No abstract

In this work, a high-strength, hierarchical, and mesoporous wood decorated with polyethylenimine (PEI) for CO2/N2 selective adsorption is studied. After lignin removal, the delignified wood showed micro- and mesoporous structures with a high specific surface area (44.3 m2/g; determined by physical adsorption). With increasing PEI loading content, the PEI-delignified wood composite with 49 wt % PEI (P49) showed superhigh CO2/N2 ideal selectivity (S = 114), a high CO2 adsorption capacity (2.96 mmol/g), and excellent CO2 cyclic performance at 120 °C. More importantly, the Young’s modulus of P49 reached 756 MPa, that is, over 10 times higher than those of cellulose porous materials reported in the literature. This PEI-delignified wood can play an important role in combustion as a potential CO2 adsorbent.

No abstract

The oil spill has caused significant attention on a global scale due to its damage to the environment and the economy. The development of economically and ecologically friendly oil sorbent materials has important meaning for the oil spill concern. In this work, we explored the non‐solvent impacted thermally induced phase separation (NITIPS) method to prepare the cellulose triacetate aerogel (CA) with low density (6.4–40.5 mg/cm3), high porosity (96.9–99.5%), large water contact angle (>129°) and high specific surface area (193–573 m2/g) as the oil sorbent material. The oil absorption capacity of CA with vegetable oil and vacuum pump oil reached 80.8 g/g and 38.9 g/g, respectively, consistent with Fick's law of diffusion. Moreover, the NITIPS method provided simpler process and controlled the shape of CA compared with the traditional thermally induced phase separation method. This study proved that the CA prepared by NITIPS methods played an important role as a potential oil absorption solids in the field of oil spill and organic chemical leakage.