Carbon Letters
·
2023
·Vol. 33
·期 7
·2153-2159
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IF 4.5
Cao Song
Dimethyl silicone oil is widely used due to its excellent thermal stability and good wetting properties. In this study, a series of thermal conductive materials was prepared by physically blending and chemically loading graphene as a thermal conductive filler into dimethyl silicone oil, and their thermal conductivity and tribological properties were investigated. The thermal conductivity of the composites was tested by a thermal conductivity meter and a thermal imaging camera, while the tribological properties of the composites were evaluated using a CSM friction and wear tester. The results showed that both thermal conductivity and tribological properties were improved to a certain extent. The particle size and amount of graphene had a significant influence on the thermal conductivity. For graphene with a single particle size, the thermal conductivity increased with increasing graphene content. The friction coefficient under dry friction conditions was significantly reduced by adding graphene to the silicone oil, as revealed by the friction and wear test.
研究领域:
材料科学
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热传导工程
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DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2019
·Vol. 16
·期 9
·1629
·
IF 2.468
Jie-Xu Ye,Tong-Hui Lin,Jing-Tao Hu,Rabin Poudel,Zhuo-Wei Cheng,Shi-Han Zhang,Jian-Meng Chen,Dong-Zhi Chen
In this study, a water–silicone oil biphasic system was developed to enhance the biodegradation of monochlorobenzene (CB) byDelftia tsuruhatensisLW26. Compared to the single phase, the biphasic system with a suitable silicone oil fraction (v/v) of 20% allowed a 2.5-fold increase in the maximum tolerated CB concentration. The CB inhibition onD. tsuruhatensisLW26 was reduced in the presence of silicone oil, and the electron transport system activity was maintained at high levels even under high CB stress. Adhesion of cells to the water–oil interface at the water side was observed using confocal laser scanning microscopy. Nearly 75% of cells accumulated on the interface, implying that another interfacial substrate uptake pathway prevailed besides that initiated by cells in the aqueous phase. The 8-fold increase in cell surface hydrophobicity upon the addition of 20% (v/v) silicone oil showed that silicone oil modified the surface characteristics ofD. tsuruhatensisLW26. The protein/polysaccharide ratio of extracellular polymeric substances (EPS) fromD. tsuruhatensisLW26 presented a 3-fold enhancement. These results suggested that silicone oil induced the increase in the protein content of EPS and rendered cells hydrophobic. The resulting hydrophobic cells could adhere on the water–oil interface, improving the mass transfer by direct CB uptake from silicone oil.Keywords:waste gas;monochlorobenzene;biodegradation;silicone oil;cell adhesion
研究领域:
环境科学
·
微生物学
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DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yuehua Zhao,Bo Peng,Lijun Liu,Yanming Fu,Tianyu Zhao,Weichao Chi,Dong Li,Dong Ji,Xin Wang,Dapeng Wang
To facilitate effective training for freestyle skiers on artificial dry ski slopes, it is crucial to reduce the friction coefficient of the slopes and closely match it with that of snow. Traditional lubrication methods, such as water or soapy water, come with multiple disadvantages, including water waste, which leads to environmental pollution, short-lived effectiveness, and high costs. In this study, we have successfully developed a method for the scalable preparation of a liquid-infused coating (LIC) by tandem spraying inexpensive and environmentally friendly SiO2 particles and silicone oil lubricants. Experimental results showed that the resulting LIC is capable of imparting slippery properties to various surfaces, regardless of the surface chemistry. Moreover, the presence of LIC could reduce the friction coefficient significantly. By carefully regulating the surface composition, we achieved a friction coefficient of 0.059 between a snowboard and the LIC-functionalized ski slope, closely matching that between the snowboard and snow in a typical skiing competition venue (∼0.06). We successfully applied LIC onto 103 m2 dry ski slopes, providing a training ground for professional freestyle skiers.
研究领域:
材料科学
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环境科学
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DOI
PubMed
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
Journal of Cleaner Production
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2021
·
IF 9.297
Wenqing Cheng,Liujun Pei,Muhammad Asad Saleem,Lei Zhu,Jiping Wang
Clean dyeing technologies for polyester textiles, particularly waterless dyeing, have been studied extensively in recent decades. In the present work, a new waterless dyeing technology, the silicone medium dyeing, for polyester textiles had been investigated. The dyeing process of polyester textile in the silicone medium was optimized by determining the dyeing temperature, holding time, type and dosage of dye accelerator. The dye uptake of disperse dye and the fastness properties of the dyed polyester were equivalent to those of conventional water-bathed dyeing. After dyeing, polyester textile had a better color levelness. From the TGA and XRD results, it can be proved that silicone medium has no adverse effects on the fiber and can be used as a dyeing medium. The influence of the increase of halogen in the diazotized component on the affinity, dye uptake, diffusion coefficient , and other parameters was obtained by analyzing the dye uptake of C.I. Disperse Orange 44 and C.I. Disperse Yellow 163. These parameters formulate guidelines for the selection of disperse dyes for silicone medium dyeing system. To verify the feasibility of industrialization, pilot-scale dyeing was carried out. The results showed that, as compared to aqueous dyeing, higher colorfastness and better color levelness were obtained from silicone media. Therefore, this eco-friendly dyeing technology has considerable potential to become a mainstream dyeing method in the foreseeable future.
研究领域:
纺织科学
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环境科学
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染整工程
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产品关联
DOI
高影响因子
POWDER TECHNOLOGY
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2023
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IF 5.2
Minghan Wan,Bing Xu,Lei Shi,Nianben Zheng,Zhiqiang Sun
Nanofluid-based volumetric-type solar collectors have emerged as a promising technique for solar thermal applications. However, achieving the long-term stability of nanofluids under high-temperature, high-flux irradiation, and shear-flow conditions is still challenging. Herein, we propose a facile method to stabilize silicon oil-based multi-walled carbon nanotube (MWCNT) nanofluids via shear flow. The effects of shear flow on the stability of nanofluids are experimentally evaluated. Results indicate that the shearing force can break up the clusters. Once achieving a dynamic equilibrium between cluster formation and cluster breakage, the instability of nanofluids can be controlled within 7.3% for the heating temperature range 140 °C–180 °C. Besides, the shear-flow stabilized nanofluids can keep dynamic stability and maintain high solar thermal conversion performance with an efficiency reduction of within 7% after cyclic tests under irradiation of 19 Sun for 24 h. The proposed method offers a practical path for stabilizing nanofluids under harsh conditions.
研究领域:
材料科学
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能源工程
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热力学
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产品关联
DOI
高影响因子
POLYMER
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2025
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IF 4.5
Naifan Dong,Jintang Duan,Cailiang Zhang,Xueping Gu,Lianfang Feng,Liu Liu
Polysiloxanes with amino functional groups exhibit remarkable backbone flexibility, lubricity, and softness, positioning them a promising class of polymer materials. The phosphazene base (Bu-t-P 4 ) serves as an effective catalyst for the ring-opening copolymerization (ROCP) of octamethylcyclotetrasiloxane (D 4 ) and N-β-(aminoethyl)-γ-aminopropylmethyldiethoxysilane (KH-602). Under catalysis by 100 ppm of Bu-t-P 4 at 110 °C for 1 h, high yield of 93.59 % was achieved, resulting in amino silicone oil with a number-average molecular weight of 4.3 × 10 3 g/mol, and a narrow molecular weight distribution (2.00). Fourier-transform infrared spectroscopy and nuclear magnetic resonance (NMR) confirmed that the product's structure corresponds to expected chemical shifts. In situ Raman spectroscopy monitoring and NMR analysis was employed to propose and validate the polymerization mechanism within the Bu-t-P 4 -catalyzed system involving both cyclic and linear monomers. This study demonstrates an effective strategy, affirming that Bu-t-P 4 can be used as an efficient organic catalyst for the modified polysiloxanes.
研究领域:
材料科学
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有机化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2022
·Vol. 139
·期 45
·e53021
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IF 3.057
Mingzhe Li,Bin Cao,Ruiqi Shang,Hongwei Mei,Liming Wang
Silicone rubber is used as an antipollution flashover material in outdoor insulation, which is susceptible to aging and has a shorter service life than other candidates. Microcracks are a common aging phenomenon that are difficult to be detected and repaired. The microcapsule self-healing technology can be used to repair microcracks and extend the service life of silicone rubber. This study considers hydrogen silicone oil as a representative of the polydimethylsiloxane healing agent system. Poly(urea–formaldehyde) microcapsules containing the hydrogen silicone oil are synthesized by in situ polymerization. The effects of the emulsifier concentration, initial pH value, initial ratio of the core–shell material, and sodium chloride (NaCl) concentration on the synthesis are investigated. Accordingly, the properties of the microcapsules before and after long-term storage are analyzed. The results demonstrate that microcapsules synthesized using poly(ethylene-alt-maleic anhydride) (EMA)+ polyvinyl alcohol (PVA) as the emulsifier have satisfactory morphology and performance, where the best synthesis conditions are 0.13 wt% EMA, 0.05 wt% PVA, initial ratio of the core–shell material of 1.5:1–2.0:1, initial pH value of 3.5–4.0, and 2 wt% NaCl. In long-term storage, the core material is well protected by the shell material. The synthesized microcapsule can serve as a material in the self-healing system of silicone rubber.
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
ACS Nano
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2025
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IF 16
Leilei Chen,Hengao Yu,Jilan Yang,Jinzhuo Shi,Chun-he Li,Zijie Qu,Wendong Wang
Ferrofluids are stable colloidal dispersions of magnetic nanoparticles in carrier liquids. Their combination of magnetic and fluidic characteristics not only inspires fundamental inquiries into forms and functions of matter but also enables diverse applications ranging from sealants and coolants in mechanical devices to active components in smart materials and soft robots. Spurred by such fundamental and applied interests, a growing need for easy-to-synthesize, high-quality ferrofluid exists. Here, we report the facile synthesis and comprehensive characterization of a silicone oil-based ferrofluid that displays the characteristic surface instability of high-quality ferrofluids and demonstrate its functions in smart interfacial materials and soft robots. Silicone’s chemical immiscibility with polar solvents and its biological inertness, when coupled with magnetic responsiveness and fluidic deformability, enable the manipulation of solid particles, gas bubbles, simple and complex liquids, as well as micro-organisms. We envision that the silicone oil-based ferrofluid will find applications in diverse areas, including magnetic digital microfluidics, multifunctional materials, and small-scale robotics.
研究领域:
材料科学
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化学工程
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机器人学
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产品关联
DOI
PubMed
高影响因子
Polymers
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2025
·Vol. 17
·期 9
·1204
·
IF 4.9
Yi Guo,Cheng Yao
In this study, polymerized silicone surfactants were modified with polyether and tertiary amine groups with the aim of improving the surface performance. Various PSiEO/(PO)-OH(CH3) surfactants were synthesized and their structures and performance were characterized through1H NMR, FTIR spectroscopy, static surface tension, dynamic surface tension, zeta potential, and dynamic light scattering measurements. Subsequently, the modified silicones were incorporated as surfactants in aqueous solutions with different pH values. The surfactants with different hydrophobic/hydrophilic groups and end-capping groups exhibited different surface performances over a wide pH range. Thermodynamic parameters indicated that the micellization and adsorption of these surfactants were endothermic and spontaneous processes driven by entropy. The processes were hindered by increasing the solution pH and modification with hydrophobic groups. The aggregation behavior was significantly different under acidic, neutral, and basic aqueous conditions.
研究领域:
材料科学
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表面化学
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物理化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
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IF 8.097
Bin Shang,Min Chen,Limin Wu
The biomimetic fabrication of Nepenthes as a new class of liquid-repellent surface materials has attracted much attention recently, but there still remains big challenges, for example, short-serving life, instability, and so forth. Herein, we develop a novel strategy to fabricate robust slippery liquid-repellent coating by the synthesis and use of silicon oil-contained ultraviolet-responsive microcapsules. Owing to the physical and chemical inertness of silicon oil and the substantial randomly dispersed microcapsules in the coating, this nepenthes-like liquid-repellent coating can not only endure different harsh environments but also have excellent long-term self-healing functions.
研究领域:
材料科学
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仿生学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2014
·Vol. 72
·期 2
·385-393
·
IF 1.547
Guo Ping,Zhai Shang-Ru,Xiao Zuo-Yi,Zhang Feng,An Qing-Da,Song Xiao-Wei
Fabrication of s uerhydrophobic materials towards oil/water separation and oil absorption has been receiving great attention nowadays, due to the significant increase of industrial oily wastewater and frequent accident of oil spill. In most previous studies, the usage of expensive precursors restricted the wide applications of prepared superhydrophobic materials. In this work, superhydrophobic filter paper, fabric and polyester sponges were fabricated by dip-coating the mixed solution of polystyrene and xerogels, which were prepared with tetraethoxysilane and polymethylhydrosiloxane, based on previous work. The as-fabricated fabric can effectively separate oil and water mixtures and possesses excellent reusability; more significantly, the materials maintained its good hydrophobic and excellent oil/water separation capacity even after ten cycles. Interestingly enough, the stability was provided, as a result, the fabric still exhibited superhydrophobic after 100 abrasion times and showed high repellency towards many liquids with different pH values. Additionally, the coated polyester sponges can quickly absorb various oil and organic liquid, which will offer a practical application for the treatment of seawater or oily wastewater. By contrast, this experiment process is simple and avoided using costly fluoro-chemicals or complicated fabrication process.
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
危险品化学品经营许可证（带存储）