Fabric anti-wrinkle finishing agent and preparation method thereof

Abstract

The invention relates to a fabric anti-wrinkle finishing agent and a preparation method thereof. The fabric anti-wrinkle finishing agent is prepared from the following raw materials in percentage by mass: 30-40% of modified chitosan, 25-32% of citric acid, 2-4% of tea tree essential oil, 3-5% of dextrin, 1-3% of sorbic acid, 5-10% of glycerol and 13-27% of deionized water. Wherein the modified chitosan is a chitosan degradation product obtained by carrying out enzymatic degradation reaction and drying treatment on chitosan and a papaya extract. The invention provides a fabric anti-wrinkle finishing agent containing modified chitosan, and the modified chitosan is a chitosan degradation product obtained by carrying out enzymatic degradation reaction and drying treatment on chitosan and a papaya extract, experiments prove that when the fabric anti-wrinkle finishing agent is used for treating the fabric, the anti-wrinkle performance and the color fastness of the fabric can be remarkably improved, and particularly the color fastness to perspiration and acid stain can be remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fabric anti-wrinkle finishing agent, and particularly relates to a fabric anti-wrinkle finishing agent and a preparation method thereof. BACKGROUND

[0002] Anti-wrinkle finishing is an important link of textile finishing, aiming to improve the wrinkles of fabrics caused by external force in the use process, so as to keep the appearance of the fabrics flat and beautiful. Traditional anti-wrinkle finishing agents mostly use formaldehyde or formaldehyde derivatives, which have significant effects, but have the problem of formaldehyde release, causing harm to human health and the environment.

[0003] Chitosan is a natural polysaccharide, which has good biocompatibility, degradability and antibacterial performance, and has been widely concerned in the field of textile finishing in recent years. Chitosan molecules contain a large number of amino groups and hydroxyl groups, which can form hydrogen bonds with cellulose fibers, thereby imparting certain anti-wrinkle performance to the fabrics. However, the molecular weight of chitosan is generally large, and direct application in fabric finishing has problems such as uneven finishing effect. Therefore, it is necessary to modify chitosan to reduce its molecular weight. However, there are few studies on fabric anti-wrinkle finishing agents containing chitosan modified by natural products in the prior art. Therefore, the application provides a fabric anti-wrinkle finishing agent and a preparation method thereof. SUMMARY

[0004] The purpose of the application is to provide a fabric anti-wrinkle finishing agent and a preparation method thereof to solve the above problems.

[0005] The application achieves the above-mentioned purpose by the following technical solutions: The application provides a fabric anti-wrinkle finishing agent, which comprises the following preparation raw materials in mass percentage: modified chitosan 30-40%, citric acid 25-32%, tea tree essential oil 2-4%, dextrin 3-5%, sorbic acid 1-3%, glycerol 5-10%, and deionized water 13-27%; wherein the modified chitosan is a chitosan degradation product obtained by subjecting chitosan and papaya extract to an enzymatic degradation reaction and drying treatment.

[0006] As a further optimization scheme of the application, the mass ratio of chitosan to papaya extract is 1: (0.6-1.1).

[0007] The application also provides a preparation method of the fabric anti-wrinkle finishing agent, comprising the following steps: Step one, filtering and ultrafiltration treating the supernatant after ultrasonic extraction and centrifugal treatment of the papaya homogenate obtained by grinding the fruits of Tibetan papaya, and vacuum drying the ultrafiltration product to obtain a powder, which is the papaya extract; Step two, the chitosan is completely dissolved into the buffer solution to obtain a chitosan enzymatic hydrolysate, the chitosan enzymatic hydrolysate is heated to the enzyme degradation reaction temperature, then the papaya extract prepared in step one is added, constant temperature reaction is carried out for 1-1.5 hours, then the enzyme is inactivated by boiling water bath, the pH of the solution is adjusted to 8, and then the lower precipitate is obtained by standing and centrifugation, and the lower precipitate is washed, filtered, dried and ground to obtain the modified chitosan; Step three, the modified chitosan obtained in step two is mixed with citric acid, tea tree oil, dextrin, sorbic acid, glycerol and deionized water according to a proportion to obtain a fabric anti-wrinkle finishing agent.

[0008] As a further optimization scheme of the application, in step one, the ultrasonic extraction is specifically 450-550 W ultrasonic extraction for 8-12 min under the temperature condition of 6℃±2℃.

[0009] As a further optimization scheme of the application, in step one, the centrifugal treatment is specifically 3000-5000 r / min centrifugal treatment for 45-60 min under the temperature condition of 4℃±1℃.

[0010] As a further optimization scheme of the application, in step one, the filtration and ultrafiltration treatment is specifically that the upper clear liquid is first filtered by a filter with a pore size of 3 μm, and then the ultrafiltration product is obtained by using an ultrafiltration membrane with a molecular weight cut-off of 8000 Da for ultrafiltration treatment.

[0011] As a further optimization scheme of the application, in step two, the enzyme degradation reaction temperature is 40-48℃.

[0012] As a further optimization scheme of the application, in step three, when mixing, the temperature condition is 40-50℃.

[0013] The application has the following beneficial effects: The application provides a fabric anti-wrinkle finishing agent containing modified chitosan, wherein the modified chitosan is a chitosan degradation product obtained by enzyme degradation reaction and drying treatment of chitosan and papaya extract. DETAILED DESCRIPTION

[0014] It is necessary to point out here that the following detailed description is only used to further illustrate the application, and cannot be understood as limiting the protection scope of the application, and the skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0015] I. Materials 1. Fabric: Colored cotton cloth with a linear density of 16.25 tex × 16.25 tex; warp yarn count × weft yarn count of 545 yarns / 10 cm × 325 yarns / 10 cm; 2. Chitosan was purchased from Shanghai Blue Season Technology Development Co., Ltd. 3. Papain was purchased from Shanghai Bio Biotechnology Co., Ltd., with an enzyme activity of 3.6 ± 0.3 U / mg; 4. Acid cellulase was purchased from Wuhan Xinhuayang Biological Co., Ltd. with an enzyme activity of 3.5 ± 0.3 U / mg.

[0016] 5. Tibetan papaya ( Chaenomeles tibetica yu ) The origin is Linzhi City, Tibet Autonomous Region.

[0017] Unless otherwise specified, the methods used in this example are conventional methods known to those skilled in the art, and the raw materials and reagents used are commercially available unless otherwise specified.

[0018] 2. Methods The preparation method of the fabric anti-wrinkle finishing agent includes the following steps: (1) The papaya homogenate obtained by grinding the Tibetan papaya fruit is subjected to ultrasonic extraction at 450-550W (preferably 500W) at a temperature of 6℃±2℃ (preferably 4℃) for 8-12min (preferably 10min), and then the slurry is centrifuged at 3000-5000r / min (preferably 4500r / min) for 45-60min (preferably 50min) at a temperature of 4℃±1℃ (preferably 4℃). The supernatant is collected and first filtered through a filter with a pore size of 3μm, and then ultrafiltered through an ultrafiltration membrane with a molecular weight cutoff of 8000Da to obtain an ultrafiltration product, which is vacuum dried and ground into powder to obtain the papaya extract; (2) Chitosan was completely dissolved in a buffer solution (prepared by mixing 0.2 mol / L acetic acid solution and 0.1 mol / L sodium acetate solution, pH 5) to obtain a chitosan enzymatic hydrolyzate (chitosan mass concentration of 10 g / L), which was heated to an enzyme degradation reaction temperature of 40-48°C (preferably 45°C, the preferred scheme was adopted in the following experiments) and then added with the papaya extract prepared in step 1, with the mass ratio of chitosan to papaya extract being 1:(0.6-1.1). After constant temperature reaction for 1-1.5 hours, the enzyme was inactivated in a boiling water bath (preferably 1.2 hours). The pH of the solution was adjusted to 8, and the solution was centrifuged. The lower precipitate was washed, filtered, dried, and ground to obtain modified chitosan; (3) 30-40% of modified chitosan, 25-32% of citric acid, 2-4% of tea tree essential oil, 3-5% of dextrin, 1-3% of sorbic acid, 5-10% of glycerol, and 13-27% of deionized water by mass percentage are mixed uniformly (when mixing, the temperature condition is 40-50°C, and preferably 48°C) to obtain the fabric wrinkle-resistant finishing agent.

[0019] It should be noted that the preferred scheme is used in the following experiments.

[0020] In order to study the optimal component ratio of the fabric wrinkle-resistant finishing agent and the influence of modified chitosan prepared by different ratios of chitosan and papaya extract on the wrinkle resistance and color fastness of the fabric, the following experiments are set, as shown in Table 1 (Examples 1-3) and Table 2 (Examples 4-5 and the control group (pure cotton colored cloth without fabric wrinkle-resistant finishing agent treatment as the control group)), as follows: Table 1 Component ratio of fabric wrinkle-resistant finishing agent in Examples 1-3 ; Table 2 Component ratio of fabric wrinkle-resistant finishing agent in Examples 4-5 ; I. Test Fabric wrinkle-resistant finishing agent treatment: the fabric (10cm x 50cm pure cotton colored cloth) is immersed in the fabric wrinkle-resistant finishing agent, and is double-immersed and double-rolled (roll-off rate 80%), and the immersed and rolled fabric is baked at 110°C for 8min, washed with 50°C warm water, then washed with cold water, and dried for standby.

[0021] Wrinkle resistance test: the wrinkle recovery angle of the fabric treated with the fabric wrinkle-resistant finishing agent is detected according to the detection method of GB / T 3819-1997 "Textiles - Determination of the crease recovery of fabrics - Recovery angle method", and the detection results are shown in Table 3: Table 3 Detection results of fabric wrinkle recovery angle ; Sweat fastness test: the sweat fastness of the fabric treated with the fabric wrinkle-resistant finishing agent is detected according to the detection method of GB / T 3922-2013 "Textiles - Color fastness test - Sweat fastness", and the gray sample card for color change evaluation GB250 is used, which is divided into nine grades, i.e. 5, 4-5, 4, 3-4, 3, 2-3, 2, 1-2, and 1, wherein 1 is the worst color fastness performance; 5 is the best color fastness performance.

[0022] Table 4 Detection results of fabric sweat fastness ; The experimental conclusion is that the fabric treated by the fabric anti-wrinkle finishing agent of Example 4 is obviously superior to other examples in terms of anti-wrinkle performance and sweat stain fastness performance, which shows that Example 4 is the optimal example.

[0023] On this basis, in order to study the influence of other modified chitosan or unmodified chitosan on the anti-wrinkle performance and color fastness performance of the fabric, Comparative Examples 1-4 and a control group are also set up, as follows: Comparative Example 1 In this comparative example, the same amount of unmodified chitosan is used to replace the modified chitosan, as follows: The preparation method of the fabric anti-wrinkle finishing agent includes the following processes, by mass percentage, chitosan 36%, citric acid 28%, tea tree oil 3%, dextrin 4%, sorbic acid 2%, glycerol 6%, and deionized water 21%. After mixing according to the proportion (the temperature condition during mixing is 48°C), the fabric anti-wrinkle finishing agent is obtained.

[0024] Comparative Example 2 In this comparative example, the same amount of papain is used to replace the papaya extract, as follows: The preparation method of the fabric anti-wrinkle finishing agent includes the following processes, (1) Chitosan is completely dissolved in a buffer solution (obtained by mixing 0.2 mol / L acetic acid solution and 0.1 mol / L sodium acetate solution, with pH of 5) to obtain chitosan enzymatic hydrolysate (chitosan mass concentration of 10 g / L), which is heated to the enzyme degradation reaction temperature (45°C) and then papain is added, with the mass ratio of chitosan to papain being 1:0.9. After constant temperature reaction for 1.2 h, the enzyme is inactivated by boiling water bath, the solution pH is adjusted to 8, and the lower precipitate is obtained after standing and centrifugation, washed, suction filtered, dried, ground and pulverized to obtain modified chitosan; (2) By mass percentage, prepare modified chitosan 36%, citric acid 28%, tea tree oil 3%, dextrin 4%, sorbic acid 2%, glycerol 6%, and deionized water 21%. After mixing according to the proportion (the temperature condition during mixing is 48°C), the fabric anti-wrinkle finishing agent is obtained.

[0025] Comparative Example 3 In this comparative example, the same amount of acid cellulase is used to replace the papaya extract, as follows: The preparation method of the fabric anti-wrinkle finishing agent includes the following processes, (1) chitosan is completely dissolved in a buffer solution (obtained by mixing 0.2 mol / L acetic acid solution and 0.1 mol / L sodium acetate solution, pH is 5) to obtain a chitosan enzymatic hydrolysate (chitosan mass concentration is 10 g / L), which is heated to the enzyme degradation reaction temperature (45℃) and then the acidic cellulase is added, the mass ratio of chitosan to acidic cellulase is 1:0.9, constant temperature reaction for 1.2h, then boiling water bath enzyme inactivation, adjust the solution pH to 8, stand and centrifuge, take the lower precipitate, wash, suction filtration, dry, grind and crush to obtain modified chitosan; (2) 36% of modified chitosan, 28% of citric acid, 3% of tea tree essential oil, 4% of dextrin, 2% of sorbic acid, 6% of glycerol and 21% of deionized water are prepared in mass percentage, and then mixed uniformly (the temperature condition during mixing is 48℃) to obtain the fabric anti-wrinkle finishing agent.

[0026] Comparative Example 4 In this comparative example, the same mass of deionized water is used to replace the modified chitosan, and the preparation method is as follows: The preparation method of the fabric anti-wrinkle finishing agent comprises the following process: 28% of citric acid, 3% of tea tree essential oil, 4% of dextrin, 2% of sorbic acid, 6% of glycerol and 57% of deionized water are prepared in mass percentage, and then mixed uniformly (the temperature condition during mixing is 48℃) to obtain the fabric anti-wrinkle finishing agent.

[0027] The fabric is treated by using the fabric anti-wrinkle finishing agents of Comparative Examples 1-4 by the same treatment method, and the performance of the treated fabric is tested by using the same anti-wrinkle performance test and sweat fastness test, and the results are shown in Table 5: Table 5: Detection results of fabric wrinkle recovery angle and sweat fastness ; Experimental conclusion: through data comparison, it can be known that the modified chitosan obtained by enzyme degradation reaction and drying treatment of chitosan and papaya extract is added to the fabric anti-wrinkle finishing agent system, which has the effect of significantly improving the anti-wrinkle performance and color fastness performance of the fabric; but if the papaya extract is replaced by papain or acidic cellulase, the anti-wrinkle performance and color fastness performance of the fabric will be significantly reduced, especially the sweat acid stain fastness, thus it is inferred that there may be a synergistic effect between the papaya extract and the chitosan.

[0028] The above examples only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A wrinkle-resistant finishing agent for fabrics, characterized by: The invention comprises the following raw materials in percentage by mass: 30-40% modified chitosan, 25-32% citric acid, 2-4% tea tree essential oil, 3-5% dextrin, 1-3% sorbic acid, 5-10% glycerol, and 13-27% deionized water; wherein the modified chitosan is a chitosan degradation product obtained by enzymatic degradation reaction of chitosan and papaya extract and drying treatment.

2. The anti-wrinkle finishing agent for fabrics according to claim 1, characterized in that: The mass ratio of the chitosan to the papaya extract is 1:(0.6-1.1).

3. A method for preparing the anti-wrinkle finishing agent for fabrics according to any one of claims 1-2, characterized in that: The following steps are involved: Step 1: Grind the papaya fruit to obtain a papaya homogenate, perform ultrasonic extraction, and perform centrifugal treatment on the supernatant, filter and ultrafilter to obtain an ultrafiltration product, vacuum dry the ultrafiltration product, and grind it into a powder to obtain the papaya extract; Step 2: Completely dissolve chitosan in a buffer solution to obtain a chitosan enzymatic hydrolyzate, heat the solution to the enzyme degradation reaction temperature, add the papaya extract prepared in step 1, react at a constant temperature for 1-1.5 hours, and then inactivate the enzyme in a boiling water bath. Adjust the pH of the solution to 8, centrifuge, remove the lower precipitate, wash, filter, dry, and grind to obtain modified chitosan; Step 3: Mix the modified chitosan obtained in step 2 with citric acid, tea tree essential oil, dextrin, sorbic acid, glycerin, and deionized water in proportion to obtain an anti-wrinkle finishing agent for fabrics.

4. The method for preparing an anti-wrinkle finishing agent for fabrics according to claim 3, wherein: In step 1, the ultrasonic extraction is specifically performed at a temperature of 6°C ± 2°C and 450-550W for 8-12 minutes.

5. The method for preparing an anti-wrinkle finishing agent for fabrics according to claim 3, wherein: In step 1, the centrifugation is specifically performed at a temperature of 4°C±1°C and a speed of 3000-5000 r / min for 45-60 min.

6. The method for preparing an anti-wrinkle finishing agent for fabrics according to claim 3, characterized in that: In step 1, the filtration and ultrafiltration treatment is specifically as follows: the supernatant is first filtered through a filter with a pore size of 3 μm, and then ultrafiltered through an ultrafiltration membrane with a molecular weight cutoff of 8000 Da to obtain an ultrafiltration product.

7. The method for preparing an anti-wrinkle finishing agent for fabrics according to claim 3, characterized in that: In step 2, the enzymatic degradation reaction temperature is 40-48°C.

8. The method for preparing an anti-wrinkle finishing agent for fabrics according to claim 3, wherein: In step 3, the temperature during mixing is 40-50°C.