将原始棉材料浸泡在FeCl3溶液中，纤维表面由于物理吸附作用以及-OH

Soak the original cotton material in the FeCl3 solution, the fiber surface will adsorb a large amount of Fe3+ due to physical adsorption and the complexation of -OH and Fe3+, and then soak the CF-FeCl3 in the SA solution, the -OH on the cotton surface will interact with the carboxyl group of SA Combined, Fe3+ will complex with the carboxyl group, and the two together will adsorb SA on the cotton.

When the original cotton material is immersed in FeCl3 solution, a large amount of Fe3 + is adsorbed on the fiber surface due to physical adsorption and the complexation of - oh and Fe3 +, and then cf-fecl3 is immersed in SA solution, the - oh on the cotton surface will combine with the carboxyl group of SA, and Fe3 + will complexate with the carboxyl group, both of which will adsorb SA on cotton.<br>

The raw cotton material was soaked in FeCl3 solution, and a large amount of Fe3+ was adsorbed on the fiber surface due to physical adsorption and complexation of -OH and Fe3+. Then, CF-FeCl3 was soaked in SA solution, and -OH on the cotton surface would combine with carboxyl of SA, and Fe3+ would complex with carboxyl, which together adsorbed SA on cotton.