Water-washing resistant skin-friendly synergistically modified bedding functional fiber and preparation method thereof

Abstract

The present application relates to the field of functional fiber and textile finishing technology, and particularly relates to a kind of washable skin-friendly synergistic modified bedding functional fiber and its preparation method.Functional fiber includes base fiber material, biomimetic adhesion dynamic crosslinking ion association modified polymer, organic small molecule functional regulator and polyether modified silicone oil, fatty alcohol polyoxyethylene ether, glyoxal, citric acid and antioxidant 1010.Biomimetic adhesion dynamic crosslinking ion association modified polymer is formed by polydopamine adhesion layer through oxidation self-polymerization of dopamine hydrochloride, and constructs dynamic crosslinking structure with protoacraldehyde and polyethylene imine, while introducing quaternary phosphonium salt modifier to form ion association structure;Organic small molecule functional regulator is ergothioneine.Through synergistic modification, a stable composite modified layer is constructed on the surface of the fiber, and the effective fixation of functional components is realized.The preparation method of the present application is simple and controllable, and the obtained functional fiber has excellent washable performance and skin-friendly performance, and is suitable for bedding field.

Description

Technical Field

[0001] This invention relates to the field of functional fiber and textile finishing technology, specifically to a water-resistant, skin-friendly synergistic modified bedding functional fiber and its preparation method. Background Technology

[0002] With the improvement of people's living standards and the enhancement of health awareness, the requirements for comfort, safety and functionality of bedding are constantly increasing, especially in terms of skin-friendliness, washability and long-term stability. Currently, most bedding products use materials such as polyethylene terephthalate fiber, polyamide fiber and regenerated cellulose fiber. Although these fibers have good mechanical and processing properties, their surface inertness and insufficient skin-friendliness make them difficult to meet the needs of high-end bedding.

[0003] To improve fiber functionality, existing technologies typically introduce functional components such as softeners, hydrophilic agents, or antibacterial agents onto the fiber surface through finishing processes. However, these finishing methods often rely on physical adsorption or simple chemical bonding, resulting in weak adhesion between the functional layer and the fiber matrix. These functional layers are prone to detachment during repeated washing, leading to rapid functional degradation and making it difficult to achieve long-term stable performance. Furthermore, some finishing agents can be irritating or cause a stiffening of the fabric, affecting its comfort and safety.

[0004] Existing studies have attempted to modify fibers through silane coupling, polyphenol deposition, or single crosslinking systems, but these methods still suffer from limitations such as simple modified structures, limited interfacial bonding mechanisms, and insignificant improvements in washability. Furthermore, achieving a balance between softness and stability remains challenging. In particular, when introducing skin-friendly functional small molecules, the lack of an effective fixation mechanism makes these molecules highly susceptible to loss during washing, hindering their sustained effectiveness.

[0005] Therefore, there is an urgent need to develop a new fiber modification technology that can construct a stable interface structure with multiple mechanisms of action to achieve efficient fixation of functional components while ensuring the softness and comfort of the fibers, thereby significantly improving the skin-friendly properties and overall performance of bedding under multiple washing conditions. Summary of the Invention

[0006] To overcome the problems of insufficient skin-friendliness of functional fibers in bedding, poor washability of the functional finishing layer, and easy loss of functional small molecules in the aforementioned background technology, the present invention aims to provide a washable and skin-friendly synergistic modified functional fiber for bedding and its preparation method. The present invention introduces a biomimetic adhesion dynamic cross-linking ion-association modified polymer onto the surface of the matrix fiber. An adhesion layer is formed through dopamine oxidation self-polymerization, and a dynamic cross-linking network is constructed using protocatechuic aldehyde and polyethyleneimine. Simultaneously, a quaternary phosphonium salt modifier is introduced to form an ion-association structure, constructing a stable composite modified layer on the fiber surface. Furthermore, ergothioneine is introduced as an organic small molecule functional regulator, embedding it into the modified layer, thereby achieving stable fixation of functional components and improved skin-friendliness. The multi-synergistic modified structure constructed in this invention significantly improves the washability and skin-friendliness of the functional fiber.

[0007] The objective of this invention can be achieved through the following technical solutions: A water-resistant, skin-friendly, and synergistically modified functional fiber for bedding, comprising the following raw materials in parts by weight: 70-95 parts of matrix fiber material; 3-18 parts of biomimetic adhesion dynamic crosslinking ion-association modified polymer; 0.2-4 parts of organic small molecule functional regulator; 0.2-3 parts of polyether-modified silicone oil; 0.1-2 parts of fatty alcohol polyoxyethylene ether; 0.1-2 parts of glyoxal; 0.1-2 parts of citric acid; and 0.05-1 part of antioxidant 1010. The biomimetic adhesion dynamic crosslinking ion-association modified polymer is a composite functional polymer formed by the oxidative self-polymerization of dopamine hydrochloride to form a polydopamine adhesion matrix, and the subsequent construction of a dynamic crosslinking structure with protocatechuic aldehyde and polyethyleneimine through Schiff base reaction and Michael addition reaction. A quaternary phosphonium salt modifier is introduced for further modification through ion association. The organic small molecule functional regulator is ergothioneine.

[0008] Optionally, the biomimetic adhesion dynamic crosslinking ion-association modified polymer comprises the following raw materials in parts by weight: 0.5 to 5 parts of dopamine hydrochloride, 0.3 to 4 parts of protocatechuic aldehyde, 0.5 to 6 parts of polyethyleneimine, and 0.2 to 3 parts of quaternary phosphonium salt modifier.

[0009] Optionally, the preparation method of the biomimetic adhesion dynamic crosslinking ion association modified polymer includes the following steps: (1) Dopamine hydrochloride was subjected to oxidative self-polymerization to obtain a prepolymer system containing polydopamine; (2) Protocatechuic aldehyde and polyethyleneimine were added to the prepolymer system to react and construct a dynamic cross-linked network structure; (3) Add quaternary phosphonium salt modifier to the dynamic cross-linked network structure and react to obtain a biomimetic adhesion dynamic cross-linked ion association modified polymer.

[0010] Optionally, the reaction conditions in step (1) are as follows: dopamine hydrochloride is prepared into a solution with a concentration of 1-5 g / L, the pH is adjusted to 8.5-8.8 in a 10 mmol / L Tris buffer solution, and the reaction is carried out at 25-35°C and stirred at 200-500 rpm for 2-3 hours.

[0011] Optionally, the reaction conditions in step (2) are as follows: the mass ratio of protocatechuic aldehyde to polyethyleneimine is 1:(1-3), and the reaction is carried out at 30-50°C and stirred at 300-600 rpm for 3-5 hours.

[0012] Optionally, the reaction conditions in step (3) are as follows: the amount of quaternary phosphonium salt modifier added is 1 to 10% of the mass of the system obtained in step (2), and the reaction is carried out at 45 to 65°C and stirred at 200 to 500 rpm for 1.5 to 2.5 hours.

[0013] Optionally, a method for preparing a water-resistant, skin-friendly, synergistically modified functional fiber for bedding, the method comprising the following steps: S1, after pretreating the matrix fiber material, add biomimetic adhesion dynamic cross-linking ion association modified polymer and organic small molecule functional regulator for impregnation treatment to obtain preliminary modified fiber; S2, polyether-modified silicone oil, fatty alcohol polyoxyethylene ether, glyoxal, citric acid and antioxidant 1010 are added to the pre-modified fiber for finishing treatment, so that the components are further distributed on the fiber surface and have a synergistic effect. S3 involves drying and heat-treating the fibers to obtain water-resistant, skin-friendly, and synergistically modified functional fibers for bedding.

[0014] Optionally, the reaction conditions for step S1 are as follows: the matrix fiber material is added to the impregnation solution at a bath ratio of 1:20 to 1:50, wherein the concentration of the biomimetic adhesion dynamic crosslinking ion association modified polymer in the impregnation solution is 1 to 10 g / L and the concentration of the organic small molecule functional regulator is 0.5 to 5 g / L, and the mixture is stirred and impregnated at 30 to 60°C and 100 to 300 rpm for 30 to 90 minutes.

[0015] Optionally, the reaction conditions in step S2 are as follows: the concentration of polyether-modified silicone oil in the finishing solution is 1-5 g / L, the concentration of fatty alcohol polyoxyethylene ether is 0.5-3 g / L, the concentration of glyoxal is 0.5-3 g / L, the concentration of citric acid is 0.5-3 g / L, and the concentration of antioxidant 1010 is 0.1-1 g / L; the solution is subjected to padding treatment at 40-70°C, and the padding rate is 60%-100%.

[0016] Optionally, the reaction conditions for step S3 are: first drying at 80–100°C for 10–30 min, and then heat treatment at 120–150°C for 2–10 min.

[0017] The beneficial effects of this invention are: This invention constructs a multi-synergistic interface consisting of a polydopamine biomimetic adhesion layer, a dynamic Schiff base crosslinking network formed by protocatechuic aldehyde and polyethyleneimine, and a quaternary phosphonium salt ion association structure. This enables a strong interfacial bond and a reconfigurable network structure between the modified layer and the matrix fiber. This not only significantly improves the structural stability and adhesion of the finishing layer during repeated washing, but also effectively avoids the hardening problem caused by traditional crosslinking systems. At the same time, ergothioneine is introduced into this composite modified layer, achieving stable embedding in the interface through hydrogen bonding and electrostatic interactions. This allows it to maintain a high residue rate even after multiple washes, thus continuously imparting excellent skin-friendliness, low irritation, and surface comfort to the fiber during long-term use. It exhibits a comprehensive performance improvement effect that is significantly superior to existing technologies. 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 unmodified matrix fibers and biomimetic adhesion dynamic cross-linked ion-association modified functional fibers; Figure 2 A comparison chart showing the water wash resistance test results of 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 example is used to verify that under the lower limits of each component and process parameter, the present invention can still form a stable modified layer and have basic water resistance and skin-friendly properties.

[0022] Preparation method: S1, Preparation of biomimetic adhesion dynamic crosslinking ion-association modified polymers Dopamine hydrochloride 0.5 parts were prepared into a 1 g / L solution, and the pH was adjusted to 8.5 in 10 mmol / L Tris buffer solution. The mixture was stirred at 200 rpm for 2 h at 25 °C to induce oxidative self-polymerization and obtain a prepolymer system. Then, 0.3 parts of protocatechuic aldehyde and 0.5 parts of polyethyleneimine (mass ratio 1:1) were added, and the mixture was reacted at 30 °C and 300 rpm for 3 h to construct a dynamic crosslinking network. Finally, 0.2 parts of quaternary phosphonium salt modifier were added, and the mixture was reacted at 45 °C and 200 rpm for 1.5 h to obtain a biomimetic adhesion dynamic crosslinking ion-association modified polymer. S2, Impregnation and Finishing 70 parts of the matrix fiber material were added to the impregnation solution at a bath ratio of 1:20. The impregnation solution contained 1 g / L of the modified polymer and 0.5 g / L of ergothioneine. The mixture was impregnated at 30°C and 100 rpm for 30 min to obtain the preliminary modified fiber. Subsequently, 0.2 parts of polyether-modified silicone oil, 0.1 parts of fatty alcohol polyoxyethylene ether, 0.1 parts of glyoxal, 0.1 parts of citric acid, and 0.05 parts of antioxidant 1010 were added. The mixture was then subjected to padding treatment at 40°C with a padding rate of 60%. S3, Drying and Heat Treatment The fiber was dried at 80℃ for 10 minutes and then heat-treated at 120℃ for 2 minutes to obtain a water-resistant, skin-friendly, and synergistically modified functional fiber for bedding.

[0023] Example 2: This example is used to verify that under preferred moderate conditions, the synergistic effect of each component reaches the optimal balance, thereby obtaining excellent water resistance and skin-friendly properties.

[0024] Preparation method: S1, Preparation of biomimetic adhesion dynamic crosslinking ion-association modified polymers Dopamine hydrochloride was prepared into a 3 g / L solution, and the pH was adjusted to 8.6 in a 10 mmol / L Tris buffer solution. The mixture was stirred at 350 rpm for 2.5 h at 30 °C to obtain a prepolymer system. Then, 2 parts of protocatechuic aldehyde and 3 parts of polyethyleneimine (mass ratio 1:1.5) were added, and the mixture was reacted at 40 °C and 450 rpm for 4 h to construct a dynamic crosslinking network. Finally, 1.5 parts of quaternary phosphonium salt modifier were added, and the mixture was reacted at 55 °C and 350 rpm for 2 h to obtain the modified polymer. S2, Impregnation and Finishing 82 parts of the matrix fiber material were added to the impregnation solution at a bath ratio of 1:35. The impregnation solution contained 5 g / L of modified polymer and 2.5 g / L of ergothioneine. The mixture was impregnated at 45°C and 200 rpm for 60 min. Subsequently, 1.5 parts of polyether-modified silicone oil, 1 part of fatty alcohol polyoxyethylene ether, 1 part of glyoxal, 1 part of citric acid, and 0.5 parts of antioxidant 10100 were added. The mixture was then subjected to padding treatment at 55°C with a padding rate of 80%. S3, Drying and Heat Treatment First, dry at 90℃ for 20 minutes, then heat treat at 135℃ for 6 minutes to obtain the target functional fiber.

[0025] Example 3: This example is used to verify the effect of further improving the stability and functional durability of the modified layer structure under high addition amount and strengthening process conditions.

[0026] Preparation method: S1, Preparation of biomimetic adhesion dynamic crosslinking ion-association modified polymer: Five parts of dopamine hydrochloride were prepared into a 5 g / L solution, and the pH was adjusted to 8.8 in a 10 mmol / L Tris buffer solution. The mixture was stirred at 500 rpm for 3 h at 35 °C to obtain a prepolymer system. Subsequently, four parts of protocatechuic aldehyde and six parts of polyethyleneimine (mass ratio 1:3) were added, and the mixture was reacted at 50 °C and 600 rpm for 5 h to construct a dynamic crosslinking network. Then, three parts of quaternary phosphonium salt modifier were added, and the mixture was reacted at 65 °C and 500 rpm for 2.5 h to obtain the modified polymer. S2, Impregnation and Finishing 95 parts of the matrix fiber material were added to the impregnation solution at a bath ratio of 1:50. The impregnation solution contained 10 g / L of modified polymer and 5 g / L of ergothioneine. The mixture was impregnated at 60°C and 300 rpm for 90 min. Subsequently, 3 parts of polyether-modified silicone oil, 2 parts of fatty alcohol polyoxyethylene ether, 2 parts of glyoxal, 2 parts of citric acid, and 10101 parts of antioxidant were added. The mixture was then subjected to padding treatment at 70°C with a padding rate of 100%. S3, Drying and Heat Treatment First, dry at 100℃ for 30 minutes, then heat treat at 150℃ for 10 minutes to obtain water-resistant, skin-friendly, and synergistically modified functional fibers for bedding.

[0027] Comparative Example 1: This comparative example is used to verify the effect of using only a polydopamine biomimetic adhesive layer on the wash resistance and skin-friendly properties of the fiber.

[0028] Preparation method: S1, Preparation of biomimetic adhesion-modified polymers 2.5 parts of dopamine hydrochloride were prepared into a 3 g / L solution, and the pH was adjusted to 8.6 in a 10 mmol / L Tris buffer solution. The solution was stirred at 350 rpm for 2.5 h at 30 °C to induce oxidative self-polymerization and obtain a polydopamine modified system. S2, Impregnation and Finishing 82 parts of the matrix fiber material were added to the impregnation solution at a bath ratio of 1:35. The impregnation solution contained a modified system concentration of 5 g / L and ergothioneine concentration of 2.5 g / L. The mixture was impregnated at 45°C and 200 rpm for 60 min. Subsequently, 1.5 parts of polyether-modified silicone oil, 1 part of fatty alcohol polyoxyethylene ether, 1 part of glyoxal, 1 part of citric acid, and 0.5 parts of antioxidant 10100 were added. The mixture was then subjected to padding treatment at 55°C with a padding rate of 80%. S3, Drying and Heat Treatment First, dry at 90℃ for 20 minutes, then heat treat at 135℃ for 6 minutes to obtain the target functional fiber.

[0029] Comparative Example 2: This comparative example is used to verify the effect of dynamic cross-linking structure on water wash resistance stability in the absence of quaternary phosphonium salt ion association.

[0030] Preparation method: S1, Preparation of biomimetic adhesion dynamic crosslinking modified polymer Dopamine hydrochloride was prepared into a 3 g / L solution, and the pH was adjusted to 8.6 in a 10 mmol / L Tris buffer solution. The solution was stirred at 350 rpm for 2.5 h at 30 °C to obtain a prepolymer system. Then, 2 parts of protocatechuic aldehyde and 3 parts of polyethyleneimine (mass ratio 1:1.5) were added, and the mixture was reacted at 40 °C and 450 rpm for 4 h to construct a dynamic crosslinked network. S2, Impregnation and Finishing 82 parts of the matrix fiber material were added to the impregnation solution at a bath ratio of 1:35. The impregnation solution contained 5 g / L of modified polymer and 2.5 g / L of ergothioneine. The mixture was impregnated at 45°C and 200 rpm for 60 min. Subsequently, 1.5 parts of polyether-modified silicone oil, 1 part of fatty alcohol polyoxyethylene ether, 1 part of glyoxal, 1 part of citric acid, and 0.5 parts of antioxidant 10100 were added. The mixture was then subjected to padding treatment at 55°C with a padding rate of 80%. S3, Drying and Heat Treatment First, dry at 90℃ for 20 minutes, then heat treat at 135℃ for 6 minutes to obtain the target functional fiber.

[0031] Comparative Example 3: This comparative example is used to verify the effect of the absence of organic small molecule functional regulators (ergothionein) on the skin-friendly properties and washability of fibers.

[0032] Preparation method: S1, Preparation of biomimetic adhesion dynamic crosslinking ion-association modified polymers Dopamine hydrochloride was prepared into a 3 g / L solution, and the pH was adjusted to 8.6 in a 10 mmol / L Tris buffer solution. The mixture was stirred at 350 rpm for 2.5 h at 30 °C to obtain a prepolymer system. Then, 2 parts of protocatechuic aldehyde and 3 parts of polyethyleneimine (mass ratio 1:1.5) were added, and the mixture was reacted at 40 °C and 450 rpm for 4 h to construct a dynamic crosslinking network. Finally, 1.5 parts of quaternary phosphonium salt modifier were added, and the mixture was reacted at 55 °C and 350 rpm for 2 h to obtain the modified polymer. S2, Impregnation and Finishing 82 parts of the matrix fiber material were added to the impregnation solution at a bath ratio of 1:35. The concentration of the modified polymer in the impregnation solution was 5 g / L. The mixture was impregnated at 45°C and 200 rpm for 60 min. Subsequently, 1.5 parts of polyether-modified silicone oil, 1 part of fatty alcohol polyoxyethylene ether, 1 part of glyoxal, 1 part of citric acid, and 10100.5 parts of antioxidant were added. The mixture was then subjected to padding treatment at 55°C with a padding rate of 80%. S3, Drying and Heat Treatment First, dry at 90℃ for 20 minutes, then heat treat at 135℃ for 6 minutes to obtain the target functional fiber.

[0033] Performance testing: 1. Water wash resistance test method The functional fibers obtained from the examples and comparative examples were woven into standard samples and subjected to washing tests according to GB / T3921 standard, with the number of washing cycles set at 10, 20, and 30. After each specified number of washing cycles, the samples were dried and their finishing effect retention rate was measured. The retention rate was calculated by comparing the changes in hygroscopicity or contact angle of the samples before and after washing, thereby evaluating the stability and durability of the functional layer during repeated washing.

[0034] 2. Skin-friendliness testing method The samples were evaluated using a combination of hand feel assessment and skin contact comfort testing. Five to ten testers were selected to rate the softness, fineness, and smoothness of the fabric on a scale of 1 to 5, and the average score was taken as the result. Simultaneously, a simulated skin contact experiment was conducted to observe the irritation and discomfort experienced during the contact between the fabric and the skin, in order to comprehensively evaluate its skin-friendly properties.

[0035] 3. Moisture Absorption Performance Test Method According to GB / T21655, the moisture absorption capacity of the sample is tested; after the sample is placed in a constant temperature and humidity environment for equilibration, the mass change before and after moisture absorption is recorded, and the moisture absorption rate is calculated; the higher the moisture absorption rate, the stronger the material's ability to regulate moisture, thus indirectly reflecting its skin-friendliness and wearing comfort.

[0036] 4. Test method for functional retention rate after washing After the samples were washed multiple times, their key performance indicators, such as moisture absorption rate or hand feel score, were tested and compared with unwashed samples. The retention rate of the functional components after repeated washing was evaluated by calculating the performance retention rate. The higher the retention rate, the stronger the ability of the modified system to fix functional small molecules, reflecting its excellent water-washing stability.

[0037] Table 1 Performance Test Results

[0038] As shown in Table 1, there are significant differences between the embodiments and the comparative examples in terms of water resistance, skin affinity and moisture absorption. The overall performance of the embodiments is better than that of the comparative examples, and the performance of embodiment 2 is the most outstanding in all indicators, indicating that the synergistic modification system constructed by the present invention has a significant performance improvement effect.

[0039] In terms of water resistance, the functional retention rates of Examples 1-3 after 30 washes were 78%, 92%, and 88%, respectively, which were significantly higher than the 62%-70% of the comparative examples. In particular, Example 2 reached 92%, indicating that the composite modified structure constructed by biomimetic adhesion, dynamic cross-linking, and ionic association can effectively improve the stability of the functional layer during repeated water washing. In contrast, the comparative examples lacked a complete synergistic structure, which led to easy loss of functional components and significantly insufficient stability.

[0040] In terms of skin-friendliness, the hand feel scores of all the examples were above 4.2, with Example 2 reaching 4.8, which was significantly better than the comparative examples of 3.6 to 3.9. This indicates that while ensuring structural stability, the present invention did not cause the fabric to become stiff. On the contrary, through reasonable network structure and organic small molecule regulation, it achieved a synergistic improvement in softness and comfort.

[0041] In terms of moisture absorption performance, the moisture absorption rates of the examples were all higher than 10%, which was significantly better than the 6.9% to 7.5% of the comparative examples. Among them, Example 2 reached 11.2%, indicating that the introduced organic small molecule functional regulator can play an effective role in the synergistic modification of the structure, improve the material's ability to regulate moisture, and thus enhance the skin-friendliness and comfort of the fabric.

[0042] In terms of performance retention rate after washing, all examples achieved over 80%, with Example 2 reaching as high as 93%, while the comparative examples were only 65% ​​to 72%. This further proves that the modified system constructed by the present invention can effectively fix functional components and significantly improve the performance retention capability during long-term use.

[0043] In summary, this invention achieves a synergistic improvement in water resistance, skin affinity, and moisture absorption by constructing a biomimetic adhesion dynamic cross-linking ion association synergistic modification structure and introducing organic small molecule functional regulators, demonstrating a comprehensive performance advantage that is significantly superior to existing technologies.

Claims

1. A water-resistant, skin-friendly, synergistically modified functional fiber for bedding, characterized in that, The water-resistant, skin-friendly, and synergistically modified bedding functional fiber comprises the following raw materials in parts by weight: 70-95 parts of matrix fiber material; 3-18 parts of biomimetic adhesion dynamic crosslinking ion-association modified polymer; 0.2-4 parts of organic small molecule functional regulator; 0.2-3 parts of polyether-modified silicone oil; 0.1-2 parts of fatty alcohol polyoxyethylene ether; 0.1-2 parts of glyoxal; 0.1-2 parts of citric acid; and 0.05-1 part of antioxidant 1010. The biomimetic adhesion dynamic crosslinking ion-association modified polymer is a composite functional polymer formed by the oxidative self-polymerization of dopamine hydrochloride to form a polydopamine adhesion matrix, and the dynamic crosslinking structure is constructed with protocatechuic aldehyde and polyethyleneimine through Schiff base reaction and Michael addition reaction. At the same time, a quaternary phosphonium salt modifier is introduced for further modification through ion association. The organic small molecule functional regulator is ergothioneine.

2. The water-resistant, skin-friendly, and synergistically modified functional fiber for bedding according to claim 1, characterized in that, The biomimetic adhesion dynamic crosslinking ion association modified polymer comprises the following raw materials in parts by weight: 0.5-5 parts dopamine hydrochloride, 0.3-4 parts protocatechuic aldehyde, 0.5-6 parts polyethyleneimine, and 0.2-3 parts quaternary phosphonium salt modifier.

3. The water-resistant, skin-friendly, synergistically modified functional fiber for bedding according to claim 1 or 2, characterized in that, The preparation method of the biomimetic adhesion dynamic crosslinking ion association modified polymer includes the following steps: (1) Dopamine hydrochloride was subjected to oxidative self-polymerization to obtain a prepolymer system containing polydopamine; (2) Protocatechuic aldehyde and polyethyleneimine were added to the prepolymer system to react and construct a dynamic cross-linked network structure; (3) Add quaternary phosphonium salt modifier to the dynamic cross-linked network structure and react to obtain a biomimetic adhesion dynamic cross-linked ion association modified polymer.

4. The water-resistant, skin-friendly, synergistically modified bedding functional fiber according to claim 3, characterized in that, The reaction conditions for step (1) are as follows: dopamine hydrochloride is prepared into a solution with a concentration of 1-5 g / L, the pH is adjusted to 8.5-8.8 in a 10 mmol / L Tris buffer solution, and the reaction is carried out at 25-35°C and 200-500 rpm for 2-3 hours.

5. The water-resistant, skin-friendly, synergistically modified functional fiber for bedding according to claim 3, characterized in that, The reaction conditions for step (2) are as follows: the mass ratio of protocatechuic aldehyde to polyethyleneimine is 1:(1-3), and the reaction is carried out at 30-50℃ and stirred at 300-600 rpm for 3-5 hours.

6. The water-resistant, skin-friendly, synergistically modified bedding functional fiber according to claim 3, characterized in that, The reaction conditions for step (3) are as follows: the amount of quaternary phosphonium salt modifier added is 1 to 10% of the mass of the system obtained in step (2), and the reaction is carried out at 45 to 65°C and stirred at 200 to 500 rpm for 1.5 to 2.5 hours.

7. A method for preparing a water-resistant, skin-friendly, synergistically modified functional fiber for bedding, characterized in that, The preparation method includes the following steps: S1, after pretreating the matrix fiber material, add biomimetic adhesion dynamic cross-linking ion association modified polymer and organic small molecule functional regulator for impregnation treatment to obtain preliminary modified fiber; S2, polyether-modified silicone oil, fatty alcohol polyoxyethylene ether, glyoxal, citric acid and antioxidant 1010 are added to the pre-modified fiber for finishing treatment, so that the components are further distributed on the fiber surface and have a synergistic effect. S3 involves drying and heat-treating the fibers to obtain water-resistant, skin-friendly, and synergistically modified functional fibers for bedding.

8. The method for preparing a water-resistant, skin-friendly, synergistically modified bedding functional fiber according to claim 7, characterized in that, The reaction conditions for step S1 are as follows: the matrix fiber material is added to the impregnation solution at a bath ratio of 1:20 to 1:50, the concentration of the biomimetic adhesion dynamic crosslinking ion association modified polymer in the impregnation solution is 1 to 10 g / L, the concentration of the organic small molecule functional regulator is 0.5 to 5 g / L, and the impregnation is carried out at 30 to 60°C and 100 to 300 rpm for 30 to 90 min.

9. The method for preparing a water-resistant, skin-friendly, synergistically modified functional fiber for bedding according to claim 7, characterized in that, The reaction conditions for step S2 are as follows: the concentration of polyether-modified silicone oil in the finishing solution is 1-5 g / L, the concentration of fatty alcohol polyoxyethylene ether is 0.5-3 g / L, the concentration of glyoxal is 0.5-3 g / L, the concentration of citric acid is 0.5-3 g / L, and the concentration of antioxidant 1010 is 0.1-1 g / L. The solution is subjected to padding treatment at 40-70°C, and the padding rate is 60%-100%.

10. The method for preparing a water-resistant, skin-friendly, synergistically modified functional fiber for bedding according to claim 7, characterized in that, The reaction conditions for step S3 are: first, drying at 80-100℃ for 10-30 minutes, and then heat treatment at 120-150℃ for 2-10 minutes.

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