Polymers
·
2018
·Vol. 10
·期 9
·979
·
IF 2.935
Chunfang Zhu,Haitao Yang,Hongbo Liang,Zhengyue Wang,Jun Dong,Lei Xiong,Jianping Zhou,Junjun Ke,Xi Xu,Weixian Xi
Low surface energy materials have attracted much attention due to their properties and various applications. In this work, we synthesized and characterized a series of ultraviolet (UV)-curable fluorinated siloxane polymers with various fluorinated acrylates—hexafluorobutyl acrylate, dodecafluoroheptyl acrylate, and trifluorooctyl methacrylate—grafted onto a hydrogen-containing poly(dimethylsiloxane) backbone. The structures of the fluorinated siloxane polymers were measured and confirmed by proton nuclear magnetic resonance and Fourier transform infrared spectroscopy. Then the polymers were used as surface modifiers of UV-curable commercial polyurethane (DR-U356) at different concentrations (1, 2, 3, 4, 5, and 10 wt %). Among three formulations of these fluorinated siloxane polymers modified with DR-U356, hydrophobic states (91°, 92°, and 98°) were obtained at low concentrations (1 wt %). The DR-U356 resin is only in the hydrophilic state at 59.41°. The fluorine and siloxane element contents were investigated by X-ray photoelectron spectroscopy and the results indicated that the fluorinated and siloxane elements were liable to migrate to the surface of resins. The results of the friction recovering assays showed that the recorded contact angles of the series of fluorinated siloxane resins were higher than the original values after the friction-annealing progressing.Keywords:ultraviolet (UV) curable coatings;low surface energy materials;fluorinated siloxane resin
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yulan Jian,Mengke Huang,Tianlu Xu,Shuai Chen,Hui Wan,Linkun Xie
The biomimetic construction of superhydrophobic coatings on wood surfaces significantly reduces the water absorption capacity of wood while enhancing its deformation resistance, thereby extending the service life of wooden structures. In this work, a fluorinated silica sol was prepared from alkaline silica sol and 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (PFDMS), and evenly sprayed over the wood surface to effectively produce superhydrophobic/oleophobic wood specimens. The effect of the preparation procedure of fluorinated silica sol on the wettability of the coating was investigated. Acid and alkali corrosion tests were conducted to assess the chemical stability of the superhydrophobic coating, while sandpaper abrasion tests were used to evaluate its mechanical stability. The results showed that with a volume ratio of silica sol to PFDMS of 6:1 and a reaction period of 30 min, the modified wood exhibited excellent superhydrophobicity, with a water contact angle of 157.3° and an oil contact angle of 126.5°. Furthermore, the superhydrophobic coating demonstrated excellent mechanical and chemical durability, along with self-cleaning properties. These findings have significant practical implications for enhancing the performance and longevity of wood.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2021
·Vol. 7
·期 2
·66
·
IF 4.702
Zhongjie Zhu,Lei Jiang,Jia Liu,Sirui He,Wei Shao
A superhydrophobic fluorinated silica functionalized chitosan (F-CS) aerogel is constructed and fabricated by a simple and sustainable method in this study in order to achieve highly efficient gravity-driven oil/water separation performance. The fluorinated silica functionalization invests the pristine hydrophilic chitosan (CS) aerogel with promising superhydrophobicity with a water contact angle of 151.9°. This novel F-CS aerogel possesses three-dimensional structure with high porosity as well as good chemical stability and mechanical compression property. Moreover, it also shows striking self-cleaning performance and great oil adsorption capacity. Most importantly, the as-prepared aerogels exhibits fast and efficient separation of oil/water mixture by the gravity driven process with high separation efficiency. These great performances render the prepared F-CS aerogel a good candidate for oil/water separation in practical industrial application.Keywords:superhydrophobicity;fluorinated silica;chitosan;oil adsorption;oil/water separation
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2022
·Vol. 12
·期 2
·185
·
IF 3.236
Cheng Ke,Yifan Fang,Zheng Zhou,Guohong Wang,Yongjia Liu,Wei Wu,Lishuang Xiao,Mengzhuo Zhang,Haibao Hu,Jianxi Liu
Superhydrophobic surfaces have great potential for self-cleaning, anti-icing, and drag-reducing because of their water repellency property. However, their super-hydrophobicity is destroyed under mechanical abrasion due to the vulnerability of the delicate surface textures. Here, we demonstrate a strategy to create a robust superhydrophobic surface using MXene and fluoridated silica as functional fillers in epoxy resin. The fluoridated silica produces low surface energy, MXene serves as a wear-resistant phase and epoxy resin is the binding matrix. The composite coating demonstrates a self-cleaning effect to remove particles from the superhydrophobic surface by rolling water droplets. Moreover, the coating exhibits excellent mechanical durability by standing abrasion to maintain super-hydrophobicity. The superhydrophobic composite coating has the advantages of low cost and feasibility and has the potential for expandable industrial promotion.Keywords:superhydrophobic;self-cleaning;SiO2;Mxene;epoxy resin;spraying
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FLUORINE CHEMISTRY
·
2018
·
IF 1.879
Yudi Guo,Erqing Zhao,Xiaowei Guo,Dongyan Tang
Hydrophobic fluorinated particulate films were fabricated by coupling Langmuir-Blodgett silica (LB-SiO 2 ) particulate monolayers with fluoroacrylate polymer, and the depth distributions of chemical compositions were studied. The resultant fluorinated particulate films show surface hydrophobic property with water contact angles (WCA) of 123° (300 nm) and 125° (550 nm), which is dominated in Wenzel wetting state. The surface F/C ratio is only 0.09 at 20°, which is slightly higher than 0.07 at 60°. Fitting results of C1s and O1s high-resolution spectra at 20° and 60° indicate the outmost surface is mainly occupied by fluoroacrylate polymer main chains and the ester side chains stretch toward inner surface and thus hydrophobic fluorinated groups in self-assembled fluoroacrylate film cannot efficiently segregate to the outer surface, which results in low surface F/C ratio and surface WCA.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Peng Ye,Jianwen Peng,Fei Xu,Haolei Geng,Yanji Zhu,Huaiyuan Wang
Amphiphobic coatings with the anti-reflective property offer a promising strategy to mitigate the degradation of photovoltaic conversion efficiency in solar cells caused by fouling and reflection of incident light. Despite advancements in developing transparent and liquid-repellent coatings, achieving integration of both properties still poses a significant challenge. In this work, a unique nanostructure coating with extremely low roughness and surface energy is constructed by integrating fluorinated cluster core-shell structured silicon sols (BASSF) into a self-made silicon precursor (S P) using a template-free two-step base/acid-catalyzed reaction. The exceptional anti-fouling performance of the S-P@BASSF coating is a result of the chemical inertness of the polymer and the unique structure of the sol-gel particles. This innovative approach provides a potential solution for fabricating high-performance coatings and materials. The coating is capable of recovering to 97 % of its initial efficiency swiftly, even after severe dust contamination. The coating exhibits remarkable anti-reflective property due to the combination of sol particles with varying refractive indices . The coating also displays high weathering resistance, maintaining contact angles with water (≥105°) and diiodomethane (≥85°) even after prolonged exposure to UV lamps, high temperature and high humidity weather. The results obtained in this study show that nanocomposite coatings via the preparation of smooth, high refractive index and low reflectivity have great potential for outdoor applications such as energy harvesting and optical instruments under wet conditions.
研究领域:
材料科学
·
能源技术
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 17
·e53784
·
IF 3
Zhao Li,Xiue Li,Kunxin Wang,Daguang He,Wenjie Diao,Hui Yang,Guoming Yuan Yuan,Yifei Wu,Jun Shi,Kun Wu
Developing materials with a combination of superior properties such as hydrophobicity and low dielectric is very challenging. This work proposes a design strategy based on the synergistic effect of silicon fluorine to fabricate fluorous silicon materials with excellent hydrophobicity and dielectric properties. Perfluoropolyethyl propionate polysiloxane (PEPS) with different grafting ratios was synthesized by the reaction of polymethylhydrosiloxane (PMHS) and perfluoropolyethyl methacrylate (PPM) hydrosilane. The self-crosslinking perfluoropolyether methyl propionate polysiloxane (PFSP) coating with good hydrophobicity and low dielectric was prepared by further introducing triethoxyvinylsilane (TOVS) into the PEPS and condensing. The fluorine content of two interfaces (film PET and film air) of PFSP-4 film was analyzed by XPS, and it was found that the fluorine content of the film air interface was 46.19% and that of the film PET interface was 17.3%. With the increase of perfluoropolyether content in PFSP, fluorine-containing groups migrate to the coating surface, which is more conducive to enhancing the hydrophobicity of the coating. The results indicate that the film has excellent hydrophobicity with a high water contact angle of up to 117° due to the introduction of PPM. In addition, the dipole moment of perfluoropolyether methyl methacrylate is 2.27, which is lower than that of methyl. Therefore, the introduction of a large number of perfluoropolyether bonds effectively reduces the polarity of the material, which is beneficial to its low dielectric properties. The dielectric constant of PFSP-4 is 2.4, which is 33% lower than that of a fluorine-free silicone coating. The results show that the self-crosslinking perfluoropolyether methacrylate polysiloxane coating has excellent hydrophobicity and low dielectric properties, so it has a feasible application prospect in the electronic industry.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2020
·Vol. 35
·期 9
·1173-1181
·
IF 2.502
Yunge Yu,Fuli Zhang,Yan Liu,Yuansheng Zheng,Binjie Xin,Zhenlin Jiang,Xiaoxiao Peng,Shixin Jin
Electrospun membranes have potential applications in the field of waterproof and breathable textile products. However, challenges still exist to improve the breathability, and waterproof and mechanical properties of these microporous membranes. In this paper, a novel hydrophobic microporous nanofiber membrane was prepared via side-by-side electrospinning of fluorosilane-modified silica nanoparticles (F–SiO2) blended with synthesized polyurethane (PU) solution and composited with the polyacrylonitrile (PAN) solution. To prepare F–SiO2, SiO2 nanoparticles were hydrophobically modified by fluorosilane. Composite nanofiber membranes with different blending ratios of PU(F–SiO2)/PAN were fabricated via side-by-side electrospinning by controlling the extruding speed of two spinnerets. Experimental results indicated that regarding F–SiO2 as hydrophobic inorganic particle can improve the hydrophobic properties of PU nanofiber membrane. The prepared PAN/(F–SiO2/PU) nanofiber microporous membranes exhibit relatively excellent waterproof and mechanical properties as that robust tensile strength (19.5 MPa), preferable water vapor permeability [10.3 kg/(m2 d)], favorable water contact angle (137.2°), and superior mechanical properties. It was believed that the reinforced PAN/(F–SiO2/PU) nanofibrous composite membranes have potential applications in chemical protective clothing, army combat uniforms, self-cleaning materials, and other medical products.
研究领域:
材料科学
·
纺织工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Nan Zheng,Xuan Zhang,Xin Min,Jie Liu,Wenge Li,Xiaohui Ji
A novel robust and flexible superhydrophobic fluoropropyl methylsiloxane-dimethylsiloxane multi-block copolymer containing methacryloxyl group was synthesized via ring-opening polymerization, followed by macromolecular modification using 3-(trimethoxsilyl) propyl methacrylate (TMPMA). The propionyloxy group of MAc(PTFMS- alt -PDMS) could be crosslinked under UV irradiation , and its silicon methoxy group (-SiOCH 3 ) was simultaneously condensed under moisture ambient, so as to acquire both higher crosslink density and adhesion strength duo to the dual-curing mode. After coating and curing MAc(PTFMS- alt -PDMS) on the surface of cotton fabric, a robust superhydrophobic elastomer coating was obtained. The elastomer exhibited excellent mechanical properties with a tensile strength >4.0 Mpa and an elongation at break >300%. Moreover, the elastomer exhibited superhydrophobic properties (contact angle CA > 150 o ) and good adhesion properties (shear strength >3.7 Mpa) on various inorganic and organic substrates such as steel, glass, paper, and polyethylene (PE) films, with the assistant of the hydrophobic silica particles. The excellent flexibility and adhesive strength of the MAc(PTFMS- alt -PDMS) allowed a PE film to be bent at a large angle (120 o ). The results obtained here demonstrate that this material has good application prospects where flexible superhydrophobic coatings are desired.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shuhua Tu,Min Chen,Limin Wu
Although perovskite quantum dots (PQDs) have fascinating optical performances and wide uses in light-emitting diodes (LEDs), laser and photodetectors etc., their commercialization and practical applications are seriously hampered by the poor stability against moisture or water, heat, photo-oxidation and ion exchange. Herein, we report a dually encapsulating strategy of PQDs in fluorinated silica (FSiO 2 ) and porous polydimethylsiloxane (PPDMS) foam. Owning to the superhydrophobic and thermal insulation layers, the dually-encapsulated CsPbBr 3 QDs are very stable in the moisture, heat, and irradiation environment and can be long-term stored in air environment for at least 3 months without losing their optical properties. Moreover, the FSiO 2 -coated CsPbBr 3 QDs can be easily released out from PPDMS foam and applied in white LEDs to display pure white emission with ideal CIE (Commission Internationale de L’Eclairage 1931) chromaticity coordinate of (0.33, 0.33). This novel dual-encapsulation strategy through combination of solid airtight shells and thermally insulated porous materials provides a new idea and solution to improve the stability of perovskite quantum dots.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2022
·
IF 8.589
Lei Wei,Zhaoqing Jin,Jianhao Lu,Yang Guo,Zilong Wang,Gaoping Cao,Jingyi Qiu,Anbang Wang,Weikun Wang
Lithium (Li) metal anode holds great promise for high-energy-density rechargeable batteries. However, it suffers from the Li dendrites growth and uncontrollable side reactions with electrolyte due to the unstable solid electrolyte interphase (SEI) layer. Herein, we propose a facile strategy for the in-situ fabricate of organic-inorganic composite artificial SEI layers on Li surfaces, which consist of organic fluorinated siloxane and inorganic LiF-rich phases. The hybrid artificial SEI endows high mechanical strength (13.1 GPa) and Li + transfer number (0.62). Such robust SEI protective layers can not only guide uniform nucleation and deposition of Li metal by facilitating uniform Li-ion distribution, but also prevent unfavourable side reactions. Accordingly, the protected metallic lithium anode (PMTFPS-Li) anode enables stable Li plating/stripping performance in symmetric cells for more than 300 h at 4 mA ·h/cm 2 under a high areal capacity of 4 mA/cm 2 . Moreover, the PMTFPS-Li/S cells could maintain more than 300 stable cycles at 0.5C and the PMTFPS-Li/LFP cells present excellent cycling performance (400 cycles at 1C) and enhanced rate capability (110.4 mA·h/g at 3 C). This work will inspire the design of artificial SEI on Li anodes for advanced Li metal batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2021
·Vol. 23
·期 46
·26219-26226
·
IF 3.676
Fang-Yan Du,Rui-Chao Chen,Junjin Che,Wei-Di Xu,Xiu Liu,Yin-Tao Li,Yuan-Lin Zhou,Jinkai Yuan,Quan-Ping Zhang
Integrating high-loading dielectric nanoparticles into polar polymer matrices potentially can profit the intrinsic polarization of each phase and allow for greatly enhanced dielectric properties in polymer nanocomposites. It is however challenging to achieve desirable highly filled polar polymer composites because of the lack of efficient approaches to disperse nanoparticles and maintain interfacial compatibility. Here, we report a versatile route to fabricate highly filled barium titanate/fluorinated silicone rubber (BT/FSR) nanocomposites by “thiol–ene click” and isostatic pressing techniques. The loaded BT nanoparticles (from 82 wt% to 90 wt%) are chemically bonded with FSR in the nanocomposites. The existence of the polar group (–CH2CF3) of the polymer matrix does not affect the uniform dispersion of the nanoparticles or the good interfacial compatibility. The 90 wt% BT/FSR nanocomposite shows the highest dielectric constant of 57.8 at 103 Hz, while the loss tangent can be kept below 0.03. Besides, BT/FSR nanocomposites display higher breakdown strength than BT/SR nanocomposites. This work offers a facile strategy towards superior dielectric properties of polymer nanocomposites.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）