A silver-containing radiation-proof cotton fabric and its preparation method

Abstract

This invention relates to a silver-containing anti-radiation cotton fabric and its preparation method. The cotton fabric of this invention can be obtained by the following method: First, dissolving the cotton fabric in a dopamine hydrochloride solution; second, dissolving the cotton fabric in an AgNO3 solution; finally, removing the cotton fabric, washing it, and drying it to obtain the anti-radiation cotton fabric. The anti-radiation cotton fabric obtained by this invention has strong electromagnetic radiation protection capabilities. Specifically, at frequencies of 300, 1000, and 2450 MHz, the shielding effectiveness reaches 39.470, 47.890, and 47.157 dB, respectively. After five washes, its anti-radiation function remains stable without significant weakening.

Description

Technical Field

[0001] This invention belongs to the field of fabric preparation technology, and relates to anti-radiation cotton fabric and its preparation method, specifically to a silver-containing anti-radiation cotton fabric and its preparation method. Background Technology

[0002] Since the establishment of international radiation protection standards in the 1960s, radiation protection materials and clothing have attracted widespread attention. In the late 1980s and early 1990s, many countries and regions began to focus on this issue. It was from that time that electromagnetic radiation shielding clothing gradually entered ordinary households.

[0003] One method for creating anti-radiation fabrics is to cleverly select metal fibers, as metal fibers have anti-radiation properties; another method is to add anti-radiation materials to the fabric during the finishing process to achieve the same effect. However, both methods have drawbacks, and new solutions are needed.

[0004] Cotton fabrics are widely used, but their radiation protection performance is poor. Chemical deposition can deposit metal particles onto a solid surface, giving the solid a special function; however, this method has rarely been reported in the field of radiation protection for fabrics because the metal particles deposited on the fabric surface have poor adhesion and are easily detached, resulting in poor durability of the fabric's radiation protection function. Summary of the Invention

[0005] In order to overcome the shortcomings of existing technologies, such as poor adhesion and easy detachment of metal particles deposited on the fabric surface, this invention provides a silver-containing radiation-proof cotton fabric and its preparation method.

[0006] The first objective of this invention is to provide a silver-containing anti-radiation cotton fabric, which is achieved by the following steps: First, dissolving the cotton fabric in a dopamine hydrochloride solution; second, dissolving the cotton fabric in an AgNO3 solution; and finally, removing the cotton fabric, washing it, and drying it to obtain the anti-radiation cotton fabric.

[0007] The second objective of this invention is to provide a method for preparing a silver-containing radiation-proof cotton fabric, the method comprising the following steps:

[0008] (1) Dissolve dopamine hydrochloride in Tris-HCl buffer solution at pH 8.5 to prepare a dopamine hydrochloride solution with a concentration of 2-3 g / L; dissolve silver nitrate in Tris-HCl buffer solution at pH 8.5 to prepare a silver nitrate solution with a concentration of 20-30 mmol / L αgNO3.

[0009] (2) Dissolve the cotton fabric in a hydrochloric acid dopamine solution and shake it at room temperature in the dark for 10-12 hours. Then take out the cotton fabric, wash it with water and dry it.

[0010] Preferably, the ratio of the cotton fabric to the dopamine hydrochloride solution is 1g:(10-12)mL.

[0011] (3) Dissolve the cotton fabric in AgNO3 solution, shake for 10-12 hours in the dark, then take out the cotton fabric, wash it with water and dry it to obtain the anti-radiation cotton fabric.

[0012] Preferably, the ratio of the cotton fabric to the AgNO3 solution is 1g:(10-12)mL.

[0013] Mechanism analysis of the present invention: The present invention uses a chemical method to deposit silver particles onto cotton fabric, thereby giving the cotton fabric a better anti-radiation function.

[0014] The present invention has the following significant advantages:

[0015] (1) Metal particles deposited on the surface of fabric have poor fastness and are easy to fall off; the inventors of this application unexpectedly discovered that by using chemical methods to deposit Ag particles on cotton fabric, the resulting cotton fabric has better anti-radiation function; after multiple washes, the anti-radiation function of the cotton fabric is still not weakened.

[0016] (2) The anti-radiation cotton fabric prepared by the present invention has strong anti-electromagnetic radiation function. When the frequency points are 300, 1000 and 2450 MHz, the shielding effectiveness reaches 39.470, 47.890 and 47.157 dB respectively. The appropriate concentration of hydrochloric acid dopamine solution and AgNO3 solution are both beneficial to improving the anti-electromagnetic radiation performance of the fabric. Detailed Implementation

[0017] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0018] Example 1

[0019] A silver-containing radiation-protective cotton fabric, prepared by the following method:

[0020] (1) Dissolve dopamine hydrochloride in Tris-HCl buffer at pH 8.5 to prepare a 2.5 g / L dopamine hydrochloride solution; dissolve silver nitrate in Tris-HCl buffer at pH 8.5 to prepare a 25 mmol / L AgNO3 solution.

[0021] (2) Dissolve 1000g of cotton fabric in 11000mL of dopamine hydrochloride solution and shake at room temperature in the dark for 11 hours. Then take out the cotton fabric, wash it with water and dry it.

[0022] (3) Dissolve 1000g of cotton fabric in 11000ml of AgNO3 solution, shake for 11 hours in the dark, then take out the cotton fabric, wash it with water and dry it to obtain radiation-proof cotton fabric.

[0023] Example 2

[0024] A silver-containing radiation-protective cotton fabric, prepared by the following method:

[0025] (1) Dissolve dopamine hydrochloride in Tris-HCl buffer solution with pH=8.5 to prepare a dopamine hydrochloride solution with a concentration of 2 g / L; dissolve silver nitrate in Tris-HCl buffer solution with pH=8.5 to prepare a silver nitrate solution with a concentration of 20 mmol / L AGNO3.

[0026] (2) Dissolve 1000g of cotton fabric in 10000mL of dopamine hydrochloride solution and shake at room temperature in the dark for 10h. Then take out the cotton fabric, wash it with water and dry it.

[0027] (3) Dissolve 1000g of cotton fabric in 10000ml of AgNO3 solution, shake for 10h in the dark, then take out the cotton fabric, wash it with water and dry it to obtain radiation-proof cotton fabric.

[0028] Example 3

[0029] A silver-containing radiation-protective cotton fabric, prepared by the following method:

[0030] (1) Dissolve dopamine hydrochloride in Tris-HCl buffer at pH 8.5 to prepare a 3 g / L dopamine hydrochloride solution; dissolve silver nitrate in Tris-HCl buffer at pH 8.5 to prepare a 30 mmol / L AgNO3 solution.

[0031] (2) Dissolve 1000g of cotton fabric in 12000mL of dopamine hydrochloride solution and shake at room temperature in the dark for 12 hours. Then take out the cotton fabric, wash it with water and dry it.

[0032] (3) Dissolve 1000g of cotton fabric in 12000ml of AgNO3 solution, shake for 12 hours in the dark, then take out the cotton fabric, wash it with water and dry it to obtain radiation-proof cotton fabric.

[0033] Comparative Example A

[0034] Compared with Example 1, in this Comparative Example A, the concentration of dopamine hydrochloride solution was reduced, that is, the "preparation of dopamine hydrochloride solution with a concentration of 2.5 g / L" in step (1) was adjusted to "preparation of dopamine hydrochloride solution with a concentration of 0.025 g / L". Other preparation methods were carried out according to the preparation method of Example 1, and fabric d was obtained.

[0035] Comparative Example B

[0036] Compared with Example 1, in this Comparative Example B, the concentration of AgNO3 solution was reduced, that is, the "preparation of 25 mmol / L AgNO3 solution" in step (1) was changed to "preparation of 0.25 mmol / L AgNO3 solution". Other preparation methods were carried out according to the preparation method of Example 1, and fabric e was obtained.

[0037] Performance testing:

[0038] Fabrics a, b, c, d, and e prepared according to the specific embodiments 1-3 and comparative examples A-B of this invention, and an untreated cotton fabric f were selected. The treated fabrics a-e were washed five times, and then their radiation shielding performance was tested against the untreated cotton fabric f. The electromagnetic shielding effectiveness of the fabrics was tested according to GB / T 30142—2013 "Method for Measuring the Shielding Effectiveness of Planar Electromagnetic Shielding Materials," and the test results are shown in the table below.

[0039]

[0040] According to GB / T 30142—2013 "Method for Measuring the Shielding Effectiveness of Planar Electromagnetic Shielding Materials", at the same frequency (MHz), the higher the shielding effectiveness (dB), the better the electromagnetic radiation protection performance of the fabric. As shown in the table, the anti-radiation cotton fabrics a, b, and c prepared in Examples 1-3 have significantly stronger anti-radiation performance than the anti-radiation cotton fabrics d and e prepared in Comparative Examples A-B. The unfinished cotton fabric f has the worst anti-radiation performance. Specifically, for fabric a in Example 1, the shielding effectiveness reaches 39.470, 47.890, and 47.157 dB at frequencies of 300, 1000, and 2450 MHz, respectively. Furthermore, the concentrations of dopamine hydrochloride solution and AgNO3 solution have a significant impact on the electromagnetic radiation protection performance of the anti-radiation cotton fabric; appropriate concentrations of dopamine hydrochloride solution and AgNO3 solution are beneficial to improving the electromagnetic radiation protection performance of the fabric.

Claims

1. A method for preparing a silver-containing radiation-proof cotton fabric, characterized in that, The preparation method includes the following steps: (1) Dissolve dopamine hydrochloride in Tris-HCl buffer at pH 8.5 to prepare a dopamine hydrochloride solution with a concentration of 2-3 g / L; dissolve silver nitrate in Tris-HCl buffer at pH 8.5 to prepare a silver nitrate solution with a concentration of 20-30 mmol / L αgNO3. (2) Dissolve the cotton fabric in a hydrochloric acid dopamine solution and shake it at room temperature in the dark for 10-12 hours. Then take out the cotton fabric, wash it with water and dry it. (3) Dissolve the cotton fabric in AgNO3 solution, shake for 10-12 hours in the dark, then take out the cotton fabric, wash it with water and dry it to obtain the anti-radiation cotton fabric. The ratio of cotton fabric to dopamine hydrochloride solution in step (2) is 1g:(10-12)mL; The ratio of cotton fabric to AgNO3 solution in step (3) is 1g:(10-12)mL.

2. A silver-containing anti-radiation cotton fabric, characterized in that, It is prepared by the method described in claim 1.

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