JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Wei Li,Yin He,Jie Xu,Wen-yu Wang,Zheng-tao Zhu,Hao Liu
The silver nanowires (Ag NWs) prepared by improved polyol method in 30min were applied to the stretchable strain sensors. Three factors affecting the morphology of Ag NWs were discussed, including reaction temperature, molecular weight of PVP, ratio of silver nitrate (AgNO 3 ) and polyvinyl pyrrolidone (PVP). Experimental results showed that Ag NWs with diameter of 53 ± 9 nm, length of 31 ± 7 μm and the aspect ratio is 584.9 were obtained under the optimum conditions. Thus, a new and convenient method was proposed to fabricate flexible stretchable sensors by embed Ag NWs into Polydimethylsiloxane (PDMS). The stability, hysteresis, and sensitivity of the Ag NWs@PDMS strain sensors were evaluated by cyclic stretch-release test. Our strain sensor with good stability, higher sensitivity (the gauge factor is 4.11) and good repeatability could be stretched 10% continuously for about 200 cycles. Ag NWs@PDMS flexible sensors can be used in wearable devices to monitor human movements.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2016
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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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Polymers
·
2024
·Vol. 16
·期 11
·1491
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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
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2018
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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
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2024
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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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DESALINATION
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2025
·
IF 9.8
Sehria Zia,Muhammad Kashif,Haojie Ge,Kaiyu Zhao,Yafei Guo,Tianlong Deng
This study investigates the synthesis, characterization and adsorption efficiency of PDMS@Li/ZnAl-LDH as a potential adsorbent for lithium recovery from Salt Lake brine with a high Mg/Li ratio. Synthesized via co-precipitation, the adsorbent exhibited excellent stability across a wide range of pH and temperature, along with a well-defined layered crystalline structure. The maximum adsorption capacity of Li + is 14.1 mg/g in lithium brine and 9.4 mg/g in the Qarhan Salt Lake's brine with impressive selectivity, as indicated by separation factors of 215, 838 and 175 for Li + /K + , Li + /Na + and Li + /Mg 2+ , respectively. Microspheres formed by Li/ZnAl-LDH in ultra-pure water exhibited tunable pore size and porosity as compared to Li/Al-LDH, which enhanced the Li + adsorption. Cyclic adsorption and zinc dissolution tests confirmed the adsorbent's excellent reusability with no significant structural degradation. Furthermore, using NaAlO 2 as a precursor reduces cost, making Li/ZnAl-LDH a viable option for large-scale lithium recovery. This work presents a sustainable, cost-effective strategy for lithium recovery with potential industrial applications.
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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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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Guangmeng Chen,Ming Mu,Wenjie Yu,Li Jia,Ziqiang Hu,Weiwei Zhao,Xiaoqing Liu
Flexible sensors in practical applications require them to show sufficiently high sensitivity over wide sensing ranges, however, there always exists a trade-off. Herein, we address the aforementioned challenging through the geometric innovation of laser-induced graphene (LIG) conductive paths. A liquid benzoxazine (PGE-fa) precursor is developed to enable the in-situ LIG fabrication on PDMS substrates, eliminating the conventional transfer-induced defects. Furthermore, a dual architecture integrating straight and serpentine LIG patterns in parallel synergistically resolves the sensitivity-range paradox, where the straight segments bear high sensitivity (GF = 68.98 at 1% strain) for micro-strain detection (0.05–10%), while the serpentine components maintain conductivity for large-strain tolerance (up to 30%). It is revealed that the cracks appear in straight LIG line under small deformations, resulting in resistance change to guarantee high sensitivity, whereas the serpentine LIG line can dissipate stress through in-plane bending and rotational deformation, and therefore, contribute to the conductive path to accommodate broad strain range. In addition, the sensor exhibits exceptional performance of rapid response/recovery (180/200 ms), ultralow detection limit (0.05% strain), and 5,000-cycle durability. Experimental validations in pulse waveform analysis, blink detection, joint motion monitoring, and Morse code-based human-machine communication collectively demonstrate the sensor's versatility across diverse physiological and biomechanical sensing scenarios. It is believed that the intelligent structural design in this work is attractive for the development of high-performance wearable systems in personalized healthcare.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yanze Liu,Hai Zhong,Biao Zhao,Youping Wu,Jianping Deng
Circularly polarized luminescence (CPL) has emerged as a critical technology for anticounterfeiting and optical display applications due to its unique chiroptical properties. We report a multicolor CPL-emitting elastomeric film (P37/PSK@SiO2-PDMS) that synergistically combines chiral helical polyacetylene (P37) and a surface-engineered perovskite (PSK@SiO2) through hydrogen-bond-directed assembly. Confinement within the PDMS matrix drives P37 to self-assemble into a chiral supramolecular structure through hydrogen bonding, inducing a chiroptical inversion. Simultaneously, surface modification of PSK@SiO2 enhances its compatibility with PDMS while enabling efficient chirality and energy transfer from P37 via interfacial hydrogen bonds. The resulting material exhibits exceptional CPL performance, achieving a maximum dissymmetry factor of 4.3 × 10–2 and a high photoluminescence quantum yield up to 67%. The PDMS matrix not only stabilizes the PSK components but also enables reversible, strain-tunable CPL modulation through its elastomeric properties. This work establishes a hydrogen-bonding paradigm for designing high-performance chiral PSK materials, while demonstrating their potential for dynamic photonic applications.
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ACS Applied Electronic Materials
·
2025
·
IF 4.7
Kun Zhao,Jiahao Zhou,Zongqiang Gao,Jiabei Zhang,Yuan Ye,Junhui Wu,Yong Ding,Bin Zhang
Triboelectric nanogenerators (TENGs) hold significant potential for a wide range of applications such as harvesting small mechanical energy and enabling self-powered sensing technologies. However, their broader implementation is hindered by limited output performance and a short operational lifespan. This work tackles these challenges by developing a composite film with high charge density and enhanced wear resistance, consisting of molybdenum disulfide (MoS2) nanosheets and polydimethylsiloxane (PDMS). The 3 wt % MoS2/PDMS composite film exhibited an 8.8% reduction in friction coefficient compared to pure PDMS. In tribological testing, the composite film showed a significant increase in the number of linear cycles by 146.6% compared to pure PDMS. Under a contact pressure of 8.2 N and an operating frequency of 1.96 Hz, the two-electrode contact-separation mode TENG demonstrated remarkable peak performance metrics: an open-circuit voltage (Voc) of 410 V, a short-circuit current (Isc) of 42 μA, and a short-circuit transferred charge (Qsc) of 76 nC, representing improvements of 2.05, 2.1, and 2.17 times, respectively, compared to a pure PDMS-based TENG. When integrated with a transformer–rectification circuit, the TENG achieved a peak power output of 2.8 mW, sufficient to continuously power capacitors and light up 66 white LEDs. Notably, the TENG maintained stable output performance even after enduring 10,000 operational cycles. An arched TENG design was also created to detect the motion state of the human body. This research offers critical insights and advancements in the design of innovative triboelectric materials for TENG applications, paving the way for enhanced output performance and durability in self-powered systems.
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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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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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