Carboxyl-Modified Nanocellulose Cryogels with a Wide Range and Fast pH-Responsive Switchable Wettability for Oil/Water Separation 


Vol. 25,  No. 9, pp. 3229-3243, Sep.  2024
10.1007/s12221-024-00654-w


PDF
  Abstract

In recent years, wettability materials with pH-responsive have attracted increasing attention in oil/water separation applications. However, these materials were limited by the pH range and infiltration time. Herein, a simple operational procedure is proposed to prepare banana nanocellulose cryogels with pH-responsive switchable wettability to realize these outstanding performances. Alkyl-modified cryogels (BCNC-MS) are obtained by adding methyltrimethoxysilane (MTMS) to the banana nanocellulose (BCNF) suspension. BCNC-MS are soaked in the carboxyl-modified solution to produce pH-responsive cryogels (BCNC-MS-SA). The carboxyl-modified solution is made from succinic anhydride (SA), (3-aminopropyl)triethoxysilane (KH550), and N,N-dimethylformamide (DMF) in a molar mass ratio of 1:1:18. The key to achieving the pH-response is the protonation and deprotonation of the carboxyl groups. SEM demonstrates that the modification keeps the three-dimensional porous structure of the cryogel, and the results of EDS, FTIR, and XPS show the success of alkyl and carboxyl modifications. BCNC-MS-SA can realize hydrophilic/underwater oleophobic (θwater?=?0°) and hydrophobic/underwater oleophilic (maximal θwater?=?135°) wettability transitions after treatment with different pH solutions. Compared with other pH-responsive oil/water separation materials, BCNC-MS-SA performs well in pH?=?1 and pH?=?13 environments, and the shortest infiltration time is only 3 s. With a porosity of 93.80%, BCNC-MS-SA possesses excellent adsorption capacity (10?40 g/g), oil/water separation efficiency (>?92%), and adsorption cycle performance (15 cycles) even for viscous oils. Moreover, BCNC-MS-SA has satisfactory stability. Cryogels are made of banana nanocellulose, and they are inexpensive and can be easily degraded. BCNC-MS-SA has great potential in practical applications such as oil removal and purification of oily wastewater.

  Statistics
Cumulative Counts from November, 2022
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.


  Cite this article

[IEEE Style]

M. Zhang, P. Wu, N. Guo, W. Hu, M. Li, J. Shao, H. Su, C. B. Twebaze, J. Ye, G. Zheng, Z. Wang, Y. Yang, H. Li, X. Zhuang, "Carboxyl-Modified Nanocellulose Cryogels with a Wide Range and Fast pH-Responsive Switchable Wettability for Oil/Water Separation," Fibers and Polymers, vol. 25, no. 9, pp. 3229-3243, 2024. DOI: 10.1007/s12221-024-00654-w.

[ACM Style]

Meiling Zhang, Peiming Wu, Ningting Guo, Wenhui Hu, Min Li, Jianhao Shao, Huiying Su, Collins Bagiritima Twebaze, Jianqing Ye, Guangwei Zheng, Zhangang Wang, Yaolin Yang, Hongyan Li, and Xupin Zhuang. 2024. Carboxyl-Modified Nanocellulose Cryogels with a Wide Range and Fast pH-Responsive Switchable Wettability for Oil/Water Separation. Fibers and Polymers, 25, 9, (2024), 3229-3243. DOI: 10.1007/s12221-024-00654-w.

Search
(IN TITLE, AUTHOR, ABSTRACT,KEYWORDS)

Advanced Search ▼

POPULAR KEYWORDS
(TOP 10 KEYWORDS)

Recent Publications
(LAST 3 YEARS)

pISSN : 1229 - 9197
eISSN : 1875 - 0052

Impact Factor(2022): 2.5