CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Tao Yan,Hui Ren,Jie Liu,Qingjie Jiao
To improve reaction rate of energetic materials, electrospray technology was applied to develop microspheres in which recrystallized cyclotrimethylene trinitramine (RDX) was integrated with nano-Al (nAl) particles and Viton through a two-solvent strategy. Results on morphology properties and chemical heterogeneity demonstrated that the electrosprayed microspheres were hollow spheres containing well-dispersed RDX . It was suggested that RDX nano-crystals adhere tightly on both sides of the nAl@Viton skeletons, thereby increasing the contact area among components. The thermal analysis of the microspheres indicated that nAl particles accelerated the energy release by decreasing the apparent activation energy for microsphere decomposition. Experimental results showed that electrosprayed nAl@RDX@Viton had shorter laser ignition delay and more vigorous combustion flame than the physical mixture, which benefitted from the characteristic structure and synergistic effects of the components.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
Results in Engineering
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2024
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IF 6
Thi Thi Mar,Yunlong Xue,Yu Chang,Zijian Yu,Zhongxiao Du,Bing Cao,Rui Zhang
Pervaporation emerges as a promising technique for brine treatment. In this investigation, we employed a PVDF substrate layer and applied various coating solutions using a simple spray technique to produce a composite pervaporation membrane. The composite membrane's chemical structure, morphology, hydrophilicity, swelling property, surface roughness, and crosslinking conditions were thoroughly investigated. Notably, the PVDF/PEI/P(SS-MA) composite membrane exhibited outstanding desalination performance, demonstrating high salt rejection and flux of 308.7 ± 13.8 kg m −2 h −1 when subjected to a 3.5 wt% sodium chloride solution. Even at an elevated brine concentration of 20 wt%, the membrane maintained a commendable flux of 88.76 ± 5.4 kg m −2 h −1 at 72 °C. These findings underscore the efficacy of the developed composite membrane for brine desalination applications.
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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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2020
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IF 3.871
Lei Xiao,Lujia Zhao,Xiang Ke,Tengyue Zhang,Gazi Hao,Yubing Hu,Guangpu Zhang,Hu Guo,Wei Jiang
Nanothermites have a promising study in micro propellant due to its faster reaction rate, higher energy-release efficiency, and significantly enhanced combustion performance. However, most thermites prepared by physical mixing are easy to separate during the propellant preparation process, significantly impeding the embodiment of the advantages of thermite. In this study, Al/CuO/PVDF microspheres incorporating high explosive RDX have been successfully assembled by electrospray technology. The thermal and combustion performance of the composite microspheres have significantly improved. They have shorter delay time, burning time, and higher pressure, pressurization rate than the physical mixtures, which are attributed to their uniform structure and the interaction of the components. And based on combustion tests, the combustion performance of microspheres is mainly affected by the content of RDX. These results indicate that the electrospray technology and adding RDX into microspheres are effective methods to prepare nanothermites with enhanced reactivity.
研究领域:
材料科学
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燃烧与爆炸领域
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2022
·Vol. 139
·期 42
·e53034
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IF 3.057
Yu Feng,Ziyuan He,Zhijie Yang,Wenxin Tang,Qingguo Chi,Qingguo Chen
The bottleneck problem of the development of high-voltage motors to a larger capacity can be solved if the thermal conductivity is improved without sacrificing the insulation characteristics of the main insulation material. In this paper, a spraying technology based on electrospinning is proposed that can evenly spray boron nitride (BN) with high thermal conductivity onto the surface of mica tape. With the increase in BN content, the insulation and thermal conductivity of mica tape are optimized to varying degrees. When the BN content reaches 2.25 wt%, the in-plane conductivity increases from 1.6 to 2.7 w/(m K), while the out-of-plane conductivity increases from 0.17 to 0.26 w/(m K). Additionally, the direct-current (DC) breakdown strength has increased from 90.6 to 96.9 kV/mm and the dielectric constant and dielectric loss are almost unchanged. Finally, through simulation verification, if the modified mica tape is applied to the main insulation of a synchronous motor, the operating temperature of the motor insulation will be reduced from 73.5 to 66.1°C. This study provides a new research idea for the preparation of high thermal conductivity insulating materials.
研究领域:
材料科学
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电气工程
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DOI
高影响因子
MATERIALS LETTERS
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2015
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IF 2.489
Yuan Gao,Ding Zhao,Ming-Wei Chang,Zeeshan Ahmad,Xiang Li,Hairui Suo,Jing-Song Li
The electrospraying process has been exploited in recent times to prepare micro- and nano-scaled polymer based particulate structures for a range of biomedical and pharmaceutical applications. Conventionally, three main parameters (applied voltage, flow rate and base solvent in processing polymeric media) are used to manipulate their morphologies during preparation (size, surface and porosity). In this work, an un-conventional approach is demonstrated to yield biocompatible core–shell encapsulated (poly-ε-caprolactone (PCL) and silicon oil) particles with a range of structural morphologies (i.e., spherical, hemi-spherical and oblate shaped). Retaining its advantageous single-step fabrication aspect and by using two co-axial needles, a range of collection media was used to demonstrate shape and size variation (from ~28–48 μm) using optical and scanning electron microscopy. The morphological variation is directly linked to surface tension of the collection liquid. In addition, the non-volatile and flexible nature of the oil core plays a role in geometry formation. In vitro release from these structures demonstrates significant and non-significant variations; providing pathways to control release as well mimic release profile but alter other biomedical process (e.g. ultrasound). These findings demonstrate an alternative approach to manipulate the shape of bi-phasic structures which is an important functional property in several biomedical remits (e.g. drug delivery and ultrasound). Download : Download full-size image
研究领域:
生物医学工程
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制药科学
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DOI
高影响因子
INTEGRATED FERROELECTRICS
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2018
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IF 0.367
Tao Yan,Hui Ren,Qingjie Jiao,Lan Yu,Yaru Li
Nano-aluminum/nitrocellulose microspheres were fabricated using electrospray technique. Effects of solvent composition, nitrocellulose content and precursor concentration on the morphology and size distribution of the microspheres were investigated. The modified materials parameters were selected to generate RDX/nano-aluminum/nitrocellulose core-shell microspheres by electrospray with a coaxial needle. The morphology of core-shell microsphere was dependent on the relative ratio between the inner and outer flow rate as well as the applied voltage. For a system with a constant inner flow rate, there is an optimal range for the outer flow rate and the applied voltage.
研究领域:
材料科学
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能量材料
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DOI
高影响因子
FIBERS AND POLYMERS
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2024
·Vol. 25
·期 7
·2443-2456
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IF 2.2
Li Keyu,Liang Miaoqing,Zhang Mei,Nie Jinmei,Bao Lihong
In this study, a dye-sensitizing graphene/TiO 2 (DTG) based photocatalytic composite film (TPU-DTG) was developed to address the challenging recovery of graphene photocatalyst powder from treated sewage. The composite film was created by incorporating self-made dye-sensitizing graphene/TiO 2 onto an electrospun polyurethane film using electrostatic spraying technology. The structure and morphology of the composite film were analyzed using Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), and X-ray diffraction (XRD). Additionally, the tensile properties and thermal stability of the composite film were examined. X-ray diffraction (XRD) analysis indicated the presence of the diffraction peak of the DTG 101 crystal plane. SEM observation of TPU-4%DTG showed that the photocatalytic nanoparticles were evenly dispersed on the fiber membrane without visible agglomeration. TPU-4%DTG presented a maximum fracture stress of 17.2128 N and an elongation at a break of 335.43%. The photocatalytic performance study revealed that TPU-4%DTG was capable of eliminating over 99% of methylene blue (MB) within 10 h, and even after five cycles of photocatalytic experiments, the removal rate of MB remained above 90%.
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
COMPOSITES PART B-ENGINEERING
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2021
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IF 9.078
Han Wang,Yi Zhang,Haoting Niu,Liyun Wu,Xuhua He,Tao Xu,Nanyang Wang,Yagang Yao
Electrospinning is sometimes used to prepare filler/polymer composite materials for thermal management owing to the linear filler orientation and convenient processing. However, the filler–polymer thermal resistance inside the electrospun fibers and the lack of effective connection between the electrospun fibers affect the filler utilization efficiency of electrospun films. In the present work, an electrospinning–electrospraying technique was applied as a new strategy to prepare filler–polymer composites, where electrospinning was used to provide the main heat conduction path, and electrospraying was adopted to connect the electrospun fibers and construct an extra heat conduction path. Finally, an electrospun–electrosprayed composite film with a thermal conductivity of 24.98 W/(m·K) at 40 wt% boron nitride nanosheet (BNNS) content was produced. The thermal conductivity of the electrospun–electrosprayed film with 30 wt% BNNS was 1.7 times that of the electrospun film. This study represents the first use of the electrospinning–electrospraying method to prepare high-thermal-conductivity composite materials, and this method shows great potential for the preparation of such materials for thermal management.
研究领域:
材料科学
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热管理工程
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DOI
高影响因子
SENSORS
·
2020
·Vol. 20
·期 15
·4118
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IF 3.275
Peng Yu,Muhan Deng,Yi Yang,Beixi Nie,Shaoyu Zhao
The concentrations of nitrite and thiocyanate in saliva can be used as the biomarkers of the progression of periodontitis disease and environmental tobacco smoke exposure, respectively. Therefore, it is particularly necessary to detect these two indicators in saliva. Herein, the three-dimensional single-layered paper-based microfluidic analytical devices (3D sl-μPADs) were, for the first time, fabricated by the spraying technique for the colorimetric detection of nitrite and thiocyanate at the same time. The conditions for 3D sl-μPADs fabrication were optimized in order to well control the penetration depth of the lacquer in a paper substrate. Then, the developed 3D sl-μPADs were utilized to simultaneously detect nitrite and thiocyanate and the limits of detection are 0.0096 and 0.074 mM, respectively. What is more, the μPADs exhibited good specificity, good repeatability, and acceptable recoveries in artificial saliva. Therefore, the developed 3D sl-μPADs show a great potential to determine nitrite and thiocyanate for the assessment of the human health.Keywords:three-dimensional microfluidic devices;spraying;colorimetric analysis;nitrite;thiocyanate
研究领域:
分析化学
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医学诊断
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环境健康
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Jing Zhao,Zhenhong Zhao,Aohan Hou,Qijiao Jiang,Juan Xie,Qi Feng,Zhengrong Li,Yangling Li,Gang Huang,Jianhua Yan,Xianfeng Wang
Waterproof and breathable membranes (WBMs) are essential in diverse applications, including textiles, healthcare, electronics, and construction. Traditional WBMs often rely on hazardous solvents and fluorinated compounds, posing considerable risks to human health and the environment. This study presents an eco-friendly, fluorine-free nanofibrous WBM with asymmetric wettability, fabricated using ethanol, a green solvent, and electrospray technology to coat alcohol soluble polyamide/trimethylolpropane tris (2-methyl-1-aziridine propionate) (EPA/TTMA) nanofibers with a waterborne hydrophobic polyurethane (HPU) emulsion. The resulting EPA/TTMA-HPU WBMs feature a robust three-dimensional cross-linked structure that retains its integrity even after exposure to ethanol. These nanofibrous membranes exhibit differential properties, with a waterproof performance of 103.2 kPa and a moisture permeability of 9.28 kg·m-2·d–1 on the hydrophobic side, and 96.1 kPa with 6.92 kg·m-2·d–1 on the hydrophilic side, outperforming most fluorine-free WBMs. Furthermore, the durability of the EPA/TTMA-HPU membranes is significantly enhanced by the incorporation of HPU, enabling them to withstand 40 abrasion cycles, 24 h of ultrasonic washing, and ultraviolet irradiation. This study presents a scalable, environmentally benign method for fabricating high-performance WBMs, advancing sustainable membrane technology for protective textiles and other applications.
研究领域:
材料科学
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纺织工程
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环境科学
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产品关联
DOI
高影响因子
TALANTA
·
2024
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IF 5.6
Linsen Li,Yulong Zeng,Ge Yang,Hao Liu,Chao Zhu,Ying Zhang,Feng Qu,Qiang Ma
Ambient ionization mass spectrometry (AIMS) allows rapid analysis of targets, while its overall selectivity is somewhat limited due to the lack of chromatographic separation. Recently, magnetic blade spray (MBS) has enhanced AIMS by incorporating immunomagnetic beads instead of the traditional coated blade spray (CBS) coating, thereby improving selectivity and sensitivity by targeted analyte detection and reducing background interference. In this study, an aptamer-functionalized and nucleic acid dye (GelRed)-loaded MS probe (AGMP) was developed and employed with MBS-based miniature mass spectrometer. Specifically, AGMP was assembled using aptamer-functionalized magnetic nanoparticles loaded with GelRed as mass tags for highly sensitive analysis of endoglin (CD105). For the preparation of AGMP, the CD105 binding aptamer of End-A2 was first selected through three rounds of capillary electrophoresis (CE)-SELEX with an optimal affinity of 62.3 pM. After optimizing the critical parameters that affected adsorption, desorption, and ionization efficiency, this method displayed satisfactory sensitivity with detection and quantitation limits of 0.2 and 1 ng/mL, respectively, as well as reliable recoveries of 90.1–106.8 % with relative standard deviations of 1.6–5.4 %. Besides, the method effectively mitigated the matrix effects with a slope deviation of 10.03 %, and exhibited good selectivity and environmental friendliness. Furthermore, this AGMP-based MBS strategy was successfully applied for CD105 detection in serum samples, demonstrating its potential for sensitive and on-site biomolecule analysis in complex matrices.
研究领域:
分析化学
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医学诊断
·
生物分析
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Hui Liu,Li Zhang,Jianying Huang,Xiaoli Zhang,Jiajun Mao,Zhong Chen,Qinghui Mao,Mingzheng Ge,Yuekun Lai
Superwetting materials with multiple functions have drawn heightened attention due to their delicately adjustable surface wettability . However, realizing the full potential of diversified functions is often hampered by the usually symmetrical wetting state. Herein, we introduce a versatile electro-spraying technique to construct a patterned PDMS/PMMA coating with asymmetrical wettability. The tunable superwetting patterns are able to achieve the required functional diversity. The as-prepared superhydrophobic fabric can act as a separation filter with a high separation efficiency and satisfactory cycling ability. With the wettability difference, such patterned surfaces can also manipulate the successive drops motions, and relation between the surface patterns and the controllable movement is demonstrated. In addition, the patterned surface can serve as a smart signal-expression membrane, thereby enabling real-time variable liquid signal expression with alterable signals. The exciting results have paved the way for expanding the application foreground of smart superwetting materials in microfluidics and signal-detection.
研究领域:
材料科学
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微流控技术
·
表面工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）