The performance of the cationic color degeneration dye and its application in wool fabric dyeing

In order to prepare a category of photosynthesis dye that can be used for wool, the article synthesizes a quarterly ammonium salted pyramide dye with 2,3,3 3H —  ), And the structure of its structure is performed through mass spectrometry. In order to study the performance of the dye, the discoloration performance of the dye in the solvent was examined, and the effect of the solvent and the impact of the pH value of the solution on its performance. Studies have found that SPTEA has good solubility in a variety of solvents, and has a good discoloration effect in different solvents. The optical discoloration speed of the solution slows down with the increase of the polarity of the solvent. At the same time, the polarity of the solution also affects the position of its maximum absorption peak. When the polarity of the solution increases, SPTEA's maximum absorption wavelength blue shifts, otherwise red move. The pH value of the solution also has a certain effect on the color change performance. In an acidic environment, the SPTEA solution is yellow and loses the color change ability. The solution is regulated to weak alkali. At the same time, the dye has good light resistance fatigue. After 50 times of ultraviolet-visible light circulation, the light absorption drops to the original 35.2%. By immersion dyeing, the well -known photosynthesis performance of dyeing wool fabrics can be given. The color change level is 1 ~ 2 levels, and the soap -resistant coloring fastness is 4 ~ 5. SPTEA is expected to become a category of photosynthesis dyeing for natural protein fibers.

Keywords: optical discoloration dye; cations; pyramuu; woolen fabric is a common organic light -degenerating dye dye. The opening structure of the Jing will be restored to colorless state after the stimulation source is removed [1-2]. The advantages of reversible discoloration and fast light response speed are widely used in drug carriers [3], biological probes [4], textile clothing [5-6] and other fields. However, the solubility of porkyu is low in water. Usually the wire printing method is used to apply the dye to the cotton fabric, dry and remove the water after removing the water [7]; you can also add color -changing dyes to the spinning raw solution or dissolved porkyl -span dissolving In dystershopine, the polyethylene fiber is not immersed, and the solvent is volatilized to obtain the light response fiber [8]; The method is printed on wool fabrics [9]. However, these methods are not directly dyeing natural fibers such as cotton and hair, which limits its application in natural fibers.

Wool fabric feels soft, moisturizing and breathable, and is loved by consumers, but there are only a few photosynthesis dyes that can be applied to wool fabrics [10-11]. In order to prepare a category of light -to -chromat dye that can be used for wool dyeing, this article introduces the cycle ammonium salt group on the pyraropyra to improve its water solubility, and uses wool fiber to be electrical under neutral conditions. The characteristics of electronic positive photosynthesis dyeing dyes to achieve dyeing of wool fiber.

1 test section

1. 1 material and instrument

Material: Pure wool fabric (face density 218 g/m2, yarn wire density 17.5 DTEX)

2,3,3 — triangular base -3 H  (Sayan Chemical Technology (Shanghai) Co., Ltd.), 1,3 -di bromide (Shanghai McCin Biochemical Technology Co., Ltd.), 5 —— Nitro Kyamu Popularity Aldehyde, four -right axomium iodide  hydrochloric acid, ethanol, methanol, acetone, acetylene the above reagents are all analyzed.

Instrument: DZF-6020 vacuum drying box  UV-2600 UV-Visible Lighting Meccay  ultra-high-efficiency liquid color spectrum spectrum use instrument  SW-24E type washing color fastness test machine 

1. 2 Test method

1. 2. 1 Synthetic SPTEA

By the following 3 steps to synthesize the optical degenerate porkye dye (SPTEA)

Figure 1 SPTEA synthesis path

Specific synthesis steps are: 1,3 -di bromide (5 g, 31 mmol) and 2,3,3  (19 g, 94 mmol), 80 ℃ The reaction 4 h obtained the product 1 (2. 96 g, the yield 33.5%); the product 1 (1.8 g, 5 mmol) and the triathrin (0.77 ml, 5.5 mmol) were added to the ethanol (50 ml), stirring at room temperature After 5 min, add 5 -nitrowater popthyde (0.83 g, 5 mmol), 70 ° C avoidance of 12 h, and use acetate ethyl acetate with petroleum ether (volume ratio 1: 9) for column layer analysis, rotate and evaporate to remove solvents After obtaining the product 2 (1.51 g, yield of 70.3%); the product 2 (1.2 g, 2.78 mmol), triamine (0.56 g, 5.45 mmol), and a small amount of tetrabuitramium iodide dissolved in ethanol ( 30 ml), heated to 70 ° C, and stirred 48 h from light, and after filtering, the product 3 (dye SPTEA) (0.76 g, yield of 51.5%).

1. 2. 2 SPTEA Photo Trimming Performance Test

The SPTEA is dissolved in the 4 solutions of petroleum ether, acetone, acetate, and methanol. Its absorption curve is tested every 10 s to the changes in the absorption strength at the maximum absorption wavelength to explore the impact of solvents on SPTEA's color -changing performance.

Take the SPTEA with the above -mentioned acetate as a solvent, use HCL/triamine to adjust the pH value, and observe the change of solution after 3 minutes of ultraviolet lamp to explore the impact of pH value on SPTEA color change performance.

Take the SPTEA with the above methanol as a solvent, use 365 nm ultraviolet light (2 W) as the light source, the irradiation distance is 3 cm, and then put it in the dark environment after 3 minutes. Determine the dye dye fatigue fatigue with its strength.

1. 2. 3 SPTEA dyeing wool

Wool fabric 2 g, SPTEA 1%(OWF), a bath ratio 1: 30, pH value of 7, pre -dyeing 30 min at 40 ° C. Since the dyeing liquid exceeds 70 ° C, the wool will change color. Dye 60 min, after the dyeing is cooled to room temperature, according to water washing (60 ° C, 10 min) → soap washing (soap washing reagent 1%, 60 ° C, 10 min) → water washing (60 ° C, 10 min) processes in post -treatment Essence

1. 2. 4 Wool performance test after dyeing

After dyeing, the K/S value changes before and after the color changes of cloth samples, according to AATCC 139-2005 "COLORORFASTNES TO LIGHT: DETECTION of Photochromism) test SPTEA dyeing color change level after dyeing sheep fabrics" Use DataColor 650 to build a color -changing color card test. According to the GB/T 3921-2008 "Textile Color Test the Test of Speed Resistance to soap -to -color washing fastness" test SPTEA dyeing the soap -resistant coloring fastness after wool fabric is dyed.

2 results and discussion

2. 1 synthesis of SPTEA

Three steps react to synthesize photosynthesis of porkye dyes (SPTEA). The yield of bromide reactions with di bromol is low. The reason is that the reaction is that the reaction exists with the product of 2 mol 吲哚 and 1 mOL di bromide to generate double -crickets, which reduces the yield. Crobylceae is mature with nitro -hydrophiltalin. Finally, the steps to introduce tritethalms to obtain the target product of the cycle of the cycle of cycle of cycle ammonium iodide are added to obtain the target product of the goal of the cycle.

2. 2 SPTEA representation

See the literature of the intermediate product of the SPTEA synthetic reaction 1 bromine proprobidyl s and the product 2 pupidol, see the document [12]. The final product obtained by this method is a mixture of SPTEA and excessive trimethalms and catalysts. Therefore, its structure is confirmed only by mass spectrometry. Figure 3 shows the mass spectrometry of SPTEA. The peaks of 450. 283 5 are their molecular ion peaks; the peaks of 102. 124 3 are molecular ion peaks of tithamine.

2. 3 SPTEA performance

Splea is dissolved in organic solutions or dyeing the wool fabrics through immersion to examine its optical discoloration performance in the state of solution and solid.

2. 3. The effect of solvent on SPTEA color change performance

Subtea is dissolved in solvents with 1 × 10-4 mol/L such as acetone, ethyl acetate, petroleum ether, and methanol to examine its color change performance. The effect of solvent on SPTEA's color change performance is shown in Table 1. If 365 NM ultraviolet lamps are irradiated, the solvent with petroleum ether solution is colorless or light yellow. Under the stimulation of ultraviolet rays, the color of the solution becomes blue (Table 1) 4 kinds of solvents ultraviolet

3 conclusions

Taking reagents such as 2,3,3 — three -meta -3H — , 1,3 — di bromoline as raw materials, 3 steps are simply responded to synthetic photosynthesis of photosynthesis. SPTEA has a good optical discoloration performance in the solution state, and its maximum absorption wavelength shifts as the solvents increase, and the polarity decreases. The pH value of the solution will also affect its color change ability, and the dye loses the color change performance under acidic conditions; the optical discoloration performance of the dye in the alkaline conditions recovers. The fabric fabric obtained by the immersion method will occur after 365 nm ultraviolet light. The degree of tested color is 4 ~ 5. This type of dye is expected to be dyed in natural protein fibers such as wool.