Poly(vinylidene Fluoride) Sandwiched <i>Calotropis Gigantea</i> Fiber: A Reusable Oil Sorbent with High-efficiency

A reusable oil sorbent was prepared via a facile phase inversion method by using poly(vinylidene fluoride) (PVDF) to assist the shape formation of Calotropis gigantea fiber (CGF). The resulting PVDF-s-CGF with PVDF:CGF of 3:2 (weight ratio) shows not only high structural stability but also good oil-absorbing capacity (18.81 g/g for carbon tetrachloride). With the water contact angles >129°, PVDF-s-CGF also shows excellent absorption selectivity for the oils. Finally, PVDF-s-CGF presents good reusability, and the absorption percentage is 84.11% for kerosene after 10 cycles. Therefore, PVDF-s-CGF will exhibit a great potential for large-scale application in oil absorption.本研究采用简便相转化法制备了可重复使用的吸油材料：以聚偏氟乙烯（poly(vinylidene fluoride), PVDF）辅助成型牛角瓜纤维（Calotropis gigantea fiber, CGF）。所制备的PVDF-s-CGF（PVDF与CGF质量比为3:2）不仅具备优异的结构稳定性，同时拥有出色的吸油性能：对四氯化碳的吸油量可达18.81 g/g。该材料的水接触角大于129°，对各类油品均表现出优异的吸附选择性。此外，PVDF-s-CGF具备良好的重复使用性能：经过10次循环后，其对煤油的吸附保留率仍可达84.11%。综上，PVDF-s-CGF在油品吸附领域具备大规模应用的巨大潜力。