A kind of multi-scale helical structure fiber bundle and preparation method thereof

Abstract

The invention discloses a multi-scale helical structure fiber bundle and a preparation method thereof. Through an electrospinning technique and a twisting and multistrand overtwist method, the preparation method of the multi-scale helical structure fiber bundle succeeds in preparing a series of multi-scale helical structure fiber bundles. The multi-scale helical structure fiber bundles can compound varied materials and integrate varied functions and have excellent intensity, flexibility, stretchability and resilience. Moreover, the diameter and length of the fiber bundles can be controlled, and the fiber bundles can be randomly bent and weaved and have broad application.

Description

technical field

[0001] The invention belongs to the field of chemical engineering, and in particular relates to a multi-scale helical structure fiber bundle and a preparation method thereof. Background technique

[0002] Due to the high specific surface area, high flexibility and high stretchability endowed by its structure, the helical fiber bundle has a wide range of applications in artificial muscles, sensors, smart drives and wearable fabrics, so it has become more and more popular in recent years. received people's attention. (Reference 1: Liu Z F, Fang S, Moura F A, et al. Hierarchically buckledsheath-core fibers for super elastic electronics, sensors, and muscles. Science, 2015, 349:400.). At present, the structure and material of the helical fiber bundle obtained are relatively simple, mainly a single twisted fiber bundle with carbon nanotubes as the raw material, so a construction method suitable for various materials and other types of helical fiber bundles are ex...

Examples

Embodiment 1

[0034] Prepare the PCL precursor solution, the solvent is tetrahydrofuran (THF) and N,N dimethylformamide (DMF) with a mass ratio of 1:1, the solution mass percentage concentration is 15%, use a stainless steel drum as a receiver, and use 100turns / Electrospinning at a speed of 10 min, the working voltage is 15kV, the spinning distance is 15cm, after 20 minutes, an oriented fiber membrane is obtained, and the diameter of a single fiber is 200nm; then the fiber membrane is cut into a length of 5cm and a width of 1cm along the direction parallel to the orientation The two ends of the fiber strip are respectively fixed on the translation platform and the stepping motor for twisting to obtain the primary twisted fiber bundle. The speed of the stepping motor is 120 turns / min, and the twisting time is 1s; figure 1 As shown, the 2 strands of primary twisted fiber bundles are fixed between the translation table and the stepping motor, and over-twisting is carried out. After twisting, ...

Embodiment 2

[0036] Prepare the PVP precursor solution, the solvent is water, the solution mass percentage concentration is 10%, the stainless steel drum is used as the receiver, and the electrospinning is carried out at a speed of 2000 turns / min, the working voltage is 10kV, the spinning distance is 20cm, after 2 minutes Obtain an oriented fiber film, the diameter of a single fiber is 1 μm; then cut the fiber film into a 500 cm wide and 50 cm long fiber strip along the direction parallel to the orientation, and fix the two ends of the fiber strip on a translation platform and a stepping motor respectively. Twisting to obtain primary twisted fiber bundles, the speed of the stepping motor is 1000 turns / min, and the twisting time is 10s; finally 50 strands of primary twisted fiber bundles are fixed on the translation table and the stepping motor, and over-twisted and over-twisted When twisting, the speed of the stepping motor is 50 turns / min, and the forward speed of the motor is 1 cm / min. Af...

Embodiment 3

[0038] Prepare the PU precursor solution, the solvent is tetrahydrofuran (THF) and N, N dimethylformamide (DMF) with a mass ratio of 1:1, the solution mass percentage concentration is 8%, use a stainless steel drum as a receiver, and use 200turns / Electrospinning was carried out at a speed of 1 min, the working voltage was 12kV, and the spinning distance was 15cm. After 240 minutes, an oriented fiber membrane was obtained, and the diameter of a single fiber was 50nm; For fiber strips, the two ends of the fiber strips are respectively fixed on the translation platform and the stepping motor for twisting to obtain primary twisted fiber bundles. The morphology of the primary twisted fiber bundles is as follows: figure 2As shown, the speed of the stepping motor is 10 turns / min, and the twisting time is 30s; finally, 100 primary twisted fiber bundles are fixed on the translation table and the stepping motor, and over-twisting is carried out. The rotation speed is 500 turns / min, an...

technical field

[0001] The invention belongs to the field of chemical engineering, and in particular relates to a multi-scale helical structure fiber bundle and a preparation method thereof. Background technique

[0002] Due to the high specific surface area, high flexibility and high stretchability endowed by its structure, the helical fiber bundle has a wide range of applications in artificial muscles, sensors, smart drives and wearable fabrics, so it has become more and more popular in recent years. received people's attention. (Reference 1: Liu Z F, Fang S, Moura F A, et al. Hierarchically buckledsheath-core fibers for super elastic electronics, sensors, and muscles. Science, 2015, 349:400.). At present, the structure and material of the helical fiber bundle obtained are relatively simple, mainly a single twisted fiber bundle with carbon nanotubes as the raw material, so a construction method suitable for various materials and other types of helical fiber bundles are ex...

Examples

Embodiment 1

[0034] Prepare the PCL precursor solution, the solvent is tetrahydrofuran (THF) and N,N dimethylformamide (DMF) with a mass ratio of 1:1, the solution mass percentage concentration is 15%, use a stainless steel drum as a receiver, and use 100turns / Electrospinning at a speed of 10 min, the working voltage is 15kV, the spinning distance is 15cm, after 20 minutes, an oriented fiber membrane is obtained, and the diameter of a single fiber is 200nm; then the fiber membrane is cut into a length of 5cm and a width of 1cm along the direction parallel to the orientation The two ends of the fiber strip are respectively fixed on the translation platform and the stepping motor for twisting to obtain the primary twisted fiber bundle. The speed of the stepping motor is 120 turns / min, and the twisting time is 1s; figure 1 As shown, the 2 strands of primary twisted fiber bundles are fixed between the translation table and the stepping motor, and over-twisting is carried out. After twisting, ...

Embodiment 2

[0036] Prepare the PVP precursor solution, the solvent is water, the solution mass percentage concentration is 10%, the stainless steel drum is used as the receiver, and the electrospinning is carried out at a speed of 2000 turns / min, the working voltage is 10kV, the spinning distance is 20cm, after 2 minutes Obtain an oriented fiber film, the diameter of a single fiber is 1 μm; then cut the fiber film into a 500 cm wide and 50 cm long fiber strip along the direction parallel to the orientation, and fix the two ends of the fiber strip on a translation platform and a stepping motor respectively. Twisting to obtain primary twisted fiber bundles, the speed of the stepping motor is 1000 turns / min, and the twisting time is 10s; finally 50 strands of primary twisted fiber bundles are fixed on the translation table and the stepping motor, and over-twisted and over-twisted When twisting, the speed of the stepping motor is 50 turns / min, and the forward speed of the motor is 1 cm / min. Af...

Embodiment 3

[0038] Prepare the PU precursor solution, the solvent is tetrahydrofuran (THF) and N, N dimethylformamide (DMF) with a mass ratio of 1:1, the solution mass percentage concentration is 8%, use a stainless steel drum as a receiver, and use 200turns / Electrospinning was carried out at a speed of 1 min, the working voltage was 12kV, and the spinning distance was 15cm. After 240 minutes, an oriented fiber membrane was obtained, and the diameter of a single fiber was 50nm; For fiber strips, the two ends of the fiber strips are respectively fixed on the translation platform and the stepping motor for twisting to obtain primary twisted fiber bundles. The morphology of the primary twisted fiber bundles is as follows: figure 2As shown, the speed of the stepping motor is 10 turns / min, and the twisting time is 30s; finally, 100 primary twisted fiber bundles are fixed on the translation table and the stepping motor, and over-twisting is carried out. The rotation speed is 500 turns / min, an...

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