阅读说明：本技术 一种提高亚麻混纺纤维织物上染率的方法 (Method for improving dye-uptake of flax blended fiber fabric ) 是由 栾俊 于 2019-12-10 设计创作，主要内容包括：本发明涉及染色与环保技术领域,公开了一种提高亚麻混纺纤维织物上染率的方法,通过对纤维结构以及染色原理的研究,不仅解决现有工艺中采用亚麻混纺纤维加工织物,染色效率低、染色不均匀、成本过高的问题,包括染色促进剂制备、亚麻混纺纤维织物染色前预处理、染色工艺、风干水洗,制备得到的该染色促进剂具有纳米级别二氧化钛包覆壳层结构,能够显著提高亚麻纤维的表面亲和力,染料分子能够快速渗透至纤维内部,促进染料在纤维织物表面的扩散和吸附,并有利于染色进行,能够提高亚麻混纺纤维织物的上染率,染色产品色泽均匀,牢固性高,扩大了亚麻纤维在纺织领域的应用范围,该工艺能够很好的解决现有亚麻混纺纤维织物染色过程中的弊端。(The invention relates to the technical field of dyeing and environmental protection, and discloses a method for improving the dye-uptake of flax blended fiber fabric, which solves the problems of low dyeing efficiency, uneven dyeing and overhigh cost of the fabric processed by flax blended fiber in the prior art by researching the fiber structure and the dyeing principle, and comprises the steps of preparing a dyeing accelerant, pretreating the flax blended fiber fabric before dyeing, air-drying and washing, wherein the prepared dyeing accelerant has a nano-level titanium dioxide coated shell structure, can obviously improve the surface affinity of the flax fiber, can quickly permeate dye molecules into the fiber, promotes the diffusion and adsorption of the dye on the surface of the fiber fabric, is beneficial to dyeing, can improve the dye-uptake of the flax blended fiber fabric, has uniform color and luster of a dyed product and high firmness, and expands the application range of the flax fiber in the textile field, the process can well solve the defects in the existing flax blended fiber fabric dyeing process.)

1. A method for improving the dye-uptake of flax blended fiber fabric is characterized in that the prepared dyeing promoter is added for dyeing during dyeing; the method comprises the following process steps:

(1) preparing a dyeing accelerant: adding 50-60 ml of sodium hydroxide aqueous solution into a beaker, dropwise adding 14-17 g of saturated ferric chloride solution into the solution, heating to 70-80 ℃ under stirring, continuously stirring for 30-40 minutes, standing, cooling for 60-80 minutes, filtering, washing for 3-4 times by using deionized water and absolute ethyl alcohol respectively and sequentially, ultrasonically mixing the obtained product with titanium dioxide sol with the mass concentration of 27-30% at the mixing mass ratio of 1:1.3-1.5, dipping at 35-40 ℃ for 2-3 hours, transferring to a vacuum drying oven for drying for 4-5 hours, then sending into a tubular furnace preheated at 180 ℃ at 150-, under the protection of nitrogen, heating to 520 ℃ at the speed of 2.5-3.0 ℃/min, and carrying out heat preservation and calcination for 3-4 hours to obtain the microsphere with the magnetic titanium dioxide coating structure, namely the dyeing promoter;

(2) pretreatment before dyeing of the flax blended fiber fabric: placing the flax blended fiber fabric to be dyed in a sodium hypochlorite aqueous solution with the concentration of 13-15 g/L, adding sodium silicate into the solution, wherein the adding amount of the sodium silicate is 1.2-1.4 g/L, continuously stirring for 20-30 minutes, standing and soaking for 20-25 minutes, the material-liquid ratio is 1:40-45, the soaking temperature is 20-23 ℃, washing to be neutral after soaking, and drying in a blast drying oven at 55-60 ℃ to dye;

(3) the dyeing process comprises the following steps: adding the prepared dyeing promoter into the active dye liquor, uniformly dispersing, then adding the pretreated flax blended fiber fabric, dyeing according to the bath ratio of 1:10-12, heating to dye at normal pressure at the heating speed of 0.2-0.4 ℃/min, the dyeing temperature of 50-55 ℃, the dyeing time of 20-30 minutes, cooling to 20-25 ℃ after dyeing is finished, taking out the flax blended fiber fabric, and washing, soaping and drying the flax blended fiber fabric by adopting a conventional method.

2. The method for improving the dye uptake of flax blend fiber fabric according to claim 1, wherein the molar concentration of the aqueous sodium hydroxide solution in step (1) is 1.2-1.3 mol/l.

3. The method for improving the dye uptake of flax blend fiber fabric according to claim 1 wherein the flow rate of the nitrogen atmosphere in the tube furnace of step (1) is 60 to 80 cc/min.

4. The method for improving the dye uptake of flax blended fiber fabric as claimed in claim 1, wherein the particle size of the dyeing promoter microsphere obtained in step (1) is 330-350 nm, and the thickness of the coating shell is 35-45 nm.

5. The method for improving the dye uptake of the flax blended fiber fabric according to claim 1, wherein the flax blended fiber fabric in the step (2) comprises the following components in parts by weight: 40-50 parts of flax fiber and 20-30 parts of other fibers; the other fibers comprise one or more of cotton fibers, nylon fibers and acrylic fibers.

6. The method for improving the dye-uptake of flax blended fiber fabric according to claim 1, wherein the dye-accelerating agent is added in the step (3) in an amount of 0.06-0.07% by mass of the dye liquor.

Technical Field

The invention belongs to the technical field of dyeing and environmental protection, and particularly relates to a method for improving the dye-uptake of flax blend fiber fabric.

Background

The flax has high development and utilization value, and the fiber prepared from the flax stem is an important raw material in the textile industry, can be spun purely and can also be blended with other fibers. Flax fiber has many unique irreplaceable advantages compared with animal fiber, other plant fiber and synthetic fiber, which determines that the flax fiber plays an important role in national economy. Firstly, the flax fiber is tough and flexible, the strength of the flax fiber is 1.5 times that of the cotton fiber and 1.6 times that of the spun silk, the spinnable count is high, the fabric is smooth and tidy, and the flax fiber is suitable for making high-grade clothing. Secondly, the flax fiber has the unique advantages of strong hygroscopicity, fast heat dissipation, friction resistance, high temperature resistance, nonflammability, difficult cracking, small electrical conductivity, low dust absorption rate, bacteriostasis, health care and the like.

Because the linen fiber fabric has the advantages of easy wrinkle and poor stereoscopic impression, the linen blend fiber is generally adopted for spinning. However, the linen fiber has a low cellulose content, and due to the special fiber morphological structure, the dye molecules have a low dye uptake on the fabric, and the problems of poor level-dyeing property and insufficient color fastness to meet the requirements exist.

Disclosure of Invention

The invention aims to solve the existing problems, provides a method for improving the dye-uptake of flax blended fiber fabric, can improve the dye-uptake of the flax blended fiber fabric, has uniform color and luster of a dyed product and high firmness, and widens the application range of the flax fiber in the textile field.

The invention is realized by the following technical scheme:

a method for improving the dye-uptake of flax blended fiber fabric comprises the steps of preparing a dyeing accelerant, pretreating the flax blended fiber fabric before dyeing, air-drying and washing;

the preparation and use of the dyeing promoter remarkably improve the dye uptake of the fabric in the dye.

Specifically, the method comprises the following process steps:

the preparation method of the S1 dyeing promoter comprises the following steps: adding 50-60 ml of sodium hydroxide aqueous solution into a beaker, dropwise adding 14-17 g of saturated ferric chloride solution into the solution, heating to 70-80 ℃ under stirring, continuously stirring for 30-40 minutes, standing, cooling for 60-80 minutes, filtering, washing for 3-4 times by using deionized water and absolute ethyl alcohol respectively and sequentially, ultrasonically mixing the obtained product with titanium dioxide sol with the mass concentration of 27-30% at the mixing mass ratio of 1:1.3-1.5, dipping at 35-40 ℃ for 2-3 hours, transferring to a vacuum drying oven for drying for 4-5 hours, then sending into a tubular furnace preheated at 180 ℃ at 150-, under the protection of nitrogen, heating to 520 ℃ at the speed of 2.5-3.0 ℃/min, and carrying out heat preservation and calcination for 3-4 hours to obtain the microsphere with the magnetic titanium dioxide coating structure, namely the dyeing promoter; the dyeing promoter can play a role in accelerating activation during dyeing, has good affinity with the flax blended fiber fabric, and can quickly diffuse carried dye molecules into fibers through mutually communicated pore canals when the flax blended fiber fabric is contacted with the flax blended fiber fabric, and form the combination of hydrogen bonds and van der Waals force with the fiber molecules, so that the color depth and the gorgeous degree of the dyed fabric are increased, and the dyeing firmness is remarkably improved.

The molar concentration of the sodium hydroxide aqueous solution is 1.2-1.3 mol/L; the saturated ferric chloride solution is a saturated solution at the temperature of 25 ℃ under normal pressure; the flow rate of the nitrogen atmosphere in the tubular furnace is 60-80 cubic centimeters per minute, the particle size of the obtained dyeing promoter microsphere is between 330 and 350 nanometers, and the thickness of the coating shell layer is between 35 and 45 nanometers.

S2 pretreatment before dyeing of flax blend fiber fabric: placing the flax blended fiber fabric to be dyed in a sodium hypochlorite aqueous solution with the concentration of 13-15 g/L, adding sodium silicate into the solution, wherein the adding amount is that the concentration of the sodium silicate reaches 1.2-1.4 g/L, continuously stirring for 20-30 minutes, standing and soaking for 20-25 minutes, the material-liquid ratio is 1:40-45, the soaking temperature is 20-23 ℃, washing to be neutral after soaking, and drying in a blast drying box at 55-60 ℃ to dye.

The flax blended fiber fabric comprises the following components in parts by weight: 40-50 parts of flax fiber and 20-30 parts of other fibers; the other fibers comprise one or more of cotton fibers, nylon fibers and acrylic fibers.

S3 dyeing process: preparing a reactive dye solution with the concentration of 1.6 percent (owf), adjusting the pH value of the dye solution to be 8.2-8.5 by using a sodium hydroxide-sodium carbonate buffer solution, adding the prepared dyeing accelerant into the dye solution, wherein the adding amount of the dyeing accelerant is 0.06-0.07 percent of the mass of the dye solution, uniformly dispersing, then adding the pretreated flax blended fiber fabric, dyeing according to the bath ratio of 1:10-12, heating and dyeing under normal pressure, wherein the heating speed is 0.2-0.4 ℃/min, the dyeing temperature is 50-55 ℃, the dyeing time is 20-30 min, and cooling to 20-25 ℃ after dyeing is finished.

The pH value of the sodium hydroxide-sodium carbonate buffer solution is between 9.0 and 9.2.

S4 washing with water and air drying: after dyeing is finished, the flax blended fiber fabric is taken out and washed, soaped and dried by a conventional method, and the dyeing promoter particles are recovered, washed and dried for repeated use.

Wherein the air drying temperature of the flax blended fiber fabric is 55-60 ℃.

Compared with the prior art, the invention has the following advantages: in order to solve the problem of low dye-uptake of the flax blended fiber fabric, the invention provides a method for improving the dye-uptake of the flax blended fiber fabric, through the research on the fiber structure and the dyeing principle, the method not only solves the problems of low dyeing efficiency, uneven dyeing and overhigh cost of the fabric processed by the flax blended fiber in the prior art, and comprises the steps of preparing a dyeing accelerant, pretreating the flax blended fiber fabric before dyeing, dyeing process and air-drying and water-washing, wherein the prepared dyeing accelerant has a nano-level titanium dioxide coated shell structure, can obviously improve the surface affinity of the flax fiber, can quickly permeate dye molecules into the fiber, promotes the diffusion and adsorption of the dye on the surface of the fiber fabric, is beneficial to dyeing, reduces the temperature and time in the dyeing process, and can improve the dye-uptake of the flax blended fiber fabric, the dyeing product has uniform color and high firmness, enlarges the application range of the flax fiber in the textile field, can well solve the defects in the dyeing process of the conventional flax blended fiber fabric, does not add harmful substances or leave impurities in the dyeing process, improves the comprehensive utilization rate of the dye, reduces the cost, and improves the dye uptake of the dye on the flax blended fiber fabric, the invention effectively solves the problem of low dye uptake of the flax blended fiber fabric, has the characteristics of low cost, low energy consumption and quick color fixation, greatly reduces the steps of the dyeing processing process, has basically no resource waste in the process treatment process, completely accords with the national regulation of wastewater discharge, conforms to the development trend of green, environment-friendly and low carbon in the clothing industry, can realize the practical significance of improving the work efficiency and market competitiveness of the clothing dyeing processing industry, and has higher value for the research on the production process method of the flax fiber textile, the method obviously promotes the rapid development and the sustainable development of resources in the modern textile industry and the environmental protection industry, and is a technical scheme which is extremely worthy of popularization and use.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 shows the influence of different dyeing promoter amounts on the disperse dye uptake in the dyeing treatment of flax blended fiber fabrics.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described with reference to specific embodiments, and it should be understood that the specific embodiments described herein are only used for explaining the present invention and are not used for limiting the technical solutions provided by the present invention.