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- 저자 : Juanjuan Su (검색결과 3 건)
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Peng, Juanjuan,Li, Junyao,Xu, Wang,Wang, Lu,Su, Dongdong,Teoh, Chai Lean,Chang, Young-Tae American Chemical Society 2018 ANALYTICAL CHEMISTRY - Vol.90 No.3
<P>Sensitivity and detection limit are two vital factors that affect fluorophores-based sensing and imaging system. However, it remains a challenge to improve the sensitivity and detection limit of fluorophores, largely due to their limited response and photophysical properties. In this study, we report for the first time, a novel approach to enhance the sensitivity and detection limit of probes using silica nanoparticles, also known as silica nanoparticles-enhanced fluorescence (SiEF). SiEF can drastically improve the fluorescence intensities and detection limit of fluorophores. A SiEF-improved fluorescent sensor array for rapid and sensitive identification of different heavy metal ions is achieved, and a 3D spatial dispersion graph is obtained based on the SiEF-improved fluorescent sensor array, which provides a lower concentration dependent pattern than fluorophores alone, allowing qualitative, quantitative, and sensitive detection of heavy metal ions. Furthermore, with UV lamp irradiation of the sensor–metal ion mixtures, the output signals enable direct visual of heavy metal ions with low concentration. Thus, the SiEF approach provides a simple and practical strategy for fluorescent probes to improve their sensitivity and detection limit in analytes sensing.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancham/2018/ancham.2018.90.issue-3/acs.analchem.7b02883/production/images/medium/ac-2017-02883t_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ac7b02883'>ACS Electronic Supporting Info</A></P>
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Preparation, Characterization and Properties of Montmorillonite Modified PTFE/Glass Fiber Composites
Yang Meng,Bin Zhang,Juanjuan Su,Jian Han 한국섬유공학회 2020 Fibers and polymers Vol.21 No.5
Inspired by the layered structure and oriented materials, this study exhibits a reinforcement and antibacterialcomposite consisted by polytetrafluoroethylene/glass fiber (PTFE/GF) composites and QACMt. The QACMt used as anorganically modified layered particle is fabricated by a method that montmorillonite (Mt) is modified with quaternaryammonium compounds (QAC). Owing to the composites have a unique layered structure, it was considered as an idealreinforcement to strengthen polymer. Importantly, the tensile strength and toughness of PTFE/GF composites are achievedthe maximal value of 25.5 MPa and 18.1 MJ/m3, respectively. Additionally, the QACMt exhibits good antibacterial activitiesagainst S. aureus and E. coli. This work guides a layered structure to achieve exceptionally high strength and toughness,antibacterial properties.
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Yonghuan Zhao,Yang Meng,Jiandong Lou,Juanjuan Su,Jian Han 한국섬유공학회 2023 Fibers and polymers Vol.24 No.10
The development of multifunctional and high-performance fibers has received much attention owing to a broad application prospect. In this work, the synergistic effect of ionic liquid modification on dispersion of graphene and carbon nanotubes in polyamide 6(PA6) was studied, and the composite fiber was prepared using melt spinning after a simple pre-solution blending. Imidazole chloride ionic liquid is adsorbed on the surface of the two carbon nanofillers through non-covalent bond, which gives a good dispersion and interface bonding in PA6 matrix. When the mass ratio of functionalized carbon nanofillers is 1:2, the mechanical properties and thermal stability of PA6 composite fiber are significantly improved compared with the pure PA6 fiber. Moreover, the PA6 composite fiber has a UV protection factor (UPF) of 158.2 and good antistatic performance with a surface resistivity of 2.60 × 107 Ω.cm. In addition, there is an excellent photothermal conversion performance from the results of 200 W infrared light irradiation test and outdoor photothermal experiments. This work provides a new idea to prepare multifunctional and high-performance composite fibers.
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