Firefighter outer shell fabric yarn, preparation method, fabric and firefighter suit

Abstract

The application provides a preparation method of a fire-fighting garment outer layer fabric yarn with a combustion response, comprising the following steps: S1, mixing a two-dimensional transition metal carbide / nitride water dispersion liquid with a graphene oxide solution, and stirring for 1-5 hours to form a uniform dispersion liquid A; S2, dissolving sodium alginate in deionized water, fully dissolving for 8-12 hours, and standing to remove bubbles to obtain a dispersion liquid B; S3, using a microporous limited coating method, coating the yarn of the fire-fighting garment outer layer flame-retardant fabric with the dispersion liquid A, coating the yarn of the fire-fighting garment outer layer flame-retardant fabric with the dispersion liquid A and drying to form a GO coating yarn; coating the GO coating yarn with the dispersion liquid B, and coagulating in a calcium chloride coagulation bath to form a SA coating / GO coating yarn with a coaxial sandwich structure. The modified yarn has a three-layer structure of the yarn of the fire-fighting garment outer layer flame-retardant fabric, a GO coating and a SA coating from inside to outside, and the prepared fire-fighting garment outer layer fabric has a flame-retardant and combustion response function.

Description

Technical Field

[0001] This invention relates to the field of intelligent electronic textile technology, and in particular to a yarn for the outer layer of a fire suit, a preparation method, the fabric, and the fire suit. Background Technology

[0002] Countless large and high-rise buildings worldwide are severely threatened by fire. Firefighting suits are essential equipment for firefighters during rescue and firefighting operations. They are crucial for protecting the personal safety of firefighters on the front lines of firefighting. Not only are they indispensable at fire rescue scenes, but they also serve as fireproof gear to protect firefighters from injury. Therefore, firefighting suits adapted for fire rescue operations are of paramount importance.

[0003] Generally, firefighter suits in my country consist of four layers: from the outside in, a flame-retardant layer, a waterproof and breathable layer, a heat insulation layer, and a comfort layer. The outer layer is typically made of single or double layers of flame-retardant fabric (such as meta-aramid), which prevents the flames from burning and spreading, and prevents molten dripping, thus ensuring the structural integrity and functionality of the firefighter suit during firefighting operations. The waterproof and breathable layer is often made of polytetrafluoroethylene (PTFE) microporous membrane composite flame-retardant nonwoven fabric. Its micropores effectively prevent water droplets from penetrating while allowing water vapor to escape, achieving a waterproof and breathable effect. The heat insulation layer is usually made of relatively thick flame-retardant nonwoven fabric, whose main function is to prevent heat transfer from the outside to the inside through a certain thickness of fabric, prolonging the time before firefighters suffer second-degree burns. The comfort layer is made of comfortable and soft fabrics such as flame-retardant viscose or flame-retardant cotton, and its function is to improve the wearing comfort of the firefighter suit. According to this four-layer structure, the main protective layer is the insulation layer, which is used to provide thermal protection for fire suits in a fire. However, due to the presence of the insulation layer, firefighters cannot accurately and in real time know the temperature of the outer layer of the fire suit, leading to their protective clothing being burned without their knowledge. Once the fire suit is damaged under high-temperature flames, the reduced protective ability of the suit makes firefighters extremely vulnerable to burns from the high-temperature flames, preventing them from evacuating safely.

[0004] Currently, the outer layer of firefighting suits is generally composed of single or double layers of flame-retardant fabric (such as meta-aramid), which serves to prevent the combustion and spread of flames and to prevent molten dripping. However, it lacks temperature sensing and combustion response capabilities. The lack of temperature sensing and combustion response in the outer layer of current firefighting suits highlights the urgent need to develop a combustion-responsive material that can be woven into firefighting suits. In emergency fire situations, this combustion-responsive material could promptly issue an alarm signal when the outermost layer of the fire protective suit is burned, alerting firefighters to evacuate to a safe location. Summary of the Invention

[0005] This invention provides a yarn for the outer layer of fire suit fabric, a preparation method, a fabric, and a fire suit, in order to solve the technical problem that the outer layer fabric of current fire suits lacks temperature sensing and combustion response functions.

[0006] The technical solution provided by this invention is as follows:

[0007] One object of the present invention is to provide a method for preparing a combustion-responsive outer layer fabric yarn for fire-fighting suits, the preparation method comprising the following steps:

[0008] S1. Mix the aqueous dispersion of two-dimensional transition metal carbides / nitrides with the graphene oxide solution and stir for 1 to 5 hours to form a uniform dispersion A;

[0009] S2. Dissolve sodium alginate in deionized water and allow it to dissolve completely for 8-12 hours. After standing to remove bubbles, obtain dispersion B.

[0010] S3. Using the microporous confined coating method, the yarn of the flame-retardant fabric of the outer layer of the fire suit is coated with the dispersion liquid A and dried to form GO coated yarn.

[0011] The GO coated yarn is coated with dispersion B by passing it through the micropore confined coating method, and then coagulated in a calcium chloride coagulation bath to form an SA-coated / GO-coated yarn with a coaxial sandwich structure.

[0012] Alternatively, a microfluidic continuous coating method can be used to introduce the yarn of the flame-retardant fabric of the outer layer of the fire suit and the dispersion liquid A into the first microchannel of the microfluidic chip, and the dispersion liquid B into the second microchannel of the microfluidic chip.

[0013] Furthermore, the yarn of the flame-retardant outer layer of the fire suit, the dispersion A, and the dispersion B are extruded together into a calcium chloride coagulation bath for coagulation to form SA-coated / GO-coated yarn with a coaxial sandwich structure.

[0014] In a preferred embodiment, the aqueous dispersion of the two-dimensional transition metal carbide / nitride contains 1% to 20% by mass.

[0015] The graphene oxide solution contains 10% to 25% graphene oxide by mass.

[0016] In a preferred embodiment, the sodium alginate is dissolved in deionized water, and the sodium alginate has a mass percentage content of 2% to 8%.

[0017] In a preferred embodiment, the micropore diameter selected by the micropore confinement coating method is 0.1 mm to 10 mm.

[0018] In a preferred embodiment, the calcium chloride coagulation bath contains 2% to 10% calcium chloride by mass.

[0019] In a preferred embodiment, the flame-retardant fiber material used for the yarn of the flame-retardant outer layer of the fire suit includes:

[0020] Flame-retardant viscose fiber, flame-retardant vinylon, flame-retardant polyester, flame-retardant nylon, aramid fiber, polyimide fiber, polybenzimidazole, poly(p-phenylenebenzodioxazole), polyphenylene sulfide, phenolic fiber, or melamine fiber, or one or more of these.

[0021] In a preferred embodiment, the dispersion A further includes at least one or more of silver nanowires, graphene, and carbon nanotubes.

[0022] Another object of the present invention is to provide a combustion-responsive outer layer fabric yarn for fire suits, wherein the outer layer fabric yarn for fire suits is prepared using a method for preparing a combustion-responsive outer layer fabric yarn for fire suits provided by the present invention.

[0023] Another object of the present invention is to provide a fire-responsive outer layer fabric for fire suits, said fire suit outer layer fabric being woven using a fire-responsive fire suit outer layer fabric yarn provided by the present invention.

[0024] Another object of the present invention is to provide a fire-responsive fire suit, said fire suit being prepared using the fire-responsive fire suit outer layer fabric provided by the present invention.

[0025] The above-described technical solution of the present invention has at least the following beneficial effects compared with the prior art:

[0026] This invention provides a fire suit outer layer fabric yarn, a preparation method, a fabric, and a fire suit. The fire suit outer layer fabric yarn is modified with a combustion response (SA-coated / GO-coated yarn with a coaxial sandwich structure). It has a three-layer structure from the inside out: the fire suit outer layer flame-retardant fabric yarn, the GO coating, and the SA coating. The resulting fire suit outer layer fabric is not only flame-retardant but also has a combustion response function. It can be powered by a 1-3V button battery and will issue an alarm to remind firefighters to evacuate in time when it is burned.

[0027] This invention provides a yarn for the outer layer of a fire suit, a preparation method, a fabric, and a fire suit. Based on the modification of graphene oxide and conductive components, the fiber acquires a response characteristic of rapid changes in combustion resistance, thereby providing an early warning of whether the outer layer of the fire suit has been burned and threatens the life safety of firefighters at the fire rescue scene, so that firefighters can escape the fire scene in time.

[0028] This invention provides a yarn for the outer layer of a fire-fighting suit, a preparation method, the fabric, and the suit itself. Graphene oxide is incorporated into the yarn of the flame-retardant outer layer of the fire-fighting suit as a combustion-responsive material. Graphene oxide exhibits a sensitive and significant electrical resistance response to external temperature stimuli. When exposed to flame, the oxygen-containing functional groups on the surface of graphene oxide are removed, resulting in a thermal reduction reaction. This manifests as a sharp decrease in the yarn's electrical resistance, thus giving the yarn combustion-responsive characteristics. Addressing the issues of the graphene oxide functional layer's brittleness and tendency to detach, as well as its poor washability and durability, this invention employs a microporous confined coating of sodium alginate to construct a coaxial sandwich structure. This further treats the functional yarn. Utilizing the intrinsic flame-retardant properties and high hygroscopicity of sodium alginate, the treated functional yarn becomes soft and easy to process while maintaining flame retardancy.

[0029] This invention provides a yarn for the outer layer of a fire suit, a preparation method, a fabric, and a fire suit. The preparation method has a simple process flow and high feasibility, and is suitable for mass industrial production. It is expected to be applied to existing fire suits to realize the functionality and intelligence of fire suits. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a process flow diagram of the microfluidic continuous coating method of the present invention.

[0032] Figure 2 This is a comparison of optical and electron microscope images of the yarn of the flame-retardant outer layer of the fire suit modified with dispersion liquid A, the yarn of the flame-retardant outer layer of the fire suit modified with dispersion liquid A and dispersion liquid B, and the SA / GO coated yarn with a coaxial sandwich structure, according to Embodiment 1 of the present invention.

[0033] Figure 3 This is a graph showing the tensile breaking strength of IP yarn, the tensile breaking strength of GO coated yarn, and the tensile breaking strength of SA coated / GO coated yarn with a coaxial sandwich structure after combustion, according to Embodiment 1 of the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or “connected,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0036] It should be noted that the terms "up", "down", "left", "right", "front", and "back" used in this invention are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0037] According to an embodiment of the present invention, a method for preparing a combustion-responsive outer layer fabric yarn for fire-fighting clothing is provided, comprising the following steps:

[0038] Step S1: Mix the aqueous dispersion of two-dimensional transition metal carbide / nitride (MXene) with the graphene oxide solution and stir for 1 to 5 hours to form a uniform dispersion A.

[0039] This invention uses two-dimensional transition metal carbides / nitrides (MXene) as conductive components, which are mixed with graphene oxide solution to prepare dispersion A.

[0040] In one embodiment, the conductive component of dispersion A further includes at least one or more of silver nanowires, graphene, and carbon nanotubes.

[0041] Furthermore, in the aqueous dispersion of two-dimensional transition metal carbides / nitrides (MXene), the mass percentage of two-dimensional transition metal carbides / nitrides (MXene) is 1% to 20%. In the graphene oxide solution, the mass percentage of graphene oxide is 10% to 25%.

[0042] Step S2: Dissolve sodium alginate in deionized water and allow it to dissolve completely for 8-12 hours. After standing to remove bubbles, dispersion B is obtained.

[0043] Furthermore, sodium alginate is dissolved in deionized water, wherein the mass percentage of sodium alginate is 2% to 8%.

[0044] Step S3: Using the microporous confined coating method, the yarn (IP yarn) of the flame-retardant fabric of the outer layer of the fire suit is coated with dispersion A and dried to form GO coated yarn (IP yarn modified by dispersion A).

[0045] The microporous confined coating method is used to coat GO coated yarn with dispersion B (IP yarn is modified by dispersion A and dispersion B), and then coagulate it in a calcium chloride coagulation bath to form SA coated / GO coated yarn with a coaxial sandwich structure.

[0046] In one embodiment, the micropore diameter selected for the micropore confinement coating method is 0.1 mm to 10 mm. The calcium chloride coagulation bath contains 2% to 10% calcium chloride by mass.

[0047] In one embodiment, the flame-retardant fiber material selected for the yarn (IP yarn) of the outer flame-retardant fabric of the fire suit includes:

[0048] Flame-retardant viscose fiber, flame-retardant vinylon, flame-retardant polyester, flame-retardant nylon, aramid fiber, polyimide fiber, polybenzimidazole, poly(p-phenylenebenzodioxazole), polyphenylene sulfide, phenolic fiber, or melamine fiber, or one or more of these.

[0049] The SA-coated / GO-coated yarn prepared by this invention has a three-layer structure from the inside out: yarn of the flame-retardant outer layer of fire suit fabric, GO coating, and SA coating.

[0050] In one embodiment, in step S3 above, a combustion-responsive outer layer fabric yarn for fire suits can also be prepared using a microfluidic continuous coating method.

[0051] like Figure 1 As shown, the microfluidic chip 100 is placed in a calcium chloride coagulation bath. The microfluidic chip 100 includes a first microchannel 101 and a second microchannel 102, with the first microchannel 101 connected to the second microchannel 102.

[0052] The yarn (IP yarn) of the flame-retardant outer layer of the fire suit and the dispersion liquid A are introduced into the first microchannel 101 of the microfluidic chip 100, and the dispersion liquid B is introduced into the second microchannel 102 of the microfluidic chip 100.

[0053] Furthermore, the yarn of the flame-retardant outer layer of the fire suit (IP yarn), dispersion A, and dispersion B are extruded together into a calcium chloride coagulation bath for coagulation, forming an SA-coated / GO-coated yarn with a coaxial sandwich structure. The SA-coated / GO-coated yarn with the coaxial sandwich structure is then wound using roller 200.

[0054] According to an embodiment of the present invention, a combustion-responsive outer layer fabric yarn for fire suits is provided, which is prepared using the preparation method of the combustion-responsive outer layer fabric yarn for fire suits provided by the present invention.

[0055] According to an embodiment of the present invention, a fire-responsive outer layer fabric for fire suits is provided, which is woven using the yarn of the fire-responsive outer layer fabric for fire suits provided by the present invention.

[0056] According to an embodiment of the present invention, a fire-responsive fire suit is provided, which is prepared using an outer layer fabric that provides a fire-responsive fire suit.

[0057] Example 1.

[0058] In this embodiment, the yarn (IP yarn) of the flame-retardant fabric of the outer layer of the fire suit is made of polyimide fiber, and the SA-coated / GO-coated yarn with a coaxial sandwich structure is prepared by microporous confined coating method, which is a combustion-responsive outer layer fabric yarn of the fire suit of the present invention.

[0059] Step S1: Mix an aqueous dispersion of 1% by mass of two-dimensional transition metal carbide / nitride (MXene) with a graphene oxide solution of 10% by mass, and stir for 4 hours to form a uniform dispersion A.

[0060] Step S2: Dissolve 2% sodium alginate in deionized water and allow it to dissolve completely for 8-12 hours. After standing to remove bubbles, dispersion B is obtained.

[0061] Step S3: Using the micropore confined coating method, the polyimide yarn (IP yarn) of the flame-retardant outer layer of the fire suit is passed through a micropore with a pore size of 4 mm, then through dispersion liquid A, and the polyimide yarn (IP yarn) of the flame-retardant outer layer of the fire suit is coated with dispersion liquid A and dried to form GO coated yarn (IP yarn modified by dispersion liquid A).

[0062] like Figure 2 As shown, Figure 2 (a) is an optical electron microscope image of the yarn of the flame-retardant outer layer of the fire suit modified by dispersion A.

[0063] The microporous confined coating method is used to coat GO coated yarn (IP yarn modified by dispersion A) with dispersion B, and then the GO coated yarn (IP yarn modified by dispersion A) is coated with dispersion B (IP yarn modified by both dispersion A and dispersion B). The mixture is then coagulated in a calcium chloride coagulation bath with a mass percentage of 3% to form SA coated / GO coated yarn with a coaxial sandwich structure.

[0064] like Figure 2 As shown, Figure 2 Image (b) is an optical electron microscope image of the yarn of the flame-retardant outer layer of the fire suit modified with dispersion A and dispersion B. Figure 2 (c) is an optical electron microscope of an SA-coated / GO-coated yarn with a coaxial sandwich structure.

[0065] like Figure 3 The figure shows the tensile breaking strength of IP yarn, the tensile breaking strength of GO coated yarn, and the tensile breaking strength curves of SA / GO coated yarn with a coaxial sandwich structure after combustion. Figure 3 As can be seen, the tensile breaking strength of the SA-coated / GO-coated yarn with coaxial sandwich structure after being burned by flame for 5s and 10s respectively is better than that of the yarn of the outer flame-retardant fabric of fire suit (IP yarn) and the tensile breaking strength of GO-coated yarn.

[0066] Example 2.

[0067] The difference between this embodiment and Embodiment 1 is that the yarn (IP yarn) of the flame-retardant fabric of the outer layer of the fire suit is meta-aramid yarn.

[0068] Step S1: Mix an aqueous dispersion of 1% by mass of two-dimensional transition metal carbide / nitride (MXene) with a graphene oxide solution of 10% by mass, and stir for 4 hours to form a uniform dispersion A.

[0069] Step S2: Dissolve 2% sodium alginate in deionized water and allow it to dissolve completely for 8-12 hours. After standing to remove bubbles, dispersion B is obtained.

[0070] Step S3: Using the micropore confined coating method, the meta-aramid yarn (IP yarn) of the flame-retardant outer layer of the fire suit is passed through a micropore with a diameter of 4 mm, then through dispersion liquid A, and coated with dispersion liquid A and dried to form GO coated yarn (IP yarn modified by dispersion liquid A).

[0071] The microporous confined coating method is used to coat GO coated yarn (IP yarn modified by dispersion A) with dispersion B, and then the GO coated yarn (IP yarn modified by dispersion A) is coated with dispersion B (IP yarn modified by both dispersion A and dispersion B). The mixture is then coagulated in a calcium chloride coagulation bath with a mass percentage of 3% to form SA coated / GO coated yarn with a coaxial sandwich structure.

[0072] Example 3.

[0073] The difference between this embodiment and Embodiment 2 is that dispersion A also includes a graphene aqueous dispersion.

[0074] Step S1: Mix an aqueous dispersion of 1% by mass of two-dimensional transition metal carbide / nitride (MXene), an aqueous dispersion of 2% by mass of graphene, and a graphene oxide solution of 10% by mass, and stir for 4 hours to form a uniform dispersion A.

[0075] Step S2: Dissolve 2% sodium alginate in deionized water and allow it to dissolve completely for 8-12 hours. After standing to remove bubbles, dispersion B is obtained.

[0076] Step S3: Using the micropore confined coating method, the meta-aramid yarn (IP yarn) of the flame-retardant outer layer of the fire suit is passed through a micropore with a diameter of 4 mm, then through dispersion liquid A, and coated with dispersion liquid A and dried to form GO coated yarn (IP yarn modified by dispersion liquid A).

[0077] The microporous confined coating method is used to coat GO coated yarn (IP yarn modified by dispersion A) with dispersion B, and then the GO coated yarn (IP yarn modified by dispersion A) is coated with dispersion B (IP yarn modified by both dispersion A and dispersion B). The mixture is then coagulated in a calcium chloride coagulation bath with a mass percentage of 3% to form SA coated / GO coated yarn with a coaxial sandwich structure.

[0078] Example 4.

[0079] The difference between this embodiment and Embodiment 1 is that dispersion A also includes a graphene aqueous dispersion.

[0080] Step S1: Mix an aqueous dispersion of 1% by mass of two-dimensional transition metal carbide / nitride (MXene), an aqueous dispersion of 2% by mass of graphene, and a solution of 10% by mass of graphene oxide, and stir for 4 hours to form a uniform dispersion A.

[0081] Step S2: Dissolve 2% sodium alginate in deionized water and allow it to dissolve completely for 8-12 hours. After standing to remove bubbles, dispersion B is obtained.

[0082] Step S3: Using the micropore confined coating method, the polyimide yarn (IP yarn) of the flame-retardant outer layer of the fire suit is passed through a micropore with a pore size of 4 mm, then through dispersion liquid A, and the polyimide yarn (IP yarn) of the flame-retardant outer layer of the fire suit is coated with dispersion liquid A and dried to form GO coated yarn (IP yarn modified by dispersion liquid A).

[0083] The microporous confined coating method is used to coat GO coated yarn (IP yarn modified by dispersion A) with dispersion B, and then the GO coated yarn (IP yarn modified by dispersion A) is coated with dispersion B (IP yarn modified by both dispersion A and dispersion B). The mixture is then coagulated in a calcium chloride coagulation bath with a mass percentage of 3% to form SA coated / GO coated yarn with a coaxial sandwich structure.

[0084] The following points need to be explained:

[0085] (1) The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention. Other structures can refer to the general design.

[0086] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the invention, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0087] (3) Where there is no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0088] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for preparing a combustion-responsive outer layer fabric yarn for fire-fighting suits, characterized in that, The preparation method includes the following steps: S1. Mix the aqueous dispersion of two-dimensional transition metal carbides / nitrides with the graphene oxide solution and stir for 1 to 5 hours to form a uniform dispersion A; S2. Dissolve sodium alginate in deionized water and allow it to dissolve completely for 8-12 hours. After standing to remove bubbles, obtain dispersion B. S3. Using the microporous confined coating method, the yarn of the flame-retardant fabric of the outer layer of the fire suit is coated with the dispersion liquid A and dried to form GO coated yarn. The GO coated yarn is coated with dispersion B by passing it through the micropore confined coating method, and then coagulated in a calcium chloride coagulation bath to form an SA-coated / GO-coated yarn with a coaxial sandwich structure. Alternatively, a microfluidic continuous coating method can be used to introduce the yarn of the flame-retardant fabric of the outer layer of the fire suit and the dispersion liquid A into the first microchannel of the microfluidic chip, and the dispersion liquid B into the second microchannel of the microfluidic chip. Furthermore, the yarn of the flame-retardant outer layer of the fire suit, the dispersion A, and the dispersion B are extruded together into a calcium chloride coagulation bath for coagulation to form SA-coated / GO-coated yarn with a coaxial sandwich structure.

2. The preparation method according to claim 1, characterized in that, In the aqueous dispersion of the two-dimensional transition metal carbide / nitride, the mass percentage of the two-dimensional transition metal carbide / nitride is 1% to 20%. The graphene oxide solution contains 10% to 25% graphene oxide by mass.

3. The preparation method according to claim 1, characterized in that, The sodium alginate is dissolved in deionized water, and the mass percentage of the sodium alginate is 2% to 8%.

4. The preparation method according to claim 1, characterized in that, The micropore diameter selected for the micropore confinement coating method is 0.1 mm to 10 mm.

5. The preparation method according to claim 1, characterized in that, The calcium chloride coagulation bath contains calcium chloride at a mass percentage of 2% to 10%.

6. The preparation method according to claim 1, characterized in that, The flame-retardant fiber materials used in the yarn of the flame-retardant outer layer of fire suits include: Flame-retardant viscose fiber, flame-retardant vinylon, flame-retardant polyester, flame-retardant nylon, aramid fiber, polyimide fiber, polybenzimidazole, poly(p-phenylenebenzodioxazole), polyphenylene sulfide, phenolic fiber, or melamine fiber, or one or more of these.

7. The preparation method according to claim 1, characterized in that, The dispersion A further includes at least one or more of silver nanowires, graphene, and carbon nanotubes.

8. A combustion-responsive outer layer fabric yarn for fire-fighting suits, characterized in that, The outer fabric yarn of the fire suit is prepared using the preparation method described in any one of claims 1 to 7.

9. A combustion-responsive outer layer fabric for fire-fighting suits, characterized in that, The outer fabric of the fire suit is woven using the yarn for the outer fabric of the fire suit as described in claim 8.

10. A fire-responsive suit, characterized in that, The fire suit is made using the outer fabric of the fire suit as described in claim 9.

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