JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2016
·
IF 3.782
Innocent O. Arukalam,Emeka E. Oguzie,Ying Li
Perfluorodecyltrichlorosilane-based poly(dimethylsiloxane)-ZnO (FDTS-based PDMS-ZnO) nanocomposite coating with anti-corrosion and anti-fouling capabilities has been prepared using a one-step fabrication technique. XPS analysis and contact angle measurements showed the fluorine content to increase, while the hydrophobicity of the coatings decreased with addition of FDTS. XRD analysis revealed existence of ZnO nanoparticles of dimensions ranging from 11.45 to 93.01 nm on the surface of coatings, with the mean particle size decreasing with FDTS addition, and was confirmed by SEM and TEM observations. Interestingly, the anti-corrosion performance and mechanical properties of the coatings increased remarkably on addition of FDTS. Indeed, the observed low adhesion strength , surface energies and the outstanding anti-corrosive properties imply that the obtained coating would be useful in anti-fouling applications.
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高影响因子
Polymers
·
2024
·Vol. 16
·期 11
·1491
·
IF 4.7
Hongyi Zhu,Shunxia Wu,Rui Tang,Yang Li,Gang Chen,Bingxue Huang,Biyou Peng
Electronic devices play an increasingly vital role in modern society, and heat accumulation is a major concern during device development, which causes strong market demand for thermal conductivity materials and components. In this paper, a novel thermal conductive material consisting of polydimethylsiloxane (PDMS) and a binary filler system of h-BN platelets and Al2O3nanoparticles was successfully fabricated using direct ink writing (DIW) 3D printing technology. The addictive manufacturing process not only endows the DIW-printed composites with various geometries but also promotes the construction of a 3D structural thermal conductive network through the shearing force during the printing process. Moreover, the integrity of the thermal conductive network can be optimized by filling the gaps between the BN platelets with Al2O3particles. Resultingly, the configuration of the binary fillers is arranged by the shearing force during the DIW process, fabricating the thermal conductive network of oriented fillers. The DIW-printed BN/Al2O3/PDMS with 45 wt% thermal conductive binary filler can reach a thermal conductivity of 0.98 W/(m·K), higher than the 0.62 W/(m·K) of the control sample. In this study, a novel strategy for the thermal conductive performance improvement of composites based on DIW technology is successfully verified, paving a new way for thermal management.
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REACTIVE & FUNCTIONAL POLYMERS
·
2018
·
IF 2.975
Yufeng Lei,Shengwen Zhou,Chenyun Dong,Anqiang Zhang,Yaling Lin
Quaternary ammonium salts are widely used as epidermal and topical antimicrobial agents in medical treatments due to their broad activity, excellent performance and ready availability. However, their epidermal application has revealed many noticeable disadvantages, including short-term functionality, environmental toxicity, rapid antimicrobial resistance and skin penetration. Here, a series of tri-block copolymers grafted with dimethylaminopropyl benzyl chloride and based on a polydimethylsiloxane (PDMS) backbone, referred to as PDMS- b -(PDMS- g -BC)- g -PDMS, were prepared with well-controlled chain length and cationic grafting content. The quaternary ammonium salt-containing polymers were effective antimicrobial agents against epidermal pathogenic microbes, such as E. coli , S. albus and C. albicans . By incorporating hydrophilic and antimicrobial quaternary ammonium salt groups into the hydrophobic PDMS backbones, the amphiphilic tri-block copolymers were water-soluble but capable of assembling onto different surfaces, driven by electrostatic attraction or hydrophobic repulsion, which yielded long-term functionality on the surface. Moreover, the enlarged molecular size prevented penetration though full-thickness rat skins. These findings suggest a promising application of polymeric quaternary ammonium salts with hydrophobic moieties as epidermal antimicrobial agents.
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NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Jianying Huang,Ling Xia,Xiaohua Xiao,Gongke Li
A copper/polydimethylsiloxane (Cu/PDMS) microfluidic chip was designed to synthesize SERS substrates through a displacement reaction between silver and copper in microfluidic channels to form a microfluidic SERS nanoparticles (AgNPs)/Cu chip. This SERS substrate fabrication method doesn’t require complex manufacturing processes or expensive equipment, and it can be achieved at room temperature in just 4 min. Meanwhile, the AgNPs grown on copper foil could offer ample hot spots, effectively boosting Raman signals of target molecules, and the enhancement factor (EF) was 5.12 × 107 for methylene blue, 4.08 × 107 for crystal violet, and 4.81 × 105 for sulfadiazine. The chip could be reused at least 9 times with consistent signal performance. Combined with the concentration gradient microchannel network design, we could establish the standard curve for samples through one injection on a single chip. A rapid SERS method for detecting sulfadiazine in aquatic products was developed. The linear range for sulfadiazine analysis was 75.0–1000 μg L−1 with a limit of detection of 28.4 μg L−1. Sulfadiazine was found in aquatic products (43.8 μg kg−1), with recovery rates ranging from 82.7% to 110%. The result was validated using high-performance liquid chromatography, showing a relative error of 9.3%. The entire detection procedure could be completed in just 20 min to detect sulfadiazine. These results demonstrate that the developed SERS method is fast, accurate, and reliable for analysis of sulfadiazine in aquatic products.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 10
·1-10
·
IF 5.3
Peng Sasa,Zhang Zhilong,Xin Mingwei,Liu Dongli
An innovative method is introduced based on the combination of label-free surface-enhanced Raman scattering with advanced multivariate analysis. This technique allows both quantitative and qualitative assessment of Salmonella typhimurium and Escherichia coli on eggshells. Using silver nanocubes embedded in polydimethylsiloxane, we consistently achieved Raman spectra of bacteria. The stability of the Ag NCs@PDMS substrate is confirmed using rhodamine 6G over 30 days under standard conditions. Principal component analysis (PCA) effectively distinguishes between S. typhimurium and E. coli spectra. Partial least squares regression (PLS) models were developed for quantitative determination of bacteria on egg surfaces, yielding accurate results with minimal error. The S. typhimurium model achieves R c 2 = 0.9563 and RMSEC = 0.601 in calibration, and R v 2 = 0.9113 and RMSEV = 0.907 in validation. Similarly, the E. coli model achieves R c 2 = 0.9877 and RMSEC = 0.322 in calibration, and R v 2 = 0.9606 and RMSEV = 0.579 in validation. Recoveries validate PLS predictions by inoculating egg surfaces with varying bacterial amounts. Our study demonstrates the feasibility of SERS-PLS for quantitative determination of S. typhimurium and E. coli on eggshells, promising enhanced food safety protocols. Graphical Abstract
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yingying Wang,Taipeng Jiang,Shangmin Si,Jian Wu,Lan He,Weijie Wei,Lingling Zeng,Sheng Chen,Meng Li,Zhuwei Gao
Photothermal materials have attracted considerable attention for efficient solar energy conversion. A promising strategy involves leveraging the photothermal effect to reduce crude oil viscosity, thereby facilitating efficient oil–water separation. In this study, we reported the in-situ polymerization of covalent organic framework (COF) layers on cotton wool (CW). Subsequently, polydopamine (PDA) and polydimethylsiloxane (PDMS) were sequentially coated to obtain a novel sandwich-structured composite (PDMS@PDA@COF@CW). The composite exhibited excellent superhydrophobic properties with a water contact angle of 153.5°. Furthermore, it maintained an oil–water separation efficiency of 98.1 % even after 50 consecutive cycles. The material also demonstrated remarkable chemical stability under various harsh environmental conditions and possessed excellent flame retardancy. Critically, the synergistic interaction between the PDA coating and the COF framework significantly enhanced photothermal performance. Consequently, the surface temperature of PDMS@PDA@COF@CW rapidly reached 83.8 °C within 180 s under 1.0 kW/m 2 light irradiation. This study presents a highly promising solution for mitigating crude oil spills, offering valuable insights into the design of multifunctional materials for environmental remediation.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Wang Shuli,Lu Jihan,Yang Yuanyuan,Yao Jing,Li Zhuo
Effectively separating wide types oil-water mixtures from immiscible to emulsions and in-situ recovering viscous crude oil is an urgent issue in alleviating water pollution and recycling oils. We developed a composite sponge of Cu-HHTP/Fe/PDMS@sponge with superhydrophobicity, excellent photothermal conversion ability and stability for multi-type oils separation from water environments. For light oil-water mixtures, the sponge showed super separation efficiency up to 99.95 % and reusability in the long-term; for oil-in-water emulsion, the separation efficiency was as high as 99.49 %; for recovery of viscous crude oil from water, the absorption capacity of the sponge reached 70 g/g and the continuous absorption rate was up to 6.56 g/min. After soaked in harsh chemical solutions and 500-cycle compression, the sponge still exhibited excellent flexibility and recoverability in viscous oil. The excellent performances of the multifunctional sponge were due to the construction of micro/nano-scale hierarchical structures by PDA and Cu-HHTP, protected with PDMS coating to improve both the hydrophobicity and stability. The introduction of Fe 3 O 4 with Cu-HHTP strengthened the photothermal conversion efficiency with the sponge surface temperature rapidly increased from room temperature to 102.4 °C under simulated sunlight exposure (1 kW/m 2 ), and resulted in the sponge can be remote-controlled magnetically. This simultaneous, fast and continuous oil-water separation and adsorption processes can be readily and widely applied for oily water purification and oil-spill cleanup.
研究领域:
环境科学
·
材料工程
·
化学工程
·
纳米技术
·
能源回收
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 44
·2404439
·
IF 18.5
Sheng Zhang,Xiuxia Yang,Jianqiang Xiao,Xin Li,Qingpeng Peng,Siyuan Luo,Huaiqiang Ba,Yu Zhang,Xuhui Xu
Mechanoluminescence (ML) with the unique mechanical-to-optical energy conversion attracts wide attention for stress sensing. However, the development of ML materials is primarily based on crystalline material due to the crystal structure can provide an appropriate crystal field environment for emission center, which limits the expansion of ML materials and affects the deeper understanding of ML mechanism. Herein, the tunable full-color ML can be achieved in transparent amorphous glass system. The rare earth-doped transparent amorphous glass can produce ML under stress stimulations when in direct contact with polydimethylsiloxane (PDMS) or mixed with PDMS to prepare the ML elastomers. Based on the excellent ML performance of amorphous glass, an advanced device regarding the visualized detection of automotive brake tribo-force has been developed. The findings provide profound insights into the triboelectric potential induced ML phenomenon, which offers the guiding significance in the mechanics-related visualized detection and the design of multi-color ML materials in the future.
研究领域:
材料科学
·
光学
·
力学
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智能材料
·
传感器
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CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Qinghua Zhang,Jingxian Jiang,Fan Gao,Guangfa Zhang,Xiaoli Zhan,Fengqiu Chen
In this work, an original amphiphilic copolymer P(PEG-PDMS-KH570) combined with SiO 2 nanoparticles (SiO 2 NPs) was utilized to prepare polyether sulfone (PES) nanocomposite ultrafiltration (UF) membrane with enhanced antifouling performance. The enrichment of the organic-inorganic modifier P(PEG-PDMS-KH570)@SiO 2 were realized at the same time as the formation of PES UF membrane via sol-gel non-solvent induced phase separation (NIPS) process. The interaction between the copolymer P(PEG-PDMS-KH570) and SiO 2 NPs furnished a stable and effective antifouling PES UF membrane. Surface morphology, chemical composition characterization and wetting property measurements confirmed the segregation and distribution of the nanocomposite modifier. The multi-defense mechanism from fouling resistance to fouling release of the nanocomposite membranes was investigated by setting bovine serum albumin (BSA) aqueous solution as a model foulant. The antifouling properties of the modified membranes, especially for the PES/T@SiO 2 ∼4% membrane, were effectively improved. The flux decline rate of PES/T@SiO 2 ∼4% membrane was as low as 15.6%, and the flux recover ratio was up to 99.0%. Moreover, the modified membranes also possessed remarkable antifouling stability. Results of this work provide a facile method to construct a hierarchical and heterogeneous membrane surface that could achieve the multi-defense mechanism in efficient water treatment.
研究领域:
材料科学
·
环境工程
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Haoxia Guo,Zhenming Chu,Luming Fu,Yongming Lv,Xiaoman Liu,Xiaoxing Fan,Wei Zhang
Flexible strain sensors have garnered considerable attention in the domains of health monitoring, human–machine interaction, and electronic skin due to their exceptional stretchability, flexibility, skin conformability, and superior sensing capabilities. Despite recent advances, developing high-performance strain sensors that combine high sensitivity, a wide strain range, and robust stability remains a significant challenge. To overcome this, we have innovatively developed a polydimethylsiloxane (PDMS)/MXene/reduced graphene oxide (rGO) strain sensor using a tilt-filtration method and a pre-stretching technique. This sensor features a novel gradient micro-wrinkle structure, induced by variations in thickness, which enhances its strain sensing capabilities and imparts superhydrophobic properties. The synergistic interaction between the materials and the microstructure enables the sensor to achieve a high sensitivity (gauge factor (GF) peaking at 136,124.40), a wide strain range (up to 300%), and excellent stability (up to 10,500 cycles at 10% strain). Capable of detecting a wide array of human body movements, from large-scale motions to subtle stimuli, this strain sensor also boasts a rough surface texture and low surface energy, conferring superhydrophobicity and corrosion resistance . These features make it suitable for use in harsh environments. The gradient micro-wrinkle strain sensors hold promising potential for practical applications in health monitoring, electronic skin, and human–machine interaction.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Tian-Li Wang,Wen-Hao Geng,Yue-Xin Wang,Yong-Qing Cheng,Chu-Dan Wang,Jin-Ming Song,Jing Song,Di Zhang,Qingxia Zhu,Hong-Zhang Geng
In this study, polydimethylsiloxane (PDMS), polydopamine (PDA)-modified graphene nanosheets (PDA@GN), and amino-functionalized multi-walled carbon nanotubes (MWCNT-NH 2 ) were employed as the flexible substrate and conductive layers. A three-dimensional (3D) MWCNT-NH 2 /P@GNs/PDMS flexible strain sensor was fabricated via a straightforward template-transfer approach in conjunction with an economical solution-spraying technique. Firstly, during the preparation process, graphene was modified with dopamine hydrochloride. In combination with MWCNT-NH 2 , a synergistic effect was formed, which helped construct an efficient conductive network and consequently improved the charge transfer efficiency of the membrane film. Subsequently, a 3D structured film was fabricated using a mold to further enhance its conductivity. The 3D structured MWCNT-NH 2 /P@GNs/PDMS strain sensor demonstrated remarkable sensitivity gauge factor (GF) of 1.07 (0% < ε < 40%), 2.53 (40% < ε < 80%), and 4.06 (80% < ε < 120%). Additionally, the film demonstrated outstanding stability and durability over 1000 s, as well as stable strain-sensing performance. The resulting film possessed distinctive properties, such as high tensile strain (up to ∼ 120%), outstanding toughness (tensile strength of about 0.60 MPa), and high sensitivity (GF = 4.06). Furthermore, the film exhibited excellent thermal conductivity due to its enhanced electrical conductivity, reaching a temperature of approximately 163.5 ℃ at 24 V. Finally, the 3D structured MWCNT-NH 2 /P@GNs/PDMS strain sensor demonstrated increased sensitivity in detecting electrical signals from different human motions. These advantages allow the sensor to maintain stability and repeatability under strain, giving it broad application prospects in electronic skin, wearable electronics, and health monitoring.
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Crystals
·
2026
·Vol. 16
·期 2
·132
·
IF 2.9
Bo Li,Jiao Sun,Yuxing Lei,Tingting Jiang,Haitao Yang
Flexible dielectric composite materials capable of converting power frequency electric fields into measurable electrical signals are of great significance in the field of non-contact electric field sensing in power systems. In this paper, graphene/nitride heterojunction powders were prepared using three representative nitrides (AlN, BN, and Si3N4) and embedded in polydimethylsiloxane (PDMS) to prepare flexible composite films with a fixed filler content of 5.0 wt%. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) confirmed the successful formation of the heterojunctions. The results showed that the nitride-related elements (Al, Si and N) were spatially correlated with the graphene-rich regions, thus providing abundant interfacial contact sites. Dielectric spectroscopy (50 Hz–50 kHz) showed that all samples exhibited typical dispersive behavior, with the real part of the dielectric constant decreasing monotonically with increasing frequency, and the loss tangent also decreasing smoothly. Under a 50 Hz parallel-plate electric field, the normalized induced voltage amplitude (PDMS = 1) increases to 1.070 (≈7.0%) for G/PDMS, and further to 1.0723–1.07447 (≈7.23–7.45%) for AlN–G/PDMS, BN–G/PDMS, and Si3N4-G/PDMS. DFT calculations confirm that the graphene/nitride interface has a stable structure with negative binding energies (−2.241, −1.773, and −3.062 eV for AlN–G, BN–G, and Si3N4–G, respectively). Significant charge redistribution and Mulliken charge transfer (0.0538, 0.2047, and 0.0244 eV, respectively) are present at the interface, accompanied by Fermi level density of states modulation and a small bandgap opening (~0.101 eV) in BN–G. These results collectively support the interfacial polarization-driven mechanism and provide a comparative basis for selecting nitride components in graphene-based heterojunction fillers in flexible dielectric electric field-sensing layers.
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