CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Lan He,Jingjing He,Xinyu Qi,Weijie Wei,Xiaqing Zhang,Jiang Wang,Jin Li,Zhuwei Gao
The pollution of water bodies by oil-containing compounds is increasing. Therefore, new oil-water separation adsorbents are under constant development. In this paper, melamine sponges with three-dimensional flexible porous framework are used to prepare oil-water separation adsorbents. Using a convenient one-step impregnation coating method, the material (THS@MS) was prepared by directly alkylating melamine sponge with a Trimethoxy (1 H, 1 H, 2 H, 2 H-heptadecafluordecyl) silane solution in an acidic (pH=5.5) ethanol solution. The adsorbent was superhydrophobic and had a strong oil adsorption capacity, ranging from 62.03 g/g to 71.33 g/g for various oils and organic compounds. After 50 cycles of oil-water separation, the separation efficiency remained above 95 %. The sponge remained in the superhydrophobic range after multiple separation tests. At this point, the hydrophobicity angle dropped by only a small value of 157.88 ° (compared to 158.57 ° in the original THS@MS test). THS@MS could be used to treat emulsion separations and is highly resistant to strong acid and alkali solutions. Its superhydrophobic properties enhanced self-cleaning ability and provided excellent environmental adaptability. The sponge showed great promise for wide application in real industries.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
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2019
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IF 3.073
Meihong Liu,Yiyang Wu,Yuchen Wu,Mingfu Gao,Zhenhua Lü,Sanchuan Yu,Congjie Gao
In this study, hydroxyethyl cellulose (HEC) was cross-flow deposited on flat-sheet polypropylene (PP) porous support and insolubilized by cross-linking using glutaraldehyde (GA) to fabricate cost-effective thin-film composite membrane for aqueous and non-aqueous nanofiltration. Membrane physico-chemical property, permeation performance, as well as tolerance to acid, alkaline and organic solvents were systematically characterized. The obtained HEC/PP composite membrane was found to be effectively modulated in pore size via changing HEC and GA contents and possessed good fabrication reproducibility. The desired HEC/PP composite membrane with an average pore diameter of around 2.21 nm exhibited high fluxes of 41.0 and 8.2 L/m 2 h to pure water and ethanol, respectively, and removals of 99.9%, 99.9% and 96.7% to 50 mg/L dye aqueous solutions of methyl blue, Congo red and sunset yellow, respectively. Soaking tests revealed that the HEC/PP composite membrane possessed good tolerance to acid, alkali and organic solvents of tetrahydrofuran, ethyl acetate and ethanol. Continuous filtration of dye/ethanol solution demonstrated that the HEC/PP membrane possessed excellent long-term durability in ethanol solution, maintaining a stable flux higher than 4.6 L/m 2 h and removals of 95.4% and 84.2% to methyl blue and Congo red, respectively, during the whole filtration of 110 h.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Na Zhang,Qiang Li,Chunhui Li,Zhen Li,Li Zhao,Xiaotai Zhang,Yi Wang,Zhenghua Li,Xianghua Dou,Wanling Cui,Saisai Li
In this report, a highly ordered mesostructured flexible silica-based nanofiltration membrane is fabricated using tetraethyl orthosilicate (TEOS) as a silica source and Pluronic F127 copolymer as a structure directing agent , and hydrolyzed polyacrylonitrile ultrafiltration membrane as a substrate by an evaporation induced self-assembly approach. The results show the fabricated silica/F127 (SF) composite membrane possesses ordered mesostructures with different space groups depending on the mass ratios of TEOS/F127. The membrane is negatively charged with an isoelectric point at pH 2.9, and it also has a very hydrophilic surface. The pure water permeability of the membrane is 32 Lm −2 h −1 bar −1 . The membrane also has high rejections to methyl blue (100%) and multivalent salts ( > 95%), and moderate rejection to divalent salt (78.5% for Na 2 SO 4 ). The ordering of the mesostructure enhances the membrane compactness, favoring the improvement of the separation performance. Additionally, the membrane possesses satisfactory resistances to humic acid (HA) and bull serum albumin (BSA) fouling, and bacteria adhesion due to the smooth and hydrophilic surface. Additionally, the salt rejection is stable in 0.5 M HCl for 11 h and/or active chlorine solution (pH = 5) with 9000 ppm·h chlorination strength accompanied by an obvious increase in permeate flux. The membrane also exhibits satisfactory performance stability in a long-term (168 h) running.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2023
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IF 5
Jing Li,Jian Lu,Haoqi Sang,Yu Zhang,Benkun Qi,Jianquan Luo,Yinhua Wan,Yongbing Zhuang
Direct separation of lignin from fully acidic deep eutectic solvent (DES) is challenging because of its high viscosity and acidity. In this study, three synthesized DES-resistant polyimides (PIs), namely, B-PI, 6F-PI, and P-PI based on 4′,6-diamidino-2-phenylindole (DAPI) with 4,4′-(4,4′-isopropylidenediphenoxy)bis-(phthalic anhydride) (BPADA), 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and pyromellitic dianhydride (PMDA), respectively, were used to prepare ultrafiltration (UF) membranes for the direct separation of sodium lignosulfonate (LS) from its DES (choline chloride:lactic acid) solutions for the first time. The morphology, pore size, surface property, degree of swelling, LS separation performance, and long-term stability of the resulting UF membranes were investigated in detail. The average pore sizes were in the range of 3.60–5.06 nm, and the LS rejections, as well as the DES fluxes, were 44.0–66.4% and 4.71–16.55 L·m–2 h–1, respectively, both higher than those from commercial ZrO2/TiO2 membrane (25.6% and 1.91 L·m–2 h–1). Among them, the B-PI membrane had the best separation performance and excellent operating stability for 20 h due to its low fractional free volume and poor affinity with DES. Swelling and positive charges of membrane surface in the DES system decreased LS rejection. In addition, a higher degree of swelling and affinity with DES led to an increased DES flux when compared with the aqueous system. Herein the PI-based UF membranes are promising for the direct lignin separation process, especially in an acidic DES system.
研究领域:
材料科学
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化学工程
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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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2020
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IF 8.758
Tianyue Ma,Chunyu Yang,Wei Guo,Huiming Lin,Feng Zhang,Haixia Liu,Le Zhao,Ye Zhang,Yuzhu Wang,Yitong Cui,Jingxiang Zhao,Fengyu Qu
Solar-driven water evaporation provides a promising solution to the energy crisis and environmental issues. Capitalizing on the high photothermal conversion efficiency and excellent resistance to strong acids or strong alkalis of Pt3Ni–S nanowires, we strategically design and prepare a flexible Pt3Ni–S-deposited Teflon (PTFE) membrane for achieving efficient strong acid/alkaline water evaporation under simulated sunlight irradiation (1 sun). By comparing the surface morphology, mechanical properties, and water evaporation performance of the as-prepared three different membranes, we have screened out a high-performance photothermal membrane that has good hydrophobicity (water contact angle = 106°), strong mechanical properties, high light-to-heat conversion efficiency (η = 80%), and excellent durability (10 cycles in a range of pH = 1.2–12). In particular, we explore the mechanism of high surface mechanical properties of the as-prepared membrane using density functional theory. The results demonstrate that the related mechanism can be ascribed to two main reasons: (1) hydrogen bonds can be formed between the 2-pyrrolidone ring and PTFE-3 and (2) the O atom in PTFE-3 carries more negative charge (−0.19 |e|) than PTFE-1 (−0.16 |e|) and PTFE-2 (−0.15 |e|). Our work highlights the great potentials of a Pt3Ni–S-deposited PTFE membrane as a device for implementing solar energy-driven evaporation of industrial wastewater with strong acidity or alkalinity and provides a new strategy for improving the surface mechanical properties of a photothermal membrane.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Mengyue Wang,Wentao Dong,Xi Lu,Qin Yang,Bin Yan
In this work, we developed a high-performance two-component epoxy adhesive from two biobased triple-functional and hexa-functional epoxy monomer from lignin-derived monomer eugenol, and a cellulose-derived furfuryl diamine for metal substrates. Through a tight cross-linked network and rich electronegative structure, the adhesives showed excellent adhesive performance to various metal substrates, especially for Fe. It demonstrated a high lap shear strength up to 19.8 MPa to Fe substrate, surpassing most reported epoxy adhesives. Moreover, these adhesives exhibited excellent long-term adhesion properties in high-temperature and acidic/base aqueous environments. It can maintain more than 95% of the adhesive strength to Fe substrate after soaking in different acid-base environments for 7 days, and achieved a maximum adhesion strength of 16.46 MPa to Fe substrates at 200 °C only 14.2% decrease when compared to that at room temperature. Molecular simulations revealed that these two adhesives could rapidly achieve dynamic equilibrium with Fe (110) surface in 15 and 22 ps which was much shorter than that to Cu and Al, suggesting a stronger binding energy between these adhesive and Fe surfaces and was consistent with the adhesion performance. This work widens the way for high-performance bio-based epoxy adhesives to be used in more demanding environments.
研究领域:
材料科学
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生物化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Shenghui Ning,Guangyi Tian,Fuchao Yang
With the frequent occurrence of oil spill accidents and the increasing discharge of industrial oily wastewater, oil–water separation has become a global challenge to protect the ecological environment. Simple, fluorine-free preparation of high-throughput superhydrophobic materials is important for realizing efficient separation of oil/water mixtures. Paper-based materials have several advantages, such as low price and renewability, which make them valuable for applications. In this work, we propose a simple and economical two-part immersion technique to prepare superhydrophobic cellulose paper, which is modified with octadecyltrichlorosilane (OTS) directly and then assembled hydrophobic silica. The prepared functionalized paper is not only superhydrophobic (static water contact angle up to 157°) and superoleophilic, but also exhibits acid and alkali resistance and abrasion cycle resistance. After 10 separation cycles for a variety of heavy oil/water mixtures, the separation efficiency was as high as 99.31 % with fluxes greater than 5100 L/(m 2 ·h). This simple, scalable, low-cost superhydrophobic paper shows great potential in the field of oil/water separation.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Chunxia Zhao,Jiaxin Li,Zhuo Chen,Haoran Huang,Jinbo Cheng,Dong Xiang,Zhenyu Li,Yuntao Li,Yuanpeng Wu
The oil spill and industrial oily wastewater in large quantities has caused severe harm to the environment and human health, which make an urgent requirement to develop low-cost, eco-friendly, stable performance and highly efficient oil/water separation materials. Herein, a superhydrophobic/superlipophilic melamine sponge with excellent hydrophobic stability was successfully fabricated via one-step emulsion polymerization . During polymerization, trimethylolpropane triacrylate (TMPTA) and polyethylene imine (PEI) form robust microspheres , and polydimethylsilane (PDMS) cross-links to form hydrophobic coating on the original sponge skeleton. The modified sponge could continuously separate various immiscible oil/water mixtures under harsh conditions (including strong acids, strong bases, salts). Even after 10 consecutive cycles, the separation efficiency for toluene and petroleum ether exceeds 99.87%. In addition, the as-prepared sponge exhibited extraordinarily high oil absorption capacities (with a maximum saturated oil absorption of 107.31 g/g for chloroform) and excellent reversible compressibility (up to 100 compression cycles). More importantly, the pore size of modified sponge was adjusted through a simple mechanical compression strategy so that the compressed sponge met the particle size screening requirements to effectively separate the surfactant-stabilized water-in-oil emulsions. Based on the simple preparation protocol, fluorine-free raw materials, and excellent properties, the MS-TMPTA/PEI-PDMS sponge presented here have extremely promising application potential in oil/water separation.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Biomaterials Research
·
2022
·Vol. 26
·期 1
·1-20
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IF 15.863
Luan Zhaohui,Liu Shuang,Wang Wei,Xu Kaige,Ye Shaosong,Dan Ruijue,Zhang Hong,Shu Zhenzhen,Wang Tongchuan,Fan Chaoqiang,Xing Malcolm,Yang Shiming
Background Wound closure in the complex body environment places higher requirements on suture’s mechanical and biological performance. In the scenario of frequent mechanical gastric motility and extremely low pH, single functional sutures have limitations in dealing with stomach bleeding trauma where the normal healing will get deteriorated in acid. It necessitates to advance suture, which can regulate wounds, resist acid and intelligently sense stomach pH. Methods Based on fish swim bladder, a double-stranded drug-loaded suture was fabricated. Its cytotoxicity, histocompatibility, mechanical properties, acid resistance and multiple functions were verified. Also, suture’s performance suturing gastric wounds and Achilles tendon was verified in an in vivo model. Results By investigating the swim bladder’s multi-scale structure, the aligned tough collagen fibrous membrane can resist high hydrostatic pressure. We report that the multi-functional sutures on the twisted and aligned collagen fibers have acid resistance and low tissue reaction. Working with an implantable “capsule robot”, the smart suture can inhibit gastric acid secretion, curb the prolonged stomach bleeding and monitor real-time pH changes in rabbits and pigs. The suture can promote stomach healing and is strong enough to stitch the fractured Achilles tendon. Conclusions As a drug-loaded absorbable suture, the suture shows excellent performance and good application prospect in clinical work.
研究领域:
生物医学工程
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组织工程
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材料科学
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外科技术
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胃肠病学
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骨科
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Yafei Su,Huawen Peng,Yongjin Hu,Shaoping Li,Jingyi Rao,Qiang Zhao
Conventional polyamide and polyester thin film composite membranes (TFCMs) are susceptible to harsh conditions, because the amide and ester bonds in them will degrade under extreme pH or chlorine oxidants. This work addressed this problem by preparing TFCMs through the Hoffmann alkylation reaction. Two monomers, i.e., 1,4,7,10-Tetraazacyclododecane (TAD) and 1,2,4,5-Tetrakis(bromomethyl)benzene (TBB), were designed and underwent interfacial alkylation on polyacrylonitrile substrate. The TAD-TBB TFCMs feature high positive charge, and show good repulsion (>90%) to divalent cations. Benefiting from the stability of “C-N-C” bonds in TAD-TBB network, both the permeance (13.7 L m −2 h −1 bar −1 ) and cation rejection (90.3%–91.4%) of the TAD-TBB TFCMs are stable after being immersed in 2 M HCl for 21 days. Meanwhile, the TAD-TBB TFCMs maintained good separation performance (permeance: 13.9 L m −2 h −1 bar −1 , MgCl 2 rejection: 90.5%–92.2%) after a total free chlorine exposure of 96000 ppm h (200 ppm for 480 h). This work reported the preparation of cation-selective membranes stable in harsh environments.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
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2024
·
IF 2.3
Shoujie Du,Liucui Yao,Bin Zhong,Junwei Qin,Songgui He,Youqiang Liu,Zhenqiang Wu
Ethyl lactate is the most abundant ester in semi-solid rice baijiu fermentation, affecting the flavor of baijiu to a great extent. The present study aimed to investigate the spatial distribution and formation contributor of ethyl lactate by removing the microorganisms and extracellular enzymes from the upper, middle, and lower fermentation broth during the later fermentation stage. The removal of suspended substances by centrifugation did not affect the ethyl lactate content in the top and middle fermentation broth containing free cells, enzymes, and starch particles. After day 5 of fermentation, only the lower fermentation broth containing granular cells attached to the starch could continue to accumulate lactic acid, thereby increasing the ethyl lactate content. The results showed that the chemical reactions were the main contributor to the increased ethyl lactate content at the anaphase of fermentation rather than enzymatic catalysis or microbial metabolism. Sequencing of granular cells revealed the main lactic acid producers at different fermentation stages. Lactobacillus helveticus showed the highest abundance of 94.45–95.40% on day 5, which decreased to 29.58–30.20% on day 15, while Lactobacillus acetotolerans showed the highest abundance of 47.93–49.72% at day 15. Additionally, the granular cells were recovered and used for supplementary inoculation in the next batch, which significantly increased the ethyl lactate content. This study provided a novel strategy for improving the ethyl lactate content in semi-solid baijiu fermentation.
研究领域:
食品科学
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微生物学
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生物化学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Cheng Wang,Siqi Huo,Guofeng Ye,Qiu Shi,Zhengping Fang,Hao Wang,Zhitian Liu
To enhance the integrated properties of intumescent fire-resistant coatings (IFRCs) for structural steel, multifunctional phenylboronic acid-decorated zirconium phosphate (ZrP-M) nanosheets were fabricated in this work. The ZrP-M nanosheets featured superior char-forming capacity, flame-retardant effect and hydrophobicity , which simultaneously enhanced the fire resistance, smoke suppression, thermal stability, and water/acid/alkali tolerance of IFRCs. Compared with the unmodified IFRC, the IFRC with 3 wt% ZrP-M (IFRC-4) showed 74.3%, 74.5% and 41.9% reductions in the peak heat release rate (PHRR), total heat release (THR) and total smoke release (TSR). Meanwhile, the IFRC-4 exhibited significantly improved charring capacity and water tolerance, of which the char yield and water contact angle reached 70.9% and 116.9°. The superior fire retardancy and carbonization ability of IFRC-4 enabled it to outperform previous fire-retardant coatings. The introduction of ZrP-M nanosheets also improved the acid and alkali resistance of IFRC. In a fire, the ZrP-M mainly promoted the formation of highly intumescent and compact chars in the condensed phase, thereby strengthening the fire resistance of IFRC. Thus, this work offers an integrated strategy to prepare fire-resistant, smoke-suppressive, thermally-stable and water/acid/alkali-tolerant coatings via introducing versatile ZrP nanosheets, which are expected to find ubiquitous applications in modern construction.
研究领域:
材料科学
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防火技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）