PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Xue Fu,Shuyan Xu
Superhydrophobic coatings, inspired by lotus leaves, have gained significant interest due to their multifunctional properties. However, their mechanical wear resistance is often inadequate, resulting in a limited lifespan. This study aims to create a wear-resistant superhydrophobic composite coating using epoxy resin (EP) as a binder, along with SiO 2 modified by hexadecyltrimethoxysilane (HDTMS) and cellulose nanofibers (CNF) modified by KH570 to enhance performance synergistically. The preparation method is environmentally friendly and does not involve fluorine chemicals. A simple and efficient one-step spraying technique is employed to create a micro-nano hierarchical structure on the substrate surface. SiO 2 contributes to surface roughness, CNF serves as a toughening agent to form a three-dimensional network, and EP provides strong adhesion. This composite structure significantly improves the mechanical durability of the coating while preserving excellent superhydrophobic properties. The coating is compatible with various substrates and retains good hydrophobicity even after extensive abrasion and tape peeling. Additionally, the superhydrophobic coating demonstrates outstanding anti-fouling and self-cleaning capabilities, resistance to acids and bases, and strong adhesion. We believe this research offers innovative approaches for developing fluorine-free, wear-resistant superhydrophobic coatings.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
高分子科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yangjie Zhong,Chengming Tang,Jidong Sun,Yafeng Zhang,Jiaxin Yu
Dielectric materials with superior dielectric properties are pivotal for enhancing the performance of electrowetting-on-dielectric (EWOD) devices. In this work, MWCNTs@SiO2 core–shell-structured fillers were fabricated by coating multiwalled carbon nanotubes (MWCNTs) with a uniform SiO2 outer layer. This innovative core–shell structure was incorporated into a poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) (P(VDF-TrFE-CTFE)) and poly(methyl methacrylate) (PMMA) organic matrix to fabricate composite films with enhanced dielectric properties. The incorporation of core–shell fillers significantly enhanced the microcapacitor effect and Maxwell–Wagner–Sillars interface polarization. At a low filler loading of 4 wt %, the composite achieved a high dielectric constant of 25.4 (at 100 Hz), representing a 108.2% enhancement compared to the pristine polymer matrix, while maintaining a low dielectric loss as low as 0.05. Furthermore, the SiO2 shell effectively mitigated inhomogeneous electric field distribution induced by dielectric constant mismatch, reducing field distortion and consequently enhancing the breakdown strength. Notably, under a DC voltage below 50 V, a high contact angle modulation range of 38.3° was achieved, representing a 151.97% enhancement compared to the pristine polymer matrix. These findings provide a new strategy for developing high-performance dielectric materials for EWOD applications.
研究领域:
材料科学
·
聚合物复合材料
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介电材料
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纳米技术
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Muyang Gu,Yaoqi Huang,Kaidi Bao,Liuyi Wang,Ting Huang,Yuanyuan Li,Xiaomin Cheng
Hydrated salt phase change materials have great application value in passive thermoregulation fields due to their low phase change temperature . However, their practical applications are limited by problems such as leakage and phase separation, which require urgent attention. To solve these problems, in this study, a W/O emulsion system was constructed by sol-gel method, and microencapsulated composites with graphene oxide (GO) as the thermally conductive reinforcing phase, silica as the shell material, and calcium chloride hexahydrate (CaCl 2 ·6H 2 O, CCH) as the core material was prepared. The regular spherical SiO 2 shell layer effectively reduces the possibility of leakage of the core material. The excellent thermal conductivity of GO increases the thermal conductivity of the composites by about 41.14 % compared with that of pure CCH and maintains a latent heat of >114.1 J/g. The encapsulation of SiO 2 and the introduction of GO improve the thermal cycling stability of the composites. After 150 thermal cycles, the composites still had 96.5 % (110.1 J/g) latent heat and 99.6 % (0.708 W·m −1 ·K −1 ) thermal conductivity. The GO/SiO 2 @CCH microencapsulated composites had good temperature regulation. This study provides a promising solution for preparing hydrated salt-based shape-stabilized composites and expands their applications in construction and other fields.
研究领域:
材料科学
·
热能工程
·
能源存储
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2016
·
IF 4.055
M.M. Mikhailov,V.V. Neshchimenko,Chundong Li
This study carried out on the diffuse reflective spectra of zinc oxide modified by Al 2 O 3 , ZrO 2 , SiO 2 , CeO 2 , TiO 2 and Y 2 O 3 nanoparticles . It was established that during the modification are formed the solid solutions between zinc oxide and nanopowder as Al 2 ZnO 4 , ZrZnO 3 , Zn 2 SiO 4 , Ce x Zn (1−х) О y , Zn 2 TiO 4 , Y x Zn (1−x) O y . The diffuse reflection spectra of the modified powders are changed in the UV and visible range with a maximum at 395 nm. This band is determined by the intrinsic point defects in the crystal lattice of ZnO as interstitial zinc ions and zinc vacancy. In the IR region also recorded changes due to the absorption of OH-groups adsorbed on the surface modified zinc oxide.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhixun Wei,Yang Li,Fei Chen,Linghua Kong,Chunhong Shi,Congju Li
In this study, a stepped-pore adsorbent was synthesized via a green in-situ method using low-cost iron ore tailings (IOT) as the silicon source. The formation mechanism was elucidated through comprehensive characterization of the material’s phase composition, microstructure, pore properties, and surface functional groups. The effects of roasting temperature, initial ammonia concentration, pH, and coexisting cations on adsorption efficiency were systematically investigated. Kinetic, isotherm, and thermodynamic analyses revealed a combined physisorption and chemisorption mechanism, with a maximum adsorption capacity of 28.72 mg/g. The process was determined to be spontaneous and entropy-driven. The material retained significant adsorption capacity after regeneration and in real wastewater tests. The adsorption mechanism primarily involved electrostatic attraction, hydrogen bonding, and cation exchange. The SI-6 adsorbent demonstrates high cost-effectiveness, excellent environmental compatibility, and strong adsorption performance, showing great potential for environmental remediation and sustainable resource utilization.
研究领域:
环境科学
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材料科学
·
水处理
·
资源可持续利用
·
吸附技术
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2020
·
IF 2.187
Xiaoyu Sun,Lei Li,Xiaozhuang Xu,Guanyu Song,Jielei Tu,Pingyuan Yan,Weinan Zhang,Kai Hu
Reflection from the surface of solar panels is important factor to limit the efficiency of all of photovoltaic devices . Antireflective coatings (ARCs) can significantly reduce surface reflections and improve photovoltaic module efficiency. But, ARCs on solar glass, used in photovoltaic (PV) modules, usually located in terrible environments, which demands that ARCs must hinder moisture penetration , abrasion damage, and dirt accumulation. In this study, the films with highly antireflective properties that maintains a high durability and hydrophobic were prepared through a simple sol–gel method by using PTFE (Polytetrafluoroethylene) modified. The average transmittance of glass with ARCs was 97.86 % at 400–800 nm, which was an increase of 7.86 % compared to the bare glass. X-ray Diffraction (XRD), Fourier Transform Infrared spectrometer (FT-IR), field emission scanning electron microscope (FE-SEM), ellipsometer , atomic force microscope (AFM), UV–vis-NIR spectrophotometer and water contact angle analyzer were used to measure the surface composition, morphology, refractive index , surface roughness , optical and hydrophilic properties of the coatings. The results revealed that the deposition of PTFE modified SiO 2 coating on the glass substrate had a significant enhance on the antireflection, abrasion-resistance and hydrophobic property.
研究领域:
材料科学
·
太阳能
·
涂层技术
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jia Deng,Shaoge Fu,Yifan Zhong,Ming Jiang,Tao Chen,Haili Zhao
Photonic crystal (PC) hydrogels with unique micro/nanostructures have excellent prospects in many fields, such as sensing, displays, anticounterfeiting, information encryption, and adaptive camouflage. Herein, magnetic core–shell Fe3O4/SiO2 nanoparticles with a controlled size were synthesized, followed by PC hydrogels of arbitrary structures that were fabricated via the magnetically inducing self-assembly of magnetic nanoparticles in the poly(ethylene glycol) diacrylate (PEGDA) pregel solution and a subsequent digital micromirror device (DMD)-based UV polymerization process. By controlling the size of nanoparticles and magnetic field intensity, various PC hydrogel patterns with tunable structural colors were fabricated. Combining magnetic field control with DMD-based light modulation, high-throughput preparation of structural color PC hydrogels was achieved. Furthermore, the Fe3O4/SiO2 nanoparticles were assembled into poly(2-hydroxyethyl methacrylate) (PHEMA) with solvent responsiveness. Interestingly, the obtained PC hydrogels could swell in ethanol, resulting in a change in the structural color. Meaningfully, a dual-component PC hydrogel consisting of a PEGDA pattern and a PHEMA background was fabricated, and the invisible pattern in the initial state could be displayed and hidden through cyclic exposure to ethanol and ethylene glycol. The presented strategy for constructing the PC hydrogels from Fe3O4/SiO2 nanoparticles could provide valuable insights for the development of intelligent structural color materials, which exhibit significant potential in applications such as information storage, visual sensing, and anticounterfeiting.
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
·
防伪技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Jiahui Lin,Jintao Huang,Zhanhu Guo,Ben Bin Xu,Yan Cao,Juanna Ren,Hua Hou,Yongshuang Xiao,Mustafa Elashiry,Zeinhom M. El-Bahy,Yonggang Min
With the rapid development of electronic industry, it's pressing to develop multifunctional electromagnetic interference (EMI) shielding materials to ensure the stable operation of electronic devices. Herein, multilayered flexible PEG@PAN/MXene (Ti 3 C 2 T x )/PVDF@SiO 2 (PMF) composite film has been constructed from the level of microstructure design via coaxial electrospinning, coating spraying, and uniaxial electrospinning strategies. Benefiting from the effective encapsulation for PEG and high conductivity of MXene coating, PEG@PAN/MXene composite film with MXene coating loading density of 0.70 mg cm −2 exhibits high thermal energy storage density of 120.77 J g −1 and great EMI shielding performance (EMI SE of 34.409 dB and SSE of 49.086 dB cm 3 g −1 ) in X-band (8–12 GHz). Therefore, this advanced composite film can not only help electronic devices prevent the influence of electromagnetic pollution in the X-band but also play an important role in electronic device thermal management. Additionally, the deposition of nano PVDF@SiO 2 fibers (289 ± 128 nm) endowed the PMF composite film with great hydrophobic properties (water contact angle of 126.5°) to ensure the stable working of hydrophilic MXene coating, thereby breaks the limitation of humid application environments. The finding paves a new way for the development of novel multifunctional EMI shielding composite films for electronic devices.
研究领域:
材料科学
·
电气工程
·
纳米技术
·
高分子科学
·
热工程
·
电磁兼容
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 91
·49866-49872
·
IF 3.708
Zhihui Fang,Duanguang Yang,Yong Gao,Huaming Li
In this study, we reported a novel, facile, Pickering emulsion-templating method to prepare massage ball-like, hollow-structured Au/SiO2 microspheres. Firstly, oil-in-water Pickering emulsions stabilized by Au@poly(ethylene oxide)-b-poly(4-vinylpyridine) (Au@PEO-b-P4VP) hybrid emulsifier micelles, which were formed by a P4VP/Au complex induced self-assembly process, were generated. Then hollow Au/SiO2 hybrid microspheres with nano-/submicro-sized protrusions on their shells, termed as massage ball-like microspheres, were successfully synthesized using the generated Pickering emulsion as template, in which the P4VP catalyzed hydrolysis and condensation of tetraethoxysilane (TEOS) in the TEOS/n-decanol mixed oil phase occurred at the oil/water interface. As a result, a continuous SiO2 shell was formed. The uneven adsorption of polydisperse hybrid micelles at the oil/water interface as well as the volume shrinkage of the oil phase during the early hydrolysis and condensation of TEOS facilitated the formation of protrusions on the shell surface. After further removal of the polymer components embedded in the shell by calcination, hollow Au/SiO2 hybrid microspheres with micropore/mesopore bimodal porous shells were produced. The as-prepared Au/SiO2 hybrid microspheres were applied as catalysts for the reduction of p-nitrophenol with NaBH4, showing a high catalytic activity with a good recyclability owing to the large specific areas, the easily accessible Au active centres, and the enhanced mass transportation.
研究领域:
材料科学
·
化学工程
·
纳米技术
·
催化
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 3
·1216-1225
·
IF 3.925
Anqi Niu,Hang Xu,Qinlin Yuan,Fengmin Wu,Xuefeng Wei
Lewis acidic ionic liquid-loaded Fe3O4@SiO2 magnetic catalytic microspheres were prepared. When coupled with persulfate, the microspheres catalytically oxidized and removed dibenzothiophene (DBT) from octane. The microspheres used for catalytic desulfurization were characterized and analyzed by SEM, TEM, FT-IR, VSM, and TG-DTA. The results indicated that the prepared catalytic desulfurization microspheres had a uniform particle size distribution, an overall diameter of 200 nm, and a core diameter of Fe3O4 of about 180 nm. The saturation magnetization of the catalytic desulfurization microspheres was 39.8 emug−1, which allowed them to be rapidly magnetically separated. The optimal experimental conditions were 1.5 g catalyst, 1.2 g PMS (20%) oxidant, 30 °C, an initial sulfur content of 500 ppm, 6.0 g octane, and 3.0 g acetonitrile. Under these conditions, the desulfurization rate reached 98.5% after 25 min, which decreased by about 10% after five recycles. GC-MS analysis indicated the oxidation product was dibenzothiophene sulfone (DBTO2). In the desulfurization mechanism, DBT was first extracted by acetonitrile. Then, in the acetonitrile phase, Co2+ catalyzed hydrogen persulfate to form active oxygen atoms that oxidized DBT and eventually formed DBTO2.
研究领域:
化学工程
·
环境科学
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Yanna Lin,Yulong Xu,Yanzhi Xing,Nazhen Liu,Xuwei Chen
A three-dimensional ordered macroporous composite (3DOM SiO2@ZIF-8-TBA) was fabricated via the in situ growth of metal–organic framework ZIF-8 (∼50 nm) on the surface of macroporous SiO2 (pore size of ∼250 nm) and the subsequent functionalization with a thrombin aptamer. The obtained 3DOM SiO2@ZIF-8-TBA composite has been proven to be a potential protein-enriching adsorbent, which exhibits high selectivity toward the adsorption of thrombin due to the specific conformation between the aptamer and thrombin. The adsorption behavior of thrombin onto the 3DOM SiO2@ZIF-8-TBA composite conforms to the Langmuir adsorption model, resulting in a superior adsorption capacity of 40.9 U mg–1, contributed by the ordered macroporous structure. The retained thrombin could be readily recovered by 1.0% NH3·H2O (m/v) with a recovery of 92.3%. Circular dichroism spectra illustrate that the 3DOM SiO2@ZIF-8-TBA composite-based adsorption/desorption processes have no influence on thrombin conformation. The application of the 3DOM SiO2@ZIF-8-TBA composite in separating thrombin from human serum has been verified; fibrin production tests prove that the activity of recovered thrombin is well retained.
研究领域:
材料科学
·
生物化学
·
纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Xiao Zhu,Shasha Feng,Shuaifei Zhao,Feng Zhang,Chong Xu,Min Hu,Zhaoxiang Zhong,Weihong Xing
Polytetrafluoroethylene (PTFE) nanofiber membranes have been widely used in various air purification applications attributed to their excellent thermal and chemical stabilities. However, in oily fume purification, oil aerosols can easily permeate through the oleophilic membrane, which may lead to pore blocking, and increased filtration resistance and energy consumption, finally reducing the filtration efficiency and lifespan of the membrane. Herein, we report a hierarchical SiO 2 @PTFE nanofiber membrane by coaxial electrospinning of SiO 2 nanoparticle dispersion as the shell spinning solution and PTFE emulsion as the core spinning solution, followed by in-situ surface grafting of 1H,1H,2H,2H-perfluorooctyltrimethoxysilane. The prepared amphiphobic membrane has both superhydrophobicity and oleophobicity with the water and oil contact angles of 173° and 134°, respectively. It possesses uniform pore structures , high gas permeability (697 m 3 m −2 h −1 kPa −1 ), excellent oily fume filtration efficiency (˃99%), as well as a low pressure drop (2.5 kPa) during 60-min filtration. Furthermore, our perfluorinated amphiphobic SiO 2 @PTFE nanofiber membrane exhibits good reusable and stable properties. This work opens a versatile approach to design efficient functionalized membranes in the field of oily fume purification.
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）