核磁共振研究MoDTP及其与ZnDTP的相互作用和机理

利用31P核磁共振谱研究了MoDTP及其与ZnDTP的相互作用，并用Timken实验机、SEM、DSC法分别考察了MoDTP与ZnDTP复合对润滑油板压、抗磨损及抗氧化性能的影响。结果表明：MoDTP与ZnDTP分子间有烷基和／或烷氧基的相互转换；二者并用在综合性能上有较好的协同增效作用。在此基础上，提出了MoDTP与ZnDTP协同增效作用的机理。     

新型汽车发动机油用添加剂的研究进展

本文介绍了汽车发动机油用添加剂尤其是多功能添加剂的发展概况、作用机理、种类、结构及应用效果，并对未来润滑油添加剂的发展方向提供了一些参考，为我国润滑油品的高档化发展提出了几点想法。     

Carboxyl-functionalized Nanocellulose Reinforced Nanocomposite Proton Exchange Membrane

Nanocellulose(NCC) was prepared through the acid hydrolysis of microcellulose(MCC) and was reacted with maleic anliydride to obtain carboxyl-functionized nanocellulose(MA-NCCs). The presence of .OH and .SO3H on the surface of rod-like MA-NCC was confirmed by Fourier transfonn infrared spectrometry(FTIR). Sulfonated poly(aryl ether ether ketone ketone)(Ph-SPEEKK) was synthesized with bis(4-fluorophenyl-methanone) and 2-phenylhydroquinone as monomer. MA-NCC/Ph-SPEEKK nanocomposite membranes with different MA-NCCs content were prepared, and their properties were characterized. Compared with Ph-SPEEKK, MA-NCC/Ph-SPEEKK nanocomposite membrane showed better mechanical and thermal properties and higher proton conductivity. The proton conductivity of the composite membrane with 4%(mass fraction) MA-NCCs under 80℃ was 0.095 S/cm. And its tensile strength reached 30.3 MPa, which was 21.2% higher than that of Ph-SPEEKK pure polymer membrane.     

Design of a backlight module with a freeform surface by applying the Taguchi method

A novel structure, called a "freeform surface," is integrated into a direct type light-emitting diode backlight. By applying the Taguchi method, the performance of this backlight is optimized. The Taguchi experiments are configured in L9e34 T orthogonal arrays and are simulated via Light Tool analysis software. After that, the influence of the design parameters on the luminance and uniformity are separately evaluated by analysis of variance(ANOVA). Next, the parameters are optimized, and a new backlight structure with desirable performance is designed at last. Light Tool simulation shows that this new type of backlight is just 15 mm thick and has 310.3nits luminance and 83.5% uniformity.     

分光计快速调节法——跟踪法剖析

在分光计实验中，调节望远镜光轴与分光计中心轴相互垂直的过程是实验中花费时间较长、出现问题较多的一个环节，利用望远镜跟踪望远镜与平面镜一侧达到自准的十字丝像，并逐步调节以达到望远镜与平面镜另一侧也自准的跟踪法，能够快速完成望远镜光轴与分光计中心轴垂直的调节过程。     

基于PWM的三基色LED的调光调色方法

提出了一种基于脉冲宽度调制(PWM)的三基色发光二极管(LED)调光调色计算模型,建立了混合光的色品坐标与占空比、相关色温与占空比、最大光通量与色品坐标的函数关系。采用红绿蓝(RGB)三基色LED进行实验验证,实验结果表明:计算模型能较好的指导LED光色调节,混合光色品坐标的理论值和测量值之间的误差小于2.5%,模拟太阳光的色温变化误差仅为50 K。该计算模型可应用于各种三通道LED的调光调色,其高精度的优点能更精确地实现智能照明,极具实用价值。     

TBHP/TBAI-mediated oxidation of thiophenols for the synthesis of tert-butyl arylsulfinates

A novel and efficient TBHP/TBAI-mediated oxidation of thiophenols is described. The reactions proceeded smoothly to give tert-butyl arylsulfinates in up to 82% yield with good functional group compatibility under mild conditions.     

Modeling and analysis of under-load-based cascading failures in supply chain networks

Nonlinear Dynamics - The phenomena of cascading failures often happen in complex networks. In most infrastructure networks, the subsequent failures of nodes are caused by overload and many overload...     

Achieving the polarization-manipulated multispectral perfect absorption and sensitive sensing via a metal/insulator/metal elliptical nanocavity array

Optical Review - We present a polarization-manipulated multispectral perfect absorber based on a 2D metal/insulator/metal nanocavity array, in which a periodic structure of stacked Au–Al2O3...     

Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate

Study on proton exchange membrane (PEM) with the aim toward excellent battery performance of PEM for fuel cells has attracted increasing attention. In this work, nanocellulose (CNC) aminated by KH792 noted as NN was prepared. CNC or NN/sulfophenylated poly(ether ether ketone ketone) (sPEEKK) nanocomposite membrane (SN) or (SNN) were produced by solution mixing. SNN was further coated with tetraethyl orthosilicate (TEOS) to obtain SNNT. The properties of sPEEKK, SN, SNN, and SNNT membranes were thoroughly investigated. The proton conductivity of SN4 was 0.22 S·cm^?1 at 90 °C, while a proton conductivity of 0.30 S·cm^?1 was obtained for SNN4, and an even higher value of 0.36 S·cm^?1 at 90 °C was obtained for the TEOS‐coated SNN4 (SNN4T). Meanwhile, SNN4T showed high thermal stability, and its T_d5 was as high as 318.2 °C. Furthermore, the composite membrane coated with TEOS also presented excellent oxidative stability. The mass of SNN2T after treated in Fenton agent for 1 h at 80 °C was still retained 96.2%, and it was not fully dissolved until 11 h. It was illustrated that aminated CNC/sPEEKK nanocomposite membranes coated with TEOS is a kind of promising materials as PEMs for fuel cells. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 2190–2200