Highly hydrophobic and partially conductive polydimethylsiloxane surface produced by direct fluorination and subsequent annealing

Xie, Danli; An, Zhenlian; Xiao, Huanhuan; Zheng, Feihu; Liu, Qingquan; Zhang, Yewen

doi:10.1109/tdei.2015.005005

Cited by 11 publications

(9 citation statements)

References 24 publications

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“…The result of fluorination of crosslinked polydimethylsiloxanes depends on their chemical structure: the initially hydrophobic surface of PDMS may become (i) superhydrophobic [54] and hydrophilic (with improved wetting ability with alcohol solutions) [103].…”

Section: Changes In the Hydrophilicity/hydrophobicity Of The Polymer Surface As A Results Of Fluorinationmentioning

confidence: 99%

“…The γ d SV value related to the density of the polymer in the surface layer [82] can serve as an indicator of the density of adhesive bonds at the interface between an adhesive and a substrate. Fluorination increases the density of polymers [83,117], but the trends in the change of γ d SV resulting from fluorination differ significantly for the groups of polar and non-polar polymers [37,54,101,106,118,119]. This may be due to the loosening of the polymer surface layer as a result of increasing roughness under different fluorination conditions.…”

Section: Adhesion and Specific Free Surface Energy Of Fluorinated Polymersmentioning

confidence: 98%

“…The structural change plays a dominant role over the compositional changes. Xie et al reported [54] that fluorine treatment increases the surface conductivity, but at the same time annealing decreases the surface conductivity of the fluorinated PDMS sheets by reducing the number of the structural defects, i.e., shallow physical traps.…”

Section: Electrical Properties Of Polymers After Direct Surface Fluorinationmentioning

confidence: 99%

“…Optimization of the wetting ability of polymer surfaces by fluorination is promising for use in offset printing [30,40,41], ensuring the protective properties of polymer materials [29,[42][43][44][45][46], membrane [27,47]; and sorbents [38] performance. Direct fluorination of polymers also results in the formation of deep and shallow charge traps on a surface that improves dielectric [48][49][50][51], piezoelectric [52,53] properties, surface conductivity [54,55], breakdown [48,56], and DC flashover [57][58][59][60][61][62] voltages.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Direct Fluorination as Method of Improvement of Operational Properties of Polymeric Materials

et al. 2020

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Direct fluorination of polymers is a widely utilized technique for chemical modification. Such introduction of fluorine into the chemical structure of polymeric materials leads to laminates with highly fluorinated surface layer. The physicochemical properties of this layer are similar to those of perfluorinated polymers that differ by a unique combination of chemical resistance, weak adhesion, low cohesion, and permittivity, often barrier properties, etc. Surface modification by elemental fluorine allows one to avoid laborious synthesis of perfluoropolymers and impart such properties to industrial polymeric materials. The current review is devoted to a detailed consideration of wetting by water, energy characteristics of surfaces, adhesion, mechanical and electrical properties of the polymers, and composites after the direct fluorination.

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Section: Changes In the Hydrophilicity/hydrophobicity Of The Polymer Surface As A Results Of Fluorinationmentioning

confidence: 99%

Section: Adhesion and Specific Free Surface Energy Of Fluorinated Polymersmentioning

confidence: 98%

Section: Electrical Properties Of Polymers After Direct Surface Fluorinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Direct Fluorination as Method of Improvement of Operational Properties of Polymeric Materials

et al. 2020

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“…It is worth noting that SEM has been applied for estimation of depth of fluorination by preparation and analysis of cross-section of the polymeric films [48,50,105,106]. Moreover, SEM is often combined with energy dispersive X-ray spectroscopy (EDXS).…”

Section: Microscopic Methodsmentioning

confidence: 99%

Fluorinated polymers: evaluation and characterization of structure and composition

Ivanov

Белов

2021

JAMT

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The proposed review represents the systematic analysis of modern methods and approaches for the characterization and structural evaluation of fluorinated polymers that have found a wide application as materials for chemical processing, chemically resistant components and coatings, pharmaceutical and electrical packaging, biomedical equipment, etc. The chemical composition of the polymers (fluorine content, its distribution inside the fluorinated materials, chemical bonds, presence of oxygen-containing groups) substantially influences on the operation properties (chemical resistance, adhesive, cohesive, optical, dielectrical, thermal, barrier, gas permeation) of the final polymeric products. Hence, it was of particularly importanсe to bond the emergence of specific features with the presence of fluorine in the chemical structure of polymer by means of related analytical techniques. Namely, we focused on spectral (IR, UV-VIS, NMR, XPS, EPR), chemical (elemental analysis), Secondary-ion mass spectroscopic (SIMS) and microscopic (AFM, SEM-EDX) methods emphasizing their general consideration and limitations as well as application for the in-depth characterization.

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Boosting the Photovoltaic Performance and Thermal Stability of Organic Solar Cells via an Insulating Fluoropolymer Additive

Zeng

et al. 2022

ChemPlusChem

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The use of processing additives is one of the most widely used approaches to optimizing the bulk heterojunction (BHJ) morphology for boosting the photovoltaic performance of organic solar cells (OSCs). Recently, insulating polymer-based additives have drawn great attention owing to the merits of good morphology-directing abilities, simple post treatments, rich functionality and enhanced device stabilities. In this contribution, a known fluoropolymer poly-p-trifluoromethylstyrene (PTFS) is selected as a solid additive. Employing PTB7-Th:PDI2 (ethylene-annulated perylene diimide dimer) as the prototype active layer, the devices processed with PTFS shows a best power conversion efficiency (PCE) of 6.64 %, which is the highest efficiency for nude PDI2-based OSCs. For comparison, the photovoltaic performance OSCs processed with polystyrene (PS) or without additive were investigated, PCEs of 5.29 % and 5.76 % were obtained, respectively. It is worth noting that the utilization of PTFS can also improve the thermal stability of the devices pronouncedly. Moreover, PTFS based additive also displays enhanced performance in other devices with different active layers, illustrating a good universality in OSCs. The enhancement of the PCE and thermal stability may result from the relatively lower surface energy of PTFS, which can boost the light absorbance capability as well as promote a favorable phase separation of the active layer.

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Highly hydrophobic and partially conductive polydimethylsiloxane surface produced by direct fluorination and subsequent annealing

Cited by 11 publications

References 24 publications

Direct Fluorination as Method of Improvement of Operational Properties of Polymeric Materials

Direct Fluorination as Method of Improvement of Operational Properties of Polymeric Materials

Fluorinated polymers: evaluation and characterization of structure and composition

Boosting the Photovoltaic Performance and Thermal Stability of Organic Solar Cells via an Insulating Fluoropolymer Additive

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