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- 저자 : Wu Zhaolin (검색결과 5 건)
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Zhaolin Zhu,Yin Liu,Guiyang Xian,Yan Wang,Chongmei Wu,Xiaobo Peng,Jinxiang Wang,Lingbing Kong 한국고분자학회 2023 Macromolecular Research Vol.31 No.8
Hollow glass microspheres (HGMs), as a reinforcing material to prepare lightweight high-performance composites, have excellent mechanical properties. However, the composites prepared by simply mixing hollow glass microspheres with polymer resin have poor performance. In this study, compound coupling agent-modified HGM/EP composites were prepared by casting process with two silane coupling agents as compound coupling agents. Scanning electron microscopy and infrared (IR) spectroscopy were used to characterize the treated HGM. Meanwhile density, water absorption behavior, and mechanical properties of the modified HGM-filled epoxy composites were examined. It is found that the compound coupling agent could effectively improve the interfacial bonding between HGM and the matrix resin. A new chemical bond was formed between HGM and EP, which was confirmed by IR spectroscopy. Compared with their untreated counterparts, the composites treated with the complex coupling agent exhibited excellent mechanical properties, along with lower density and lower water absorption.
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Zhaolin Zhu,Yin Liu,Guiyang Xian,Yan Wang,Chongmei Wu,Xiaobo Peng,Lingbing Kong 한국섬유공학회 2023 Fibers and polymers Vol.24 No.9
In this study, hollow glass microsphere/epoxy composites modified with compound coupling agent of titanate (CS201) and silane (KH540) were prepared and characterized. The addition of the compound coupling agent improves the interfacial bonding between the microbeads and the resin matrix. Scanning electron microscopy results indicated that the compound coupling agent can effectively reduce the number of voids between the microbeads and the resin. FTIR and XPS spectra showed that new chemical bonds were formed between the hollow glass microspheres and resin, which enhanced the interfacial bonding between them. By testing the water absorption and mechanical properties of the composites, it found that the addition of the hybrid coupling agent can reduce the water absorption to a minimum level of 1.184%. Due to the improvement of interfacial compatibility, mechanical properties of the composites were enhanced, (with tensile strength of 43.03 MPa, bending strength of 44.56 MPa, bending modulus of 1407 MPa and compressive strength of 81.55 MPa). When the content of the coupling agent was 5% and the volume ratio of CS201 to KH540 was 1:1, the synergistic enhancement effect was the most significant.
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New idea about realizing automatic collision avoidance on the sea
Yao Jie,Wu Zhaolin 한국항해항만학회 2001 한국항해항만학회 학술대회논문집 Vol.3 No.-
The rapid development of computer technology and widely application of artificial intelligent provide technology support for realizing navigation automation on the sea, which has achieved great success in shipping advanced countries like Japan, England, America, Germany and also in the developing country, China. However, it still remains in the studying period up to now in aspects of collision avoidance decision-making mathematical model and reasoning mechanism. In this paper, approaches are proposed to establish the collision avoidance automation system. One of them is based on the former studies to realize automation system by make use of finite state machine theory and following the International regulations for Preventing Collision at Sea, 1972. The others are to establish the new idea about automatic collision avoidance system by taking advantage of the free flight idea, hybrid system, game theory used in air traffic management studies in recent years and the common characteristics in both air and sea traffic management.
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Study on surface physical and chemical mechanism of nanobubble enhanced flotation of fine graphite
Tang Chongliang,Ma Fangyuan,Wu Tingyu,Zhang Di,Wang Ye,Zhao Tonglin,Fan Zhaolin,Liu Xinyue 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-
It has been concluded in a recently published investigation that the nanobubble flotation process significantlyreduces the number of fine flake graphite flotation stages and improves the flotation performance. The present study was conducted to explore the mechanisms of surface nanobubbles enhancing flake graphiteflotation by investigating effects of nanobubbles on surface properties of graphite and interactionsbetween particles and bubbles by use of contact angle analyzer, zeta potential analyzer, FourierTransform Infrared Spectroscopy (FTIR), and X-ray Photoelectron Spectroscopy (XPS). The study resultsshow that nanobubbles can improve the surface properties of graphite and enhance the adsorption effectof collector, which increased the contact angle of the graphite surface by 11.93 compared with conventionalflotation. Infrared spectroscopy and potential analysis showed that the nanobubbles could enhancethe hydrophobic attraction and reduce the electrostatic repulsion between the collector and the graphitesurface, which was beneficial to enhance the hydrophobic surface of the graphite and enhance theagglomeration of fine graphite particles. XPS analysis showed that the nanobubbles covered polar hydrophilicgroups (such as CAO, C@O, COOH) on the graphite surface, which enhanced the adsorption of collectorto improve the hydrophobicity of graphite surface.
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Quanjun Yang,Xiaolan Cui,Bin Wu,Yujing Shi,Xiaowei Du,Mingsong Fan,Zhaolin Sun,Chenggang Huang 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.1
Bioassay-guided fractionation of extracts from Fructus Gardeniae led to analysis of its bioactive natural products. After infection by influenza virus strain A/FM/1/47-MA in vivo,antiviral activity of the extracts were investigated. The target fraction was orally administered to rats and blood was collected. High-performance liquid chromatography coupled with photo diode array detector and electrospray ion trap multiple-stage tandem mass spectrometry was applied to screen the compounds absorbed into the blood. A structural characterization based on the retention time, ultraviolet spectra, parent ions and fragmentation ions was performed. Thirteen compounds were confirmed or tentatively identified. This provides an accurate profile of the composition of bioactive compounds responsible for the anti-influenza properties.
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