再论显色剂的比较研究

从应用的观点出发提出了一个四合一的评价显色剂的判据：安全性，稳定性，反应选择性和灵敏性。     

改进总氰化物测定中显色剂的加入方法

总氰化物含量是水体环境监测的重要指标,测定过程中会发生氰化氢和氯化氰气体挥发出来的现象,为了保障从业人员人身安全并规避环保风险,针对水质总氰化物测定过程中显色剂的加入方法与操作程序进行改进,过程中配备一种25 mL比色管的专用胶塞,并采用满足实验精度的医用注射器分步加入试剂。     

燃料电池用阴离子交换膜的研究进展

本文简单介分析了燃料电池用阴离子交换膜需要具备的特点,针对AEM电导率和稳定性提升展开了深入的研究,希望可以通过提升AEM电导率和稳定性方式使AEM性能得到改善和加强,更好的满足燃料电池实际需要,降低燃料电池生产成本,提高其性能,为我国社会经济的持续稳定发展做出相应贡献。     

单价选择性阴离子交换膜的改性研究进展

详细介绍了表面改性法和膜基体改性法的原理、特点及其改性效果,总结了近3年来单价选择性阴离子交换改性的研究进展并对不同改性方法进行了评价。结果表明,膜改性是一种提高单价选择性阴离子交换膜的渗透选择性、离子通量和抗污染性能的有效方法。最后分析了限制单价选择性阴离子交换膜量产的因素,并展望了单价选择性阴离子交换膜可能的量产方向。     

阴离子法合成端羟基聚丁二烯研究进展

介绍了阴离子法端羟基聚丁二烯(HTPB)的特点和应用,以及国外阴离子法生产HTPB的工业化情况。详细叙述了阴离子法HTPB的国内外研究进展情况,重点介绍了羟基保护的阴离子法合成HTPB的方法。     

水杨酸锌无碳复写显色剂(CF涂料)的研制

介绍了无碳复写显色剂 (CF涂料 )的种类和水杨酸锌酚醛树脂螯合物及其显色剂分散液的制法 ,所制显色剂显色性能达到国外产品水平     

环境中阴离子表面活性剂检测方法研究进展

概述了阴离子表面活性剂给水环境带来的危害,深入分析了目前阴离子表面活性剂的主要测定方法以及各优缺点,并对今后检测方法的改进方向进行了介绍,指出联用技术将成为未来水环境中阴离子表面活性剂检测的主要技术。     

显色剂应用于环境样品中铜离子的检测研究

研究在无活性剂存在条件下铜离子与显色剂形成配合物从而进行分光光度法检测铜的最佳测试条件。铜离子与显色剂在波长475nm处有最大吸收,Cu2+的含量在0.6～64μg/10mL范围内呈直线关系,直线回归方程为:A=0.0114C-0.004(A-吸光度,C-μgCu2+/10mL),相关系数为r=0.9994,其表观摩尔吸光系数为:0.072×105L·mol-1·cm-1。摩尔比法及等摩尔连续变化法测定配合物的组成比为n(Cu2+):n(显色剂)=1:1。     

基于光纤传感的石化机械振动监测系统开发

提出了应用光纤传感技术对石化设备进行振动监测的方法。开发了基于虚拟仪器Lab-VIEW的监测系统,分析了故障判断原理。该系统既实现监测数据的远程传输与在线分析功能,又具有完善的离线分析与显示功能。利用该系统对某型号往复式压缩机进行了现场测试,结果表明该系统具备了对石化设备进行实时监测的能力。     

光纤传感器的研究与应用

阐述了光纤传感器的特点、结构原理及综合应用.介绍了光纤传感器测井的优点,并论证了光纤传感技术以其独特的优势取代传统电子传感技术的发展趋势.     

复合材料光纤应变传感器发展概况

本文简要介绍了国内外复合材料嵌入式光纤应变传感器的发展情况，重点介绍了二涉型、模式型、偏振型和光强型四种尖型光纤应变传感器的研制状况。     

Materials Development of Optical Fiber

Traditionally, new materials are developed in response to the requirements of an emerging device technology. In the optical fiber case, development of glass as a transmission medium came as the culmination of a century-long quest for improved broadband telecommunications, a search that established the superiority of light signals transmitted through glass over electronic signals transmitted by wire.     

Atom-Transfer Radical Polymerisation (ATRP) as a Tool for the Development of Optical Sensing Phases

The advantages of atom-transfer radical polymerisation (ATRP) for synthesising well-defined polymers have made this technique very popular in recent years for the synthesis of new polymers and copolymers with optical properties. The components involved in ATRP and their effect on composition, functionalities and topology have been reviewed according to the optical properties of the obtained (co)polymers. Because several functionalities and architectures can be combined in ATRP, this technique is a useful tool for the synthesis of new (co)polymers specially designed to meet the requirements of the sensor setup.     

荧光氧传感器的二点标定方法

１前言作为一个重要成分和操作控制参数,氧浓度的监测,不仅在细胞培养与发酵系统,在化学化工、医疗保健、食品卫生以及环境保护等许多行业和部门均有着十分重要的意义。由于其他许多组分的分析和测量,最终都可归结为氧浓度的分析和测量（如许多生物传感器都以氧传感器...     

Optical biosensor for catechol determination based on laccase-immobilized anionic polyamide 6 microparticles

This work presents the preparation, optimization, and testing of an enzyme-based optical biosensor for catechol determination. The sensing area is attached to a glass support and contains: anionic polyamide 6 (PA6) porous microparticles supporting laccase from Trametes Versicolor, embedded in a Pebax® MH1657 polymer binder that contains the optical indicator dye 3-methyl-2-benzothiazolinone hydrazone (MBTH), responsible for the optical transduction. The catechol analyte, after its enzymatic oxidation, forms o-benzoquinone that can be detected by oxidative coupling with MBTH giving rise to a colored product. The latter can be quantified measuring the UV/VIS absorbance at 500 nm. The PA6 microparticles performed as useful laccase carriers reaching high immobilization yields of up to 99.8% and preserving the enzyme catalytic activity. This permitted the preparation of a new biosensor presenting a detection limit of 11 μM and responding linearly to up to 118 μM of catechol. Biosensor applicability was tested in spiked natural water samples from river and spring. The recovery rates observed were in the range of 97–108% that proves the good accuracy of the proposed biosensor.     

Durable,Sensitive, and Wide‐Range Wearable Pressure Sensors Based on Wavy‐Structured Flexible Conductive Composite Film

Flexible pressure sensors have potential applications in human motion monitoring and electronic skins. To satisfy the practical applications, pressure sensors with a high sensitivity, a low detection limit, a broad response range, and an excellent stability are highly needed. Here, a piezoresistive pressure sensor based on wavy‐structured single‐walled carbon nanotube/graphite flake/thermoplastic polyurethane (SWCNT/GF/TPU) composite film is fabricated by a prestretching process. Due to the random wavy structure, high conductivity, and good flexibility, the prepared sensor displays a low detection limit of 2 Pa, a wide sensing range of 0–60 kPa, and a high sensitivity of 5.49 kPa^?1 for 0–50 Pa. Furthermore, the sensor shows a remarkable repeatability of over 1.1 × 10⁴, 9.0 × 10³, and 2.0 × 10³ pressure loading/unloading cycles at 50 Pa, 500 Pa, and 30 kPa, respectively, and a fast responsibility of 100–150 ms of loading response time and 400–600 ms of relaxation time. Therefore, the pressure sensor is successfully adopted to monitor both the large‐scale human activities (e.g., walk and jump) and the small‐scale signals (e.g., wrist pulse). Furthermore, a sensor array is assembled to map the weight and shape of an object, indicating its various potential applications including human–machine interactions, human health monitoring, and other wearable electronics.     

Optical sensor based on fluorescent PMMA/PFO electrospun nanofibers for monitoring volatile organic compounds

The development of polymeric materials with superior electrical and/or optical properties is highly demanded for designing optical gas sensors, where conjugated polymers play an important role due to their π‐electron conjugation. However, usually the low processability and high cost of these materials hinder technological applications. Here we report on a simple route to develop highly fluorescent electrospun nanofibers of poly(methyl methacrylate) (PMMA) containing low contents of polyfluorene (PFO). The PMMA_PFO nanofibers were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis, while the luminescence properties changes were evaluated by exposing the PMMA_PFO nanofibers to distinct volatile organic compounds (VOCs) including ethanol, toluene, tetrahydrofuran, acetone, dichloromethane, and chloroform. The changes in luminescence properties, specifically fluorescence quenching, of PMMA_PFO nanofibers were analyzed in terms of conformational changes from glassy‐phase to β‐phase of PFO when the nanofibers were exposed to the VOCs. The developed nanostructured platform showed a suitable response to detect chloroform, with linear responses in the concentration range from 10 to 300 ppm and from 350 to 500 ppm and limits of detection of 47.9 and 15.4 ppm, respectively. The results suggest the PMMA_PFO electrospun nanofibers are highly potential materials for optical gas sensor applications based on luminescence quenching. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46128.     

Optical Materials the Based on Low Flammable Epoxy Resins

Abstract

The glycidylic ethers of phosphorus acids are offered as effective modifiers of optical, hardness, heat-physical, and technologic properties, as far as chemical active antipyrenes for epoxy resins. Materials properties at various forming steps were studied using a wide set of spectral, thermal, physico-mechanical methods. Peculiarities of olygomeric mixtures phase state and regularities of its change as a function of modifiers concentration and chemical structure are brought out. A large amount of quantitative information concerning glycidylic ethers content and structure, and materials forming regims influence on their maintanance and optical properties is presented. Compositions and manufacturing regims of optical materials are optimized on the bases of derived results. The developed materials are offered as an optical adhesives and glasses with regulated optical properties such as deflection index, optical density at different wavelength etc. Addition of phosphporus modifiers to epoxy oligomers led to increase of destruction temperature and coke yield, to decrease of mass loss and to smoke suppression. All produced materials are characterized by low inflammability and enhanced thermal stability.