journal article·2023

Preparation of expandable vertically aligned carbon nanotube arrays/polydimethylsiloxane membrane by a modular splicing method and its application in in situ ethanol recovery from ethanol fermentation

Decai Yang, Wei Kang, Xueyang Fang, Fei Gao, Chi Cheng, Zongbin Zhao, Shi Chen, Yongming Bao, Chuang Xue

Nanoscale· Volume 15· Issue 24
Publisher page

Abstract

Aligned carbon nanotube (CNT) arrays have been widely used in the preparation of polymer composites. CNT arrays are commonly prepared by chemical vapor deposition (CVD) in a high temperature tubular furnace, and the areas of the aligned CNT/polymer membranes prepared are relatively small (<30 cm2) due to the limitation of the inner diameter of the furnace, which limits its practical application in the field of membrane separation. Herein, the vertically aligned CNT arrays/polydimethylsiloxane (PDMS) membrane with large and expandable area was prepared by a modular splicing method for the first time, with a maximum area of 144 cm2. The addition of CNT arrays with openings at both ends significantly improved the pervaporation performance of the PDMS membrane for ethanol recovery. At 80 °C, the flux (671.6 g m-2 h-1) and separation factor (9.0) of CNT arrays/PDMS membrane were increased by 435.12% and 58.52%, respectively, compared with those of the PDMS membrane. Furthermore, the expandable area enabled the CNT arrays/PDMS membrane to couple with fed-batch fermentation for pervaporation for the first time, which increased the ethanol yield (0.47 g g-1) and productivity (2.34 g L-1 h-1) by 9.3% and 4.9% respectively compared with batch fermentation. Besides, the flux (135.47-166.79 g m-2 h-1) and separation factor (8.83-9.21) of CNT arrays/PDMS membrane remained stable in this process, indicating that this membrane has the potential to be applied in industrial bioethanol production. This work provides a new idea for the preparation of large-area aligned CNT/polymer membranes, and also opens up a new direction for the application of large-area aligned CNT/polymer membranes.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Membrane Separation and Gas Transport · Advanced Sensor and Energy Harvesting Materials · Surface Modification and Superhydrophobicity

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Bioengineering, Engineering Research Center of Application and Transformation for Synthetic Biology, Dalian University of Technology, Dalian 116024, China

Intensive Care Unit, Biomedical Research Center, Shenzhen Institute of Translational Medicine, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, China

Ningbo Institute of Dalian University of Technology, Ningbo 315016, China

Shenzhen Key Laboratory of Nanozymes and Translational Cancer Research, Department of Otolaryngology, Shenzhen Institute of Translational Medicine, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen 518035, China

Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China

Carbon Research Laboratory, State Key Laboratory of Fine Chemicals, School Chemical Engineering, Dalian University of Technology, Dalian 116024, China

Funding

National Key Research and Development Program of China · China Postdoctoral Science Foundation · Basic and Applied Basic Research Foundation of Guangdong Province · National Natural Science Foundation of China

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