Method for preparing strong acidic ion-exchange fibers
The invention provides a method for preparing strong acidic ion-exchange fibers. The method comprises the steps of performing vacuum packaging for polyolefine fibers; pre-irradiating through a radiation source; feeding pre-irradiated polyolefine fibers into a grafting solution under the protection o...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | The invention provides a method for preparing strong acidic ion-exchange fibers. The method comprises the steps of performing vacuum packaging for polyolefine fibers; pre-irradiating through a radiation source; feeding pre-irradiated polyolefine fibers into a grafting solution under the protection of inert gas to react to obtain a polyolefine fiber grafting copolymer; then sulphonating through chlorosulfonic acid to obtain strong acidic ion-exchange fibers; a cross-linking agent is fed into the grafting solution to enable high mechanical strength and relatively high exchange capacity of the sulphonated fibers. According to the method, the process is simple, the polyolefine fiber grafting copolymer is easily prepared under a low temperature condition; the prepared polyolefine fiber-styrene copolymer is low in styrene autopolymer (less than 2%); the dichloroethane solution of chlorosulfonic acid is treated as a sulphonating agent, so that little chlorosulfonic acid is used, and the post-processing is simple. |
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