An antibacterial modified fiber-reinforced reusable medical surgical drape and a method for preparing the same
By combining synergistic chemical modification of the fiber matrix with organic small molecule antibacterial regulators, the problem of unstable antibacterial performance of reusable medical surgical towels has been solved, achieving stable antibacterial effect after multiple washings and disinfections, thus extending the service life of medical surgical towels.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU LIKANG GROUP CORP
- Filing Date
- 2026-01-14
- Publication Date
- 2026-06-02
AI Technical Summary
The antibacterial properties of existing reusable medical surgical towels are difficult to maintain after repeated washing and disinfection. Traditional antibacterial agents are prone to loss and pose safety risks, and the material structure lacks stability.
By synergistically chemically modifying the fiber matrix, a reactive functional layer is constructed on the fiber surface. Organic small molecule antibacterial regulators are introduced, and hydrophilicity regulators, cross-linking stabilizers, anti-aging agents, and film-forming structure stabilizers are added to form a medical surgical towel material system with long-lasting antibacterial properties.
It maintains stable antibacterial properties under repeated washing and disinfection conditions, extending the service life of medical surgical towels and avoiding the problem of easy failure of traditional antibacterial systems.
Smart Images
Figure CN122128905A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical textile materials technology, specifically to a reusable medical surgical towel reinforced with antibacterial modified fibers and its preparation method. Background Technology
[0002] Surgical drapes are essential medical consumables used during surgery to cover the surgical area, isolate contaminants, and absorb bodily fluids. Their performance directly affects the aseptic safety of the surgical environment and the reliability of medical procedures. With the improvement of medical standards and increasingly stringent requirements for the management of medical consumables, surgical drapes not only need to have good barrier and absorbency, but also need to maintain stable antibacterial and structural properties during repeated use.
[0003] Existing medical surgical drapes mainly include two categories: disposable medical surgical drapes and reusable medical surgical drapes. Disposable medical surgical drapes are mostly made of non-woven fabric, which, while offering good initial antibacterial properties, suffers from a short lifespan, generates a large amount of medical waste, and consumes significant resources, placing considerable pressure on medical institutions' cost control and environmental management. Reusable medical surgical drapes are typically made of cotton or synthetic fiber fabrics, possessing a certain level of mechanical strength and washability; however, their antibacterial properties largely depend on surface finishing or simple coating methods, making it difficult to maintain stability after repeated high-temperature washing and sterilization.
[0004] The commonly used antibacterial systems for medical textiles in the present technology are mainly based on silver ions, quaternary ammonium salt compounds or halogen-containing antibacterial agents. These antibacterial systems still have certain limitations in practical applications. For example, the antibacterial components are easily lost during repeated washing, resulting in a decrease in antibacterial effect; some antibacterial agents have potential biosafety risks or drug resistance risks; at the same time, the interaction between them and the fiber matrix is mostly physical adsorption or weak interaction, making it difficult to achieve long-term stable binding.
[0005] Therefore, how to achieve long-lasting and stable antibacterial function through material structure design and chemical modification while ensuring the reusability of medical surgical drapes, and avoid the safety and durability problems caused by traditional antibacterial systems, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0006] To overcome the technical challenges of poor antibacterial durability, easy loss of antibacterial components during repeated washing and disinfection, and insufficient material structural stability in reusable medical surgical towels mentioned above, the present invention aims to provide a reusable medical surgical towel reinforced with antibacterial modified fibers and its preparation method. The present invention involves synergistic chemical modification of the fiber matrix to construct a reactive functional layer on the fiber surface, and introducing an organic small-molecule antibacterial regulator not previously used in this field, ensuring its stable loading within the fiber structure. Simultaneously, hydrophilicity regulating, crosslinking stabilizing, anti-aging, and film-forming structure stabilizing agents are used to form a medical surgical towel material system with durable antibacterial properties. The present invention maintains stable antibacterial properties and improves the service life of the medical surgical towel even under repeated washing and disinfection conditions.
[0007] The objective of this invention can be achieved through the following technical solutions: A reusable medical surgical towel reinforced with antibacterial modified fibers is disclosed. The surgical towel is woven from an antibacterial functional fiber material comprising the following raw materials in parts by weight: 60-80 parts of a synergistic modified fiber reinforcing matrix; 0.5-5 parts of an organic small molecule antibacterial regulator; 2-8 parts of a hydrophilic regulator; 0.1-2 parts of a crosslinking stabilizer; 0.1-1 parts of an anti-aging agent; and 1-5 parts of a film-forming and structural stabilizing agent. The synergistic modified fiber reinforcing matrix is constructed by grafting maleic anhydride with carboxyl active sites under the action of an initiator, and further by silanizing the fiber surface with 3-aminopropyltriethoxysilane to construct a reactive functional layer containing carboxyl / amino groups on the fiber surface. The organic small molecule antibacterial regulator is 2,5-diaminobenzoic acid, which is loaded onto the fiber through intermolecular interactions and stabilization with the reactive functional layer, enabling the surgical towel to retain its durable antibacterial properties even after repeated washing and disinfection.
[0008] Optionally, the synergistically modified fiber-reinforced matrix comprises the following raw materials in parts by weight: 85-95 parts of polyethylene terephthalate fiber; 0.5-3.0 parts of maleic anhydride; 0.5-2.0 parts of 3-aminopropyltriethoxysilane; and 0.01-0.5 parts of di-tert-butyl peroxide.
[0009] Optionally, the preparation method of the synergistically modified fiber-reinforced matrix includes the following steps: (1) Dry the polyethylene terephthalate fiber to remove residual moisture, and then heat it to a molten or surface-activated state. (2) Maleic anhydride and di-tert-butyl peroxide were added to polyethylene terephthalate fiber and grafted under heating and stirring conditions to graft maleic anhydride onto the fiber molecular chain to obtain modified fiber containing carboxyl active sites. (3) Add 3-aminopropyltriethoxysilane to the modified fiber and carry out silanization reaction under heating conditions. After the reaction is completed, cool and dry to obtain the synergistic modified fiber reinforced matrix.
[0010] Optionally, the reaction conditions in step (1) are as follows: the polyethylene terephthalate fiber is dried at 80-120°C for 4-12 hours.
[0011] Optionally, the reaction conditions in step (2) are as follows: maleic anhydride and di-tert-butyl peroxide are added to polyethylene terephthalate fiber at 180-220°C for graft modification reaction, the reaction time is 5-30 minutes, and the reaction is carried out under a nitrogen protective atmosphere.
[0012] Optionally, the reaction conditions for step (3) are as follows: 3-aminopropyltriethoxysilane is added at 60-100°C for silanization reaction, the reaction time is 30-120 minutes, and the reaction medium is a mixture of ethanol and water.
[0013] Optionally, the hydrophilic modifier is a mixture of polyethylene glycol 400 and polyvinylpyrrolidone K30 in a mass ratio of (3-7):(7-3); the crosslinking stabilizer is a mixture of 1,2,3,4-butanetetracarboxylic acid and sodium hypophosphite in a mass ratio of (5-15):(1-3); the anti-aging agent is a mixture of hindered phenolic antioxidant 1010 and phosphite antioxidant 168 in a mass ratio of (1-4):(4-1); and the film-forming and structural stabilizing agent is a mixture of aqueous polyurethane dispersion and polyvinyl alcohol in a mass ratio of (6-9):(4-1).
[0014] Optionally, a method for preparing a reusable medical surgical drape reinforced with antibacterial modified fibers, the method comprising the following steps: S1, 2,5-Diaminobenzoic acid is introduced into the synergistically modified fiber reinforcement matrix, and through impregnation or mixing, it is made to interact with the reactive functional layer on the fiber surface and be stably bonded to obtain antibacterial functional fiber material. S2 involves treating antibacterial functional fiber materials with hydrophilic regulators, crosslinking stabilizers, anti-aging agents, and film-forming and structural stabilizing agents, then weaving them into medical surgical drapes, followed by drying and sterilization to obtain reusable medical surgical drapes reinforced with antibacterial modified fibers.
[0015] Optionally, the reaction conditions for step S2 are as follows: 2,5-diaminobenzoic acid is introduced into the synergistically modified fiber-reinforced matrix by impregnation at 20-60°C for 10-120 minutes, followed by dehydration and drying.
[0016] Optionally, the reaction conditions for step S3 are as follows: finishing and drying are carried out at 80–150°C for 5–30 minutes, followed by sterilization at 100–140°C for 10–60 minutes.
[0017] The beneficial effects of this invention are: This invention introduces a reactive functional layer formed by maleic anhydride graft structure and 3-aminopropyltriethoxysilane sequentially onto polyethylene terephthalate (PET) fibers. This simultaneously constructs a stable active interface on the fiber surface where carboxyl and amino groups coexist. This allows 2,5-diaminobenzoic acid to be firmly anchored within the fiber structure through multi-point hydrogen bonds and electrostatic interactions, significantly reducing the migration and loss of antibacterial organic molecules during high-temperature washing and repeated sterilization. Furthermore, the antibacterial function is provided synergistically within the fiber structure rather than through simple surface finishing, ensuring that the medical surgical towels maintain a stable and long-lasting antibacterial effect even after multiple uses, and avoiding the problem of traditional antibacterial finishing easily failing. Attached Figure Description
[0018] The invention will now be further described with reference to the accompanying drawings.
[0019] Figure 1 A comparison of the infrared spectra of polyethylene terephthalate fibers and synergistically modified fiber-reinforced matrix; Figure 2 A comparison chart showing the results of antibacterial performance tests and wash-resistant antibacterial retention performance tests for samples with different formulation ratios; Figure 3 A comparison chart of mechanical property test results for samples with different proportions; Figure 4 A comparison chart showing the test results of liquid absorption performance and user comfort for samples with different formulations. Detailed Implementation
[0020] The present invention will be further described below with reference to specific embodiments. However, the present invention is not limited to the following embodiments. Equivalent adjustments made without departing from the spirit and essence of the present invention should also be considered to fall within the protection scope of the present invention.
[0021] Example 1: This embodiment aims to verify the feasibility and stability of the present invention's technical solution in constructing antibacterial function under low modification conditions, when the dosage of each component and reaction conditions are all within the recommended lower limit range.
[0022] Preparation method S1, Preparation of synergistically modified fiber-reinforced matrix: 85 parts of polyethylene terephthalate fiber were weighed and dried at 80°C for 4 hours. Then, the dried fiber was heated to a surface-activated state, and 0.5 parts of maleic anhydride and 0.01 parts of di-tert-butyl peroxide were added. The grafting modification reaction was carried out at 180°C under a nitrogen protective atmosphere for 5 minutes. After the reaction, 0.5 parts of 3-aminopropyltriethoxysilane were added, and the silanization reaction was carried out at 60°C in an ethanol / water mixed solvent for 30 minutes. After the reaction, the fiber was cooled and dried to obtain a synergistically modified fiber-reinforced matrix. S2, loading of organic small molecule antibacterial regulator: At 20°C, 0.5 parts of 2,5-diaminobenzoic acid were introduced into the synergistically modified fiber-reinforced matrix by impregnation for 10 minutes, followed by dehydration and drying to obtain an antibacterial functional fiber material. S3, Weaving and Finishing: The obtained antibacterial functional fiber material was treated with 2 parts hydrophilic regulator, 0.1 parts crosslinking stabilizer, 0.1 parts anti-aging agent and 1 part film-forming and structural stabilizing agent. The treatment was carried out at 80°C for 5 minutes, followed by sterilization at 100°C for 10 minutes to obtain a reusable medical surgical towel reinforced with antibacterial modified fiber.
[0023] Example 2: This embodiment aims to verify the stable binding effect between the synergistic modified fiber structure and the organic small molecule antibacterial regulator when the proportions of each component and the reaction conditions are within the recommended intermediate range, as well as the optimal overall performance of the resulting medical surgical towel.
[0024] Preparation method S1, Preparation of synergistically modified fiber-reinforced matrix: 90 parts of polyethylene terephthalate fiber were weighed and dried at 100℃ for 8 hours. The dried fiber was heated to a surface-activated state, and 1.5 parts of maleic anhydride and 0.2 parts of di-tert-butyl peroxide were added. A grafting modification reaction was carried out at 200℃ under a nitrogen atmosphere for 15 minutes. Subsequently, 1.2 parts of 3-aminopropyltriethoxysilane were added, and a silanization reaction was carried out at 80℃ in an ethanol / water mixed solvent for 60 minutes. After the reaction, the fiber was cooled and dried to obtain a synergistically modified fiber-reinforced matrix. Figure 1 Infrared spectral comparisons show that the modified pre-polyethylene terephthalate fiber at 1715 cm⁻¹ -1 It exhibits a distinct characteristic absorption peak of the ester group C=O at 1240 cm⁻¹. -1 and 1100 cm -1The nearby peaks correspond to the C–O–C stretching vibration and C–O vibration of the ester bond, respectively, and are typical characteristic peaks of PET infrared radiation, indicating that the matrix fiber structure is intact. The modified sample, while retaining the original PET characteristic peaks, shows changes in the 3400–3300 cm⁻¹ range. -1 A significantly enhanced broad peak appears within the range of 1780–1850 cm⁻¹, characterizing the stretching vibrations of hydroxyl and amino groups; simultaneously, a peak appears within this range. -1 The appearance of new carbonyl absorption characteristics in the range indicates the successful grafting and introduction of maleic anhydride; 1100–1040 cm⁻¹ -1 The significantly enhanced regional absorption, attributed to Si–O–Si and Si–O–C structures, indicates that the silanization reaction occurred effectively. Comprehensive analysis shows that both maleic anhydride grafting and silanization modification were successfully achieved, synergistically constructing a stable reactive functional layer. S2, loading of organic small molecule antibacterial regulator: At 40°C, 2.5 parts of 2,5-diaminobenzoic acid were introduced into the synergistically modified fiber-reinforced matrix by impregnation for 60 minutes, followed by dehydration and drying to obtain an antibacterial functional fiber material. S3, Weaving and Finishing: The obtained antibacterial functional fiber material was treated with 5 parts of hydrophilic regulator, 1.0 part of crosslinking stabilizer, 0.5 parts of anti-aging agent and 3 parts of film-forming and structural stabilizing agent. The treatment was carried out at 120°C for 15 minutes, followed by sterilization at 120°C for 30 minutes to obtain a reusable medical surgical towel reinforced with antibacterial modified fiber.
[0025] Example 3: This embodiment aims to examine the load-bearing capacity of the synergistically modified fiber structure and the ultimate stability of the antibacterial function construction when the dosage of each component and the reaction conditions are within the recommended upper limit range.
[0026] Preparation method S1, Preparation of synergistically modified fiber-reinforced matrix: 95 parts of polyethylene terephthalate fiber were weighed and dried at 120℃ for 12 hours. The dried fiber was heated to a surface-activated state, and 3.0 parts of maleic anhydride and 0.5 parts of di-tert-butyl peroxide were added. The grafting modification reaction was carried out at 220℃ under a nitrogen protective atmosphere for 30 minutes. Subsequently, 2.0 parts of 3-aminopropyltriethoxysilane were added, and the silanization reaction was carried out at 100℃ in an ethanol / water mixed solvent for 120 minutes. After the reaction was completed, the fiber was cooled and dried to obtain the synergistically modified fiber-reinforced matrix. S2, loading of organic small molecule antibacterial regulator: At 60°C, 5.0 parts of 2,5-diaminobenzoic acid were introduced into the synergistically modified fiber-reinforced matrix by impregnation for 120 minutes, followed by dehydration and drying to obtain an antibacterial functional fiber material. S3, Weaving and Finishing: The obtained antibacterial functional fiber material was treated with 8 parts of hydrophilic regulator, 2.0 parts of crosslinking stabilizer, 1.0 part of anti-aging agent and 5 parts of film-forming and structural stabilizing agent. The treatment was carried out at 150℃ for 30 minutes, followed by sterilization at 140℃ for 60 minutes to obtain a reusable medical surgical towel reinforced with antibacterial modified fiber.
[0027] Comparative Example 1: This comparative example aims to verify the effect of introducing carboxyl active sites by grafting maleic anhydride alone, without further silanization, on the stable loading effect of 2,5-diaminobenzoic acid and the overall performance of the resulting medical surgical towel.
[0028] Preparation method S1, Preparation of synergistically modified fiber-reinforced matrix: Weigh 90 parts of polyethylene terephthalate fiber and dry it at 100℃ for 8 hours; heat the dried fiber to a surface activated state, add 1.5 parts of maleic anhydride and 0.2 parts of di-tert-butyl peroxide, and carry out a grafting modification reaction at 200℃ under a nitrogen protective atmosphere for 15 minutes; after the reaction is completed, cool and dry to obtain the fiber-reinforced matrix; S2, loading of organic small molecule antibacterial regulator: At 40°C, 2.5 parts of 2,5-diaminobenzoic acid were introduced into the fiber-reinforced matrix by impregnation for 60 minutes, followed by dehydration and drying to obtain an antibacterial functional fiber material. S3, Weaving and Finishing: The obtained antibacterial functional fiber material was treated with 5 parts hydrophilic regulator, 1.0 part crosslinking stabilizer, 0.5 parts anti-aging agent and 3 parts film-forming and structural stabilizing agent. The treatment was carried out at 120°C for 15 minutes, followed by sterilization at 120°C for 30 minutes to obtain a reusable medical surgical towel.
[0029] Comparative Example 2: This comparative example aims to verify the effect of using only 3-aminopropyltriethoxysilane to silanize the fiber surface without introducing carboxyl active sites through maleic anhydride grafting on the stable loading effect of 2,5-diaminobenzoic acid and the overall performance of the resulting medical surgical towel.
[0030] Preparation method S1, Preparation of synergistically modified fiber-reinforced matrix: Weigh 90 parts of polyethylene terephthalate fiber and dry it at 100℃ for 8 hours; heat the dried fiber to a surface activated state, add 1.2 parts of 3-aminopropyltriethoxysilane, and carry out a silanization reaction at 80℃ in an ethanol / water mixed solvent for 60 minutes. After the reaction is completed, cool and dry to obtain the fiber-reinforced matrix. S2, loading of organic small molecule antibacterial regulator: At 40°C, 2.5 parts of 2,5-diaminobenzoic acid were introduced into the fiber-reinforced matrix by impregnation for 60 minutes, followed by dehydration and drying to obtain an antibacterial functional fiber material. S3, Weaving and Finishing: The obtained antibacterial functional fiber material was treated with 5 parts hydrophilic regulator, 1.0 part crosslinking stabilizer, 0.5 parts anti-aging agent and 3 parts film-forming and structural stabilizing agent. The treatment was carried out at 120°C for 15 minutes, followed by sterilization at 120°C for 30 minutes to obtain a reusable medical surgical towel.
[0031] Comparative Example 3: This comparative example aims to verify the effect of not introducing 2,5-diaminobenzoic acid on the antibacterial properties and washability of the resulting medical surgical towels, while keeping the synergistically modified fiber-reinforced matrix and auxiliary agent system unchanged.
[0032] Preparation method S1, Preparation of synergistically modified fiber-reinforced matrix: 90 parts of polyethylene terephthalate fiber were weighed and dried at 100℃ for 8 hours. The dried fiber was heated to a surface-activated state, and 1.5 parts of maleic anhydride and 0.2 parts of di-tert-butyl peroxide were added. The grafting modification reaction was carried out at 200℃ under a nitrogen protective atmosphere for 15 minutes. Subsequently, 1.2 parts of 3-aminopropyltriethoxysilane were added, and the silanization reaction was carried out at 80℃ in an ethanol / water mixed solvent for 60 minutes. After the reaction was completed, the fiber was cooled and dried to obtain the synergistically modified fiber-reinforced matrix. S2, loading of organic small molecule antibacterial regulator: At 40°C, without the addition of 2,5-diaminobenzoic acid, the synergistically modified fiber-reinforced matrix was impregnated for 60 minutes, followed by dehydration and drying to obtain the fiber material. S3, Weaving and Finishing: The obtained fiber material was treated with 5 parts hydrophilic regulator, 1.0 part crosslinking stabilizer, 0.5 parts anti-aging agent and 3 parts film-forming and structural stabilizing agent. The treatment was carried out at 120°C for 15 minutes, followed by sterilization at 120°C for 30 minutes to obtain a reusable medical surgical towel.
[0033] Performance testing: 1. Antibacterial performance test method The antibacterial properties of the medical surgical towels obtained in the examples and comparative examples were evaluated using a quantitative antibacterial test method. Common medical-related bacteria were selected as test species. The surgical towel samples were cut to the specified size and sterilized, then contacted with bacterial solution and incubated at a constant temperature for a certain period of time. After incubation, the bacteria on the sample surface were recovered by elution, and the colony growth was statistically analyzed to evaluate the inhibitory ability of each sample on bacterial growth, thereby comparing the differences in antibacterial effects between the examples and comparative examples.
[0034] 2. Test method for wash resistance and antibacterial retention performance To evaluate the stability of the antibacterial properties of medical surgical towels under reusable conditions, the sample samples from the examples and comparative examples underwent multiple standard washing treatments. The washing process employed common medical textile washing procedures, with cyclic washing performed under specified temperature and conditions, and samples were taken after different number of washes. The washed samples were then subjected to antibacterial tests according to the aforementioned antibacterial performance testing method. By comparing the changes in antibacterial properties before and after washing, the wash resistance of each sample was evaluated.
[0035] 3. Mechanical property testing methods To evaluate the structural stability of medical surgical drapes during repeated processing and use, the mechanical properties of the example and comparative samples were tested. The samples were cut to specified dimensions, conditioned under standard environmental conditions, and then their breaking strength and elongation at break were tested using fabric mechanical property testing equipment. By comparing the differences in mechanical properties between the example and comparative samples, the influence of the synergistically modified fiber reinforcement structure on the retention of mechanical strength of the medical surgical drapes was evaluated.
[0036] 4. Test methods for liquid absorption performance and user comfort To evaluate the absorbency and comfort of medical surgical drapes in actual use, absorbency tests were conducted on the example and comparative samples. The samples were placed in a simulated bodily fluid environment, and their absorption was observed within a specified time. The dryness of the sample surface and the state of liquid diffusion were recorded. Simultaneously, a comprehensive evaluation was conducted considering the sample's feel, softness, and surface wettability to compare the differences in absorbency and comfort among different samples under clinical use conditions.
[0037] Table 1 Performance test results of the examples and comparative examples As shown in Table 1, the examples and comparative examples exhibit significant differences in antibacterial properties, washability and antibacterial retention, mechanical properties, and liquid absorption properties. Example 2 demonstrates the best performance across all indicators, while the overall performance of Examples 1 and 3 is significantly superior to their corresponding comparative examples. This indicates that the combination of the synergistic modified fiber reinforcement system and the organic small molecule antibacterial regulator used in this invention can effectively improve the overall performance of medical surgical drapes.
[0038] In terms of antibacterial properties, Figure 2 The initial antibacterial rates of Examples 1, 2, and 3 reached 94.2%, 99.1%, and 96.8%, respectively, significantly higher than Comparative Examples 1 and 2, and far higher than Comparative Example 3, which did not introduce an organic small molecule antibacterial regulator. In particular, Example 2 had an antibacterial rate close to 99%, indicating that the antibacterial function was fully utilized under the combined action of the synergistic modification of the fiber structure and 2,5-diaminobenzoic acid.
[0039] Regarding its washability and antibacterial properties Figure 2 The examples maintained high antibacterial levels after 50 washes, with Example 2 showing an antibacterial retention rate of 95.8%, Examples 3 and 1 at 90.4% and 86.5%, respectively. Comparative Examples 1 and 2 showed significantly decreased antibacterial retention rates after washing, with Comparative Example 3 exhibiting the lowest retention rate. These results indicate that antibacterial components are difficult to maintain stably when modified alone or lacking organic small molecules, while the synergistic modified structure of this invention can significantly improve the wash resistance stability of the antibacterial function.
[0040] In terms of mechanical properties, Figure 3 The breaking strength of all embodiments remained at a high level, with Example 2 reaching 452 N. Examples 3 and 1 also exhibited good mechanical properties, indicating that the synergistic modification treatment did not weaken the structural strength of the fiber. In contrast, the breaking strength of Comparative Examples 1 and 2 was slightly lower, indicating that a single modification method has a limited effect on fiber reinforcement.
[0041] In terms of liquid absorption performance, Figure 4 The overall performance of the intermediate examples was better than that of the comparative examples. Specifically, Example 2 had a liquid absorption capacity of 7.6 g / g, while Examples 3 and 1 had 7.1 g / g and 6.8 g / g, respectively. This indicates that while introducing antibacterial function, the fabric still maintained good liquid absorption capacity and performance. The comparative examples showed relatively low liquid absorption performance, indicating that the auxiliary agent system of the present invention did not adversely affect the basic performance of the fabric during the functionalization process.
[0042] In summary, Example 2 exhibits the best performance in terms of antibacterial properties, washability, mechanical properties, and absorbency. The overall performance of Example 2 is significantly better than that of the comparative example, which fully demonstrates that the present invention achieves long-term stability of antibacterial properties and simultaneous improvement of the overall performance of medical surgical towels through the combined design of synergistic modified fiber reinforcement structure and organic small molecule antibacterial regulator.
Claims
1. A reusable medical surgical towel reinforced with antibacterial modified fibers, characterized in that, The medical surgical towel is woven from an antibacterial functional fiber material, which comprises the following raw materials in parts by weight: 60-80 parts of synergistic modified fiber reinforcing matrix; 0.5-5 parts of organic small molecule antibacterial regulator; and 2-8 parts of hydrophilic regulator. Crosslinking stabilizer 0.1-2 parts; anti-aging agent 0.1-1 part; film-forming and structural stabilizing agent 1-5 parts; wherein the synergistic modified fiber reinforcing matrix is formed by grafting maleic anhydride with carboxyl active sites under the action of an initiator, and further silanizing the fiber surface with 3-aminopropyltriethoxysilane; the organic small molecule antibacterial regulator is 2,5-diaminobenzoic acid, which is loaded onto the fiber through intermolecular interaction and stabilization with the reactive functional layer.
2. The reusable medical surgical towel reinforced with antibacterial modified fiber according to claim 1, characterized in that, The synergistically modified fiber-reinforced matrix comprises the following raw materials in parts by weight: 85-95 parts of polyethylene terephthalate fiber; 0.5-3.0 parts of maleic anhydride; 0.5-2.0 parts of 3-aminopropyltriethoxysilane; and 0.01-0.5 parts of di-tert-butyl peroxide.
3. A reusable medical surgical towel reinforced with antibacterial modified fiber according to claim 1 or 2, characterized in that, The preparation method of the synergistically modified fiber-reinforced matrix includes the following steps: (1) Dry the polyethylene terephthalate fiber to remove residual moisture, and then heat it to a molten or surface-activated state. (2) Maleic anhydride and di-tert-butyl peroxide were added to polyethylene terephthalate fiber and grafted under heating and stirring conditions to graft maleic anhydride onto the fiber molecular chain to obtain modified fiber containing carboxyl active sites. (3) Add 3-aminopropyltriethoxysilane to the modified fiber and carry out silanization reaction under heating conditions. After the reaction is completed, cool and dry to obtain the synergistic modified fiber reinforced matrix.
4. The reusable medical surgical towel reinforced with antibacterial modified fiber according to claim 3, characterized in that, The reaction conditions for step (1) are to dry the polyethylene terephthalate fiber at 80-120°C for 4-12 hours.
5. The reusable medical surgical towel reinforced with antibacterial modified fiber according to claim 3, characterized in that, The reaction conditions for step (2) are as follows: maleic anhydride and di-tert-butyl peroxide are added to polyethylene terephthalate fiber at 180-220°C for graft modification reaction, the reaction time is 5-30 minutes, and the reaction is carried out under a nitrogen protective atmosphere.
6. The reusable medical surgical towel reinforced with antibacterial modified fiber according to claim 3, characterized in that, The reaction conditions for step (3) are as follows: 3-aminopropyltriethoxysilane is added at 60-100°C for silanization reaction, the reaction time is 30-120 minutes, and the reaction medium is a mixed solvent of ethanol and water.
7. The reusable medical surgical towel reinforced with antibacterial modified fiber according to claim 1, characterized in that, The hydrophilic modifier is a mixture of polyethylene glycol 400 and polyvinylpyrrolidone K30 in a mass ratio of (3-7):(7-3); the crosslinking stabilizer is a mixture of 1,2,3,4-butanetetracarboxylic acid and sodium hypophosphite in a mass ratio of (5-15):(1-3); the anti-aging agent is a mixture of hindered phenolic antioxidant 1010 and phosphite antioxidant 168 in a mass ratio of (1-4):(4-1); and the film-forming and structural stabilizing agent is a mixture of aqueous polyurethane dispersion and polyvinyl alcohol in a mass ratio of (6-9):(4-1).
8. A method for preparing a reusable medical surgical drape reinforced with antibacterial modified fibers, characterized in that, The preparation method includes the following steps: S1, 2,5-Diaminobenzoic acid is introduced into the synergistically modified fiber reinforcement matrix, and through impregnation or mixing, it is made to interact with the reactive functional layer on the fiber surface and be stably bonded to obtain antibacterial functional fiber material. S2 involves treating antibacterial functional fiber materials with hydrophilic regulators, crosslinking stabilizers, anti-aging agents, and film-forming and structural stabilizing agents, then weaving them into medical surgical drapes, followed by drying and sterilization to obtain reusable medical surgical drapes reinforced with antibacterial modified fibers.
9. The method for preparing an antibacterial modified fiber-reinforced reusable medical surgical towel according to claim 8, characterized in that, The reaction conditions for step S2 are as follows: 2,5-diaminobenzoic acid is introduced into the synergistically modified fiber-reinforced matrix by impregnation at 20-60°C for 10-120 minutes, followed by dehydration and drying.
10. The method for preparing an antibacterial modified fiber-reinforced reusable medical surgical towel according to claim 8, characterized in that, The reaction conditions for step S3 are as follows: finishing and drying are carried out at 80-150°C for 5-30 minutes, followed by sterilization at 100-140°C for 10-60 minutes.