Cotton fabric pretreatment refining agent and application thereof

Abstract

The invention belongs to the technical field of textile auxiliaries, and discloses a cotton fabric pretreatment refining agent and application thereof. The cotton fabric pretreatment refining agent comprises the following components in parts by mass: 6-15 parts of a zwitterionic surfactant, 5-10 parts of an anionic surfactant, 2 parts of a chelating agent, 1 part of a defoaming agent and 72-86 parts of water, wherein the zwitterionic surfactant is a betaine type surfactant, and the anionic surfactant is fatty alcohol polyoxyethylene ether carboxylic acid. The environment-friendly betaine type surfactant and fatty alcohol-polyoxyethylene ether carboxylic acid are selected as main active matters, so that the refining agent which is easy to biodegrade and has the characteristics of high permeability, strong alkali resistance, low foaming and easy defoaming is obtained. The refining agent disclosed by the invention not only has a high refining effect, but also is non-toxic and harmless to the environment and operators, and can play roles in saving energy, reducing emission and improving efficiency in the actual refining process.

Description

Technical Field

[0001] This invention relates to the field of textile auxiliaries technology, and more particularly to a cotton fabric pretreatment refining agent and its application. Background Technology

[0002] Traditional cotton fabric pretreatment processes include desizing, scouring, and bleaching, which are completed in three separate steps. This process is cumbersome, inefficient, and energy-intensive, and is gradually being replaced by a shorter, one-step desizing, scouring, and bleaching process. While the one-step process offers advantages such as a shorter process time and higher energy efficiency, traditional refining agents exhibit drawbacks in this method, including excessive foaming and poor permeability. Therefore, the one-step process places higher demands on the performance of refining agents, requiring them to possess excellent permeability, resistance to strong alkalis, and low foaming and easy defoaming properties.

[0003] With increasingly stringent environmental regulations, the textile industry is demanding higher standards for auxiliaries that are green, non-toxic, and readily biodegradable, thereby reducing their negative environmental impact. Therefore, while meeting refining requirements, refining agents must simultaneously possess excellent permeability, resistance to strong alkalis, low foaming, easy defoaming, and be non-toxic and harmless to the environment and operators. Summary of the Invention

[0004] The purpose of this invention is to provide a cotton fabric pretreatment refining agent and its application, so as to solve the shortcomings of traditional refining agents such as excessive foaming, poor permeability and poor resistance to strong alkalis.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] This invention provides a cotton fabric pretreatment refining agent, comprising the following components by mass parts:

[0007] The mixture contains 6-15 parts of amphoteric surfactant, 5-10 parts of anionic surfactant, 1.5-2.5 parts of chelating agent, 0.5-1.5 parts of defoamer, and 71-87 parts of water.

[0008] The zwitterionic surfactant is a betaine-type surfactant;

[0009] The anionic surfactant is fatty alcohol polyoxyethylene ether carboxylic acid.

[0010] Preferably, in the above-mentioned cotton fabric pretreatment refining agent, the betaine-type surfactant includes one or both of cocamidopropyl betaine and N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine.

[0011] Preferably, in the above-mentioned cotton fabric pretreatment refining agent, the fatty alcohol polyoxyethylene ether carboxylic acid has the structural formula shown in Formula I or Formula II:

[0012]

[0013] Wherein, R is an isomeric tridecylalkyl group, and n is 5 to 9;

[0014]

[0015] Where n is 5 to 9, a is 3 to 4, and b is 6 to 7.

[0016] Preferably, in the above-mentioned cotton fabric pretreatment refining agent, the chelating agent includes EDTA and sodium citrate.

[0017] Preferably, in the above-mentioned cotton fabric pretreatment refining agent, the mass ratio of EDTA to sodium citrate is 1.5-2.5:0.5-1.5.

[0018] Preferably, in the above-mentioned cotton fabric pretreatment refining agent, the defoamer includes polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane.

[0019] Preferably, in the above-mentioned cotton fabric pretreatment refining agent, the mass ratio of polyoxypropyl polyoxyethyl glycerol ether to polyether-modified polysiloxane is 2.5-3.5:1.5-2.5.

[0020] The present invention also provides an application of a cotton fabric pretreatment refining agent in the pretreatment of cotton fabrics, wherein sodium hydroxide, hydrogen peroxide solution, cotton fabric pretreatment refining agent and water are prepared into a working solution to pretreat cotton fabrics.

[0021] Preferably, in the application of the above-mentioned cotton fabric pretreatment refining agent in the pretreatment of cotton fabrics, the concentration of hydrogen peroxide in the working solution is 5.5-6.5 g / L;

[0022] The concentration of the cotton fabric pretreatment refining agent in the working solution is 0.5–1.5 g / L.

[0023] Preferably, in the application of the above-mentioned cotton fabric pretreatment refining agent in the pretreatment of cotton fabrics, the pH value of the working solution is 10-12.

[0024] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0025] This invention selects environmentally friendly betaine-type surfactants and fatty alcohol polyoxyethylene ether carboxylic acids as the main active ingredients. Both types of surfactants are green surfactants with readily biodegradable properties. As amphiphilic molecules, both surfactants have adsorption and penetration effects. After compounding, the two types of surfactants work synergistically to obtain a refining agent that is not only readily biodegradable but also has high penetration, resistance to strong alkalis, low foaming, and easy defoaming characteristics. The refining agent of this invention not only has a high refining effect but is also non-toxic and harmless to the environment and operators. Furthermore, it can play a role in energy saving, emission reduction, and efficiency improvement during actual refining processes. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0027] Figure 1 This is a photograph of the cotton fabric pretreatment refining agent used in Example 1. Detailed Implementation

[0028] This invention provides a cotton fabric pretreatment refining agent, comprising the following components by mass parts:

[0029] The mixture contains 6-15 parts of amphoteric surfactant, 5-10 parts of anionic surfactant, 1.5-2.5 parts of chelating agent, 0.5-1.5 parts of defoamer, and 71-87 parts of water.

[0030] In this invention, the zwitterionic surfactant is preferably 6 to 15 parts by mass, more preferably 8 to 13 parts, and even more preferably 10 to 11 parts by mass.

[0031] In this invention, the anionic surfactant is preferably 5 to 10 parts by mass, more preferably 6 to 9 parts, and even more preferably 7 to 8 parts by mass.

[0032] In this invention, the chelating agent is preferably 1.5 to 2.5 parts by mass, more preferably 1.8 to 2.2 parts by mass, and even more preferably 2 parts by mass.

[0033] In this invention, the defoamer is preferably 0.5 to 1.5 parts by mass, more preferably 0.8 to 1.2 parts by mass, and even more preferably 1 part by mass.

[0034] In this invention, the water is in the form of 71 to 87 parts by mass, preferably 73 to 85 parts, more preferably 74 to 83 parts, and even more preferably 76 to 81 parts by mass.

[0035] In this invention, the zwitterionic surfactant is preferably a betaine-type surfactant.

[0036] In this invention, the betaine-type surfactant includes one or both of cocamidopropyl betaine and N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine.

[0037] In this invention, the structural formula of cocamidopropyl betaine is as follows:

[0038]

[0039] In this invention, the structural formula of N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine is as follows:

[0040]

[0041] In this invention, the anionic surfactant is preferably fatty alcohol polyoxyethylene ether carboxylic acid.

[0042] In this invention, the structural formula of the fatty alcohol polyoxyethylene ether carboxylic acid is shown in Formula I or Formula II:

[0043]

[0044] Wherein, R is preferably isotridecylalkyl; n is preferably 5 to 9, more preferably 6 to 8, and more preferably 7;

[0045] Formula I is an isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid;

[0046]

[0047] Wherein, m is preferably 5 to 9, more preferably 6 to 8, and even more preferably 7; a is preferably 3 to 4, and even more preferably 3; b is preferably 6 to 7, and even more preferably 6;

[0048] Formula II is C 12 ~C 14 Secondary alcohol polyoxyethylene ether carboxylic acid.

[0049] In this invention, the chelating agent includes EDTA and sodium citrate; the chelating agent can adjust the pH and improve water quality.

[0050] In this invention, the mass ratio of EDTA to sodium citrate is preferably 1.5-2.5:0.5-1.5, more preferably 1.8-2.2:0.8-1.3; and even more preferably 2:1.

[0051] In this invention, the defoamer includes polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane.

[0052] In this invention, the mass ratio of the polyoxypropyl polyoxyethyl glycerol ether to the polyether-modified polysiloxane is preferably 2.5-3.5:1.5-2.5, more preferably 2.8-3.2:1.8-2.2, and even more preferably 3:2.

[0053] In this invention, the preparation method of the cotton fabric pretreatment refining agent is to physically mix amphoteric surfactant, anionic surfactant, chelating agent, defoamer and water.

[0054] The present invention also provides an application of a cotton fabric pretreatment refining agent in the pretreatment of cotton fabrics, wherein sodium hydroxide, hydrogen peroxide solution, cotton fabric pretreatment refining agent and water are prepared into a working solution to pretreat cotton fabrics.

[0055] In this invention, the concentration of the hydrogen peroxide solution is preferably 28-32 wt%, more preferably 29-31 wt%, and even more preferably 30 wt%.

[0056] In this invention, the concentration of hydrogen peroxide in the working solution is preferably 5.5-6.5 g / L, more preferably 5.7-6.2 g / L, and even more preferably 6 g / L.

[0057] In this invention, the concentration of the cotton fabric pretreatment refining agent in the working solution is preferably 0.5-1.5 g / L, more preferably 0.6-1.2 g / L, and even more preferably 1 g / L.

[0058] In this invention, the pH value of the working solution is preferably 10 to 12, more preferably 10.5 to 11.5, and even more preferably 11.

[0059] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] Example 1

[0061] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0062] 6 parts cocamidopropyl betaine, 5 parts isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid (n=5), 2 parts chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 86 parts water.

[0063] The structural formula of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid is as follows:

[0064] R is an isomeric tridecylalkyl group, and n is 5.

[0065] The above-mentioned cotton fabric pretreatment refining agent is shown in the following figure. Figure 1 As shown. By Figure 1 It can be seen that the cotton fabric pretreatment refining agent has a uniform and transparent appearance and stable properties.

[0066] Example 2

[0067] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0068] 6 parts of N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine, 8 parts of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid (n=7), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 83 parts of water;

[0069] The structural formula of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid is as follows:

[0070] R is an isomeric tridecylalkyl group, and n is 7.

[0071] Example 3

[0072] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0073] 6 parts cocamidopropyl betaine, 10 parts isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid (n=9), 2 parts chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 81 parts water.

[0074] The structural formula of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid is as follows:

[0075] R is an isomeric tridecylalkyl group, and n is 9.

[0076] Example 4

[0077] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0078] 15 parts of N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine, C 12 ~C 145 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=5), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 77 parts of water.

[0079] Among them, C 12 ~C 14 The structural formula of secondary alcohol polyoxyethylene ether carboxylic acid is as follows:

[0080] m is 5, a is 3, and b is 6.

[0081] Example 5

[0082] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0083] 15 parts of cocamidopropyl betaine, C 12 ~C 14 8 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=7), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 74 parts of water.

[0084] Among them, C 12 ~C 14 The structural formula of secondary alcohol polyoxyethylene ether carboxylic acid is as follows:

[0085] m is 7, a is 4, and b is 7.

[0086] Example 6

[0087] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0088] 15 parts of N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine, C 12 ~C 14 10 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=9), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 72 parts of water.

[0089] Among them, C 12 ~C 14 The structural formula of secondary alcohol polyoxyethylene ether carboxylic acid is as follows:

[0090] m is 9, a is 3, and b is 6.

[0091] Example 7

[0092] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0093] 15 parts of cocamidopropyl betaine, C 12 ~C 14 5 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=5), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 82 parts of water.

[0094] Among them, C 12 ~C 14 The structural formula of secondary alcohol polyoxyethylene ether carboxylic acid is as follows:

[0095] m is 5, a is 4, and b is 7.

[0096] Example 8

[0097] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0098] 10 parts of N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine, C 12 ~C 14 8 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=7), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 79 parts of water.

[0099] Among them, C 12 ~C 14 The structural formula of secondary alcohol polyoxyethylene ether carboxylic acid is as follows:

[0100] m is 7, a is 3, and b is 6.

[0101] Example 9

[0102] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0103] 10 parts of cocamidopropyl betaine, C 12 ~C 14 10 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=9), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 77 parts of water.

[0104] Among them, C 12 ~C 14The structural formula of secondary alcohol polyoxyethylene ether carboxylic acid is as follows:

[0105] m is 9, a is 4, and b is 7.

[0106] Example 10

[0107] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0108] 13 parts of N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine, 5 parts of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid (n=5), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 79 parts of water;

[0109] The structural formula of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid is as follows:

[0110] R is an isomeric tridecylalkyl group, and n is 5.

[0111] Example 11

[0112] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0113] 13 parts cocamidopropyl betaine, 8 parts isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid (n=7), 2 parts chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 76 parts water.

[0114] The structural formula of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid is as follows:

[0115] R is an isomeric tridecylalkyl group, and n is 7.

[0116] Example 12

[0117] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0118] 13 parts of N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine, 10 parts of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid (n=9), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 74 parts of water;

[0119] The structural formula of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid is as follows:

[0120] R is an isomeric tridecylalkyl group, and n is 9.

[0121] Example 13

[0122] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0123] 10 parts cocamidopropyl betaine, 5 parts isotridecyl alcohol polyoxyethylene ether carboxylic acid (n=5), 5 parts isotridecyl alcohol polyoxyethylene ether carboxylic acid (n=7), 2 parts chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 77 parts water;

[0124] The structural formula of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid is as follows:

[0125] R is an isomeric tridecylalkyl group, and n is 5 or 7.

[0126] Example 14

[0127] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0128] 10 parts of N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine, 10 parts of anionic surfactant (5 parts of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid (n=5), C 12 ~C 14 Secondary alcohol polyoxyethylene ether carboxylic acid (n=7) 5 parts, chelating agent (EDTA and sodium citrate in a mass ratio of 2:1) 2 parts, defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether modified polysiloxane in a mass ratio of 3:2) 1 part, water 77 parts.

[0129] The structural formula of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid is as follows:

[0130] R is an isomeric tridecylalkyl group, and n is 5;

[0131] C 12 ~C 14 The structural formula of secondary alcohol polyoxyethylene ether carboxylic acid is as follows:

[0132] m is 7, a is 3, and b is 6.

[0133] Example 15

[0134] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0135] 10 parts cocamidopropyl betaine, 10 parts anionic surfactant (C 12 ~C 14 3 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=5), C 12 ~C 14 3 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=7), C 12 ~C 14 4 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=9), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 77 parts of water.

[0136] The structural formula of the anionic surfactant is as follows:

[0137] m is 5, 7, or 9, a is 4, and b is 7.

[0138] Example 16

[0139] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0140] 7 parts cocamidopropyl betaine, 8 parts N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine, C 12 ~C 14 9 parts of secondary alcohol polyoxyethylene ether carboxylic acid (n=7), 2 parts of chelating agent (EDTA and sodium citrate in a mass ratio of 2:1), 1 part of defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2), and 73 parts of water.

[0141] Among them, C 12 ~C 14 The structural formula of secondary alcohol polyoxyethylene ether carboxylic acid is as follows:

[0142] m is 9, a is 3, and b is 6.

[0143] Example 17

[0144] A cotton fabric pretreatment refining agent comprises the following components by mass parts:

[0145] Cocamidopropyl betaine 9 parts, N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine 6 parts, isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid (n=7) 9 parts, chelating agent (EDTA and sodium citrate in a mass ratio of 2:1) 2 parts, defoamer (polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane in a mass ratio of 3:2) 1 part, water 73 parts;

[0146] The structural formula of isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid is as follows:

[0147] R is an isomeric tridecylalkyl group, and n is 7.

[0148] In Examples 1-17 above, isomeric tridecyl alcohol polyoxyethylene ether carboxylic acid, C 12 ~C 14 The secondary alcohol polyoxyethylene ether carboxylic acid were both commercially available products, purchased from the China Daily Chemical Industry Research Institute, with model numbers 5013 and 5014 respectively.

[0149] Performance testing

[0150] 1g of the cotton fabric pretreatment refining agent prepared in Examples 1-17 was dissolved in 1L of deionized water, and 6g of hydrogen peroxide solution (concentration of 30wt%) was added to each solution. Sodium hydroxide was added to make the pH of the solution 11 to obtain the working solution.

[0151] Capillary effect:

[0152] Select a cotton fabric with a size of 30mm×250mm, immerse it in the working solution with a bath ratio of 1:15, then keep it in a water bath at 98℃ for 40 minutes, remove the cotton fabric, wash it three times with hot water at 90℃, then wash it twice with deionized water at room temperature, dehydrate it and place it in an environment at 60℃ until it is dried, test the capillary effect of the treated cotton fabric for 30 minutes, and the results are shown in Table 1.

[0153] Foam performance testing:

[0154] Referring to GB / T7462 "Determination of Foaming Power of Surfactants - Modified Ross-Miles Method", the foam volume was measured after 500 mL of the refining agent solution prepared in Examples 1-17 was flowed from a height of 450 mm onto the surface of the same solution. The results are shown in Table 1.

[0155] Wetting performance test:

[0156] Referring to GB / T11983 "Determination of Wetting Power of Surfactants - Immersion Method", the wetting time was determined by measuring the time interval from immersion to initial sinking of a cotton cloth disc in the working solution. A shorter wetting time indicates better wetting performance. The test results are shown in Table 1.

[0157] Alkali resistance test:

[0158] Referring to GB / T5556 "Test Method for Alkali Resistance of Surfactants", the alkali resistance of the refining agents prepared in Examples 1 to 17 in NaOH aqueous solution was determined, and the results are shown in Table 1.

[0159] Table 1. Refining effects and performance test results of different cotton fabric pretreatment refining agents.

[0160]

[0161]

[0162]

[0163] As can be seen from the above embodiments, the cotton fabric pretreatment refining agent provided by the present invention has a uniform and transparent appearance and stable properties. Tests revealed that the wicking effect of fabrics treated with this refining agent can reach up to 11.5 cm, meeting national standards and demonstrating excellent refining performance. This refining agent exhibits low foaming and easy defoaming characteristics, which is beneficial for energy conservation and emission reduction. No stratification or oil floating phenomenon was observed when the refining agent was used at a NaOH concentration of 270 g / L, indicating that the refining agent has strong alkali resistance. Furthermore, the refining agent has good wetting properties, indicating that it has good penetration performance.

[0164] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cotton fabric pretreatment refining agent, characterized in that, The following components are included by mass parts: The mixture contains 6-15 parts of amphoteric surfactant, 5-10 parts of anionic surfactant, 1.5-2.5 parts of chelating agent, 0.5-1.5 parts of defoamer, and 71-87 parts of water. The zwitterionic surfactant is a betaine-type surfactant; The anionic surfactant is fatty alcohol polyoxyethylene ether carboxylic acid.

2. The cotton fabric pretreatment refining agent according to claim 1, characterized in that, The betaine-type surfactant includes one or both of cocamidopropyl betaine and N-lauryl-N,N-dimethyl-N-(2-hydroxy-3-sulfopropyl)ammonium sulfobetaine.

3. The cotton fabric pretreatment refining agent according to claim 2, characterized in that, The structural formula of the fatty alcohol polyoxyethylene ether carboxylic acid is shown in Formula I or Formula II: Wherein, R is an isomeric tridecylalkyl group, and n is 5 to 9; Where m is 5 to 9, a is 3 to 4, and b is 6 to 7.

4. The cotton fabric pretreatment refining agent according to claim 3, characterized in that, The chelating agents include EDTA and sodium citrate.

5. The cotton fabric pretreatment refining agent according to claim 4, characterized in that, The mass ratio of EDTA to sodium citrate is 1.5–2.5:0.5–1.

5.

6. The cotton fabric pretreatment refining agent according to claim 5, characterized in that, The defoamer includes polyoxypropyl polyoxyethyl glycerol ether and polyether-modified polysiloxane.

7. The cotton fabric pretreatment refining agent according to claim 5 or 6, characterized in that, The mass ratio of the polyoxypropyl polyoxyethyl glycerol ether to the polyether-modified polysiloxane is 2.5–3.5:1.5–2.

5.

8. The application of the cotton fabric pretreatment refining agent according to any one of claims 1 to 7 in the pretreatment of cotton fabrics, characterized in that, A working solution is prepared by mixing sodium hydroxide, hydrogen peroxide solution, cotton fabric pretreatment refining agent, and water to pretreat cotton fabrics.

9. The application of the cotton fabric pretreatment refining agent according to claim 8 in the pretreatment of cotton fabrics, characterized in that, The concentration of the hydrogen peroxide solution is 28–32 wt%. The concentration of hydrogen peroxide in the working solution is 5.5–6.5 g / L; The concentration of the cotton fabric pretreatment refining agent in the working solution is 0.5–1.5 g / L.

10. The application of the cotton fabric pretreatment refining agent according to claim 9 in the pretreatment of cotton fabrics, characterized in that, The working solution has a pH value of 10 to 12.

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