Lightweight protective armor containing recoverable resin-based composite material

Abstract

The invention provides a lightweight protective armor containing a recoverable resin-based composite material, the outer surfaces of three plate layers are wrapped by a crack arrest layer, the three plate layers are composed of an impact surface layer, a middle transition layer and a back elastic surface bottom layer which are sequentially glued and laid, the crack arrest layer is made of carbon fiber cloth, and the middle transition layer is made of carbon fiber cloth. The impact surface layer is prepared from degradable thermosetting resin, graphene and carbon fiber cloth; the middle transition layer is made of degradable thermosetting resin, carbon fiber cloth and aramid fiber cloth; the back elastic surface bottom layer is made of degradable thermosetting resin and high-strength and high-modulus polyethylene fiber cloth. The invention further provides a preparation method and application of the light-weight protective armor containing the recoverable resin-based composite material, and the light-weight protective armor is used for individual bulletproof equipment or light-weight protective vehicles and used for resisting impact of 7.62 mm rifle bullets. The invention is suitable for bulletproof equipment, protective vehicles and other fields with high requirements on protective performance and material recoverability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of protective armor, and particularly relates to a lightweight protective armor containing a recyclable resin-based composite material and a preparation method and application thereof. BACKGROUND

[0002] In the field of protective armor, traditional metal armor such as steel armor has high protective performance, but has the problem of heavy weight, which seriously limits its use in some weight-sensitive application scenarios, such as low-altitude economic unmanned aerial vehicles, light protective vehicles, etc. To solve the problem of weight of metal armor, fiber-reinforced resin-based composite materials are gradually applied in the field of protective armor, among which carbon fiber, ultra-high-strength and high-modulus polyethylene fiber, etc. are widely concerned due to their high strength and toughness. However, the existing fiber-reinforced resin-based composite material protective armor has technical barriers: on the one hand, the impact resistance of the composite material needs to be further improved to effectively resist the impact of high-speed projectiles; on the other hand, high-value-added fibers are difficult to recycle after use, causing resource waste and environmental pollution, and increasing the use cost, which limits the sustainable development of such materials in the field of protective armor. Therefore, it is of great significance to develop a lightweight protective armor with excellent impact resistance and recyclability and a preparation method thereof. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a lightweight protective armor containing a recyclable resin-based composite material and a preparation method and application thereof to solve the problems of heavy weight, insufficient impact resistance and difficulty in recycling of existing protective armor, realize lightweight, high impact resistance and full life cycle recyclability of protective armor, and provide an innovative solution for the sustainable development of bulletproof equipment.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is: a lightweight protective armor containing a recyclable resin-based composite material, the lightweight protective armor containing a recyclable resin-based composite material is wrapped by a crack stopping layer on the outer surface of three layers of board layers, the three layers of board layers are composed of an impact surface skin layer, an intermediate transition layer and a back bullet surface bottom layer which are sequentially glued and laid; The material of the crack stopping layer is carbon fiber cloth; The impact surface skin layer is made of the following raw materials by weight: 400-700 parts of degradable thermosetting resin, 25-30 parts of graphene, and 650-700 parts of carbon fiber cloth; The intermediate transition layer is made of the following raw materials by weight: 350-800 parts of degradable thermosetting resin, 300-400 parts of carbon fiber cloth, and 300-550 parts of aramid fiber cloth; The back elastic surface bottom layer is made of the following raw materials by weight: 400-650 parts of degradable thermosetting resin, 600-800 parts of high-strength and high-modulus polyethylene fiber cloth.

[0005] Preferably, the glue joint adopts degradable thermosetting resin.

[0006] Preferably, the glue joint adopts degradable thermosetting resin, and the amount of glue applied is 30%-40% of the total mass of the impact surface surface layer, the intermediate transition layer and the back elastic surface bottom layer.

[0007] Preferably, the degradable thermosetting resin is an epoxy resin cross-linked and cured with polyetheramine as a cross-linking curing agent.

[0008] Preferably, the modulus of the polyethylene fiber in the high-strength and high-modulus polyethylene fiber cloth is 1000D.

[0009] The application also provides a method for manufacturing the lightweight protective armor containing the recyclable resin-based composite material. S1, preparation of the impact surface surface layer: S101, heat and melt the degradable thermosetting resin at a temperature of 100 DEG C, add graphene, stir, and obtain a mixed pre-cured resin liquid; S102, place a single layer of carbon fiber cloth on a mold, coat the mixed pre-cured resin liquid obtained in S101 on the single layer of carbon fiber cloth, and place it at room temperature for pre-curing to obtain a pre-cured carbon fiber cloth a; S103, sequentially place multiple layers of the pre-cured carbon fiber cloth a obtained in S102 in a mold, and hot-press to form an impact surface surface layer; S2, preparation of the intermediate transition layer: S201, heat and melt the degradable thermosetting resin at a temperature of 100 DEG C, and coat it on the surface of a single layer of carbon fiber cloth and a single layer of aramid fiber cloth, respectively, and after pre-curing at room temperature, obtain a pre-cured carbon fiber cloth b and a pre-cured aramid fiber cloth, respectively; S202, alternately stack the pre-cured carbon fiber cloth b and the pre-cured aramid fiber cloth obtained in S201 in a mold, and hot-press to form an intermediate transition layer; S3, preparation of the back elastic surface bottom layer: S301, heat and melt the degradable thermosetting resin at a temperature of 100 DEG C, and coat it on the surface of a high-strength and high-modulus polyethylene fiber cloth, and after pre-curing at room temperature, obtain a pre-cured high-strength and high-modulus polyethylene fiber cloth; S302, sequentially place multiple layers of the pre-cured high-strength and high-modulus polyethylene fiber cloth obtained in S301 in a mold, and hot-press to form a back elastic surface bottom layer; S4, laying of the three-layer plate: The surface layer of the impact surface obtained in S103, the intermediate transition layer obtained in S202 and the back impact surface bottom layer obtained in S302 are coated with the heat-melted degradable thermosetting resin, and then are sequentially glued and laid to obtain a three-layer plate; S5, wrapping the outer surface of the three-layer plate obtained in S4 with a crack-arresting layer, and hot-pressing and curing to obtain a lightweight protective armor containing a recyclable resin-based composite material.

[0010] Preferably, the stirring rate in S101 is 300r / min-400r / min, and the stirring time is 30min-40min.

[0011] Preferably, the pre-curing time in S102, S201 and S301 is 30min-40min; the hot-pressing conditions in S103, S202 and S302 are: temperature 150℃, pressure 10MPa, time 30min; and the hot-pressing and curing conditions in S5 are: temperature 150℃, pressure 0.6MPa, time 60min.

[0012] Preferably, the weight of the lightweight protective armor containing a recyclable resin-based composite material in S5 is 3.3kg / m 2 -4.6kg / m 2 .

[0013] The application also provides the use of the above-mentioned lightweight protective armor containing a recyclable resin-based composite material, which is applied to individual body bulletproof equipment or light protective vehicles for resisting 7.62mm rifle bullet impact.

[0014] Compared with the prior art, the application has the following advantages: 1. High impact resistance: the application adopts a three-layer gradient structure (three-layer plate) design, combines the high strength and toughness of graphene, carbon fiber and ultra-high strength and high modulus polyethylene fiber, and adopts a gradient energy absorption mechanism, so that the protective armor can effectively resist 7.62mm rifle bullet impact. The impact surface layer first resists the bullet, the intermediate transition layer further absorbs the remaining energy, and the back impact surface bottom layer buffers the remaining impact, which gradually improves the overall impact resistance.

[0015] 2. Full life cycle recyclability: the application introduces degradable thermosetting resin as the matrix, so that the composite material can be degraded by a specific chemical or physical method after use, thereby separating the high-value-added fiber, and the fiber recovery rate reaches 88%-90%, solving the problem of recycling high-value-added fiber and realizing the full life cycle recyclability of the material, which is environmentally friendly and economical.

[0016] 3. Lightweight: the total weight of the lightweight protective armor containing recyclable resin-based composite material of the application is less than or equal to 5 kg / m 2 , which is 70% lighter than traditional metal armor, effectively reducing the weight of the equipment, and is suitable for weight-sensitive application scenarios such as individual bulletproof equipment and light armored vehicles, improving the mobility and convenience of the equipment.

[0017] 4. The lightweight protective armor containing recyclable resin-based composite material of the application breaks through the technical barriers of fiber-reinforced resin-based applications in the field of protective armor, combines degradable thermosetting resin with various high-performance fibers, and provides an innovative solution for the sustainable development of bulletproof equipment, with broad application prospects and market value. The application will be further described in detail below with reference to the examples. DETAILED DESCRIPTION

[0018] Example 1 The lightweight protective armor containing recyclable resin-based composite material of the present embodiment is wrapped with a crack-arresting layer on the outer surface of three layers of board layers, which are composed of an impact surface skin layer, an intermediate transition layer and a back bullet surface bottom layer laid in turn and glued; The material of the crack-arresting layer is carbon fiber cloth; The impact surface skin layer is made of the following raw materials by weight: degradable thermosetting resin 400g, graphene 25g, carbon fiber cloth 650g; The intermediate transition layer is made of the following raw materials by weight: degradable thermosetting resin 350g, carbon fiber cloth 400g, aramid fiber cloth 300g; The back bullet surface bottom layer is made of the following raw materials by weight: degradable thermosetting resin 400g, high-strength high-modulus polyethylene fiber cloth 600g; In this embodiment, the glueing uses degradable thermosetting resin, and the glueing amount of the degradable thermosetting resin is 30% of the total mass of the impact surface skin layer, the intermediate transition layer and the back bullet surface bottom layer; In this embodiment, the degradable thermosetting resin is a thermosetting epoxy resin obtained by crosslinking and curing epoxy resin E-51 with polyetheramine D230 as a crosslinking curing agent, and the mass ratio of polyetheramine D230 to epoxy resin E-51 is 0.45:1; Polyetheramine D230 and epoxy resin E-51 are purchased from Shandong Kaisaimai New Material Co., Ltd.; In this embodiment, the modulus of the polyethylene fiber in the high-strength high-modulus polyethylene fiber cloth is 1000D, which is commercially available and purchased from Guangdong Tevelon New Material Application Co., Ltd.; Graphene is commercially available and purchased from Shanghai Pantian Powder Material Co., Ltd.; Carbon fiber cloth is commercially available and purchased from Weihai Guangwei Composite Material Co., Ltd.; Aramid fiber cloth was commercially available, and was purchased from Weihai Guangwei Composite Material Co., Ltd.

[0019] The embodiment also provides a method for preparing the lightweight protective armor containing the recyclable resin-based composite material, and the method is as follows: S1, preparation of an impact surface layer: S101, the degradable thermosetting resin is heated and melted at a temperature of 100 DEG C, and graphene is added, and after stirring at a speed of 300 r / min for 30 min, a mixed pre-cured resin liquid is obtained; S102, a single-layer carbon fiber cloth is laid on a mold, and the mixed pre-cured resin liquid obtained in S101 is coated on the single-layer carbon fiber cloth, and pre-cured at room temperature to obtain a pre-cured carbon fiber cloth a; S103, a plurality of pre-cured carbon fiber cloths a obtained in S102 are sequentially laid in a mold and hot-pressed to obtain an impact surface layer; S2, preparation of an intermediate transition layer: S201, the degradable thermosetting resin is heated and melted at a temperature of 100 DEG C, and is coated on the surface of a single-layer carbon fiber cloth and a single-layer aramid fiber cloth respectively, and after pre-cured at room temperature, pre-cured carbon fiber cloth b and pre-cured aramid fiber cloth are obtained respectively; S202, the pre-cured carbon fiber cloth b and the pre-cured aramid fiber cloth obtained in S201 are alternately stacked on a mold and hot-pressed to obtain an intermediate transition layer; S3, preparation of a back elastic surface bottom layer: S301, the degradable thermosetting resin is heated and melted at a temperature of 100 DEG C, and is coated on the surface of a high-strength and high-modulus polyethylene fiber cloth, and after pre-cured at room temperature, a pre-cured high-strength and high-modulus polyethylene fiber cloth is obtained; S302, a plurality of pre-cured high-strength and high-modulus polyethylene fiber cloths obtained in S301 are sequentially laid in a mold and hot-pressed to obtain a back elastic surface bottom layer; S4, laying of a three-layer plate layer: The impact surface layer obtained in S103, the intermediate transition layer obtained in S202 and the back elastic surface bottom layer obtained in S302 are coated with a degradable thermosetting resin which is heated and melted, and are sequentially glued and laid to obtain a three-layer plate layer; S5, the outer surface of the three-layer plate layer obtained in S4 is wrapped with a crack stopping layer, and is hot-pressed and cured at a temperature of 150 DEG C and a pressure of 0.6 MPa for 60 min to obtain a lightweight protective armor containing a recyclable resin-based composite material.

[0020] The pre-curing time in S102, S201 and S301 is 30 minutes; the hot-pressing forming conditions in S103, S202 and S302 are: temperature 150°C, pressure 10 MPa, and time 30 minutes.

[0021] The lightweight protective armor prepared in the embodiment has an area of 3 m 2 and a thickness of 30 mm.

[0022] The lightweight protective armor prepared in the embodiment has a weight of 3.3 kg / m 2 , and a fiber (carbon fiber, aramid fiber, polyethylene fiber) recovery rate of 88%.

[0023] The degradable thermosetting resin in the embodiment can be degraded by a specific chemical or physical method after use, so as to separate high-value-added fibers, solve the problem of high-value-added fiber recovery, realize the full life cycle recyclability of the material, and have environmental protection and economy.

[0024] The lightweight protective armor prepared in the embodiment is used to resist 7.62 mm rifle bullet impact. When the lightweight protective armor is applied, the lightweight protective armor from the outside to the inside is sequentially wrapped with a crack stopping layer, then sequentially with an impact surface layer, an intermediate transition layer and a back surface layer, and the innermost layer close to the body side is wrapped with a crack stopping layer.

[0025] The lightweight protective armor prepared in the embodiment effectively reduces the weight of the equipment, is suitable for application scenarios sensitive to weight, such as individual bulletproof equipment and light armored vehicles, and improves the mobility and use convenience of the equipment.

[0026] The impact surface layer prepared in the embodiment is mainly composed of degradable thermosetting resin, graphene and carbon fiber cloth. The degradable thermosetting resin serves as a matrix and has good formability and certain strength, and can quickly transfer stress when impacted; graphene has excellent mechanical properties and thermal conductivity, which can enhance the strength and toughness of the composite material, and accelerate the dispersion of impact energy; carbon fiber has high strength and high modulus, which provides the surface layer with main impact resistance to effectively resist the initial impact of projectiles such as bullets.

[0027] The intermediate transition layer is composed of degradable thermosetting resin, carbon fiber and aramid fiber. The degradable thermosetting resin continues to act as a matrix to firmly bind the carbon fiber and aramid fiber together. The carbon fiber further enhances the structural strength, and the aramid fiber has super high toughness and impact resistance, capable of absorbing and dissipating impact energy. After the impact surface layer preliminarily resists the impact, the intermediate transition layer further absorbs the remaining energy and slows down the transmission of the impact.

[0028] The back-bounce surface bottom layer is composed of degradable thermosetting resin and ultra-high-strength and high-modulus polyethylene fiber. The degradable thermosetting resin plays a role in fixing and protecting the fiber, and the ultra-high-strength and high-modulus polyethylene fiber can effectively buffer impact energy due to its high toughness, preventing the armor back-bounce surface from excessive deformation and rupture, and protecting the protected object.

[0029] Finally, the whole is wrapped with a crack arrest layer. On the one hand, its toughness can effectively inhibit the further expansion of the broken area, prevent the rapid spread of cracks, and avoid the loss of protection function of the armor due to large-area fragmentation. On the other hand, the crack arrest layer can effectively bind the fragments generated by the fragmentation, greatly reducing the splashing of the fragments, thereby effectively avoiding the direct damage of these fragments to the internal structure and key components of the fuselage, and further providing reliable protection for the fuselage to ensure its normal operation in complex and dangerous environments.

[0030] The lightweight protective armor containing the recyclable resin-based composite material prepared in this embodiment can solve the problems of existing protective armor such as large weight, insufficient impact resistance, and difficulty in recycling of fibers, and realize lightweight, high impact resistance, and full life cycle recyclability of the protective armor, providing an innovative solution for the sustainable development of bulletproof equipment.

[0031] Embodiment 2 The lightweight protective armor containing the recyclable resin-based composite material of this embodiment is wrapped with a crack arrest layer on the outer surface of a three-layer plate layer composed of an impact surface layer, an intermediate transition layer and a back-bounce surface bottom layer laid and glued in sequence. The material of the crack arrest layer is carbon fiber cloth; The impact surface layer is made of the following raw materials by weight: degradable thermosetting resin 700g, graphene 30g, carbon fiber cloth 700g; The intermediate transition layer is made of the following raw materials by weight: degradable thermosetting resin 800g, carbon fiber cloth 300g, aramid fiber cloth 550g; The back-bounce surface bottom layer is made of the following raw materials by weight: degradable thermosetting resin 650g, high-strength and high-modulus polyethylene fiber cloth 800g; In this embodiment, the adhesive uses degradable thermosetting resin, and the adhesive amount of the degradable thermosetting resin is 35% of the total mass of the surface layer of the impact surface, the intermediate transition layer and the bottom layer of the back elastic surface; In this embodiment, the degradable thermosetting resin is an epoxy resin E-51 cross-linked and cured with polyetheramine D230 as a cross-linking curing agent, and the mass ratio of polyetheramine D230 to epoxy resin E-51 is 0.45:1; Polyetheramine D230 and epoxy resin E-51 are purchased from Shandong Kessmai New Material Co., Ltd. In this embodiment, the modulus of the polyethylene fiber in the high-strength and high-modulus polyethylene fiber cloth is 1000D, which is commercially available and purchased from Guangdong Tevelon New Material Application Co., Ltd. Graphene is commercially available and purchased from Shanghai Pantian Powder Material Co., Ltd. Carbon fiber cloth is commercially available and purchased from Weihai Guangwei Composite Material Co., Ltd. Aramid fiber cloth is commercially available and purchased from Weihai Guangwei Composite Material Co., Ltd.

[0032] The embodiment also provides a method for preparing the lightweight protective armor containing the recyclable resin-based composite material, and the method comprises the following steps: S1, preparation of the surface layer of the impact surface: S101, heat and melt the degradable thermosetting resin at a temperature of 100°C, add graphene, and stir at a speed of 400 r / min for 30 min to obtain a mixed pre-cured resin liquid; S102, place a single layer of carbon fiber cloth on a mold, coat the mixed pre-cured resin liquid obtained in S101 on the single layer of carbon fiber cloth, and pre-cure at room temperature to obtain a pre-cured carbon fiber cloth a; S103, sequentially place multiple layers of the pre-cured carbon fiber cloth a obtained in S102 in a mold, and hot-press to form an impact surface layer; S2, preparation of the intermediate transition layer: S201, heat and melt the degradable thermosetting resin at a temperature of 100°C, and coat the single layer of carbon fiber cloth and the single layer of aramid fiber cloth on the surface, respectively, and pre-cure at room temperature to obtain a pre-cured carbon fiber cloth b and a pre-cured aramid fiber cloth, respectively; S202, alternately stack the pre-cured carbon fiber cloth b and the pre-cured aramid fiber cloth obtained in S201 on a mold, and hot-press to form an intermediate transition layer; S3, preparation of the bottom layer of the back elastic surface: S301, heat and melt the degradable thermosetting resin at a temperature of 100°C, coat the high-strength and high-modulus polyethylene fiber cloth on the surface, and pre-cure at room temperature to obtain a pre-cured high-strength and high-modulus polyethylene fiber cloth; S302, sequentially lay the pre-solidified high-strength and high-modulus polyethylene fiber cloth obtained in S301 in the mold, hot-press to form a back-springing surface bottom layer; S4, laying of the three-layer board layer: After the impact surface surface layer obtained in S103, the intermediate transition layer obtained in S202 and the back-springing surface bottom layer obtained in S302 are coated with a heated and melted degradable thermosetting resin, they are sequentially laid and glued to obtain a three-layer board layer; S5, wrapping the outer surface of the three-layer board layer obtained in S4 with a crack-arresting layer, and hot-pressing and curing at a temperature of 150°C and a pressure of 0.6MPa for 60min to obtain a lightweight protective armor containing a recyclable resin-based composite material.

[0033] In this embodiment, the pre-solidification time in S102, S201 and S301 is 35min; the hot-pressing conditions in S103, S202 and S302 are: temperature 150°C, pressure 10MPa, time 30min.

[0034] The lightweight protective armor containing a recyclable resin-based composite material prepared in this embodiment has an area of 5 m 2 and a thickness of 30mm.

[0035] The weight of the lightweight protective armor containing a recyclable resin-based composite material prepared in this embodiment is 4.6kg / m 2 , and the fiber (carbon fiber, aramid fiber, polyethylene fiber) recovery rate is 89%.

[0036] The lightweight protective armor containing a recyclable resin-based composite material prepared in this embodiment is applied to individual body bulletproof equipment or light protective vehicles to resist 7.62mm rifle bullet impact.

[0037] Embodiment 3 The lightweight protective armor containing a recyclable resin-based composite material of this embodiment is wrapped with a crack-arresting layer on the outer surface of a three-layer board layer, which is composed of an impact surface surface layer, an intermediate transition layer and a back-springing surface bottom layer laid and glued in sequence; The material of the crack-arresting layer is carbon fiber cloth; The impact surface surface layer is made of the following raw materials by weight: degradable thermosetting resin 500g, graphene 27g, carbon fiber cloth 680g; The intermediate transition layer is made of the following raw materials by weight: degradable thermosetting resin 600g, carbon fiber cloth 350g, aramid fiber cloth 450g; The back elastic surface bottom layer is made of raw materials with the following weights: 500 g of degradable thermosetting resin and 700 g of high-strength and high-modulus polyethylene fiber cloth; In this embodiment, the glueing adopts degradable thermosetting resin, and the glueing amount is 40% of the total mass of the impact surface surface layer, the intermediate transition layer and the back elastic surface bottom layer; In this embodiment, the degradable thermosetting resin is an epoxy resin E-51 cross-linked and cured with polyetheramine D230 as a cross-linking curing agent to obtain a recyclable thermosetting epoxy resin, and the mass ratio of polyetheramine D230 to epoxy resin E-51 is 0.45:1; The polyetheramine D230 and the epoxy resin E-51 are both purchased from Shandong Kaisaimai New Material Co., Ltd. In this embodiment, the polyethylene fiber in the high-strength and high-modulus polyethylene fiber cloth has a modulus of 1000D, which is commercially available and purchased from Guangdong Tevelon New Material Application Co., Ltd. The graphene is commercially available and purchased from Shanghai Pantian Powder Material Co., Ltd. The carbon fiber cloth is commercially available and purchased from Weihai Guangwei Composite Material Co., Ltd. The aramid fiber cloth is commercially available and purchased from Weihai Guangwei Composite Material Co., Ltd.

[0038] The embodiment also provides a method for preparing the lightweight protective armor containing the recyclable resin-based composite material. S1, preparation of the impact surface surface layer: S101, heat and melt the degradable thermosetting resin at a temperature of 100°C, add graphene, and stir at a speed of 350 r / min for 35 min to obtain a mixed pre-cured resin liquid; S102, place a single layer of carbon fiber cloth on a mold, coat the mixed pre-cured resin liquid obtained in S101 on the single layer of carbon fiber cloth, and pre-cure at room temperature to obtain pre-cured carbon fiber cloth a; S103, sequentially place multiple layers of the pre-cured carbon fiber cloth a obtained in S102 in a mold, and hot-press to obtain the impact surface surface layer; S2, preparation of the intermediate transition layer: S201, heat and melt the degradable thermosetting resin at a temperature of 100°C, and coat on the surfaces of single-layer carbon fiber cloth and single-layer aramid fiber cloth respectively, and pre-cure at room temperature to obtain pre-cured carbon fiber cloth b and pre-cured aramid fiber cloth respectively; S202, alternately stack the pre-cured carbon fiber cloth b and the pre-cured aramid fiber cloth obtained in S201 on a mold, and hot-press to obtain the intermediate transition layer; S3, preparation of the back elastic surface bottom layer: S301, heat and melt the degradable thermosetting resin at a temperature of 100 DEG C, coat the surface of the high-strength and high-modulus polyethylene fiber cloth, and obtain a pre-solidified high-strength and high-modulus polyethylene fiber cloth after pre-solidification at room temperature; S302, sequentially lay the pre-solidified high-strength and high-modulus polyethylene fiber cloth obtained in S301 in a mold, and heat-press to form a back-spring surface bottom layer; S4, laying of the three-layer plate layer: After coating the surfaces of the impact surface surface layer obtained in S103, the intermediate transition layer obtained in S202 and the back-spring surface bottom layer obtained in S302 with the heat-melted degradable thermosetting resin, sequentially lay and glue joint to obtain a three-layer plate layer; S5, wrap the outer surface of the three-layer plate layer obtained in S4 with a crack-arresting layer, heat-press and cure at a temperature of 150 DEG C and a pressure of 0.6 MPa for 60 min to obtain a lightweight protective armor containing a recyclable resin-based composite material.

[0039] In this embodiment, the pre-solidification time in S102, S201 and S301 is 40 min; the heat-pressing forming conditions in S103, S201 and S302 are a temperature of 150 DEG C, a pressure of 10 MPa and a time of 30 min.

[0040] The lightweight protective armor containing a recyclable resin-based composite material prepared in this embodiment has an area of 4 m 2 and a thickness of 30 mm. The weight of the lightweight protective armor containing a recyclable resin-based composite material prepared in this embodiment is 3.8 kg / m 2 , and the fiber (carbon fiber, aramid fiber, polyethylene fiber) recovery rate is 90%.

[0041] The degradable thermosetting resin in this embodiment can be degraded by a specific chemical or physical method after use, so as to separate high-value-added fibers, solve the problem of high-value-added fiber recovery, realize the full life cycle recyclability of the material, and have environmental protection and economy.

[0042] The lightweight protective armor containing a recyclable resin-based composite material prepared in this embodiment is applied to individual bulletproof equipment or light protective vehicles, and is used to resist 7.62 mm rifle bullet impact.

[0043] The above is only a preferred embodiment of the present application, and does not limit the present application. Any simple modification, change and equivalent change of the above embodiment according to the technical essence of the present application still belongs to the protection scope of the technical solution of the present application.

Claims

1. A lightweight protective armor comprising a recyclable resin-based composite material, characterized in that, The lightweight protective armor containing the recyclable resin-based composite material is wrapped with a crack-arresting layer on the outer surface of a three-layer board layer, and the three-layer board layer is composed of an impact surface layer, an intermediate transition layer and a back elastic surface bottom layer which are sequentially glued and laid; The material of the crack-arresting layer is carbon fiber cloth; The impact surface layer is made from the following raw materials in parts by weight: 400-700 parts of degradable thermosetting resin, 25-30 parts of graphene, and 650-700 parts of carbon fiber cloth; The intermediate transition layer is made from the following raw materials in parts by weight: 350-800 parts of degradable thermosetting resin, 300-400 parts of carbon fiber cloth, and 300-550 parts of aramid fiber cloth; The back elastic surface bottom layer is made from the following raw materials in parts by weight: 400-650 parts of degradable thermosetting resin, and 600-800 parts of high-strength and high-modulus polyethylene fiber cloth.

2. A lightweight armor containing a recyclable resin-based composite material according to claim 1, characterized by, The gluing uses degradable thermosetting resin.

3. A lightweight armor containing a recyclable resin-based composite material according to claim 2, characterized by, The amount of degradable thermosetting resin used for gluing is 30-40% of the total mass of the impact surface layer, the intermediate transition layer and the back elastic surface bottom layer.

4. The lightweight armor containing recyclable resin-based composite material according to claim 1, characterized by, The degradable thermosetting resin is an epoxy resin cross-linked and cured by using polyetheramine as a cross-linking curing agent.

5. The lightweight armor containing a recyclable resin-based composite material according to claim 1, characterized by, The modulus of the polyethylene fiber in the high-strength and high-modulus polyethylene fiber cloth is 1000D.

6. A method of manufacturing a lightweight protective armor comprising a recyclable resin-based composite material as claimed in any one of claims 1 to 5, characterized in that, The method is: S1, preparation of the impact surface layer: S101, heat and melt the degradable thermosetting resin at a temperature of 100°C, add graphene, stir, and obtain a mixed pre-cured resin liquid; S102, lay a single layer of carbon fiber cloth on a mold, coat the mixed pre-cured resin liquid obtained in S101 on the single layer of carbon fiber cloth, and pre-cure at room temperature to obtain a pre-cured carbon fiber cloth a; S103, sequentially lay multiple layers of the pre-cured carbon fiber cloth a obtained in S102 on a mold, and hot-press to obtain the impact surface layer; S2, preparation of the intermediate transition layer: S201, heat and melt the degradable thermosetting resin at a temperature of 100°C, and coat it on the surface of a single layer of carbon fiber cloth and a single layer of aramid fiber cloth, respectively, and pre-cure at room temperature to obtain a pre-cured carbon fiber cloth b and a pre-cured aramid fiber cloth, respectively; S202, alternately stack the pre-cured carbon fiber cloth b and the pre-cured aramid fiber cloth obtained in S201 on a mold, and hot-press to obtain the intermediate transition layer; S3, preparation of the back elastic surface bottom layer: S301, heat and melt the degradable thermosetting resin at a temperature of 100°C, and coat it on the surface of the high-strength and high-modulus polyethylene fiber cloth, and pre-cure at room temperature to obtain a pre-cured high-strength and high-modulus polyethylene fiber cloth; S302, sequentially lay multiple layers of the pre-cured high-strength and high-modulus polyethylene fiber cloth obtained in S301 on a mold, and hot-press to obtain the back elastic surface bottom layer; S4, laying of the three-layer board layer: After coating the surfaces of the impact surface layer obtained in S103, the intermediate transition layer obtained in S202 and the back elastic surface bottom layer obtained in S302 with the heat-melted degradable thermosetting resin, sequentially glue and lay them to obtain the three-layer board layer; S5, wrap the outer surface of the three-layer board layer obtained in S4 with the crack-arresting layer, and hot-press to obtain the lightweight protective armor containing the recyclable resin-based composite material.

7. The method of claim 6, wherein, The stirring rate in S101 is 300 r / min to 400 r / min, and the stirring time is 30 min to 40 min.

8. The method of claim 6, wherein, The pre-curing time in S102, S201 and S301 is 30 min to 40 min; the hot-pressing forming condition in S103, S202 and S302 is that the temperature is 150 DEG C, the pressure is 10 MPa, and the time is 30 min; the hot-pressing curing condition in S5 is that the temperature is 150 DEG C, the pressure is 0.6 MPa, and the time is 60 min.

9. The method of claim 6, wherein, The lightweight protective armor of S5 containing the recyclable resin-based composite material has a weight of 3.3 kg / m 2 ~ 4.6 kg / m 2 .

10. Use of a lightweight armor comprising a recyclable resin-based composite material as claimed in any one of claims 1-5, characterized in that, The lightweight protective armor containing the recyclable resin-based composite material is applied to individual bulletproof equipment or light protective vehicles, and is used for resisting 7.62 mm rifle bullet impact.