Non-woven fabric with ecological sensing function and production process thereof

Abstract

The invention relates to the field of cleansing non-woven fabric materials, in particular to non-woven fabric with an ecological sensing function and a production process thereof. The non-woven fabric with the ecological induction function comprises a non-woven fabric body and a printing layer with the ecological induction function, wherein the printing layer with the ecological induction function is made of printing post-finishing liquid with the ecological induction function; the post-printing finishing liquid with the ecological sensing function is prepared from the following raw materials in parts by weight: 5-15 parts of a water-based binder, 60-100 parts of deionized water, 0.25-1.0 part of quaternary ammonium salt modified cationic cellulose and 3-8 parts of a pH-sensitive color-changing nano material. When the non-woven fabric serves as a face washing towel to wipe the face, the cleanliness of the face skin can be detected, and the cleanliness of the face skin can be intelligently fed back according to different display colors of the non-woven fabric after wiping.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of facial cleansing non-woven fabric materials, in particular to a non-woven fabric with ecological sensing function and a production process thereof. BACKGROUND

[0002] Wood pulp non-woven fabric has good water absorption, skin-friendliness, softness, air permeability, moisture absorption, and is not easy to shed, and has other excellent properties, and is widely used in kitchen cleaning, sanitary products, electronic manufacturing and other fields. In the field of sanitary products, wood pulp non-woven fabric is an ideal material for facial cleaning, which can be used with facial cleansing products to deeply clean the skin.

[0003] The existing wood pulp non-woven fabric is made by needle punching process. The needle punching process is mature and has low cost. It can produce wood pulp non-woven fabric with different thickness, hand feeling, hardness and low price, which can meet the use requirements of different fields.

[0004] The existing wood pulp non-woven fabric as a facial cleaning material has single function, and the performance requirement is only skin-friendliness, softness and good water absorption, which can meet the normal facial cleaning requirement. There are also antibacterial wood pulp non-woven fabrics on the market, which mainly meet the use requirement of facial skin sensitivity, and are prepared by post-treatment of wood pulp non-woven fabric with antibacterial liquid.

[0005] Facial cleaning degree is a common concern of consumers. Users often choose multiple cleaning methods to ensure the effect of facial cleaning degree. However, the multiple cleaning method will cause damage to the skin on the one hand, and will also increase the use amount of wood pulp non-woven fabric, causing unnecessary waste of resources. Therefore, the present application provides a non-woven fabric with ecological sensing function and a production process thereof. SUMMARY

[0006] In order to solve the problem of single function of the existing wood pulp non-woven fabric, the present application provides a non-woven fabric with ecological sensing function and a production process thereof.

[0007] The non-woven fabric with ecological sensing function provided by the present application is realized by the following scheme: A non-woven fabric with ecological sensing function comprises a non-woven fabric and a printing layer with ecological sensing function, and the printing layer with ecological sensing function is made of a printing after-treatment liquid with ecological sensing function.

[0008] Preferably, the printing after-treatment liquid with ecological sensing function is made of the following raw materials by weight: 5-15 parts of water-based adhesive, 60-100 parts of deionized water, 0.25-1.0 parts of quaternary ammonium salt modified cationic cellulose, and 3-8 parts of pH sensitive color-changing nanomaterial.

[0009] Preferably, the waterborne adhesive is at least one of waterborne polyurethane dispersion, waterborne acrylate emulsion, waterborne epoxy resin emulsion, waterborne styrene-butadiene emulsion, waterborne natural rubber emulsion, and waterborne silicone rubber emulsion.

[0010] Preferably, the quaternary ammonium salt modified cationic cellulose is at least one of polyquaternary ammonium salt-10 cationic cellulose, quaternary ammonium salt modified nanocellulose, cationic hydroxyethyl cellulose, and cationic hydroxymethyl cellulose.

[0011] When the non-woven fabric of this invention is used as a face towel to wipe the face, it can detect the cleanliness of the facial skin. Based on the different colors displayed by the non-woven fabric after wiping, it can intelligently provide feedback on the cleanliness of the facial skin.

[0012] Preferably, the pH-sensitive color-changing nanomaterial is prepared by using porous nanofillers, end-capped isocyanate silane, dopamine, anthocyanins, and organic solvents.

[0013] Preferably, the porous nanofiller is halloysite nanotubes and / or nano-zeolite powder.

[0014] Preferably, the terminated isocyanate silane is made from isocyanate silane, terminating agent, and aprotic polar solvent.

[0015] Preferably, the aprotic polar solvent is at least one of dimethyl sulfoxide, N,N-dimethylformamide, and acetone.

[0016] Preferably, the isocyanate silane is at least one selected from propyltriethoxysilane, propyltrimethoxysilane, and (propyl(3-isocyanate)methyldimethoxysilane.

[0017] Preferably, the capping agent is at least one of 3,5-dimethylpyrazole, methyl ethyl ketoxime, and caprolactam.

[0018] Preferably, the method for preparing the terminated isocyanate silane is as follows: dissolve the isocyanate silane in an aprotic polar solvent, add a terminating agent, and perform a terminating reaction at 75-85°C for 0.5-1 h. The NCO content in the reactants is detected to be 0. Subsequently, the aprotic polar solvent is removed by vacuum distillation, and the terminated isocyanate silane is obtained by cooling to room temperature.

[0019] Preferably, the preparation method of the pH-sensitive color-changing nanomaterial is as follows: Step 1: Acidification treatment of porous nanofillers; simultaneously prepare end-capped isocyanate silane aqueous solution; Step 2: Place the acidified porous nanofiller in an aqueous solution of capped isocyanate silane, ultrasonically disperse for 15-30 minutes, adjust the temperature to 45-60℃, and react for 2-4 hours at a stirring speed of 200-400 rpm. After vacuum drying of the filter material obtained by vacuum filtration, the modified porous nanofiller can be obtained. Step 3: Mix the modified porous nanofiller with an aprotic polar solvent to form a suspension. Adjust the temperature to 60-80℃, add dopamine to the suspension, and ultrasonically disperse for 15-30 minutes. Adjust the temperature to 115-125℃ and react at a stirring speed of 200-400 rpm for 5-30 minutes. Step 4: Slowly add 0.2-1 part of anthocyanin to the suspension. After the anthocyanin is added at a uniform rate over 0.5-1 hour, continue the reaction at 115-125℃ and 200-400 rpm for 5-30 minutes. Then, remove the aprotic polar solvent by vacuum distillation. The resulting solid powder can be refined to obtain pH-sensitive color-changing nanomaterials.

[0020] More preferably, in step three, the modified porous nanofiller is mixed evenly with an aprotic polar solvent to form a suspension with a solid content of 1-8%. Dopamine is added to the suspension with a solid content of 1-8%, and the mixture is ultrasonically dispersed for 15-30 minutes. The temperature is adjusted to 115-125℃, and the mixture is reacted at a stirring speed of 200-400 rpm for 5-30 minutes. The NCO content in the suspension is then measured until the NCO content in the suspension is 0.

[0021] By adopting the above technical solution, anthocyanins with pH-sensitive color-changing properties can be loaded into the internal pores of modified halloysite. When residual oil on the face comes into contact with anthocyanins, the anthocyanins will show different colors due to pH changes. In other words, the cleanliness of facial skin can be known by the color change on the surface of the non-woven fabric.

[0022] The present invention provides a method for preparing a nonwoven fabric with eco-sensing function, which is achieved through the following technical solution: A method for preparing a nonwoven fabric with eco-sensing function includes the following steps: Step 1: Preparation of pH-sensitive color-changing nanomaterials; Step 2: Preparation of the final printing solution with eco-sensing function; Step 3: The eco-sensing function is printed onto the surface of the nonwoven fabric using a printing roller. The resulting nonwoven fabric is then dried to obtain the finished eco-sensing nonwoven fabric.

[0023] Preferably, in step two, the preparation method of the printing post-treatment solution with eco-sensing function is as follows: after adding deionized water to the water-based binder and mixing evenly, quaternary ammonium salt modified cationic cellulose and pH-sensitive color-changing nanomaterials are added and mixed evenly to obtain the printing post-treatment solution with eco-sensing function.

[0024] The preparation method of the present invention is relatively simple. By performing a printing and finishing process on the wood pulp nonwoven fabric, a printing layer with eco-sensing function is formed, which can reduce the overall production cost of the eco-sensing nonwoven fabric.

[0025] In summary, the present invention has the following advantages: 1. When the non-woven fabric of the present invention is used as a face towel to wipe the face, it can detect the cleanliness of the facial skin. According to the different colors displayed by the non-woven fabric after wiping, it can intelligently reflect the cleanliness of the facial skin, thereby reducing damage to the skin and avoiding excessive consumption of wood pulp non-woven fabric.

[0026] 2. In this invention, a hydrolysis-condensation reaction is carried out between end-capped isocyanate silane and porous nanofiller to modify the surface and pore surface of the porous nanofiller with end-capped isocyanate active functional groups. Subsequently, at the desealing temperature (115-125℃), the active -NCO is released and reacts with the amino group in dopamine, thereby modifying the surface and pore surface of the porous nanofiller with dopamine. The phenolic hydroxyl groups in dopamine have similar polarity to the phenolic hydroxyl groups in anthocyanins, which facilitates the loading of anthocyanins onto the surface and pore surface of the porous nanofiller. The resulting pH-sensitive color-changing nanomaterial is loaded onto the surface of nonwoven fabric through small molecule binding particles (such as polyurethane latex particles with a particle size ≤100nm). When residual oil on the face comes into contact with anthocyanins, the anthocyanins in the pH-sensitive color-changing nanomaterial show different colors due to pH changes. That is, the cleanliness of the facial skin can be known through the color change of the nonwoven fabric surface. Detailed Implementation

[0027] To further understand the inventiveness and technical advancements of this invention, the preferred embodiments of this invention will be discussed in detail below with reference to examples and comparative examples.

[0028] Example: A nonwoven fabric with eco-sensing function includes a nonwoven fabric and a printed layer with eco-sensing function. The printed layer with eco-sensing function is made from a printing post-treatment solution with eco-sensing function.

[0029] The printing finishing solution with eco-sensing function is made from the following raw materials in parts by weight: 5-15 parts water-based binder, 60-100 parts deionized water, 0.25-1.0 parts quaternary ammonium salt modified cationic cellulose, and 3-8 parts pH-sensitive color-changing nanomaterials.

[0030] The waterborne binder is at least one selected from waterborne polyurethane dispersion, waterborne acrylate emulsion, waterborne epoxy resin emulsion, waterborne styrene-butadiene emulsion, waterborne natural rubber emulsion, and waterborne silicone rubber emulsion. Preferably, the waterborne binder is a waterborne polyurethane dispersion, and the particle size of the polyurethane latex particles is ≤100 nm.

[0031] The quaternary ammonium salt modified cationic cellulose is at least one of polyquaternary ammonium salt-10 cationic cellulose, quaternary ammonium salt modified nanocellulose, cationic hydroxyethyl cellulose, and cationic hydroxymethyl cellulose.

[0032] The pH-sensitive color-changing nanomaterial is prepared by means of porous nanofillers, end-capped isocyanate silanes, dopamine, anthocyanins, and organic solvents. The porous nanofillers are halloysite nanotubes and / or nano-zeolite powder. Preferably, the porous nanofillers are halloysite nanotubes.

[0033] The terminated isocyanate silane is composed of an isocyanate silane, a terminating agent, and an aprotic polar solvent. The aprotic polar solvent is at least one selected from dimethyl sulfoxide, N,N-dimethylformamide, and acetone. The isocyanate silane is at least one of 3-propyl isocyanatetriethoxysilane, 3-isocyanatepropyltrimethoxysilane, and (3-propyl isocyanate)methyldimethoxysilane.

[0034] The capping agent is at least one of 3,5-dimethylpyrazole, methyl ethyl ketoxime, and caprolactam.

[0035] The preparation method of the terminal isocyanate silane is as follows: dissolve the isocyanate silane in an aprotic polar solvent, add the terminal agent, and perform the terminal reaction at 75-85℃ for 0.5-1h. The NCO content in the reactant is detected to be 0. Then, remove the aprotic polar solvent by vacuum distillation and cool to room temperature to obtain the terminal isocyanate silane.

[0036] A method for preparing a nonwoven fabric with eco-sensing function includes the following steps: Step 1: Preparation of pH-sensitive color-changing nanomaterials; S1.1, Acidification treatment of porous nanofillers; Simultaneously prepare an aqueous solution of capped isocyanate silane: Mix 3-5 parts of capped isocyanate silane with 30 parts of deionized water and 70 parts of colorless ethanol evenly to obtain an aqueous solution of capped isocyanate silane. S1.2, place the acidified porous nanofiller in a capped isocyanate silane aqueous solution, adjust the pH value to 3-4, ultrasonically disperse for 15-30 min, adjust the temperature to 45-60℃, react at a stirring speed of 200-400 rpm for 2-4 h, and obtain the modified porous nanofiller by vacuum drying after vacuum filtration. S1.3, the modified porous nanofiller is mixed evenly with an aprotic polar solvent to form a suspension with a solid content of 1-8%. Dopamine is added to the suspension with a solid content of 1-8%, and the mixture is ultrasonically dispersed for 15-30 min. The temperature is adjusted to 115-125℃, and the mixture is reacted at a stirring speed of 200-400 rpm for 5-30 min. The NCO content in the suspension is measured by sampling until the NCO content in the suspension is 0. S1.4, slowly add 0.2-1 part of anthocyanin to the suspension. After the anthocyanin is added at a uniform rate over 0.5-1h, continue the reaction at 115-125℃ and 200-400rpm for 5-30min. Then, remove the aprotic polar solvent by vacuum distillation. The resulting solid powder can be refined to obtain pH-sensitive color-changing nanomaterials. Step 2, Preparation of printing post-printing solution with eco-sensing function: Add deionized water to the water-based binder to dilute and mix evenly, then add quaternary ammonium salt modified cationic cellulose and pH-sensitive color-changing nanomaterials, mix evenly to obtain printing post-printing solution with eco-sensing function; Step 3: The eco-sensing function is printed onto the surface of the nonwoven fabric using a printing roller. The resulting nonwoven fabric is then dried to obtain the finished eco-sensing nonwoven fabric.

[0037] Example 1: The eco-sensitive nonwoven fabric includes a nonwoven fabric and an eco-sensitive printed layer. The eco-sensitive printed layer is made from an eco-sensitive post-printing solution. The eco-sensitive post-printing solution is made from the following raw materials in parts by weight: 5 parts water-based binder, 90 parts deionized water, 0.5 parts quaternary ammonium salt modified cationic cellulose, and 4.5 parts pH-sensitive color-changing nanomaterials.

[0038] The waterborne binder is an anionic aliphatic waterborne polyurethane dispersion, model KPU-55, with a solid content of 50±1% NV, manufactured by Guangzhou Kosite New Materials Co., Ltd. The quaternary ammonium salt modified cationic cellulose is polyquaternary ammonium salt-10 cationic cellulose, MiconiumPQ10-J400, manufactured by Suzhou Yuantailun Chemical Co., Ltd.

[0039] A method for preparing a nonwoven fabric with eco-sensing function includes the following steps: Step 1: Preparation of pH-sensitive color-changing nanomaterials; S1.1, Acidification treatment of porous nanofillers: 10g halloysite nanotubes (XFI50, Jiangsu Xianfeng Nanomaterials Technology Co., Ltd.) and 150mL of 0.1mol / L dilute sulfuric acid aqueous solution were poured into a 250ml beaker. A magnetic stir bar was added and the mixture was stirred at a low speed of 120rpm for 5min. After mixing evenly, the mixture was heated to 65℃ and maintained at 65℃ for ultrasonic dispersion treatment with an ultrasonic vibrator (power of the ultrasonic vibrator was 25kHz) for 1 hour. Then the ultrasonic vibrator was removed and the mixture was magnetically stirred at 240rpm for 2 hours. The mixture was filtered under reduced pressure, and the resulting filter material was placed in a vacuum drying oven and vacuum dried at 105℃ for 4 hours to obtain acidified modified halloysite nanotubes. Simultaneously, an aqueous solution of capped isocyanate silane was prepared: 25.0 g of propyltriethoxysilane 3-isocyanate (CAS: 24801-88-5, Hubei Yongkuo Technology Co., Ltd., purity 99%) was dissolved in 175.0 g of N,N-dimethylformamide (CAS: 68-12-2, Shanghai Aladdin Biochemical Technology Co., Ltd.), 9.64 g of 3,5-dimethylpyrazole (CAS: 67-51-6, Xi'an Beckman Chemical Technology Co., Ltd.) and 0.01 g of bismuth 2-ethylhexanoate (CAS: 67874-71-9, Shanghai Maclean Biochemical Technology Co., Ltd.) were added, and after thorough mixing, the mixture was heated to 8... The end-capping reaction was carried out at 0℃ for 1 h. The NCO content in the reactants was detected to be 0. Specifically, the end-capping reaction was carried out until the characteristic absorption peak of -NCO (about 2270 cm⁻¹) could not be detected by FTIR spectroscopy, indicating that the end-capping reaction was complete. Then, N,N-dimethylformamide was removed by vacuum distillation, and the product was cooled to room temperature to obtain 3,5-dimethylpyrazole-terminated propyltriethoxysilane of 3-isocyanate. 3.46 g of 3,5-dimethylpyrazole-terminated propyltriethoxysilane of 3-isocyanate, 30 g of deionized water, and 70 g of colorless ethanol were added to a 250 mL beaker and magnetically stirred at 240 rpm for 3 min. After mixing evenly, an aqueous solution of the end-capped isocyanate silane was obtained. S1.2, Under magnetic stirring at 240 rpm, the acidified halloysite nanotubes of S1.1 were added to a beaker containing an aqueous solution of terminal isocyanate silane. After stirring magnetically at 240 rpm for 3 min, a 0.1 mol / L acetic acid aqueous solution was added to adjust the pH to 3.5. The system was then ultrasonically dispersed for 0.5 hours using an ultrasonic vibrator (power of the ultrasonic vibrator was 25 kHz). After ultrasonic dispersion, the ultrasonic vibrator was removed, and the system temperature was adjusted to 60℃ by constant heating in a water bath. The hydrolysis and condensation reaction was continued for 2 hours while maintaining a stirring speed of 240 rpm. The mixture was then filtered under reduced pressure, and the resulting filter material was placed in a vacuum drying oven and vacuum dried at 105℃ for 4 hours to obtain 3,5-dimethylpyrazole-terminated 3-isocyanate propyltriethoxysilane modified halloysite nanotubes. In step S1.3, the halloysite nanotubes modified with 3,5-dimethylpyrazole-terminated propyltriethoxysilane-3-isocyanate from step S1.2 are mixed uniformly with N,N-dimethylformamide to form an HNTs / DMF suspension with a solid content of 5.0%. Dopamine (CAS: 51-61-6, Shanghai Dexin Zhiyuan Biotechnology Co., Ltd.) is mixed uniformly with N,N-dimethylformamide to form a dopamine DMF solution with a dopamine content of 20.0%. This 20.0% dopamine DMF solution is added dropwise to the HNTs / DMF suspension at a rate of 0.2 g / min. The mass ratio of the 3,5-dimethylpyrazole-terminated propyltriethoxysilane-3-isocyanate-modified halloysite nanotubes to dopamine is 5:1. After the dopamine addition is complete, the solution is subjected to 0.2 g / min ultrasonic vibration. After 5 hours of ultrasonic dispersion treatment, the temperature was adjusted to 120℃, and the reaction was continued for 15 minutes with stirring at 240 rpm. The NCO content in the suspension was measured. If the NCO content in the suspension was not 0, 0.2 g of dopamine DMF solution with a dopamine content of 20.0% was added dropwise to the HNTs / DMF suspension at a rate of 0.2 g / min. After 5 minutes of stirring at 120℃ / 240 rpm, the NCO content in the suspension was measured. This process was repeated until the NCO content in the suspension was 0. Specifically, until the characteristic absorption peak of -NCO (approximately 2270 cm⁻¹) could not be detected by FTIR spectroscopy, indicating that the unsealed -NCO functional group had completely reacted with the -NH2 amino group in dopamine, thus obtaining the DA@3-isocyanatetriethoxysilane modified halloysite nanotube / DMF suspension. S1.4, anthocyanins (CAS: 528-58-5, Shanghai Huicheng Biotechnology Co., Ltd.) were mixed uniformly with N,N-dimethylformamide to form an anthocyanin DMF solution with a 10.0% anthocyanin content. Maintaining the temperature at 120℃, an anthocyanin DMF solution with a 5.0% anthocyanin content was added dropwise to the DA@3-isocyanate-propyltriethoxysilane-modified halloysite nanotube / DMF suspension at a dropping rate of 0.30 g / min. The liquid was uniformly added dropwise to the halloysite nanotube / DMF suspension of DA@3-isocyanatetriethoxysilane modified within 60 minutes. The reaction was continued for 15 minutes at 120℃ and 240 rpm stirring speed. After the reaction was completed, N,N-dimethylformamide was removed by vacuum distillation. The resulting solid powder was washed three times with deionized water and placed in a vacuum drying oven. It was vacuum dried at 105℃ for 4 hours. The dried solid was then placed in a planetary ball mill and ball-milled at 80 rpm for 30 minutes to obtain pH-sensitive color-changing nanomaterials. Step 2, Preparation of the printing post-treatment solution with eco-sensing function: Under nitrogen protection, weigh 5 parts by weight of anionic aliphatic waterborne polyurethane dispersion KPU-55 and place it in a reaction vessel. Add 90 parts of deionized water to the reaction vessel to dilute and mix evenly. Then, add 0.5 parts of quaternary ammonium salt modified cationic cellulose MiconiumPQ10-J400 and 4.5 parts of pH-sensitive color-changing nanomaterials prepared in S1.4 to the reaction vessel at one time. Mix evenly to obtain the printing post-treatment solution with eco-sensing function. Step 3: The eco-sensing printed liquid, prepared in Step 2, is applied to the surface of the wood pulp nonwoven fabric using a printing roller. The resulting wood pulp nonwoven fabric is then fed into an oven for a stepped drying process. The drying parameters are: first stage: 60℃ / 15min; second stage: 80℃ / 30min; third stage: 45℃ / 30min. After drying, the eco-sensing nonwoven fabric product is obtained. The resulting eco-sensing nonwoven fabric product has a dry transverse tensile strength of 23.8N, a dry longitudinal tensile strength of 110%, a formaldehyde content of 0mg / kg, and an antibacterial rate of >99.9% against Staphylococcus aureus.

[0040] In summary, the pH-sensitive color-changing nanomaterials of this invention are loaded onto the surface of nonwoven fabric using small molecule binding particles (such as polyurethane latex particles with a particle size ≤100nm). When residual oil on the face comes into contact with anthocyanins, the anthocyanins in the pH-sensitive color-changing nanomaterials display different colors due to pH changes. That is, the cleanliness of the facial skin can be known by the color change of the nonwoven fabric surface. Based on the different colors displayed by the nonwoven fabric after wiping, the cleanliness of the facial skin can be intelligently fed back, thereby addressing the problem of over-cleaning or insufficient cleaning of the surface, reducing damage to the skin, and avoiding excessive consumption of wood pulp nonwoven fabric.

[0041] It should be noted that this specific embodiment is merely an explanation of the technical solution of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A nonwoven fabric with ecological sensing function, characterized in that: It includes a nonwoven fabric and an eco-sensitive printed layer, wherein the eco-sensitive printed layer is made from an eco-sensitive post-printing solution; the eco-sensitive post-printing solution is made from the following raw materials in parts by weight: 5-15 parts water-based binder, 60-100 parts deionized water, 0.25-1.0 parts quaternary ammonium salt modified cationic cellulose, and 3-8 parts pH-sensitive color-changing nanomaterials.

2. The nonwoven fabric with ecological sensing function according to claim 1, characterized in that: The pH-sensitive color-changing nanomaterial is prepared by porous nanofillers, end-capped isocyanate silane, dopamine, anthocyanins, and organic solvents; the porous nanofillers are halloysite nanotubes and / or nano-zeolite powder.

3. The nonwoven fabric with ecological sensing function according to claim 1, characterized in that: The terminated isocyanate silane is made from isocyanate silane, a terminating agent, and an aprotic polar solvent; the aprotic polar solvent is at least one of dimethyl sulfoxide, N,N-dimethylformamide, and acetone; the isocyanate silane is at least one of 3-propylisocyanatetriethoxysilane, 3-isocyanopropyltrimethoxysilane, and (3-propylisocyanate)methyldimethoxysilane; and the terminating agent is at least one of 3,5-dimethylpyrazole, methyl ethyl ketoxime, and caprolactam.

4. The nonwoven fabric with ecological sensing function according to claim 3, characterized in that: The method for preparing the terminated isocyanate silane is as follows: dissolve the isocyanate silane in an aprotic polar solvent, add a terminating agent, and perform a terminating reaction at 75-85℃ for 0.5-1h. The NCO content in the reactant is detected to be 0. Subsequently, the aprotic polar solvent is removed by vacuum distillation, and the terminated isocyanate silane is obtained by cooling to room temperature.

5. A nonwoven fabric with ecological sensing function according to claim 4, characterized in that: The preparation method of the pH-sensitive color-changing nanomaterial is as follows: Step 1: Acidification treatment of porous nanofillers; simultaneously prepare end-capped isocyanate silane aqueous solution; Step 2: Place the acidified porous nanofiller in an aqueous solution of capped isocyanate silane, ultrasonically disperse for 15-30 minutes, adjust the temperature to 45-60℃, and react for 2-4 hours at a stirring speed of 200-400 rpm. After vacuum drying of the filter material obtained by vacuum filtration, the modified porous nanofiller can be obtained. Step 3: Mix the modified porous nanofiller with an aprotic polar solvent to form a suspension. Adjust the temperature to 60-80℃, add dopamine to the suspension, and ultrasonically disperse for 15-30 minutes. Adjust the temperature to 115-125℃ and react at a stirring speed of 200-400 rpm for 5-30 minutes. Step 4: Slowly add 0.2-1 part of anthocyanin to the suspension. After the anthocyanin is added at a uniform rate over 0.5-1 hour, continue the reaction at 115-125℃ and 200-400 rpm for 5-30 minutes. Then, remove the aprotic polar solvent by vacuum distillation. The resulting solid powder can be refined to obtain pH-sensitive color-changing nanomaterials.

6. The nonwoven fabric with ecological sensing function according to claim 5, characterized in that: In step three, the modified porous nanofiller is mixed evenly with an aprotic polar solvent to form a suspension with a solid content of 1-8%. Dopamine is added to the suspension with a solid content of 1-8%, and the mixture is ultrasonically dispersed for 15-30 minutes. The temperature is adjusted to 115-125℃, and the mixture is reacted at a stirring speed of 200-400 rpm for 5-30 minutes. The NCO content in the suspension is then measured until the NCO content in the suspension is 0.

7. The nonwoven fabric with ecological sensing function according to claim 1, characterized in that: The waterborne adhesive is at least one of the following: waterborne polyurethane dispersion, waterborne acrylate emulsion, waterborne epoxy resin emulsion, waterborne styrene-butadiene emulsion, waterborne natural rubber emulsion, and waterborne silicone rubber emulsion.

8. The nonwoven fabric with ecological sensing function according to claim 1, characterized in that: The quaternary ammonium salt modified cationic cellulose is at least one of polyquaternary ammonium salt-10 cationic cellulose, quaternary ammonium salt modified nanocellulose, cationic hydroxyethyl cellulose, and cationic hydroxymethyl cellulose.

9. A method for preparing a nonwoven fabric with eco-sensing function according to any one of claims 1-8, characterized in that: The process includes the following steps: Step 1, preparation of pH-sensitive color-changing nanomaterials; Step 2, preparation of printing post-solution with eco-sensing function; Step 3, printing the printing post-solution with eco-sensing function onto the surface of nonwoven fabric using a printing roller, and drying the resulting nonwoven fabric to obtain the finished nonwoven fabric with eco-sensing function.

10. The method for preparing a nonwoven fabric with ecological sensing function according to claim 9, characterized in that: The preparation method of the printing post-treatment solution with eco-sensing function in step two is as follows: After diluting and mixing the water-based binder with deionized water, add quaternary ammonium salt modified cationic cellulose and pH-sensitive color-changing nanomaterials, and mix evenly to obtain the printing post-treatment solution with eco-sensing function.