ACS Sustainable Chemistry & Engineering
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2017
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IF 5.951
Quan-Yong Cheng,Xu-Pei An,Yi-Dong Li,Cai-Li Huang,Jian-Bing Zeng
Conventional superhydrophobic materials for oil/water separation were usually prepared from nondegradable and nonrenewable resources, which would not only increase resource crisis but also cause environmental pollution after discarding. In this study, we report a renewable and biodegradable superhydrophobic material, which was fabricated via a two-step curing dip-coating method and was composed of cellulosic filter paper or fabric, cured epoxidized soybean oil (CESO), ZnO, and stearic acid (STA) as the substrate, adhesive, rough structure, and low energy modifier, respectively. The CESO combined ZnO nanoparticles with cellulosic substrate tightly to show excellent stability when suffering from immersing in water and oil for 7 days without losing superhydrophobicity. When the superhydrophobic coating was constructed onto the surface of cellulosic fabric, the material showed high separation efficiency with the values higher than 97% during separation of various oil/water mixtures. The sustainable and biodegradable superhydrophobic material may find potential application in efficient oil/water separation without creating material waste after throwing away.
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REACTIVE & FUNCTIONAL POLYMERS
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2017
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IF 3.151
Yongjie Zhang,Xiaopei Li,Wenbo Wang,Shuwei Wang,Jing Xu,Longquan Xu,Huayi Li
Polysiloxane/polyethylene graft copolymers can synergistically combine the distinguished properties obtained separately in polyethylene (PE) and polysiloxane and therefore attract considerable attentions from both academia and industry. Herein, we introduce a novel and efficient heterofunctional condensation approach to synthesize well-defined polydimethylsiloxane graft PE (PDMS- g -PE) under mild conditions. The chemical structures of PDMS- g -PE are characterized unambiguously, and the correlation between reaction conditions and the structural parameters of PDMS- g -PE is established. Scanning electron microscope images show that the obtained graft copolymer PDMS- g -PE can compatibilize the immiscible PE/silicone oil system.
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 7
·4024-4029
·
IF 3.108
Jianfei Zhou,Teng Xu,Xiaoling Wang,Chang Liu,Xuepin Liao,Xin Huang,Bi Shi
A low-cost and water resistant biomass adhesive, collagen hydrolysate–silane coupling agent hybrids (CSH), was prepared by using collagen hydrolysate (CH) extracted from leather waste as the starting material, and silane coupling agent (SCA) as the crosslinking agent. The as-prepared adhesive was fully characterized by Fourier transform infrared spectroscopy (FTIR), 29Si CP-MAS NMR spectroscopy, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), ANS assay and ninhydrin assay. The as-prepared CSH exhibited pretty good adhesive strength and water resistance. Moreover, the water resistance of CSH can be conveniently tuned by changing the type and dosage of the silane coupling agent. When used as a wood adhesive, the dry adhesive strength of CSH was as high as 1.57 MPa, and the corresponding wet adhesive strength reached 0.95 MPa. Our experimental results suggest that the collagen hydrolysate extracted from leather waste has a great potential to be used as a low-cost and highly effective adhesive in the wood composite industry.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Guoying Liu,Junyue Shan,Lijun Cao,Hangqi Zhao,Ce Sun,Haiyan Tan,Yanhua Zhang
The low strength and high hygroscopicity of natural bamboo limit its use in structural building materials. Herein, lignin and hemicellulose were partially removed from natural bamboo in order to create bamboo frameworks featuring well-aligned bamboo fibers. Subsequently, these bamboo frameworks (BF) are infused with epoxy resin (EP) modified with PDMS and subjected to hot-pressing to fabricate bamboo-epoxy composites (PDMS-EP/BF). The incorporation of flexible PDMS chains facilitated intermolecular chain entanglement, which inhibited crack propagation and improved the bonding between bamboo and EP. The findings of the research indicated that the PDMS-EP/BF composites exhibited a significant enhancement in flexural strength by 98%, modulus of elasticity by 129%, toughness by 399%, and tensile strength by 177% when compared to natural bamboo. Additionally, the modification led to a decrease in the surface energy of the composites, resulting in increased hydrostatic contact angle and imparting water repellency to the material. Compared to natural bamboo, PDMS-EP/BF has 309% higher water contact angle and 143% lower surface energy. In addition, large composites have been prepared and their interface strength was tested. The findings of the study offer insights into the potential enhancement of bamboo composites to achieve increased flexural strength, modulus, and toughness. This could expand the utilization and significance of bamboo in the realm of construction materials.
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JOURNAL OF MATERIALS SCIENCE
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2024
·Vol. 59
·期 31
·14313-14327
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IF 3.5
An Boyuan,Zhang Dongjie,Liu Yuyan,Fan Zhimin,Tan Huifeng,Xie Zhimin
Ti 3 C 2 T x (MXene)-based composites are considered electromagnetic wave absorption (EMA) materials due to their dielectric properties, microstructure, and synergistic interactions with magnetic particles. A better understanding of the effect of the MXene content in composites on the EMA performance is essential for their application, yet it remains unclear. Here, MXene/PU@Fe 3 O 4 (MPF) microspheres with different MXene contents were produced through the incorporation of magnetic particles and multiple electrostatic self-assembly processes. The results show that when the molar ratio of MXene to Fe 3 O 4 is less than 0.5:1, the EMA performance of the MPF microspheres gradually increases with increasing MXene content. MPF microspheres exhibit the best EMA performance when the molar ratio of MXene to Fe 3 O 4 is 0.5:1, with a maximum reflection loss (RL) of 44.0 dB and an effective absorption bandwidth (EAB) of 2.30 GHz. Further increases in this ratio led to an increase in the EAB but a slight reduction in the maximum RL. Additionally, the combination of the same MXene and Fe 3 O 4 nanoparticle ratio had no significant effect on the EMA performance. We expect that this work will enrich the EMA performance research on MXene-based composites.
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JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Zhishuang Han,Xinmeng Lv,Yingge Li,Meihuan Gao,Zhenlin Tang,Xinying Su,Ziyang Zhang,Haidi Li,Jing He,Zaihang Zheng,Yan Liu
Owing to the risk of oil spills in the water pollution and human health, it is urgent to exploit the efficient, simple and low-cost materials to treat oily wastewater. Inspired by the native super-wettability surface of lotus leaves, a green, multi-functionality, multi-response and recyclable superhydrophobic material has been established via an one-step dip-coating method based on waste polyurethane sponges (PU), which is expected to settle the treatment problem of oil/water mixture. And the coating system is mainly constituted by a mixture of silicon resin, nano-Fe 3 O 4 and ultrafine expandable graphene (EG), which can act as lowing low surface energy and fabricating the hierarchical micro-/nano-scaled surface roughness. The water contact angle (WCA) of 156.2 ± 1.4° and water sliding angle (WSA) of 8.0 ± 0.5° have triggered a series of skills in water repellency, self-cleaning and anti-fouling. Most of all, the exceptional oil–water separation capabilities have been achieved that the sorption capacity, separation efficiency and flux for light oil can reach 33.2 g/g, 99.5 % and 31,611 L m -1 h −1 , respectively. Accorded with the intrinsic thermal harvesting ability of Fe 3 O 4 and EG, the excellent photothermal conversion performance has been gained that the temperature of superhydrophobic sponges can reach 68.7 °C in 180 s when the irradiation intensity is 1.2 sunlight, endowing the potential sorption ability of high-viscosity crude oils. Most importantly, the various oil–water separation modes can be also realized that are composed of gravity-driven, magnetism-driven, vacuum-driven and photothermal-driven methods. Except that, the adequate flame retardancy, mechanical durability and chemical stability have been acquired that have raised the high-value-added utilization of modified sponges in fields of environment protection and functional materials.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Xin Gao,Shaoying Shi,Ziqin Ming,Yan Zhang,Ri Qiu,Yibo Ouyang,Jin Zhao,Jie Liu
Copper has extensive industrial applications. However, the susceptibility to corrosion makes it vulnerable in harsh environments. Bioinspired coating presents a novel approach to address copper corrosion. Bioinspired from lotus leaves and pitcher plants, this research endeavors to create superhydrophobic and ferrofluid-infused surfaces (FIS) on copper substrate. Firstly, a one-step electrodeposition method is employed to fabricate superhydrophobic surface on copper. Secondly, Fe 3 O 4 nanoparticles are sequentially modified with dopamine hydrochloride and dodecanethiol to endow surface hydrophobicity. Then, the modified Fe 3 O 4 is dispersed in oil to create a magnetic fluid, which is finally infused onto the superhydrophobic matrix, forming the FIS coating. Electrochemical testing confirms the high protective effect of the bio-inspired superhydrophobic and magnetic fluid composite coating against corrosion. The FIS coating exhibits a prominent low-frequency impedance modulus (7.73 × 10 6 Ω·cm²) even after immersion in NaCl solution for 60 d. Furthermore, the coating demonstrates an outstanding magnetic-driven self-healing capability, as evidenced by the minimal decrease in the |Z| 0.01 Hz value (remaining as high as 10 9 Ω·cm²) even after undergoing six cycles of scratching and self-healing process. This corrosion resistance can be attributed to the combined effects of the accommodating effect of superhydrophobic matrix and the self-healing property of the magnetic fluid under the magnetic field. This dually bio-inspired coating technology offers significant advantages for copper applications in harsh environments.
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Applied Materials Today
·
2024
·
IF 7.2
Zhaohui Dang,Weihua Huang,Xiayu Cai,Jiandong Ye,Weikang Xu
Most bone filler materials currently achieve bone regeneration by mimicking the natural bone extracellular matrix. However, it is difficult for these materials to replicate the structural functions and bioactivities, including immunomodulation, of natural bone perfectly to reduce inflammation and promote bone regeneration synergistically. Repairing bone defects with scaffolds using a decellularised extracellular matrix (dECM) as a matrix material is an important clinical application and research direction. Here, we processed bovine cancellous bone via an optimised combination of decellularisation methods and preferred dECM, which has the shortest processing time and lowest immunogenicity. Hexagonal mesoporous silica (HMS)/poly(lactic-co-glycolic acid) (PLGA) microspheres loaded with bone morphogenetic protein-2 (BMP-2) were prepared using the complex emulsion method. The HMS/PLGA microspheres had longer cytokine release periods than did the separate HMS and PLGA microspheres. Composite BMP-2/HMS/PLGA microspheres were used to prepare dual-loaded cytokine scaffolds with bone immunomodulatory capacity, which were prepared from composite BMP-2/HMS/PLGA microspheres to increase the osteogenic activity of the dECM and to adsorb interleukin-4 (IL-4) on the surface of the scaffolds. The results showed that the dECM had good cytocompatibility and mechanical strength, and the composite microspheres and IL-4 further endowed the dECM with an ordered spatiotemporally controlled release function, which could release BMP-2 for more than 4 months in the long term and release IL-4 for approximately 10 days in the short term. The composite scaffold not only effectively promoted the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) but also immunomodulated the M1 to M2 polarisation of macrophages (MPs) and mediated the M2 polarisation of MPs, which in turn promoted the osteogenic differentiation of BMSCs, creating a favourable immune microenvironment for bone regeneration. In vivo, the dual drug-loaded scaffolds also exhibited good biocompatibility and significantly superior immunomodulatory bone-enhancing properties compared with those of the other groups. In summary, the combination of dECM scaffolds with cytokine-carrying microspheres and immunomodulatory factors can promote the orderly spatiotemporal release of cytokines, which significantly enhances the bone regeneration and repair effects of dECM scaffolds and is a promising bone filler material for clinical application.
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CHEMOSPHERE
·
2024
·
IF 8.1
Hao Sun,Xiaobing Li
In the alkaline-surfactant-polymer flooding emulsion, oil droplets with various sizes exhibited different interfacial properties , resulting in different stabilization and destabilization behaviors. In view of this, it is expected to achieve outstanding oil-water separation efficiency by screening targeted demulsifier for oil droplets with different size ranges (0–1, 1–5 and 5–10 μm). Based on the size effect of oil droplets, a series of multibranched polyether-polyquaternium demulsifiers that integrated different charge neutralization and interfacial displacement functionalities were designed by regulating the cationicity and EO:PO ratios. As a result, the most effective polyether-polyquaternium variant for each size range of oil droplet was screened out. By employing these three selected polyether-polyquaternium variants in a sequential batch demulsification test, the maximum demulsification efficiency of 95.1% was obtained, which was much higher than that using a single polyether-polyquaternium variant (82.5%, 80.5% and 83.8%). The adsorption behaviors of polyether-polyquaternium variants on the oil/water interface were investigated by the molecular dynamics simulation. Moreover, the interfacial properties and oil droplet size variations during the demulsification process were monitored, so as explore the demulsification mechanism. This demulsification protocol based on the size effect of oil droplets with its excellent oil-water separation performance offered significant technical promise for the emulsified oil wastewater disposal.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Mofan Li,Donghai Yang,Hongxu Zhong,Jie Pan,Liangyu Cai,Jiaxu Miao,Haotian Liu,Limin He
The rapid development of shale oil and offshore oil extraction has exacerbated brine contamination in crude oil, presenting challenges for conventional electric dehydration and desalination processes. Electric-magnetic coupling technology emerges as a promising alternative, while its underlying mechanisms and economic viability remain underexplored. In this study, we coupled a stabilized magnetic field with a high-frequency (greater than 1 kHz) pulsed alternating current electric field, enhancing the critical coalescence condition of salty droplets across a concentration range of 8.25 to 18.65 g·L −1 . Molecular dynamics simulations based on oil–water interface reveal that this enhancement is attributed to a reduction in the density and transport rate of surface charge on the droplets, influenced by ion electro enrichment and migration, ultimately allowing the electric field force to be insufficient against the capillary forces driving coalescence. Additionally, emulsion separation experiments show that the electric–magnetic coupling field increased separation efficiency by 33 % compared to the original electric field, achieving a rapid reduction of water content in high-salinity emulsions to 0.5 wt% within 20 min (includes 10 min of synchronized coupled field action). Furthermore, results of the techno-economic calculations based on our developed electric–magnetic coupling separation system indicate that the coupled-field system demonstrated a 8.26 % reduction in total costs due to lower energy consumption, highlighting its economic advantages in lower interest rate and high electricity price scenarios. Our findings provide novel insights into droplet coalescence dynamics and interfacial responses, paving the way for energy-efficient dehydration and desalination of crude oil.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qinglong Zhang,Youwang Hu,Haikuan Chen,Ji’an Duan,Xiaoyan Sun
The sintering of silica nanoparticles (SiNPs) for fused silica glass structural components has garnered significant interest due to its cost-effective and scalable production, as well as potential applications in optics, resonators, and microfluidics. Fabricating thermoplastic nanocomposites (NCs) by combining SiNPs with an organic polymer binder for thermal imprinting using a hard mold, followed by debinding and sintering, represents a promising approach. However, the mechanisms of high-quality cavity filling and the influence of polymer binders on sintering quality remain poorly understood. Here, an improved uniaxial thermal-imprinting technology was developed, utilizing thermoplastic NCs combined with dimethyl silicone oil and hydrophobic SiNPs as mold lubricants. The effects of polyvinyl butyral (PVB) binder's molecular weight and content on sintering performance were systematically investigated. Optimizing these parameters significantly enhanced fused silica glass convex microstructures, achieving a surface roughness Sa = 48.2 nm, visible light transmittance exceeding 90 %, and an aspect ratio of 0.84. This study provides a practical framework for fabricating micropatterned fused silica glass parts with complex shapes, offering potential applications in optics, resonators, microfluidic chips, and beyond.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2017
·
IF 4.784
Xinzhi Wang,Yurong He,Meijie Chen,Yanwei Hu
Direct absorption solar collector (DASC) is a promising technology for solar energy harvesting . Recently, nanofluids have shown great potential for DASC applications due to their tunable optical absorption properties . An advanced composite combining plasmonic gold nanoparticles (Au NPs) and hedgehog-like hierarchically structured ZnO particles (HPs) was prepared and used in DASCs. The nanofluid prepared with 1.0 mg mL −1 HP-Au exhibited excellent stability and broadband optical absorption properties, and reached an equilibrium temperature of ~125 °C within 1 h of solar heating at an irradiation power of 10 kW m −2 . A new photothermal conversion efficiency model was established to evaluate the solar harvesting performance of the HP-Au/oil nanofluid by simultaneously considering the effect of the working fluid temperature on the heating and cooling efficiencies. Compared to the base fluid, the HP-Au/oil nanofluid exhibits a 240% enhancement in photothermal conversion efficiency. The HP-Au/oil nanofluid shows great potential as a working fluid in direct absorption solar collectors.
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