COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Zhonglong Wang,Aibi Yang,Xinyu Tan,Yiteng Tu,Sydney Sabin,Peng Xiang,Man Wang,Runhua Guo,Xiaobo Chen
Superhydrophobic (SHP) coatings have been reported with many promising applications using various nano-micro structures with surfactants of low surface energies. However, many SHP coatings have poor durability, largely limiting their practical importance. In this study, a durable SHP coating is demonstrated with a novel veil-over-sprout micro-nano structure of silica nano particles (SNP) and poly(methyl methacrylate) (PMMA). This coating displays a large water contact angle (WCA) of 168.0° and a small sliding angle (SA) of less than 1.0°. Excellent abrasion resistance is demonstrated with excellent superhydrophobicity (WCA = 159.0°) after consecutive tests with sandpaper, high-density water flow and fine sand impact. An excellent self-healing function has been achieved with this SHP coating after stored at room temperature , recovering its remarkable superhydrophobicity. Outstanding resistance against ice formation is exhibited with the starting-freezing time at −20 ℃ three times longer than uncoated surface. Strong resistance to acid and base attacks is observed even after a week of immersion in highly acidic and alkaline environments (pH 1.0–14.0), without much degradation of SHP performance. Efficiency of up to 99.9% is demonstrated in corrosion protection in a solution with pH = 10.0 to extend the life of the metal. In addition, remarkable SHP durability is demonstrated after long-term outdoor exposure. Therefore, this work has shown off a promising methods for SHP coatings towards future practical applications.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
涂层与薄膜
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Mei Qixiang,Deng Guoying,Huang Zehua,Yin Yue,Li Chunlin,Hu Junhui,Fu Yang,Wang Xingpeng,Zeng Yue
Severe acute pancreatitis (SAP) is associated with high rates of mortality and morbidity. Chitosan oligosaccharides (COSs) are agents with antioxidant properties. We developed porous COS@SiO2 nanocomposites to study the protective effects and mechanisms of COS nanomedicine for the treatment of acute pancreatitis. Porous COS@SiO2 nanocomposites released COSs slowly under pH control, enabling sustained release and maintaining the drug at a higher concentration. This study aimed to determine whether porous COS@SiO2 nanocomposites ameliorate SAP and associated lung injury. The SAP model was established in male C57BL/6 mice by intraperitoneal injection of caerulein. The expression levels of myeloperoxidase, malondialdehyde, superoxide dismutase, nuclear factor-kappa B (NF-κB), the NOD-like receptor protein 3 (NLRP3) inflammasome, nuclear factor E2-related factor 2 (Nrf2), and inflammatory cytokines were detected, and a histological analysis of mouse pancreatic and lung tissues was performed. In the SAP groups, systemic inflammation and oxidative stress occurred, and pathological damage to the pancreas and lung was obvious. Combined with porous COS@SiO2 nanocomposites before treatment, the systemic inflammatory response was obviously reduced, as were oxidative stress indicators in targeted tissues. It was found that Nrf2 was significantly activated in the COS@SiO2 treatment group, and the expressions of NF-κB and the NLRP3 inflammasome were notably decreased. In addition, this protective effect was significantly weakened when Nrf2 signaling was inhibited by ML385. This demonstrated that porous COS@SiO2 nanocomposites activate the Nrf2 signaling pathway to inhibit oxidative stress and reduce the expression of NF-κB and the NLRP3 inflammasome and the release of inflammatory factors, thus blocking the systemic inflammatory response and ultimately ameliorating SAP and associated lung injury.
研究领域:
药理学
·
纳米技术
·
病理学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Nianbing Zhong,Ming Chen,Haixing Chang,Tianheng Zhang,Zhengkun Wang,Xin Xin
We present a high-selectivity photochemical fiber-optic sensor in which a plastic optical fiber (POF), TiO 2 -based composite, and polymer membrane are coupled for detection of phenol concentrations in water. A thinned POF is coated with TiO 2 -based composite, which is composed of Er 3+ :YAlO 3 /SiO 2 /TiO 2 (EYST) and acts as the sensing region. The EYST coating shows good light-inducing capacity at the core–coating interface and high photocatalytic activity in the visible light region. The polymer membrane is synthesized using PEBA2533 doped with β-cyclodextrin and shows high phenol selectivity and permeability; thus, phenol molecules can freely permeate the membrane and are then transferred, become attached to the surface of TiO 2 nanoparticles, and are photocatalytically degraded. Photocatalytic degradation of phenol improves the refractive index (RI) and absorbance of the solution because of the photocatalytic byproducts; consequently, the transmitted output light intensity of the sensor changes, and the phenol concentration is accurately detected by measuring the change in the light intensity. Experimental results indicate that the prepared device detects phenol in water with high selectivity and pH independence; in phenol detection, the novel sensor shows a sensitivity of −0.195 × 10 −3 (mg/L) −1 and a low limit of detection of 40 μg/L.
研究领域:
环境科学
·
分析化学
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Zhilei Zhao,Mengyu Ren,Wenqi Zhang,Zikuo Chen,Lu Zhang,Xinquan Qu,Junling Shi,Weiwei Xia,Xiaoguang Xu,Ying Yang
In view of the serious harm and widespread pollution caused by deoxynivalenol (DON), it is crucial to quantify its presence in the food safety assessment process. Here, we designed a core-shell-satellite nano assembly structure as a probe, composed of an anisotropic AuNR@Ag core, an ultra-thin SiO 2 layer and a high surface coverage AuNPs satellites, which showed outstanding SERS activity and high stability. Anti-DON antibodies were modified on the surface of the prepared core-shell-satellite nano-assembly structure as SERS immunoprobe for DON specific detection using SERS-based lateral flow immunoassay (LFIA) with the advantages of simplicity, rapidity, and high sensitivity. Under optimal conditions, the detection limit for detecting DON using the SERS-LFIA method was 0.053 fg/mL, and the linear detection ranged from 0.1 fg/mL to 1 μg/mL. The SERS-LFIA strips based on AuNR@Ag@SiO 2 -AuNP nanostructures demonstrated the great potential for quick quantitative DON detection, providing a reference for trace detection of highly toxin mycotoxins.
研究领域:
食品科学
·
分析化学
·
纳米技术
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mingyan Chen,Chunzhan Song,Yucheng Liu,Ni Zhao,Heping Jiang,Qingxin Luo,Xiaoping Jiang
The pore structure and surface properties of ceramic membranes lead to a low separation flux, which limits their further application. Changing the microstructure of membranes by introducing new technologies is a very effective method. In this study, high flux ceramic substrate membranes were prepared by metal mesh-assisted phase inversion method, and then new PDA@SiO 2 ceramic membranes were prepared by introducing PDA@SiO 2 core-shell structure. During the phase inversion, the metal mesh pores restrict the path of the water nuclei to extract the polymer, and the microchannels grow along the extraction path, creating a uniform pore size above the metal mesh and removing the dense layer below, allowing the ceramic substrate membranes to exhibit high fluxes. PDA@SiO 2 core-shell structures were stably grown on the surface of ceramic membranes by vacuum self-assembly. Due to the introduction of hydrophilic groups and micro-nano scale roughness, the PDA@SiO 2 ceramic membranes exhibit super-hydrophilic/underwater super-oleophobic performance, stabilizing the separation of oil-in-water emulsions with excellent permeation fluxes (1058 L·m⁻²·h⁻¹·0.2 bar⁻¹) and oil removal rate (99 %). PDA@SiO 2 ceramic membranes exhibit excellent stability, fouling resistance, and durability in harsh environments, contamination tests, and cycling tests. Excellent oil-water separation, stability, and durability make PDA@SiO 2 ceramic membranes a promising solution for the treatment of oil-in-water emulsions.
研究领域:
膜技术
·
材料科学
·
环境工程
·
化学分离
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Zihao Chen,Hanbing Zhang,Shuangye Yang,Jie Wei
This paper proposes a patterned material composed of two types of photonic crystals based on CdS and SiO2 nanoparticles. We combined the photonic crystals with poly(ethylene glycol) diacrylate (PEGDA) by nanoparticle self-assembly and UV curing and successfully formed a material containing the different photonic crystals. The material prepared contains two kinds of photonic crystals with different refractive indices, CdS and SiO2 nanoparticles, and due to the large difference in refractive indices of the two materials, the reflection wavelengths of the photonic crystals composed of the two materials also have disparities when the incident angle changes. Macroscopically, the structural colors of the two photonic crystals change with the change in incident angle. In response to this phenomenon, we designed a variety of applications based on a multiangle patterned photonic crystal film to achieve a variety of information storage functions by changing the incident angle and, through the angle change, to achieve lipstick logo, mobile phone bar code, and antipeeping keyboard applications.
研究领域:
材料科学
·
纳米技术
·
光学
·
信息技术
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Qinting Chen,Bin Yang,Mengya Ding,Yang Pan,Jiasheng Qian,Zhengzhi Zheng,Bin Wu,Jibin Miao,Ru Xia,Youlei Tu,You Shi
In this work, SiO 2 @PDA nanoparticles obtained by in - situ coating polydopamine (PDA) on the surface of spherical SiO 2 nanoparticles were adopted to prepare the polyvinylidene fluoride (PVDF) composite films via thermally-induced phase separation (TIPS) method with diphenyl carbonate (DPC) as the diluent. PDA was proved to cover evenly on the surface of SiO 2 nanoparticles, which was favorable to the dispersion of hydrophilic nanoparticles in the matrix. Effect of the presence of SiO 2 @PDA nanoparticles on crystallization behavior, thermal stability, mechanical properties and hydrophilicity of the composite films was intensively investigated. Heterogeneous nucleating effect on the crystallization of PVDF coupled with elevated crystallinity was found upon the incorporation of SiO 2 @PDA without altering the crystal form of PVDF. The rigidity, tensile strength as well as thermal stability of the composite films containing SiO 2 @PDA were significantly improved in comparison to both neat film and those containing unmodified nanoparticles. In addition, the hydrophilicity of PVDF composite films’ surface was remarkably enhanced with an increasing SiO 2 @PDA content, which helped to reduce the protein adsorption of the composite films considerably. The present study would supply an insight into the fabrication of PVDF composite films with desirable performance and capabilities.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Ye Wang,Zhengxuan Hu,Guolong Wu,Xiaonan Zhang,Yanyi Yin,Lin Li,Jianhua Yao
In this study, laser-assisted micro-arc oxidation (LMAO) processing was carried out on Ti6Al4V alloy under laser powers of 30, 45, and 60 W, and the influence of the laser power on the microstructure and wear resistance of the coating was further investigated. The breakdown voltage and termination voltages of LMAO processing decrease gradually as the laser power increases. At the same time, micro-discharges increase in quantity. Within the suitable laser power range (30–45 W), the obtained coating continuously enhances uniformity, thickness, and density with rising power, contributing to higher hardness and adhesion strength . However, raising laser power to 60 W will damage the obtained coating due to the violent micro-discharges, which generate interconnected larger pores in the local area. Laser power also affects the coating's reaction process and phase transition. More electrolyte ions dope into the coating as a consequence of increasing laser power. The Si concentration of the LMAO-45 coating is the highest, whereas that of the LMAO-60 coating comparatively reduces due to localized coating detachment. Moreover, enhancing laser power is more conducive to forming SiO 2 and rutile-TiO 2 phases. Compared with the traditional MAO or other LMAO coatings, the LMAO-45 coating significantly improves wear protection, evidenced by the lowest COF value , the minimum wear rate, and the least peeling during the wear test . Low porosity, surface roughness , high thickness, and increased incorporation of the SiO 2 phase are responsible for the same. However, under 60 W of laser irradiation , the wear resistance of the resultant LMAO coating decreased due to the formation of local damaged areas.
研究领域:
材料科学
·
表面工程
·
生物医学工程
·
生物材料
·
机械工程
·
金属腐蚀与防护
·
纳米材料
·
医用植入材料
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Xiaoyu Sun,Jielei Tu,Lei Li,Weinan Zhang,Kai Hu
The wide-angle broadband antireflective coatings (ARCs) were fabricated by a sol–gel method and covered on a soda-lime glass substrate by using dip-coating process. The crystal structural, morphological and antireflection performance of ARCs were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), ultraviolet spectrophotometer (UV–vis), etc. In addition, the optimal experimental parameters of each coating were obtained by optical film design software combined with experimental characterization. The average transmittance of the wide-angle broadband ARCs is 9% higher than 88.90 % of the soda-lime glass substrate in the range of 400−1200 nm. Furthermore, the preliminary evaluation of wear resistance shows that the antireflective performance of the coating was stable before and after the friction test. All the excellent antireflective performance and abrasion-resistance afforded the ARCs with potential application in fields of construction, medical, new energy, military, etc.
研究领域:
材料科学
·
光学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Yongde Ma,Rengan Liang,Wenquan Wu,Jiayin Zhang,Yanning Cao,Kuan Huang,Lilong Jiang
Developing catalysts with not only hydrogenation activity but also cracking activity is very important for the advancement of suspended-bed hydrocracking technology. Within this respect, MoS 2 /SiO 2 -Al 2 O 3 bifunctional catalyst is a kind of typical catalysts with both hydrogenation and cracking activity. Herein, a series of Zr-doped SiO 2 -Al 2 O 3 mixed oxides were synthesized by a sol-gel coupled with hydrothermal method. The synthesized mixed oxides were characterized for chemical structures and acidic properties. It is found that doping SiO 2 -Al 2 O 3 with Zr atoms significantly increases the numbers of acidic sites. The Zr-doped SiO 2 -Al 2 O 3 mixed oxides were then combined with dispersed MoS 2 , which was in-situ produced from oil-soluble Mo precursors, to fabricate a novel kind of bifunctional catalysts for suspended-bed hydrocracking of heavy oils. Owing to the significantly increased numbers of acidic sites in Zr-doped SiO 2 -Al 2 O 3 mixed oxides, corresponding bifunctional catalysts demonstrate much enhanced activity for suspended-bed hydrocracking of heavy oils in relative to MoS 2 /SiO 2 -Al 2 O 3 bifunctional catalysts.
研究领域:
催化
·
化学工程
·
石油炼制
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Jiawei Sun,Hengchang Bi,Haiyang Jia,Shi Su,Hui Dong,Xiao Xie,Litao Sun
The pollution of water resource and shortage of clean water have become increasingly severe, developing an urgent demand of reliable, efficient yet low-cost material for everyday water purification . In the present work, a superhydrophobic paper tissue-based SiO 2 /PDMS composite has been prepared for both oil absorption and water-in-oil emulsion separation. The fabrication process is quite simple since it takes the full advantage of tissue that has naturally strong capillary force of which allows the material to absorb oil from water much more rapidly and completely (>99.9%) even under harsh conditions. The study has shown the novel material is exceptionally efficient in separating water-in-oil emulsion under gravity but no need of extraneous pressure. A variety of emulsions has been proven with high flux (>2,000 L m −2 h −1 ) and high separation efficiency (>99.4%). It is believed that this study has proposed a highly reliable and efficient, low cost strategy in both oil absorption and water purification , which shed light on water treatment of both civil use and industry.
研究领域:
环境科学
·
材料科学
·
水处理
·
化学工程
✓ 已验证
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 8
·1849
·
IF 3.1
Zhongmin Wang,Xiaoyu Zhou,Yongwei Shang,Bingkui Wang,Kecheng Lu,Weijiang Gan,Huajun Lai,Jiang Wang,Caimin Huang,Zongning Chen,Chenggang Hao,Enlang Feng,Jiacheng Li
The exceptional corrosion resistance and combined physical and chemical self-cleaning capabilities of superhydrophobic photocatalytic coatings have sparked significant interest among researchers. In this paper, we propose an economical and eco-friendly superhydrophobic epoxy resin coating that incorporates SiO2@CuO/HDTMS nanoparticles modified with Hexadecyltrimethoxysilane (HDTMS). The application of superhydrophobic coatings effectively reduces the contact area between the metal surface and corrosive media, leading to a decreased corrosion rate. Additionally, the incorporation of nanomaterials, exemplified by SiO2@CuO core–shell nanoparticles, improves the adhesion and durability of the coatings on aluminum alloy substrates. Experimental data from Tafel curve analysis and electrochemical impedance spectroscopy (EIS) confirm the superior corrosion resistance of the superhydrophobic modified aluminum alloy surface compared to untreated surfaces. Estimations indicate a significant reduction in corrosion rate after superhydrophobic treatment. Furthermore, an optical absorption spectra analysis of the core–shell nanoparticles demonstrates their suitability for photocatalytic applications, showcasing their potential contribution to enhancing the overall performance of the coated surfaces. This research underscores the promising approach of combining superhydrophobic properties with photocatalytic capabilities to develop advanced surface modification techniques for enhanced corrosion resistance and functional properties in diverse industrial settings.
研究领域:
材料科学
·
表面工程
·
腐蚀科学
·
纳米技术
·
环境科学
✓ 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）