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Method for preparing weak-base ion exchange fibers

A weakly basic anion and fiber exchange technology, applied in ion exchange, anion exchange, fiber treatment, etc., can solve the problems of cumbersome and complex reaction process, harsh reaction conditions, expensive raw materials, etc., and achieve large adsorption capacity, fast adsorption and Desorption speed, effect of expanding application field and range

Inactive Publication Date: 2013-05-01
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods all have certain defects, such as the potential danger caused by the indirect generation of toxic or carcinogenic substances, harsh reaction conditions, cumbersome and complicated reaction processes, and expensive raw materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 2g of loose fiber of absorbent cotton, dried in a vacuum oven to constant weight, immersed in 20ml of (S)-1-amino-3-chloro-2-propanol hydrochloride / sodium carbonate solution, wherein (S)-1-amino - The concentration of 3-chloro-2-propanol hydrochloride is 100g / L, the concentration of sodium carbonate is 50g / L, stir and react at 70°C for 60 minutes, then rinse with soft water for 2 minutes, and wash with 1% dilute hydrochloric acid until medium After drying, the grafting rate of the obtained weakly basic ion exchange fiber is 70.4%, and the exchange capacity is 2.1-3.9mmol / g.

Embodiment 2

[0031] 2g of pre-treated pure cotton plain woven fabric is dried to constant weight in a vacuum oven, immersed in 20ml (S)-1-amino-3-chloro-2-propanol hydrochloride / sodium hydroxide solution, wherein The concentration of (S)-1-amino-3-chloro-2-propanol hydrochloride is 90g / L, the concentration of sodium hydroxide is 30g / L, and the reaction is stirred at room temperature for 10 minutes, and then passed through rolling with 100% rolling rate Car, dry in an oven at 70°C for 6 minutes, then bake at 120°C for 3 minutes, then rinse with soft water for 2 minutes, and wash with 1% dilute acetic acid until neutral. The grafting ratio of the obtained weakly basic ion exchange fiber is 72.7%, and the exchange capacity is 2.4-4.1mmol / g.

Embodiment 3

[0033]1.67dtex×38mm viscose short filament 2g, dried in a vacuum oven to constant weight, immersed in 20ml (S)-1-amino-3-chloro-2-propanol hydrochloride / sodium carbonate solution, where (S )-1-amino-3-chloro-2-propanol hydrochloride concentration is 50g / L, sodium carbonate concentration is 40g / L, stirred and reacted at 60°C for 160 minutes, then rinsed with soft water for 1.5 minutes, 1% Wash with dilute hydrochloric acid until neutral. The grafting rate of the obtained weakly basic ion exchange fiber is 61.3%, and the exchange capacity is 1.8-3.1 mmol / g.

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PUM

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Abstract

The invention relates to a method for preparing weak-base anion exchange fibers. The method comprises the following steps: immersing cellulosic fibers into modified finishing liquor, reacting for 5-300 minutes at 30-90 DEG C, and then acid-washing with soft water to be neutral to obtain the weak-base anion exchange fibers; or, immersing the cellulosic fibers into the modified finishing liquor for 0.1-60 minutes, then rolling, drying, baking and acid-washing the cellulosic fibers with soft water to be neutral to obtain the weak-base anion exchange fibers, wherein the rolling-remain rate is 50-200 percent. The method has the advantages of short production flow, simple process, easiness in operation, moderate reaction condition and strong practicability and does not need special equipment, and the industrialization promotion is easily implemented.

Description

technical field [0001] The invention belongs to the field of preparation of fiber materials, in particular to a preparation method of weakly basic ion exchange fibers. Background technique [0002] With social development and technological progress, people have more and more stringent requirements for the selection of separation materials: first, large adsorption capacity and fast adsorption speed; second, strong selective adsorption capacity, which can selectively remove the required substances or harmful substances in the solution. Third, it is stable and durable in the adsorbed liquid and desorbed liquid; fourth, it is cheap and can be supplied in large quantities, easy to desorb, and can be recycled repeatedly; fifth, it can be used in various forms for ease of use. The separation technology is simple and the energy consumption is low; Sixth, there are many varieties, and different varieties can be used according to different requirements. [0003] Ion Exchange Fiber (I...

Claims

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Application Information

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IPC IPC(8): D06M13/368D06M11/38D06M11/76D06M11/60B01J41/16D06M101/06
Inventor 何瑾馨李春辉董霞刘保江
Owner DONGHUA UNIV