Alizarin red pH response color-changing fibers and preparation method thereof

A color-changing fiber and alizarin red technology, applied in the field of material processing, can solve problems such as uneven impregnation, short-term effect, and poor washability

Inactive Publication Date: 2015-06-24
YANCHENG JUNLONG YARN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of uneven impregnation, poor washability, and short-term effect in the production of pH color-changing fabrics by the existing traditional dyeing and surface finishing processes, the invention provides an alizarin red pH-responsive color-changing fiber and its preparation method, add an appropriate amount of alizarin red to the spinning solution for wet spinning, so that the fiber can obtain the characteristic of pH-responsive discoloration

Method used

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  • Alizarin red pH response color-changing fibers and preparation method thereof
  • Alizarin red pH response color-changing fibers and preparation method thereof
  • Alizarin red pH response color-changing fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The spinning steps are:

[0039] (1) PAN powder is dried and dehydrated, and separated by sieve filtration.

[0040] A certain amount of PAN powder is placed in an oven, and dried by a staged heating method, (60°C×1h)→(80°C×1h)→(100°C×2h)→(105°C×1h).

[0041] Use a 100-150 mesh stainless steel mesh sieve to filter the dried PAN powder to remove large agglomerated particles. The sieved PAN fine powder was placed in a vacuum constant temperature oven at 40°C for later use.

[0042] (2) Selection of spinning solvent.

[0043] Considering many aspects such as rapid volatilization, skin-friendly safety, spinnability and solubility of alizarin red, 60% sodium thiocyanate (NaSCN) aqueous solution was selected as the spinning solvent, and 10% thiocyanate was used accordingly. Sodium aqueous solution is the coagulation bath.

[0044] (3) Determination of the content of PAN and Alizarin Red.

[0045] ① Prepare 100 g of spinning solution with a mass concentration of PAN of 12...

Embodiment 2

[0060] Step (1) PAN powder is dried and dehydrated, and separated by sieve filtration. Use the constant temperature drying method to dry at 100°C for 6 hours, and then use a 100-150 mesh stainless steel mesh sieve to filter and sieve to remove large agglomerated particles. The sieved PAN fine powder was placed in a vacuum constant temperature oven at 40°C for later use.

[0061] Steps (2)-(9) are the same as in Example 1.

Embodiment 3

[0063] The selection of step (2) solvent. Solvent uses 58% sodium thiocyanate (NaSCN) aqueous solution, method is the same as embodiment 1 in other steps.

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Abstract

The invention relates to alizarin red pH response color-changing fibers and a preparation method thereof. According to the preparation method, alizarin red with the dry weight accounting for 0.05%-2% of that of polyacrylonitrile is added into spinning liquid taking 58%-60% sodium sulfocyanate (NaSCN) aqueous solution as a solvent and containing 11%-14% of polyacrylonitrile for wet spinning. The prepared fibers are uniform in coloring and excellent in color fastness, and have weaving mechanical properties and obvious pH response color changing performance.

Description

technical field [0001] The invention relates to an alizarin red pH-responsive color-changing fiber and a preparation method thereof, belonging to the technical field of material processing. Background technique [0002] Discoloration refers to the color change of a substance under the action of the external environment. Devices made by people using the discoloration of materials are called discoloration materials. According to the way the material is stimulated, there are mainly photochromic, thermochromic, electrochromic and acid-induced chromic. Various discoloration phenomena add convenience and interest to people's life, and also make the world more colorful. As a new material, textiles with color-changing function have a huge application market. [0003] Alizarin red, also known as sodium alizarin sulfonate, the molecular formula is C 14 h 7 NaO 7 S·H 2 O, the color of the alizarin red aqueous solution changes with the pH of the solution. In view of this property...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/06
Inventor 吴焕岭顾东雅刘德驹
Owner YANCHENG JUNLONG YARN CO LTD
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