Chemical modification method and chemical modification device for aramid fibers
A technology for chemical modification of aramid fibers, applied in fiber processing, fiber types, textiles and papermaking, etc., can solve the problems of limited modification effect, low production efficiency and difficulty of aramid fibers, and achieve easy control of the reaction process, Improve efficiency and avoid waste
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Embodiment 1
[0047] A chemical modification method for aramid fibers, comprising the following process steps:
[0048] A. Preparation of surface modification treatment agent
[0049] Under the protection of an inert gas, the acid chloride active reaction reagent or the acid anhydride active reaction reagent is dissolved in an anhydrous strong polar organic solvent to prepare an active solvent system, that is, a surface modification treatment agent; the acid chloride active reaction reagent It is any one of acetyl chloride, propionyl chloride, chloroacetyl chloride, dichloroacetyl chloride, trichloroacetyl chloride, thionyl chloride, chloropropionyl chloride or several mixtures in any proportion; the acid anhydride reactive reagent is acetyl chloride Acid anhydride, propionic anhydride, fluoroacetic anhydride, chloroacetic anhydride, bromoacetic anhydride, iodoacetic anhydride, or a mixture of any of them in any proportion; the strong polar organic solvent is N-methylpyrrolidone , any one ...
Embodiment 2
[0056] On the basis of embodiment 1:
[0057] Preferably, in step A, the volume percent concentration of the acid chloride reactive reagent or acid anhydride reactive reagent dissolved in anhydrous strong polar organic solvent is 10%.
[0058] Preferably, in step B, the reaction temperature is 30° C., and the reaction time is 10 minutes.
[0059] Preferably, in step C, the washing is performed with deionized water at 50°C, and the drying temperature is 120°C.
Embodiment 3
[0061] On the basis of embodiment 1:
[0062] Preferably, in step A, the volume percent concentration of the acid chloride reactive reagent or acid anhydride reactive reagent dissolved in an anhydrous strong polar organic solvent is 50%.
[0063] Preferably, in step B, the reaction temperature is 50° C., and the reaction time is 20 minutes.
[0064] Preferably, in step C, the washing is performed with 80°C deionized water, and the drying temperature is 140°C.
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