首页|In situ formation of polymethylsiloxane nanofilaments on pristine cotton stalk with natural interconnected pores for rapid and recyclable organic solvents absorption
In situ formation of polymethylsiloxane nanofilaments on pristine cotton stalk with natural interconnected pores for rapid and recyclable organic solvents absorption
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NSTL
Elsevier
? 2022 Elsevier B.V.The creation of a superhydrophobic surface with simplified hydrophobic steps still faces great challenges. Herein, an in situ one-step hydrophobic strategy of growing polysiloxane nanofilaments onto pristine rod-shaped cotton stalk (CS) surface is used to prepare a new bulk superhydrophobic CS absorbent. The rich hydroxyl groups contained in CS directly polymerize with the silanols generated by the hydrolysis of methyltrichlorosilane on CS surface to form polysiloxane nanofilaments, leading to a change in the wettability of the CS surface. This strategy makes the water contact angle of the prepared absorbent as high as 161°, representing exceptional water repellency. Benefiting from the unique natural interconnected pore structures, the absorbent takes only 20 s to reach absorption equilibrium, showing rapid absorption performance toward organic solvents. The absorbent still maintains good absorption capacity even after 20 absorption-desorption cycles, holding excellent recyclability. The proposed hydrophobic modification approach simplifies the steps to the surface hydrophobization of CS, which provides a new strategy for the preparation of biomass-based superhydrophobic materials.
NSTL
Elsevier
