Method for rapid testing of contents of components in sodium alginate complex

Abstract

The application discloses a method for rapidly testing the content of each component in a sodium alginate compound, and comprises the following steps: S1: dissolving the sodium alginate compound with pure water to obtain a to-be-tested original paste, the dissolving concentration is 1%, the conductivity of the obtained to-be-tested original paste is A ms / cm, and the viscosity is b cp; S2: presetting the target viscosity of beating under room temperature as a, and calculating the beating concentration w according to a beating concentration formula; S3: determining the highest water hardness value of printing and dyeing water as n mg / L, and calculating the content z of sodium hexametaphosphate in the sodium alginate compound according to the amount of sodium hexametaphosphate required for neutralizing the content of calcium and magnesium ions in the water, wherein z=(3n÷10000)÷w÷100; S4: calculating the content x of sodium alginate according to the formula x=(11-A-7.5z)÷9, and calculating the content z of Yuanming powder according to y=1-x-z. Compared with an acidification method, the method can more accurately test the content of each component in an unknown printing and dyeing sodium alginate compound, the testing speed is faster, and the testing method is simpler.

Description

Technical Field

[0001] The invention belongs to the technical field of textile printing and dyeing, and particularly relates to a method for quickly testing the content of each component in a sodium alginate complex. Background Art

[0002] Sodium alginate complexes commonly used in the printing and dyeing industry are typically composed of sodium alginate, sodium sulfate, and sodium hexametaphosphate. Compared to preparing a stock paste by beating sodium alginate, sodium alginate complexes dissolve faster and are less likely to clump during dissolution. To obtain the most suitable sodium alginate complex ratio, it is usually necessary to purchase a variety of commercially available products for testing. After determining the most effective product, the product formula is deciphered to obtain a preliminary solution close to the optimal ratio. Based on this, experimental optimization is then conducted to determine the final product formula.

[0003] However, the commonly used method for measuring sodium alginate content currently employs an acidification method. First, a 1% concentration solution is prepared. Then, a portion of the solution is weighed and a certain concentration of hydrochloric acid is added to convert the sodium alginate into alginate fibers to precipitate. The alginate fibers are then filtered out and dehydrated with pure alcohol. The dehydrated alginate is then dried at a low temperature (less than 50°C) for more than 8 hours, which is time-consuming and laborious. In addition, when using the acidification method to test the sodium alginate content in a sodium alginate complex, we found that when the sodium alginate content in the sodium alginate complex is less than 15%, the alginate fibers formed after the addition of hydrochloric acid are not formed and cannot be filtered out. Consequently, the acidification method cannot measure the sodium alginate content when the sodium alginate content is less than 15%. Furthermore, the error of approximately 5% in measuring the sodium alginate content using the acidification method also affects the determination of the sodium alginate content.

[0004] Therefore, the traditional acidification method is difficult to adapt to the requirements of determining the content of sodium alginate and other components in sodium alginate complexes for printing and dyeing with unknown ratios. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a method for rapidly testing the content of various components in a sodium alginate complex. Compared to the acidification method, this method can more accurately measure the content of various components in a sodium alginate complex for printing and dyeing with unknown ratios, and the testing speed is faster and the testing method is simpler.

[0006] In order to achieve the above object, the present invention discloses a method for quickly testing the content of each component in a sodium alginate complex, wherein the sodium alginate complex is composed of sodium alginate, sodium sulfate and sodium hexametaphosphate, and the method comprises the following steps:

[0007] S1: dissolving the sodium alginate complex in pure water to obtain a test paste, with a dissolution concentration of 1%. Testing the test paste to obtain a conductivity of Ams / cm and a viscosity of bcp;

[0008] S2: The target viscosity of beating at room temperature is set to a, and the beating concentration w is calculated according to the beating concentration formula;

[0009] S3: Determine the maximum water hardness value of the printing and dyeing water as nmg / L, and calculate the content of sodium hexametaphosphate in the sodium alginate complex according to the amount of sodium hexametaphosphate required to neutralize the calcium and magnesium ions in the water: z = (3n ÷ 10000) ÷ w ÷ 100;

[0010] S4: Calculate the sodium alginate content x according to the formula x=(11-A-7.5z)÷9; calculate the sodium sulfate content y according to y=1-xz.

[0011] Preferably, the target viscosity of the beating is a=10000 cp.

[0012] Preferably, the beating concentration formula is w = (a÷0.9654÷b)∧(1÷3.2769)÷100.

[0013] Preferably, the water hardness value of the printing and dyeing water measured in step S3 in terms of CaCO3 is n=448 mg / L.

[0014] Preferably, step S1 is to test the conductivity of the original paste at 20°C.

[0015] Compared with existing technologies, the advantages and positive effects of the present invention are: it provides a method for rapidly testing the content of various components in a sodium alginate complex. Compared with the acidification method, this method can more accurately measure the content of various components in a sodium alginate complex for printing and dyeing with unknown ratios, and the testing speed is faster and the testing method is simpler. DETAILED DESCRIPTION

[0016] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that structures and features in one embodiment may be beneficially combined in other embodiments without further description.

[0017] A method for rapidly testing the content of each component in a sodium alginate complex, wherein the sodium alginate complex is composed of sodium alginate, sodium sulfate, and sodium hexametaphosphate. The method comprises the following steps:

[0018] S1: dissolving the sodium alginate complex in pure water to obtain a test paste, with a dissolution concentration of 1%. Testing the test paste to obtain a conductivity of Ams / cm and a viscosity of bcp;

[0019] S2: The target viscosity of beating at room temperature is set to a, and the beating concentration w is calculated according to the beating concentration formula;

[0020] S3: Determine the maximum water hardness value of the printing and dyeing water as nmg / L, and calculate the content of sodium hexametaphosphate in the sodium alginate complex according to the amount of sodium hexametaphosphate required to neutralize the calcium and magnesium ions in the water: z = (3n ÷ 10000) ÷ w ÷ 100;

[0021] S4: Calculate the sodium alginate content x according to the formula x=(11-A-7.5z)÷9; calculate the sodium sulfate content y according to y=1-xz.

[0022] Testing has shown that the conductivity of 1% sodium alginate in pure water at 20°C is 2 ms / cm, the conductivity of 1% sodium sulfate is 11 ms / cm, and the conductivity of 1% sodium hexametaphosphate is 3.5 ms / cm. Therefore, the conductivity of the original paste obtained in step S1 is A = 2x + 11y + 3.5z, where x is the sodium alginate content, y is the sodium sulfate content, and z is the sodium hexametaphosphate content. Since x + y + z = 1, x = (11 - A - 7.5z) / 9.

[0023] Considering that sodium hexametaphosphate in the sodium alginate complex is used to soften water, the method calculates the content of sodium hexametaphosphate based on this, and determines the maximum water hardness value of printing and dyeing water to be nmg / L through water hardness detection. After experimental research, the content of sodium hexametaphosphate required to fully soften the water with a hardness value of nmg / L is z=(3n÷10000)÷w÷100, where w is the beating concentration of the original paste to be tested obtained in step S1. When the target beating viscosity a is determined and the viscosity of the original paste to be tested is measured as bcp by the viscosity testing device, the beating concentration w can be calculated by the beating concentration formula, and then w is substituted into the above formula to calculate

[0024] The content z of sodium hexametaphosphate is obtained, and then when the conductivity of the original paste to be tested is measured, the content x of sodium alginate and the content y of glauber salt are calculated, and the content of each component in the sodium alginate complex can be quickly measured.

[0025] This method requires only simple tests of the viscosity and conductivity of the sodium alginate composite paste to be tested, as well as the hardness of the printing and dyeing water, to determine the content of each component in the composite. This method provides a simple and efficient testing method for optimizing product formulations. This method is unaffected by the molding state of the sodium alginate fiber during the acidification test, resolving the problem of the acidification method being unable to measure the sodium alginate content in composites with a sodium alginate content below 15%, significantly reducing the time required to determine the content of each component in the composite.

[0026] Specifically, the sodium alginate complex needs to be made into a high-concentration raw paste during the printing and dyeing application process. The raw paste pulping viscosity is usually greater than 10,000 cp (at room temperature). In order to make the test results more accurate, the target pulping viscosity a is set to 10,000 cp.

[0027] Preferably, the target viscosity of the beating is a=10000 cp.

[0028] Preferably, the beating concentration formula is w = (a÷0.9654÷b)∧(1÷3.2769)÷100.

[0029] Preferably, the water hardness value of the printing and dyeing water measured in step S3 in terms of CaCO3 is n=448 mg / L.

[0030] Preferably, step S1 is to test the conductivity of the original paste at 20°C.

[0031] Compared with existing technologies, the advantages and positive effects of the present invention are: it provides a method for rapidly testing the content of various components in a sodium alginate complex. Compared with the acidification method, this method can more accurately measure the content of various components in a sodium alginate complex for printing and dyeing with unknown ratios, and the testing speed is faster and the testing method is simpler. DETAILED DESCRIPTION

[0033] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that structures and features in one embodiment may be beneficially combined in other embodiments without further description.

[0034] A method for rapidly testing the content of each component in a sodium alginate complex, wherein the sodium alginate complex is composed of sodium alginate, sodium sulfate, and sodium hexametaphosphate. The method comprises the following steps:

[0035] S1: dissolving the sodium alginate complex in pure water to obtain a test paste, with a dissolution concentration of 1%. Testing the test paste to obtain a conductivity of Ams / cm and a viscosity of bcp;

[0036] S2: The target viscosity of beating at room temperature is set to a, and the beating concentration w is calculated according to the beating concentration formula;

[0037] S3: Determine the maximum water hardness value of the printing and dyeing water as nmg / L, and calculate the content of sodium hexametaphosphate in the sodium alginate complex according to the amount of sodium hexametaphosphate required to neutralize the calcium and magnesium ions in the water: z = (3n ÷ 10000) ÷ w ÷ 100;

[0038] S4: Calculate the sodium alginate content x according to the formula x=(11-A-7.5z)÷9; calculate the sodium sulfate content y according to y=1-xz.

[0039] Testing has shown that the conductivity of 1% sodium alginate in pure water at 20°C is 2 ms / cm, the conductivity of 1% sodium sulfate is 11 ms / cm, and the conductivity of 1% sodium hexametaphosphate is 3.5 ms / cm. Therefore, the conductivity of the original paste obtained in step S1 is A = 2x + 11y + 3.5z, where x is the sodium alginate content, y is the sodium sulfate content, and z is the sodium hexametaphosphate content. Since x + y + z = 1, x = (11 - A - 7.5z) / 9.

[0040] In view of the fact that sodium hexametaphosphate in the sodium alginate complex is used to soften water, this method calculates the content of sodium hexametaphosphate based on this, and determines the highest water hardness value of water used for printing and dyeing as nmg / L through water hardness detection. After experimental research, the content of sodium hexametaphosphate required to fully soften the water with a hardness value of nmg / L is z = (3n ÷ 10000) ÷ w ÷ 100, wherein w is the beating concentration of the original paste to be tested obtained in step S1. When the target beating viscosity a is determined and the viscosity of the original paste to be tested is measured as bcp by the viscosity testing device, the beating concentration w can be calculated by the beating concentration formula, and then w is substituted into the above formula to calculate the content z of sodium hexametaphosphate, and then when the conductivity of the original paste to be tested is measured, the content x of sodium alginate and the content y of alum can be calculated, and the content of each component in the sodium alginate complex can be quickly measured.

[0041] This method requires only simple tests of the viscosity and conductivity of the sodium alginate composite paste to be tested, as well as the hardness of the printing and dyeing water, to determine the content of each component in the composite. This method provides a simple and efficient testing method for optimizing product formulations. This method is unaffected by the molding state of the sodium alginate fiber during the acidification test, resolving the problem of the acidification method being unable to measure the sodium alginate content in composites with a sodium alginate content below 15%, significantly reducing the time required to determine the content of each component in the composite.

[0042] Specifically, the sodium alginate complex needs to be made into a high-concentration raw paste during the printing and dyeing application process. The raw paste pulping viscosity is usually greater than 10,000 cp (at room temperature). In order to make the test results more accurate, the target pulping viscosity a is set to 10,000 cp.

[0043] Specifically, in order to ensure the accuracy of the test, the beating concentration formula of step S2 is w=(a÷0.9654÷b)∧(1÷3.2769)÷100.

[0044] Specifically, we conducted a nationwide water quality survey and found that the water quality in the north is relatively hard. We selected water used in different printing and dyeing factories in the north and conducted water hardness tests. The worst water quality was 448 mg / L (measured in CaCO3). In order to ensure the softening effect, the hardness value n of the water used in printing and dyeing was set to 448 mg / L.

[0045] Specifically, in order to determine the test results more accurately, step S1 is to test the conductivity of the original paste at 20°C. Example 1

[0046] The sodium alginate complex to be tested in Example 1 was prepared, consisting of the following components by weight: 20% sodium alginate, 77.5% sodium sulfate, and 2.5% sodium hexametaphosphate. (The percentages in the examples of the present invention are all by mass.)

[0047] A method for rapidly testing the content of each component in a sodium alginate complex comprises the following steps:

[0048] S1: dissolving the obtained sodium alginate complex to be tested in pure water to obtain a raw paste to be tested, with a dissolution concentration of 1%. The conductivity of the raw paste to be tested is A = 8.9 ms / cm and the viscosity is b = 21 cp;

[0049] S2: The target viscosity of the beating at room temperature is preset to 10000 cp. The beating concentration is calculated according to the beating concentration formula: w = (a ÷ 0.9654 ÷ b) ∧ (1 ÷ 3.2769) ÷ 100 = (10000 ÷ 0.9654 ÷ 21) ∧ (1 ÷ 3.2769) ÷ 100 = 6.64%;

[0050] S3: According to test statistics, the highest water hardness value of printing and dyeing water is determined to be n = 448 mg / L. According to the amount of sodium hexametaphosphate required to neutralize the calcium and magnesium ion contents in the water, the content of sodium hexametaphosphate in the sodium alginate complex is calculated as z = (3n ÷ 10000) ÷ w ÷ 100 = (3 × 448 ÷ 10000) ÷ 6.64% ÷ 100 = 2.02%;

[0051] S4: According to the formula x = (11-A-7.5z) ÷ 9 = (11-8.9-7.5×2.02%) ÷ 9 = 21.65%, the sodium alginate content x = 21.65% is calculated; according to y = 1-xz = 1-21.65%-2.02% = 76.33%, the glauber salt content y = 76.33% is calculated.

[0052] The mass percentages of the components in the sodium alginate complex measured using the above method were: sodium alginate 21.65%, sodium sulfate 76.33%, and sodium hexametaphosphate 2.02%. The error was less than 1.65%, significantly less than the 5% error of the acidification method. This demonstrates that the method of this embodiment is more accurate than the acidification method. Example 2

[0053] The sodium alginate complex to be tested in Example 2 was prepared, consisting of the following components in percentage by weight: 55% sodium alginate, 41% glauber salt, and 3.5% sodium hexametaphosphate.

[0054] A method for rapidly testing the content of each component in a sodium alginate complex comprises the following steps:

[0055] S1: dissolving the obtained sodium alginate complex to be tested in pure water to obtain a raw paste to be tested, with a dissolution concentration of 1%. The conductivity of the raw paste to be tested was A = 5.61ms / cm and the viscosity was b = 122cp;

[0056] S2: The target viscosity of the beating at room temperature is preset to 10000 cp. The beating concentration is calculated according to the beating concentration formula: w = (a ÷ 0.9654 ÷ b) ∧ (1 ÷ 3.2769) ÷ 100 = (10000 ÷ 0.9654 ÷ 122) ∧ (1 ÷ 3.2769) ÷ 100 = 3.88%;

[0057] S3: According to test statistics, the highest water hardness value of printing and dyeing water is determined to be n = 448 mg / L. According to the amount of sodium hexametaphosphate required to neutralize the calcium and magnesium ion contents in the water, the content of sodium hexametaphosphate in the sodium alginate complex is calculated as z = (3n ÷ 10000) ÷ w ÷ 100 = (3 × 448 ÷ 10000) ÷ 3.88% ÷ 100 = 3.46%;

[0058] S4: According to the formula x = (11-A-7.5z) ÷ 9 = (11-5.61-7.5×3.46%) ÷ 9 = 57%, the sodium alginate content x = 57% is calculated; according to y = 1-xz = 39.54%, the glauber salt content y = 39.54% is calculated. Example 3

[0059] The sodium alginate complex to be tested in Example 3 was prepared, consisting of the following components in percentage by weight: 80% sodium alginate, 15% glauber salt, and 5% sodium hexametaphosphate.

[0060] A method for rapidly testing the content of each component in a sodium alginate complex comprises the following steps:

[0061] S1: dissolving the obtained sodium alginate complex to be tested in pure water to obtain a raw paste to be tested, with a dissolution concentration of 1%. The conductivity of the raw paste to be tested is A = 3.11ms / cm and the viscosity is b = 700cp;

[0062] S2: The target viscosity of the beating at room temperature is preset to 10000 cp. The beating concentration is calculated according to the beating concentration formula: w = (a ÷ 0.9654 ÷ b) ∧ (1 ÷ 3.2769) ÷ 100 = (10000 ÷ 0.9654 ÷ 700) ∧ (1 ÷ 3.2769) ÷ 100 = 2.28%;

[0063] S3: According to the test statistics, the highest water hardness value of printing and dyeing water is n=448mg / L.

[0064] The amount of sodium hexametaphosphate required for the calcium and magnesium ion content in the alginate complex is calculated as follows: z = (3n ÷ 10000) ÷ w ÷ 100 = (3 × 448 ÷ 10000) ÷ 2.28% ÷ 100 = 5.89%;

[0065] S4: According to the formula x = (11-A-7.5z) ÷ 9 = (11-3.11-7.5×5.89%) ÷ 9 = 82.76%, the sodium alginate content x = 82.76% is calculated; according to y = 1-xz = 11.35%, the glauber salt content y = 11.35% is calculated.

[0066] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for rapidly testing the content of each component in a sodium alginate complex, wherein the sodium alginate complex is composed of sodium alginate, sodium sulfate and sodium hexametaphosphate, characterized in that: The method comprises the following steps: S1: dissolving the sodium alginate complex in pure water to obtain a test paste, with a dissolution concentration of 1%. The test results show that the conductivity of the test paste is A ms / cm and the viscosity is b cp; S2: The target viscosity of the beating at room temperature is set to a, and the beating concentration w is calculated according to the beating concentration formula; the beating concentration formula is w = (a ÷ 0.9654 ÷ b) ∧ (1 ÷ 3.2769) ÷ 100; S3: Determine the maximum water hardness value of the printing and dyeing water (n mg / L), and calculate the content of sodium hexametaphosphate in the sodium alginate complex according to the amount of sodium hexametaphosphate required to neutralize the calcium and magnesium ions in the water: z = (3n ÷ 10000) ÷ w ÷ 100; S4: Calculate the sodium alginate content x according to the formula x=(11-A-7.5z)÷9; calculate the sodium sulfate content y according to y=1-xz.

2. The method for rapidly testing the content of each component in a sodium alginate complex according to claim 1, characterized in that: The target viscosity of the pulping is a=10000 cp.

3. The method for rapidly testing the content of each component in a sodium alginate complex according to claim 1, characterized in that: The water hardness value of the dyeing water measured in step S3 in terms of CaCO3 is n=448 mg / L.

4. The method for rapidly testing the content of each component in a sodium alginate complex according to claim 1, characterized in that: Step S1 is to test the conductivity of the original paste at 20°C.