Surface modifications of polystyrene and their stability: A comparison of DBD plasma deposition and direct fluorination

Kong, Fei; Chang, Chao; Ma, Yuanhui; Zhang, Cheng; Ren, Chengyan; Shao, Tao

doi:10.1016/j.apsusc.2018.07.211

Cited by 67 publications

(42 citation statements)

References 38 publications

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“…Another mechanism was also reported, i.e., a correlation of surface charges and wetting properties was found [90]. The aging of the surface modification could therefore be influenced also by the plasma-modified electrical properties of the surfaces [91,92,93].…”

Section: Resultsmentioning

confidence: 99%

Fast Surface Hydrophilization via Atmospheric Pressure Plasma Polymerization for Biological and Technical Applications

et al. 2019

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Polymeric surfaces can benefit from functional modifications prior to using them for biological and/or technical applications. Surfaces considered for biocompatibility studies can be modified to gain beneficiary hydrophilic properties. For such modifications, the preparation of highly hydrophilic surfaces by means of plasma polymerization can be a good alternative to classical wet chemistry or plasma activation in simple atomic or molecular gasses. Atmospheric pressure plasma polymerization makes possible rapid, simple, and time-stable hydrophilic surface preparation, regardless of the type and properties of the material whose surface is to be modified. In this work, the surface of polypropylene was coated with a thin nanolayer of plasma-polymer which was prepared from a low-concentration mixture of propane-butane in nitrogen using atmospheric pressure plasma. A deposition time of only 1 second was necessary to achieve satisfactory hydrophilic properties. Highly hydrophilic, stable surfaces were obtained when the deposition time was 10 seconds. The thin layers of the prepared plasma-polymer exhibit highly stable wetting properties, they are smooth, homogeneous, flexible, and have good adhesion to the surface of polypropylene substrates. Moreover, they are constituted from essential elements only (C, H, N, O). This makes the presented modified plasma-polymer surfaces interesting for further studies in biological and/or technical applications.

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Section: Resultsmentioning

confidence: 99%

Fast Surface Hydrophilization via Atmospheric Pressure Plasma Polymerization for Biological and Technical Applications

et al. 2019

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“…Numerous studies have shown that surface fluorination is an effective way to improve the surface flashover performance in vacuum of insulator materials [85][86][87][88][89][90][91][92][93][94], including epoxy and its composite [85,93], high-density polyethylene (HDPE) [93], polystyrene (PS) [94] and other materials. Authors apply the fluorination treatment method in low-density polyethylene (LDPE) to improve the surface flashover voltages and the surface potential decay (SPD) to characterise properties of insulator surface [95].…”

Section: Surface Modificationmentioning

confidence: 99%

“…In the above results of the modification method to improve surface flashover performance, it is found that adjusting trap parameters can effectively improve surface flashover performance in vacuum. Some of these results show that the trap levels became shallower after insulator modification, and have a negative correlation with the surface flashover voltage [82,87,[93][94][95][96]106]. In other results, however, the trap levels become deeper after insulator modification and have a positive correlation with the surface flashover voltage [117,119,120,122,130,135,136,138,139,141,144,149].…”

Section: 'U-shaped' Dependence Of Surface Flashover Performance On Thmentioning

confidence: 99%

Improvement of surface flashover in vacuum

2020

High Voltage

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Surface flashover of insulation systems is a basic issue in the field of high voltage and electrical insulation. To improve the surface flashover performance is of great significance for the development of advanced power transmission equipment and insulation materials. This study reviews the research progress of surface flashover in vacuum regarding to effective methods to improve the surface flashover performance in vacuum, including insulation system optimisation and material modification. The former one is beneficial to reduce the electric field distortion, and the later one is able to adjust the surface trap parameters of the material through physical and chemical methods. In addition, the 'U-shaped' curve is proposed to reveal the relationship between surface flashover voltage and surface trap level, discovering the synthetic effects of surface traps on surface flashover. It is expected that the 'U-shaped' curve will become a guidance to improve surface flashover performance through adjusting trap parameters. Moreover, several suggestions are made to build unified surface flashover model which is suitable to the range from high vacuum to high pressure.

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“…It is generally true that surface properties of filler play a crucial part on the affinity of polymer and inorganic fillers, and there are various activation treatments applied to manipulate surface modification of inorganic materials during the past few decades including coupling agent modification, mechanical activation, thermal activation, surfactant modification, plasma treatment, and microwave activation. [20][21][22][23][24][25][26][27][28][29][30] Among these methods, coupling agents can change the surface wettability of materials without affecting the most properties, and it has been widely used in surface modification of inorganic matters due to easy availability and high efficiency, including silane coupling agents, titanate coupling agents, aluminate coupling agents, and rare-earth coupling agents. [20][21][22][31][32][33][34] With the excellent performance, titanate coupling agents are consumed popularly in surface treatments of numerous materials.…”

Section: Introductionmentioning

confidence: 99%

Impact of titanate coupling agent on properties of high density polyethylene composite filled with coal gangue

Ding

Zhang

et al. 2020

Surface & Interface Analysis

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In this study, surface modification of coal gangue (CG) was performed with titanate coupling agent 201 (isopropyl tri(dioctylpyrophosphate) titanate), and the effects of surface modifier on mechanical properties and thermal stability of high‐density polyethylene filled with CG (HDPE/CG) and high‐density polyethylene filled with modified CG (HDPE/mCG) composites were investigated. The coupling agent was successfully grafted on CG surface through chemical reaction according to the analyses of Fourier transform infrared spectroscopy (FT‐IR) and X‐ray photoelectron spectroscopy (XPS), and the coupling agent can effectively enhance the hydrophobicity of surface that was verified by water contact angle beyond 90° of modified CG sample. With the introduction of coupling agent, some enhancements of tensile strength, flexural strength, and impact strength were observed in HDPE/mCG compared with HDPE/CG, due to the improved compatibility between mCG fillers and matrix. The increased storage modulus and decreased loss factor of HDPE/mCG composite further confirm the stronger interface adhesion after modification. Moreover, it is found that titanate coupling agent 201 can improve the thermal stability of HDPE/mCG composite to some extent.

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Surface modifications of polystyrene and their stability: A comparison of DBD plasma deposition and direct fluorination

Cited by 67 publications

References 38 publications

Fast Surface Hydrophilization via Atmospheric Pressure Plasma Polymerization for Biological and Technical Applications

Fast Surface Hydrophilization via Atmospheric Pressure Plasma Polymerization for Biological and Technical Applications

Improvement of surface flashover in vacuum

Impact of titanate coupling agent on properties of high density polyethylene composite filled with coal gangue

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