Blow Spinning of Polyimide/SiO₂ Composite Fibrous Sponges with Excellent Adsorption Capacity and Recyclability

Abstract

Developing adsorption materials for organic solvents with both high adsorption capacity and recyclability provides a broad prospect for contaminated water treatment. In this study, PI/SiO2 composite nanofibrous sponges with hydrophobicity, high oil adsorption capacity, and excellent cycling performance fabricated by blow spinning have been reported. The improvement of hydrophobicity of PISi-3 was credited to the SiO2 nanoparticles, resulting in excellent oil adsorption capacity (103.95 g/g for ethanol, 320.99 g/g for motor oil, and 386.81 g/g for silicone oil). The recyclability after 10 cycles of PISi-3 was improved by 23% compared with the pure PI sponge owing to the supporting effect of SiO2 nanoparticles. Sponges with higher cycling performance could be obtained by regulating the temperatures of thermal treatment. PISi-3 after heat treatment at 450 °C exhibited good oil adsorption ability (98.12 g/g for ethanol, 261.92 g/g for motor oil, and 315.81 g/g for silicone oil) and excellent cycling performance. The adsorption capacity decreased by only 0.22% after 10 cycles. Therefore, the fabrication strategy of the sponges has great prospects in maritime oil spill recycling and industrial water treatment.

Self‐Signal‐Triggered Drug Delivery System for Tumor Therapy Using Cancer Cell Membrane‐Coated Biocompatible Mn3O4 Nanocomposites

“…Tf was chosen as the targeting agent owing to its specific affinity for Tf receptors, which are abundantly present on various cancer cell types. [ 56 ]…”

Research Progress and Application of Polyimide-Based Nanocomposites

“…The size effect and surface effect brought about by fiber diameter refinement endow many unique properties [ 91 , 92 ]. The preparation methods of PI nanofibers include electrostatic spinning [ 93 ], centrifugal jet spinning [ 94 , 95 ], sonochemistry [ 96 ], solution blow spinning, and melt spinning [ 97 , 98 ]. Among them, electrostatic spinning is the most commonly used method because of its simple manufacturing equipment and high process controllability [ 99 ].…”