Fiber-based steaming cloth and preparation method and application thereof

Abstract

The application discloses a fiber-based steaming cloth and a preparation method and application thereof, and relates to the technical field of steaming cloth.The fiber-based steaming cloth comprises a hydrophobic layer and a hydrophilic electrostatic spinning fiber membrane layer which are arranged in sequence, and the hydrophobic layer contains titanium dioxide gel; the preparation raw material of the hydrophilic electrostatic spinning fiber membrane layer comprises the following components: a hydrophilic polymer and a water-absorbing resin; wherein the average pore size of the hydrophobic layer is larger than that of the hydrophilic electrostatic spinning fiber membrane layer.The fiber-based steaming cloth of the application adopts environment-friendly materials, is safe, and is suitable for oral contact use environment; in addition, the fiber-based steaming cloth of the application is stable at high temperature and can be used for a long time; the application is provided with titanium dioxide gel in the hydrophobic layer, so that the fiber-based steaming cloth of the application is endowed with antibacterial performance, and the use safety is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steaming cloth, in particular to a fiber-based steaming cloth and a preparation method and application thereof. BACKGROUND

[0002] In the process of using the steaming cloth to steam food such as steamed buns in daily life, water vapor diffuses upward from the bottom of the steaming cloth, and the food is heated and soaked at the same time, thereby affecting the original taste.

[0003] The existing steaming cloths on the market mainly have the following three types: pure silica gel steaming cloth, pure cotton steaming cloth, and bamboo fiber steaming cloth. Among them, the material of the pure silica gel steaming cloth is mainly edible silica gel and composite fiber, which has the following disadvantages: ① During daily use, it needs to be cleaned and soaked in warm water before each use, and can only be used after natural air drying, and the surface needs to be kept dry. Some silica gel steaming cloths also need to be maintained regularly to protect the oil film on the surface of the silica gel steaming cloth. ② If the surface of the silica gel steaming cloth has too much water, the bottom will be wet, and the contact surface with the tray will be sticky after steaming, and residual scale will be generated during repeated use, which needs to be cleaned regularly, otherwise the service life will be shortened. The main material of the pure cotton steaming cloth is cotton, which is prone to mold and bacterial breeding. The main material of the traditional bamboo fiber steaming cloth is regenerated cellulose fiber. Because the cross section of the bamboo fiber is full of large and small elliptical pores, it can absorb a large amount of water in an instant, and the volume will expand accordingly. After air drying, shrinkage will occur.

[0004] Therefore, there is an urgent need to develop a new type of fiber-based steaming cloth to solve the above problems. SUMMARY

[0005] The first technical problem to be solved by the present application is:

[0006] To solve the first technical problem, the technical scheme adopted by the present application is:

[0007] The second technical problem to be solved by the present application is:

[0008] The present application provides a preparation method of the fiber-based steaming cloth.

[0009] To solve the first technical problem, the technical scheme adopted by the present application is:

[0010] A fiber-based steaming cloth, comprising a hydrophobic layer, a hydrophilic electrospun fiber membrane layer and a hydrophilic layer which are sequentially stacked.

[0011] The hydrophobic layer contains titanium dioxide gel;

[0012] The preparation raw material of the hydrophilic electrospun fiber membrane layer comprises the following components: a hydrophilic polymer and a water-absorbing resin;

[0013] The average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0014] According to an embodiment of the present application, one of the technical solutions has at least one of the following advantages or beneficial effects:

[0015] The average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer, forming a pore size gradient effect, and the hydrophobic layer and the hydrophilic electrospun fiber membrane layer form a wetting gradient structure, ensuring one-way transmission of water, and realizing one-way moisture-wicking performance.

[0016] The fiber-based steaming cloth of the present application uses environmentally friendly materials, is safe, and is suitable for oral contact use. In addition, the fiber-based steaming cloth of the present application is stable at high temperatures and can be used for a long time. The present application provides a titanium dioxide gel in the hydrophobic layer, thereby imparting antibacterial properties to the fiber-based steaming cloth of the present application, further improving the safety of use.

[0017] In the fiber-based steaming cloth of the present application, the hydrophilic electrospun fiber membrane layer is a hydrophilic nanofiber membrane layer prepared by electrospinning technology. Compared with traditional fibers, it has a larger surface area, a wide selection range, a high specific area, and strong structure adjustability. Therefore, water can be more easily conducted and diffused, and the rapid and continuous conduction of water makes it have more excellent one-way moisture-wicking performance when combined with the hydrophobic layer.

[0018] According to an embodiment of the present application, the ratio of the average pore size of the hydrophobic layer to the average pore size of the hydrophilic electrospun fiber membrane layer is 18-22:1.0-3.3.

[0019] According to an embodiment of the present application, the hydrophobic layer comprises a polylactic acid non-woven fabric.

[0020] According to an embodiment of the present application, the hydrophilic polymer comprises at least one of polyimide, polyacrylonitrile, polyvinyl alcohol, cellulose acetate, and polylysine.

[0021] According to an embodiment of the present application, the water-absorbing resin comprises at least one of starch grafted acrylate, starch grafted acrylamide, cellulose grafted acrylate, and polyacrylate.

[0022] To solve the second technical problem, the technical solution adopted by the present application is:

[0023] A method for preparing the fiber-based steaming cloth comprises the following steps:

[0024] S1: The hydrophobic non-woven fabric is treated with titanium dioxide sol, and after drying, one side of the hydrophobic non-woven fabric is irradiated with ultraviolet light, and the other side is shielded.

[0025] S2 mixing the hydrophilic polymer and the water-absorbing resin in a solvent to form a mixed solution, and spinning the mixed solution on the hydrophobic layer by electrospinning to obtain the fiber-based steam cloth.

[0026] According to an embodiment of the present application, the preparation method of the titanium dioxide sol comprises the following steps: mixing butyl titanate in a first organic solvent to obtain a first organic solution; mixing citric acid in a second organic solvent to obtain a second organic solution; mixing the first organic solution and the second organic solution, and then aging at room temperature to obtain the titanium dioxide sol. The butyl titanate is an ester compound and is easy to hydrolyze. The mixing of the butyl titanate and the citric acid can effectively inhibit the rapid hydrolysis of the butyl titanate.

[0027] According to an embodiment of the present application, the first organic solvent and the second organic solvent have the same volume.

[0028] According to an embodiment of the present application, the preparation method of the titanium dioxide sol comprises the following steps: mixing butyl titanate in a first organic solvent to obtain a first organic solution; mixing citric acid in a second organic solvent to obtain a second organic solution; mixing the first organic solution and the second organic solution, and then aging at room temperature to obtain the titanium dioxide sol.

[0029] According to an embodiment of the present application, the first organic solvent and the first organic solution are independently selected from at least one of anhydrous ethanol, glycerol, N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, acetone, acetic acid and dichloromethane.

[0030] According to an embodiment of the present application, after the second organic solution is poured into the first organic solution, the reaction is stirred for 6-8 hours.

[0031] According to some embodiments of the present application, when the hydrophilic polymer is polyimide, the first organic solution is one of N,N-dimethylformamide and N,N-dimethylacetamide, or a mixture of two or more thereof.

[0032] According to some embodiments of the present application, when the hydrophilic polymer comprises polyacrylonitrile, the first organic solution comprises at least one of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide and acetone.

[0033] According to some embodiments of the present application, when the hydrophilic polymer comprises polyvinyl alcohol, the first organic solution comprises at least one of N,N-dimethylformamide and N,N-dimethylacetamide.

[0034] According to some embodiments of the present application, when the hydrophilic polymer comprises cellulose acetate, the first organic solution comprises at least one of N,N-dimethylacetamide, acetone, acetic acid, dichloromethane.

[0035] According to some embodiments of the present application, when the hydrophilic polymer comprises polylysine, the first organic solution comprises ethanol.

[0036] According to some embodiments of the present application, after the hydrophobic non-woven fabric is treated with the titanium dioxide sol in step S1, a baking step is further included, and the baking temperature is 75-80°C.

[0037] According to an embodiment of the present application, in step S2, the mass concentration ratio of the hydrophilic polymer to the water-absorbing resin is 7-13:1-7. The mass concentration ratio is the concentration ratio of the mixture of the hydrophilic polymer and the water-absorbing resin after being mixed in the solvent.

[0038] According to some embodiments of the present application, the volume ratio of the butyl titanate to the first organic solvent is 1:15-1:20.

[0039] According to some embodiments of the present application, the volume ratio of the citric acid to the second organic solvent is 1:5-1:6.

[0040] According to some embodiments of the present application, after the mixed solution is electrospun onto the hydrophobic layer in step S2, a drying step is further included.

[0041] According to an embodiment of the present application, the parameters of the electrospinning include a voltage of 13-30 kV and a perfusion speed of 0.5-2 mL / h.

[0042] According to an embodiment of the present application, the parameters of the electrospinning further include a receiving distance of 15-22 cm during the spinning.

[0043] According to an embodiment of the present application, the parameters of the electrospinning further include a temperature of 10-30°C during the spinning.

[0044] According to an embodiment of the present application, the parameters of the electrospinning further include a relative humidity of 30-80% during the spinning.

[0045] According to an embodiment of the present application, the aging time is 5-7 days.

[0046] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. DETAILED DESCRIPTION

[0047] In the description of the application, if there is a description to the first, second, etc. is only for the purpose of distinguishing technical features, and can not be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of the indicated technical features.

[0048] In the description of the application, it is understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, etc. is based on the orientation or position relationship shown in the embodiment, only for the convenience of describing the application and simplifying the description, and is not indicative or implied that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the application.

[0049] The words "preferably", "more preferably" and the like in the present application refer to the embodiments of the present application which can provide certain beneficial effects in certain cases. However, other embodiments can also be preferred in the same or other cases. In addition, the description of one or more preferred embodiments does not imply that other embodiments are not available, nor is it intended to exclude other embodiments from the scope of the application.

[0050] When a numerical range is disclosed herein, the above range is considered to be continuous and includes the minimum value and the maximum value of the range, and each value between the minimum value and the maximum value. Further, when the range refers to an integer, each integer between the minimum value and the maximum value of the range is included. In addition, when multiple ranges are provided to describe a feature or characteristic, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all sub-ranges subsumed therein.

[0051] The technical solutions in the embodiments of the present application will be described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0052] The reagents, methods and equipment used in the present application are conventional reagents, methods and equipment in the technical field, unless otherwise specified.

[0053] The starch grafting acrylate used in the embodiments is purchased from Xi'an Ruihi Biological Technology Co., Ltd., and the product model is ST-g-PAAS starch grafting polyacrylic acid sodium.

[0054] The cellulose grafting acrylate used in the embodiments is purchased from Xi'an Ruihi Biological Technology Co., Ltd., and the product model is HPC-PAA hydroxypropyl cellulose grafting polyacrylic acid copolymer nanogel.

[0055] Polyacrylate used in the embodiment, CAS is 9003-04-7.

[0056] Embodiment 1

[0057] A fiber-based steaming cloth, comprising, in sequence:

[0058] A hydrophobic layer, the hydrophobic layer containing titanium dioxide gel;

[0059] A hydrophilic electrospun fiber membrane layer, the raw material for preparing the hydrophilic electrospun fiber membrane layer comprising the following components: a hydrophilic polymer and a water-absorbing resin;

[0060] The average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0061] The average pore size of the hydrophobic layer is 18 μm to 20 μm, and the average pore size of the hydrophilic layer is 2.0 μm to 2.5 μm.

[0062] The hydrophobic layer is a polylactic acid (PLA) non-woven fabric;

[0063] The hydrophilic polymer is a polyimide;

[0064] The water-absorbing resin is a starch grafted acrylate.

[0065] The fiber-based steaming cloth is prepared by the following steps:

[0066] S1: configuring titanium dioxide sol: mixing anhydrous ethanol and butyl titanate into a solution at a volume ratio of 1:20, taking the same volume of anhydrous ethanol, mixing with citric acid at a volume ratio of 5:1 to form a solution, then slowly pouring the latter solution into the former solution, placing it on a magnetic stirrer for strong stirring for 6 hours, and then aging the stirred solution at room temperature for 6 days to obtain titanium dioxide sol;

[0067] S2: pouring the prepared titanium dioxide sol into a uniform rolling mill, cutting a 30 cm×30 cm polylactic acid (PLA) non-woven fabric, then performing dip finishing on the non-woven fabric, immersing the non-woven fabric in the titanium dioxide sol for 15 seconds, and then immediately placing it between the pressure rollers of the uniform rolling mill, repeating the above steps to perform dip finishing twice, and then placing the finished non-woven fabric in an oven, baking at a temperature of 75°C for 20 minutes;

[0068] S3: performing single-side light shielding finishing on the finished non-woven fabric: covering one side of the non-woven fabric with a black plastic film of the same size as the non-woven fabric, and then irradiating the other side with a UV lamp for 5 hours;

[0069] S4: configuring electrospinning solution: dissolve 11wt% of polyimide and 1wt% of starch grafted acrylate in N,N-dimethylacetamide, uniformly stir for 15h-20h until stirring is uniform, as a hydrophilic fiber membrane solution for standby;

[0070] S5: electrospinning: the finished polylactic acid non-woven fabric is used as the receiving substrate for electrospinning, the electrospinning solution prepared in step four is used to prepare a hydrophilic fiber membrane by electrospinning technology, the spinning voltage is 16kV, the receiving distance is 15cm, the infusion speed is 2mL / h, the temperature is 25℃, and the relative humidity is 30%-40%;

[0071] S6: take down the prepared fiber base and place it in a drying oven for drying for 2h to remove the residual solvent, and a fiber base fabric is obtained.

[0072] Example 2

[0073] A fiber base fabric, comprising, in sequence:

[0074] a hydrophobic layer, the hydrophobic layer containing titanium dioxide gel;

[0075] a hydrophilic electrospun fiber membrane layer, the raw material for preparing the hydrophilic electrospun fiber membrane layer comprising the following components: a hydrophilic polymer and a water-absorbing resin;

[0076] wherein the average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0077] wherein the average pore size of the hydrophobic layer is 19μm-21μm, and the average pore size of the hydrophilic layer is 2.6μm-3.0μm.

[0078] the hydrophobic layer is a polylactic acid (PLA) non-woven fabric;

[0079] the hydrophilic polymer is polyacrylonitrile;

[0080] the water-absorbing resin is starch grafted acrylamide.

[0081] The fiber base fabric is prepared by the following steps:

[0082] S1: configuring titanium dioxide sol: mix anhydrous ethanol and butyl titanate into a solution at a volume ratio of 1:20, take the same volume of anhydrous ethanol, mix with citric acid at a volume ratio of 6:1 to form a solution, then slowly pour the latter solution into the former solution, place it on a magnetic stirrer for strong stirring for 6h, and then age the stirred solution at room temperature for 6d to obtain titanium dioxide sol;

[0083] S2: Pour the prepared titanium dioxide sol into the uniform padder, cut 30cm x 30cm polylactic acid (PLA) non-woven fabric, then dip the non-woven fabric in the padder, soak the non-woven fabric in the titanium dioxide sol for 15 seconds, and then immediately put it between the pressure rollers of the padder, repeat the above steps, and dip the non-woven fabric twice, then put the finished non-woven fabric into the oven, and bake at 75℃ for 20 minutes;

[0084] S3: Make a single-side light-shielding finish of the finished non-woven fabric: cover one side of the non-woven fabric with a black plastic film of the same size as the non-woven fabric, then irradiate the other side with a UV lamp for 5 hours;

[0085] S4: Prepare the electrospinning solution: dissolve 9wt% polyacrylonitrile and 2wt% starch-grafted acrylamide in N,N-dimethylformamide, and stir uniformly for 15-20 hours until the stirring is uniform, to prepare a hydrophilic fiber membrane solution for use;

[0086] S5: Perform electrospinning: use the finished polylactic acid non-woven fabric as the receiving substrate for electrospinning, and prepare a hydrophilic fiber membrane by electrospinning technology using the electrospinning solution prepared in step four, with a spinning voltage of 30kV, a receiving distance of 22cm, a perfusion speed of 2mL / h, a temperature of 25℃, and a relative humidity of 70%-80%;

[0087] S6: Take out the prepared fiber base and place it in a drying oven for 2 hours to remove the residual solvent, and obtain the fiber base fabric.

[0088] Example 3

[0089] A fiber base fabric, comprising, in sequence:

[0090] a hydrophobic layer containing titanium dioxide gel in the hydrophobic layer;

[0091] a hydrophilic electrospun fiber membrane layer, the raw material for preparing the hydrophilic electrospun fiber membrane layer comprising the following components: a hydrophilic polymer and a water-absorbing resin;

[0092] wherein the average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0093] wherein the average pore size of the hydrophobic layer is 18-22μm, and the average pore size of the hydrophilic layer is 1.2-1.4μm.

[0094] the hydrophobic layer is polylactic acid (PLA) non-woven fabric;

[0095] the hydrophilic polymer is polyvinyl alcohol;

[0096] The water-absorbing resin is cellulose grafting acrylate.

[0097] The fiber-based steamed cloth is prepared by the following steps.

[0098] S1: configuring titanium dioxide sol: mixing anhydrous ethanol and butyl titanate into a solution with a volume ratio of 1:15, mixing the same volume of anhydrous ethanol with citric acid into a solution with a volume ratio of 5:1, then slowly pouring the latter solution into the former solution, placing it on a magnetic stirrer for strong stirring for 6 hours, and then aging the stirred solution at room temperature for 6 days to obtain titanium dioxide sol;

[0099] S2: pouring the prepared titanium dioxide sol into a uniform mangle, cutting a 30cm×30cm polylactic acid (PLA) non-woven fabric, and then performing dip finishing on the non-woven fabric, immersing the non-woven fabric in the titanium dioxide sol for 15 seconds, and then immediately placing it between the pressure rollers of the uniform mangle, repeating the above steps to perform dip finishing twice, and then placing the finished non-woven fabric in an oven for baking at a temperature of 75°C for 20 minutes;

[0100] S3: performing single-side light-shielding finishing on the finished non-woven fabric: covering one side of the non-woven fabric with a black plastic film of the same size, and then irradiating the other side with a UV lamp for 5 hours;

[0101] S4: configuring electrospinning solution: dissolving 10wt% polyvinyl alcohol and 2wt% cellulose grafting acrylate in N,N-dimethylformamide, uniformly stirring for 15-20 hours until the solution is uniform, and then preparing the solution as a hydrophilic fiber membrane solution for standby;

[0102] S5: electrospinning: using the finished polylactic acid non-woven fabric as a receiving substrate for electrospinning, and preparing a hydrophilic fiber membrane by electrospinning technology using the electrospinning solution prepared in step four, with a spinning voltage of 13kV, a receiving distance of 15cm, a perfusion speed of 1mL / h, a temperature of 25°C, and a relative humidity of 60%-65%;

[0103] S6: taking out the prepared fiber-based steamed cloth and placing it in a drying box for drying for 2 hours to remove residual solvents, thereby obtaining a fiber-based steamed cloth.

[0104] Example 4

[0105] A fiber-based steamed cloth includes, in sequence:

[0106] a hydrophobic layer containing titanium dioxide gel in the hydrophobic layer;

[0107] The hydrophilic electrospun fiber membrane layer is prepared from a raw material including a hydrophilic polymer and a water-absorbing resin.

[0108] The average pore size of the hydrophobic layer is greater than that of the hydrophilic electrospun fiber membrane layer.

[0109] The average pore size of the hydrophobic layer is 18-20 μm, and the average pore size of the hydrophilic layer is 1.0-1.9 μm.

[0110] The hydrophobic layer is a polylactic acid (PLA) non-woven fabric.

[0111] The hydrophilic polymer is cellulose acetate.

[0112] The water-absorbing resin is a polyacrylate.

[0113] The fiber-based fabric is prepared by the following steps:

[0114] S1: Prepare a titanium dioxide sol: mix anhydrous ethanol and butyl titanate in a volume ratio of 1:18 to form a solution, take the same volume of anhydrous ethanol, and mix it with citric acid in a volume ratio of 5:1 to form a solution, then slowly pour the latter solution into the former solution, place it on a magnetic stirrer for strong stirring for 6 h, and then let it stand at room temperature for 6 d to obtain a titanium dioxide sol;

[0115] S2: Pour the prepared titanium dioxide sol into a uniform rolling machine, cut a 30 cm×30 cm polylactic acid (PLA) non-woven fabric, and then dip and finish the non-woven fabric, immerse the non-woven fabric in the titanium dioxide sol for 15 seconds, and then immediately place it between the pressure rollers of the uniform rolling machine, repeat the above steps to dip and finish the non-woven fabric twice, and then place the finished non-woven fabric in an oven, bake at a temperature of 75°C for 20 minutes;

[0116] S3: Perform single-side light-shielding finishing on the finished non-woven fabric: cover one side of the non-woven fabric with a black plastic film of the same size as the non-woven fabric, and then irradiate the other side with a UV lamp for 5 h;

[0117] S4: Prepare an electrospinning solution: dissolve 13wt% cellulose acetate and 7wt% polyacrylate in N,N-dimethylacetamide, uniformly stir for 15-20 h until the solution is uniformly stirred, and then use it as a hydrophilic fiber membrane solution for standby;

[0118] S5: electrospinning: the prepared polylactic acid non-woven fabric is used as a receiving substrate for electrospinning, and the electrospinning solution prepared in step four is used to prepare a hydrophilic fiber membrane by electrospinning technology, the spinning voltage is 19 kV, the receiving distance is 15 cm, the perfusion speed is 2 mL / h, the temperature is 25 °C, and the relative humidity is 65% to 70%;

[0119] S6: the prepared fiber base is taken out and placed in a drying oven for drying for 2 h to remove the residual solvent, thereby obtaining a fiber base fabric.

[0120] Example 5

[0121] A fiber base fabric includes, in sequence:

[0122] a hydrophobic layer containing titanium dioxide gel in the hydrophobic layer;

[0123] a hydrophilic electrospun fiber membrane layer, the raw material for preparing the hydrophilic electrospun fiber membrane layer including the following components: a hydrophilic polymer and a water-absorbing resin;

[0124] wherein the average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0125] wherein the average pore size of the hydrophobic layer is 19 μm to 22 μm, and the average pore size of the hydrophilic layer is 3.1 μm to 3.3 μm.

[0126] the hydrophobic layer is a polylactic acid (PLA) non-woven fabric;

[0127] the hydrophilic polymer is polylysine;

[0128] the water-absorbing resin is polyacrylate.

[0129] The fiber base fabric is prepared by the following steps:

[0130] S1: prepare titanium dioxide sol: mix anhydrous ethanol and butyl titanate in a volume ratio of 1:18 to form a solution, take the same volume of anhydrous ethanol, mix it with citric acid in a volume ratio of 6:1 to form a solution, then slowly pour the latter solution into the former solution, place it on a magnetic stirrer for strong stirring for 6 h, and then age the stirred solution at room temperature for 6 d, thereby obtaining titanium dioxide sol;

[0131] S2: pour the prepared titanium dioxide sol into a uniform rolling mill, cut a 30 cm x 30 cm polylactic acid (PLA) non-woven fabric, then perform dip-nip finishing on the non-woven fabric, immerse the non-woven fabric in the titanium dioxide sol for 15 seconds, then immediately place it between the pressure rollers of the uniform rolling mill, repeat the above steps to perform dip-nip finishing twice on the non-woven fabric, and then place the finished non-woven fabric in an oven, bake at a temperature of 75 °C for 20 minutes;

[0132] S3: The finished non-woven fabric is subjected to single-side light shielding finishing: a black plastic film of the same size as the non-woven fabric is used to cover one side of the non-woven fabric, and then a UV lamp is used to irradiate the other side which has not been subjected to light shielding treatment, with the irradiation time being 5 h;

[0133] S4: The electrospinning solution is prepared: 7wt% polylysine and 7wt% polyacrylate are dissolved in ethanol, and the mixture is uniformly stirred for 15-20 h until it is uniformly stirred, to serve as a hydrophilic fiber membrane solution for standby;

[0134] S5: The electrospinning is performed: the finished polylactic acid non-woven fabric is used as the receiving substrate for electrospinning, and the electrospinning solution prepared in step four is used to prepare a hydrophilic fiber membrane through electrospinning technology, with the spinning voltage being 17 kV, the receiving distance being 12 cm, the perfusion speed being 0.5 mL / h, the temperature being 20-23°C, and the relative humidity being 55-65%;

[0135] S6: The prepared fiber base is taken down and placed in a drying box for drying for 2 h to remove the residual solvent, to obtain a fiber base fabric.

[0136] Example 6

[0137] A fiber base fabric includes, in sequence:

[0138] a hydrophobic layer containing titanium dioxide gel in the hydrophobic layer;

[0139] a hydrophilic electrospun fiber membrane layer, the raw material for preparing the hydrophilic electrospun fiber membrane layer including the following components: a hydrophilic polymer and a water-absorbing resin;

[0140] The average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0141] The average pore size of the hydrophobic layer is 18-20 μm, and the average pore size of the hydrophilic layer is 2.0-2.5 μm.

[0142] The hydrophobic layer is a polylactic acid (PLA) non-woven fabric;

[0143] The hydrophilic polymer is a polyimide;

[0144] The water-absorbing resin is a cellulose grafted acrylate.

[0145] The fiber base fabric is prepared by the following steps:

[0146] S1: Preparation of titanium dioxide sol: anhydrous ethanol and butyl titanate were mixed into a solution at a volume ratio of 1:16, and the same volume of anhydrous ethanol was mixed with citric acid at a volume ratio of 5:1 to form a solution, then the latter solution was slowly poured into the former solution, placed on a magnetic stirrer for strong stirring for 6h, and the stirred solution was aged at room temperature for 6d to obtain a titanium dioxide sol;

[0147] S2: Pour the prepared titanium dioxide sol into the uniform padder, cut 30cm x 30cm polylactic acid (PLA) non-woven fabric, then dip and finish the non-woven fabric, immerse the non-woven fabric in the titanium dioxide sol for 15 seconds, then immediately place it between the pressure rollers of the uniform padder, repeat the above steps to dip and finish the non-woven fabric twice, and then place the finished non-woven fabric in an oven with a baking temperature of 75℃ for 20 minutes;

[0148] S3: Single-side light shielding finishing of the finished non-woven fabric: cover one side of the non-woven fabric with a black plastic film of the same size, then irradiate the other side with a UV lamp for 5h;

[0149] S4: Preparation of electrospinning solution: dissolve 11wt% polyimide and 2wt% cellulose grafting acrylate in N,N-dimethylacetamide, uniformly stir for 15-20h until uniform, and use as a hydrophilic fiber membrane solution;

[0150] S5: Electrospinning: use the finished polylactic acid non-woven fabric as the receiving substrate for electrospinning, and prepare a hydrophilic fiber membrane by electrospinning technology using the electrospinning solution prepared in step four, with a spinning voltage of 20kV, a receiving distance of 20cm, a perfusion speed of 2mL / h, a temperature of 25℃, and a relative humidity of 30%-40%;

[0151] S6: Take out the prepared fiber base and place it in a drying oven for 2h to remove residual solvents, and obtain a fiber base fabric.

[0152] Example 7

[0153] A fiber base fabric, comprising, in sequence:

[0154] a hydrophobic layer containing titanium dioxide gel in the hydrophobic layer;

[0155] a hydrophilic electrospun fiber membrane layer, the preparation raw material of the hydrophilic electrospun fiber membrane layer comprising the following components: a hydrophilic polymer and a water-absorbing resin;

[0156] wherein the average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0157] wherein the average pore size of the hydrophobic layer is 20-22 pm and the average pore size of the hydrophilic layer is 2.0-2.5 pm.

[0158] The hydrophobic layer is a polylactic acid (PLA) non-woven fabric.

[0159] The hydrophilic polymer is a polyimide.

[0160] The water-absorbing resin is a polyacrylate.

[0161] The fiber-based fabric is prepared by the following steps:

[0162] S1: configuring a titanium dioxide sol: mixing anhydrous ethanol and butyl titanate into a solution at a volume ratio of 1:16, taking the same volume of anhydrous ethanol, mixing with citric acid at a volume ratio of 6:1 to form a solution, then slowly pouring the latter solution into the former solution, placing it on a magnetic stirrer for strong stirring for 6 h, and then aging the stirred solution at room temperature for 6 d to obtain a titanium dioxide sol;

[0163] S2: pouring the prepared titanium dioxide sol into an even roller, cutting a 30 cm x 30 cm polylactic acid (PLA) non-woven fabric, then performing dip-padding finishing on the non-woven fabric, immersing the non-woven fabric in the titanium dioxide sol for 15 s, and then immediately placing it between the pressure rollers of the even roller, repeating the above steps to perform dip-padding finishing twice, and then placing the finished non-woven fabric in an oven for baking at a temperature of 75 °C for 20 min;

[0164] S3: performing single-side light-shielding finishing on the finished non-woven fabric: covering one side of the non-woven fabric with a black plastic film of the same size as the non-woven fabric, and then irradiating the other side with a UV lamp for 5 h;

[0165] S4: configuring an electrospinning solution: dissolving 11 wt% polyimide and 7 wt% polyacrylate in N,N-dimethylacetamide, uniformly stirring for 15-20 h until the solution is uniformly stirred, and then using the solution as a hydrophilic fiber membrane solution for standby;

[0166] S5: performing electrospinning: using the finished polylactic acid non-woven fabric as a receiving substrate for electrospinning, and using the electrospinning solution prepared in step four to prepare a hydrophilic fiber membrane by electrospinning technology, with a spinning voltage of 15 kV, a receiving distance of 20 cm, a perfusion speed of 2 mL / h, a temperature of 25 °C, and a relative humidity of 30-40%;

[0167] S6: taking out the prepared fiber-based fabric and placing it in a drying box for drying for 2 h to remove residual solvents, thereby obtaining a fiber-based fabric.

[0168] Example 8

[0169] A fiber-based steaming cloth, comprising, in order:

[0170] a hydrophobic layer, the hydrophobic layer containing a titanium dioxide gel;

[0171] a hydrophilic electrospun fiber membrane layer, the raw material for preparing the hydrophilic electrospun fiber membrane layer comprising the following components: a hydrophilic polymer and a water-absorbing resin;

[0172] wherein the average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0173] wherein the average pore size of the hydrophobic layer is 18 μm to 22 μm, and the average pore size of the hydrophilic layer is 2.0 μm to 2.5 μm.

[0174] the hydrophobic layer is a polylactic acid (PLA) non-woven fabric;

[0175] the hydrophilic polymer is a polyimide;

[0176] the water-absorbing resin is a starch grafted acrylate.

[0177] The fiber-based steaming cloth is prepared by the following steps:

[0178] S1: configuring a titanium dioxide sol: mixing anhydrous ethanol and butyl titanate into a solution at a volume ratio of 1:20, taking the same volume of anhydrous ethanol, mixing it with citric acid at a volume ratio of 5:1 to form a solution, then slowly pouring the latter solution into the former solution, placing it on a magnetic stirrer for strong stirring for 6 hours, and then aging the stirred solution at room temperature for 7 days to obtain a titanium dioxide sol;

[0179] S2: pouring the prepared titanium dioxide sol into an even roller, cutting a 30 cm×30 cm polylactic acid (PLA) non-woven fabric, then performing dip finishing on the non-woven fabric, immersing the non-woven fabric in the titanium dioxide sol for 15 seconds, and then immediately placing it between the pressure rollers of the even roller, repeating the above steps to perform dip finishing twice on the non-woven fabric, and then placing the finished non-woven fabric in an oven for baking at a temperature of 75°C for 20 minutes;

[0180] S3: performing single-side light shielding finishing on the finished non-woven fabric: covering one side of the non-woven fabric with a black plastic film of the same size as the non-woven fabric, and then irradiating the other side with a UV lamp for 5 hours;

[0181] S4: configuring an electrospinning solution: dissolving 11wt% polyimide and 1wt% starch grafted acrylate in N,N-dimethylacetamide, uniformly stirring for 15-20 hours until the solution is uniformly stirred, and then using the solution as a hydrophilic fiber membrane solution for standby use.

[0182] S5: electrospinning: using the finished polylactic acid non-woven fabric as the receiving substrate for electrospinning, and using the electrospinning solution prepared in step four to prepare a hydrophilic fiber membrane by electrospinning technology, with a spinning voltage of 16 kV, a receiving distance of 15 cm, a perfusion speed of 2 mL / h, a temperature of 25 °C, and a relative humidity of 30% to 40%;

[0183] S6: taking down the prepared fiber base and placing it in a drying oven for drying for 2 h to remove residual solvents, thereby obtaining a fiber base fabric.

[0184] Example 9

[0185] A fiber base fabric includes, in sequence:

[0186] a hydrophobic layer containing titanium dioxide gel in the hydrophobic layer;

[0187] a hydrophilic electrospun fiber membrane layer, the raw material for preparing the hydrophilic electrospun fiber membrane layer including the following components: a hydrophilic polymer and a water-absorbing resin;

[0188] wherein the average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0189] wherein the average pore size of the hydrophobic layer is 19 μm to 22 μm, and the average pore size of the hydrophilic layer is 2.0 μm to 2.5 μm.

[0190] The hydrophobic layer is a polylactic acid (PLA) non-woven fabric;

[0191] The hydrophilic polymer is a polyimide;

[0192] The water-absorbing resin is a starch grafted acrylate.

[0193] The fiber base fabric is prepared by the following steps:

[0194] S1: configuring a titanium dioxide sol: mixing anhydrous ethanol and butyl titanate into a solution at a volume ratio of 1:20, taking the same volume of anhydrous ethanol, mixing it with citric acid at a volume ratio of 5:1 to form a solution, then slowly pouring the latter solution into the former solution, placing it on a magnetic stirrer for strong stirring for 6 h, and then aging the stirred solution at room temperature for 6 d to obtain a titanium dioxide sol;

[0195] S2: Pour the prepared titanium dioxide sol into the uniform padder, cut 30cm x 30cm polylactic acid (PLA) non-woven fabric, then dip the non-woven fabric in the padder, soak the non-woven fabric in the titanium dioxide sol for 15 seconds, and then immediately put it between the pressure rollers of the uniform padder, repeat the above steps, and dip and pad the non-woven fabric twice, then put the finished non-woven fabric into an oven, and bake at 80℃ for 20 minutes;

[0196] S3: Perform single-side light shielding finishing on the finished non-woven fabric: cover one side of the non-woven fabric with a black plastic film of the same size as the non-woven fabric, then use a UV lamp to irradiate the other side that has not been subjected to light shielding treatment, and the irradiation time is 5h;

[0197] S4: Prepare the electrospinning solution: dissolve 11wt% polyimide and 1wt% starch grafted acrylate in N,N-dimethylacetamide, and uniformly stir for 15-20h until the stirring is uniform, to prepare a hydrophilic fiber membrane solution for standby;

[0198] S5: Perform electrospinning: use the finished polylactic acid non-woven fabric as the receiving substrate for electrospinning, and prepare a hydrophilic fiber membrane by electrospinning technology using the electrospinning solution prepared in step four, with a spinning voltage of 16kV, a receiving distance of 15cm, a perfusion speed of 2mL / h, a temperature of 25℃, and a relative humidity of 30%-40%;

[0199] S6: Take out the prepared fiber base and place it in a drying oven for drying for 2h to remove residual solvents, thereby obtaining a fiber base fabric.

[0200] Example 10

[0201] A fiber base fabric includes, in sequence:

[0202] a hydrophobic layer containing titanium dioxide gel in the hydrophobic layer;

[0203] a hydrophilic electrospun fiber membrane layer, the raw material for preparing the hydrophilic electrospun fiber membrane layer including the following components: a hydrophilic polymer and a water-absorbing resin;

[0204] wherein the average pore size of the hydrophobic layer is greater than the average pore size of the hydrophilic electrospun fiber membrane layer.

[0205] wherein the average pore size of the hydrophobic layer is 18-21μm, and the average pore size of the hydrophilic layer is 2.0-2.5μm.

[0206] the hydrophobic layer is polylactic acid (PLA) non-woven fabric;

[0207] the hydrophilic polymer is polyimide;

[0208] The water-absorbing resin is starch grafted acrylate.

[0209] The above-mentioned fiber-based steamed cloth is prepared by the following steps:

[0210] S1: configuring titanium dioxide sol: mixing anhydrous ethanol and butyl titanate into a solution with a volume ratio of 1:20, taking the same volume of anhydrous ethanol, mixing with citric acid into a solution with a volume ratio of 5:1, then slowly pouring the latter solution into the former solution, placing it on a magnetic stirrer for strong stirring for 6h, and then aging the stirred solution at room temperature for 6d to obtain titanium dioxide sol;

[0211] S2: pouring the prepared titanium dioxide sol into a uniform padder, cutting a 30cm×30cm polylactic acid (PLA) non-woven fabric, then performing dip-padding finishing on the non-woven fabric, immersing the non-woven fabric in the titanium dioxide sol for 15 seconds, and then immediately placing it between the pressure rollers of the uniform padder, repeating the above steps to achieve dip-padding finishing twice, and then placing the finished non-woven fabric in an oven for baking at a temperature of 75℃ for 20 minutes;

[0212] S3: performing single-side light-shielding finishing on the finished non-woven fabric: covering one side of the non-woven fabric with a black plastic film of the same size, and then irradiating the other side with a UV lamp for 5h;

[0213] S4: configuring electrospinning solution: dissolving 11wt% polyimide and 1wt% starch grafted acrylate in N,N-dimethylacetamide, uniformly stirring for 15h-20h until uniform, and then preparing a hydrophilic fiber membrane solution for use;

[0214] S5: performing electrospinning: using the finished polylactic acid non-woven fabric as the receiving substrate for electrospinning, and preparing a hydrophilic fiber membrane by electrospinning technology using the electrospinning solution prepared in step four, with a spinning voltage of 16kV, a receiving distance of 15cm, a perfusion speed of 2mL / h, a temperature of 20℃, and a relative humidity of 30%-40%;

[0215] S6: taking out the prepared fiber-based steamed cloth and placing it in a drying oven for drying for 2h to remove residual solvents, thereby obtaining the fiber-based steamed cloth.

[0216] Performance test:

[0217] The fiber-based steamed cloth prepared in Examples 1-7 was subjected to performance testing, and the test results are shown in Table 1.

[0218] The test method is as follows:

[0219] 1. Water management performance: The liquid moisture management tester (MMT) is used as the detection instrument in the automatic mode, with consistent water amount, sampling position and calculation mode, relatively consistent test method between different samples, minimized human interference, more reliable experimental results, more comprehensive data, and accurate characterization of one-way wetting ability.

[0220] The test data are compared with the indicators of American standard AATCC TM 195-2009 “Liquid moisture management properties of fabrics” and Chinese standard GB / T 21655.1-2008 “Evaluation of moisture management properties of textiles Part 1: Single component test method” to determine the grading range of the one-way wetting index of woven fabric as the evaluation standard.

[0221] The sample is placed in the liquid moisture management tester (MMT), and the instrument automatically drops a certain amount of water onto the test object. The water content on both sides of the test object can be measured by a sensor. The instrument calculates and compares the mutual transfer of water content on both sides according to the change of water content with time, and calculates the wetting time, water absorption rate, maximum wetting radius, diffusion speed and one-way transmission index of the sample.

[0222] 2. Escherichia coli inhibition rate: The test is referenced to GB / T 31713-2015 “Safety and hygiene requirements for antibacterial textiles”.

[0223] Table 1

[0224] moisture management performance escherichia coli inhibition rate example 1 1200％ 96％ example 2 1000％ 95％ example 3 1200％ 98％ example 4 1300％ 97％ example 5 1000％ 95％ example 6 1400％ 95.7％ example 7 1500％ 98.6％

[0225] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent transformation or direct or indirect application in the related technical field using the content of the present application is also included in the patent protection scope of the present application.

Claims

1. A fiber-based steaming cloth, characterized by: The fiber-based steam cloth comprises, in sequence from top to bottom: a hydrophobic layer containing a titanium dioxide gel; a hydrophilic electrospun fiber membrane layer, a raw material for preparing the hydrophilic electrospun fiber membrane layer comprising the following components: a hydrophilic polymer and a water-absorbing resin; wherein the average pore size of the hydrophobic layer is 18 μm to 20 μm, and the average pore size of the hydrophilic electrospun fiber membrane layer is 1.0 μm to 1.9 μm; or, the average pore size of the hydrophobic layer is 18 μm to 20 μm, and the average pore size of the hydrophilic electrospun fiber membrane layer is 2.0 μm to 2.5 μm; or, the average pore size of the hydrophobic layer is 20 μm to 22 μm, and the average pore size of the hydrophilic electrospun fiber membrane layer is 2.0 μm to 2.5 μm; The fiber-based steam cloth is prepared by a method comprising the following steps: S1 finishing the hydrophobic non-woven fabric with a titanium dioxide sol, and drying the hydrophobic non-woven fabric, then irradiating one side of the hydrophobic non-woven fabric with ultraviolet light and shielding the other side; S2 mixing a hydrophilic polymer and a water-absorbing resin in a solvent to prepare a mixed solution, and electrospinning the mixed solution on the hydrophobic layer to obtain the fiber-based steam cloth; The water-absorbing resin comprises at least one of starch grafted acrylate, starch grafted acrylamide, cellulose grafted acrylate and polyacrylate.

2. A fiber-based steaming cloth according to claim 1, characterized in that: The ratio of the average pore size of the hydrophobic layer to the average pore size of the hydrophilic electrospun fiber membrane layer is 18 to 22: 1.0 to 3.

3.

3. A fibrous base fabric according to claim 1, wherein: The hydrophobic layer comprises a polylactic acid non-woven fabric.

4. The fiber-based steaming cloth of claim 1, wherein: The hydrophilic polymer comprises at least one of polyimide, polyacrylonitrile, polyvinyl alcohol, cellulose acetate and polylysine.

5. A fiber-based steaming cloth according to claim 1, characterized in that: The preparation method of the titanium dioxide sol comprises the following steps: mixing butyl titanate in a first organic solvent to obtain a first organic solution; mixing citric acid in a second organic solvent to obtain a second organic solution, pouring the second organic solution into the first organic solution, and aging at room temperature after reaction to obtain the titanium dioxide sol.

6. A fiber-based steaming cloth according to claim 1, characterized in that: In step S2, the mass concentration ratio of the hydrophilic polymer to the water-absorbing resin is 7 to 13: 1 to 7.

7. A fiber-based steaming cloth according to claim 1, characterized in that: The parameters of the electrospinning include a voltage of 13 kV to 30 kV and a perfusion speed of 0.5 mL / h to 2 mL / h.

8. A fibrous base fabric according to claim 5, wherein: The aging time is 5 days to 7 days.