COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Wendong Hu,Yingrui Nie,Yang Wang,Pengcheng Gao,Yong Jiang
A facile synthetic route to composite particles with raspberry-like structure was reported, and further led to superhydrophobic and superlipophilic surface by the usage of these composite particles. In this approach, the poly(styrene-co-3-methacryloxypropyl trimethoxysilane) (P(St-MPS)) particles were fabricated by one-step dispersion polymerization . Then, the P(St-MPS)@SiO 2 composite particles with raspberry-like structure were obtained by hydrolysis of tetraethoxysilane (TEOS) with (P(St-MPS)) particles under alkaline conditions. The morphology of the (P(St-MPS))@SiO 2 composite particles could be controlled by adjusting the ratio of the initial reactants 3-methacryloxypropyl trimethoxysilane (MPS) and styrene (St). A possible mechanism of the morphology changes was also discussed, the reactive siloxane groups of the (P(St-MPS)) particles induce the growth of silica generated by the hydrolysis of tetraethoxysilane (TEOS) on its surface to form raspberry-like structure. In addition, the water contact angle (WCA) of the coating was 152° ± 2°, and the oil contact angle (OCA) of the coating was close to 0°, which demonstrated a superhydrophobic and superlipophilic properties by a rational surface modification of this P(St-MPS)@SiO 2 composite particles with raspberry-like structure. Hydrophobic properties could be adjusted by varying the surface morphology of the P(St-MPS)@SiO 2 composite particles. The coatings could be used in applications such as self-cleaning and oil-water separation and whole process was carried out under mild conditions and did not involve complex steps.
研究领域:
材料科学
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表面化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Zhiyan Chen,Zhaomei Wu,Lulu Jiang,Tingting Li,Yajun Gao
The control and detection of sunset yellow (SY) are very important due to the high risk of harmful effects on humans caused by excessive intake. In this work, we reported the synthesis of hollow mesoporous carbon spheres (HMCS) and their application in developing a novel electrochemical sensor for SY. Initially, three hollow carbon spheres with different sizes and pore structures were synthesized by adjusting the ratio of TPOS and TEOS using the hard-templating approach. In comparison, HMCS showed the smallest diameter (290 nm), the largest surface area (2229.1 m 2 g −1 ), and a high content of mesoporous structure. This provides a structural basis for high-efficiency pre-concentration of SY on the surface of the HMCS-modified electrode, which effectively improves its electrocatalytic activity . Under optimized conditions, the HMCS/GCE sensor showed a wide linear range varying from 0.0015 − 4 µM, with an ultralow LOD (0.12 nM). Moreover, the HMCS/GCE sensor was deployed for the detection of SY with the advantages of impressive anti-interference ability, satisfactory reproducibility, good repeatability as well as long-term stability. The proposed sensor has been successfully used for the detection of SY in food samples with spiked recoveries of 91.1–103.3%, showing the promising application of the method for the detection of SY in the food matrix.
研究领域:
分析化学
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电化学
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食品科学
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纳米材料
✓ 已验证
产品关联
DOI
高影响因子
POLYMER TESTING
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2019
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IF 2.943
Di Yang,Junkai Ren,Jiwei Li,Qinglin Wang,Qiu Wang,Zheng Xie,Xiaozhong Qu
Herein we report on a biluminophore fast-responding pressure sensitive coating with a bi-layer structure prepared by a non-sensitive reference base paint and subsequently a classic polymer-ceramic pressure sensitive paint (PSP). The coating procedure is fully sprayable and allows the separation of the two luminophores in each layer to prevent their interference that may affect the pressure responsibility. The major advance is the use of sol-gel process of tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) to make the bottom reference layer which ensures the spreading and affinity of the top PSP, composed of a room-temperature vulcanizing silicone rubber (RTV), so that very thin PSP layer, i.e. less than 5 μm, was achieved. Besides, silane-functionalized carbon dots (CDs) was selected as the reference probe, for it could be well-incorporated with the TEOS/MTES matrix, and gained high loading level and hence strong luminescence of the basecoat to overcome the attenuation effect of the top PSP layer. The resultant biluminophore bi-layer fast-responding PSP (denoted as Fast bi-PSP) showed two completed separated emissions with λ max at 430 and 600 nm for the incorporated CDs and the oxygen sensitive ruthenium complex dye, which enables the utility of intensity ratio from blue and red luminescence for the measurement of surface pressure by following Stern-Volmer relationship. Using a shock tube , the response time of the Fast bi-PSP coating was determined to be 0.4–0.6 ms according to the chemical composition . The ability of the coating for monitoring the dynamic evolution of full-field surface pressure was demonstrated on sample plates at attack angles of 0° and 5°. Our work suggests a facile but efficient way for the future design of self-referenced photoluminescent non-contact surface pressure sensing systems.
研究领域:
航空航天工程
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材料科学
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光学传感
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 45
·49405
·
IF 2.52
Yankun Xie,Weiqu Liu,Liyan Liang,Chunhua Liu,Maiping Yang,Hongyi Shi,Shuo Wang,Fengyuan Zhang
In this study, the silica network and functionalized graphene oxide (GO) were incorporated into the epoxy coating systems, which was aimed to improve the thermal property and corrosion resistance of epoxy coatings. First, tetraethyl orthosilicate (TEOS) oligomers and epoxy hybrid was fabricated through sol–gel method. Then the (3-aminopropyl) triethoxysilane (APTES) modified graphene oxide (FGO) was added into the epoxy hybrid composite to obtain anticorrosion coatings. Fourier transform infrared spectroscopy, thermogravimetric analysis (TGA), Raman spectrum, and X-ray photoelectron spectrum were conducted to evaluate the structural information of GO and APTES modified GO nanosheets. The results indicated that the APTES successfully grafted onto the surface of GO sheets. Besides, TGA curves, electrochemical measurements and salt spray test were also carried out to characterize the thermal performance and corrosion resistance of GO based epoxy coatings. The TGA results revealed that the thermal performance of epoxy coating containing silica network and FGO nanofiller (ES/FGO) was significantly strengthened compared to pure epoxy. The initial degradation temperature of epoxy coating was increased from 300 to 343.7°C after incorporation of silica component and FGO. The EIS measurements demonstrated that the impedance modulus of ES/FGO was significantly higher than neat epoxy, which indicated that the corrosion resistance of epoxy was substantially strengthened after introduction of silica component and FGO. The corrosion rate and inhibition efficiency of epoxy composite coatings were also shifted from 1.237 × 10 −7 mm/year and 76.6% (for neat epoxy) to 1.870 × 10 −9 mm/year and 99.6% (for ES/FGO), respectively. The salt spray test also revealed that the silica and FGO can improve the corrosion resistance of epoxy coating. Additionally, the dispersion of GO sheets was also enhanced after the modification of APTES siloxane.
研究领域:
材料科学
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化学工程
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腐蚀科学
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高分子化学
✓ 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）