| abstract |
Abstract The present invention discloses a novel biomass-based adsorptive material of low- temperature desorption and a preparation method and use thereof. The material is obtained by chemically grafting a stepwise dual-temperature stimuli-responsive polyethyleneimine onto a carboxylated cellulose nanofiber matrix to prepare a stepwise dual-temperature stimuli-responsive intelligent nanofiber, and combining the stepwise dual-temperature stimuli-responsive intelligent nanofiber with a photosensitizer having near-infrared stimuli-response to prepare a stepwise dual-temperature/near- infrared stimuli-responsive intelligent nanofiber, and then by using a crosslinking agent to directly crosslink and combine the stepwise dual-temperature/near-infrared stimuli- responsive intelligent nanofiber with a hyperbranched polyamine in one step. The material has a stepwise dual-temperature/near-infrared stimuli-response, high density of amino group (greater than 14 mmol/g), and nano cavities. Date Recue/Date Received 2020-06-09 |