Advanced Composite Materials and Manufacturing Engineering

Paper Title Page

Authors: Zhen Yu Xia, Jiang Yuan Hou, Li Ke
Abstract: Bone has been studied very extensive and embedded in tissue engineering. The composite material has also been valued immensely in bone tissue engineering. With the development of exercise sport, the treatment of sports injuries was increase in importance. This study summarizes the significance of biomaterials in tissue engineering for treatment of sports injuries, and analyzed the development of this area in the last 20 years. The focus was put on the situation of research about bone tissue engineering materials, and concluded the research progress of composite material in bone tissue engineering.
91
Authors: Wen Liu, Yang Yang, Qing Fang Liu
Abstract: The purpose of this study was to evaluate the genotoxicity of advanced composed material—silicone gel-filled breast implant after irradiation sterilization, which will provide basis for the safety of such medical material in clinical application. The irradiation dose for sterilization was set according to ISO11137-2 standard. Ames test, micronucleus test and chromosome aberration test were performed to detect the genotoxicity of silicone gel-filled breast implant. No genotoxicity, no mutagenicity and no significant increase in micronucleus rate in polychromatic erythrocytes of bone marrow were observed in the samples of silicone gel-filled breast implant after irradiation sterilization. Therefore, irradiation sterilization is recommendable to be widely applied to biomedical polymer materials.
95
Authors: Yu Gao, Nan Li, Bin Liu
Abstract: More and more advanced composite materials are used in mainly supporting structure of civil aviation; its airworthiness safety should be the focus of the research. Damage assessment is the key step in the general composite repair procedure. In this paper, the ANSYS calculating method is validated on the basis of classic laminate theory which could be used to calculate composite strength. In one case, it is applied to simulation and modeling of the B767 landing gear door. The case shows that composite damage mode such as low velocity impact damage, curing and fatigue could be evaluated with finite element method, the result of evaluation is provided as a means to composite damage assessment. Thereafter, the finite element method can be used for structural health monitoring to advanced composites.
100
Authors: Shi Qiang Cui, Yan Hua Yang, Shou Zhi Pu
Abstract: Photochromism; Diarylethene materials; Fluorecence; Reaction kinetics. Abstract. A new unsymmetrical photochromic diarylethene, 1-(2-methyl-5-phenyl-3-thienyl)-2-[2-methyl-5-(4-formyl-phenyl)-3-thienyl]perfluorocyclopentene (1a), was synthesized, and its photochromic properties and reaction kinetics were investigated, respectively. The compound exhibited good photochromism both in solution and in PMMA film with alternating irradiation by UV/Vis light. The cyclization processes of compound 1a belong to the zeroth order reaction, while the cycloreversion processes belong to the first order reaction. The optical recording results indicated that the new photochromic diarylethene can be applied in high capacity optical storage.
105
Authors: Wei Wei Geng, Shi Qiang Cui, Shou Zhi Pu
Abstract: A novel photochromic diarylethene 1-{[2-methyl-5-formyl-3-thienyl]}-2-[2-methyl-5-(4-cyanophenyl)-3- thienyl]perfluorocyclopentene(1a) has been synthesized for the examination of its properties including photochromism, fluorescence properties and optical recording. Diarylethene 1a changed the color from colorless to cadet blue upon irradiation with 297 nm UV light, in which absorption maxima were observed at 600 nm in hexane and at 610 nm in PMMA film, respectively. The open-ring isomer of the diarylethene 1 exhibited good fluorescence switch in hexane solution. In hexane solution, the open-ring isomer of the diarylethene 1a exhibited relatively fluorescence at 383 nm when excited at 310 nm.
109
Authors: Shang Hua He, Gang Liu, Shi Qiang Cui
Abstract: A new unsymmetrical photochromic diarylethene bearing a benfuran and a thiophene aryl unit 1-(2-methyl-3-benfuran)-2-{2-methyl-5-[2-(1,3-dioxolane)]-3-thienyl}perfluorocyclopentene (1o) has been synthesized. It’s optoelectronic properties, such as photochromism in solution as well as in polymethylmethacrylate(PMMA) amorphous films, fluorescence and photon-mode polarization multiplexing holographic recording were investigated. Diarylethene 1o changed the color from colorless to red upon irradiation with 313 nm UV light, in which absorption maxima were observed at 509 nm in hexane and at 520 nm in PMMA amorphous film, respectively. This new photochromic system also exhibited remarkable fluorescence intensity and clear fluorescent switches by photo irradiation in solution. Finally, rewritable holographic optical storage using 1a was performed.
113
Authors: Shu Hong Jing, Shi Qiang Cui, Shou Zhi Pu
Abstract: A new photochromic diarylethene, 1-[2-methyl-(5-(4- dioxolane)phenyl)-3-thienyl]-2-(2-methyl-3-benzofuran) perfluorocyclopentene (1o), was synthesized and its photochromic and fluorescent properties were investigated.The product has been characterized by elemental analyses, NMR spectrometry, UV/vis spectrophotometry and Fluorescence spectrophotometry. This diarylethene exhibited reversible photochromism and notable fluorescence photoswitches both in solution and in PMMA films, changing from colorless to pink after irradiation with 297 nm UV light.
117
Authors: Hui Li, Yuan Ming Tu, Gang Liu
Abstract: A novel unsymmetrical photochromic diarylethene bearing bisthiophene moiety 1-[2,5-dimethyl-3-thienyl]-2-[2-methyl-5-(2-methylphenyl)-3-thienyl]perfluoroyclopentene (1o) was synthesized and its photochromic, fluorescent and optical storage properties were also investigated. The compounds exhibited remarkable photochromism both in solution and in PMMA film. The result indicated that the diarylethene 1o changed the color from colorless to purple upon irradiation with 297 nm UV light, in which absorption maxima were observed at 527 and 541 nm in hexane and PMMA film, respectively. The open-ring isomer of the diarylethene 1 also exhibited relatively strong fluorescence both in hexane and PMMA film. The fluorescence intensity declined along with the photochromism upon irradiation with 297 nm light. In addition, optical recording using diarylethene 1c as recording medium was carried out successfully.
121
Authors: Xiao Ting Li, Hui Li, Gang Liu
Abstract: A new unsymmetrical photochromic diarylethene, 1-(3,5-dimethyl-4-isoxazolyl)-2-[2-methyl-5-(4-formylphenyl)-3- thienyl]perfluorocyclopentene(1a) were synthesized, and its properties, such as photochromism and fluorescence properties, were investigated in detail. The results showed that this compound had good thermal stability and exhibited reversible photochromism, changing from colorless to darkred after irradiation with UV light both in solution and in PMMA amorphous film, the maxima absorption of its closed-ring isomer 1b are 529 nm and 541 nm respectively. The open-ring isomer of the diarylethene 1a exhibited relatively strong fluorescence at 492 nm in hexane solution (2 × 10-5 mol/L) when excited at 418 nm. The fluorescence intensity decreased along with the photochromism upon irradiation with 297 nm light. This new photochromic system also exhibited remarkable optical storage character.
125
Authors: Xue Li, Wei Jun Liu, Gang Liu
Abstract: A novel photochromic diarylethene,1-(3,5-dimethyl-4-isoxazolyl)-2-[2-methyl-5-(10-phenanthrenyl)-3-thienyl]Perfluorocyclopentene was synthesized and its photochromic and fluorescent properties were also investigated. The compound exhibited remarkable photochromism, changing from colorless to pink after irradiation with UV light both in solution and in PMMA film. The fluorescence intensity declined remarkably,when irradiation with UV light. Using this diarylethene 1 as optical storage was performed successfully.
130

Showing 21 to 30 of 95 Paper Titles