A plastic liner carbon fiber reinforced thermoplastic resin based composite hydrogen storage bottle

Abstract

This invention discloses a hydrogen storage bottle with a plastic liner and carbon fiber reinforced thermoplastic resin matrix composite material, comprising a metal bottle mouth, a plastic liner, and a carbon fiber reinforced thermoplastic resin matrix composite material layer. The metal bottle mouth is connected to the plastic liner, and the carbon fiber reinforced thermoplastic resin matrix composite material layer is disposed on the outer surface of the plastic liner. The carbon fiber reinforced thermoplastic resin matrix composite material layer is formed in situ on the outer surface of the plastic liner by carbon fiber reinforced thermoplastic resin prepreg tape or carbon fiber reinforced thermoplastic resin prepreg filament. The hydrogen storage bottle with a plastic liner and carbon fiber reinforced thermoplastic resin matrix composite material provided by this invention has good fusion between the plastic liner and the carbon fiber reinforced thermoplastic resin matrix composite material layer, is lightweight, has a long fatigue life, and is easy to recycle after product disposal. Furthermore, the carbon fiber reinforced thermoplastic resin matrix composite material layer in this hydrogen storage bottle is formed by in-situ molding technology, automatically laid or automatically wound while heating, which improves production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of high-pressure gas cylinders, and in particular relates to a hydrogen storage bottle with a plastic liner and carbon fiber reinforced thermoplastic resin-based composite material. Background Art

[0002] Carbon fiber wrapped composite gas cylinders have better performance than commonly used steel cylinders or aluminum alloy seamless gas cylinders, such as light weight, high strength, good corrosion resistance, high safety, etc. For example, the Chinese patent document with publication number CN103499013A discloses a carbon fiber composite high-pressure gas cylinder, which includes a metal liner, and a wrapped carbon fiber composite layer and an outer protective layer sequentially arranged on the outer surface of the metal liner; wherein the preparation process of the wrapped carbon fiber composite layer is: epoxy resin and curing agent are mixed to obtain a colloidal solution, and short-cut carbon fibers are added to the colloidal solution to obtain an epoxy resin impregnation liquid, and then continuous carbon fibers are impregnated with the epoxy resin impregnation liquid, and then wrapped on the outer surface of the metal liner, and the excess resin is removed by curing to obtain a wrapped carbon fiber composite layer; the Chinese patent document with publication number CN111396740A discloses a reinforced resin and wrapped carbon fiber composite gas storage cylinder, the gas storage cylinder is wrapped with graphene epoxy resin The invention discloses a high-pressure gas cylinder doped with short-cut carbon fiber reinforced ribs, which comprises a metal liner, a wound carbon fiber composite layer and an outer protective layer, and a carbon nanotube epoxy resin layer or a short-cut fiber epoxy resin layer and a wound carbon fiber. The epoxy resin enters the pores of the wound carbon fiber to form an epoxy resin layer and a wound carbon fiber reinforcement layer that alternately wrap the gas cylinder. The gas cylinder in the invention includes: a metal gas cylinder, a plastic gas cylinder, an inner plastic outer metal gas cylinder, etc. The Chinese patent document with the publication number CN103383058A discloses a short-cut carbon fiber doped reinforced rib type gas cylinder, which comprises a metal liner, and a wound carbon fiber composite layer and an outer protective layer sequentially arranged on the outer surface of the metal liner. The outer surface of the barrel section of the metal liner is machined with spiral or annular reinforcement ribs. When the continuous carbon fiber used in the wound carbon fiber composite layer is impregnated with an epoxy resin impregnation liquid, the epoxy resin impregnation liquid contains short-cut carbon fibers. The gas cylinder liner and the wound composite layer provided in the above-mentioned prior art are prone to delamination. At the same time, the epoxy resin is a thermosetting resin, which becomes an insoluble and infusible polymer with a three-dimensional network structure after curing, and it is difficult to recycle the product after it is scrapped.

[0003] The plastic liner carbon fiber reinforced composite hydrogen storage bottle is a lightweight hydrogen storage device, mainly used to provide hydrogen for hydrogen energy vehicles. The outer composite material layer of this type of hydrogen storage bottle is usually made of carbon fiber impregnated with epoxy resin glue online, which is wound on the surface of the plastic liner and then cured; because the resin matrix used in the composite layer is thermosetting epoxy resin, there is a weak interface at the junction with the thermoplastic plastic layer of the liner, which leads to the delamination failure between the plastic liner and the wound composite layer of this type of hydrogen storage bottle during high-pressure fatigue testing or work, which reduces the service life and increases the safety risk; in addition, this type of gas cylinder is first wound and then cured, which has off-site curing, low production efficiency, and difficult to recycle after the product is scrapped. Therefore, it is of high practical promotion value to prepare a plastic liner carbon fiber reinforced composite hydrogen storage bottle with light weight, high strength, simple molding process, and good connection and assembly performance. Summary of the invention

[0004] In order to solve the problems of weak interfaces between layers of plastic liner carbon fiber reinforced composite hydrogen storage bottles in the prior art, as well as off-situ curing and low production efficiency in the production process, the present invention provides a plastic liner carbon fiber reinforced thermoplastic resin-based composite hydrogen storage bottle, which has light weight, strong interlayer bonding, high production efficiency and long fatigue life.

[0005] The specific technical solutions adopted are as follows:

[0006] A plastic liner carbon fiber reinforced thermoplastic resin-based composite material hydrogen storage bottle, comprising a metal bottle mouth, a plastic liner and a carbon fiber reinforced thermoplastic resin-based composite material layer; the metal bottle mouth is connected to the plastic liner, and the carbon fiber reinforced thermoplastic resin-based composite material layer is arranged on the outer surface of the plastic liner;

[0007] The carbon fiber reinforced thermoplastic resin-based composite material layer is obtained by in-situ molding a carbon fiber reinforced thermoplastic resin prepreg tape or a carbon fiber reinforced thermoplastic resin prepreg yarn on the outer surface of the plastic liner.

[0008] The present invention designs a plastic liner carbon fiber reinforced thermoplastic resin-based composite hydrogen storage bottle with strong interlayer bonding force, wherein the carbon fiber reinforced thermoplastic resin-based composite material layer has better fusion properties with the plastic liner than the existing epoxy resin layer, and is manufactured using in-situ molding technology, thus avoiding the off-situ curing problem caused by the process of first winding and then curing.

[0009] Preferably, the metal bottle mouth and the plastic liner are integrally formed by injection molding, rotational molding or blow molding. The integrated molding process can ensure that the plastic liner and the metal bottle mouth are well combined to avoid poor secondary connection assembly and leakage.

[0010] The plastic liner is made of nylon 6, high-density polyethylene, polyphenylene sulfide, polybutylene terephthalate or polyoxymethylene.

[0011] Preferably, the plastic liner is made of nylon 6 to ensure the material's toughness, resistance to high and low temperature aging, resistance to low temperature impact, and fatigue performance during hydrogen charging and discharging.

[0012] Further preferably, the carbon fiber reinforced thermoplastic resin prepreg tape or carbon fiber reinforced thermoplastic resin prepreg yarn has a thermoplastic resin content of 30%-40%. When the thermoplastic resin is within the corresponding content range, the strength, fatigue life and other properties of the hydrogen storage bottle are better.

[0013] The carbon fiber reinforced thermoplastic resin prepreg tape or carbon fiber reinforced thermoplastic resin prepreg yarn is obtained by impregnating carbon fiber tape or carbon fiber yarn with thermoplastic resin, wherein the thermoplastic resin is the same as the material of the plastic liner, or other thermoplastic resins similar to the material of the plastic liner can also be selected.

[0014] Specifically, when the material of the plastic liner is nylon 6, the thermoplastic resin can be nylon 6 or a thermoplastic resin that is similarly compatible with nylon 6; when the material of the plastic liner is high-density polyethylene, the thermoplastic resin can be high-density polyethylene or a thermoplastic resin that is similarly compatible with high-density polyethylene; when the material of the plastic liner is polyphenylene sulfide, the thermoplastic resin can be polyphenylene sulfide or a thermoplastic resin that is similarly compatible with polyphenylene sulfide; when the material of the plastic liner is polybutylene terephthalate, the thermoplastic resin can be polybutylene terephthalate or a thermoplastic resin that is similarly compatible with polybutylene terephthalate; when the material of the plastic liner is polyformaldehyde, the thermoplastic resin can be polyformaldehyde or a thermoplastic resin that is similarly compatible with polyformaldehyde.

[0015] The in-situ forming process is: the carbon fiber reinforced thermoplastic resin prepreg tape or carbon fiber reinforced thermoplastic resin prepreg wire is automatically laid or automatically wound on the outer surface of the plastic liner while being heated.

[0016] Preferably, the carbon fiber reinforced thermoplastic resin prepreg tape or prepreg filament is heated by using a laser, infrared or flame heating source.

[0017] Preferably, the heating temperature is 150-400°C.

[0018] The plastic liner carbon fiber reinforced thermoplastic resin-based composite material hydrogen storage bottle provided by the present invention can be used to store high-pressure gaseous hydrogen of 70MPa or above.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The plastic liner carbon fiber reinforced thermoplastic resin-based composite material hydrogen storage bottle provided by the present invention has good fusion between the plastic liner and the carbon fiber reinforced thermoplastic resin-based composite material layer, is light in weight, has a long fatigue life, and is easy to recycle after the product is scrapped.

[0021] (2) The present invention adopts in-situ forming technology to prepare a carbon fiber reinforced thermoplastic resin-based composite material layer by automatic laying or automatic winding while heating, and has high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The schematic diagram of the structure of the plastic liner carbon fiber reinforced thermoplastic resin based composite hydrogen storage bottle in Example 1-2 includes a plastic liner 1, a metal bottle mouth 2, and a carbon fiber reinforced thermoplastic resin based composite layer 3. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0024] like Figure 1 As shown, a plastic liner carbon fiber reinforced thermoplastic resin-based composite hydrogen storage bottle includes a plastic liner 1, a metal bottle mouth 2 and a carbon fiber reinforced thermoplastic resin-based composite layer 3. The metal bottle mouth is connected to the plastic liner, and a carbon fiber reinforced thermoplastic resin-based composite layer is arranged on the outer surface of the plastic liner.

[0025] Example 1

[0026] In this embodiment, the plastic liner is made of nylon 6, and the plastic liner and the metal bottle mouth are integrally formed by injection molding to ensure that the plastic liner and the metal bottle mouth are well combined to avoid poor secondary connection assembly and leakage.

[0027] The carbon fiber reinforced thermoplastic resin matrix composite material layer is formed by automatic placement in-situ molding using T700 carbon fiber reinforced nylon 6 resin prepreg tape (width (6.35±0.01) mm, thickness (0.16±0.01) mm, thermoplastic resin content (34±3)%), which is made by impregnating carbon fiber dry filaments in thermoplastic resin nylon 6. Among them, the automatic placement in-situ molding adopts laser heating, and the T700 carbon fiber reinforced nylon 6 resin prepreg tape is laid on the surface of the nylon 6 plastic liner while heating (heating temperature 370-400℃). The specific laying scheme is obtained by simulation optimization design.

[0028] Example 2

[0029] In this embodiment, the plastic liner is made of polyoxymethylene (POM), and the plastic liner and the metal bottle mouth are integrally formed by injection molding.

[0030] The carbon fiber reinforced thermoplastic resin matrix composite material layer is formed by automatic placement in-situ molding using T700 carbon fiber reinforced POM resin prepreg tape (width (6.35±0.01) mm, thickness (0.16±0.01) mm, thermoplastic resin content (34±3)%, and carbon fiber dry filaments impregnated in thermoplastic resin (POM)). The automatic placement in-situ molding uses laser heating to lay T700 carbon fiber reinforced polyoxymethylene (POM) resin prepreg tape on the surface of the polyoxymethylene plastic liner while heating (heating temperature 170-200°C). The specific laying scheme is obtained by simulation optimization design.

[0031] The embodiments described above provide a detailed description of the technical solutions of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, supplements or similar substitutions made within the scope of the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic liner carbon fiber reinforced thermoplastic resin based composite material hydrogen storage bottle, characterized in that: It comprises a metal bottle mouth, a plastic liner and a carbon fiber reinforced thermoplastic resin-based composite material layer; the metal bottle mouth is connected to the plastic liner, and the carbon fiber reinforced thermoplastic resin-based composite material layer is arranged on the outer surface of the plastic liner; The carbon fiber reinforced thermoplastic resin-based composite material layer is obtained by in-situ molding a carbon fiber reinforced thermoplastic resin prepreg tape or a carbon fiber reinforced thermoplastic resin prepreg yarn on the outer surface of the plastic liner; The metal bottle mouth and the plastic liner are integrally formed by injection molding, rotational molding or blow molding; The carbon fiber reinforced thermoplastic resin prepreg tape or carbon fiber reinforced thermoplastic resin prepreg yarn has a thermoplastic resin content of 30%-40%; The in-situ forming process is as follows: the carbon fiber reinforced thermoplastic resin prepreg tape or carbon fiber reinforced thermoplastic resin prepreg yarn is automatically laid or automatically wound on the outer surface of the plastic liner while being heated; The plastic liner carbon fiber reinforced thermoplastic resin-based composite material hydrogen storage bottle is used to store high-pressure gaseous hydrogen of 70MPa and above; The plastic liner is made of nylon 6 or polyoxymethylene; the thermoplastic resin is the same as the plastic liner; when the thermoplastic resin is nylon 6, the heating temperature is 370-400°C; when the thermoplastic resin is polyoxymethylene, the heating temperature is 170-200°C.

2. The plastic liner carbon fiber reinforced thermoplastic resin based composite material hydrogen storage bottle according to claim 1, characterized in that: The carbon fiber reinforced thermoplastic resin prepreg tape or carbon fiber reinforced thermoplastic resin prepreg filament is heated by using a laser, infrared or flame heating source.

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