Packaging paper for aerosol generating article and aerosol generating article

Abstract

This invention provides packaging paper for aerosol-generating products, a method for preparing the same, and the aerosol-generating product itself. The packaging paper for aerosol-generating products includes a base paper layer and a composite material layer formed on at least one of the upper and lower surfaces of the base paper layer. The composite material layer includes a two-dimensional nanosheet substrate and a non-silicon-based mesoporous material formed on the two-dimensional nanosheet substrate. According to the packaging paper for aerosol-generating products of this invention, by adjusting the proportion of the two-dimensional nanosheet substrate and the non-silicon-based mesoporous material formed on the two-dimensional nanosheet substrate in the composite material layer, the thermal conductivity of the composite material layer is uniformly controlled. This results in more uniform and controllable thermal conductivity during the inhalation of aerosol-generating products made from the packaging paper of this invention, effectively improving the release of smoke from the aerosol-generating product and the utilization of raw materials.

Description

Technical Field

[0001] This invention relates to the field of tobacco product technology, specifically to a packaging paper for aerosol-generating products, a method for preparing the same, and the aerosol-generating products. Background Technology

[0002] Aerosol-generating products mainly include tobacco products such as cigarettes, cigars, heated cigarettes, and e-cigarettes. These products generate aerosols by heating the tobacco raw material in the smoking section, which is then inhaled. Existing aerosol-generating products such as cigarettes and heated cigarettes typically have packaging paper, which mainly includes cigarette paper, forming paper, and tipping paper. In these aerosol-generating products, most of the tobacco raw material does not come into contact with the heating element; therefore, the heat transfer efficiency of the packaging paper plays a crucial role in smoke release and raw material utilization during inhalation.

[0003] The modified materials for packaging paper used in existing aerosol-generated products mainly include metal sheets or films, ceramics, or graphene. For example, patent application CN112367863B discloses a method of mixing aluminum foil and aluminum powder, after gelatinization, into pulp, and then obtaining packaging paper with improved thermal conductivity through a papermaking process. However, during the papermaking process, the adhesion rate of the thermally conductive material is difficult to control, and the uniformity of the thermal conductivity of the prepared packaging paper is difficult to regulate. Furthermore, the application of metal to the packaging paper poses risks to biosafety. Summary of the Invention

[0004] In view of this, the present invention provides a packaging paper for aerosol-generated products, a method for preparing the same, and an aerosol-generated product, which can uniformly control thermal conductivity.

[0005] To solve at least one of the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] According to a first aspect of the present invention, a packaging paper for an aerosol-generating article includes a base paper layer and a composite material layer formed on at least one of the upper and lower surfaces of the base paper layer.

[0007] The composite material layer includes a two-dimensional nanosheet substrate and a non-silicon-based mesoporous material formed on the two-dimensional nanosheet substrate.

[0008] Furthermore, the non-silicon-based mesoporous material is mesoporous carbon or transition metal oxide.

[0009] Furthermore, the two-dimensional nanosheet substrate is one of graphene, boron nitride, and MXene.

[0010] Furthermore, the base paper layer and the composite material layer are prevented from separating by physical and / or chemical methods.

[0011] Furthermore, the physical method is selected from one or more of lamination, hot pressing, cold pressing, and ultrasonic welding.

[0012] Furthermore, the chemical method is selected from one or more of surface activation treatment, plasma treatment, chemical plating, and microstructure modification.

[0013] Furthermore, the microstructure modification is selected from one or more of nano-coatings and surface microstructuring.

[0014] Furthermore, the lamination includes the addition of an adhesive.

[0015] Furthermore, the composite material layer also includes an adhesive.

[0016] Furthermore, the packaging paper is prepared by the following steps:

[0017] S1 provides the base paper layer;

[0018] S2, providing a slurry containing a two-dimensional nanosheet substrate on which a non-silicon-based mesoporous material is formed;

[0019] S3, the slurry is coated onto at least one of the upper and lower surfaces of the base paper layer and dried to form a composite material layer, thereby obtaining the packaging paper.

[0020] Furthermore, in step S2, the slurry further includes a dispersing solvent and / or a binder.

[0021] Further, in step S2, the two-dimensional nanosheet substrate is prepared by the following steps:

[0022] Prepare a dispersion of two-dimensional nanosheet substrate;

[0023] Prepare an emulsion of a non-silicon-based mesoporous material precursor prepolymer;

[0024] An emulsion of the two-dimensional nanosheet substrate dispersion and the non-silicon-based mesoporous material precursor prepolymer is mixed, a pH adjuster is added, and the mixture is sintered to obtain the two-dimensional nanosheet substrate.

[0025] Furthermore, the two-dimensional nanosheet substrate dispersion includes one or more of graphene dispersion, boron nitride dispersion, and MXene dispersion.

[0026] Furthermore, the emulsion of the non-silicon-based mesoporous material precursor prepolymer contains a pore-expanding agent, which is a methylbenzene organic small molecule pore-expanding agent selected from one or more of xylene, mesitylene, cyclohexane, and fatty acids.

[0027] Furthermore, the non-silicon-based mesoporous material precursor prepolymer is selected from one or more of the following: hydrochloride, hydrobromide, hydroiodide, phosphate, nitrate, sulfate, hydrogen sulfate, formate, acetate, adipate, benzoate, benzenesulfonate, toluenesulfonate, methanesulfonate, citrate, camphorate, fumarate, gluconate, maleate, oxalate, salicylate, and tartrate.

[0028] Furthermore, the amine containing the catechol structure is a catecholamine, which is selected from one or more of dopamine, norepinephrine, and epinephrine;

[0029] The non-silicon-based mesoporous material precursor prepolymer is formed by prepolymerization of a non-silicon-based mesoporous material precursor, wherein the non-silicon-based mesoporous material precursor is polydopamine or a polydopamine analogue.

[0030] According to a second aspect of the present invention, an aerosol-generating article includes packaging paper as described in any of the embodiments of the first aspect above.

[0031] Furthermore, the aerosol generating product also includes an aerosol generating matrix and a cigarette holder.

[0032] Furthermore, the packaging paper surrounds at least a portion of the aerosol generating matrix, or the packaging paper surrounds at least a portion of both the aerosol generating matrix and the mouthpiece to secure the mouthpiece to the aerosol generating matrix.

[0033] A method for preparing packaging paper for aerosol-generating articles according to a third aspect embodiment of the present invention includes the following steps:

[0034] S1 provides the base paper layer;

[0035] S2, providing a slurry containing a two-dimensional nanosheet substrate on which a non-silicon-based mesoporous material is formed;

[0036] S3, the slurry is coated onto at least one of the upper and lower surfaces of the base paper layer and dried to form a composite material layer, thereby obtaining the packaging paper.

[0037] Further, in step S2, the two-dimensional nanosheet substrate is prepared by the following steps:

[0038] Prepare a dispersion of two-dimensional nanosheet substrate;

[0039] Prepare an emulsion of a non-silicon-based mesoporous material precursor prepolymer;

[0040] An emulsion of the two-dimensional nanosheet substrate dispersion and the non-silicon-based mesoporous material precursor prepolymer is mixed, a pH adjuster is added, and the mixture is sintered to obtain the two-dimensional nanosheet substrate.

[0041] The above-described technical solution of the present invention has at least one of the following beneficial effects:

[0042] According to an embodiment of the present invention, a packaging paper for aerosol-generating articles is provided on at least one side surface of a base paper layer. The composite material layer contains a two-dimensional nanosheet substrate and a non-silicon-based mesoporous material formed on the two-dimensional nanosheet substrate. By adjusting the proportion of the two-dimensional nanosheet substrate and the non-silicon-based mesoporous material formed on the two-dimensional nanosheet substrate in the composite material layer, the thermal conductivity of the composite material layer is uniformly controlled. This makes the thermal conductivity more uniform and controllable during the inhalation of the aerosol-generating article made from the packaging paper of the present invention, effectively improving the release of smoke from the aerosol-generating article and the utilization of raw materials. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of packaging paper for aerosol-generating products according to an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of the structure of packaging paper for aerosol-generating products according to another embodiment of the present invention;

[0045] Figure 3 This is a flowchart illustrating a method for preparing packaging paper for aerosol-generating products according to an embodiment of the present invention.

[0046] Figure 4 This diagram shows the thermal conductivity of the finished product obtained by the method for preparing packaging paper for aerosol generation products according to an embodiment of the present invention.

[0047] Reference numerals: 1. Base paper layer; 2. Composite material layer. Detailed Implementation

[0048] 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 are within the scope of protection of the present invention.

[0049] 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. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0050] The following section will first combine the appendix. Figures 1-2 A detailed description of packaging paper for aerosol-generating articles according to embodiments of the present invention.

[0051] According to a first aspect of the present invention, a packaging paper for an aerosol-generating article includes a base paper layer 1 and a composite material layer 2 formed on at least one of the upper and lower surfaces of the base paper layer 1. That is, the composite material layer 2 can be provided on one surface of the base paper layer 1, or the composite material layer 2 can be provided on both surfaces of the base paper layer 1, depending on actual needs.

[0052] The composite material layer 2 includes a two-dimensional nanosheet substrate and a non-silicon-based mesoporous material formed on the two-dimensional nanosheet substrate.

[0053] In other words, according to an embodiment of the present invention, the packaging paper for aerosol generation products has a composite material layer 2 disposed on at least one side surface of the base paper layer 1. The composite material layer 2 contains a two-dimensional nanosheet substrate and a non-silicon-based mesoporous material formed on the two-dimensional nanosheet substrate. By adjusting the proportion of the two-dimensional nanosheet substrate and the non-silicon-based mesoporous material formed on the two-dimensional nanosheet substrate in the composite material layer 2, the thermal conductivity of the composite material layer 2 can be uniformly controlled. As a result, during the inhalation of the aerosol generation product made from the packaging paper of the present invention, the thermal conductivity is more uniform and controllable, effectively improving the smoke release of the aerosol generation product and the utilization of raw materials.

[0054] It should be noted that the base paper layer 1 is synthesized from cellulose, gum substances, and whitening substances.

[0055] It should be noted that the packaging paper used in the aerosol-generating products of this invention is made from materials free of heavy metals, thus ensuring high biosafety during the inhalation of the aerosol-generating products made from the packaging paper of this invention. Furthermore, the packaging paper used in the aerosol-generating products of this invention is suitable for inhalation at temperatures ranging from 150 to 400°C.

[0056] Preferably, the non-silicon-based mesoporous material is mesoporous carbon or transition metal oxide.

[0057] Preferably, the two-dimensional nanosheet substrate is one of graphene, boron nitride, and MXene (transition metal carbide / nitride / carbonitride).

[0058] Preferably, the base paper layer 1 and the composite material layer 2 are kept together by physical and / or chemical methods. That is, physical methods can be used to keep the base paper layer 1 and the composite material layer 2 together, chemical methods can be used to keep the base paper layer 1 and the composite material layer 2 together, or a combination of physical and chemical methods can be used to keep the base paper layer 1 and the composite material layer 2 together, thus making the application range wider.

[0059] Preferably, the physical method is selected from one or more of lamination, hot pressing, cold pressing, and ultrasonic welding. That is, one or more of lamination, hot pressing, cold pressing, and ultrasonic welding can be used to prevent the base paper layer 1 and the composite material layer 2 from separating.

[0060] Furthermore, lamination includes the addition of an adhesive. That is, when lamination is used to prevent the base paper layer 1 and the composite material layer 2 from separating, the addition of an adhesive further ensures that the base paper layer 1 and the composite material layer 2 remain in place.

[0061] Preferably, the chemical method is selected from one or more of surface activation treatment, plasma treatment, chemical plating, and microstructure modification. That is, one or more of surface activation treatment, plasma treatment, chemical plating, and microstructure modification can be used to prevent the base paper layer 1 and the composite material layer 2 from separating.

[0062] Furthermore, the microstructure modification is selected from one or more of nano-coatings and surface microstructuring. This better ensures that the base paper layer 1 and the composite material layer 2 do not separate.

[0063] In some embodiments, the composite material layer 2 further includes an adhesive. Preferably, the adhesive is selected from one or more of kaolin, bentonite, clay, sodium carboxymethyl cellulose, or sodium alginate. Using the above materials as adhesives provides good compatibility and adhesion with the paper fibers in the base paper layer 1.

[0064] In some embodiments, such as Figure 3 As shown, the packaging paper is prepared by the following steps:

[0065] S1 provides base paper layer 1;

[0066] S2 provides a slurry containing a two-dimensional nanosheet substrate on which a non-silicon-based mesoporous material is formed.

[0067] S3, the slurry is coated on at least one of the upper and lower surfaces of the base paper layer 1 and dried to form the composite material layer 2, thereby obtaining the packaging paper.

[0068] In some embodiments, in step S2, the slurry further includes a dispersing solvent and / or a binder.

[0069] In some embodiments, in step S2, the two-dimensional nanosheet substrate is prepared by the following steps:

[0070] Prepare a dispersion of two-dimensional nanosheet substrate;

[0071] Prepare an emulsion of a non-silicon-based mesoporous material precursor prepolymer;

[0072] A two-dimensional nanosheet substrate is obtained by mixing a dispersion of a two-dimensional nanosheet substrate and an emulsion of a non-silicon-based mesoporous material precursor prepolymer, adding a pH (power of hydrogen) adjuster, and sintering.

[0073] Preferably, the two-dimensional nanosheet substrate dispersion includes one or more of graphene dispersion, boron nitride dispersion, and MXene dispersion.

[0074] Preferably, the emulsion of the non-silicon-based mesoporous material precursor prepolymer contains a pore expander, wherein the pore expander is a methylbenzene organic small molecule pore expander, and the pore expander is selected from one or more of xylene, mesitylene, cyclohexane, and fatty acids.

[0075] Preferably, the non-silicon-based mesoporous material precursor prepolymer is selected from one or more of the following: hydrochloride, hydrobromide, hydroiodide, phosphate, nitrate, sulfate, hydrogen sulfate, formate, acetate, adipate, benzoate, benzenesulfonate, toluenesulfonate, methanesulfonate, citrate, camphorate, fumarate, gluconate, maleate, oxalate, salicylate, and tartrate.

[0076] Preferably, the amine containing the catechol structure is a catecholamine, which is selected from one or more of dopamine, norepinephrine, and epinephrine.

[0077] Preferably, the non-silicon-based mesoporous material precursor prepolymer is formed by prepolymerization of a non-silicon-based mesoporous material precursor, wherein the non-silicon-based mesoporous material precursor is polydopamine or a polydopamine analogue.

[0078] According to a second aspect of the present invention, an aerosol-generating article includes packaging paper as described in any of the embodiments of the first aspect above.

[0079] Furthermore, the aerosol-generating article also includes an aerosol-generating matrix and a mouthpiece. Specifically, packaging paper surrounds at least a portion of the aerosol-generating matrix, or packaging paper surrounds at least a portion of both the aerosol-generating matrix and the mouthpiece to secure the mouthpiece to the aerosol-generating matrix. This results in better thermal conductivity.

[0080] The term "aerosol-forming matrix" refers to a substance capable of generating or releasing aerosols. An aerosol-forming matrix can be a solid aerosol-forming matrix. An aerosol-forming matrix may include tobacco-containing materials containing volatile tobacco flavor compounds released from the matrix upon heating. An aerosol-forming matrix may also include non-tobacco materials. An aerosol-forming matrix may include aerosol-forming agents. Aerosol-forming agents may include polyols such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate; and fatty acid esters of monocarboxylic acids, dicarboxylic acids, or polycarboxylic acids, such as at least one of dimethyl dodecanoate and dimethyl tetradecanoate. In embodiments where the aerosol forming matrix is ​​a solid aerosol forming matrix, the solid aerosol forming matrix may include one or more of the following: powder, granules, microspheres, fragments, tubes, strips, or flakes, containing one or more of the following: herbaceous plant leaves, tobacco leaves, tobacco rib sheets, reconstituted tobacco, homogenized tobacco, extruded tobacco, and expanded tobacco. The solid aerosol forming matrix may be in a loose form. The aerosol forming matrix may include rods of the solid aerosol forming matrix. Packaging material may encapsulate the rods of the solid aerosol forming matrix.

[0081] The aerosol-generating matrix can also be a paste, gel, slurry, liquid, or any combination thereof comprising solid, paste, gel, slurry, and liquid compounds. Preferably, the aerosol-generating matrix is ​​a solid or gel composition. The aerosol-generating matrix may preferably include nicotine.

[0082] The term "cigarette mouthpiece" is used herein to refer to a part of an aerosol-generating article designed to come into contact with a consumer's mouth. A cigarette mouthpiece may be a portion of an aerosol-generating article that may include a filter, or in some cases, a cigarette mouthpiece may be defined by the scope of a tip-on package.

[0083] The method for preparing packaging paper according to the third aspect embodiment of the present invention, such as Figure 3 As shown, it includes the following steps:

[0084] S1 provides the base paper layer;

[0085] S2, providing a slurry containing a two-dimensional nanosheet substrate on which a non-silicon-based mesoporous material is formed;

[0086] S3, the slurry is coated onto at least one of the upper and lower surfaces of the base paper layer and dried to form a composite material layer, thereby obtaining the packaging paper.

[0087] Further, in step S2, the two-dimensional nanosheet substrate is prepared by the following steps:

[0088] Prepare a dispersion of two-dimensional nanosheet substrate;

[0089] Prepare an emulsion of a non-silicon-based mesoporous material precursor prepolymer;

[0090] An emulsion of the two-dimensional nanosheet substrate dispersion and the non-silicon-based mesoporous material precursor prepolymer is mixed, a pH adjuster is added, and the mixture is sintered to obtain the two-dimensional nanosheet substrate.

[0091] The following describes, with reference to specific embodiments, the packaging paper for aerosol generation products prepared by the preparation method of the present invention.

[0092] Example 1: Packaging paper for aerosol-generating products made from assembled mesoporous carbon graphene oxide two-dimensional thermally conductive nanosheets.

[0093] First, dissolve 1.0 g of Pluronic F127 and 0.5 g of dopamine hydrochloride in 100 mL of an ethanol-water solution (ethanol to water volume ratio 1:1). After complete dissolution, add 2 mL of TMB (3,3',5,5'-tetramethylbenzidine) and stir until homogeneous. Add 5 mL of graphene oxide dispersion and 5 mL of concentrated ammonia, let stand for 24 hours, and then centrifuge to dry. Carbonize at 800 °C in a N2 atmosphere to obtain assembled mesoporous carbon graphene oxide two-dimensional thermally conductive nanosheets.

[0094] 1.0 g of assembled mesoporous carbon graphene oxide two-dimensional thermally conductive nanosheets were dispersed in 5 mL of ethanol and ultrasonically dispersed for 10 min to form a mixed wet material. 0.1 g of sodium carboxymethyl cellulose was then added and thoroughly stirred to obtain a paste-like wet material. This paste-like wet material was coated onto both sides of a base paper layer and dried at 40 °C for 15 min to obtain packaging paper A1.

[0095] Example 2: Packaging paper for aerosol-generating products made from assembled mesoporous carbon boron nitride two-dimensional thermally conductive nanosheets.

[0096] First, dissolve 1.0 g of polyethylene glycol and 0.5 g of polydopamine in 100 mL of methanol-water solution (methanol to water volume ratio 1:1). After complete dissolution, add 2 mL of cellulose and stir until homogeneous. Add 5 mL of boron nitride dispersion and 5 mL of sodium bicarbonate aqueous solution, let stand for 24 hours, and then centrifuge to dry. Carbonize at 800 °C in a N2 atmosphere to obtain assembled mesoporous carbon boron nitride two-dimensional thermally conductive nanosheets.

[0097] 1.0 g of assembled mesoporous carbon boron nitride two-dimensional thermally conductive nanosheets were dispersed in 5 mL of ethanol and ultrasonically dispersed for 10 min to form a mixed wet material. 0.1 g of kaolin was then added and stirred thoroughly to obtain a paste-like wet material. The paste-like wet material was coated on both sides of a base paper layer and dried at 40 °C for 15 min to obtain packaging paper A2.

[0098] Example 3: Packaging paper for aerosol-generating products made from assembled mesoporous carbon titanium carbide two-dimensional thermally conductive nanosheets.

[0099] First, dissolve 1.0 g of sodium dodecylbenzenesulfonate and 0.5 g of polystyrene in 100 mL of isopropanol aqueous solution (isopropanol to water volume ratio 1:1). After complete dissolution, add 2 mL of polyvinyl alcohol and stir until homogeneous. Add 5 mL of titanium carbide dispersion and 5 mL of sodium monohydrogen phosphate aqueous solution, let stand for 24 hours, and then centrifuge to dry. Carbonize at 800 °C in a N2 atmosphere to obtain assembled mesoporous carbon titanium carbide two-dimensional thermally conductive nanosheets.

[0100] 1.0 g of assembled mesoporous carbon titanium carbide two-dimensional thermally conductive nanosheets were dispersed in 5 mL of ethanol and ultrasonically dispersed for 10 min to form a mixed wet material. 0.1 g of guar gum was added and stirred thoroughly to obtain a paste-like wet material. The paste-like wet material was coated on both sides of a base paper layer and dried at 40 °C for 15 min to obtain packaging paper A3.

[0101] Example 4: Packaging paper for aerosol-generating products made from a small quantity of assembled mesoporous carbon graphene oxide two-dimensional thermally conductive nanosheets.

[0102] First, dissolve 1.0 g of Pluronic F127 and 0.5 g of dopamine hydrochloride in 100 mL of an ethanol-water solution (ethanol to water volume ratio 1:1). After complete dissolution, add 2 mL of TMB (3,3',5,5'-tetramethylbenzidine) and stir until homogeneous. Add 5 mL of graphene oxide dispersion and 5 mL of concentrated ammonia, let stand for 24 hours, and then centrifuge to dry. Carbonize at 800 °C in a N2 atmosphere to obtain assembled mesoporous carbon graphene oxide two-dimensional thermally conductive nanosheets.

[0103] 0.5 g of assembled mesoporous carbon graphene oxide two-dimensional thermally conductive nanosheets were dispersed in 5 mL of ethanol and ultrasonically dispersed for 10 min to form a mixed wet material. 0.1 g of sodium carboxymethyl cellulose was then added and thoroughly stirred to obtain a paste-like wet material. This paste-like wet material was coated onto both sides of a base paper layer and dried at 40 °C for 15 min to obtain A4 packaging paper.

[0104] Example 5: Packaging paper for aerosol-generating products made from assembled copper oxide and graphene oxide two-dimensional thermally conductive nanosheets.

[0105] First, 1.0 g of sodium dodecylbenzenesulfonate (poloxam) and 0.5 g of copper oxide were dispersed in 100 mL of methanol-water solution (ethanol to water volume ratio 1:1). After complete dissolution, 2 mL of TMB (3,3',5,5'-tetramethylbenzidine) was added and stirred until homogeneous. Then, 5 mL of graphene oxide dispersion and 5 mL of sodium monohydrogen phosphate aqueous solution were added, and the mixture was allowed to stand for 24 hours before centrifugation and drying. Carbonization was then carried out at 800 °C under a N2 atmosphere to obtain two-dimensional thermally conductive nanosheets of copper oxide-assembled graphene oxide.

[0106] 1.0g of graphene oxide two-dimensional thermally conductive nanosheets assembled with copper oxide and 0.1g of kaolin were dispersed on a base paper layer. The nanosheets were composited onto the surface of the base paper layer using a cold pressing machine under a pressure of 50 bar and stabilized at 20℃ for 0.5h to obtain packaging paper A5.

[0107] Example 6: Packaging paper for aerosol-generating products made from assembled zinc oxide and titanium carbide two-dimensional thermally conductive nanosheets.

[0108] First, dissolve 1.0 g of polyethylene glycol and 0.5 g of zinc oxide in 100 mL of isopropanol aqueous solution (isopropanol to water volume ratio 1:1). After complete dissolution, add 2 mL of polyvinyl alcohol and stir until homogeneous. Add 5 mL of titanium carbide dispersion and 5 mL of sodium bicarbonate aqueous solution, let stand for 24 hours, and then centrifuge to dry. Carbonize at 800 °C in a N2 atmosphere to obtain two-dimensional thermally conductive nanosheets of titanium carbide assembled with zinc oxide.

[0109] 1.0g of titanium carbide two-dimensional thermally conductive nanosheets with assembled zinc oxide were dispersed on a base paper layer. The nanosheets were composited onto the surface of the base paper layer using a hot press at 300℃ and cooled at 40℃ for 1.0h to obtain packaging paper A6.

[0110] Comparative Example 1: Packaging paper without a composite material layer on the side of the base paper layer

[0111] Add 0.1g of sodium carboxymethyl cellulose to 5mL of ethanol, stir thoroughly, coat the wet material onto both sides of the base paper layer, and dry at 40℃ for 15min to obtain packaging paper B1.

[0112] Reference Figure 4It can be seen that the thermal conductivity of the packaging paper for aerosol generation products prepared by the preparation method of the present invention, namely the finished products of Examples 1, 2, 3, 4, 5 and 6, is 0.098, 0.089, 0.084, 0.075, 0.072 and 0.070, respectively, is significantly improved compared with the thermal conductivity of 0.061 of the finished product of Comparative Example 1. Furthermore, compared to the six embodiments, the packaging paper for aerosol generation products prepared using mesoporous carbonized graphene oxide two-dimensional thermally conductive nanosheets in Embodiment 1 shows a more significant improvement in thermal conductivity. Meanwhile, compared to Embodiment 4, Embodiment 1 utilizes a larger amount of mesoporous carbonized graphene oxide two-dimensional thermally conductive nanosheets, resulting in a more significant improvement in the thermal conductivity of the packaging paper. Embodiment 3 uses assembled mesoporous carbon titanium carbide two-dimensional thermally conductive nanosheets to prepare packaging paper for aerosol generation products; Embodiment 5 uses assembled copper oxide graphene oxide two-dimensional thermally conductive nanosheets to prepare packaging paper for aerosol generation products; and Embodiment 6 uses assembled zinc oxide titanium carbide two-dimensional thermally conductive nanosheets to prepare packaging paper for aerosol generation products. Compared to Embodiments 5 and 6, the packaging paper prepared using assembled mesoporous carbon in Embodiments 1 and 3 has a higher thermal conductivity than the packaging paper prepared using assembled metallization.

[0113] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A packaging paper for aerosol-generating products, characterized in that, It includes a base paper layer and a composite material layer formed on at least one of the upper and lower surfaces of the base paper layer. The composite material layer includes a two-dimensional nanosheet substrate and a non-silicon-based mesoporous material formed on the two-dimensional nanosheet substrate.

2. The packaging paper according to claim 1, characterized in that, The non-silicon-based mesoporous material is mesoporous carbon or transition metal oxide.

3. The packaging paper according to claim 1, characterized in that, The two-dimensional nanosheet substrate is one of graphene, boron nitride, and MXene.

4. The packaging paper according to claim 1, characterized in that, The base paper layer and the composite material layer are kept from separating by physical and / or chemical methods.

5. The packaging paper according to claim 4, characterized in that, The physical method is selected from one or more of lamination, hot pressing, cold pressing and ultrasonic welding.

6. The packaging paper according to claim 4, characterized in that, The chemical method is selected from one or more of the following: surface activation treatment, plasma treatment, chemical plating, and microstructure modification.

7. The packaging paper according to claim 6, characterized in that, The microstructure modification is selected from one or more of nano-coatings and surface microstructuring.

8. The packaging paper according to claim 5, characterized in that, The lamination includes the addition of an adhesive.

9. The packaging paper according to claim 1, characterized in that, The composite material layer also includes an adhesive.

10. The packaging paper according to claim 1, characterized in that, The packaging paper is prepared by the following steps: S1 provides the base paper layer; S2, providing a slurry containing a two-dimensional nanosheet substrate on which a non-silicon-based mesoporous material is formed; S3, the slurry is coated onto at least one of the upper and lower surfaces of the base paper layer and dried to form a composite material layer, thereby obtaining the packaging paper.

11. The packaging paper according to claim 10, characterized in that, In step S2, the slurry further includes a dispersing solvent and / or a binder.

12. The packaging paper according to claim 10, characterized in that, In step S2, the two-dimensional nanosheet substrate is prepared by the following steps: Prepare a dispersion of two-dimensional nanosheet substrate; Prepare an emulsion of a non-silicon-based mesoporous material precursor prepolymer; An emulsion of the two-dimensional nanosheet substrate dispersion and the non-silicon-based mesoporous material precursor prepolymer is mixed, a pH adjuster is added, and the mixture is sintered to obtain the two-dimensional nanosheet substrate.

13. The packaging paper according to claim 12, characterized in that, The two-dimensional nanosheet substrate dispersion includes one or more of graphene dispersion, boron nitride dispersion, and MXene dispersion.

14. The packaging paper according to claim 12, characterized in that, The emulsion of the non-silicon-based mesoporous material precursor prepolymer contains a pore-expanding agent, which is a methylbenzene organic small molecule pore-expanding agent selected from one or more of xylene, mesitylene, cyclohexane, and fatty acids.

15. The packaging paper according to claim 12, characterized in that, The non-silicon-based mesoporous material precursor prepolymer is selected from one or more of the following: hydrochloride, hydrobromide, hydroiodide, phosphate, nitrate, sulfate, hydrogen sulfate, formate, acetate, adipate, benzoate, benzenesulfonate, toluenesulfonate, methanesulfonate, citrate, camphorate, fumarate, gluconate, maleate, oxalate, salicylate, and tartrate.

16. The packaging paper according to claim 15, characterized in that, The amine containing the catechol structure is a catechol amine, and the catechol amine is selected from one or more of dopamine, norepinephrine and epinephrine; The non-silicon-based mesoporous material precursor prepolymer is formed by prepolymerization of a non-silicon-based mesoporous material precursor, wherein the non-silicon-based mesoporous material precursor is polydopamine or a polydopamine analogue.

17. An aerosol-generating product, characterized in that, Includes the packaging paper as described in claims 1-16.

18. The aerosol-generating article according to claim 17, characterized in that, It also includes aerosol generation matrix and mouthpiece; The packaging paper surrounds at least a portion of the aerosol generating matrix, or the packaging paper surrounds at least a portion of both the aerosol generating matrix and the mouthpiece to secure the mouthpiece to the aerosol generating matrix.

19. A method for preparing packaging paper for aerosol-generating products, comprising the following steps: S1 provides the base paper layer; S2, providing a slurry containing a two-dimensional nanosheet substrate on which a non-silicon-based mesoporous material is formed; S3, the slurry is coated onto at least one of the upper and lower surfaces of the base paper layer and dried to form a composite material layer, thereby obtaining the packaging paper.

20. The preparation method according to claim 19, characterized in that, In step S2, the two-dimensional nanosheet substrate is prepared by the following steps: Prepare a dispersion of two-dimensional nanosheet substrate; Prepare an emulsion of a non-silicon-based mesoporous material precursor prepolymer; An emulsion of the two-dimensional nanosheet substrate dispersion and the non-silicon-based mesoporous material precursor prepolymer is mixed, a pH adjuster is added, and the mixture is sintered to obtain the two-dimensional nanosheet substrate.

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