Antibacterial and antistatic fabric and preparation process

Abstract

The present invention relates to an antibacterial and antistatic fabric and a preparation process, belonging to the technical field of fabric preparation, wherein the preparation process comprises the following steps: S10, preparing a post-treatment liquid for standby use: S20, mixing the fabric and the post-treatment liquid, and treating to obtain the antibacterial and antistatic fabric. In the process of preparing the post-treatment liquid, the present invention first reacts benzyl chloride and triethanolamine to form an intermediate material, then adds hyperbranched polyester H20 and phthalic anhydride to form a post-treatment liquid with a hyperbranched structure, and further adds hydroxypropyl trimethyl ammonium chloride chitosan compounded with dimethyl octadecyl [3-(trimethoxysilyl)propyl] ammonium chloride, the two synergistically make the prepared fabric have excellent antibacterial performance, and the fabric is applied in the process of fabric preparation, and a layer of electrostatic shielding layer can be effectively formed on the surface of the fabric, so that the charge on the surface of the fabric is rapidly dissipated, thereby weakening the electrostatic effect, so that the fabric has excellent antistatic effect and antibacterial performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of fabric preparation, and in particular, relates to an antibacterial and antistatic fabric and a preparation process thereof. Background Art

[0002] As people's requirements for health and comfort are increasing, antibacterial and antistatic fabrics, as a new type of functional fabric, have gradually received widespread attention and application in the textile industry. Antibacterial and antistatic fabrics have multiple functions such as inhibiting bacterial growth, preventing static electricity accumulation and preventing pollution. They are suitable for clothing, medical and home furnishing fields. The use of antibacterial and antistatic fabrics can increase the cleanliness of users and ensure their sense of security. However, as far as the fabrics currently sold on the market are concerned, many fabrics are still prone to accumulate static electricity, which will cause discomfort and skin irritation to people; in addition, although many fabrics on the market are claimed to have antibacterial effects, once tested, their antibacterial effects are extremely poor. Fabrics with poor antibacterial effects are prone to bacterial growth and reproduction on the fabrics, thereby increasing the risk of cross-infection for users. Therefore, it is particularly important to develop an antibacterial and antistatic fabric to meet the functional needs of fabrics in different fields, and this research is beneficial to provide people with a healthier and more comfortable experience in life and work. Summary of the invention

[0003] The object of the present invention is to provide an antibacterial and antistatic fabric and a preparation process. The present invention first prepares a post-treatment liquid, and then mixes and treats the fabric and the post-treatment liquid to obtain the antibacterial and antistatic fabric. In the process of preparing the post-treatment liquid, the present invention first reacts benzyl chloride and triethanolamine to form an intermediate material, and then adds hyperbranched polyester H20 and phthalic anhydride to form a post-treatment liquid with a hyperbranched structure. When the post-treatment liquid is used in the fabric preparation process, an electrostatic shielding layer can be effectively formed on the surface of the fabric, so that the charge on the surface of the fabric is quickly dissipated, thereby weakening the electrostatic effect and achieving an excellent antistatic effect; in addition, the present invention also adds hydroxypropyl trimethyl ammonium chloride chitosan compounded with dimethyl octadecyl [3- (trimethoxysilyl) propyl] ammonium chloride, and the two synergistically make the prepared fabric have excellent antibacterial properties; the problem of poor antibacterial and antistatic properties of fabrics in the prior art is solved.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A preparation process of an antibacterial and antistatic fabric, the preparation process comprising the following steps:

[0006] S10, prepare post-treatment solution for standby use:

[0007] S20, mixing the fabric and the post-treatment liquid, and treating them to obtain the antibacterial and antistatic fabric;

[0008] Wherein, the step S10 is specifically as follows:

[0009] S11, controlling the temperature to mix triethanolamine and deionized water uniformly, adding benzyl chloride dropwise, and controlling the temperature to react after the addition is completed to obtain intermediate material A for standby use;

[0010] S12, the hyperbranched polyester H20 and dimethylformamide are mixed and stirred, sodium hydroxide is added and stirred again, after the stirring is completed, epichlorohydrin is added dropwise and nitrogen is introduced to control the temperature to react, after the reaction is completed, the pressure is reduced and the solid is removed by suction filtration to obtain an intermediate material B for standby use;

[0011] S13, controlling the temperature to mix and react the intermediate material A, the intermediate material B, phthalic anhydride and dimethylformamide, then adding hydroxypropyltrimethylammonium chloride chitosan and dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride and mixing to obtain a post-treatment liquid.

[0012] As a preferred embodiment of the present invention, in step S11, the triethanolamine is 27-30 parts by weight, the deionized water is 10-14 parts by weight, and the benzyl chloride is 33-36 parts by weight.

[0013] As a preferred embodiment of the present invention, the temperature of the temperature-controlled mixing in step S11 is 60-75°C; the method of adding benzyl chloride is adding dropwise while stirring; the temperature of the temperature-controlled reaction is 90-105°C, and the reaction time is 4-6h.

[0014] As a preferred embodiment of the present invention, in step S12, the hyperbranched polyester H20 is 1-1.5 parts by weight, dimethylformamide is 50-55 parts by weight, sodium hydroxide is 7-8 parts by weight, and epichlorohydrin is 16-17 parts by weight.

[0015] As a preferred embodiment of the present invention, the mixing and stirring time in step S12 is 15-30 minutes; the stirring time is 3-5 minutes; the epichlorohydrin is added dropwise; the temperature of the nitrogen-controlled reaction is 50-55°C, and the reaction time is 12-14 hours.

[0016] As a preferred embodiment of the present invention, in step S13, the phthalic anhydride is 8-11 parts by weight, the dimethylformamide is 60-80 parts by weight, the hydroxypropyltrimethylammonium chloride chitosan is 25-34 parts by weight and the dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride is 20-28 parts by weight.

[0017] As a preferred embodiment of the present invention, the temperature of the temperature-controlled mixing reaction in step S13 is 100-110° C., and the reaction time is 2-3 h; and the mixing and stirring time is 0.5-1 h.

[0018] As a preferred solution of the present invention, step S20 is specifically as follows:

[0019] The fabric is immersed in the post-treatment liquid at a first bath ratio under controlled temperature, followed by temperature and pressure padding treatment, temperature-controlled drying after the treatment, and after drying, immersed in water at a second bath ratio for heat preservation, taken out, and rolled out, and the fabric is taken out and dried to obtain the antibacterial and antistatic fabric.

[0020] As a preferred solution of the present invention, the fabric is woven from polyester.

[0021] As a preferred embodiment of the present invention, the first bath ratio is 1:30-40g / mL; the immersion temperature of the temperature-controlled immersion is 40-50°C, and the immersion time is 50-70min; the temperature-controlled and pressure-controlled immersion and rolling treatment is specifically a temperature-controlled 85-95°C, a pressure-controlled 5-8MPa immersion and rolling treatment for 4-6min; the temperature of the temperature-controlled drying is 40-55°C, and the time is 10-15min; the second bath ratio is 1:25-30g / mL; the insulation temperature is 65-75°C, and the insulation time is 30-45min; the rolling rate of the removal and rolling liquid is 70-80%; the drying temperature is 90-105°C, and the time is 12-14h.

[0022] An antibacterial and antistatic fabric is prepared by the preparation process of the antibacterial and antistatic fabric.

[0023] Beneficial effects of the present invention:

[0024] (1) The present invention first reacts benzyl chloride and triethanolamine to form an intermediate material, and then adds hyperbranched polyester H20 and phthalic anhydride to form a post-treatment liquid with a hyperbranched structure. The post-treatment liquid is applied to the fabric preparation process to effectively form an electrostatic shielding layer on the fabric surface, so that the charge on the fabric surface is quickly dissipated, thereby weakening the electrostatic effect and achieving an excellent antistatic effect. The added hyperbranched polyester H20 introduces a network structure, increases the contact area between the post-treatment liquid and the fabric, and introduces an ester group with phthalic anhydride, increases the compatibility of the post-treatment liquid with the fabric, and strengthens the antistatic effect of the post-treatment liquid.

[0025] (2) The present invention adds hydroxypropyl trimethyl ammonium chloride chitosan and dimethyl octadecyl [3-(trimethoxysilyl) propyl] ammonium chloride, so that the prepared fabric has excellent antibacterial properties. This is because hydroxypropyl trimethyl ammonium chloride chitosan absorbs the negative charge on the surface of microorganisms through its positive charge, diffuses or penetrates the cell membrane, allows the macromolecular chain to enter the cell wall, and then destroys the cell membrane to release microbial cytoplasmic substances, resulting in bacterial inactivation; while dimethyl octadecyl [3-(trimethoxysilyl) propyl] ammonium chloride, with its silicon chain molecule growth effect, enhances the permeability on the fabric surface, can penetrate deeper into the fabric surface, assist hydroxypropyl trimethyl ammonium chloride chitosan in destroying the cell membrane, and further causes the death of bacteria, that is, the two work together to make the prepared fabric have excellent antibacterial properties. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The hyperbranched polyester H20 used in this application was purchased from Suzhou Haibote Resin Technology Co., Ltd.; hydroxypropyltrimethylammonium chloride chitosan was purchased from Hubei Handafei Biotechnology Co., Ltd.; dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride was purchased from Wuhan Huaxiang Kejie Biotechnology Co., Ltd.; no further details will be given later.

[0028] Example 1

[0029] A preparation process of an antibacterial and antistatic fabric, the preparation process comprising the following steps:

[0030] S10, prepare post-treatment solution for standby use:

[0031] S11, 27 parts by weight of triethanolamine and 12 parts by weight of deionized water were mixed at 60° C., and then 36 parts by weight of benzyl chloride were added dropwise while stirring. After the addition was completed, the temperature was controlled at 105° C. for reaction for 4 hours to obtain intermediate material A for standby use;

[0032] S12, 1 part by weight of hyperbranched polyester H20 and 50 parts by weight of dimethylformamide were mixed and stirred for 22 minutes, after the stirring was completed, 7 parts by weight of sodium hydroxide were added and stirred for 5 minutes, after the stirring was completed, 16.5 parts by weight of epichlorohydrin were added dropwise and nitrogen was introduced to control the temperature at 52°C to react for 14 hours, after the reaction was completed, the pressure was reduced and the solid was removed by suction filtration to obtain intermediate material B for standby use;

[0033] S13, the intermediate material A, the intermediate material B, 8 parts by weight of phthalic anhydride and 70 parts by weight of dimethylformamide were mixed and reacted at 105° C. for 3 hours, and then 25 parts by weight of hydroxypropyltrimethylammonium chloride chitosan and 28 parts by weight of dimethyloctadecyl [3-(trimethoxysilyl)propyl] ammonium chloride were added and stirred for 0.5 hours to obtain a post-treatment liquid;

[0034] S20, mixing the fabric and the post-treatment liquid, and treating them to obtain the antibacterial and antistatic fabric:

[0035] The fabric is immersed in the post-treatment liquid with a bath ratio of 1:35g / mL at a controlled temperature of 45°C for 70 minutes, and then the temperature is controlled at 85°C and the pressure is controlled at 6MPa for 6 minutes. After the treatment is completed, the temperature is controlled at 40°C and dried for 10 minutes. After drying, the fabric is immersed in water with a bath ratio of 1:30g / mL and kept at 65°C for 30 minutes, and then taken out and squeezed, wherein the squeezing rate is 80%. After squeezing, the fabric is taken out and dried at 98°C for 14 hours to obtain the antibacterial and antistatic fabric;

[0036] The fabric is made of polyester warp weaving.

[0037] Example 2

[0038] A preparation process of an antibacterial and antistatic fabric, the preparation process comprising the following steps:

[0039] S10, prepare post-treatment solution for standby use:

[0040] S11, 30 parts by weight of triethanolamine and 10 parts by weight of deionized water were mixed at 67° C., and then 33 parts by weight of benzyl chloride were added dropwise while stirring. After the addition was completed, the temperature was controlled at 97° C. for reaction for 6 hours to obtain intermediate material A for standby use;

[0041] S12, 1.5 parts by weight of hyperbranched polyester H20 and 52.5 parts by weight of dimethylformamide were mixed and stirred for 15 minutes, 8 parts by weight of sodium hydroxide were added after the stirring was completed, and the stirring was continued for 3 minutes, 17 parts by weight of epichlorohydrin were added dropwise after the stirring was completed, and nitrogen was introduced to control the temperature at 55°C to react for 12 hours, and after the reaction was completed, the pressure was reduced and the solid was removed by suction filtration to obtain an intermediate material B for standby use;

[0042] S13, the intermediate material A, the intermediate material B, 11 parts by weight of phthalic anhydride and 80 parts by weight of dimethylformamide were mixed and reacted at 110° C. for 2 hours, and then 34 parts by weight of hydroxypropyltrimethylammonium chloride chitosan and 24 parts by weight of dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride were added and stirred for 1 hour to obtain a post-treatment liquid;

[0043] S20, mixing the fabric and the post-treatment liquid, and treating them to obtain the antibacterial and antistatic fabric:

[0044] The fabric is immersed in the post-treatment liquid at a bath ratio of 1:30g / mL at a controlled temperature of 50°C for 50 minutes, and then the temperature is controlled at 95°C and the pressure is controlled at 5MPa for padding treatment for 5 minutes. After the treatment is completed, the temperature is controlled at 48°C and dried for 15 minutes. After drying, the fabric is immersed in water at a bath ratio of 1:25g / mL and kept at 70°C for 45 minutes, and then taken out and squeezed, wherein the squeezing rate is 70%. After squeezing, the fabric is taken out and dried at 90°C for 12 hours to obtain the antibacterial and antistatic fabric;

[0045] The fabric is made of polyester warp weaving.

[0046] Example 3

[0047] A preparation process of an antibacterial and antistatic fabric, the preparation process comprising the following steps:

[0048] S10, prepare post-treatment solution for standby use:

[0049] S11, 28 parts by weight of triethanolamine and 14 parts by weight of deionized water were mixed at 75° C., and then 34.5 parts by weight of benzyl chloride were added dropwise while stirring. After the addition was completed, the temperature was controlled at 90° C. for reaction for 5 hours to obtain intermediate material A for standby use;

[0050] S12, 1.3 parts by weight of hyperbranched polyester H20 and 55 parts by weight of dimethylformamide were mixed and stirred for 30 minutes, after the stirring was completed, 7.5 parts by weight of sodium hydroxide were added and stirred for another 4 minutes, after the stirring was completed, 16 parts by weight of epichlorohydrin were added dropwise and nitrogen was introduced to control the temperature at 50°C to react for 13 hours, after the reaction was completed, the pressure was reduced and the solid was removed by suction filtration to obtain an intermediate material B for standby use;

[0051] S13, the intermediate material A, the intermediate material B, 9.5 parts by weight of phthalic anhydride and 60 parts by weight of dimethylformamide were mixed and reacted at 100° C. for 2.5 hours, and then 30 parts by weight of hydroxypropyltrimethylammonium chloride chitosan and 20 parts by weight of dimethyloctadecyl [3-(trimethoxysilyl)propyl] ammonium chloride were added and mixed and stirred for 1 hour to obtain a post-treatment liquid;

[0052] S20, mixing the fabric and the post-treatment liquid, and treating them to obtain the antibacterial and antistatic fabric:

[0053] The fabric is immersed in the post-treatment liquid with a bath ratio of 1:40g / mL at a controlled temperature of 40°C for 60 minutes, and then the temperature is controlled at 90°C and the pressure is controlled at 8MPa for 4 minutes. After the treatment is completed, the temperature is controlled at 55°C and dried for 13 minutes. After drying, the fabric is immersed in water with a bath ratio of 1:28g / mL and kept at 75°C for 38 minutes, and then taken out and squeezed, wherein the squeezing rate is 75%. After squeezing, the fabric is taken out and dried at 105°C for 13 hours to obtain the antibacterial and antistatic fabric;

[0054] The fabric is made of polyester warp weaving.

[0055] Comparative Example 1

[0056] Compared with Example 3, the difference is that no hyperbranched polyester H20 is added in Comparative Example 1, and the other operating steps and parameters are the same.

[0057] Comparative Example 2

[0058] Compared with Example 3, the difference is that in Comparative Example 2, phthalic anhydride is not added to introduce ester groups, and the remaining operating steps and parameters are the same.

[0059] Comparative Examples 3-4

[0060] Compared with Example 3, the difference is that the weight parts of hydroxypropyltrimethylammonium chloride chitosan and dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride in Comparative Example 3-4 are as shown in Table 1, and the other operating steps and parameters are the same.

[0061] Table 1

[0062]

[0063] Performance Testing

[0064] (1) Antistatic test: According to the standard GB / T 12703.2-2009, the charge surface density of the antibacterial and antistatic fabrics prepared in Examples 1-3 and Comparative Examples 1-2 was measured to characterize the antistatic effect. The smaller the charge surface density, the better the antistatic effect. The results are shown in Table 2.

[0065] (2) Antibacterial performance test: According to the standard ISO 20743-2007, the antibacterial rate test was performed on the antibacterial and antistatic fabrics prepared in Examples 1-3 and Comparative Examples 3-4 to characterize the antibacterial performance. The results are shown in Table 2.

[0066] Table 2

[0067] <![CDATA[Surface charge density (μC / m 2 )]]> Antibacterial rate (%) Example 1 0.53 99.8 Example 2 0.50 99.7 Example 3 0.45 99.8 Comparative Example 1 5.49 —— Comparative Example 2 4.91 —— Comparative Example 3 —— 84.3 Comparative Example 4 —— 78.9

[0068] From the data of Examples 1-3 and Comparative Examples 1-2 in Table 2, it can be seen that the fabrics prepared by the present invention have excellent antistatic effects. This is because the present invention forms a post-treatment liquid with a hyperbranched structure, which is used in the process of preparing fabrics to effectively form an electrostatic shielding layer on the surface of the fabric, so that the charge on the surface of the fabric is quickly dissipated, thereby weakening the electrostatic effect and achieving an excellent antistatic effect; in addition, it can be seen from Comparative Example 1 that if less hyperbranched polyester H20 is added, it is not conducive to the contact between the post-treatment liquid and the fabric; if less phthalic anhydride is added, it is not conducive to the compatibility of the post-treatment liquid and the fabric; the result is that both will eventually affect the antistatic performance of the prepared fabric, so the raw materials and their proportions selected by the present invention are reasonable.

[0069] From the data of Examples 1-3 and Comparative Examples 3-4 in Table 2, it can be seen that the fabric prepared by the present invention has an excellent antibacterial effect. This is because the hydroxypropyl trimethyl ammonium chloride chitosan absorbs the negative charge on the surface of the microorganism through its positive charge, diffuses or penetrates the cell membrane, allows the macromolecular chain to enter the cell wall, and then destroys the cell membrane to release microbial cytoplasmic substances, resulting in bacterial inactivation; and dimethyl octadecyl [3- (trimethoxysilyl) propyl] ammonium chloride, with its silicon chain molecule growth effect, enhances the permeability on the surface of the fabric, can penetrate deeper into the surface of the fabric, assists hydroxypropyl trimethyl ammonium chloride chitosan to destroy the cell membrane, and further causes bacterial death, that is, the two work together to make the prepared fabric have excellent antibacterial properties.

[0070] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A preparation process of antibacterial and antistatic fabric, characterized in that: The preparation process comprises the following steps: S10, prepare post-treatment solution for standby use: S20, mixing the fabric and the post-treatment liquid, and treating them to obtain the antibacterial and antistatic fabric; Wherein, the step S10 is specifically as follows: S11, controlling the temperature to mix triethanolamine and deionized water uniformly, adding benzyl chloride dropwise, and controlling the temperature to react after the addition is completed to obtain intermediate material A for standby use; S12, the hyperbranched polyester H20 and dimethylformamide are mixed and stirred, sodium hydroxide is added and stirred again, after the stirring is completed, epichlorohydrin is added dropwise and nitrogen is introduced to control the temperature to react, after the reaction is completed, the pressure is reduced and the solid is removed by suction filtration to obtain an intermediate material B for standby use; S13, controlling the temperature of the intermediate material A, the intermediate material B, phthalic anhydride and dimethylformamide, mixing and reacting, and then adding hydroxypropyltrimethylammonium chloride chitosan and dimethyloctadecyl [3-(trimethoxysilyl)propyl] ammonium chloride and mixing to obtain a post-treatment liquid; In step S11, the triethanolamine is 27-30 parts by weight, the deionized water is 10-14 parts by weight, and the benzyl chloride is 33-36 parts by weight; In step S12, the hyperbranched polyester H20 is 1-1.5 parts by weight, dimethylformamide is 50-55 parts by weight, sodium hydroxide is 7-8 parts by weight, and epichlorohydrin is 16-17 parts by weight; In step S13, the phthalic anhydride is 8-11 parts by weight, the dimethylformamide is 60-80 parts by weight, the hydroxypropyltrimethylammonium chloride chitosan is 25-34 parts by weight, and the dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride is 20-28 parts by weight.

2. The preparation process of the antibacterial and antistatic fabric according to claim 1, characterized in that: The temperature of the temperature-controlled mixing in step S11 is 60-75° C.; the benzyl chloride is added dropwise while stirring; the temperature of the temperature-controlled reaction is 90-105° C., and the reaction time is 4-6 hours.

3. The preparation process of the antibacterial and antistatic fabric according to claim 1, characterized in that: The mixing and stirring time in step S12 is 15-30 minutes; the stirring time is 3-5 minutes; the epichlorohydrin is added dropwise; the temperature of the nitrogen-controlled reaction is 50-55°C, and the reaction time is 12-14 hours.

4. The preparation process of the antibacterial and antistatic fabric according to claim 1, characterized in that: The temperature of the temperature-controlled mixing reaction in step S13 is 100-110° C., and the reaction time is 2-3 hours; the mixing and stirring time is 0.5-1 hour.

5. The preparation process of the antibacterial and antistatic fabric according to claim 1, characterized in that: The step S20 is specifically as follows: The fabric is immersed in the post-treatment liquid at a first bath ratio under controlled temperature, followed by temperature and pressure padding treatment, temperature-controlled drying after the treatment, and after drying, immersed in water at a second bath ratio for heat preservation, taken out, and rolled out, and the fabric is taken out and dried to obtain the antibacterial and antistatic fabric.

6. The preparation process of the antibacterial and antistatic fabric according to claim 5, characterized in that: The first bath ratio is 1:30-40g / mL; the immersion temperature of the temperature-controlled immersion is 40-50°C, and the immersion time is 50-70min; the temperature-controlled and pressure-controlled immersion and rolling treatment is specifically a temperature-controlled 85-95°C, a pressure-controlled 5-8MPa immersion and rolling treatment for 4-6min; the temperature of the temperature-controlled drying is 40-55°C, and the time is 10-15min; the second bath ratio is 1:25-30g / mL; the insulation temperature is 65-75°C, and the insulation time is 30-45min; the rolling rate of the removal and rolling liquid is 70-80%; the drying temperature is 90-105°C, and the time is 12-14h.

7. An antibacterial and antistatic fabric obtained by the preparation process of the antibacterial and antistatic fabric as described in any one of claims 1 to 6.

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