃/minute.
Example 8
The embodiment discloses a method for winding and curing a 70MPa hydrogen storage cylinder by using a glue solution prepared by the method in the embodiment 3, which comprises the following steps:
winding: winding step as in example 6;
and (3) curing: placing the inner container wound with the fibers in a curing furnace to cure the glue solution; the curing system is as follows: heating to 100 deg.C at normal temperature, holding for 0.5 hr, heating to 120 deg.C, holding for 5 hr at a heating rate of 1 deg.C/min.
Example 9
The embodiment discloses a method for winding and curing a 70MPa hydrogen storage cylinder by using a glue solution prepared by the method of embodiment 4, which comprises the following steps:
winding: winding step as in example 6;
and (3) curing: placing the inner container wound with the fibers in a curing furnace to cure the glue solution; the curing system is as follows: heating to 85 deg.C at normal temperature, holding for 1 hr, heating to 130 deg.C, holding for 3 hr, and heating at a rate of 1 deg.C/min.
Comparative example 1
Compared with the example 1, 10 parts of nitrile rubber serving as a toughening agent is added in the glue solution formula. Compared with the preparation method of the epoxy resin curing agent, the preparation method of the epoxy resin curing agent is that the nitrile rubber, the accelerator and the defoaming agent are added into the mixture of the epoxy resin and the curing agent which is stirred uniformly, the mixture is stirred again, and the other conditions are consistent.
The glue solution prepared by the comparative example is adopted to wind and solidify the 70MPa hydrogen storage cylinder, and the winding and solidification method is the same as that of the example 6.
Comparative example 2
Compared with the embodiment 6, the comparative example does not adopt a temperature programming method for curing, but places the liner wound with the fiber in a curing furnace, and heats the liner from normal temperature to 140 ℃ and keeps the temperature for 4 hours, wherein the heating rate is 1 ℃/minute, and the other conditions are consistent.
Comparative example 3
Compared with example 1, the comparative example has no accelerator added and the other conditions are consistent.
The viscosities of the respective dopes obtained in examples 1 to 3 and comparative example 3 were measured at respective time points in accordance with the method described in ISO 3219, and the pot life was examined by the change in viscosity. The results are shown in table 1:
TABLE 1
Note: when the viscosity is lower than 1400mpa.s, the glue solution has good operability.
As can be seen from Table 1, the glue solution of the invention has a low curing speed and still has good operability after 24 hours; comparative example 3, in which no accelerator was added, was faster in curing speed and did not have good workability in 4 hours. The glue solution of the invention has the unexpected effect of prolonging the curing time of the glue solution at normal temperature.
The high-pressure composite gas cylinders obtained in examples 6 to 9 and comparative examples 1 to 2 were evaluated for quality, and the results are shown in Table 2:
TABLE 2
In table 2, the appearance is: the surface of the gas cylinder after self-tightening water pressure.
The fatigue test times are as follows: testing according to the method recorded in GB/T9252;
water pressure blasting pressure value: testing according to the method described in GB/T15385;
tg: the test was carried out according to the method described in GB/T19466.2.
As can be seen from Table 2, the appearance of the adhesive solution and the curing system of the invention is good, no crack exists, and the surface is transparent; good bursting and fatigue properties and high glass transition temperature.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. The glue solution for resisting resin cracking of the high-pressure composite gas cylinder is characterized by comprising epoxy resin, a curing agent, an accelerant and a defoaming agent;
wherein, the dosage of the curing agent is 60 to 95 percent of the mass of the epoxy resin, the dosage of the accelerating agent is 0.5 to 3 percent of the mass of the epoxy resin, and the dosage of the defoaming agent is 0.1 to 1 percent of the mass of the epoxy resin.
2. The glue solution for resisting resin cracking of the high-pressure composite gas cylinder according to claim 1, wherein the amount of the curing agent is 70-90% of the mass of the epoxy resin, the amount of the accelerator is 0.8-2% of the mass of the epoxy resin, and the amount of the defoamer is 0.2-0.6% of the mass of the epoxy resin.
3. The glue solution for preventing resin cracking of the high-pressure composite gas cylinder according to claim 1 or 2, wherein the epoxy resin comprises any one or more of bisphenol A epoxy resin, modified bisphenol A epoxy resin and bisphenol F type epoxy resin; preferably, a bisphenol a epoxy resin; more preferably, epoxy resin CYD-128 or epoxy resin CYD-127.
4. The glue solution for resisting resin cracking of the high-pressure composite gas cylinder according to claim 3, wherein the curing agent comprises one or two of methyl tetrahydrophthalic anhydride and modified methyl tetrahydrophthalic anhydride, and one or two of methyl hexahydrophthalic anhydride and modified methyl hexahydrophthalic anhydride; preferably, the total mass of the curing agent is 100%, and the total mass of the curing agent is 60% -70% of methyl tetrahydrophthalic anhydride or/and modified methyl tetrahydrophthalic anhydride and 30% -40% of methyl hexahydrophthalic anhydride or/and modified methyl hexahydrophthalic anhydride.
5. The preparation method of the glue solution for resisting resin cracking of the high-pressure composite gas cylinder according to any one of claims 1 to 4 is characterized by comprising the following steps of:
step 1, heating the epoxy resin to reduce the viscosity;
and 2, adding the epoxy resin and the curing agent processed in the step 1 into a glue preparation barrel according to a proportion, uniformly stirring at a high speed, adding an accelerator and a defoaming agent according to a proportion, stirring at a high speed again, and standing to obtain the glue solution for resisting resin cracking of the high-pressure composite gas cylinder.
6. The preparation method of the glue solution for resisting resin cracking of the high-pressure composite gas cylinder according to claim 5, wherein in the step 1, the epoxy resin is heated for 0.5-5 hours at 40-60 ℃; preferably, the epoxy resin is placed in an oven at the temperature of 40-60 ℃ to be heated for 1-3 hours; more preferably, the epoxy resin is heated in an oven at 50 ℃ for 1-2 hours.
7. The preparation method of the glue solution for resisting resin cracking of the high-pressure composite gas cylinder according to claim 5 or 6, characterized in that in the step 2, the speed of two times of high-speed stirring is 800-1500 r/min; preferably 1000 r/min.
8. The method for curing the high-pressure composite gas cylinder by adopting the glue solution of any one of claims 1 to 4 is characterized by comprising the following steps of:
s1, impregnating a winding fiber in a glue groove with glue solution, and winding the winding fiber on a liner of a high-pressure composite gas cylinder to form a composite winding layer;
s2, placing the high-pressure composite gas cylinder liner processed in the step S1 in a curing furnace, and curing the glue solution in a temperature programming mode.
9. The curing method according to claim 8, wherein in the step 2, when the glue solution is cured, the temperature is raised to 75-100 ℃ from the normal temperature, the heat is preserved for 0.5-4 hours, then the temperature is raised to 120-160 ℃, and the heat is preserved for 1-5 hours; the heating rate is 0.5-2 ℃/min;
preferably, in the step 2, when the glue solution is cured, the temperature is raised from the normal temperature to 85-100 ℃, the temperature is maintained for 0.5-1 hour, then the temperature is raised to 120-130 ℃, and the temperature is maintained for 4-5 hours; the heating rate is 1-1.5 ℃/min.
10. The curing method according to claim 8, wherein in the step 2,
heating to 75-100 deg.C at normal temperature, maintaining for 1-2 hr, heating to 110-.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111087761A (en) * | 2019-12-31 | 2020-05-01 | 华东理工大学华昌聚合物有限公司 | Epoxy resin and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111087761A (en) * | 2019-12-31 | 2020-05-01 | 华东理工大学华昌聚合物有限公司 | Epoxy resin and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 齐磊等: "碳纤维缠绕气瓶用环氧树脂体系的固化工艺研究", 《纤维复合材料》, vol. 1, no. 1, pages 113 - 2 * |
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