| abstract |
The invention belongs to the field of high-performance paper-based fiber material manufacturing, and in particular relates to a preparation method of PBO precipitating fiber for preparing pulp. The main steps are as follows: (1) synthesizing polyhydroxyamide ( PHA) precursor polymer; (2) After filtering and defoaming the above PHA solution, inject it into a high-speed stirring precipitation bath to obtain a PHA microfiber suspension; (3) Suction filtration, washing, Absolutely drying to obtain PHA fibrous pulp; (4) subjecting the PHA fibrous pulp to high temperature heat treatment to obtain PBO fibrous pulp; the above-mentioned method is for beating the precursor PHA, which contains a large number of polar groups , the dispersion effect in the precipitating liquid is better, and the surface of the final prepared PBO precipitating fiber pulp is hairy, and the microfibers are clustered, with a larger specific surface area and better performance. |