有机改性硅酸盐材料薄膜微光学元件制作研究

利用正交实验法研究相关因素对ORMOSILS（有机改性硅酸盐材料)薄膜成膜性的影响，并通过调整陈化时间以优化复制工艺。与光敏胶微光学元件相比，复制出的微光学元件光学性能、力学性能有了较大的改善。     

有机改性硅酸盐材料微光学元件制备研究

通过溶胶-凝胶方法，利用有机硅烷（GLYMO）和正硅酸乙酯（TEOS）复合，制备出有机改性硅酸盐材料（ORMOSILS）。该材料适合复制微光学元件，凝胶网络组成分析和相分离研究表明TEOS的预水解对材料性能的重要性。柱面透镜复制结果显示，复制的微光学元件基本保持母版的周期，纵向复制相对误差10%。ORMOSILS突破纯溶胶-凝胶的膜厚极限，避免凝胶干燥收缩引起尺寸的偏差。     

掺杂PbS纳米粒子的有机改性硅酸盐玻璃

本文报道了用溶胶 凝胶法将表面修饰的 Ｐｂ Ｓ纳米粒子均匀固化于有机改性硅酸盐玻璃中的制备方法, 制得的 Ｐｂ Ｓ在改性硅酸盐玻璃中的掺杂浓度为０.５ｗｔ％ , Ｈ Ｒ Ｔ Ｅ Ｍ 显示 Ｐｂ Ｓ 纳米粒子的尺寸为３～４ｎｍ在吸收光谱中, 可以观察到明显的量子尺寸效应, 吸收边蓝移     

光纤材料的研究进展

介绍了各种通信或传感用的光纤的制作材料及研究进展。     

汽车漆中纳米改性材料的研究及应用进展

综述了纳米改性材料在汽车漆中的研究及应用进展,阐述了纳米改性汽车漆在力学性能、色度和抗老化方面的改善状况,指出了纳米改性汽车漆在发展中存在的问题.     

改性复合硅酸盐保温板的开发利用

笔者从技术指标、性能特点、社会经济效益、适用范围等几个方面介绍了改性复合硅酸盐保温板的开发与利用。     

聚合物/层状硅酸盐粘土纳米复合材料的阻燃性能研究

综述了国内外近年来对蒙脱土的有机改性、聚合物/层状硅酸盐纳米复合材料的阻燃性能及其机理研究动向.     

纳米SiO2改性可生物降解材料研究进展

纳米SiO2无毒,无味,无污染,具有优异的纳米特性,与高分子聚合物具有良好的相容性,被广泛应用于改善可生物降解材料性能等领域。综述了纳米SiO2的分散稳定性能,以及纳米SiO2改性聚乳酸、聚乙烯醇等合成型生物降解材料与淀粉、纤维素、壳聚糖、蛋白质、木质素等天然高分子材料的研究进展,并从降低价格及增强性能方面,对其改性可生物降解材料替代某些通用塑料的应用前景进行了展望。     

Sepiolite as a deodorant material: an ESR study of its properties

Sepiolite, a Mg silicate, is used as a deodorant because of its strong adsorbing power. However, the principle by which sepiolite adsorbs gases is not known well. The present authors have tried to analyse this principle as a change of paramagnetic species in the crystal surfaces of sepiolite. After heat-processing sepiolite at the temperatures 150, 550 and 750C, the concentration change of paramagnetic species was observed using NH₃, air, or vacuum as atmospheric environment of sepiolite. The results indicate that, in the absence of zeolitic water, relatively high concentrations of Mn²⁺ and (Mg²⁺) _n ^– (are observed, which are destroyed with NH₃ or water. A multi-line ESR spectrum has been found and is attributed to (Mg²⁺) _n ^– ion which is an entire crystal lattice plane forming a big molecular orbital. The results and an analysis of it seem to indicate that a gas molecule is adsorbed to a crystal plane of sepiolite due to its free spin holding nature. This phenomenon may be called spin adsorption. There should be many more cases in which gas adsorption from the gas phase to the solid phase is controlled by the free-spin holding nature of the solid surface. For such cases the ESR method seems to be a quite powerful and proper technique.     

Fabrication of Ag-doped MoO3 and its nanohybrid with a two-dimensional carbonaceous material to enhance photocatalytic activity

Recently, two-dimensional (2D) carbon-based materials and their nanocomposites have gained considerable fascination as a photocatalysts due to their remarkable contribution towards photocatalytic water splitting and remediation. Herein, a novel 2D reduced graphene oxide (rGO) based silver doped molybdenum trioxide (Ag/MoO₃) photocatalyst was synthesized successfully via hydrothermal and ultra-sonication methods. The surface structure, morphology, functional group characterization, and bandgap of the synthesized photocatalysts were analyzed using advanced physicochemical techniques. The photocatalytic performance of the prepared materials was scrutinized for Methylene blue (MB) dye degradation under solar light illumination. Because of its lower charge transfer resistance (19.54 Ω) and higher electrical conductivity (12.74 × 10² Sm^?1) the rGO/Ag/MoO₃ photocatalyst demonstrated significantly higher photocatalytic activity for dye removal than pure MoO₃ and Ag/MoO₃ photocatalysts. In particular, the rGO/Ag/MoO₃ photocatalyst illustrated about 98% dye degradation at a rate constant (0.0571 min^?1) greater than MoO₃ (0.0097 min^?1) and Ag/MoO₃ (0.0184 min^?1). Ag doping and the addition of rGO sheets led to enhanced optical absorbance and effectual separation of photo-induced electron-hole pairs, causing major progress in the photocatalytic behavior of MoO₃. Transient photocurrent results revealed longstanding photo-excited charge carriers in the graphene-based material.     

聚氨酯作为生物材料的研究及应用进展

聚氨酯是一类研究广泛的具有良好的组织相容性和血液相容性生物材料。从制备方法、应用及其改性这三个方面综述了近年来对聚氨酯的研究进展,并提出今后的发展方向。     

Fictive temperature in silica-based glasses and its application to optical fiber manufacturing

This paper will thus give an overview of methods to reduce efficiently the Rayleigh scattering loss via the fictive temperature in silica-based optical fibers. We will first recall what the concept of fictive temperature T_f is and its limitations in section 2. We will see that both Raman and IR spectroscopy can be used to determine T_f (Section 3). Section 4 will thus give some examples of T_f profiles measured in optical fibers manufactured in different conditions. Finally, section 5 will present the main approaches to reduce Rayleigh scattering loss in silica-based fibers via a reduction of T_f.     

Fiber Raman background study and its application in setting up optical fiber Raman probes

Fiber Raman background spectra of different types of fused-silica fibers are studied and compared. The results show the following: (a) all the background spectra are very similar and comparable with Raman spectra of fused silica, regardless of the difference in the cladding and buffer materials; (b) the overall background intensity increases with the fiber numerical aperture but has no obvious relation with the core diameter. Both experimental evidence and theoretical explanation have been provided for these views. A simple and unfiltered fiber probe for surface-enhanced Raman scattering detection with low fiber Raman background interference is constructed, and the optimum configuration of the probe is suggested and discussed based on the results of the background study.     

植物纤维改性方法及其增强复合材料研究进展

植物纤维增强的复合材料具有低成本、降解性能良好的特性,但植物纤维与被增强材料之间存在着界面相容性较差的问题。因此,需通过合适的处理对植物纤维进行表面改性,以改善纤维与被增强材料之间的界面相容性,提高复合材料的力学性能。简要介绍了植物纤维的结构和性质,综述了近年来植物纤维改性方法对纤维和纤维增强的复合材料性能的影响。最后分析了各种方法的优缺点并对植物纤维的改性技术和复合材料的未来发展趋势进行了展望。     

A material allocation scheme for optical fibre cable manufacturing: a case study

Optical fibre cable manufacturing is a multistep process that combines individual fibres into colour-coded buffer tubes. These tubes are grouped together to make cables in which individual fibres are protected from external loads and environmental factors. This assembly process has a tree structure in which components are progressively combined into a finished cable. The main component, optical fibre, is held in inventory on spools in varying lengths and in both pre-coloured and natural states. Orders are received for lengths of finished cable. Since the glass fibre is the highest cost component of the cable, the allocation of fibre inventory to orders should be accomplished so that fibre scrap is minimized. In this paper a heuristic procedure for minimizing glass fibre scrap is presented. Computational results are given.     

Fabrication and characterization of dye-doped polymer optical fiber as a light amplifier

The fabrication and characterization of a Rhodamine 6G-doped polymer optical fiber amplifier have been carried out. Two different schemes were employed to characterize the optical fiber: the stripe illumination technique to study the fiber as a gain medium and another technique to study its performance as an amplifier. We observed a spectral narrowing from 42 to 7 nm when the pump energy was increased to 6 mJ in the stripe illumination geometry. A gain of 18 dB was obtained in the amplifier configuration. The effects of pump power and dye concentration on the performance of the fiber as an amplifier were also studied.     

Functionalization of carminic acid,the study of its electrochemical,linear, and nonlinear optical properties as a potential material for optoelectronic applications

Journal of Materials Science: Materials in Electronics - A new material obtained from the functionalization of the carminic acid molecule (MCA) with attractive optical and electrochemical...     

Fabrication and characterization of dye mixture doped polymer optical fiber as a broad wavelength optical amplifier

Rhodamine 6G and Rhodamine B dye mixture doped polymer optical fiber amplifier (POFA), which can operate in a broad wavelength region (60 nm), has been successfully fabricated and tested. Tunable operation of the amplifier over a broad wavelength region is achieved by mixing different ratios of the dyes. The dye doped POFA is pumped axially using 532 nm, 10 ns laser pulses from a frequency doubled Q-switched Nd: YAG laser and the signals are taken from an optical parametric oscillator. A maximum gain of 22.3 dB at 617 nm wavelength has been obtained for a 7 cm long dye mixture doped POFA. The effects of pump energy and length of the fiber on the performance of the fiber amplifier are also studied. There exists an optimum length for which the amplifier gain is at a maximum value.