|
1
|
Zhou S, Mei Y, Yang W, Jiang C, Guo H, Feng SP, Tang CY. Energy harvesting from acid mine drainage using a highly proton/ion-selective thin polyamide film. WATER RESEARCH 2024; 255:121530. [PMID: 38564897 DOI: 10.1016/j.watres.2024.121530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/23/2024] [Accepted: 03/26/2024] [Indexed: 04/04/2024]
Abstract
A huge chemical potential difference exists between the acid mine drainage (AMD) and the alkaline neutralization solution, which is wasted in the traditional AMD neutralization process. This study reports, for the first time, the harvest of this chemical potential energy through a controlled neutralization of AMD using H+-conductive films. Polyamide films with controllable thickness achieved much higher H+ conductance than a commercially available cation exchange membrane (CEM). Meanwhile, the optimal polyamide film had an excellent H+/Ca2+ selectivity of 63.7, over two orders of magnitude higher than that of the CEM (0.3). The combined advantages of fast proton transport and high proton/ion selectivity greatly enhanced the power generation of the AMD battery. The power density was 3.1 W m-2, which is over one order of magnitude higher than that of the commercial CEM (0.2 W m-2). Our study provides a new sustainable solution to address the environmental issues of AMD while simultaneously enabling clean energy production.
Collapse
Affiliation(s)
- Shenghua Zhou
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR 999077, PR China
| | - Ying Mei
- Research and Development Center for Watershed Environmental Eco-Engineering, Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai 519087, PR China.
| | - Wulin Yang
- College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China
| | - Chenxiao Jiang
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230052, PR China
| | - Hao Guo
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR 999077, PR China; Institute of Environment and Ecology, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Shien-Ping Feng
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR 999077, PR China; Department of Advanced Design and Systems Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, PR China
| | - Chuyang Y Tang
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR 999077, PR China.
| |
Collapse
|
|
2
|
Li X, Zheng R, Wang C, Chang H, Chen S, Wang L, Cui X, Liu Y, Li J, Yu G, Shi J. Preparation and Properties of Low-Dielectric Polyimide Films Containing Tert-Butyl. Polymers (Basel) 2024; 16:984. [PMID: 38611242 PMCID: PMC11014062 DOI: 10.3390/polym16070984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024] Open
Abstract
The design of high-performance polyimide (PI) films and understanding the relationship of the structure-dielectric property are of great significance in the field of the microelectronics industry, but are challenging. Herein, we describe the first work to construct a series of novel tert-butyl PI films (denoted as PI-1, PI-2, PI-3, and PI-4) based on a low-temperature polymerization strategy, which employed tetracarboxylic dianhydride (pyromellitic anhydride, 3,3',4,4'-biphenyl tetracarboxylic anhydride, 4,4'-diphenyl ether dianhydride, and 3,3',4,4'-benzophenone tetracarboxylic anhydride) and 4,4'-diamino-3,5-ditert butyl biphenyl ether as monomers. The results indicate that introducing tert-butyl branches in the main chain of PIs can enhance the free volume of the molecular chain and reduce the interaction between molecular chains of PI, resulting in a low dielectric constant. Particularly, the optimized PI-4 exhibits an excellent comprehensive performance with a high (5) wt% loss temperature (454 °C), tensile strength (117.40 MPa), and maximum hydrophobic angle (80.16°), and a low dielectric constant (2.90), which outperforms most of the results reported to date.
Collapse
Affiliation(s)
- Xin Li
- School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; (X.L.); (L.W.); (X.C.); (Y.L.); (J.L.); (G.Y.); (J.S.)
| | - Rongrong Zheng
- School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; (X.L.); (L.W.); (X.C.); (Y.L.); (J.L.); (G.Y.); (J.S.)
| | - Cheng Wang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;
- Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 522000, China
| | - Haiyang Chang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;
- Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 522000, China
| | - Shuwu Chen
- Aromatics Laboratory, Liaoyang Petrochemical Company, Liaoyang 111003, China;
| | - Liyan Wang
- School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; (X.L.); (L.W.); (X.C.); (Y.L.); (J.L.); (G.Y.); (J.S.)
| | - Xue Cui
- School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; (X.L.); (L.W.); (X.C.); (Y.L.); (J.L.); (G.Y.); (J.S.)
| | - Yutao Liu
- School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; (X.L.); (L.W.); (X.C.); (Y.L.); (J.L.); (G.Y.); (J.S.)
| | - Junhao Li
- School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; (X.L.); (L.W.); (X.C.); (Y.L.); (J.L.); (G.Y.); (J.S.)
| | - Guangning Yu
- School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; (X.L.); (L.W.); (X.C.); (Y.L.); (J.L.); (G.Y.); (J.S.)
| | - Ji Shi
- School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; (X.L.); (L.W.); (X.C.); (Y.L.); (J.L.); (G.Y.); (J.S.)
| |
Collapse
|
|
3
|
Recent Advanced Development of Acid-Resistant Thin-Film Composite Nanofiltration Membrane Preparation and Separation Performance in Acidic Environments. SEPARATIONS 2022. [DOI: 10.3390/separations10010020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Membrane filtration technology has attracted extensive attention in academia and industry due to its advantages of eco-friendliness related to environmental protection and high efficiency. Polyamide thin-film composite nanofiltration (PA TFC NF) membranes have been widely used due to their high separation performance. Non-acid-resistant PA TFC NF membranes face tremendous challenges in an acidic environment. Novel and relatively acid-resistant polysulfonamide-based and triazine-based TFC NF membranes have been developed, but these have a serious trade-off in terms of permeability and selectivity. Hence, how to improve acid resistance of TFC NF membranes and their separation performance in acidic environments is a pivotal issue for the design and preparation of these membranes. This review first highlights current strategies for improving the acid resistance of PA TFC NF membranes by regulating the composition and structure of the separation layer of the membrane performed by manipulating and optimizing the construction method and then summarizes the separation performances of these acid-resistant TFC NF membranes in acidic environments, as studied in recent years.
Collapse
|
|
4
|
Jin Y, Huang L, Zheng K, Zhou S. Blending Electrostatic Spinning Fabrication of Superhydrophilic/Underwater Superoleophobic Polysulfonamide/Polyvinylpyrrolidone Nanofibrous Membranes for Efficient Oil-Water Emulsion Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8241-8251. [PMID: 35772102 DOI: 10.1021/acs.langmuir.2c00640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The scarcity of water resources has led to widespread interest in the treatment of oily wastewater. This study prepared a novel superhydrophilic/underwater superoleophobic polysulfonamide (PSA)/polyvinylpyrrolidone (PVP) nanofibrous membrane through electrostatic spinning for efficient oil-water emulsion separation. The surface morphology, fiber diameter distribution, wettability properties, and oil-water emulsion separation performance of the membranes were investigated. Results showed that the addition of PVP increases the diameter of the fibers, which led to a loose, large, porous structure and improved the permeability of the membranes. A high pure-water flux of 2057 L·m-2·h-1 was obtained for membranes with PVP addition of 3 wt%, providing an 835% increase in pure-water flux compared with a pure PSA nanofibrous membrane (220 L·m-2·h-1). For n-hexane-in-water emulsions, the optimum membrane obtained a high separation efficiency of 99.7%, in which flux was 1.5 times greater than that of the pure PSA nanofibrous membrane. Moreover, the optimum membrane exhibited good recycling stability and solvent resistance. The as-prepared PSA/PVP nanofibrous membrane displayed high permeability, an outstanding rejection rate, resistance to organic solvents, and reusability for oil-water separation, providing great potential in practical membrane separation applications.
Collapse
Affiliation(s)
- Yuting Jin
- School of Environment and Energy, Guangzhou Higher Education Mega Center, South China University of Technology, Guangzhou 510006, PR China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou 510006, PR China
| | - Longwei Huang
- School of Environment and Energy, Guangzhou Higher Education Mega Center, South China University of Technology, Guangzhou 510006, PR China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou 510006, PR China
| | - Ke Zheng
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, PR China
- College of Resource and Environmental Engineering, Guizhou University, Guiyang 550003, China
| | - Shaoqi Zhou
- School of Environment and Energy, Guangzhou Higher Education Mega Center, South China University of Technology, Guangzhou 510006, PR China
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, PR China
- College of Resource and Environmental Engineering, Guizhou University, Guiyang 550003, China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou 510006, PR China
| |
Collapse
|
|
5
|
Zhang Y, Guo Y, Wan Y, Pan G, Yu H, Du W, Shi H, Zhao M, Zhao G, Wu C, Liu Y. Tailoring molecular structure in the active layer of thin-film composite membrane for extreme pH condition. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03155-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|