Denaturing agent for viscose fiber production

Abstract

The invention relates to the technical field of viscose fibers, in particular to a denaturant for viscose fiber production. The main component of the denaturant for viscose fiber production is N-tallow propylene diamine polyoxyethylene ether, and regeneration of cellulose xanthate can be inhibited; the invention also discloses an optimal formula which is a mixture of N-tallow propane diamine polyoxyethylene ether, polyethylene glycol and water, the polyethylene glycol can improve the water solubility of the N-tallow propane diamine polyoxyethylene ether, the water can reduce the viscosity of the formula, and the formula is convenient for industrial use. The denaturant disclosed by the invention can greatly improve the quality of a viscose solution, and compared with the existing denaturant, the spinning performance of the viscose solution added with the denaturant disclosed by the invention is obviously improved, and the production efficiency and the product quality of viscose are obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of viscose fibers, and in particular to a denaturant used for viscose fiber production. Background Art

[0002] The chemical reaction of the viscose process is based on a simple reaction of alkali cellulose with protonic carbon disulfide to obtain xanthate. Cellulose xanthate is dissolved in dilute caustic soda to obtain a viscose solution, which is squeezed into an acid bath through fine spinnerets to regenerate cellulose into filaments, the so-called viscose fibers. In the production process of viscose fibers, the addition of various chemical additives has a relatively significant effect on improving the production process and improving the quality of the finished product.

[0003] Certain additives are added to the viscose solution before spinning. The physical properties of the fibers spun from the denatured viscose in this way are improved (high strength, high wet modulus, etc.). These additives are collectively referred to as denaturants according to their characteristics. Denaturants can inhibit the regeneration of cellulose xanthate, adjust the diffusion rate of the coagulant component in the longitudinal velocity field, the formation rate of macromolecular aggregates and the proportional relationship of the precipitation rate, delay cellulose regeneration, promote the increase of fiber cortex thickness, improve fiber orientation, enable the primary fiber to withstand greater stretching, and significantly improve the physical and mechanical properties of the fiber.

[0004] There are many types of denaturants, which can be mainly classified into the following categories: fatty amines and cyclic fatty amines, polyamine compounds, polyoxyethylene and its condensation products with fatty amines, fatty alcohols, fatty acids or amides, ethanedithiol, imidazole and its derivatives. Among them, amine compounds and polyoxyethylene derivatives are the main ones, most of which are cationic or amphoteric surfactants, and the active groups at their ends can effectively inhibit the penetration of hydrogen ions into the gel and delay the formation of cellulose xanthate.

[0005] With the rapid development of China's textile industry, the demand for high-performance viscose fibers has continued to increase, driving the continued growth of the viscose fiber denaturant market. However, the performance of existing denaturants is still not high. Therefore, the development of a new generation of high-performance denaturants is conducive to improving viscose fiber production efficiency and product quality, and promoting industrial upgrading. Summary of the invention

[0006] The purpose of the present invention is to overcome the disadvantages of the prior art and provide a high-performance denaturant for viscose fiber production.

[0007] The object of the present invention is achieved by the following technical scheme: A denaturant for viscose fiber production, containing at least N-tallow propylene diamine polyoxyethylene ether, the chemical structure of which is shown in formula (I):

[0008]

[0009] Wherein, x, y and z are all positive integers, and x+y+z=10.

[0010] As a preferred technical solution, it also includes polyethylene glycol and water.

[0011] As a preferred technical solution, it is composed of the following raw materials in parts by weight: 60-85 parts of N-tallow propylene diamine polyoxyethylene ether, 10-30 parts of polyethylene glycol, and 5-10 parts of water.

[0012] As a more preferred technical solution, it is composed of the following raw materials in parts by weight: 60 parts of N-tallow propylene diamine polyoxyethylene ether, 30 parts of polyethylene glycol, and 10 parts of water.

[0013] As a preferred technical solution, the polyethylene glycol is at least one of PEG-200, PEG-300, PEG-400, PEG-600, PEG-800, PEG-1000, PEG-1500, PEG-2000 or PEG-3000.

[0014] As a preferred technical solution, the usage amount of the denaturant is 0.05-5% of the mass of cellulose.

[0015] The present invention has the following advantages: the present invention discloses a high-performance denaturant for viscose fiber production, the main component of which is N-tallow propylene diamine polyoxyethylene ether, which can inhibit the regeneration of cellulose xanthate; the present invention also discloses an optimal formula, which is a mixture of N-tallow propylene diamine polyoxyethylene ether, polyethylene glycol and water, wherein polyethylene glycol can improve the water solubility of N-tallow propylene diamine polyoxyethylene ether, and water can reduce the viscosity of the formula, which is convenient for industrial use. The denaturant disclosed by the present invention can greatly improve the quality of the viscose solution. Compared with the existing denaturant, the spinning performance of the viscose solution after adding the denaturant of the present invention is significantly improved, and the production efficiency and product quality of the viscose fiber are significantly improved. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with embodiments, and the protection scope of the present invention is not limited to the following:

[0017] Example 1: A denaturant for viscose fiber production, which is composed of the following raw materials in parts by weight: 60 parts of N-tallow propylene diamine polyoxyethylene ether, 10 parts of polyethylene glycol, and 5 parts of water.

[0018] Among them, the chemical structure of N-tallow propylene diamine polyoxyethylene ether is shown in formula (I):

[0019]

[0020] In the formula, x+y+z=10, and during production, the molar ratio of N-tallow propylene diamine to ethylene oxide is 1:10 to obtain x+y+z=10;

[0021] The polyethylene glycol is PEG-200. When used, the substances in the formula are mixed and stirred evenly, and the denaturant is added to the viscose solution before spinning. The amount of the denaturant used is 0.05% of the mass of cellulose.

[0022] Embodiment 2: A denaturant for viscose fiber production, which is composed of the following raw materials in parts by weight:

[0023] N-tallow propylene diamine polyoxyethylene ether: 60, polyethylene glycol: 30, water: 10.

[0024] Among them, the chemical structure of N-tallow propylene diamine polyoxyethylene ether is shown in formula (I):

[0025]

[0026] In the formula, x+y+z=10, and during production, the molar ratio of N-tallow propylene diamine to ethylene oxide is 1:10 to obtain x+y+z=10;

[0027] The polyethylene glycol is a mixture of PEG-300 and PEG-400, and the weight ratio is 1:1; when used, the substances in the formula are mixed and stirred evenly, and the denaturant is added to the viscose solution before spinning. The amount of the denaturant used is 5% of the mass of cellulose.

[0028] Example 3: A denaturant for viscose fiber production, which is composed of the following raw materials in parts by weight: 85 parts of N-tallow propylene diamine polyoxyethylene ether, 10 parts of polyethylene glycol, and 5 parts of water.

[0029] Among them, the chemical structure of N-tallow propylene diamine polyoxyethylene ether is shown in formula (I):

[0030]

[0031] In the formula, x+y+z=10, and during production, the molar ratio of N-tallow propylene diamine to ethylene oxide is 1:10 to obtain x+y+z=10;

[0032] The polyethylene glycol is a mixture of PEG-600, PEG-800 and PEG-1000, and the weight ratio is 2:1:1; when used, the substances in the formula are mixed and stirred evenly, and the denaturant is added to the viscose solution before spinning. The usage amount of the denaturant is 0.3% of the mass of cellulose.

[0033] Example 4: A denaturant for viscose fiber production, which is composed of the following raw materials in parts by weight: 72 parts of N-tallow propylene diamine polyoxyethylene ether, 20 parts of polyethylene glycol, and 8 parts of water.

[0034] Among them, the chemical structure of N-tallow propylene diamine polyoxyethylene ether is shown in formula (I):

[0035]

[0036] In the formula, x+y+z=10, and during production, the molar ratio of N-tallow propylene diamine to ethylene oxide is 1:10 to obtain x+y+z=10;

[0037] The polyethylene glycol is a mixture of PEG-2000 and PEG-3000, and the weight ratio is 3:2; when used, the substances in the formula are mixed and stirred evenly, and the denaturant is added to the viscose solution before spinning. The amount of the denaturant used is 3% of the mass of cellulose.

[0038] The beneficial effects of the present invention are described below by experiments:

[0039] 1. Experimental methods:

[0040] Before spinning, the denaturant of Example 3 was added to the viscose solution, wherein N-tallow propylene diamine polyoxyethylene ether (x+y+z=10) (ADT-10) was a commercially available product (Shandong Xingguang Chemical Co., Ltd.), and the denaturant accounted for 0.3% of the cellulose mass; the viscose solution without adding the denaturant was used as the control group.

[0041] 2. Experimental results:

[0042] (1) Viscose solution quality assessment test

[0043] The quality of viscose solution is mainly evaluated by the following methods: the viscosity of viscose is measured by falling ball viscometer method; the degree of maturity is tested by ammonium chloride method; the number of undissolved particles is determined by observation under a microscope with a 10x objective lens, and the number of particles larger than 15um is recorded, and the average value of multiple fields of view is calculated; the filterability is determined by the volume (cm2) of viscose with a height of 300mm passing through a metal filter (200 mesh, diameter 38mm) within 10 minutes. 3 ) to characterize, the test results are shown in Table 1:

[0044] Table 1: Results of viscose solution quality assessment test

[0045]

[0046] It can be seen from Table 1 that the addition of the denaturant of the present invention greatly improves the quality of the viscose solution.

[0047] (2) Fiber quality evaluation test

[0048] The viscose solution was spun and the fiber properties were tested. The results are shown in Table 2:

[0049] Table 2: Fiber quality evaluation test results

[0050]

[0051] It can be seen from Table 2 that the spinning performance of the viscose solution to which the denaturant of the present invention is added is significantly improved.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which are all covered by the protection scope of the present invention.

Claims

1. A denaturant for viscose fiber production, characterized in that: At least contains N-tallow propylene diamine polyoxyethylene ether, and the chemical structure of the N-tallow propylene diamine polyoxyethylene ether is shown in formula (I): Wherein, x, y and z are all positive integers, and x+y+z=10.

2. A denaturant for viscose fiber production according to claim 1, characterized in that: It also includes polyethylene glycol and water.

3. A denaturant for viscose fiber production according to claim 2, characterized in that: The invention is composed of the following raw materials in parts by weight: 60-85 parts of N-tallow propylene diamine polyoxyethylene ether, 10-30 parts of polyethylene glycol and 5-10 parts of water.

4. A denaturant for viscose fiber production according to claim 2, characterized in that: The invention is composed of the following raw materials in parts by weight: 60 parts of N-tallow propylene diamine polyoxyethylene ether, 30 parts of polyethylene glycol and 10 parts of water.

5. A denaturant for viscose fiber production according to claim 3 or 4, characterized in that: The polyethylene glycol is at least one of PEG-200, PEG-300, PEG-400, PEG-600, PEG-800, PEG-1000, PEG-1500, PEG-2000 or PEG-3000.

6. The denaturant for viscose fiber production according to claim 1, characterized in that: The usage amount of the denaturant is 0.05-5% of the mass of cellulose.

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