Preparation method of pH, temperature and heart rate monitoring multifunctional flexible response clothing shoulder strap

Abstract

The invention discloses a preparation method of a pH, temperature and heart rate monitoring multifunctional flexible response garment shoulder strap, which comprises the following steps: respectively preparing a base material spinning solution, liquid platinum metal and a polyvinylidene fluoride spinning solution containing functional particles, compounding the base material spinning solution, the liquid platinum metal and the polyvinylidene fluoride spinning solution through wet spinning to form nascent fibers, and then performing post-treatment to obtain the multifunctional flexible response garment shoulder strap. Integrating the sensor and manufacturing the shoulder strap to obtain a final finished product. According to the garment shoulder strap, modal and spandex are used as base materials, and a fiber structure prepared through a wet spinning process is combined, so that the shoulder strap has good flexibility and elasticity, fits the curve of a human body and is comfortable to wear. According to the clothing shoulder strap, through the synergistic effect of the nano polyaniline particles, the liquid metal platinum and the polyvinylidene fluoride, the sensor is sensitive in response to changes of environment and physiological signals, and small changes can be rapidly and accurately detected. The fiber structure obtained through spinning and a sensor integration mode are adopted, so that the performance stability of the shoulder strap in the long-term use process is guaranteed, and the product reliability is improved.

Description

Technical Field

[0001] This invention belongs to the field of smart wearable device technology, specifically relating to a method and product for preparing a multifunctional flexible responsive clothing shoulder strap that monitors pH, temperature and heart rate. Background Technology

[0002] With people's increasing demands for health and quality of life, smart wearable devices have gradually become a research hotspot. As an important component close to the human body, clothing shoulder straps, equipped with the ability to monitor physiological parameters and surrounding environmental parameters, will greatly enhance user experience and provide convenience for health management. Currently, existing clothing shoulder straps have relatively limited functionality, unable to accurately monitor pH, temperature, and heart rate simultaneously, and lack flexibility and responsiveness, failing to meet people's growing needs. Therefore, developing a multifunctional, flexible, and responsive clothing shoulder strap is of significant practical importance. Summary of the Invention

[0003] Purpose of the invention: To address the shortcomings of existing technologies, this invention provides a method for preparing a multifunctional flexible responsive garment shoulder strap that monitors pH, temperature, and heart rate. Through specific material selection and wet spinning processes, a garment shoulder strap with excellent performance is prepared, enabling accurate monitoring of human sweat pH, body temperature, and heart rate during exercise, while ensuring the flexibility and comfort of the shoulder strap.

[0004] Technical Solution: A method for preparing a multifunctional flexible responsive garment shoulder strap for pH, temperature, and heart rate monitoring. The method involves preparing a substrate spinning solution, liquid platinum metal, and a polyvinylidene fluoride spinning solution containing functional particles. These are then combined using a wet spinning process to form nascent fibers. Post-processing is performed, and the sensors are integrated into the shoulder strap fabrication to obtain the final product. The method includes the following steps: S1. Preparation of substrate spinning solution: Add the mixed fibers containing modal and spandex to a specific solvent, stir and dissolve to form a uniform substrate spinning solution; Modal has a soft feel, good moisture absorption and strength, while spandex gives the fiber excellent elasticity. The combination of the two can ensure that the shoulder strap fits the human body while having good elasticity.

[0005] S2. Preparation of nano-polyaniline particles: Nano-polyaniline particles are prepared by chemical oxidative polymerization. Aniline monomers are dissolved in hydrochloric acid solution, and ammonium persulfate is added as an oxidant. The reaction is carried out at low temperature to obtain nano-polyaniline particles. These particles are then centrifuged, washed, and dried for later use. Among them, polyaniline in nano-polyaniline particles has unique redox properties and electrical conductivity. The nano-sized particles can increase the specific surface area and improve its sensitivity to environmental changes. It has good sensitivity and responsiveness to pH changes and can accurately monitor the pH value of human skin surface.

[0006] S3. Preparation of PVDF spinning solution containing functional particles: Prepared nano-polyaniline particles, liquid platinum, and polyvinylidene fluoride (PVDF) are added to an appropriate amount of dispersant in a certain proportion. The mixture is then uniformly dispersed in an organic solvent using ultrasonic dispersion to obtain a PVDF spinning solution containing functional particles. The liquid platinum exhibits good catalytic activity and stability, enabling rapid and accurate sensing of temperature changes. PVDF possesses good chemical stability, mechanical properties, and piezoelectric properties, allowing it to convert the subtle pressure changes generated by heartbeats into electrical signals, thus achieving effective heart rate monitoring.

[0007] S4. Wet spinning: Using wet spinning technology, the two spinning solutions mentioned above are simultaneously extruded into a coagulation bath through a dual-nozzle or coaxial nozzle. In the coagulation bath, the solvent and coagulant undergo dual diffusion, causing the polymer solution to gradually solidify into fibers. The substrate formed by modal and spandex fibers intertwines and combines with PVDF fibers containing functional particles to form nascent fibers with a special structure.

[0008] S5. Post-treatment: The post-treatment process involves stretching, washing, and drying the nascent fibers to further improve their strength and stability, adjust their microstructure, and optimize their performance. The post-treated fibers are then woven or knitted to form the main structure of the garment shoulder straps. S6. Sensor Integration and Shoulder Strap Manufacturing: The pre-made functional fibers are woven using a machine weaving process to enhance the dimensional stability of the shoulder strap. At the same time, a signal transmission module and processing chip are integrated into the shoulder strap. The signals collected by various sensors are amplified and filtered, and then transmitted to the smart terminal device of the mobile phone via Bluetooth wireless communication, so that users can view and analyze the data in real time.

[0009] As a further improvement to the embodiment of the present invention, the mass ratio of modal to spandex is 1:1 to 3:1.

[0010] As a further improvement to the embodiment of the present invention, the mass ratio of the nano-polyaniline particles, liquid platinum metal and polyvinylidene fluoride is 1:5-10:40-50.

[0011] As a further improvement to the embodiment of the present invention, the wet spinning process uses a dual-nozzle or coaxial nozzle, the coagulation bath is deionized water, and the coagulation time is 3-8 minutes.

[0012] As a further improvement to the embodiments of the present invention, the post-processing includes stretching, washing and drying, with a stretching ratio of 2-4 times and a drying temperature of 50-70°C.

[0013] As a further improvement to the embodiment of the present invention, the signal transmission module integrated in the shoulder strap includes, from top to bottom, a communication module layer, a power module layer, a signal processing module layer, a substrate, and a sensing module layer.

[0014] A multifunctional flexible responsive garment shoulder strap product for monitoring pH, temperature and heart rate was prepared according to a method for preparing a multifunctional flexible responsive garment shoulder strap for monitoring pH, temperature and heart rate.

[0015] Beneficial effects: The specific advantages of this invention are as follows: (1) Multifunctional monitoring: The garment shoulder strap prepared by the present invention can simultaneously and accurately monitor pH, temperature and heart rate, providing users with comprehensive health and environmental information. (2) Flexibility and comfort: The shoulder straps of the garment of the present invention are made of modal and spandex as base materials, combined with the fiber structure prepared by wet spinning process, so that the shoulder straps have good flexibility and elasticity, fit the curve of the human body, and are comfortable to wear. (3) Sensitive response: The shoulder strap of the garment of the present invention, through the synergistic effect of nano-polyaniline particles, liquid metal platinum and polyvinylidene fluoride, makes the sensor sensitive to changes in environmental and physiological signals, and can quickly and accurately detect minute changes.

[0016] (4) High stability: The shoulder strap of the present invention is made of fiber structure obtained by spinning and adopts a carefully designed sensor integration method, which ensures the performance stability of the shoulder strap during long-term use and improves the reliability of the product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the shoulder strap manufacturing structure of the present invention; wherein: 1, communication module layer; 2, power module layer; 3, signal processing module layer; 4, substrate and sensing module layer.

[0018] Figure 2 This is a scanning electron microscope (SEM) schematic diagram of wet-spun fibers according to Embodiment 3 of the present invention. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below, so that those skilled in the art can better understand the advantages and features of the present invention, thereby making a clearer definition of the scope of protection of the present invention. The embodiments described in this invention are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example 1 A method for preparing a multifunctional flexible responsive garment shoulder strap for monitoring pH, temperature, and heart rate includes the following steps: S1. Preparation of substrate spinning solution: Change the mass ratio of modal and spandex to 1:1, add the mixed fibers to a reactor containing a specific solvent: N,N-dimethylacetamide, and stir to dissolve at 80°C to form a spinning solution with a mass fraction of 15%.

[0021] S2. Preparation of nano-polyaniline particles: Nano-polyaniline particles were prepared by chemical oxidative polymerization. Aniline monomers were dissolved in hydrochloric acid solution, and ammonium persulfate was added as an oxidant. The reaction was carried out at a low temperature of 0-5℃ to obtain nano-polyaniline particles, which were then centrifuged, washed, and dried for later use.

[0022] S3. Preparation of PVDF spinning solution containing functional particles: Adjust the mass ratio of nano-polyaniline particles, liquid metal platinum and polyvinylidene fluoride to 1:6:40 to prepare PVDF spinning solution containing functional particles.

[0023] S4. Wet spinning: Spinning is carried out using a coaxial nozzle. The substrate spinning solution is used as the inner layer, and the PVDF spinning solution containing functional particles is used as the outer layer. The solution is extruded into a coagulation bath. The temperature of the coagulation bath is adjusted to 25℃ and the coagulation time is 8 minutes to form nascent fibers.

[0024] S5. Post-treatment: The nascent fibers are stretched to a stretch ratio of 4, washed three times with deionized water to remove residual solvent and impurities from the surface, and finally dried at 60°C for 12 hours to obtain fibers with a composite structure. S6. Sensor Integration and Shoulder Strap Manufacturing: The pre-fabricated functional fibers are woven using a machine weaving process to enhance the dimensional stability of the shoulder strap. Simultaneously, a signal transmission module and processing chip are integrated into the shoulder strap. Signals collected by various sensors are amplified, filtered, and then transmitted to a smartphone via Bluetooth wireless communication, allowing users to view and analyze data in real time. The integrated signal transmission module in the shoulder strap comprises, from top to bottom: communication module layer 1, power module layer 2, signal processing module layer 3, and substrate and sensing module layer 4.

[0025] The performance tests of the garment shoulder straps in this embodiment are as follows: (1) pH monitoring performance: In the pH range of 3-11, the linear correlation coefficient between the sensor output signal and the pH value is higher, and the detection accuracy can reach ±0.05pH. (2) Temperature monitoring performance: The temperature measurement error does not exceed ±0.3℃ in the temperature range of -10℃ to 50℃.

[0026] (3) Heart rate monitoring performance: After simulation testing, the accuracy of heart rate measurement by the shoulder strap has been further improved, with an error of within ±3 beats / minute. Example 2 A method for preparing a multifunctional flexible responsive garment shoulder strap for monitoring pH, temperature, and heart rate includes the following steps: S1. Preparation of the substrate spinning solution: Weigh a certain amount of modal fiber and spandex fiber, and mix them at a mass ratio of 3:1. Add the mixed fibers to a reactor containing a specific solvent: N,N-dimethylacetamide, and stir to dissolve at 80°C to form a spinning solution with a mass fraction of 15%.

[0027] S2. Preparation of Nano-Polyaniline Particles: Nano-polyaniline particles were prepared using a chemical oxidative polymerization method. Aniline monomers were dissolved in hydrochloric acid solution, and ammonium persulfate was added as an oxidant. The reaction was carried out at a low temperature of 0-5℃ to obtain nano-polyaniline particles. These particles were then centrifuged, washed, and dried for later use. S3. Preparation of PVDF spinning solution containing functional particles: Weigh appropriate amounts of liquid platinum and polyvinylidene fluoride powder, add them to N,N-dimethylformamide solvent in a mass ratio of 1:10:50, and add 0.5% of dispersant: polyvinylpyrrolidone. Disperse by ultrasonication for 30 min to obtain a uniform PVDF spinning solution containing functional particles. S4. Wet spinning: The two spinning solutions described above are loaded into a dual-nozzle spinning device, and the nozzle parameters are adjusted to ensure that the two solutions are extruded at the same flow rate. The extruded solution streams enter a coagulation bath containing a coagulant: deionized water. After a 5-minute coagulation process in the coagulation bath, nascent fibers are formed. S5. Post-treatment: The nascent fibers are removed from the coagulation bath and stretched to a ratio of 3. Then, the fibers are washed three times with deionized water to remove residual solvent and impurities from the surface. Finally, they are dried at 60°C for 12 hours to obtain fibers with a composite structure.

[0028] S6. Sensor Integration and Shoulder Strap Fabrication: The fiber containing the sensor is knitted into a garment shoulder strap. A micro signal transmission module and a processing chip are integrated into the shoulder strap to complete the fabrication of a multifunctional flexible responsive garment shoulder strap. The specific conditions are the same as in Example 1.

[0029] The performance tests of the garment shoulder straps in this embodiment are as follows: (1) pH monitoring performance: The prepared shoulder strap was immersed in buffer solutions with different pH values, and the changes in the electrical signal output by the pH sensor were detected by connecting an external test circuit. The results showed that the sensor output signal had a good linear relationship with the pH value in the pH range of 2-12, and the detection accuracy could reach ±0.1 pH.

[0030] (2) Temperature monitoring performance: The shoulder strap was placed in environments with different temperatures, and the temperature change was calculated by measuring the electrical signal output by the temperature sensor. The test results showed that the sensor could accurately measure the temperature within the temperature range of -20℃ to 60℃, with an error of no more than ±0.5℃. (3) Heart rate monitoring performance: After simulation testing, the collected electrocardiogram signals were transmitted to a mobile APP for analysis via the signal transmission module. Compared with professional heart rate monitoring equipment, the heart rate data measured by the shoulder strap prepared in this invention has an error within ±2 beats / minute, which has high accuracy. Example 3 A method for preparing a multifunctional flexible responsive garment shoulder strap for monitoring pH, temperature, and heart rate includes the following steps: S1. Preparation of nano-polyaniline particles: Weigh a certain amount of modal fiber and spandex fiber, and mix them at a mass ratio of 2:1. Add the mixed fibers to a reactor containing a specific solvent: N,N-dimethylacetamide, and stir to dissolve at 80°C to form a spinning solution with a mass fraction of 15%.

[0031] S2. Preparation of substrate spinning solution: Change the mass ratio of modal and spandex to 2:1, and keep other conditions the same as in Example 1 to prepare substrate spinning solution.

[0032] S3. Preparation of PVDF spinning solution containing functional particles: Adjust the mass ratio of nano-polyaniline particles, liquid metal platinum and polyvinylidene fluoride to 1:8:45 to prepare PVDF spinning solution containing functional particles. S4. Wet spinning: Spinning is performed using a coaxial nozzle. The substrate spinning solution is used as the inner layer, and the PVDF spinning solution containing functional particles is used as the outer layer. The mixture is then extruded into a coagulation bath. The coagulation bath temperature is adjusted to 25℃, and the coagulation time is 8 minutes to form nascent fibers. S5. Post-treatment: Remove the nascent fibers from the coagulation bath and perform stretching treatment. The stretching ratio is adjusted to 4 times. Other post-treatment conditions are the same as in Example 1. S6. Sensor integration and shoulder strap manufacturing: The manufactured functional fibers are woven using a weaving process to enhance the strength and durability of the shoulder strap, under the same conditions as in Example 1. The performance tests of the garment shoulder straps in this embodiment are as follows: (1) pH monitoring performance: In the pH range of 3-11, the linear correlation coefficient between the sensor output signal and the pH value is higher, and the detection accuracy can reach ±0.05pH. (2) Temperature monitoring performance: The temperature measurement error does not exceed ±0.3℃ in the temperature range of -30℃ to 70℃.

[0033] (3) Heart rate monitoring performance: After simulation testing, the accuracy of heart rate measurement by the shoulder strap has been further improved, with an error of within ±1 beat / minute.

[0034] The specific experimental data for the performance tests of the garment shoulder straps of Embodiments 1-3 of the present invention are shown in the table below: Table 1 Shoulder strap related performance tests

[0035] As can be seen from Table 1 above, the multifunctional flexible responsive garment shoulder straps for pH, temperature and heart rate monitoring prepared in Examples 1-3 can achieve good pH, temperature and heart rate monitoring functions.

[0036] The above embodiments are only some implementations of the present invention. In actual applications, the material ratio, process parameters, etc. can be adjusted and optimized according to specific needs, and all such adjustments should fall within the protection scope of the present invention.

Claims

1. A method for preparing a multifunctional flexible responsive garment shoulder strap that monitors pH, temperature, and heart rate, characterized in that: Substrate spinning solution, liquid platinum metal and polyvinylidene fluoride spinning solution containing functional particles were prepared separately. The two were combined by wet spinning to form nascent fibers, which were then post-processed, and the sensor was integrated into the shoulder strap to obtain the final product. Includes the following steps: S1. Preparation of substrate spinning solution: Add the mixed fibers containing modal and spandex to a specific solvent, stir to dissolve, and form a uniform substrate spinning solution. S2. Preparation of nano-polyaniline particles: Nano-polyaniline particles are prepared by chemical oxidative polymerization. Aniline monomers are dissolved in hydrochloric acid solution, and ammonium persulfate is added as an oxidant. The reaction is carried out at low temperature to obtain nano-polyaniline particles. After centrifugation, washing, and drying, they are ready for use. S3. Preparation of PVDF spinning solution containing functional particles: Add the prepared nano-polyaniline particles, liquid metal platinum and polyvinylidene fluoride to an appropriate amount of dispersant in a certain proportion, and disperse them evenly in an organic solvent by ultrasonic dispersion to obtain PVDF spinning solution containing functional particles. S4. Wet spinning: Using wet spinning technology, the two spinning solutions mentioned above are simultaneously extruded into the coagulation bath through a dual-nozzle or coaxial nozzle. In the coagulation bath, the solvent and coagulant undergo dual diffusion, causing the polymer solution to gradually solidify into fibers. The substrate formed by modal and spandex fibers intertwines and combines with PVDF fibers containing functional particles to form nascent fibers with a special structure. S5. Post-treatment: The post-treatment process of stretching, washing and drying the nascent fibers further improves the strength and stability of the fibers, adjusts the microstructure of the fibers, and optimizes their performance. The fibers after post-treatment are then woven or knitted to make the main structure of the garment shoulder straps. S6. Sensor Integration and Shoulder Strap Manufacturing: The pre-made functional fibers are woven using a machine weaving process to enhance the dimensional stability of the shoulder strap. At the same time, a signal transmission module and processing chip are integrated into the shoulder strap. The signals collected by various sensors are amplified and filtered, and then transmitted to the smart terminal device of the mobile phone via Bluetooth wireless communication, so that users can view and analyze the data in real time.

2. The method for preparing the multifunctional flexible responsive garment shoulder strap for pH, temperature, and heart rate monitoring according to claim 1, characterized in that: The mass ratio of modal to spandex is 1:1 to 3:

1.

3. The method for preparing the multifunctional flexible responsive garment shoulder strap for pH, temperature, and heart rate monitoring according to claim 1, characterized in that: The mass ratio of the nano-polyaniline particles, liquid platinum metal, and polyvinylidene fluoride is 1:5-10:40-50.

4. The method for preparing the multifunctional flexible responsive garment shoulder strap for pH, temperature, and heart rate monitoring according to claim 1, characterized in that: The wet spinning process uses a dual-nozzle or coaxial nozzle, the coagulation bath is deionized water, and the coagulation time is 3-8 minutes.

5. The method for preparing the multifunctional flexible responsive garment shoulder strap for pH, temperature, and heart rate monitoring according to claim 1, characterized in that: The post-processing includes stretching, washing, and drying, with a stretching ratio of 2-4 times and a drying temperature of 50-70℃.

6. The method for preparing the multifunctional flexible responsive garment shoulder strap for pH, temperature, and heart rate monitoring according to claim 1, characterized in that: The integrated signal transmission module in the shoulder strap includes, from top to bottom, a communication module layer, a power module layer, a signal processing module layer, a substrate, and a sensing module layer.

7. A multifunctional flexible responsive garment shoulder strap product for monitoring pH, temperature and heart rate, prepared by the preparation method according to any one of claims 1-6.

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