SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2023
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IF 4.4
Xiaojian Li,Lijun Li,Yangzhi Wang,Xuehui Hao,Changzheng Wang,Zhenshan Yang,Hefu Li
The large-area fabrication of flexible and transparent surface-enhanced Raman scattering (SERS) substrates with high performance by a facile and efficient method is still challenging. Here, we demonstrated a large-scale, flexible and transparent SERS substrate composed of PDMS nanoripple array film decorated with silver nanoparticles (Ag NPs@PDMS-NR array film) prepared by a combination of plasma treatment and magnetron sputtering. The performances of SERS substrates were characterized by rhodamine 6G (R6G) using a handheld Raman spectrometer. The optimal Ag NPs@PDMS-NR array film exhibited high SERS sensitivity, with a detection limitation of R6G reaching 8.20 × 10 −8 M as well as excellent uniformity (RSD = 6.8%) and batch-to-batch reproducibility (RSD = 2.3%). In addition, the substrate showed outstanding mechanical stability and good SERS enhancement by backside illumination, thus it was suitable for in situ SERS detection on curved surfaces. The detection limit of malachite green on apple and tomato peels was 1.19 × 10 −7 and 1.16 × 10 −7 M, respectively, and quantitative analysis of pesticide residues could be realized. These results demonstrate that the Ag NPs@PDMS-NR array film has great practical potential in rapid in situ detection of pollutants.
研究领域:
材料科学
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分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2013
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IF 0.807
Shi-Ping Zhan,Xing Huang,Qi-Cheng Zhao,Li Chen,Wei-Min Hou,Song Zhang,Jin-Jun Deng
Dispersion polymerization of lactides and lactones has been studied and has received a great deal of attention used to prepare biodegradable polymers in supercritical carbon dioxide (ScCO2). The triblock copolymers of poly(ϵ-caprolactone) PCL-polydimethylsiloxane (PDMS)-poly(ϵ-caprolactone) PCL by the feed ratio of 1:2:1 and 1:3:1, respectively were synthesized to be used as the stabilizers in the dispersion polymerization of L-lactide. The fine poly(L-lactide) (PLLA) powders were obtained at the concentrations of 3% to 5%w/w (stabilizer/monomer). The results demonstrated that the triblock copolymers were the effective stabilizers for the dispersion polymerization of L-lactide. It was also found that the cooling process had a significant effect on the particle size of the fine powders. In order to obtain the best PLLA powders, it would be necessary to use the cooling process with stirring.
研究领域:
高分子科学
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化学工程
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材料科学
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绿色化学
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DOI
高影响因子
Materials Today Communications
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2025
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IF 4.5
Luyao Luo,Bin Zhang,Yanzi Lei,Dawei Chai,Danling Zhang,Kuang Xu,Niandi Chen,Shiyu Hu,Hui-Ling Peng,Hai Wang
PDMS-CNTs composite-based TENGs exhibit promising potential in mechanical energy harvesting due to their flexibility and processing versatility; however, the inherent limitations of PDMS and poor dispersion of CNTs severely restrict their performance. Despite various modification strategies, existing approaches often compromise material properties, making it crucial to develop effective solutions for high-performance TENG devices. Herein, we introduce an innovative approach to fabricate high-performance TENGs based on porous polydimethylsiloxane/multi-walled carbon nanotubes/hydroxypropyl cellulose (PDMS-MWCNTs/HPC) composites through a unique "sponge pump absorption" method. Using HPC as a molecular bridge enables stable MWCNTs dispersion and uniform deposition within porous PDMS framework. The resultant composite foam exhibits exceptional mechanical resilience with 99 % recovery after 60 % compression and enhanced electrical output, achieving peak voltage and current of 149.09 V and 262.72 nA at 87 % porosity under 40 N force. The hierarchical porous structure, formed by unfiltered NaCl templates, significantly enhances surface charge density and charge transfer efficiency, while maintaining essential dielectric properties through HPC incorporation. The device demonstrates reliable performance in powering LEDs and exhibits distinct electrical responses to various mechanical deformations including stretching, twisting, and bending. This strategy presents an effective approach for fabricating high-performance TENG devices with great potential in self-powered sensing and sustainable energy harvesting applications.
研究领域:
材料科学
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能源技术
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纳米科技
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产品关联
DOI
高影响因子
AICHE JOURNAL
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2023
·Vol. 69
·期 9
·e18120
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IF 3.7
Wei-Min Liu,Heng Mao,Yu-Jie Wang,Shen-Hui Li,Ying-Nan Feng,Li-Hao Xu,Sen Wang,Chan Pei,Zhi-Ping Zhao
The construction of high-performance MOF-based hollow fiber composite membrane (HFCM) modules is a significant, yet challenging task for the biofuel production industry. In this study, a novel approach was taken to fabricate PDMS@ZIF-8/PVDF HFCMs in modules through a facile ZIF-8 self-crystallization synthesis followed by pressure-assisted PDMS infusion for pervaporation ethanol-water separation. The as-prepared HFCMs exhibited an ultrathin separation layer (thickness, 370 ± 35 nm), which was achieved through precise regulation of the ZIF-8 membrane and defect repair by PDMS infusion. Moreover, the strategy utilized in this study resolved the defect issues arising from MOF agglomeration in conventional composite membranes. Impressively, at the optimal packing density, the prepared membrane demonstrated a remarkable ethanol flux (1.11 kg m −2 h −1 ) with an PSI value (26.59 kg m −2 h −1 ) and showed promising long-term stability for the pervaporation of 5 wt% ethanol aqueous solution at 40°C.
研究领域:
材料科学
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化学工程
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生物燃料生产
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Yan Zhang,Fule Ren,Yujian Liu
The superhydrophobic coatings with high gamma radiation stability were prepared by using epoxy/polydimethylsiloxane (EP/PDMS) resins as the matrix and silica nanoparticles as the fillers. The nanocomposite coatings exhibit superhydrophobicity with a high water contact angle (WCA) of 154° and a low sliding angle of 7°. With the amount of SiO 2 increasing from 0 to 30%, the surface shows the hierarchically structure gradually and its roughness raised from 4 nm to 278 nm. And little change in the WCA of the coatings (from 155° to 149°) was observed when the pH of the droplets varied from 2 to 14. In addition, the coatings also show good adhesion grade (5B), high hardness (6H) and outstanding stability for high dose gamma radiation.
研究领域:
材料科学
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纳米技术
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辐射物理学
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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
Kaiming Zhang,Jiawen Sun,Jingyao Song,Chuanhui Gao,Zhe Wang,Chengxin Song,Yumin Wu,Yuetao Liu
Flexible conductive composites can be used as wearable strain sensors, which are widely used in the fields of new-generation robotics, electronic skin, and human detection. However, how to make conductive composites that simultaneously possess flexibility, stretchability, self-healing, and sensing capability is challenging research. In this work, we innovatively designed and prepared a silicone polymer conductive composite. MXenes and amino poly(dimethylsiloxane) were modified by small biomolecules via an esterification reaction and a Schiff base reaction, respectively. The modified MXenes are uniformly dispersed, which endows the composite with good electrical conductivity. The reversibility of multiple hydrogen bonds and imine bonds in the composite system makes it have ideal tensile properties and high-efficiency self-healing ability without external stimulation. The conductive composite containing 10 wt % A-MXenes showed an elongation of 81%, and its mechanical strength could reach 1.81 MPa. After repair, the tensile properties and the electrical conductivity could be restored to 98.4 and 97.6%, respectively. In addition, the conductive composite is further evaluated for the value of wearable strain sensors. Even after cut-healed processes, the conductive composite can still accurately detect tiny human movements (including speaking, swallowing, and pressing). This kind of self-healing MXene/PDMS elastomers based on the modification of small biomolecules has great potential as wearable strain sensors. This simple preparation method provides guidance for future multifunctional flexible electronic materials.
研究领域:
材料科学
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纳米技术
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可穿戴技术
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电子皮肤
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机器人技术
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2024
·
IF 8.3
Jianan Song,Guangxing Huang,Feng Wei,Jiajia Meng,Kan Zhang
The increasing demand for high-performance strain sensors has driven the development of innovative composite systems. This study focused on enhancing the performance of composites by integrating liquid metal, carbon nanotubes, and polydimethylsiloxane (PDMS) in an innovative approach that involved advanced interface engineering, filler synergy, and in situ cross-linking of PDMS in solution. Surface modification of liquid metal with allyl disulfide and hydrogen-containing polydimethylsiloxane significantly improved its stability and dispersion within the polymer matrix. Through in situ cross-linking in solution and subsequent segment rearrangement after solvent evaporation, a continuous filler network was formed within the composite. The composites exhibited enhanced thermal stability, achieving a thermal conductivity of up to 2.13 W/(m·K) while simultaneously attaining a high electrical conductivity of 416 S/cm. The composite demonstrated excellent thermal management capabilities, alongside remarkable mechanical properties, including over 400% elongation at break and a low modulus of 0.587 MPa, even at high filler content. These attributes make the composite highly suitable for flexible strain sensor applications. Notably, the composite demonstrated outstanding strain sensing capabilities, effectively monitoring both human motion and handwriting. This work highlighted the critical roles of interface modification, filler interactions, and in situ cross-linking in achieving significant improvements in thermal, electrical, and sensing performance, thereby advancing the potential applications of flexible electronic materials.
研究领域:
材料科学
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电子工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Yuanyuan Rao,Fang Ni,Yun Sun,Benwei Zhu,Zhi Zhou,Zhong Yao
Uniform zeolitic imidazolate framework (ZIF-8) nanoparticles were synthesized then dispersed into a rubbery polydimethylsiloxane (PDMS) matrix to prepare ZIF-8/PDMS hybrid membranes. The performance of the ZIF-8/PDMS hybrid membrane was evaluated in ethanol-water and aromatic-water model systems. The ZIF-8/PDMS hybrid membranes, loaded with 6 wt% of the nanoparticles, separated of ethanol and the characteristic compounds in blackberry juice, linalool, benzaldehyde and ethyl acetate more effectively than a pure PDMS membrane. Based on these results, a ZIF-8/PDMS hybrid membrane was used to separate the volatile aromatic compounds (VACs) from natural blackberry juice. The total volatile aromatic compounds in the blackberry juice decreased significantly after pervaporation treatment. The recovery of linalool, benzaldehyde and ethyl acetate at 50 °C were 93.8%, 92.1% and 75.2%, confirming the high performance of ZIF-8/PDMS hybrid membrane.
研究领域:
化学工程
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材料科学
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食品科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Zhenfan Wu,Jing Chen,Zezhi Chen,Huijuan Gong,Xiaofeng Guo,Lu Chen
Membrane separation, a green and efficient gas purification method, has been underexplored for removing volatile methyl siloxanes (VMS) from biogas. This study investigates the feasibility of removing VMS from biogas through polydimethylsiloxane (PDMS) membranes. Permeation tests revealed that PDMS membranes exhibit exceptional permeability to D4 (octamethylcyclotetrasiloxane, a representative VMS compound), with a permeance of 1492.37 GPU, significantly higher than for CH 4 and CO 2 . The selectivity values for D4/CH 4 and CO 2 /CH 4 were 75.26 and 9.80, respectively, demonstrating the membrane’s dual potential for D4 removal and CH 4 recovery. The permeation mechanism of D4 in PDMS was elucidated using density functional theory (DFT) calculations and molecular dynamics (MD) simulations. The results revealed that D4 permeation in PDMS is driven by favorable solubility compatibility, with dissolution being the rate-limiting step. Furthermore, the 40-hour continuous permeation test demonstrated the long-term stability of the PDMS membrane. Process simulation using PRO II software evaluated the engineering application of PDMS membranes for biogas purification, identifying a trade-off between maximizing D4 removal and minimizing CH 4 loss. To address this challenge, an optimized strategy was proposed through PDMS layer thickening. By increasing the thickness of the PDMS layer from 3.32 μm to 15.27 μm, the selectivity of the PDMS membrane for D4/CH 4 was enhanced. PRO II simulation results demonstrated that the thickened membrane could reduce the D4 concentration in simulated biogas from 50 mg/m 3 to 0.79 mg/m 3 , with a CH 4 loss rate of only 3.39 %, meeting the requirements for engineering applications. This study provides a novel and sustainable approach for removing siloxane from biogas, highlighting its potential for practical applications and future research.
研究领域:
膜科学
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环境工程
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化学工程
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材料科学
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Tong Zhang,Weiyin Chen,Wenxin Zhang,Lusheng Liao,Chengpeng Li,Peng Zhang
Flexible electronic skin ( E -skin) demands materials with skin-like softness, self-healing capability, and antibacterial properties for long-term wearable applications. Here, we developed a series of self-healing, antibacterial zwitterionic polydimethylsiloxane (PDMS) elastomers via a facile photo-polymerization strategy. The elastomer was synthesized by crosslinking acrylate-terminated PDMS (PDMS-IU-MA) with zwitterionic sulfobetaine methacrylate (SBMA) using reactive hyperbranched polysiloxane (HPBSi) containing methacrylate groups as a multifunctional mediator. The resulting material exhibited remarkable antibacterial effects against E. coli and S. aureus , attributed to the zwitterionic SBMA moieties, while the dynamic hydrogen-bonding network formed by urethane/urea groups enabled self-healing ability. The mechanical properties, self-healing efficiency, and antibacterial performance were systematically tuned by varying the SBMA content. Furthermore, a conductive E -skin capable of precisely monitoring human motion through resistance changes was fabricated by integrating liquid metal (LM) microdroplets into an optimized PDMS matrix. This work provides a scalable strategy to integrate antimicrobial protection, self-healing, and strain sensing into E -skin for next-generation wearable electronics.
研究领域:
材料科学
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高分子化学
·
可穿戴电子
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生物医学工程
·
柔性机器人
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2014
·
IF 3.583
Haiyun Zhai,Jiangmei Li,Zuanguang Chen,Zihao Su,Zhenping Liu,Xiao Yu
A simple glass/PDMS microfluidic chip for on-line sample pretreatment and contactless conductivity detection, which consisted of a 0.17 mm-thick glass cover and a PDMS substrate embedded with an SPE monolithic column, was presented in this paper. Using this integrated microchip system, sample extraction, injection, separation and detection were automatically performed in sequence. A sample of auramine O was concentrated by molecularly imprinted SPE (MISPE), eluted to sample reservoir, and injected by electromigration into separation channel for electrophoresis separation and contactless conductivity detection, with the calculated detection limit (S/N = 3) being 2.5 μg mL − 1 . The monolithic column was utilized to quantitatively extract auramine O , yielding an on-line enrichment factor of about 12. The microchip system is reliable and applicable to the analysis of auramine O in food sample.
研究领域:
分析化学
·
微流控技术
·
食品安全
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分子印迹技术
·
电泳学
·
生物医学工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2022
·
IF 4.291
Yan Zhong,Jiaqi Wang,Lei Han,Shengping Dai,Hao Zhu,Jing Hua,Guanggui Cheng,Jianning Ding
Flexible pressure sensors have played an increasingly important role in the Internet of Things (IoT) and human–machine interaction (HMI) systems. However, it is in a desire to fabricate the sensor with high sensitivity and low power consumption . In this paper, we have developed a self-powered triboelectric pressure sensor based on chemically modified micropatterned PDMS . Different wire meshes serve as template to fabricate microstructures on the triboelectric layer. To enhance the triboelectric output performance, introducing functional groups to the surface of the triboelectric layer to expand triboelectric polarity difference. By virtue of the cooperative effect of enhanced contact area variations from the PDMS microstructure’s gradual deformation, the reduced dielectric thickness as well as the increased charge density from the extended triboelectric polarity difference originated from chemical modification, the self-powered triboelectric sensor displays a sensitivity of 44.31 V kPa −1 in the range of 0.006–2 kPa and 7.16 V kPa −1 in the range of 2–8.5 kPa. Additionally, the self-powered triboelectric sensor is efficient in human motions measurement. This work provides a route to fabricate high-performance pressure sensor with morphological and chemical modification on the triboelectric polymers.
研究领域:
物联网(IoT)
·
人机交互(HMI)
·
传感器
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材料科学
·
电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）