Materials Literature
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In order to meet the different demands of the LCD,two novel polyfluorinated polycyano negative dielectric anisotropy liquid crystalline compounds were synthesized.These compounds were synthesized from phthalonitrile and 1,2-difluorobenzene by several steps.Their constructions were confirmed by NMR and elemental analys…
有 spiropyran 的明确的、 reversibly 光应答的 amphiphilic diblock 共聚物 grafted，被可逆 additionfragmentation 链转移(木排) 准备聚合。进水和展览里的聚合微粒自我装配的共聚物可逆溶解和重新聚集特征在之上紫外(紫外) 并且可见(力) 点亮照耀。使不能调动到共聚物上的 spiropyran 的荧光反应是轻的可切换。当 nitrobenzoxadiazolyl 衍生物(NBD ) 染料被包含进微粒的核心时，可逆、光应答的、双颜色的荧光回声精力转移(烦恼) 系统被构造并且处理，它很好或者被调整由 UV/vis 照耀。我们期望这些 photoswitchable 并…
The reaction and microstructure of the cement-fly-ash system were investigated in the pres- ent study. The reaction of cement-fly-ash system was described by a diffusion-controlled reaction process, leaving aside the nucleation and growth and boundary phase reaction processes at an earlier stage. The extent of hydrati…
eld-theoretic Monte Carlo simulations (MC-FTS) we report on a melt of diblock copolymers. Our focus is on the region near the transition between the disordered and lamellar phase. The MC-FTS method in use [1] makes it possible to study systems with a vast number of chains beyond that what is attainable by classical mo…
K-loaded aluminophosphates prepared by impregnation were characterized by X-ray diffraction(XRD), Fourier transform infrared(FTIR) spectroscopy, N2adsorption, and NH3as well as CO2temperatureprogramed desorption(NH3-TPD, CO2-TPD). The results show that potassium was highly dispersed on the surface of the aluminophosph…
Fields of fluid flow and temperature, and residence time distribution(RTD) curves were investigated by mathematical simulation in a one-strand tundish for continuous casting. It was known from the investigation that a big spring uprush formed on surface around the long shroud when molten steel flowed into a turbulence…
Amorphous zinc oxide thin film was prepared through Sol-Gel method using deep-ultraviolet photochemical activation instead of high temperature annealing. The XRD patterns showed that the zinc oxide film was amorphous. XPS analysis showed that the film was mainly composed of Zn O. The Al top electrodes were deposited o…
GdNi5 nanoparticles and GdNi5/Gd2O3nanocapsules（with GdNi5 core and Gd2O3 shell） were prepared by arcdischarge technique under different hydrogen partial pressure.The GdNi5 nanoparticles show irregular spherical shape and have a size distribution of 10—50 nm with an average diameter of 15 nm.In comparison,the GdNi5/Gd…
The remanufacturing blanks with cracks were considered as irreparable. With utilization of detour effect and Joule heating of pulsed current, a technique to arrest the crack in martensitic stainless steel FV520B is developed. According to finite element theory, the finite element(FE) model of the cracked rectangular s…
有象他们的混合一样的 10k 和 200k 的分子的重量的 PEO 的结晶化行为在细节被学习。结果证明更低的分子的重量 PEO 与从完成结晶化的一更短的时间判定了的更快的结晶化率结晶。在另一方面，更高分子的重量 PEO 在相对更高的温度结晶，显示与更低的分子的重量相比的结晶化的早开始一个。有总是， cocrystallize 在冷却期间处理的不同混合比率的这二 PEO 的混合。与 200k 10k PEO 混合赞成系统的结晶化，这被证实。这是不仅在更高的结晶化温度由结晶化的早开始示威了，并且另外关于 200k PEO 的混合的更快的水晶生长。在更高的温度的混合的结晶化被成核的早开始和原子核密度的增长引起。这可以为成核在精力障碍从混…
A parameter retrieval algorithm based on the causality principle and Kramers–Kronig(KK)relations is employed to calculate the effective parameters of three-dimensional(3D)metamaterials.Using KK relations,the branch selecting problem,which is the challenge of effective parameter retrieval method,can be removed.To revea…
In this study, alkaline colloidal silica was prepared by titration of an alkaline solution such as sodium silicate with silicic acid in constant range of pH .This constant range of pH was achieved by using concentrated soduim silicate solutions as pH adjusting solutions during titration.The sodium silicate solutions h…
Novel thermo- and pH-dual responsive amphiphilic copolymers were synthesized based on hy- perbranched polyethylenimine (PEI) by grafting L-phenyl- alanine. The phenylalanine-modified PEI exhibited lower cytotoxicity than commercial PEI. These copolymers showed the phenomena of phase transitions in response to pH and t…
A new colorimetric Cu2+ probe R-Cu was synthesized based on the reaction of rhodamine B and ethylenediamine. R-Cu realized the visual colorimetric detection of Cu2+ in HEPES (5 mmol/L; pH 7.4) within 5 min. With the Cu2+ adding, the absorption of R-Cu was significantly enhanced, showing pink color of rhodamine B. R-Cu…
We investigate propagation behavior of electro- magnetic waves in a slab uniaxial metamaterial waveguide with metal cladding and discuss the dispersion relation, group velocity and energy flux distribution of transverse electric guided modes in two kinds of uniaxial metamaterial waveguides with different orientations…
To establish a clean and efficient nitration process of phenolic compounds, heteropolyacid H6PMo9V3O40( PMAV3) and chromatographic silica gel were respectively chosen as active component and carrier for the preparation of a series of supported catalysts( PMAV3/ SiO2) via the conventional impregnation method. The catal…
CdSe /CdS core-shell nanocrystals were one-step prepared by microwave-hydrothermal method.The growth mechanism of nanoparticles was discussed and attributed to the sulfur release process from mercaptopropionic acid.The results from XRD and Raman spectra suggested that the core-shell CdSe /CdS nanocrystals were obtaine…
以磁性Fe304负载质子化过氧钨酸盐为催化剂，在不用三氟乙酸的情况下，以双氧水为氧化剂，将2，6-二甲氧基吡嗪、2，6-二氯吡嗪和2-氯-6-甲氧基吡嗪高效地氧化为其相应的氮氧化物2，6-二氨基-3，5-二硝基-1-氧吡嗪（LLM-105）。典型条件为：底物10mmol，CH3CN30mL，催化剂Fe3O4／CS／HWO0．1g（约0．1mmol），60℃分5次逐滴加入30％双氧水5mL。反应混合物溶液经萃取和柱色谱法提纯，得产物，收率一般为60％-73％。使用高斯03量化计算程序对氧化过程进行了理论计算，结果与实验数据相符。
混合聚合电解质刷子的导致 pH 的切换上的理论调查被使用一个分子的理论执行。结果显示混合聚合电解质刷子的切换的性质依赖于 pH 价值。在低 pH，否定地控告了链当断然控告的链高度被拉长离开表面时，在刷子的底部上采用紧缩的符合构造。在高 pH 价值，反的转变发生。决定聚合物链符合构造和混合聚合电解质刷子的费用行为的 pH 的角色被分析。在那里存在，这被发现为减少强壮的静电的排斥的机制：链拉长。H+ 并且哦单位作为控告的聚合物的 counterions 起一个更重要的作用。为不同 pH 价值的聚合电解质链的倒塌能被归因于沿着链屏蔽静电的相互作用和调停 counterion 的吸引人的相互作用。
Double-layer Si Nxfilm poly-crystalline silicon solar cell was the research point. Different refractive index and thickness double-layer Si Nxfilm solar cell by modifying PECVD process were prepared. The cells with glass,EVA, backsheet etc were encapsulated. PID(Potential Induced Degradation) test at 85℃, 85%RH was co…