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

A technology of nanofibrils and acrylic fibers, which is applied in the direction of cellulose/protein conjugated rayon, rayon manufacturing, fiber chemical characteristics, etc. It can solve the problem of small size of nano whiskers, high preparation cost, and unfavorable large-scale industrial application and other problems, to achieve the effect of strengthening acrylic fiber and improving hygroscopic performance

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

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Problems solved by technology

The Chinese patent application with the application number 2013101658127 discloses a method for preparing high-strength viscose fibers. The purpose of strengthening viscose fibers is achieved by adding nano-whiskers to the viscose liquid, but the size of the nano-whiskers used is small and industrialized. The preparation cost is relatively high, which is not conducive to large-scale industrial application

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of the acrylic fiber without adding is as follows:

[0043] (1) Polyacrylonitrile (PAN) was treated at 85°C for 30 minutes in an aqueous solution with a mass fraction of 1% sodium hydroxide and 95% ethanol, then washed with water until neutral, and dried at 105°C for 5 hours. The pretreated polyacrylonitrile was dissolved in dimethylformamide to prepare an acrylic fiber stock solution with a mass fraction of polyacrylonitrile of 10%. The acrylic fiber spinning solution was vacuum defoamed at -0.1MPa for 10h.

[0044] (2) the acrylic fiber spinning solution after the defoaming is spun on the spinning machine, and the massfraction that the sodium sulfate, zinc sulfate and sulfuric acid are formed is respectively 20%, 5% and 10% after the coagulation bath coagulation molding, adjusts the draft The stretching ratio is 5 times, and the acrylic fibers are collected after washing and drying.

Embodiment 2

[0046] The acrylic fiber reinforced by inorganic nanometer silicon carbide whiskers, its preparation method is as follows:

[0047] (1) Polyacrylonitrile (PAN) was treated at 85°C for 30 minutes in an aqueous solution with a mass fraction of 1% sodium hydroxide and 95% ethanol, then washed with water until neutral, and dried at 105°C for 5 hours. The pretreated polyacrylonitrile was dissolved in dimethylformamide to prepare an acrylic fiber stock solution with a mass fraction of polyacrylonitrile of 10%.

[0048] (2) Add inorganic nano-silicon carbide with a diameter of 20nm and a length of 800nm ​​into the acrylic fiber stock solution, so that the mass ratio of inorganic nano-silicon carbide and PAN reaches 1:100, and mix it to form an acrylic fiber spinning solution. The acrylic fiber spinning solution was vacuum defoamed at -0.1MPa for 10h.

[0049] (3) the acrylic fiber spinning solution after the defoaming is spun on the spinning machine, and the massfraction that sodium...

Embodiment 3

[0051] Nano cellulose whisker reinforced acrylic fiber, its preparation method is as follows:

[0052] (1) Polyacrylonitrile (PAN) was treated at 85°C for 30 minutes in an aqueous solution with a mass fraction of 1% sodium hydroxide and 95% ethanol, then washed with water until neutral, and dried at 105°C for 5 hours. The pretreated polyacrylonitrile was dissolved in dimethylformamide to prepare an acrylic fiber stock solution with a mass fraction of polyacrylonitrile of 15%.

[0053] (2) Add nanocellulose whiskers (NCC) with a diameter of 5nm and a length of 200nm into the acrylic fiber stock solution, so that the mass ratio of NCC and PAN reaches 1:100, and mix it to form an acrylic fiber spinning solution. The acrylic fiber spinning solution was vacuum defoamed at -0.1MPa for 10h.

[0054] (3) the acrylic fiber spinning solution after the defoaming is spun on the spinning machine, and the massfraction that sodium sulfate, zinc sulfate and sulfuric acid are formed is respec...

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Abstract

The invention belongs to the technical field of polymer molding and discloses a cellulose nanofibril reinforced acrylic fiber as well as a preparation method and application thereof. The preparation method of the cellulose nanofibril reinforced acrylic fiber is divided into two steps that: in a first step, polyacrylonitrile is pretreated and dissolved in a solvent as an acrylic fiber raw solution,and then the cellulose nanofibrils are added into the acrylic fiber raw solution, after dispersing evenly, a spinning solution is obtained; in a second step, the spinning solution is spun on a spinning machine, and after a coagulation bath, the spinning solution is drafted according to a certain drafting ratio, and then finally rolled and packaged. The cellulose nanofibril reinforced acrylic fiber not only has good tensile strength, but also has a great improvement in dyeing performance compared to a traditional acrylic fiber, and can be used for making fabrics such as blankets and carpets, as well as outdoor fabrics such as ski coats, sails, military canvas, tents and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer molding, and in particular relates to a cellulose nanofibril reinforced acrylic fiber and a preparation method and application thereof. Background technique [0002] Due to their unique physicochemical properties and characteristics, nanofibers have become widely studied and applied one-dimensional nanomaterials. Nanofibers can be divided into cellulose nanowhiskers and cellulose nanofibrils. Cellulose nanowhiskers are generally prepared by acid hydrolysis and have a highly oriented structure, but the size is small (diameter 2-20nm, length 100-600nm, aspect ratio 10-100), the preparation process needs to be treated with strong acid, The preparation process is complex and the cost is high. Cellulose nanofibrils are the products of cellulose fibrillation through enzymatic or mechanical treatment of cellulose raw materials, and have a high aspect ratio (diameter 10-40nm, length greater than 1 μm, a...

Claims

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Application Information

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IPC IPC(8): D01F6/54D01F1/10D01F8/08D01F8/02
CPCD01F1/10D01F6/54D01F8/02D01F8/08
Inventor 李金鹏陈克复王斌李文斌曾劲松
Owner SOUTH CHINA UNIV OF TECH
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