Preparation method of graphene liquid-distributed deodorization spunlace nonwoven fabric

Abstract

This invention discloses a method for preparing a graphene-based deodorizing spunlace nonwoven fabric, belonging to the field of spunlace nonwoven fabric technology. The method includes: S1, mixing and dispersing water, a dispersing agent, and a graphene derivative under heating conditions to obtain a graphene dispersion; S2, adding a humectant, vitamins, and an antibacterial agent to the dispersion, heating and stirring to dissolve, cooling, adding plant-based deodorizing essential oils and functional additives, stirring and filtering to obtain a functional liquid; S3, applying the functional liquid to a spunlace nonwoven fabric substrate using an impregnation or spraying process, and drying at low temperature to obtain the final product. In this invention, the graphene derivative is selected from graphene oxide, reduced graphene oxide, or graphene quantum dots, and the functional additive is selected from sodium pyrrolidone carboxylate, undecylenoyl phenylalanine, or sodium hyaluronate. The resulting nonwoven fabric has a dual deodorizing mechanism combining physical adsorption and chemical decomposition, possessing broad-spectrum antibacterial and skin-moisturizing effects, and exhibits strong process compatibility, making it suitable for large-scale production.

Description

Technical Field

[0001] This invention belongs to the field of spunlace nonwoven fabric technology, specifically relating to a method for preparing graphene-based deodorizing spunlace nonwoven fabric. Background Technology

[0002] Spunlace nonwoven fabrics are widely used in disposable face wipes, wet wipes, household cleaning products, and medical dressings due to their excellent properties such as softness, skin-friendliness, good water absorption, and biodegradability. However, traditional spunlace nonwoven products have relatively limited functionality, mainly relying on physical wiping and water absorption, lacking active and long-lasting functional modifications. In practical use, the following problems exist:

[0003] 1. It lacks an active deodorizing function. Especially after contact with sweat, oil, or certain environmental odors, the non-woven fabric itself easily absorbs and produces unpleasant smells, which seriously affects the user experience.

[0004] 2. It has limited functionality, only possessing basic cleaning and water absorption capabilities, and cannot meet consumers' multi-dimensional needs for skin care, antibacterial properties, and deodorization.

[0005] 3. Although there have been attempts in the market to give products deodorizing functions by adding activated charcoal powder or chemical fragrances, these traditional deodorizers often have problems such as limited adsorption capacity, easy saturation, easy loss of functional ingredients, or potential skin irritation, making it difficult to achieve safe, long-lasting, and stable deodorizing effects.

[0006] As consumers' functional demands for daily necessities and cleaning products become increasingly diversified, the market demand for high-end nonwoven fabric products that combine basic cleaning capabilities with skincare, antibacterial, and long-lasting deodorization functions is becoming increasingly urgent. Graphene and its derivatives (such as graphene oxide) possess large specific surface area, high chemical stability, strong adsorption capacity, and intrinsic antibacterial properties, providing new technological approaches for the development of novel multifunctional nonwoven fabric materials. Stable integration of graphene materials with spunlace nonwoven fabric substrates holds promise for achieving a qualitative leap in the deodorization and antibacterial properties of products through a synergistic effect of physical adsorption and chemical processes.

[0007] Therefore, given the current situation where spunlace nonwoven fabrics have poor deodorization performance, limited functionality, and limitations of traditional modification methods, there is an urgent need to develop a novel graphene-modified spunlace nonwoven fabric and its preparation method that can provide long-lasting and stable deodorization, while also having multiple functions such as antibacterial and skin care, and is highly adaptable to various processes. Summary of the Invention

[0008] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a method for preparing graphene-based deodorizing spunlace nonwoven fabric.

[0009] The present invention relates to a method for preparing a graphene-based deodorizing spunlace nonwoven fabric, specifically comprising the following steps:

[0010] S1. Water, dispersing agent and graphene derivative are mixed under heating conditions and dispersed to form a uniform and stable graphene dispersion; the graphene derivative is selected from at least one of graphene oxide, reduced graphene oxide and graphene quantum dots.

[0011] S2. Add humectant, vitamin, and antibacterial agent to the graphene dispersion, stir until dissolved under heating conditions, then cool down, add plant deodorizing essential oil and functional additive, stir to mix evenly, and finally filter to remove impurities to obtain functional liquid; the functional additive is at least one of sodium pyrrolidone carboxylate, undecenoyl phenylalanine, and sodium hyaluronate.

[0012] S3. Using an impregnation or spraying process, the spunlace nonwoven fabric substrate is moistened with a functional liquid and then dried at a low temperature to the target moisture content to obtain a graphene-based deodorizing spunlace nonwoven fabric.

[0013] By weight ratio, the ratio of water:graphene derivative:vitamin:functional additive:humectant:antibacterial agent:dispersant is 60-90:0.1-2:0.1-0.5:0.5-0.8:5-10:0.1-0.5:0.5-2.

[0014] The spunlace nonwoven fabric substrate is at least one of cotton fiber, viscose fiber, polyester fiber, and bamboo fiber.

[0015] In the dispersion process of step S1, ultrasonic dispersion combined with stirring is used for dispersion. The ultrasonic dispersion power is 200-400W and the frequency is 20-40kHz.

[0016] In step S1, the heating conditions are 40-60℃.

[0017] In step S2, the heating temperature is 40-60℃; the target temperature in the cooling process is 25-35℃.

[0018] In the wetting process of step S3, the liquid content is controlled to be 150%-300%.

[0019] In the low-temperature drying of step S3, hot air circulation drying is used at a temperature of 60-80℃, and the target moisture content is 8%-12%.

[0020] In the spraying process, a double-sided spraying method is adopted, and the spraying pressure is 0.2-0.4MPa.

[0021] Compared with existing products, the graphene-based deodorizing spunlace nonwoven fabric prepared by this invention has the following beneficial effects:

[0022] 1. Dual Odor Removal, Long-Lasting Effect: Graphene derivatives, with their ultra-large specific surface area, can physically adsorb various odor molecules (such as ammonia, hydrogen sulfide, and formaldehyde produced by sweat, cooking fumes, and formaldehyde). Simultaneously, the compounded plant-based odor-removing essential oils can synergistically remove odors through chemical decomposition or masking. This dual mechanism combining physical adsorption and chemical action effectively solves the problems of traditional odor removers (such as activated carbon) being prone to adsorption saturation and functional component loss, achieving long-lasting and highly efficient odor removal. The 24-hour removal rate for ammonia, hydrogen sulfide, and formaldehyde is ≥90%.

[0023] 2. Broad-spectrum antibacterial, safe and stable: Graphene material itself can destroy the cell membrane of microorganisms through physical puncture effect, and produce a compound synergistic effect with the chemical antibacterial agents added to the formula, thereby achieving broad-spectrum and highly effective inhibition of bacteria and fungi such as Escherichia coli and Staphylococcus aureus, while avoiding the irritation of traditional antibacterial agents. The product is highly safe and suitable for sensitive skin, with an antibacterial rate of ≥99% against Escherichia coli and Staphylococcus aureus.

[0024] 3. Skin-friendly and multi-functional: The functional liquid is formulated with amino acids or amino acid derivatives, vitamins, and moisturizers. These ingredients not only give the non-woven fabric deodorizing and antibacterial functions, but also provide skin care and moisturizing benefits during use. This effectively solves the problem of dry and tight skin that may result from traditional non-woven fabrics (especially disposable face towels), achieving a multi-functional integration of cleansing, deodorizing, antibacterial, and skin care, significantly improving the user experience.

[0025] 4. Process adaptability and easy mass production: The preparation method of this invention adopts a process route of impregnating or spraying functional liquid onto spunlace nonwoven fabric substrate and then drying it at low temperature. This process is highly compatible with existing spunlace nonwoven fabric production lines, without the need for large-scale equipment modification or investment in expensive new equipment, which facilitates rapid technology transfer and large-scale production.

[0026] 5. Stable performance and water-resistant: Through optimized dispersing agents and processes, functional components such as graphene can be stably attached or combined on non-woven fibers. The resulting product has excellent water-resistant performance and retains its deodorizing and antibacterial properties after multiple uses, extending the product's service life and improving its durability. The antibacterial rate is still ≥95% after 5 washes. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which further describe the technical solutions, but are not limited to these embodiments.

[0028] A method for preparing a graphene-based deodorizing spunlace nonwoven fabric, comprising the following raw materials: 60-90 parts deionized water, 0.1-2 parts graphene derivative, 0.1-0.5 parts vitamin, 0.5-0.8 parts functional additives, 5-10 parts humectant, 0.1-0.5 parts antibacterial agent, and 0.5-2 parts dispersant; the graphene derivative is selected from at least one of graphene oxide, reduced graphene oxide, and graphene quantum dots; the functional additive is at least one of sodium pyrrolidone carboxylate, undecylenoyl phenylalanine, and sodium hyaluronate; the spunlace nonwoven fabric substrate is one or more blends of cotton fiber, viscose fiber, polyester fiber, and bamboo fiber, with a basis weight of 30-120 g / m², specifically including the following steps:

[0029] (1) Preparation of graphene dispersion: Add deionized water to a stirring container, heat to 40-60℃, add dispersing agent, and stir until completely dissolved; slowly add graphene derivative, ultrasonically disperse for 15-30 min, and then stir for 20-30 min to obtain a uniform and stable graphene dispersion; the ultrasonic dispersion power is 200-400W and the frequency is 20-40kHz to ensure that the graphene derivative is fully exfoliated and uniformly dispersed.

[0030] (2) Functional liquid compounding: Add humectant, vitamin and antibacterial agent to graphene dispersion in sequence, maintain 40-60℃, stir for 15-20min until completely dissolved; cool to 25-35℃, add plant deodorizing essential oil and functional additive, stir for 20-30min, filter to remove impurities, and obtain graphene functional liquid.

[0031] (3) Non-woven fabric spraying: The spunlace non-woven fabric substrate is treated with a double-sided spraying process. After the process is completed, a suction process is performed on the fabric to allow the sprayed liquid to spread more evenly on the fabric surface. The liquid content is controlled at 150%-300%. The spraying pressure is 0.2-0.4MPa to ensure that the functional liquid penetrates evenly into the non-woven fabric fibers.

[0032] (4) Low temperature drying: The drying method is hot air circulation drying to avoid high temperature damage to graphene structure and active ingredients. The temperature is 60-80℃, and the moisture content is dried to 8%-12% to obtain graphene-based deodorized spunlace nonwoven fabric.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or substitute them with similar methods, without departing from the spirit of the invention or exceeding its defined scope. Although the invention has been described in detail above, such descriptions are considered illustrative or exemplary rather than restrictive. It should be understood that changes and modifications can be made by those skilled in the art within the scope of the following claims.

Claims

1. A method for preparing a graphene-based deodorizing spunlace nonwoven fabric, characterized in that, Specifically, the following steps are included: S1. Water, dispersing agent and graphene derivative are mixed under heating conditions and dispersed to form a uniform and stable graphene dispersion; the graphene derivative is selected from at least one of graphene oxide, reduced graphene oxide and graphene quantum dots. S2. Add humectant, vitamin, and antibacterial agent to the graphene dispersion, stir until dissolved under heating conditions, then cool down, add plant deodorizing essential oil and functional additive, stir to mix evenly, and finally filter to remove impurities to obtain functional liquid; the functional additive is at least one of sodium pyrrolidone carboxylate, undecenoyl phenylalanine, and sodium hyaluronate. S3. Using an impregnation or spraying process, the spunlace nonwoven fabric substrate is moistened with a functional liquid and then dried at a low temperature to the target moisture content to obtain a graphene-based deodorizing spunlace nonwoven fabric.

2. The method for preparing graphene-based deodorizing spunlace nonwoven fabric as described in claim 1, characterized in that, By weight ratio, the ratio of water:graphene derivative:vitamin:functional additive:humectant:antibacterial agent:dispersant is 60-90:0.1-2:0.1-0.5:0.5-0.8:5-10:0.1-0.5:0.5-2.

3. The method for preparing graphene-based deodorizing spunlace nonwoven fabric as described in claim 1, characterized in that, The spunlace nonwoven fabric substrate is at least one of cotton fiber, viscose fiber, polyester fiber, and bamboo fiber.

4. The method for preparing graphene-based deodorizing spunlace nonwoven fabric as described in claim 1, characterized in that, In the dispersion process of step S1, ultrasonic dispersion combined with stirring is used for dispersion. The ultrasonic dispersion power is 200-400W and the frequency is 20-40kHz.

5. The method for preparing graphene-based deodorizing spunlace nonwoven fabric as described in claim 1, characterized in that, In step S1, the heating conditions are 40-60℃.

6. The method for preparing graphene-based deodorizing spunlace nonwoven fabric as described in claim 1, characterized in that, In step S2, the heating temperature is 40-60℃; the target temperature in the cooling process is 25-35℃.

7. The method for preparing graphene-based deodorizing spunlace nonwoven fabric as described in claim 1, characterized in that, In the wetting process of step S3, the liquid content is controlled to be 150%-300%.

8. The method for preparing graphene-based deodorizing spunlace nonwoven fabric as described in claim 1, characterized in that, In the low-temperature drying of step S3, hot air circulation drying is used at a temperature of 60-80℃, and the target moisture content is 8%-12%.

9. The method for preparing graphene-based deodorizing spunlace nonwoven fabric as described in claim 1, characterized in that, In the spraying process, a double-sided spraying method is adopted, and the spraying pressure is 0.2-0.4MPa.