Medical antibacterial bedding fabric and preparation process thereof

Abstract

The invention relates to the technical field of antibacterial fabrics, in particular to a medical antibacterial bedding fabric and a preparation process thereof; in order to improve the water absorption performance and air permeability of polyester fiber fabrics, the invention adds mesoporous nano-silica as a reinforcing material in the raw materials for preparing polyester fiber and performs a modification treatment on the raw materials; the invention first performs a carboxylation treatment on the mesoporous nano-silica, and further reacts with 3-aminophthalimide, thereby retaining an imine group on the surface of the mesoporous nano-silica; and then the invention further performs a chlorination treatment on the imine group to generate a halamine group with antibacterial activity; and the mesoporous nano-silica has a highly porous structure and a relatively large specific surface area, and can adsorb surrounding water vapor, thereby increasing the water absorption performance and air permeability of the polyester fiber and improving comfort.

Description

Technical Field

[0001] The invention relates to the technical field of antibacterial fabrics, in particular to a medical antibacterial bedding fabric and a preparation process thereof. Background Art

[0002] With the continuous advancement of science and technology and the improvement of people's living standards, people have shown a new pursuit for comfortable fabrics with antibacterial properties; in the field of medical antibacterial fabrics, polyester fiber fabrics have excellent mechanical properties and wrinkle resistance, and occupy a large proportion of medical antibacterial bedding fabrics. However, polyester fibers themselves have fewer polar groups, weaker water absorption and poorer body feel. Therefore, it is necessary to improve these defects of polyester fabrics and enhance their antibacterial properties to meet people's needs. Summary of the invention

[0003] The object of the present invention is to provide a medical antibacterial bedding fabric and a preparation process thereof to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a preparation process of medical antibacterial bedding fabrics, comprising the following steps:

[0005] S1. Preparation of antibacterial mesoporous nano-silica;

[0006] S11. Disperse mesoporous nano-silica in DMF, disperse by ultrasonic oscillation for 1.5-3h, add γ-aminopropyltriethoxysilane, heat to 45-55°C, stir to react for 3-6h, centrifuge to separate the precipitate, wash with anhydrous ethanol and tetrahydrofuran 2-3 times respectively, disperse the precipitate in pure tetrahydrofuran, disperse by ultrasonic oscillation for 2-4h, add 1,2,4-benzene trimellitic anhydride, heat to 35-45°C, stir to react for 2-8h, centrifuge to separate the precipitate, wash the precipitate with deionized water 2-5 times, and dry to constant weight to obtain carboxylated mesoporous nano-silica;

[0007] S12. 3-aminophthalimide is dispersed in DMF, heated to 45-60°C, stirred and mixed for 2-5 hours, dicyclohexylcarbodiimide is added thereto, and the stirring is continued for 15-30 minutes, and carboxylated mesoporous nano-silica is added thereto. The temperature is raised to 65-70°C under a nitrogen atmosphere, ultrasonically shaken for 2-4 hours, and the precipitate is separated by centrifugation. The precipitate is washed with DMAc for 3-4 times, and then vacuum evaporated to constant weight to obtain imidized mesoporous nano-silica;

[0008] S13. Disperse the imidized mesoporous nano-silica in deionized water, ultrasonically disperse for 45-70 minutes, add sodium hydroxide, react at room temperature for 1-2 hours, centrifuge and separate the precipitate, ultrasonically disperse the precipitate again in deionized water for 0.5-1 hour, add sodium hypochlorite, stir and react for 2-6 hours, continuously add dilute hydrochloric acid during the reaction to control the pH value at 7-8, after the reaction is completed, centrifuge and separate the precipitate, wash with deionized water 2-3 times, and evaporate in vacuum to constant weight to obtain antibacterial mesoporous nano-silica;

[0009] S2. After PBT, polydimethylsiloxane and an anti-ultraviolet agent are melt-mixed, antibacterial mesoporous nano-silica is added thereto, and the antibacterial polyester fiber is obtained by extrusion molding by a screw extruder;

[0010] S3. The antibacterial polyester fiber prepared in step S2 is cooled, oiled, stretched and shaped to obtain antibacterial polyester filament;

[0011] S4. The antibacterial polyester filaments are spun to prepare medical antibacterial bedding fabrics.

[0012] Furthermore, in step S11, the mass ratio of the mesoporous nano-silica, γ-aminopropyltriethoxysilane, and 1,2,4-trimethylbenzene anhydride is 10:(5-15):(5-30) in parts by weight.

[0013] Furthermore, in terms of weight, in step S12, the mass ratio of 3-aminophthalimide, dicyclohexylcarbodiimide, and carboxylated mesoporous nano-silica is (5-15): (0.01-0.1):10.

[0014] Furthermore, in terms of weight, in step S13, the mass ratio of the imidized mesoporous nano-silica, sodium hydroxide, and sodium hypochlorite is 10:(5-15):(3-18).

[0015] Furthermore, in step S2, the antibacterial polyester fiber is composed of 80-90 parts of PBT, 0.8-2 parts of polydimethylsiloxane, 0.5-1 parts of anti-ultraviolet agent, and 5-10 parts of antibacterial mesoporous nano-silica, by weight.

[0016] Furthermore, the anti-ultraviolet agent is 2-(2-hydroxy-5-methylphenyl)benzotriazole.

[0017] Furthermore, the medical antibacterial bedding fabric has a gram weight of 120-190 g / m 2 .

[0018] Furthermore, a medical antibacterial bedding fabric is prepared using the above preparation process.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0020] 1. In order to improve the water absorption and air permeability of polyester fiber fabrics, the present invention adds mesoporous nano-silica as a reinforcing material in the raw materials for preparing polyester fibers; mesoporous nano-silica has a highly porous structure, and these porous structures have a relatively large specific surface area, which can adsorb surrounding water vapor, thereby increasing the water absorption of polyester fibers, and the introduction of the mesoporous structure also forms tiny channels for gas molecules to pass through, thereby increasing the air permeability of polyester fiber fabrics and improving comfort;

[0021] 2. In order to improve the antibacterial properties of polyester fabrics, the present invention also performs a halogenated amination modification treatment on mesoporous nano-silica; the present invention first performs a carboxylation treatment on the mesoporous nano-silica. In this process, more polar groups are introduced on the surface of the mesoporous nano-silica, which can effectively increase the adsorption capacity of the mesoporous nano-silica for water molecules and improve the water absorption; then the present invention uses 3-aminophthalimide to further modify the mesoporous nano-silica material, and by controlling the reaction conditions, while retaining the imine group, the amino group in the 3-aminophthalimide reacts with the carboxyl group on the surface of the mesoporous nano-silica, thereby introducing the imine group on the surface of the mesoporous nano-silica. On this basis, the present invention further performs a chlorination treatment on the imine group to generate a halogenated amination group with antibacterial activity;

[0022] After sterilization, the halogenamine group usually returns to a precursor with amine, amide, or imide. The fabric prepared by the present invention is a medical fabric. Chlorine-containing disinfectants such as sodium hypochlorite are often used in the cleaning process of medical cotton materials. Therefore, during the cleaning process, the fabric prepared by the present invention is often exposed to Cl - , thereby regenerating the halogenamine structure and maintaining the antibacterial properties for a long time. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0024] The mesoporous nano-silica used in this application is XFF43 104015 mesoporous nano-silica produced by Jiangsu Xianfeng Nanomaterial Technology Co., Ltd.; the γ-aminopropyltriethoxysilane and 1,2,4-trimethic anhydride used are provided by Shanghai Aladdin Biochemical Technology Co., Ltd.; the 3-aminophthalimide used is provided by Hubei Jianchu Biomedicine Co., Ltd.; the PBT used is Nanya brand 1100 PBT; the nano-silica used is VK-SP30S nano-silica provided by Xuancheng Jingrui New Materials Co., Ltd.;

[0025] Example 1. A preparation process of medical antibacterial bedding fabric, comprising the following steps:

[0026] S1. Preparation of antibacterial mesoporous nano-silica;

[0027] S11. According to the weight ratio, 10 parts of mesoporous nano-silica were dispersed in 150 parts of DMF, and after ultrasonic vibration dispersion for 1.5 hours, 5 parts of γ-aminopropyltriethoxysilane were added, the temperature was raised to 45°C, and the reaction was stirred for 3 hours, and the precipitate was separated by centrifugation. After washing with anhydrous ethanol and tetrahydrofuran twice, the precipitate was dispersed in 150 parts of pure tetrahydrofuran, and ultrasonic vibration dispersion was performed for 2 hours. 5 parts of 1,2,4-benzene trimellitic anhydride were added thereto, the temperature was raised to 35°C, and the reaction was stirred for 2 hours. The precipitate was separated by centrifugation, and the precipitate was washed with deionized water twice, and then vacuum dried at 60°C to constant weight to obtain carboxylated mesoporous nano-silica;

[0028] S12. Disperse 5 parts of 3-aminophthalimide in 100 parts of DMF by weight, heat to 45°C, stir and mix for 2-5 hours, add 0.01 parts of dicyclohexylcarbodiimide, continue to stir and mix for 15 minutes, add 10 parts of carboxylated mesoporous nano-silica, heat to 65°C under nitrogen atmosphere, ultrasonically shake for 2 hours, centrifuge and precipitate, wash the precipitate with DMAc 3 times, and evaporate in vacuum to constant weight to obtain imidized mesoporous nano-silica;

[0029] S13. Disperse 10 parts of imidized mesoporous nano-silica into 100 parts of deionized water, ultrasonically disperse for 45 minutes, add 5 parts of sodium hydroxide, react at room temperature for 1 hour, centrifuge and separate the precipitate, ultrasonically disperse the precipitate again with 100 parts of deionized water for 0.5 hours, add 3 parts of sodium hypochlorite, stir and react for 2 hours, continuously add dilute hydrochloric acid during the reaction process, control the pH value at 7-8, after the reaction is completed, centrifuge and separate the precipitate, wash it with deionized water twice, and evaporate it to constant weight at 80°C in vacuum to obtain antibacterial mesoporous nano-silica;

[0030] S2. After 80 parts of PBT, 0.8 parts of polydimethylsiloxane and 0.5 parts of an anti-ultraviolet agent were melt-mixed by weight, 5 parts of antibacterial mesoporous nano-silica were added thereto, and the antibacterial polyester fiber was obtained by extrusion molding at 270°C using a screw extruder;

[0031] S3. The antibacterial polyester fiber prepared in step S2 is cooled, oiled, stretched and shaped to obtain antibacterial polyester filament;

[0032] S4. The antibacterial polyester filament is spun to prepare a 135 g / m 2 32S polyester plain weave medical antibacterial bedding fabric.

[0033] Example 2. A preparation process for medical antibacterial bedding fabric, comprising the following steps:

[0034] Compared with Example 1, this example increases the amount of antibacterial mesoporous nano-silica added in step S2;

[0035] S1. Preparation of antibacterial mesoporous nano-silica;

[0036] S11. According to the weight ratio, 10 parts of mesoporous nano-silica were dispersed in 150 parts of DMF, and after ultrasonic vibration dispersion for 1.5 hours, 5 parts of γ-aminopropyltriethoxysilane were added, the temperature was raised to 45°C, and the reaction was stirred for 3 hours, and the precipitate was separated by centrifugation. After washing with anhydrous ethanol and tetrahydrofuran twice, the precipitate was dispersed in 150 parts of pure tetrahydrofuran, and ultrasonic vibration dispersion was performed for 2 hours. 5 parts of 1,2,4-benzene trimellitic anhydride were added thereto, the temperature was raised to 35°C, and the reaction was stirred for 2 hours. The precipitate was separated by centrifugation, and the precipitate was washed with deionized water twice, and then vacuum dried at 60°C to constant weight to obtain carboxylated mesoporous nano-silica;

[0037] S12. Disperse 5 parts of 3-aminophthalimide in 100 parts of DMF by weight, heat to 45°C, stir and mix for 2-5 hours, add 0.01 parts of dicyclohexylcarbodiimide, continue to stir and mix for 15 minutes, add 10 parts of carboxylated mesoporous nano-silica, heat to 65°C under nitrogen atmosphere, ultrasonically shake for 2 hours, centrifuge and precipitate, wash the precipitate with DMAc 3 times, and evaporate in vacuum to constant weight to obtain imidized mesoporous nano-silica;

[0038] S13. Disperse 10 parts of imidized mesoporous nano-silica into 100 parts of deionized water, ultrasonically disperse for 45 minutes, add 5 parts of sodium hydroxide, react at room temperature for 1 hour, centrifuge and separate the precipitate, ultrasonically disperse the precipitate again with 100 parts of deionized water for 0.5 hours, add 3 parts of sodium hypochlorite, stir and react for 2 hours, continuously add dilute hydrochloric acid during the reaction process, control the pH value at 7-8, after the reaction is completed, centrifuge and separate the precipitate, wash it with deionized water twice, and evaporate it to constant weight at 80°C in vacuum to obtain antibacterial mesoporous nano-silica;

[0039] S2. After 80 parts of PBT, 0.8 parts of polydimethylsiloxane and 0.5 parts of an anti-ultraviolet agent were melt-mixed by weight, 10 parts of antibacterial mesoporous nano-silica were added thereto, and the antibacterial polyester fiber was obtained by extrusion molding at 270°C by a screw extruder;

[0040] S3. The antibacterial polyester fiber prepared in step S2 is cooled, oiled, stretched and shaped to obtain antibacterial polyester filament;

[0041] S4. The antibacterial polyester filament is spun to prepare a 135 g / m 2 32S polyester plain weave medical antibacterial bedding fabric.

[0042] Example 3. A preparation process for medical antibacterial bedding fabric, comprising the following steps:

[0043] Compared with Example 2, this example increases the amount of 3-aminophthalimide added in step S12;

[0044] S1. Preparation of antibacterial mesoporous nano-silica;

[0045] S11. According to the weight ratio, 10 parts of mesoporous nano-silica were dispersed in 150 parts of DMF, and after ultrasonic vibration dispersion for 1.5 hours, 5 parts of γ-aminopropyltriethoxysilane were added, the temperature was raised to 45°C, and the reaction was stirred for 3 hours, and the precipitate was separated by centrifugation. After washing with anhydrous ethanol and tetrahydrofuran twice, the precipitate was dispersed in 150 parts of pure tetrahydrofuran, and ultrasonic vibration dispersion was performed for 2 hours. 5 parts of 1,2,4-benzene trimellitic anhydride were added thereto, the temperature was raised to 35°C, and the reaction was stirred for 2 hours. The precipitate was separated by centrifugation, and the precipitate was washed with deionized water twice, and then vacuum dried at 60°C to constant weight to obtain carboxylated mesoporous nano-silica;

[0046] S12. Disperse 15 parts of 3-aminophthalimide in 100 parts of DMF by weight, heat to 45°C, stir and mix for 2-5 hours, add 0.01 parts of dicyclohexylcarbodiimide, continue to stir and mix for 15 minutes, add 10 parts of carboxylated mesoporous nano-silica, heat to 65°C under nitrogen atmosphere, ultrasonically shake for 2 hours, centrifuge and precipitate, wash the precipitate with DMAc 3 times, and evaporate in vacuum to constant weight to obtain imidized mesoporous nano-silica;

[0047] S13. Disperse 10 parts of imidized mesoporous nano-silica into 100 parts of deionized water, ultrasonically disperse for 45 minutes, add 5 parts of sodium hydroxide, react at room temperature for 1 hour, centrifuge and separate the precipitate, ultrasonically disperse the precipitate again with 100 parts of deionized water for 0.5 hours, add 3 parts of sodium hypochlorite, stir and react for 2 hours, continuously add dilute hydrochloric acid during the reaction process, control the pH value at 7-8, after the reaction is completed, centrifuge and separate the precipitate, wash it with deionized water twice, and evaporate it to constant weight at 80°C in vacuum to obtain antibacterial mesoporous nano-silica;

[0048] S2. After 80 parts of PBT, 0.8 parts of polydimethylsiloxane and 0.5 parts of an anti-ultraviolet agent were melt-mixed by weight, 10 parts of antibacterial mesoporous nano-silica were added thereto, and the antibacterial polyester fiber was obtained by extrusion molding at 270°C by a screw extruder;

[0049] S3. The antibacterial polyester fiber prepared in step S2 is cooled, oiled, stretched and shaped to obtain antibacterial polyester filament;

[0050] S4. The antibacterial polyester filament is spun to prepare a 135 g / m 2 32S polyester plain weave medical antibacterial bedding fabric.

[0051] Example 4. A preparation process for medical antibacterial bedding fabric, comprising the following steps:

[0052] Compared with Example 2, this embodiment increases the amount of sodium hypochlorite added in step S13;

[0053] S1. Preparation of antibacterial mesoporous nano-silica;

[0054] S11. According to the weight ratio, 10 parts of mesoporous nano-silica were dispersed in 150 parts of DMF, and after ultrasonic vibration dispersion for 1.5 hours, 5 parts of γ-aminopropyltriethoxysilane were added, the temperature was raised to 45°C, and the reaction was stirred for 3 hours, and the precipitate was separated by centrifugation. After washing with anhydrous ethanol and tetrahydrofuran twice, the precipitate was dispersed in 150 parts of pure tetrahydrofuran, and ultrasonic vibration dispersion was performed for 2 hours. 5 parts of 1,2,4-benzene trimellitic anhydride were added thereto, the temperature was raised to 35°C, and the reaction was stirred for 2 hours. The precipitate was separated by centrifugation, and the precipitate was washed with deionized water twice, and then vacuum dried at 60°C to constant weight to obtain carboxylated mesoporous nano-silica;

[0055] S12. Disperse 5 parts of 3-aminophthalimide in 100 parts of DMF by weight, heat to 45°C, stir and mix for 2-5 hours, add 0.01 parts of dicyclohexylcarbodiimide, continue to stir and mix for 15 minutes, add 10 parts of carboxylated mesoporous nano-silica, heat to 65°C under nitrogen atmosphere, ultrasonically shake for 2 hours, centrifuge and precipitate, wash the precipitate with DMAc 3 times, and evaporate in vacuum to constant weight to obtain imidized mesoporous nano-silica;

[0056] S13. Disperse 10 parts of imidized mesoporous nano-silica into 100 parts of deionized water, ultrasonically disperse for 45 minutes, add 5 parts of sodium hydroxide, react at room temperature for 1 hour, centrifuge and separate the precipitate, ultrasonically disperse the precipitate again with 100 parts of deionized water for 0.5 hours, add 18 parts of sodium hypochlorite, stir and react for 2 hours, continuously add dilute hydrochloric acid during the reaction process, control the pH value at 7-8, after the reaction is completed, centrifuge and separate the precipitate, wash it with deionized water twice, and evaporate it to constant weight at 80°C in vacuum to obtain antibacterial mesoporous nano-silica;

[0057] S2. After 80 parts of PBT, 0.8 parts of polydimethylsiloxane and 0.5 parts of an anti-ultraviolet agent were melt-mixed by weight, 10 parts of antibacterial mesoporous nano-silica were added thereto, and the antibacterial polyester fiber was obtained by extrusion molding at 270°C by a screw extruder;

[0058] S3. The antibacterial polyester fiber prepared in step S2 is cooled, oiled, stretched and shaped to obtain antibacterial polyester filament;

[0059] S4. The antibacterial polyester filament is spun to prepare a 135 g / m 2 32S polyester plain weave medical antibacterial bedding fabric.

[0060] Example 5. A preparation process for medical antibacterial bedding fabric, comprising the following steps:

[0061] Compared with Example 2, this example increases the amount of trimellitic anhydride added in step S11;

[0062] S1. Preparation of antibacterial mesoporous nano-silica;

[0063] S11. According to the weight ratio, 10 parts of mesoporous nano-silica were dispersed in 150 parts of DMF, and after ultrasonic vibration dispersion for 1.5 hours, 5 parts of γ-aminopropyltriethoxysilane were added, the temperature was raised to 45°C, and the reaction was stirred for 3 hours, and the precipitate was separated by centrifugation. After washing with anhydrous ethanol and tetrahydrofuran twice, the precipitate was dispersed in 150 parts of pure tetrahydrofuran, and ultrasonic vibration dispersion was performed for 2 hours. Then, 30 parts of 1,2,4-benzene trimellitic anhydride were added thereto, the temperature was raised to 35°C, and the reaction was stirred for 2 hours. The precipitate was separated by centrifugation, and the precipitate was washed with deionized water twice, and then vacuum dried at 60°C to constant weight to obtain carboxylated mesoporous nano-silica;

[0064] S12. Disperse 5 parts of 3-aminophthalimide in 100 parts of DMF by weight, heat to 45°C, stir and mix for 2-5 hours, add 0.01 parts of dicyclohexylcarbodiimide, continue to stir and mix for 15 minutes, add 10 parts of carboxylated mesoporous nano-silica, heat to 65°C under nitrogen atmosphere, ultrasonically shake for 2 hours, centrifuge and precipitate, wash the precipitate with DMAc 3 times, and evaporate in vacuum to constant weight to obtain imidized mesoporous nano-silica;

[0065] S13. Disperse 10 parts of imidized mesoporous nano-silica into 100 parts of deionized water, ultrasonically disperse for 45 minutes, add 5 parts of sodium hydroxide, react at room temperature for 1 hour, centrifuge and separate the precipitate, ultrasonically disperse the precipitate again with 100 parts of deionized water for 0.5 hours, add 3 parts of sodium hypochlorite, stir and react for 2 hours, continuously add dilute hydrochloric acid during the reaction process, control the pH value at 7-8, after the reaction is completed, centrifuge and separate the precipitate, wash it with deionized water twice, and evaporate it to constant weight at 80°C in vacuum to obtain antibacterial mesoporous nano-silica;

[0066] S2. After 80 parts of PBT, 0.8 parts of polydimethylsiloxane and 0.5 parts of an anti-ultraviolet agent were melt-mixed by weight, 10 parts of antibacterial mesoporous nano-silica were added thereto, and the antibacterial polyester fiber was obtained by extrusion molding at 270°C by a screw extruder;

[0067] S3. The antibacterial polyester fiber prepared in step S2 is cooled, oiled, stretched and shaped to obtain antibacterial polyester filament;

[0068] S4. The antibacterial polyester filament is spun to prepare a 135 g / m 2 32S polyester plain weave medical antibacterial bedding fabric.

[0069] Comparative Example 1. A preparation process for medical antibacterial bedding fabric, comprising the following steps:

[0070] Compared with Example 2, this comparative example did not prepare antibacterial mesoporous nano-silica;

[0071] S1. After 80 parts of PBT, 0.8 parts of polydimethylsiloxane and 0.5 parts of an anti-ultraviolet agent were melt-mixed by weight, 10 parts of mesoporous nano-silica were added thereto, and the mixture was extruded by a screw extruder at 270°C to obtain an antibacterial polyester fiber;

[0072] S2. The antibacterial polyester fiber prepared in step S1 is cooled, oiled, stretched and shaped to obtain antibacterial polyester filament;

[0073] S3. The antibacterial polyester filament is spun to prepare a 135 g / m 2 32S polyester plain weave medical antibacterial bedding fabric.

[0074] Comparative Example 2. A preparation process for medical antibacterial bedding fabric, comprising the following steps:

[0075] Compared with Example 1, this comparative example uses nano-silica instead of mesoporous nano-silica.

[0076] Compared with Example 2, this comparative example increases the amount of trimellitic anhydride added in step S11;

[0077] S1. Preparation of antibacterial nano-silica;

[0078] S11. Disperse 10 parts of nano-silica in 150 parts of DMF by weight, disperse under ultrasonic vibration for 1.5 hours, add 5 parts of γ-aminopropyltriethoxysilane, heat to 45°C, stir to react for 3 hours, centrifuge to separate the precipitate, wash twice with anhydrous ethanol and tetrahydrofuran respectively, disperse the precipitate in 150 parts of pure tetrahydrofuran, disperse under ultrasonic vibration for 2 hours, add 5 parts of 1,2,4-benzene trimellitic anhydride, heat to 35°C, stir to react for 2 hours, centrifuge to separate the precipitate, wash the precipitate twice with deionized water, and dry it at 60°C in vacuum to constant weight to obtain carboxylated nano-silica;

[0079] S12. Disperse 5 parts of 3-aminophthalimide in 100 parts of DMF by weight, heat to 45°C, stir and mix for 2-5h, add 0.01 parts of dicyclohexylcarbodiimide, continue to stir and mix for 15min, add 10 parts of carboxylated nano-silica, heat to 65°C under nitrogen atmosphere, ultrasonically shake and react for 2h, centrifuge and precipitate, wash the precipitate 3 times with DMAc, and evaporate in vacuum to constant weight to obtain imidized nano-silica;

[0080] S13. Disperse 10 parts of imidized nano-silica into 100 parts of deionized water, ultrasonically disperse for 45 minutes, add 5 parts of sodium hydroxide, react at room temperature for 1 hour, centrifuge and separate the precipitate, ultrasonically disperse the precipitate again with 100 parts of deionized water for 0.5 hours, add 3 parts of sodium hypochlorite, stir and react for 2 hours, continuously add dilute hydrochloric acid during the reaction process, control the pH value at 7-8, after the reaction is completed, centrifuge and separate the precipitate, wash it with deionized water twice, and evaporate it to constant weight at 80°C in vacuum to obtain antibacterial nano-silica;

[0081] S2. After 80 parts of PBT, 0.8 parts of polydimethylsiloxane and 0.5 parts of an anti-ultraviolet agent were melt-mixed by weight, 10 parts of antibacterial nano-silica were added thereto, and the antibacterial polyester fiber was obtained by extrusion molding at 270°C by a screw extruder;

[0082] S3. The antibacterial polyester fiber prepared in step S2 is cooled, oiled, stretched and shaped to obtain antibacterial polyester filament;

[0083] S4. The antibacterial polyester filament is spun to prepare a 135 g / m 2 32S polyester plain weave medical antibacterial bedding fabric.

[0084] Testing: According to GB / T 21665.1-2008, the fabrics prepared in Examples 1-5 and Comparative Examples 1-2 were tested for drip diffusion time and wicking height. According to GB 15979-2002, the fabrics prepared in Examples 1-5 and Comparative Examples 1-2 were tested for their anti-Escherichia coli and Staphylococcus aureus performance using the film culture method. The test results are shown in the table below.

[0085]

[0086] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A preparation process for medical antibacterial bedding fabric, characterized in that: The following steps are involved: S1. Preparation of antibacterial mesoporous nano-silica; S11. Disperse mesoporous nano-silica in DMF, disperse by ultrasonic oscillation for 1.5-3h, add γ-aminopropyltriethoxysilane, heat to 45-55°C, stir to react for 3-6h, centrifuge to separate the precipitate, wash with anhydrous ethanol and tetrahydrofuran 2-3 times respectively, disperse the precipitate in pure tetrahydrofuran, disperse by ultrasonic oscillation for 2-4h, add 1,2,4-benzene trimellitic anhydride, heat to 35-45°C, stir to react for 2-8h, centrifuge to separate the precipitate, wash the precipitate with deionized water 2-5 times, and dry to constant weight to obtain carboxylated mesoporous nano-silica; S12. 3-aminophthalimide is dispersed in DMF, heated to 45-60°C, stirred and mixed for 2-5 hours, dicyclohexylcarbodiimide is added thereto, and the stirring is continued for 15-30 minutes, and carboxylated mesoporous nano-silica is added thereto. The temperature is raised to 65-70°C under a nitrogen atmosphere, ultrasonically shaken for 2-4 hours, and the precipitate is separated by centrifugation. The precipitate is washed with DMAc for 3-4 times, and then vacuum evaporated to constant weight to obtain imidized mesoporous nano-silica; S13. Disperse the imidized mesoporous nano-silica in deionized water, ultrasonically disperse for 45-70 minutes, add sodium hydroxide, react at room temperature for 1-2 hours, centrifuge and separate the precipitate, ultrasonically disperse the precipitate again in deionized water for 0.5-1 hour, add sodium hypochlorite, stir and react for 2-6 hours, continuously add dilute hydrochloric acid during the reaction to control the pH value at 7-8, after the reaction is completed, centrifuge and separate the precipitate, wash with deionized water 2-3 times, and evaporate in vacuum to constant weight to obtain antibacterial mesoporous nano-silica; S2. After PBT, polydimethylsiloxane and an anti-ultraviolet agent are melt-mixed, antibacterial mesoporous nano-silica is added thereto, and the antibacterial polyester fiber is obtained by extrusion molding by a screw extruder; S3. The antibacterial polyester fiber prepared in step S2 is cooled, oiled, stretched and shaped to obtain antibacterial polyester filament; S4. The antibacterial polyester filaments are spun to prepare medical antibacterial bedding fabrics.

2. The preparation process of a medical antibacterial bedding fabric according to claim 1, characterized in that: In terms of weight, in step S11, the mass ratio of the mesoporous nano-silica, γ-aminopropyltriethoxysilane, and 1,2,4-trimethic anhydride is 10:(5-15):(5-30).

3. The preparation process of a medical antibacterial bedding fabric according to claim 1, characterized in that: In terms of weight, in step S12, the mass ratio of 3-aminophthalimide, dicyclohexylcarbodiimide, and carboxylated mesoporous nano-silica is (5-15): (0.01-0.1):

10.

4. The preparation process of a medical antibacterial bedding fabric according to claim 1, characterized in that: In terms of weight, in step S13, the mass ratio of the imidized mesoporous nano-silica, sodium hydroxide and sodium hypochlorite is 10: (5-15): (3-18).

5. The preparation process of the medical antibacterial bedding fabric according to claim 1, characterized in that: In terms of weight, in step S2, the antibacterial polyester fiber is prepared from 80-90 parts of PBT, 0.8-2 parts of polydimethylsiloxane, 0.5-1 parts of anti-ultraviolet agent, and 5-10 parts of antibacterial mesoporous nano-silica.

6. The preparation process of the medical antibacterial bedding fabric according to claim 1, characterized in that: The anti-ultraviolet agent is 2-(2-hydroxy-5-methylphenyl)benzotriazole.

7. The preparation process of the medical antibacterial bedding fabric according to claim 1, characterized in that: The medical antibacterial bedding fabric has a grammage of 120-190 g / m 2 .

8. A medical antibacterial bedding fabric prepared by the preparation process according to any one of claims 1 to 7.

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