TALANTA
·
2021
·
IF 6.057
Xiangyu Fan,Hao Zhang,XinRu Zhao,Ke Lv,Tiying Zhu,Yaping Xia,Cheng Yang,Chengjie Bai
Three-dimensional (3D) SERS substrate with the denser “hotspots” is synthesized by the constriction of PDMS film decorated with sandwiched [email protected] @graphene ( [email protected] @G) nanostructure . Graphene layers above and below the AgNPs are used to absorb molecules onto the “hotspots”, and prevent the oxidation of AgNPs in our design. PDMS films can be easily shrunk for 3D structures, causing advantages in enhancement ability and light-matter interaction. Benefiting from the above advantages, a detection limit of 10 −14 M (CV) and enhancement factor (EF) of 3.9 × 10 9 were obtained in our experiment. Theoretical analyses (FDTD) were also used to study the enhancement mechanism. For practical purposes, in-situ detection of MG molecules on the fish surface and the label-free detection of DNA base of adenine (A) and cytosine (C) were also studied. The high enhancement factor, great sensitivity, reliability, and stability of substrate reasonably proved that it can be used as an excellent SERS substrate for biomolecular detection.
研究领域:
材料科学
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生物传感
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2016
·Vol. 23
·期 12
·1-8
·
IF 1.969
Kong Zhineng,Wu Wenting,Yan Jing,Wu Baoying,Zhou Yan,Du Wenqi,Qi Zhengjian
Amphiphilic triblock copolymers containing PDMS and PEG segments were synthesized here by metal-free click chemistry. The structures of PEG-b-PDMS-b-PEG copolymers were characterized through FT-IR, 1 H NMR and GPC. The synthesis procedures of copolymers were carried out under benign conditions without any metal participation. And the self-assembly properties were discussed by fluorescent probe, DLS and TEM result in a lower critical aggregation concentration (CAC), nanoparticles size ranging from 127 nm to 172 nm and formulation of vesicle-like nanoparticles, respectively. Additionally, TGA shows that copolymers exhibits good thermal stability.
研究领域:
材料科学
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化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Xueyun Wang,Ning Li,Daren Xu,Xiangchao Yang,Qunyan Zhu,Dongyang Xiao,Nan Lu
Superhydrophobic substrate is applied in matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) detection due to its confinement effect. The weak interaction of superhydrophobic surface with water/salts makes it potential in one-step enrichment and desalting of peptide in MALDI MS analysis. We fabricate a superhydrophobic substrate by spin-coating poly(dimethyl siloxane) (PDMS) on a candle soot layer. On this substrate, the peptide analytes can be confined and enriched in a small area due to the confinement effect and its strong hydrophobic interactions with PDMS. Meanwhile, the desalting can be easily realized by removing the residual solution after the absorption of analyst molecules due to the weak interaction between water/salt contaminants and the superhydrophobic surface. Using this substrate, angiotensin III (Ang III) in the presence of salt with high concentration (2 M or saturated) can be analyzed, and the peptide sequence coverage of 10 μg/mL myoglobin (MYO) and bovine serum albumin (BSA) digests is enhanced to 51% and 26%, which is 37% and 21% analyzed with the commercial ZipTipC 18 pipette tips. The LOD of bacitracin A (Bac A) in milk with this substrate is 100 pM and nearly 360 times lower than the LOD of standard testing method. This substrate has potential practical applications in proteomics research and actual sample analysis.
研究领域:
分析化学
·
蛋白质组学
·
生物医学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Zhihao Si,Chang Liu,Guozhen Li,Ze Wang,Jingfang Li,Tanlong Xue,Shuai Yang,Di Cai,Shufeng Li,Haoning Zhao,Peiyong Qin,Tianwei Tan
The ultrashort and controllable membrane-forming process is highly required in large-scale production of PDMS membrane. To shorten the cross-linking time, an UV-induced ring-opening polymerization of the epoxide groups was introduced to the preparation of PDMS membranes. PDMS was firstly functionalized with epoxide groups, providing the possibility of being cross-linked under UV irradiation. With this strategy, the membrane curing was finished within 200 s, hence shortened by two orders of magnitude in comparison with the conventional thermal-driven method. Meanwhile, the cationic photoinitiation of epoxide groups can be achieved without oxygen inhibition in an open-air environment. Moreover, the viscosity of the coating solution in the groove is kept constant when protected from light, thus meeting the requirement of the coatability. When applied to the pervaporation of a 1.5 wt% 1-butanol/water solution at 55 °C, the measured 1-butanol separation factor was 45 and the total flux was 1119 g m −2 h −1 . This novel strategy shows a great prospect in the continuous preparation of membrane.
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 and Processing-Process Intensification
·
2015
·
IF 2.071
Fengping Peng,Yaru Ni,Qiang Zhou,Jiahui Kou,Chunhua Lu,Zhongzi Xu
This work reported a universal and effective route to fabricate a kind of flexible photocatalyst film to broaden the scope of application (wearable photocatalyst devices for example). This technology roadmap is premised on the air atmospheric pressure glow discharge (AAPGD) pretreatment. Through treating poly (dimethyl siloxane) (PDMS) with AAPGD technique, the PDMS surface is functionalized by hydroxyl groups and the contact angle gains a minimum value of about 26.0, which make it easy to be decorated for the desired efficiency. Then the PDMS surface can be endowed with photocatalytic activity through wet-chemical method without the bondage of inherent hydrophobic-nature. Owing to the hydrophilic surface, the graphene can be inserted to improve the photocatalytic performance and the flexibility of graphene was kept. Compared with the photocatalysts films without AAPGD pretreatment, the photocatalytic performance of films suffering from AAPGD pretreatment is much higher. Therefore this flexible film strategy, based on AAPGD pretreatment, is of great significance to design flexible photocatalysts films, pushing forward the development of wearable photocatalyst devices.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Luyang Sun,Rui Wang,Buyun Yu,Lu Ju,Tongshuai Sun,Zehui Chen,Xiaoli Peng,Hao Chen,Yunqian Dai,Weibing Lu
Recent developments in wearable wireless communication systems have significantly increased the demand for stretchable antennas. The substrate, which is a critical component for antennas, has a great impact on the antenna’s electromagnetic performance and mechanical properties, particularly at millimeter-wave frequencies. However, conventional methods of incorporating low-loss ceramics into stretchable polymers cannot achieve an equilibrium between low dielectric loss and optimal stretchability. To resolve this issue, we present a novel approach that synergistically integrates electrospun barium titanate (BaTiO3) nanofibers with poly(dimethylsiloxane) (PDMS), achieving a composite membrane substrate with ultralow dielectric loss and exceptional stretchability. Based on this advanced substrate, we develop a wearable array antenna that demonstrates stretchability and remarkable radiation characteristics, effectively addressing the constraints associated with conventional PDMS-based antennas. This proposed antenna is expected to be an excellent candidate for next-generation wearable and stretchable millimeter-wave 5G wireless communication.
研究领域:
材料科学
·
无线通信
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MARINE POLLUTION BULLETIN
·
2023
·
IF 5.8
Chen Zhang,Yuhong Qi,Yarui Guo,Shukun Zhang,Gang Xiong,Kaixuan Wang,Zhanping Zhang
Polystyrene microspheres compounded with polyethylene glycol–based hydrogel (PS-PEG)/polydimethylsiloxane (PDMS) coatings were prepared using the physical blending method. The chemical structure, surface and interface properties, interlayer adhesion, and tensile properties were tested in this paper. Furthermore, the antifouling performance was evaluated through bovine serum albumin fluorescent protein adsorption testing, marine bacteria adhesion testing, and benthic diatom adhesion testing. The results showed that the coating performance was best when 20 wt% PS-PEG hydrogel was added. Its surface energy was only 19.21 mJ/m 2 , the maximum breaking strength was 1.24 MPa, the maximum elongation rate was 675 %, the elastic modulus was 2.53 MPa, and the anti-stripping rate was 100 %. In addition, the coating with added 20 wt% PS-PEG hydrogel bacterial adherence rate was 5.36 % and 2.45 % after rinsing and washing, respectively, and the removal rate was 54.29 %. In the benthic diatom adhesion test , the chlorophyll concentration a-value was only 0.0017 mg/L after washing with added 20 wt% hydrogel, and the protein desorption rate was 84.19 % higher than PDMS in the fluorescent protein adsorption test. This coating has the ‘low adhesion’ and ‘desorption’ characteristics in the three growth stages of biofouling. Meanwhile, the low surface energy of the silicone is stable, and the hydrogel also dynamically migrates to the surface to gradually form a hydration layer, both are synergistic. When 20 wt% PS-PEG hydrogel was added, the coating demonstrated excellent antifouling performance due to its high hydration layer, low surface energy, high elasticity, and high interlayer adhesion. This research is expected to contribute to the practical applications of hydrogel coatings in marine antifouling.
研究领域:
材料科学
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海洋生物学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Guanyu Liu,Huiyun Xia,Yanhui Niu,Xu Zhao,Gengtong Zhang,Lifang Song,Huaxin Chen
Practical significance in terms of the long-term effective application of photocatalytic coatings is greatly challenged by its easy pollution and poor self-cleaning performance. In this paper, a self-cleaning photocatalytic WO 3 -TiO 2 nanorod (MWT) /PDMS building coating (MWT coating) was prepared by spraying methods. The surface hierarchical structure fabricated by MWT and PDMS was a crux to construct a superhydrophobic surface, which endowed MWT coating with self-cleaning performance. Besides, the MWT coating exhibited prominent durability and antifouling property after 450 d practical application of the external wall. The excellent self-cleaning property of the coating was confirmed by the removal and resistance to the adhesion of powder particles. Meanwhile, the photocatalytic properties of MWT endowed MWT coating with the ability to degrade organic pollutants on the surface. The color difference of the coating polluted by methyl red was only 1.18 and 4.77 after 24 h UV and visible irradiation, respectively. This mutual benefit effect of self-cleaning and photocatalysis was also reflected in the degradation of NO. In the first five cycles, the degradation efficiency of NO decreased by 4.74% gradually under visible light due to the adhesion of oxidation products, and most of the MWT on the coating surface was regenerated after flushing, the PCD efficiency increased by 3.71%. Furthermore, after 30 days of outdoor weathering test, the PCD efficiency of MWT coating decreased by 11.74% and 12.05% under UV and visible light, respectively, which lays a foundation for the long-term effectiveness of the MWT coating in the process of use.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Ebrahim Ataeivarjovi,Zhigang Tang,Jian Chen,Zhijun Zhao,Guo Dong
Currently, there is strong interest in carbon capture and absorption as a means of reducing carbon dioxide emissions and combating climate change. Unfortunately, the current and traditional methods to achieve such goals are not economical, because they require a huge absorption–desorption plant with high investment and operating costs and high recycle rates of chemical absorbers. In this paper, we propose a novel CO2 capture method combining dimethyl carbonate as a physical solvent and polydimethylsiloxane (PDMS)/TiO2 nanocomposite as a desorption membrane. The effects of TiO2 concentration, feed temperature, and permeate pressure on the pervaporation process for CO2 capture were studied. Results showed that the addition of TiO2 nanoparticles (up to 5 wt %) resulted in 3.61 kg/m2·h flux and 44.68 selectivity of the membrane. The presence of TiO2 nanoparticles in the PDMS membrane not only increased the performance of membrane’s but also reduced (about 72%) energy consumption. To corroborate our experimental findings, a simple simulation was conducted by Gaussian 09. The modeling results demonstrated that the incorporation of TiO2 nanoparticles to the PDMS led to favorable absorption of CO2 compared with the composite one. These results indicate a novel and promising method to capture CO2 effectively and economically for industrial purposes.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jiale Zhou,Kunquan Li,Zhuohan Chen,Xiaojing Su,Huali Xie,Lei Yao,Yunhui Wu,Xiaofan Zhang,Lu Chen,Xuting Wu,Wenjian Wu
Functional membranes with electrothermal/photothermal effects are considered an effective method for separating water/viscous crude oil mixtures. However, the loading of photothermal and electrothermal particles in polymeric membranes with poor compatibility will deteriorate the membrane performance, leading to the unstable photothermal/electrothermal effects. Therefore, we prepared a hydrophobic sandwich structure polyvinylidene fluoride/reduced graphene oxide/polydimethylsiloxane (PVDF/rGO/PDMS) composite membrane using a two-step electrospinning process, which improved the binding force between the photothermal/electrothermal particles and the matrix with the composite membrane exhibiting super fast electric heating and photothermal effect. The temperature of the composite membrane surface rapidly reached to 162.5 °C within 30 s at 25 V. In addition, the addition of graphene (GO) improved the mechanical properties of the composite membrane. Meantime, the composite membrane possessed stable hydrophobicity and lipophilicity, which was beneficial for separating water/viscous crude oil mixtures. Owing to the controllable pore structure and special wetting behavior, the water-in-oil emulsion was successfully separated. Importantly, the separation rates of the water/crude oil mixtures under the electrothermal effect was 2340 kg·m −2 ·h −1 ·bar −1 . Thus, this study provides a new method for preparing hydrophobic sandwich-like PVDF/rGO/PDMS composite membrane with electrothermal/photothermal effects, which has significant potential for engineering applications in high-viscosity crude oil removal and water-in-oil emulsion separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2016
·Vol. 12
·期 1
·110-120
·
IF 0.728
Jianwei Yuan,Qianqian Li,Jie Shen,Kang Huang,Gongping Liu,Jing Zhao,Jingui Duan,Wanqin Jin
It is still a great challenge to prepare high performance mixed matrix membranes (MMMs) because of the difficulty in finely tuning the compatibility between filler and organic phases. In this work, ZIF-8 nanoparticles hydrophobically functionalized by 5, 6-dimethylbenzimidazole (DMBIM) via shell ligand exchange (SLE) reaction were incorporated into polydimethylsiloxane (PDMS) matrix to fabricate defect-free MMMs. Organic-–inorganic interface compatibility was realized because of more abundant organic ligands from DMBIM. The effects of different loadings on membrane microstructure and gas separation performance were investigated systematically. A significantly enhanced C 3 H 8 /N 2 separation performance with C 3 H 8 permeability over 2.10 × 10 4 Barrer (91 % higher than that of pure PDMS membrane) and C 3 H 8 /N 2 selectivity of 99.5 (116 % higher than that of pure PDMS membrane) were achieved. Additionally, the as-prepared membrane also exhibited excellent stability during long term operation. © 2016 Curtin University of Technology and John Wiley & Sons, Ltd.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Ebrahim Ataeivarjovi,Zhigang Tang,Jian Chen
In this present work, a novel approach has been proposed by which a solvent absorption and membrane desorption methods can significantly reduce the carbon dioxide (CO2) emission and energy consumption. In this method, the CO2 capture processing is based on the combination of membrane and physical solvent. Here, dimethyl carbonate and polydimethylsiloxane (PDMS)–SiO2 nanocomposite were used as the physical solvent and desorption membrane, respectively. However, the main focus of this research was on the CO2 desorption behavior of PDMS–SiO2 hybrid membrane. To do so, the influence of the operating conditions and membrane properties on the pervaporation process to capture CO2 have been investigated. The PDMS–SiO2 hybrid membrane containing 10 wt % SiO2 was the most effective membrane. Results revealed that increase in CO2 concentration from 1.5 to 3 wt % led to decrease in the selectivity from 94 to 47 and increase in flux from 1.7 to 5.38 (kg/m2·h). In addition, an increase in temperature increased the flux and reached the highest level (8.17 kg/m2·h) at 40 °C. However, the selectivity decreased to 36.13. It was found that the addition of SiO2 nanoparticles to the PDMS membrane not only enhanced the membrane performance but also decreased the energy consumption about 75% compared with gas stripping method and mass transfer about 49% compared with pure PDMS membrane. Finally, these results illustrated that such a novel technique used for pervaporation separation process is a green and promising alternative to separate CO2 from the physical solvent.
研究领域:
环境科学
·
材料科学
✓ 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）