POLYMER SCIENCE SERIES B
·
2024
·
IF 1
Yawen Guo,Zhao Lielun,Kang Tiantai,Jiang Yan,Zhang Haobin,Zhang Hongwen
Abstract In this paper, TiO 2 particles submicron were prepared by sol-gel method and modified with 3-aminopropyl triethoxysilane (KH550) after coating SiO 2 on its surface. Subsequently, combined with the breath figure method (BF), slippery liquid-infused porous surfaces (SLIPS) of polyimide composites were prepared by a two-step method using TiO 2 /SiO 2 particles, amino terminated polysiloxanes (APT-PDMS), 2,2'-bis[4-(4-aminophenoxyphenyl)]propane (BAPP) and 1,2,4,5-cyclohexanetetracarboxylic dianhydride (HPMDA) as the raw materials. The compositions and properties of the composites were characterized by infrared spectroscopy, nuclear magnetic resonance and thermal weight loss, respectively. The apparent morphology of the porous membrane was observed by scanning electron microscopy, and the hydrophobic properties of the porous membrane were investigated before and after the infilling of the silicone oil by contact angle tester. The results show that the hydrophobicity of the porous substrate prepared when the content of TiO 2 /SiO 2 particles is 15% and the concentration of composite material is 20 mg/mL is the best, and the sliding angle of the oil-filled SLIPS is 2° at the minimum. The SLIPS owns good stability, self-cleaning, and anti-freezing properties and so on.
研究领域:
材料科学
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表面化学
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DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 17
·2200687
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IF 10.05
Shuhua Chen,Xinnan Mao,Qixuan Zhong,Qi Pan,Jun Liu,Jie Fu,Di Yang,Jinxing Chen,Lu Wang,Qiao Zhang,Muhan Cao
Heterostructures integrated by diverse material featuring nanocrystals (NCs) tunable properties and functions are of great interest. However, to rationally design and precisely control the heterostructures in multiple shapes still remains a tremendous challenge. In this work, the nucleation of SiO 2 nanoparticles is manipulated via a kinetics-controlled water–hexane interfacial reaction system to construct Cs 3 Cu 2 I 5 /SiO 2 heterostructures, which can be well controlled in Janus and patchy morphology. In this interfacial reaction, the evolution of Cs 3 Cu 2 I 5 NCs and the intrinsic formation mechanism of the heterostructures are investigated. It is observed that the Cs 3 Cu 2 I 5 NCs on the interface undergo a morphology transformation driven by ligand loss and exposed facets evolution. Increased wettability between Cs 3 Cu 2 I 5 and SiO 2 favors the formation of Cs 3 Cu 2 I 5 /SiO 2 heterostructures. The key to this strategy is to break the rule of thermodynamic domination in reaction by kinetics manipulation when constructing the patchy heterostructure. To be noted, an increased stability is conferred on the resultant heterostructure product compared to naked perovskite NCs. This work enables to better control the complicated heterostructure configurations and understand their formation mechanism.
研究领域:
材料科学
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纳米技术
·
化学工程
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DOI
高影响因子
ChemCatChem
·
2018
·Vol. 11
·期 3
·1123-1130
·
IF 4.674
Xiao-Li Li,Guo-Hui Yang,Meng Zhang,Xiao-Feng Gao,Hong-Juan Xie,Yun-Xing Bai,Ying-Quan Wu,Jun-Xuan Pan,Yi-Sheng Tan
Graphical Tuning selectivity : Cu/SiO 2 was prepared by ammonia evaporation and used as catalyst for the direct synthesis of ethanol from CO hydrogenation. Both the Cu + /(Cu + +Cu 0 ) values and copper crystallite sizes had significant effects on the selectivity towards ethanol. Cu/SiO 2 catalyst was prepared by the ammonia evaporation method for the direct synthesis of ethanol from CO hydrogenation. The catalyst exhibited the initial ethanol selectivity as high as 40.0 wt %, which dramatically decreased from 40.0 to 9.6 wt % on the stream of 50 h. XRD, XPS, TEM and N 2 O titration techniques were employed to elucidate the ethanol selectivity change and catalyst structure evolution during reaction process. The experiment and characterization results indicated that both Cu + /(Cu + +Cu 0 ) value and copper crystallite size had great effects on the ethanol selectivity. During the initial 38 h, the ethanol selectivity obviously decreased from 40.0 to 18.2 wt %, and Cu + /(Cu + +Cu 0 ) value on the catalyst surface rapidly dropped from 0.67 to 0.39, while the copper crystallite size remained almost unchanged. However, during the reaction period of 38–50 h, the Cu + /(Cu + +Cu 0 ) value possessed no distinct change, but a further decrease in ethanol selectivity and a rapid aggregation in Cu particles were observed simultaneously. The present systematic investigation demonstrated that the decrease of Cu + /(Cu + +Cu 0 ) value was the main factor for the loss of ethanol selectivity during the initial 38 h, whereas the rapid growth of Cu particles during the reaction period of 38–50 h were mainly contributed to the further decline of ethanol selectivity.
研究领域:
催化化学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Nianbing Zhong,Ming Chen,Yihao Luo,Zhengkun Wang,Xin Xin,Bruce E. Rittmann
We present a novel UV–visible-light photocatalytic optical hollow-fiber in which a hollow optical fiber (HOF) and TiO 2 -based composite are coupled for enhancement of photocatalytic activity toward degradation of 4-chlorophenol (4-CP). A HOF was coated with a TiO 2 -based composite composed of Er 3+ :YAlO 3 /SiO 2 /TiO 2 (EYST) and acting as the photocatalytic element. The EYST coating showed good light-inducing capacity at the fiber-coating interface and high photocatalytic activity driven by UV–visible light. The photocatalytic activity of the fabricated photocatalytic HOFs was investigated for degradation of 4-CP in aqueous solution in the wavelength spectrum of 360–780 nm. Examined were the effects of the EYST coating gradient and reactor operating conditions (pH and temperature) on the degradation of 4-CP. The EYST-coated HOF significantly enhanced the 4-CP degradation, dechlorination, and mineralization, compared to pure TiO 2 -coated HOF and EYST-coated solid optical fibers. Specifically, high photocatalytic activity was obtained when the EYST coating thicknesses at the HOF’s incident end and HOF’s hemispherical end were 10 and 160 μm, the pH was 6.0, and temperature was 55 °C.
研究领域:
环境科学
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光学工程
·
化学工程
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DOI
高影响因子
POLYMER TESTING
·
2019
·
IF 2.943
Weibin Jiang,Xiongfei Jin,Huan Li,Shiyu Zhang,Tao Zhou,Huasheng Xie
Silicone-acrylic resin (SAR) was prepared from acrylic monomers and silicone prepolymer by the free radical solution polymerization , and then mixed TiO 2 and SiO 2 nanoparticles modified by KH570 were added to prepare nanocomposite coating . Thermogravimetric analysis and contact angle measurements showed that the acrylic resin modified by silicone prepolymer exhibited an improved thermostability and a better hydrophobicity compared with the unmodified sample. The adding of nanoparticles further increased the hydrophobicity. The contact angle of modified silicone-acrylic resin with mixed TiO 2 and SiO 2 nanoparticles of 3 wt% is the highest, 108.4°. The UV resistance and weather resistance of the modified silicone-acrylic resin are significantly improved. It was also found through electrochemical impedance spectroscopy that the corrosion resistance was significantly improved by the addition of mixed TiO 2 and SiO 2 nanoparticles. Modified silicone-acrylic resin with mixed TiO 2 and SiO 2 nanoparticles of 3 wt% and 5 wt% coating system maintains an excellent anticorrosion performance (coating resistance R c of more than 10 9 Ω cm 2 ) even at 3.5% NaCl electrolyte medium till to 1800 h.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Jiali You,Tao Yang,Dandan Feng,Zhihong Li
Corundum abrasives with plate-like grains were fabricated by a two-step sintering technique using the solution-based process with the addition of the ternary compound additive Na 3 AlF 6 -CaO-SiO 2 . The two-step sintering method showed obvious advantages over conventional sintering methods in promoting sample densification, suppressing grain growth, and homogenizing the microstructure of the corundum abrasives. The sample doped with 2.5 wt% Na 3 AlF 6 and 4 wt% CaO + SiO 2 in the molar ratio of 1:1 possessed a relative density of 99.3%, average grain size of 0.54 µm, and single-particle compressive strength of 49 N. The introduction of seeds reduced the temperature of θ- to α-Al 2 O 3 phase transformation. The relationship between the microstructure and the mechanical properties of the abrasives was also discussed.
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Zhenying Liu,Shouwu Huang,Tingting Pan,Shaofeng Dong,Zihang Wang,Moquan Yan,Yin Liu
Ceramic aerogels exhibit significant advantages for thermal insulation applications. However, their practical utilization is hindered by high manufacturing costs, inherent brittleness, and inadequate thermal resistance. In this study, inspired by the dual-network architecture of the human skin dermis, we developed a biomimetic aerogel-like ceramic thermal insulator (ACSM) via a scalable electrospinning and sol–gel strategy. The structural design integrates rigid alumina nanofibers with flexible carbon fibers, which are consolidated into a stable three-dimensional porous framework via nanoscale silica welding. This distinctive fibrous network imparts the material with a low bulk density (0.1107–0.1217 g/cm3), commendable compressive strength (0.31–1.76 MPa), and ultralow thermal conductivity (0.0512–0.0624 W/(m·K)). Furthermore, the three-dimensional mesh structure of the ACSM remains intact after heat treatment at 800 °C in a nitrogen atmosphere, confirming its exceptional thermal stability. Importantly, the material’s comprehensive performance can be precisely tuned by modulating the relative content of the two fiber components. This study establishes a robust foundation for the future development of advanced nanostructured biomimetic thermal insulation materials, with potential applications in aerospace, energy-efficient buildings, and thermal management.
研究领域:
材料科学
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陶瓷
·
热工工程
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纳米材料
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仿生学
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产品关联
DOI
高影响因子
Journal of Nanoelectronics and Optoelectronics
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2021
·Vol. 16
·期 2
·208-212
·
IF 0.961
Liu Zhong-Peng,Song Si-Nan,Zhang Mu
Recently, superhydrophobic surface on various type of substrates have attracted much attentions in electronics field. In this work, the classic Stöber method was used to prepare spherical silica particles with different particle sizes by adding different amounts of electrolyte
(potassium chloride), giving rise to size distribution ranging from 300 nm to 2.55 yitm. Herein we constructed a micro-nano lotus-like structure in a facile way, achieving a superhydrophobic surface with using any Fluorine related chemicals. In the sense, the silica particles modified with
HMDS were sprayed to prepare hydrophobic surface with contact angle up to 152.96° by increasing the frequency of sprays.
研究领域:
材料科学
·
表面工程学
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DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.2
Bo Ge,Lu Han,Bo Gao,Tingxiao Zhang,Xiuling Li,Xiaotao Zhu,Xipeng Pu,Wenzhi Li
A mesoporous SiO2-TiO2-x composite without any modification was obtained to separate oil-in-water and water-in-oil emulsions solely by gravity. To simulate the actual pollution treatment process in sewage treatment plants, adsorption and degradation properties were studied after the initial emulsion separation. The research result indicates that the reported mesoporous SiO2 can be employed as an excellent absorbent and catalyst carrier. After light irradiating for 120 min, the degradation efficiency of SiO2-TiO2-4 for Rhodamine B, methyl orange, methylene blue, and ciprofloxacin hydrochloride reaches 99.3%, 91.5%, 98.7%, and 96.2%, respectively.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 7
·1-13
·
IF 2.02
Liu Mei,Chen Qian,Wang Sheng,Bai Linfeng,Sang Min,Jiang Wanquan,Xuan Shouhu,Gong Xinglong
We develop a modified method to improve the rheological performance of SiO 2 -based shear thickening fluid (STF). Directly adding surfactant into STF is the most common method to improve the rheological performance of SiO 2 -based STF. However, the final viscosity increases quickly with the increase of shear rate, which is against for the practical applications. In this work, SiO 2 nanospheres are firstly modified by PVP K30 through an ethanol refluxing method and the modified SiO 2 nanospheres are used to prepare PVP@SiO 2 -STF. Compared with the unmodified SiO 2 based STF (SiO 2 -STF), the PVP@SiO 2 -STF presents an obvious increase of shear thickening (ST) effects and the maximum viscosity increases by 7 times and the critical shear rates decrease about 10 times approximately. A reasonable explanation is proposed to interpret the influence of the modification methods on the rheological properties of STF. This work provides a new way to control the shear thickening behavior and also contributes to understand the mechanism of ST effect, which has an important significance to develop controllable STF.
Figure PVP immobilized SiO 2 based shear thickening fluid shows a dramatic improvement in shear thickening behavior (a, b, and c) and the illustration of the enhanced mechanism of shear thickening (d).
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 34
·期 5
·055101
·
IF 3.953
Yijun Wu,Zhiqiang Sun,Jinfeng Song,Liufang Mo,Xiaochen Wang,Hanhan Liu,Yunfeng Ma
A targeted drug delivery system was developed to accumulate specific drugs around tumor cells based on the redox, temperature, and enzyme synergistic responses of mesoporous silica nanoparticles. Mesoporous silica nanoparticles (MSN-NH2) and Doxorubicin (DOX) for tumor therapy were prepared and loaded into the pores of MSN- NH2 to obtain DOX@MSN(DM NPs). Hyaluronic acid (HA) was used as the backbone and disulfide bond was used as the linker arm to graft carboxylated poly (N-isopropylacrylamide)(PNIPAAm-COOH) to synthesize the macromolecular copolymer (HA-SS-PNIPAAm), which was modified to DM NPs with capped ends to obtain the nano-delivery system DOX@MSN@HA-SS-PNIPAAm(DMHSP NPs), and a control formulation was prepared in a similar way. DMHSP NPs specifically entered tumor cells via CD44 receptor-mediated endocytosis; the high GSH concentration (10 mM) of cells severed the disulfide bonds, the hyaluronidase sheared the capped HA to open the pores, and increased tumor microenvironment temperature due to immune response can trigger the release of encapsulated drugs in thermosensitive materials. In vitro and in vivo antitumor and hemolysis assays showed that DMHSP NPs can accurately target hepatocellular carcinoma cells with a good safety profile and have synergistic effects, which meant DMHSP NPs had great potential for tumor therapy.
研究领域:
纳米技术
·
药学
·
癌症研究
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Hao Han,Jinyu Dai,Zhiqiang Shi,Xiaohong Zhang,Jun Song,Ming-Hua Xie,Xiu-Li Yang
Volatile organic compounds (VOCs) threaten both human health and the environment. Catalytic oxidation is an effective purification method, yet its efficiency is often compromised by water vapor present in industrial exhausts. To address the persistent issues of active site deactivation and restricted mass transfer under humid conditions, a hierarchical SiO 2 NF@MnO 2 catalyst was fabricated via combined electrospinning and hydrothermal synthesis. The hydrophobic SiO 2 nanofibers, with surface hydroxyl density tuned by calcination, effectively suppressed water adsorption, while the in situ-grown ultrathin MnO 2 nanosheets (<7 nm) provided abundant edge-active sites for toluene activation. Water resistance tests confirmed the optimized competitive adsorption between water and toluene on SiO 2 NF500@MnO 2 , sustaining over 73% toluene conversion at 230°C under 5 vol% H 2 O for 50 h. This work provides a design paradigm for water-resistant VOCs catalysts and advances the rational design of robust environmental catalysts.
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高影响因子
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