3-amino-5-hydroxypyrazole modified polyacrylonitrile chelate fiber and its preparation method and application
A technology of hydroxypyrazole and polyacrylonitrile, applied in the direction of fiber treatment, fiber type, chemical instruments and methods, etc., to achieve the effect of easy conditions, high desorption rate and high adsorption capacity
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Embodiment 1
[0033] A kind of 3-amino-5-hydroxypyrazole modified polyacrylonitrile chelate fiber preparation method comprises the following steps in the present embodiment:
[0034] After weighing 15.0 mg of acrylic fiber with an electronic balance, weigh 30 mL of deionized water with a graduated cylinder, and add them into a three-necked bottle together to fully swell the fiber for 12 hours. Then add the ligand 3-amino-5-hydroxypyrazole with a molar ratio of AHDP:PAN=3, under the condition of being filled with nitrogen, condensing and refluxing, keep a certain temperature at 60°C and shake at a constant speed of 150rpm / min for 6h until the reaction balance. Cool to room temperature and filter, rinse the filter residue with deionized water until the rinse wastewater is clear, and dry it in an oven at 50°C for later use.
[0035] Infrared spectrum test is carried out to the PAN fiber in the present embodiment, ligand 3-amino-5-hydroxypyrazole and the final product that prepares: by figure...
Embodiment 2
[0037] After weighing 15.0 mg of acrylic fiber with an electronic balance, weigh 30 mL of deionized water with a graduated cylinder, and add them into a three-neck bottle together to fully swell the fiber for 15 hours. Then add the ligand 3-amino-5-hydroxypyrazole with a molar ratio of AHDP:PAN=4, under the condition of being filled with nitrogen, condensing and refluxing, keep a certain temperature at 90°C and shake at a constant speed of 150rpm / min for 10h until the reaction balance. Cool to room temperature and filter, rinse the filter residue with deionized water until the rinse wastewater is clear, and dry it in an oven at 50°C for later use.
[0038] The PAN fiber in the present embodiment, the ligand 3-amino-5-hydroxypyrazole and the prepared final product were tested by infrared spectroscopy, and the test results were the same as those in Example 1. figure 1The results are similar, and it can be known that the final product is a 3-amino-5-hydroxypyrazole modified poly...
Embodiment 3
[0040] After weighing 15.0mg of acrylic fiber with an electronic balance, weigh 30mL of deionized water with a graduated cylinder, and add them into a three-necked bottle together to fully swell the fiber for 20 hours. Then add the ligand 3-amino-5-hydroxypyrazole with a molar ratio of AHDP:PAN=5, under the condition of being filled with nitrogen, condensing and refluxing, keep a certain temperature at 75°C and shake at a constant speed of 150rpm / min for 12h until the reaction balance. Cool to room temperature and filter, rinse the filter residue with deionized water until the rinse wastewater is clear, and dry it in an oven at 50°C for later use.
[0041] The PAN fiber in the present embodiment, the ligand 3-amino-5-hydroxypyrazole and the prepared final product were tested by infrared spectroscopy, and the test results were the same as those in Example 1. figure 1 The results are similar, and it can be known that the final product is a 3-amino-5-hydroxypyrazole modified pol...
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Abstract
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