Amidoximated polyacrylonitrile spinning solution and nanoscale ion exchange fiber prepared from solution
A technology of polyacrylonitrile spinning and ion exchange fiber, applied in cation exchange materials, ion exchange water/sewage treatment, rayon manufacturing, etc., can solve the problems of easy breakage, complicated process, difficult spinning, etc., and achieve excellent adsorption performance effect
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[0031] Example 1
[0032] (1) Preparation of amidoximated polyacrylonitrile solution: Add 2.9g hydroxylamine hydrochloride and 6.9g potassium carbonate to the DMF solution of 40g polyacrylonitrile (Jilin Petrochemical Company) with a mass percentage concentration of 10.0%, and heat and stir at 80°C. React for 3.5h, stop heating and cool to room temperature, filter to obtain amidoximated polyacrylonitrile solution.
[0033] (2) Viscosity change: use a rotary viscometer to measure the viscosity of the amidoximated polyacrylonitrile solution obtained in step (1). During the measurement, it is found that with the rotation of the viscometer rotor, the pointer of the dial reading starts to shake greatly, and the viscosity increases in a short time. Move in the general direction, beyond the viscosity measurement range. After a few minutes of rotation, the amidoximated polyacrylonitrile solution has been cross-linked, and the formed cross-linked substance adheres to the surface of the vis...
Example Embodiment
[0035] Example 2-4
[0036] Add 2.9g hydroxylamine hydrochloride and 6.9g potassium carbonate to the DMF solution of 40g polyacrylonitrile with a concentration of 10.0% by mass, heat and stir at 80℃, react for 3.5h, stop heating and cool to room temperature, filter to obtain amidoximated polypropylene Nitrile solution.
[0037] Add formic acid as a cross-linking inhibitor to the prepared amidoximated polyacrylonitrile solution, stir at room temperature for 3.5h to obtain the amidoximated polyacrylonitrile spinning solution, and place it at room temperature for 0h, 12h, 24h, 36h, 72h and then determine the solution Viscosity.
[0038] Using the above-mentioned amidoximated polyacrylonitrile spinning solution as raw material, using electrospinning technology (Zhao Yiyang, high-voltage electrospinning technology to construct one-dimensional micro-nano structure materials [PhD thesis], 2007), at room temperature 25℃, air relative humidity Under the condition of 20%, the spinning voltag...
Example Embodiment
[0039] Example 5-7
[0040] Add 2.9g hydroxylamine hydrochloride and 6.9g potassium carbonate to the DMF solution of 40g polyacrylonitrile with a concentration of 10.0% by mass, heat and stir at 80℃, react for 3.5h, stop heating and cool to room temperature, filter to obtain amidoximated polypropylene Nitrile solution.
[0041] Add quantitative acetic acid as a crosslinking inhibitor to the prepared amidoximated polyacrylonitrile solution, stir at room temperature for 3-4 hours to obtain the amidoximated polyacrylonitrile spinning solution, and place it at room temperature for 0h, 12h, 24h, 36h, 72h. Determine the solution viscosity.
[0042] The amidoximated polyacrylonitrile nanofibers were prepared according to the method in Example 2, and the adsorption amount of copper ions and lead ions was measured.
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