Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of high-strength and high-toughness bionic fiber

A fiber and high-strength technology, which is applied in the field of preparation of high-strength and high-toughness bionic fibers, can solve the problems of difficulty in effectively improving the strength and toughness of polyurethane fibers, weak interfacial force, and deterioration of mechanical properties, achieving high practical application value and increasing interfacial interaction. Powerful and controllable effects

Active Publication Date: 2022-07-05
WUHAN TEXTILE UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the method provided by this patent can improve the strength of polyurethane fibers to a certain extent, the interfacial force between polyurethane and cellulose nanofibrils is still relatively weak, and it is easy to form a skin-core structure in the wet spinning process , deteriorating its mechanical properties; and the interface structure between polyurethane and cellulose nanofibrils prepared by this method is relatively simple, it is difficult to effectively improve the strength and toughness of polyurethane fibers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of high-strength and high-toughness bionic fiber
  • Preparation method of high-strength and high-toughness bionic fiber
  • Preparation method of high-strength and high-toughness bionic fiber

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The invention provides a preparation method of high-strength and high-toughness bionic fiber, comprising the following steps:

[0033]S1. Use a silane coupling agent to modify the surface of the nanocellulose whiskers, then add the modified nanocellulose whiskers into dimethyl sulfoxide, fully disperse and then add thermoplastic polyurethane to form a cast film after fully dissolving liquid;

[0034] S2, drying the film-coating solution obtained in step S1 to obtain a composite film;

[0035] S3, placing the composite membrane obtained in step S2 in a ternary solvent mixed with dimethyl sulfoxide, N,N-dimethylformamide and toluene, and fully dissolving to form a spinning dope; adopt a wet method Spinning technology, the spinning thin stream formed after the spinning stock solution passes through the spinneret enters the coagulation bath, and is coagulated and formed into primary fibers under a predetermined drafting multiple;

[0036] S4. The nascent fibers obtained i...

Embodiment 1

[0045] The present embodiment provides a method for preparing high-strength and high-toughness bionic fibers, comprising the following steps:

[0046] S1. Preparation of casting liquid

[0047] After mixing absolute ethanol and water according to the mass ratio of 8:2, add the silane coupling agent γ-aminopropyltrimethoxysilane, adjust the pH to 4.0, and stir at room temperature for 30 minutes to obtain the mass of the silane coupling agent. Fraction of 3% hydrolyzate. Then add nanocellulose whiskers with a length of 200nm and a diameter of 12nm to the hydrolyzate according to the mass ratio of nanocellulose to hydrolyzate 3:100, stir at room temperature for 3h, wash with absolute ethanol, and dry to obtain a modified Post-sexualized nanocellulose whiskers.

[0048] Then, the modified nanocellulose whiskers are added into dimethyl sulfoxide, mechanically stirred, and then ultrasonically dispersed to make them fully dispersed; then thermoplastic polyurethane is added, and aft...

Embodiment 2～9

[0057] Embodiments 2 to 9 respectively provide a preparation method of high-strength and high-toughness bionic fibers. Compared with embodiment 1, the difference is that the process parameters of the preparation process are changed. The specific parameters corresponding to each embodiment are shown in Table 1. , the remaining steps and parameters are the same as those in Embodiment 1, and are not repeated here.

[0058] The process parameters of table 1 embodiment 2~9

[0059]

[0060] After testing the properties of the high-strength and high-toughness biomimetic fibers prepared in Examples 2 to 9, compared with Example 1, the results of the relative increase in mechanics are shown in Table 2.

[0061] Table 2 Performance parameters of high-strength and high-toughness biomimetic fibers prepared in Examples 2-9

[0062]

[0063]

[0064] It can be seen from Table 2 that the adjustment of the process parameters in the preparation process will affect the performance of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a high-strength and high-toughness bionic fiber. According to the method, a wet spinning forming process principle is utilized, polyurethane and nano-cellulose whiskers are adopted as main raw materials, the nano-cellulose whiskers are subjected to surface modification, then the modified nano-cellulose whiskers and polyurethane are prepared into a membrane casting solution, the obtained composite membrane is dissolved in a ternary solvent after membrane forming, and the composite membrane is prepared. The preparation method comprises the following steps: preparing nascent fibers by adopting a wet spinning process, then carrying out drafting and spiral orientation treatment in a thermal environment, and carrying out heating shaping, winding and drying treatment to obtain the high-strength and high-toughness bionic fibers. Through the mode, the polyurethane molecular chain can be folded and wound on the nano-cellulose whisker to form a multi-stage interface structure similar to natural spider silk and silk, and the interface compatibility and the acting force between the polyurethane and the nano-cellulose whisker are effectively improved; therefore, the bionic fiber which is compact in structure and has high strength and high toughness is prepared.

Description

technical field [0001] The invention relates to the technical field of preparation of lightweight and high-strength nanomaterials, in particular to a preparation method of high-strength and high-toughness bionic fibers. Background technique [0002] Polyurethane is a block polymer composed of alternating soft and hard segments. The soft segment is in a high elastic state at room temperature and can produce large tensile deformation, while the hard segment provides nodes for the elongation and deformation of the soft segment. . Based on the special mechanical, physical, biological and chemical properties of polyurethane materials, polyurethane and its composites show good overall strength, elongation at break and resilience, and have been widely used in textile and related industries, such as : National defense, transportation, medical care, sports and energy, etc., occupy a very important position in the national economy. How to further improve the mechanical properties of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/02D01F8/16D01D1/02D01D5/06D01D5/12D01D10/02
CPCD01F8/02D01F8/16D01D1/02D01D5/06D01D5/12D01D10/02Y02P70/62
Inventor 张春华孙雪楠夏良君张佳婧刘欣徐卫林
Owner WUHAN TEXTILE UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com