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

ABSTRACT

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.

摘要

本文通过简单的相转换法,利用聚偏氟乙烯(PVDF)辅助牛角瓜纤维(CGF)成型,制备了一种可以重复使用的吸油材料 PVDF-s-CGF.当PVDF-s-CGF中PVDF与CGF的质量比为3:2时,吸油材料不仅具有很高的结构稳定性,而且具有良好的吸油性能(对于四氯化碳可高达18.81 g/g. PVDF-s-CGF的水接触角大于129°, 对于多种油类都展现出色的油水选择吸收性.此外, PVDF-s-CGF还具有良好的重复使用性能,煤油经10次循环后的吸收率为84.11%. 因此, PVDF-s-CGF将在吸油领域显示出广阔的应用前景.

KEYWORDS:

• Calotropis gigantea fiber
• poly(vinylidene fluoride)
• high-efficiency
• oil sorbent
• reusable

关键词:

• 牛角瓜纤维
• 聚偏氟乙烯
• 高效率
• 吸油材料
• 可重复使用

Acknowledgments

The authors were grateful for the support from Huimin Huang (Shanghai Magic Tree Biotechnology Co., Ltd., Shanghai, China) for providing the Calotropis gigantea fiber.

Supplementary material

Supplemental data for this article can be accessed on the publisher’s website.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (No. 21477135), the Fundamental Research Funds for the Central Universities (No. lzujbky-2019-95) and the Innovation and Entrepreneurship Project of Lanzhou University (No. cxcy201909).