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Shi G, Wu M, Zhong Q, Mu P, Li J. Superhydrophobic Waste Cardboard Aerogels as Effective and Reusable Oil Absorbents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:7843-7850. [PMID: 34133186 DOI: 10.1021/acs.langmuir.1c01216] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
As the main component of the municipal waste, waste cardboard has caused a host of environmental problems. Therefore, the reasonable disposal of waste cardboard is of great significance to global sustainable development and green economics. Herein, using waste cardboard as the raw material, a superhydrophobic aerogel has been developed with a unique three-dimensional porous network structure, which exhibits excellent selective oil absorption capacities. The aerogel was made by combining Ca2+ cross-links and postmodification with stearic acid. Superhydrophobic aerogels can absorb various organic solutions and its maximum absorption capacity can reach 47 times its own weight. Meanwhile, the size of aerogels has been further expanded, with a diameter of 21.2 cm and a height of 3.2 cm, which can absorb 34 times its own weight of kerosene. More importantly, the aerogel can also absorb oil droplets in oil/water emulsions with an adsorption efficiency of over 98.5%. Moreover, the aerogel can be employed multiple times without significantly reducing the adsorption capacity via distillation or squeezing, depending upon the type of pollutions. Consequently, we believe that these facile and inexpensive superhydrophobic aerogels can effectively adsorb oily wastewater, which matches well with the requirement for environmentally friendliness from the perspective of practical application.
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Affiliation(s)
- Guogui Shi
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
| | - Mingming Wu
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
| | - Qi Zhong
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
| | - Peng Mu
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
| | - Jian Li
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
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Erdem A. Synthesis and characterization of polypropylene glycol‐based novel organogels as effective materials for the recovery of organic solvents. J Appl Polym Sci 2021. [DOI: 10.1002/app.49997] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ahmet Erdem
- Department of Biomedical Engineering Kocaeli University Kocaeli Turkey
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Ruan Z, Ran J, Liu S, Chen Y, Wang X, Shi J, Zhu L, Zhao S, Lin J. Controllable preparation of magnetic carbon nanocomposites by pyrolysis of organometallic precursors, similar molecular structure but very different morphology, composition and properties. NEW J CHEM 2021. [DOI: 10.1039/d0nj05699e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Organometallic compounds were synthesized for solid-state pyrolysis to research the structure–property relationship between the precursors and the as-generated magnetic carbon nanocomposites.
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Affiliation(s)
- Zhijun Ruan
- Hubei Key Laboratory of Processing and Application of Catalytic Materials
- College of Chemistry and Chemical Engineering
- Huanggang Normal University
- Huanggang 438000
- China
| | - Jingwen Ran
- Hubei Key Laboratory of Processing and Application of Catalytic Materials
- College of Chemistry and Chemical Engineering
- Huanggang Normal University
- Huanggang 438000
- China
| | - Shanshan Liu
- Hubei Key Laboratory of Processing and Application of Catalytic Materials
- College of Chemistry and Chemical Engineering
- Huanggang Normal University
- Huanggang 438000
- China
| | - Yanmei Chen
- Hubei Key Laboratory of Processing and Application of Catalytic Materials
- College of Chemistry and Chemical Engineering
- Huanggang Normal University
- Huanggang 438000
- China
| | - Xichao Wang
- Hubei Key Laboratory of Processing and Application of Catalytic Materials
- College of Chemistry and Chemical Engineering
- Huanggang Normal University
- Huanggang 438000
- China
| | - Jie Shi
- School of Food and Biological Engineering
- Hefei University of Technology
- Hefei 230009
- China
| | - Lihong Zhu
- Hubei Key Laboratory of Processing and Application of Catalytic Materials
- College of Chemistry and Chemical Engineering
- Huanggang Normal University
- Huanggang 438000
- China
| | - Shengfang Zhao
- Hubei Key Laboratory of Processing and Application of Catalytic Materials
- College of Chemistry and Chemical Engineering
- Huanggang Normal University
- Huanggang 438000
- China
| | - Junqi Lin
- Hubei Key Laboratory of Processing and Application of Catalytic Materials
- College of Chemistry and Chemical Engineering
- Huanggang Normal University
- Huanggang 438000
- China
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Lu J, Li Y, Song W, Losego MD, Monikandan R, Jacob KI, Xiao R. Atomic Layer Deposition onto Thermoplastic Polymeric Nanofibrous Aerogel Templates for Tailored Surface Properties. ACS NANO 2020; 14:7999-8011. [PMID: 32644796 DOI: 10.1021/acsnano.9b09497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Poly(vinyl alcohol-co-ethylene) (EVOH) nanofibrous aerogel (NFA) templates were fabricated through vacuum freeze-drying from EVOH nanofibrous suspensions. Aluminum oxide (Al2O3) layers were deposited onto highly porous templates to form organic-inorganic hybrid aerogels by the atomic layer deposition (ALD) technique. Chemical and physical measurements showed that mechanical properties were improved through ALD. In addition, the surface chemistry of ALD modified aerogels showed a fascinating cyclic change based on the number of ALD deposition cycles. A transition from hydrophilicity to hydrophobicity was observed after a few cycles of ALD coating; however, additional deposition cycles changed the wettability characteristics back to hydrophilicity. This hydrophilic-hydrophobic-hydrophilic variation is shown to be governed by a combination of geometrical and chemical surface properties. Furthermore, the deposited Al2O3 could substantially improve aerogels strength and reduce permanent deformation after cyclic compression. The Young's modulus of aerogels increased from 5.54 to 33.27 kPa, and the maximum stress at 80% strain went up from 31.13 to 176.11 kPa, after 100 cycles of trimethyl-aluminum (TMA)/water ALD. Thermogravimetric analysis (TGA) results confirm that ALD can effectively improve the heat resistance characteristics of polymeric aerogel. The onset temperature and the residual mass increased with increasing numbers of ALD cycles. During pyrolysis, the nanofiber cores were decomposed, and the brittle pure Al2O3 self-supporting nanotube aerogels with the continuous hollow nanotubular network were formed. A coating of continuous thickness Al2O3 layer on individual nanofiber was achieved after 100 ALD cycles. In additional to mechanical strength and physical property changes, the ALD modified aerogel also shows a superhydrophobic and oleophilic surface chemistry, which could potentially be used to remove oils/organic solvents from water. The resultant aerogels exhibit excellent absorption capacity (31-73 g/g) for various liquids, and the material could be reused after distillation or squeezing. A successful scale-up of such materials could provide some insights into the design and development of thermoplastic polymeric NFAs with substantial industrial applications.
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Affiliation(s)
- Jianwei Lu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- The Georgia W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Yi Li
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Renewable Bioproducts Institute, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Wei Song
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Mark D Losego
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Renewable Bioproducts Institute, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Rebhadevi Monikandan
- Materials Characterization Facility, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Karl I Jacob
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- The Georgia W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Renewable Bioproducts Institute, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Ru Xiao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
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