COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
·
IF 9.463
Shenghe Zhang,Fukai Chu,Yifan Zhou,Zhoumei Xu,Xin Jiang,Xiaoyu Luo,Guojie Yuan,Yuan Hu,Weizhao Hu
Bio-based flexible polyurethane (PU) with fire-retardancy can not only relieve the pressure of limited fossil resources, but also effectively solve the serious problem derived from fire accident. Herein, diphenylphosphinyl chloride and 3-aminopropyltriethoxysilane (KH550) were introduced into the castor oil molecular chain, and modified castor oil (CPK) was successfully synthesized. By using CPK to replace part of the original polyol, we had prepared flexible PU: The PU/CPK 15.0 mol% sample successfully passed the vertical combustion test and achieved the eminent flame-retardant and smoke-suppressing effect. In the rapid adsorption test of organic solvents, both toluene and n-hexane can be quickly and completely absorbed by the modified foam sample, while the unmodified foam was not good as that. Besides, the modified foam also met certain mechanical properties. This work broadens the thinking for the preparation of high-performance flexible PU materials with green intrinsic fire-retardancy.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Lunqiang Jin,Yusha Gao,Yanping Huang,Minghui Ou,Zhen Liu,Xiang Zhang,Chao He,Baihai Su,Weifeng Zhao,Changsheng Zhao
Oil spills and pollution of oily wastewater from the industrial field have not only caused serious economic losses but also imposed a huge threat to human beings. To solve these issues, the development of advanced materials and technologies for the purification of oily wastewater has garnered great concern and become a central topic. Hence, a superhydrophobic polyurethane (PU) sponge adsorbent is designed via mussel-inspired coatings by double bonds to PU sponge, followed by in situ polymerization with 1-hexadecene. The prepared PU sponge adsorbent (PU@DB@16ene sponge) showed outstanding mechanical properties including low density, high porosity, and compression recovery ability. Moreover, the prepared PU@DB@16ene sponge showed excellent adsorption of oils and organic solvents (up to 187 g g–1) and exhibited superior recyclability. Particularly, when the PU@DB@16ene sponge was applied in the continuous and rapid separation of oils and organic solvents, it still showed desired properties at a rapid velocity of 8.3 L m–3 s–1. Additionally, the PU@DB@16ene sponge could not only adsorb organic solvents in laboratories but also adsorb crude oil and industrial waxy oil in practice. Therefore, we proposed a simple and convenient method to construct PU sponge absorbents with great application prospects, which would be highly valuable for crude oil and organic solvents cleanup.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
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2019
·
IF 3.327
Xin Wang,Shibin Nie,Ping Zhang,Lei Song,Yuan Hu
A facile approach to preparing functionalized graphene aerogels (FGAs) with superhydrophobic and superoleophilic properties was developed by modifying graphene aerogels with poly(dimethylsiloxane) (PDMS). The as-prepared FGAs displayed mesoporous structure with a high aspect surface area (157 m 2 /g), which afforded a high adsorption capacity toward various organic solvents with a remarkable value of 48–96 g/g. In addition, the resultant FGAs also exhibited a high separation efficiency (≥99%), ultrafast removal (a few seconds), and good recycling performance (10 cycles, 99% retention) toward multiple hazardous organics (chloroform, dichloromethane, n-hexane, toluene, petroleum ether, etc.) in water. These findings provide a promising material to improve the removal efficiency of hazardous organics for water purification.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shihao Ji,Linlin Wang,Shengyu Feng,Lei Li
Foams are an intriguing class of porous and lightweight materials which have found widespread applications in thermal insulation, pollutant adsorption, catalyst support, and energy storage. However, their covalently cross-linked structure makes foam unable to be recycled, resulting in serious environmental burden. To address this challenge, we report the first example of closed-loop chemically recyclable foam. A simple, catalyst-free cryo-polymerization process with multifunctional amines and acetoacetates was utilized to successfully prepare a series of poly(vinylogous urethane) foams, containing dynamic covalent bonds which can selectively be cleaved on demand. The resulting foams exhibit macroporous structure with diameters exceeding 14 μm, pronounced thermal stability ( T d,5% > 262.5 °C), robust hydrophobicity (WCA > 93°) and unique reactivity. Applications have been demonstrated for efficient adsorption of organic solvents and anionic dyes. More importantly, the foams show excellent recyclability under acidic conditions with high monomer recovery yields of up to 97 % and high purity levels. Fresh foams could be regenerated from the retrieved building blocks, thus demonstrating efficient closed-loop recycling. This work provides a new “monomer-foam-monomer” ecological chain and may inspire the advancement of next-generation closed-looped recyclable foam materials.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 8
·1894-1901
·
IF 5.106
Yuetao Liu,Jiawen Sun,Junguo Yuan,Shuai Wang,Yu Ding,Yumin Wu,Chuanhui Gao
A type of thiophene-bridged silica aerogel was prepared from tetraethyl orthosilicate (TEOS) and 2,5-divinyltrimethoxysilanethiophene (DVTHP) through a facile sol–gel reaction and ambient pressure drying process. DVTHP was synthesized from vinyl trimethoxysilane and 2,5-dibromothiophene through the Heck reaction. FTIR and solid-state 1H CP/MAS NMR indicated that the thiophene units had been successfully introduced into the silica aerogel network. SEM showed a co-continuous porous structure and the Brunauer–Emmett–Teller (BET) measurements showed a mesoporous structure that had a high surface area of 834 m2 g−1, an average pore size of 17.84 nm and a large pore volume of 3.72 cm3 g−1. This thiophene-bridged silica aerogel had superhydrophobicity with a water contact angle (CA) exceeding 174° and a sliding angle of less than 3°. The silica aerogel had better selectivities for less polar or non-polar solvents than for polar solvents. The introduction of the thiophene unit could improve the adsorption properties. The adsorption capacities for n-hexane and gutter oil were calculated as 17 g g−1 and 16 g g−1, respectively. Moreover, the samples exhibited good recyclability for organic solvents even after recycling 10 times in adsorption/desorption tests and the adsorption capacities were nearly unchanged from the maximum uptake capacities. The results indicated that these materials could be flexibly utilized as adsorbent materials to selectively adsorb organic solvents for wastewater treatment.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
·
IF 10.383
Yehai Yan,Li Lu,Yuzhen Li,Wenqing Han,Ailin Gao,Shuai Zhao,Jian Cui,Guangfa Zhang
In view of the serious perniciousness and complex diversity of actual wastewater systems, exploiting a robust and multifunctional adsorbent material featuring high sorption efficiency, broad-spectrum applicability, and excellent recyclability in treating multifarious pollutants in water (such as oils and fluoride ions) is highly required; however, it is still a daunting goal to pursue to date. In this work, novel mechanically robust and exceptional graphene oxide/hydroxyapatite nanowire (GO/HAPNW) aerogels (RGHAs/polydopamine (PDA)@RGHAs) with adjustable surface wettability were developed through a facile sol–gel self-assembly technology and subsequently optional bioinspired hydrophilic modification. Thanks to the reinforcing effect of HAPNWs with higher aspect ratio, a remarkably improved mechanical robustness (including superior compressibility and superelasticity) was acquired for the resulting aerogels. Based on the cooperative effect of the favorable selective wetting properties (i.e., hydrophobic/oleophilic for RGHAs) and the excellent mechanic stability, the aerogels displayed an outstanding sorption performance for diverse oils/organic solvents accompanied with a prominent recyclability. Specifically, a fairly high adsorption capacity of as high as 191 times of its own mass (for pump oil) was achieved based on a fast adsorption kinetic process. More importantly, superamphiphilic three-dimensional (3D) PDA@RGHAs revealed an extraordinary removal capability for water-soluble fluoride ions, exhibiting a superior equilibrium adsorption capacity (qe, 9.93 mg/g), which is distinctly superior to those of low-dimensional fluorine adsorbent materials recently reported. Accordingly, the as-prepared 3D aerogels combining both superior oil/organic solvent adsorption and excellent defluorination capability reveal a competitive application prospect toward effective intricate oily wastewater purification.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Tao Liu
Designing a concise hydrophobic modification strategy for carbonaceous materials still faces challenge. In this work, the bottom-up method of growing polysiloxane nanofilaments is used for hydrophobic modification of bulk coke. Polysiloxane nanofilaments formed on the bulk coke surface not only reduce the surface energy, but also increase the surface roughness, thus achieving the synchronization of roughening and energy reduction. The water contact angle of modified coke can be up to 144°, showing an outstanding water repellency. Depending on the imparted hydrophobicity, the modified coke can be used as a novel carbonaceous sorbent to selectively remove hydrophobic organic solvents from water. A diverse of different organic solvents can be absorbed by the modified coke. After 20 consecutive cycles, the value of absorption capacity of the modified coke still remains stable, holding an exceptional recyclability. The utilization method of coke and the hydrophobic modification strategy proposed in this work provide a new idea for the functionalization of other carbonaceous materials.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2020
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IF 4.495
Yubao Bi,Haijun Zhang,Huifang Wang,Quanli Jia,Shaowei Zhang
Hydrophobic sorbents play a key role in the remediation processes of oil spills/leakages occurring globally. In present work, reduced graphene oxide modified porous diatomite ceramics with hierarchical pore structures and excellent mechanical strength were facilely fabricated using diatomite powder and graphene oxide as starting materials. The microstructures and absorption properties of reduced graphene oxide modified porous diatomite ceramics were investigated, and the results indicated that reduced graphene oxide entered into the pores of diatomite ceramics, and formed a membrane coating on the wall of the pores, which made the diatomite ceramics a highly efficient absorption for organic solvents , and the capability separating the organic counterpart from the oil/water mixture.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2012
·Vol. 213
·期 14
·1435-1440
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IF 2.361
Dazhi Tan,Wenjie Fan,Wannan Xiong,Hanxue Sun,Yaqi Cheng,Xiaoyu Liu,Changgong Meng,An Li,Wei-Qiao Deng
Two-dimensional conjugated microporous polymers (CMPs) composed of alternative phenylene and ethynylene units are synthesized, by cross-coupling polymerization of 1,3,5-triethynylbenzene and 1,3,5-tribromobenzene with various solvents. Our work shows that the morphology of CMPs is greatly affected by the choice of solvents used in synthesis. Sphere, tubular, and plate-like structures are received by using the toluene, p-xylene, and mesitylene solvents, respectively. Our results demonstrate that the morphology of CMPs affects the storage capacity for organic solvents remarkably, with the plate-like CMP showing best performance. This work is expected to provide useful guidance to rationally design CMPs as absorbent materials for organic solvents.
研究领域:
高分子化学
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材料科学
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纳米科技
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吸附分离
✓ 已验证
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2021
·Vol. 4
·期 3
·459-468
·
IF 5.693
Gu Hongbo,Gao Chong,Zhou Xiaomin,Du Ai,Naik Nithesh,Guo Zhanhu
In this work, in order to ameliorate the hydrophobic property and adsorption capacity of nanocellulose (NC) aerogel, the nanochitosan (NCS) and reduced graphene oxide (rGO) have been introduced into the NC aerogel to construct the NC/NCS/rGO nanocomposite aerogel by a hydrothermal method combined with freeze-drying method. The optimal conditions including the effect of NC and NCS weight percentages for preparation of NC/NCS/rGO nanocomposite aerogel with good porous microstructures and excellent adsorption capacities have been evaluated. The results demonstrate that the NC/NCS/rGO nanocomposite aerogel produced under the fabrication condition of 0.1 wt% NCS and 0.05 wt% NC exhibits a very low density of 9.3 mg cm −3 , a high hydrophobicity with a large water contact angle (115.26°) and the high adsorption capacities of 171.85 ± 3.02, 159.64 ± 1.83, 153.22 ± 2.92, 149.60 ± 6.26, 139.93 ± 3.69, 132.47 ± 3.45, 176.82 ± 4.66, 128.70 ± 0.69, and 120.34 ± 5.57 g g −1 to mineral oil, sesame oil, acetone, ethyl acetate, thiophene, pump oil, waste pump oil, kerosene, and ethyl alcohol, respectively. In addition, this aerogel adsorbent could efficiently and continuously remove/collect the oil from wastewater confirmed by a designed oil/water pump apparatus. As a consequence, this NC/NCS/rGO nanocomposite aerogel has a potential application in the oil and organic solvent adsorption. Graphical abstract
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2020
·Vol. 3
·期 4
·473-484
·
IF 0
Wang Yaqing,Xie Wenhao,Liu Hu,Gu Hongbo
Three-dimensional (3D) porous network materials with large pore volume, high specific surface area, and controllable porosity have potential application in wastewater treatment. This work aims to develop a novel hyperelastic and ultra-light magnetic reduced graphene oxide (rGO-Fe 3 O 4 ) 3D framework with a density of 4.52 mg cm −3 through a covalent bond of aminated nanomagnetite (Fe 3 O 4 -NH 2 ) onto graphene oxide (GO) and subsequent reduction. This 3D framework exhibited high adsorption capacities to ethyl acetate (215.8 ± 11.8 g g −1 ), cyclohexane (239.7 ± 9.9 g g −1 ), acetone (149.1 ± 6.5 g g −1 ), dichloromethane (308.0 ± 16.4 g g −1 ), and sesame oil (204.7 ± 10.2 g g −1 ), which were much higher than those of pure rGO aerogel (45.6 ± 2.3 g g −1 to ethyl acetate). Meanwhile, the 3D framework demonstrated superelastic mechanical properties with a 100% recoverability during the cyclic compression loading tests under an optimal fabrication condition of 1 mg mL −1 GO concentration and 3:1 mass ratio of GO to Fe 3 O 4 -NH 2 nanoparticles. Most importantly, this rGO-Fe 3 O 4 3D framework could achieve an effective oil/water separation within only 25 s and maintained an outstanding adsorption capability to ethyl acetate after 10 cycles of the adsorption/desorption process without any obvious change, depicting an excellent recyclability and reusability. This work aims to provide a promising material for environmental control and oil/organic solvent adsorption. Graphical abstract Hyperelastic and ultra-light magnetic reduced graphene oxide 3D frameworks demonstrate a superb oil and organic solvent adsorption capacity.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）