Thermal insulation antibacterial graphene fabric and preparation method thereof

Abstract

The present application relates to a kind of heat preservation antibacterial graphene fabric and its preparation method, belong to the technical field of fabric.The textile line of heat preservation antibacterial graphene fabric disclosed in the present application uses graphene filament as the core of composite spinning, and the composite spinning is wrapped by layer, wherein the composite spinning is composed of seaweed fiber filament and modified pure cotton filament, the seaweed fiber filament has good hygroscopicity and antibacterial property, and the modified pure cotton filament is soaked with antibacterial agent and strengthened with curing agent to improve antibacterial time effectiveness, then the seaweed fiber filament and the modified pure cotton filament synergistically improve antibacterial effect, in addition, graphene also has antibacterial property, forming double-layer antibacterial effect inside and outside.When sweat is produced, the seaweed fiber on the inside side contacts water and forms gel layer quickly, effectively prevents the air outside environment from convection with the air inside clothes to reduce heat loss, and the core-spun structure reduces heat transfer, further enhances the heat preservation effect, and the gel layer evaporates with the effect of body temperature and the convection of external air, forming cold and hot dynamic balance.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology and relates to a heat-insulating and antibacterial graphene fabric and its preparation method. Background Technology

[0002] Currently, people's demands for textiles and clothing go beyond just warmth; environmental protection, hygiene, health, comfort, and healthcare are also topics of great concern to consumers. Graphene, a two-dimensional carbon nanomaterial composed of carbon atoms and only one atom thick, is extracted from graphite. It is currently the thinnest, strongest, and most electrically and thermally conductive new type of two-dimensional nanomaterial, possessing excellent mechanical, thermal, electrical, physical, and chemical properties. However, the production process of pure graphene fibers is difficult and inefficient, making it unsuitable for commercialization.

[0003] Existing technologies have developed graphene composite fibers through methods such as mixing graphene with spinning solutions, introducing polymers into graphene fibers, and coating. These methods have solved the problem of poor spinnability of high-purity graphene fibers. Modified conventional fibers exhibit significant improvements in strength, electrical and thermal conductivity, far-infrared emission, antistatic properties, and corrosion resistance, thus broadening the application areas of graphene fibers to some extent. However, relying solely on the antibacterial properties of graphene itself is insufficient to achieve the desired effect. Furthermore, polymer-based spinning solutions are slightly inferior to pure cotton fibers in terms of moisture absorption and skin-friendliness. Therefore, this invention proposes a thermally insulating and antibacterial graphene fabric and its preparation method, further optimizing existing technologies to obtain a fabric with excellent antibacterial and thermal insulation properties. Summary of the Invention

[0004] This invention relates to a thermal insulation and antibacterial graphene fabric and its preparation method, belonging to the field of fabric technology. The thermal insulation and antibacterial graphene fabric disclosed in this invention uses graphene filaments as the core and composite spinning as the wrapping layer. The composite spinning layer consists of seaweed fiber filaments and modified pure cotton filaments. The seaweed fiber filaments have good moisture absorption and antibacterial properties, while the modified pure cotton filaments are soaked in an antibacterial agent and cured with a curing agent to enhance the antibacterial effect. Thus, the seaweed fiber filaments and modified pure cotton filaments synergistically improve the antibacterial effect. Additionally, graphene also possesses antibacterial properties, forming a double-layer antibacterial effect. When sweat is produced, the inner seaweed fiber quickly absorbs the moisture and forms a gel layer, effectively preventing air convection between the outside environment and the inside of the garment, thus reducing heat loss. Simultaneously, the core-spun yarn structure reduces heat transfer, further enhancing the thermal insulation effect. The gel layer evaporates due to body temperature and external air convection, forming a dynamic balance between heat and cold.

[0005] The objective of this invention can be achieved through the following technical solutions: A thermal insulation and antibacterial graphene fabric, wherein the textile yarn of the thermal insulation and antibacterial graphene fabric is composed of a core and a wrapping layer, wherein the core is a graphene filament, and the wrapping layer is obtained by twisting seaweed fiber filaments and modified pure cotton filaments in a mass ratio of 1:1-2.

[0006] Furthermore, the method for preparing the seaweed fiber filaments includes the following steps: (1) Alginate, nano-silver antibacterial agent and water are mixed to form a viscous liquid; (2) The filaments are obtained by extrusion through the spinneret orifice and then stretched to become seaweed fiber filaments.

[0007] Further, in step (1), the mass ratio of alginate, nano-silver antibacterial agent and water is 2-5:0.5-0.8:15-20, wherein the nano-silver antibacterial agent is silver ion supported by zirconium phosphate, and the alginate is composed of sodium alginate and calcium alginate in a mass ratio of 1:1-2.

[0008] Furthermore, in step (2), the linear density of the seaweed fiber filaments is 5.5-5.8 tex.

[0009] Furthermore, the preparation method of the modified pure cotton filament is as follows: soak the pure cotton filament in an antibacterial agent at room temperature, then take it out and put it in a curing agent, take it out and wash it with water, and dry it to obtain the modified pure cotton filament.

[0010] Furthermore, the antibacterial agent is formed by mixing bergamot extract, camphor leaf extract, chitosan and water in a mass ratio of 1:1-2:10-12:25-30, and the soaking time is 1-2 hours.

[0011] Furthermore, the curing agent is formed by mixing polydimethylsiloxane and ethyl acetate in a mass ratio of 1-2:8-10, and the modified pure cotton filament has a linear density of 5.5-6.0 tex.

[0012] Furthermore, the preparation method of the heat-insulating and antibacterial graphene fabric includes the following steps: A1: A composite spun yarn is obtained by twisting seaweed fiber filaments and modified pure cotton filaments; A2: Using graphene filaments as the core and composite spinning as the outer layer, core-spun yarn is spun using a cotton fancy spinning machine to obtain textile yarn, which is then spun into fabric with a honeycomb structure.

[0013] Furthermore, in step A2, the core-spun yarn is spun three times, and the linear density of the textile thread is 30-55 tex.

[0014] The beneficial effects of this invention are: 1. The thermal insulation and antibacterial graphene fabric of the present invention uses graphene filaments as the core and composite spinning as the wrapping layer. The composite spinning consists of seaweed fiber filaments and modified pure cotton filaments. The seaweed fiber filaments have good moisture absorption and antibacterial properties, while the modified pure cotton filaments are soaked in antibacterial agents and cured with a curing agent to enhance the antibacterial effect. Thus, the seaweed fiber filaments and modified pure cotton filaments work synergistically to improve the antibacterial effect. In addition, graphene also has antibacterial properties, forming a double-layer antibacterial effect. When sweat is produced, the seaweed fiber on the inside comes into contact with water and quickly absorbs it to form a gel layer, which effectively prevents the convection between the external air and the air inside the clothing, thereby reducing heat loss. At the same time, the core-spun yarn structure reduces heat transfer, further enhancing the thermal insulation effect. The gel layer evaporates with the action of body temperature and external air convection, forming a dynamic balance between cold and heat, resulting in an excellent antibacterial and thermal insulation fabric. Detailed Implementation

[0015] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of the present invention, in conjunction with embodiments, is provided below.

[0016] The graphene filaments involved in this invention are graphene polyester filaments, purchased from Shandong Rare Science and Technology Development Co., Ltd., with a linear density of 8 tex; sodium alginate and calcium alginate were purchased from Langfang Qianyao Technology Co., Ltd.; zirconium phosphate loaded with silver ions was purchased from Shanghai Yingcheng New Materials Co., Ltd., model YC-LSG200; bergamot extract was purchased from Baoji Kaiweikang Biotechnology Co., Ltd.; camphor leaf extract was purchased from Lanzhou Waterles Biotechnology Co., Ltd.; chitosan was purchased from Lanzhou Waterles Biotechnology Co., Ltd., with a chitin deacetylation degree of 92%; polydimethylsiloxane was purchased from Shandong Jinshengtai Chemical Co., Ltd., CAS number 9006-65-9.

[0017] Example 1 A thermal insulation and antibacterial graphene fabric, wherein the textile yarn of the thermal insulation and antibacterial graphene fabric is composed of a core and a wrapping layer, wherein the core is a graphene filament, and the wrapping layer is obtained by twisting seaweed fiber filaments and modified pure cotton filaments in a mass ratio of 1:1.

[0018] The method for preparing the seaweed fiber filaments includes the following steps: (1) Alginate, nano-silver antibacterial agent and water are mixed to form a viscous liquid; (2) The filaments are obtained by extrusion through the spinneret orifice and then stretched to become seaweed fiber filaments.

[0019] In step (1), the mass ratio of alginate, nano-silver antibacterial agent and water is 2:0.5:15, wherein the nano-silver antibacterial agent is silver ion loaded with zirconium phosphate, and the alginate is composed of sodium alginate and calcium alginate in a mass ratio of 1:1.

[0020] The linear density of the seaweed fiber filaments in step (2) is 5.5 tex.

[0021] The modified pure cotton filament is prepared by soaking the pure cotton filament in an antibacterial agent at room temperature, then taking it out and placing it in a curing agent, then washing it with clean water and drying it to obtain the modified pure cotton filament.

[0022] The antibacterial agent is formed by mixing bergamot extract, camphor leaf extract, chitosan and water in a mass ratio of 1:1:10:25, and the soaking time is 1 hour.

[0023] The curing agent is formed by mixing polydimethylsiloxane and ethyl acetate in a mass ratio of 1:8, and the modified pure cotton filament has a linear density of 5.5 tex.

[0024] The preparation method of the thermal insulation and antibacterial graphene fabric includes the following steps: A1: A composite spun yarn is obtained by twisting seaweed fiber filaments and modified pure cotton filaments; A2: Using graphene filaments as the core and composite spinning as the outer layer, core-spun yarn is spun using a cotton fancy spinning machine to obtain textile yarn, which is then spun into fabric with a honeycomb structure.

[0025] In step A2, the core-spun yarn is spun three times, and the linear density of the textile thread is 30 tex.

[0026] Example 2 A thermal insulation and antibacterial graphene fabric, wherein the textile yarn of the thermal insulation and antibacterial graphene fabric is composed of a core and a wrapping layer, wherein the core is a graphene filament, and the wrapping layer is obtained by twisting seaweed fiber filaments and modified pure cotton filaments in a mass ratio of 1:1.5.

[0027] The method for preparing the seaweed fiber filaments includes the following steps: (1) Alginate, nano-silver antibacterial agent and water are mixed to form a viscous liquid; (2) The filaments are obtained by extrusion through the spinneret orifice and then stretched to become seaweed fiber filaments.

[0028] In step (1), the mass ratio of alginate, nano-silver antibacterial agent and water is 3.5:0.65:17.5, wherein the nano-silver antibacterial agent is silver ion supported by zirconium phosphate, and the alginate is composed of sodium alginate and calcium alginate in a mass ratio of 1:1.5.

[0029] The linear density of the seaweed fiber filaments in step (2) is 5.7 tex.

[0030] The modified pure cotton filament is prepared by soaking the pure cotton filament in an antibacterial agent at room temperature, then taking it out and placing it in a curing agent, then washing it with clean water and drying it to obtain the modified pure cotton filament.

[0031] The antibacterial agent is formed by mixing bergamot extract, camphor leaf extract, chitosan and water in a mass ratio of 1:1.5:11:28, and the soaking time is 1.5 hours.

[0032] The curing agent is formed by mixing polydimethylsiloxane and ethyl acetate in a mass ratio of 1.5:9, and the modified pure cotton filament has a linear density of 5.8 tex.

[0033] The preparation method of the thermal insulation and antibacterial graphene fabric includes the following steps: A1: A composite spun yarn is obtained by twisting seaweed fiber filaments and modified pure cotton filaments; A2: Using graphene filaments as the core and composite spinning as the outer layer, core-spun yarn is spun using a cotton fancy spinning machine to obtain textile yarn, which is then spun into fabric with a honeycomb structure.

[0034] In step A2, the core-spun yarn is spun three times, and the linear density of the textile thread is 40 tex.

[0035] Example 3 A thermal insulation and antibacterial graphene fabric, wherein the textile yarn of the thermal insulation and antibacterial graphene fabric is composed of a core and a wrapping layer, wherein the core is a graphene filament, and the wrapping layer is obtained by twisting seaweed fiber filaments and modified pure cotton filaments in a mass ratio of 1:2.

[0036] The method for preparing the seaweed fiber filaments includes the following steps: (1) Alginate, nano-silver antibacterial agent and water are mixed to form a viscous liquid; (2) The filaments are obtained by extrusion through the spinneret orifice and then stretched to become seaweed fiber filaments.

[0037] In step (1), the mass ratio of alginate, nano-silver antibacterial agent and water is 5:0.8:20, wherein the nano-silver antibacterial agent is silver ion loaded with zirconium phosphate, and the alginate is composed of sodium alginate and calcium alginate in a mass ratio of 1:2.

[0038] The linear density of the seaweed fiber filaments in step (2) is 5.8 tex.

[0039] The modified pure cotton filament is prepared by soaking the pure cotton filament in an antibacterial agent at room temperature, then taking it out and placing it in a curing agent, then washing it with clean water and drying it to obtain the modified pure cotton filament.

[0040] The antibacterial agent is formed by mixing bergamot extract, camphor leaf extract, chitosan and water in a mass ratio of 1:2:12:30, and the soaking time is 2 hours.

[0041] The curing agent is formed by mixing polydimethylsiloxane and ethyl acetate in a mass ratio of 2:10, and the modified pure cotton filament has a linear density of 6.0 tex.

[0042] The preparation method of the thermal insulation and antibacterial graphene fabric includes the following steps: A1: A composite spun yarn is obtained by twisting seaweed fiber filaments and modified pure cotton filaments; A2: Using graphene filaments as the core and composite spinning as the outer layer, core-spun yarn is spun using a cotton fancy spinning machine to obtain textile yarn, which is then spun into fabric with a honeycomb structure.

[0043] In step A2, the core-spun yarn is spun three times, and the linear density of the textile yarn is 55 tex.

[0044] Comparative Example 1 Based on Example 2, the mass ratio of seaweed fiber filaments to modified pure cotton filaments was adjusted to 1:3, while other conditions remained the same as in Example 2.

[0045] Comparative Example 2 Based on Example 2, the mass ratio of seaweed fiber filaments to modified pure cotton filaments was adjusted to 2:1, while other conditions remained the same as in Example 2.

[0046] Comparative Example 3 Based on Example 2, a heat-insulating and antibacterial graphene fabric is provided, wherein the textile yarn of the heat-insulating and antibacterial graphene fabric is composed of a core and a wrapping layer, wherein the core is a graphene filament and the wrapping layer is an algae fiber filament.

[0047] The method for preparing the seaweed fiber filaments includes the following steps: (1) Alginate, nano-silver antibacterial agent and water are mixed to form a viscous liquid; (2) The filaments are obtained by extrusion through the spinneret orifice and then stretched to become seaweed fiber filaments.

[0048] In step (1), the mass ratio of alginate, nano-silver antibacterial agent and water is 3.5:0.65:17.5, wherein the nano-silver antibacterial agent is silver ion supported by zirconium phosphate, and the alginate is composed of sodium alginate and calcium alginate in a mass ratio of 1:1.5.

[0049] The linear density of the seaweed fiber filaments in step (2) is 5.7 tex.

[0050] The preparation method of the heat-insulating and antibacterial graphene fabric is as follows: using graphene filaments as the core and seaweed fiber filaments as the outer layer, the core-spun yarn is spun using a cotton fancy spinning machine to obtain textile yarn, and the textile yarn is spun into fabric with a honeycomb structure.

[0051] In step A2, the core-spun yarn is spun three times, and the linear density of the textile thread is 40 tex.

[0052] Comparative Example 4 Based on Example 2, a thermal insulation and antibacterial graphene fabric is provided, wherein the textile yarn of the thermal insulation and antibacterial graphene fabric is composed of a core and a wrapping layer, wherein the core is a graphene filament and the wrapping layer is a modified pure cotton filament.

[0053] The modified pure cotton filament is prepared by soaking the pure cotton filament in an antibacterial agent at room temperature, then taking it out and placing it in a curing agent, then washing it with clean water and drying it to obtain the modified pure cotton filament.

[0054] The antibacterial agent is formed by mixing bergamot extract, camphor leaf extract, chitosan and water in a mass ratio of 1:1.5:11:28, and the soaking time is 1.5 hours.

[0055] The curing agent is formed by mixing polydimethylsiloxane and ethyl acetate in a mass ratio of 1.5:9, and the modified pure cotton filament has a linear density of 5.8 tex.

[0056] The preparation method of the heat-insulating and antibacterial graphene fabric is as follows: using graphene filament as the core and modified pure cotton filament as the outer layer, the core-spun yarn is spun using a cotton fancy spinning machine to obtain the textile yarn, and the textile yarn is spun into fabric with a honeycomb structure.

[0057] In step A2, the core-spun yarn is spun three times, and the linear density of the textile thread is 40 tex.

[0058] Comparative Example 5 Based on Example 2, the antibacterial agent bergamot extract was removed from the preparation process of modified pure cotton filaments and replaced with an equal mass of camphor leaf extract, while other conditions remained the same as in Example 2.

[0059] Comparative Example 6 Based on Example 2, the antibacterial camphor leaf extract component in the preparation process of modified pure cotton filament was removed and replaced with an equal mass of bergamot extract, while other conditions remained the same as in Example 2.

[0060] Comparative Example 7 Based on Example 2, the antibacterial chitosan component in the preparation process of modified pure cotton filament was removed and replaced with an equal mass of camphor leaf extract, while other conditions remained the same as in Example 2.

[0061] Comparative Example 8 Based on the example, the "adding curing agent" step in the preparation process of modified pure cotton filaments was removed, while other conditions remained the same as in Example 2.

[0062] Performance testing The thermal insulation and antibacterial graphene fabrics prepared in Examples 1-3 and Comparative Examples 1-8 were cut into 30cm×30cm sizes and used as samples. The samples in Examples 1-3 and Comparative Examples 1-4 were tested for moisture regain using a thermal conductivity meter, a fabric air permeability tester, and according to GB / T6503-2017 "Test Method for Moisture Regain of Chemical Fibers". The thermal conductivity, air permeability and moisture permeability of the samples were tested using a YG601H-Ⅲ computerized fabric moisture permeability meter. The test results are shown in Table 1. Examples 1-3 and Comparative Examples 3-8 were tested according to GB / T 20944.1-2007 "Evaluation of antimicrobial properties of textiles - Part 1: Agar plate diffusion method" to determine the antimicrobial rate against Staphylococcus aureus, Escherichia coli and Candida albicans, and according to GB / T24253-2009 "Evaluation of antimite properties of textiles" to test the mite inhibition rate; the test results are shown in Table 2.

[0063] Table 1 Test Results Analysis of the results in Table 1 shows that Examples 1-3 have better moisture absorption and heat retention than Comparative Examples 1-4. In Comparative Example 1, the proportion of modified pure cotton filaments in the composite spinning was increased, which increased the thermal conductivity. The air permeability remained unchanged, but the reduction in seaweed fiber filaments led to a decrease in moisture absorption, which increased air convection and further reduced the heat retention effect. In Comparative Example 2, the proportion of seaweed fiber filaments in the composite spinning was increased. Although the thermal conductivity decreased, the air permeability also decreased, affecting comfort. The outer layer of the spinning yarn in Comparative Examples 3 and 4 was seaweed fiber filaments or modified pure cotton filaments. The air permeability or moisture absorption of the single spinning yarn was poor.

[0064] Table 1 Test Results Analysis of the results in Table 2 shows that the antibacterial rates and mite inhibition rates of Staphylococcus aureus, Escherichia coli, and Candida albicans in Examples 1-3 are significantly higher than those in Comparative Examples 3-8. In Comparative Examples 3-4, the outer sheath of the spun yarn was made of seaweed fiber or modified pure cotton yarn; the antibacterial effect of single spinning was poor. In Comparative Examples 5-7, removing one of the following—bergamot extract, camphor leaf extract, or chitosan—significantly reduced the antibacterial rates against Staphylococcus aureus, Escherichia coli, and Candida albicans. Furthermore, in terms of mite inhibition rate, removing bergamot extract or camphor leaf extract had a greater impact on mites than removing chitosan. In Comparative Example 8, the addition of a curing agent during the modification of the pure cotton yarn resulted in the antibacterial agent not adhering properly, causing it to detach and reducing its antibacterial and mite-removing effects.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A thermal insulation and antibacterial graphene fabric, characterized in that, The textile yarn of the heat-insulating and antibacterial graphene fabric consists of a core and a wrapping layer, wherein the core is a graphene filament and the wrapping layer is obtained by twisting seaweed fiber filaments and modified pure cotton filaments in a mass ratio of 1:1-2.

2. The thermal insulation and antibacterial graphene fabric according to claim 1, characterized in that, The method for preparing the seaweed fiber filaments includes the following steps: (1) Alginate, nano-silver antibacterial agent and water are mixed to form a viscous liquid; (2) The filaments are obtained by extrusion through the spinneret orifice and then stretched to become seaweed fiber filaments.

3. The thermal insulation and antibacterial graphene fabric according to claim 2, characterized in that, In step (1), the mass ratio of alginate, nano-silver antibacterial agent and water is 2-5:0.5-0.8:15-20, wherein the nano-silver antibacterial agent is silver ion supported by zirconium phosphate, and the alginate is composed of sodium alginate and calcium alginate in a mass ratio of 1:1-2.

4. The thermal insulation and antibacterial graphene fabric according to claim 2, characterized in that, The linear density of the seaweed fiber filaments in step (2) is 5.5-5.8 tex.

5. The thermal insulation and antibacterial graphene fabric according to claim 1, characterized in that, The modified pure cotton filament is prepared by soaking the pure cotton filament in an antibacterial agent at room temperature, then taking it out and placing it in a curing agent, then washing it with clean water and drying it to obtain the modified pure cotton filament.

6. The thermal insulation and antibacterial graphene fabric according to claim 5, characterized in that, The antibacterial agent is formed by mixing bergamot extract, camphor leaf extract, chitosan and water in a mass ratio of 1:1-2:10-12:25-30, and the soaking time is 1-2 hours.

7. The thermal insulation and antibacterial graphene fabric according to claim 5, characterized in that, The curing agent is formed by mixing polydimethylsiloxane and ethyl acetate in a mass ratio of 1-2:8-10, and the modified pure cotton filament has a linear density of 5.5-6.0 tex.

8. The thermal insulation and antibacterial graphene fabric according to claim 1, characterized in that, The preparation method of the thermal insulation and antibacterial graphene fabric includes the following steps: A1: A composite spun yarn is obtained by twisting seaweed fiber filaments and modified pure cotton filaments; A2: Using graphene filaments as the core and composite spinning as the outer layer, core-spun yarn is spun using a cotton fancy spinning machine to obtain textile yarn, which is then spun into fabric with a honeycomb structure.

9. The thermal insulation and antibacterial graphene fabric according to claim 8, characterized in that, In step A2, the core-spun yarn is spun three times, and the linear density of the textile yarn is 30-55 tex.

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