Cellulose nanofibril reinforced polyurethane fiber as well as preparation method and application thereof

A technology of polyurethane fibers and nanofibrils is applied in the direction of cellulose/protein conjugated rayon, rayon manufacturing, fiber chemical characteristics, etc., which can solve the problem of high energy consumption, large macroscopic size of fiber raw materials, and small nanowhisker size and other problems, to achieve the effects of high specific surface area, improved dyeability, and high adsorption characteristics

Active Publication Date: 2018-05-29
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent application with the application number 2012101754401 discloses a fiber-reinforced polyurethane composite material and its preparation method and application, which are used in the automobile manufacturing industry. However, the inventive method uses a melting method to prepare composite panels, which has complicated processes, high energy consumption, and The macroscopic size of the fiber raw materials used is relatively large, and there is no disclosure of applications related to polyurethane fibers
The Chinese patent application with application number 031537065 discloses a layered nanocomposite reinforced spandex fiber material and a preparation method thereof. In this method, montmorillonite and talc raw materials are added to a polyurethane solution, and the tensile strength is 1.1 g / d, but the material needs to be modified. Organic treatment and intercalation composite technology, the operation process is complex
The Chinese patent application with the application number 2013101658127 discloses a preparation method of high-strength viscose fiber. The purpose of strengthening the viscose fiber is achieved by adding nano whiskers to the viscose liquid, but the size of the nano whiskers used is small and industrialized High cost, not conducive to large-scale industrial application
There is no report on the use of cellulose nanofibrils in polyurethane fiber reinforcement

Method used

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  • Cellulose nanofibril reinforced polyurethane fiber as well as preparation method and application thereof
  • Cellulose nanofibril reinforced polyurethane fiber as well as preparation method and application thereof
  • Cellulose nanofibril reinforced polyurethane fiber as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0055] The preparation method of cellulose nanofibril reinforced polyurethane fiber is as follows:

[0056] (1) Preparation of cellulose nanofibrils: mix the plant fiber raw material with the citric acid-sodium citrate buffer solution of pH=6 at a liquid ratio of 1:25g / ml, and add the fiber with a ratio of 30IU / g to the plant fiber raw material Sulfase (Novozymes company model is The cellulase of D) was shaken at 50°C for 18h to obtain a cellulose suspension, and after filtering and washing, the filtrate was inactivated at a high temperature of 90°C. The cellulose after the above treatment is microfibrillated and refined under a pressure of 1500 Bar to obtain a micro-nano cellulose slurry with a slurry concentration of 10 wt%, and then use a high-pressure micro-jet homogenizer to process it 5 times under a pressure of 28000 Bar to obtain a micro-nano cellulose slurry with a diameter of Cellulose nanofibrils of 15 nm and 1.5 μm in length.

[0057] (2) Dissolving thermoplasti...

Embodiment 2

[0061] The preparation method of cellulose nanofibril reinforced polyurethane fiber is as follows:

[0062] (1) Preparation of cellulose nanofibrils: mix the plant fiber raw material with the citric acid-sodium citrate buffer solution of pH=7 at a liquid ratio of 1:25g / ml, add the fiber with a ratio of 20IU / g to the plant fiber raw material Sulfase (Novozymes company model is The cellulase of D) was shaken at 50°C for 24h to obtain a cellulose suspension, and after filtering and washing, the filtrate was inactivated at a high temperature of 85°C. The cellulose after the above treatment was microfibrillated and refined under a pressure of 1300 Bar to obtain a micro-nano cellulose slurry with a slurry concentration of 0.1 wt%, and then processed 5 times with a high-pressure micro-jet homogenizer at a pressure of 25000 Bar to obtain a diameter Cellulose nanofibrils of 50 nm in length and 5 μm in length.

[0063] (2) Dissolving thermoplastic polyurethane in dimethylacetamide to...

Embodiment 3

[0067] The preparation method of cellulose nanofibril reinforced polyurethane fiber is as follows:

[0068] (1) Preparation of cellulose nanofibrils: mix the plant fiber raw material with the citric acid-sodium citrate buffer solution of pH=6 at a liquid ratio of 1:35g / ml, and add the fiber with a ratio of 30IU / g to the plant fiber raw material Sulfase (Novozymes company model is The cellulase of D) was shaken at 40°C for 20h to obtain a cellulose suspension, and after filtering and washing, the filtrate was inactivated at a high temperature of 90°C. The cellulose after the above treatment is microfibrillated and refined under a pressure of 1500 Bar to obtain a micro-nano cellulose slurry with a slurry concentration of 5 wt%, and then use a high-pressure micro-jet homogenizer to process it 6 times under a pressure of 30000 Bar to obtain a micro-nano cellulose slurry with a diameter of 25 nm cellulose nanofibrils with a length of 1 μm.

[0069] (2) Dissolving thermoplastic p...

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Abstract

The invention belongs to the field of polymer material processing, and particularly relates to a cellulose nanofibril reinforced polyurethane fiber as well as preparation method and application thereof. The preparation method of the cellulose nanofibril reinforced polyurethane fiber is divided into two steps that: in a first step, thermoplastic solid polyurethane is dissolved in a solvent, a certain concentration of a polyurethane solution is prepared, and cellulose nanofibrils are added to adjust mass ratio of the cellulose nanofibrils and the thermoplastic polyurethane, a polyurethane spinning solution is prepared after vacuum defoaming; in a second step, spinning, curing, draft matio and drying conditions are controlled, and the cellulose nanofibril reinforced polyurethane fiber is prepared by wet spinning. The the cellulose nanofibril reinforced polyurethane fiber not only has good elongation, but also greatly improves tensile strength, and resulting clothes are light and soft, comfortable to wear and have a good hand feeling.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to a cellulose nanofibril reinforced polyurethane fiber and a preparation method and application thereof. Background technique [0002] Polyurethane is a high molecular polymer in which soft segments formed by polyurethane bonds and hard segments formed by urea bonds alternately form soft and hard segments. Polyurethane has the beauty of "MSG-like" synthetic fiber materials. Since the beginning of the 21st century, polyurethane and its synthetic fibers have gradually occupied the market of nylon and acrylic in the clothing fabric industry due to their high strength, low modulus, high resilience and high elongation at break, especially in tights, Swimwear and lingerie industry. It is easy to spin 25-2500 denier filaments of different thicknesses, so it is widely used to make elastic braided fabrics, such as socks, furniture covers, ski clothing, sportswear, me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10D01F8/16D01F8/02
CPCD01F1/10D01F6/94D01F8/02D01F8/16
Inventor 王斌李文斌李金鹏陈克复曾劲松
Owner SOUTH CHINA UNIV OF TECH
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