TWI681974B - Manufacturing method of auxiliary agent for dyeing - Google Patents

Abstract

The invention provides a method for manufacturing an auxiliary agent for dyeing. By synthesizing and grafting the natural materials sodium alginate and glutamic acid into a sodium alginate derivative surfactant, the dyeing and finishing wastewater is dyed by the agglutination characteristics of the auxiliary agent Live and bring it into the cellulose fabric, in order to increase the dyeing rate of the fabric in the dyeing process and reduce the residual dye rate of the waste water generated later.

Description

Manufacturing method of auxiliary agent for dyeing

The present invention belongs to the field of dyeing auxiliary agents, and in particular relates to a method for manufacturing a dyeing auxiliary agent that can increase the coloring rate during dyeing and reduce the residual dye rate of waste water generated in the subsequent process.

According to the press, in the textile industry, the dyeing and finishing process is a very important part, which will determine the performance of the finished product. With the progress of the times, the treatment technology and construction methods have been advancing with each passing day, but the high-color wastewater after dyeing and finishing Treatment is still the most difficult issue in the current generation of environmental protection advocates. The main pollutants in the dyeing and finishing wastewater are organic compounds of dyes. The discharge of these substances in rivers and rivers is easy to cause huge ecological impact. For the dyeing and finishing industry, in order to meet the economic benefits, most of the treatment methods for dyeing and finishing wastewater are combined with biological Processing and chemical coagulation procedures, there are currently about 10,000 different dyes used in industrial production, and more than 7x10 ⁵ additives, produced in various parts of the world. However, even if the existing additives on the market are used to help the dyeing and finishing process, there are still about 20-25% of the dye compounds that cannot attach to the fabric during the dyeing and finishing process and are discharged with wastewater, so in the process More effective additives need to be used to reduce the damage of dyeing and finishing wastewater to the environment.

In view of this, the inventor feels that he has not perfected and exhausted his mental painstaking research, and based on his accumulated experience in the industry for many years, in order to provide a method for manufacturing dyeing additives, in order to improve the above-mentioned conventional technology Missing.

Therefore, an object of the present invention is to provide a method for manufacturing an auxiliary agent for dyeing, so as to increase the dyeing rate of the fabric during the dyeing process and reduce the residual dye rate of the waste water generated subsequently.

其中，n係為10000-15000。 In order to achieve the above object, the present invention provides a method for manufacturing an auxiliary agent for dyeing, which includes the following steps: (A) dissolve sodium alginate in water and stir to a uniform state; (B) mix sodium alginate and Epichlorohydrin is mixed and stirred at a constant temperature of 70°C for 1 to 2 hours; (C) In addition, glutamic acid is mixed with water and stirred at a constant temperature of 90°C for 2 hours; and (D) Step B The product and the product of Step C were subjected to a synthesis reaction at a temperature of 100° C. and continued for 2 hours to remove moisture, and a dyeing auxiliary was obtained. Among them, the general formula of the dyeing auxiliary is:

Among them, n series is 10000-15000.

Preferably, the present invention further includes the following steps: (E) dissolving the dyeing auxiliary of step D with ethanol and filtering, and then distilling under reduced pressure to remove the solvent to obtain the dyeing auxiliary of high purity.

In this way, the dyeing auxiliary provided by the present invention can greatly reduce the content of the dye compound in the wastewater after dyeing, thereby reducing the pollution after the wastewater is discharged.

In order for your reviewer to clearly understand the content of the present invention, the following description is accompanied by drawings. For ease of understanding, the same elements in the following embodiments are denoted by the same symbols.

而n係為10000-15000。當製程完成後，還可以進行後續處理，以將合成物純化，以乙醇溶解未完成之反應的原料後過濾，再以減壓蒸餾去除溶劑及多餘水分，可得到較高純度的合成物，並針對染色之情況不同而調製成不同濃度。 In this embodiment, one of the auxiliary agents for dyeing provided by the present invention is made by the following method: First, sodium alginate is added to water to dissolve, and stirred to a uniform state. Next, the sodium alginate and the epichlorohydrin, which are uniformly stirred, are mixed and stirred at a constant temperature for 1 to 2 hours at a temperature of 70° C. At this time, a first intermediate product is produced by the reaction. In addition, glutamic acid is mixed with water and stirred at a constant temperature of 90°C for 2 hours. At this time, a second intermediate product is produced by the reaction. Finally, the first intermediate product and the second intermediate product were subjected to a synthesis reaction at a temperature of 100° C. and continued for 2 hours to remove water to obtain the dyeing auxiliary. At this time, the chemical structure of the dyeing auxiliary is

The n series is 10000-15000. After the process is completed, subsequent treatments can be carried out to purify the composition, dissolve the raw materials of the unfinished reaction with ethanol, and then filter, and then remove the solvent and excess water under reduced pressure to obtain a higher purity composition, and According to the different dyeing conditions, it is adjusted to different concentrations.

純水在25℃時，表面張力約在72.4dyne/cm，當加入助劑後，表面張力會隨著其濃度增加而降低，圖1中可以看出當加入該染色用助劑後，隨著加入之助劑濃度提高，表面張力並隨之下降，由此可判定該染色用助劑具有助劑之特性。 Fig. 1 below is a diagram for performing data analysis on the dyeing auxiliary agent, and further confirming whether the dyeing auxiliary agent has the characteristics of the auxiliary agent. figure 1

When pure water is at 25℃, the surface tension is about 72.4dyne/cm. When the additive is added, the surface tension will decrease with the increase of its concentration. It can be seen in Figure 1 that after adding the dyeing auxiliary, The concentration of the added auxiliary agent increases, and the surface tension decreases accordingly. It can be judged that the auxiliary agent for dyeing has the characteristics of the auxiliary agent.

由於過多的泡沫會阻礙染料和布料纖維的接觸，而造成染色不均問題發生，且若泡沫難消除時，排入河川會造成無氧化，對環境形成負擔。而圖2中可以看出加入該染色用助劑後，起泡性低，泡沫穩定性良好，符合環保需求，因此係為良好且較不會汙染環境之助劑。 Figure 2 below is a schematic diagram of the results obtained after conducting experiments on whether too much foam will be generated after adding the dyeing auxiliary. figure 2

Too much foam will hinder the contact between the dye and the fabric fiber, which will cause uneven dyeing problems. If the foam is difficult to eliminate, it will cause no oxidation when discharged into the river, which will burden the environment. It can be seen in Fig. 2 that after adding the dyeing auxiliary, the foaming property is low, the foam stability is good, and it meets the environmental protection requirements. Therefore, it is a good auxiliary agent that does not pollute the environment.

In the dyeing process, the most ideal condition is to allow the dyed fabric to fully absorb the dye, which not only allows the finished product to be close to the original color of the dye, but also solves the problem of excessively high chroma of the discharged wastewater, but it is often difficult to operate in the field. Achieved. Therefore, in this embodiment, the present invention provides a dyeing process that uses the above-mentioned dyeing auxiliary to increase the coloring rate and reduce the residual rate of dye in wastewater, and includes the following steps: (1) adding dye and a Auxiliaries for dyeing; (2) Put a fiber fabric in a steel bottle and seal it for dyeing; and (3) Take out the fiber fabric and wash it with water and soap, and then dry it naturally. In this embodiment, the fiber fabric used for dyeing uses natural fibers.

圖4

由圖3和圖4可得知，於上色率方面，該染色用助劑在0.8%濃度時為五種測試濃度中最強的區間。並且，染色製程中，時間的控制關係到上色率差異及染色均勻度等等，且染色時間為染整中所耗費的無形成本，是產出效率中相當重要的一環，從圖中可知，當染色保溫時間到達60分鐘後，上色率即無明顯的增加，且75分鐘時上色率些微下降，而90分鐘、45分鐘與30分鐘時上色率相差些微。經過以上分析，該染色用助劑之濃度於0.8%且60分鐘之染色時間係為最佳條件。 關於該染色用助劑於0.8%濃度後，色強度有逐漸下降的傾向，原因係為該染色用助劑為兩性離子界面活性劑的因素，結構中有著帶正電之胺基，其與直接染料的陰離子產生電荷相吸，當濃度一超出假定臨界值，如0.8%，該染色用助劑則與天然纖維產生競染作用，進而影響到染料進入纖維內部，以至於造成染色殘留率與色強度一同降低的結果。因此，若該染色用助劑之較佳濃度為0.8%，過多的藥劑只會造成染後廢水處理不易，進入河川中將會造成不必要的汙染。 Figures 3 and 4 below are schematic diagrams of the results of detecting the dyeing rate of the fabric after adding different concentrations of the dyeing auxiliary and after adjusting the dyeing time. image 3

Figure 4

It can be seen from FIGS. 3 and 4 that in terms of coloring rate, the dyeing auxiliary is the strongest of the five test concentrations at a concentration of 0.8%. Moreover, in the dyeing process, the control of time is related to the difference in coloring rate and dyeing uniformity, etc., and the dyeing time is an intangible cost spent in dyeing and finishing, which is a very important part of output efficiency. As can be seen from the figure, When the dyeing and holding time reached 60 minutes, the coloring rate did not increase significantly, and the coloring rate decreased slightly at 75 minutes, while the coloring rate differed slightly at 90 minutes, 45 minutes, and 30 minutes. After the above analysis, the concentration of the dyeing auxiliary is 0.8% and the dyeing time of 60 minutes is the best condition. About the dyeing auxiliary at a concentration of 0.8%, the color intensity tends to gradually decrease, the reason is that the dyeing auxiliary is a zwitterionic surfactant, the structure has a positively charged amine group, which is directly related to The anion of the dye produces charge attraction. When the concentration exceeds the assumed critical value, such as 0.8%, the dyeing auxiliary will compete with the natural fiber, which will affect the dye entering the fiber, so that the residual dyeing rate and color The result of the reduction in strength. Therefore, if the preferred concentration of the dyeing auxiliary is 0.8%, too much reagent will only make it difficult to treat the wastewater after dyeing, and it will cause unnecessary pollution into the river.

圖6

由圖5和圖6可得知，該染色用助劑在染色溫度70度時，染料殘留率係處於最低處，而於色強度，也就是上色率方面，70度則是五種測試溫度中最高的位置，經過以上分析，該染色用助劑之染色溫度於70度為最佳條件。 Figures 5 and 6 below are schematic diagrams of the results after detecting the dyeing rate of the fabric and the residual rate of dye in the wastewater after the process is completed for different dyeing temperatures. Figure 5

Figure 6

It can be seen from Figures 5 and 6 that the dyeing auxiliary agent has the lowest dye residual rate at the dyeing temperature of 70 degrees, and 70 degrees are the five test temperatures in terms of color strength, that is, the color rendering rate. The highest position in the middle, after the above analysis, the dyeing temperature of the dyeing auxiliary at 70 degrees is the best condition.

In summary, through the above experimental data, it is shown that the dyeing auxiliary agent provided by the present invention can indeed make the cloth on the dyeing process compared with the process without adding the auxiliary agent and the process with the addition of general sodium alginate. The color rate is improved, and at the same time, the residual dye content in the waste water generated afterwards can be reduced to avoid deepening the pollution to the environment.

However, the above are only the preferred embodiments of this creation, and are not used to limit the scope of the implementation of this creation, so those with ordinary knowledge in the technical field of the subject, or familiar with this technology make equivalent or easy The changers, the equal changes and modifications made without departing from the spirit and scope of this creation, should be covered by the patent scope of this creation.

Claims (3)

A method for manufacturing an auxiliary agent for dyeing includes the following steps: (A) Add sodium alginate to water to dissolve and stir to a uniform state; (B) Mix the sodium alginate and epichlorohydrin which are evenly stirred, and stir at a constant temperature for 1 to 2 hours at a temperature of 70°C; (C) In addition, mix glutamic acid with water and stir at a constant temperature of 90°C for 2 hours; and (D) The product of Step B and the product of Step C were subjected to a synthesis reaction at a temperature of 100°C and continued for 2 hours to remove moisture, and a dyeing auxiliary was obtained. The manufacturing method as described in item 1 of the patent application scope, wherein the general formula of the dyeing auxiliary is

Among them, n series is 10000-15000. The manufacturing method described in item 2 of the patent application scope further includes the following steps: (E) The dyeing auxiliary of step D is dissolved in ethanol and filtered, and then distilled under reduced pressure to remove the solvent to obtain the dyeing auxiliary of high purity.