Wearable Triboelectric Nanogenerators Based on Printed Polyvinylidene Fluoride Films Incorporated with Cobalt-Based Metal-Organic Framework for Self-Powered Mobile Electronics

In this study,wearable triboelectric nanogenerators comprising bar-printed polyvinylidene fluoride(PVDF)films incorporated with cobalt-based metal-organic framework(Co-MOF)were developed.The enhanced output performance of the TENGs was attributed to the phase transition of PVDF from a-crystals toβ-crystals,as facilitated by the incorporation of the MOF.The synthesis conditions,including metal ion,concentration,and particle size of the MOF,were optimized to increase open-circuit voltage(VOC)and open-circuit current(I_(SC))of PVDF-based TENGs.In addition to high operational stability,mechanical robustness,and long-term reliability,the developed TENG consisting of PVDF incorporated with Co-MOF(Co-MOF@PVDF)achieved a VOC of 194 V and an I_(SC)of 18.8μA.Furthermore,the feasibility of self-powered mobile electronics was demonstrated by integrating the developed wearable TENG with rectifier and control units to power a global positioning system(GPS)device.The local position of the user in real-time through GPS was displayed on a mobile interface,powered by the battery charged through friction-induced electricity generation.

Synthesis and Characterization of Mesoporous Materials MCM-41 Incorporated by Yttrium, Neodymium and Samarium

Using cetyl-trimethyl-ammonium bromide （CTMAB） as template and tetraethylortho-silicate （TEOS） as silica source, the MCM-41 mesoporous materials incorporated in framework by Y, Nd and Sm were synthesized by hydrothermal synthesis method. The structure, morphology of materials and the state of Y, Nd, Sm in materials were investigated by means of XRD, nitrogen adsorption-desorption, SEM, IR spectrometry, TG-DTA. The XRD results indicate that the samples possess the mesoporous MCM-41 structures with ordered hexagonal arrangements. Y, Nd and Sm ions can get into the framework of mesoporous materials. Nitrogen adsorption desorption isotherms show that the samples have typical mesopores characteristics. SEM micrographs reveal that incorporated sampies show a spherical morphology and the diameters are averagely 0. l0 to 0.15 μm. In IR spectrum of samples, there are the feature adsorption peaks about Si-O-Ln（Ln=Y, Sm, Nd）at 960-985 cm^-1, which affirm that Y, Nd, Sm ions locate in the framework of several mesoporous materials. Results from TG-DTA analysis suggest that two different template sorption sites exist in the framework of YMCM-41, SmMCM-41, NdMCM-41, which powerfully proves that the presence of Y, Nd and Sm in Si framework of the materials.

Microwave Absorption Properties of Polyester Composites Incorporated with Heterostructure Nanofillers with Carbon Nanotubes as Carriers

Carbonaceous nanomaterials such as carbon nanotubes （CNTs）, magnetic metal nanomaterials and semicon- ductor nanomaterials are superior candidates for microwave absorbers. Taking full advantage of the features of CNTs, nanophase cobalt and nanophase zinc oxide, whose main microwave absorption mechanisms are based on resistance loss, magnetic loss and dielectric loss, we fabricate CNT/Co and CNT/ZnO heterostructure nanocom- posites, respectively. By using the CNTs, CNT/Co nanocomposites and CNT/ZnO nanocomposites as nanofillers, composites with polyester as matrix are prepared by in situ polymerization, and their microwave absorption per- formance is studied. It is indicated that the synergetic effects of the physic properties of different components in nano-heterostructures result in greatly enhanced microwave absorption performance in a wide frequency range. The absorption peak is increased, the absorption bandwidth is broadened, and the maximum peak shifts to a lower frequency.

On How to Incorporate Cultural Connotation into English Vocabulary Teaching

0 Introduction From a sociolinguistic perspective,competence in language use is determined not only by the ability to use language with grammatical accuracy,but also to use language appropriate to particular contexts.Thus,successful language learning requires language users to know the culture that underlies language.However,in foreign language teaching practice,culture teaching is often neglected,or introduced as no more than a supplementary diversion to language instruction.And the methods on how to teach the cultural knowledge is attached even less importance to.

Synthesis and Characterization of Mesoporous Materials MCM-41 Incorporated by Yttrium, Neodymium and Samarium

Using cetyl-trimethyl-ammonium bromide （CTMAB） as template agent and tetraethylorthosilicate （TEOS） as silica Source, the MCM-41 mesoporous materials were synthesized with Y, Nd and Sm incorporated in the framework under hydrothermal conditions. The structure and the micro-morphology of the materials and the state of Y, Nd and Sm were investigated through the analyses of XRD, nitrogen adsorption-desorption isotherm, SEM, IR and TG-DTA. The XRD resuits indicate that the synthetic samples are of typical structure of mesoporous MCM-41 with ordered hexagonal arrangements, and Y, Nd and Sm can be incorporated into the framework of these mesoporous materials. Nitrogen adsorption-desorption isotherms show that the samples possess the typical mesopores character. SEM micrographs reveal that the incorporated samples show a well-defined spherical morphology with the diameter ranging 0.10 - 0.15μm. The occurrence of two different template sorption sites in the framework as revealed by TG-DTA analysis further suggests the presence of Y, Nd and Sm in siliceous framework.

Viscoelastic Properties and Bioactivity of Sol-Gel Derived Gelatin-Silicate Composites: Effects of the Incorporated Ca^(2+) Ions

Several gelatin-silicate composites, with or without incorporation of Ca2+ ions, were synthesized through sol-gel processing starting from gelatin and 3- (glycidoxypropyl) trimethoxysilane. The structure around the Si atoms was similar for all the samples. The measurement of viscoelastic properties indicated that the glass transition temperature and activation energy decreased with the incorporation of Ca2+ ions. The Ca2+ ion-containing composites were bioactive as they spontaneously deposited apatite when soaked in a simulated body fluid of the Kokubo recipe.

MODIFIED ELECTRODE WITH SiW_(12)O_(40)^(4-)INCORPORATED INTO POLY(4-AMINOAZOBENZEN)FILM

The immobilization of SiW_(12)O_(40)^(4-)in poly(4-aminoazobenzene)film was done by electrochemical method.According to the continuous cyclic voltammograms of the modified electrode,it can be determined that SiW_(12)O_(40)^(4-) in the polymer is very stable.The paper reports the elecctrochemical pro- perties of the modified electrode,Moreover,it was found that the modified electrode exhibits electrocatalysis for the reaction of oxygen.

June 2019 Released by Cotton Incorporated

Recent price movement Most benchmark prices decreased over the past month. Chinese prices moved sharply lower.Open interest has shifted from July and into the December contract. After moving lower in early May, values for the July contract were volatile but rangebound between 65 and 70 cents/lb for most of the past month. Values for the December contract also moved lower in early May. While they had been rangebound, December prices have been testing the lower end of their recent range, briefly dropping below 65 cents/lb in the latest trading.

March 2019 Released by Cotton Incorporated

Recent price movement Benchmark prices were flat or slightly higherover the pastmonth. Prices for the May NY futures contract increased over past month,climbing from levels just below 70 cents/lb in mid-February to those near 74 cents/lb recently.

Diodes Incorporated推出脱机式变压器专用的小型同步整流MOSFET驱动器

Diodes Incorporated(Nasdaq:DIOD)为领先业界的高质量应用特定标准产品全球制造商和供货商,其产品涵盖广泛领域,包括独立、逻辑、模拟和混合讯号半导体等市场。该公司今日宣布推出APR346二次侧同步整流MOSFET驱动器,可将AC电源转成DC电源,提供5V至20V的电压,提升脱机式变压器的效率。APR346可运作于连续导通模式(CCM)、不连续导通模式(DCM)与准共振模式(QR),旨在驱动外部MOSFET,充分发挥同步整流(SR)效益。相较于次级侧二极管整流,同步整流不仅能显著改善产品效能,亦能提高效率。同步整流(SR)

Insights into cotton sustainability and innovation Cotton Incorporated promotes cotton at 2019 Intertextile Shanghai Apparel Fabrics

September 25th-27th, 2019 - Cotton Incorporated (“CI”) promotes sustainability and innovation at the 2019 Shanghai Intertextile Apparel Fabrics Show at National Exhibition Center. With research and develop-ment efforts through the entire supply chain, Cotton In-corporated presents the cotton fiber’s sustainability and cotton products’ competitiveness in the market to Shanghai Intertextile.

Diodes Incorporated推出IoT应用专属的脱机降压转换器

Diodes Incorporated最新推出AL17050,此款通用脱机降压转换器是为低功耗物联网(Io T)应用所设计。本产品搭载宽广的AC输入电压范围及全方位整合式MOSFET设计,藉此提供精巧、高效率的解决方案,可为需要严格遵循待机功率限制的低功耗应用产生恒定电压。AL17050适用于85VAC至265VAC的AC输入电压范围,无论身处任何地区,皆能安心使用此产品。其使用的内部MOSFET不但可承受高达500V的电压,亦大幅改良低功耗应用,因此该装置仅会损耗100μA的静态电流。此外,这款装置还结合低负载自动调整技术,尽显出色的整体效率。

Diodes Incorporated汽车级稳压器提供5V、8V或12V输出,容许60V电池瞬态

Diodes Incorporated推出的ZXTR2105FQ、ZXTR2108FQ和ZXTR2112FQ稳压器晶体管符合高可靠性AECQ101标准,并通过生产零件核准程序(PPAP)。这些稳压器可在12V或24V额定电池供应下提供5V、8V或12V的稳压输出,极适合为汽车电子组件供电。这些装置可耐受最高60V的电池电压峰值,让无法使用标准线性稳压器的应用得以实现。这些稳压器晶体管将晶体管、齐纳二极管和电阻器整合在SOT23封装内。

Cotton Incorporated:Color & Surface——Trend Forecast S/S 2011

Daredevil·Gladiator·Cherry Red·Whirlwind·Flash·Grit·Spider Grass·MercuryWith less to lose,we take a risk,creating challenges and pushingourselves in ways we only fantasized about while living in the safezone.Self-tested,defying limits,we feel invigorated.Each stepwe take towards our wildest dreams brings us one step closer tothe edge.This dynamic palette merges bold and muted tones.Itschameleon nature applies from active to formal wear.

Cotton Incorporated: Denim and activewewar trend

Editor’s note:Cotton Incorporated has recently published its FW17/SS18 Denim Trend Forecast and 18/19 Active Trend Forecast respectively, which are presented here to share with our dear readers.FW17/SS18 Denim Trend Forecast Denim color shifts slightly away from all indigo to a more playful approach this season. Indigo remains essential but is shown in a less conventional way - being interspersed amongst four mini palettes.

Cotton Incorporated's professional curriculum expands with focus on technical textiles

Cotton University^TM adds four new courses to the College of Nonwovens Cotton Incorporated,the research and promotion company for U.S.cotton producers and importers,expands offerings on its Cotton University？platform with four new courses in the College of Nonwovens section.Cotton University^TM is an online resource aimed at supporting today’s industry professionals,while nurturing the next generation through education and engagement.

In situ growth of minimal Ir-incorporated CoxNi1-xO nanowire arrays on Ni foam with improved electrocatalytic activity for overall water splitting

Exploration of cost-effective electrocatalysts for boosting the overall water-splitting efficiency is vitally important for obtaining renewable fuels such as hydrogen.Here,earth-abundant CoxNi1-xO nanowire arrays were used as a structural framework to dilute Ir incorporation for fabricating electrocatalysts for water splitting.Minimal Ir-incorporated CoxNi1-xO nanowire arrays were synthesized through the facile hydrothermal method with subsequent calcination by using Ni foam(NF)as both the substrate and source of Ni.The electrocatalytic water-splitting performance was found to crucially depend on the Ir content of the parent CoxNi1-xO nanowire arrays.As a result,for a minimal Ir content,as low as 0.57 wt%,the obtained Ir-CoxNi1-xO/NF electrodes exhibited optimal catalytic activity in terms of a low overpotential of 260 mV for the oxygen evolution reaction and 53 mV for the hydrogen evolution reaction at 10 mA cm?2 in 1 mol L–1 KOH.When used as bifunctional electrodes in water splitting,the current density of 10 mA cm–2 was obtained at a low cell voltage of 1.55 V.Density functional theory calculations revealed that the Ir-doped CoxNi1-xO arrays exhibited enhanced electrical conductivity and low Gibbs free energy,which contributed to the improved electrocatalytic activity.The present study presents a new strategy for the development of transition metal oxide electrocatalysts with low levels of Ir incorporation for efficient water splitting.

Band Engineering and Morphology Control of Oxygen‑Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution

Graphitic carbon nitride(g-C3N4)-based photocatalysts have shown great potential in the splitting of water.However,the intrinsic drawbacks of g-C3N4,such as low surface area,poor diffusion,and charge separation efficiency,remain as the bottleneck to achieve highly efficient hydrogen evolution.Here,a hollow oxygen-incorporated g-C3N4 nanosheet(OCN)with an improved surface area of 148.5 m2 g^−1 is fabricated by the multiple thermal treatments under the N2/O2 atmosphere,wherein the C–O bonds are formed through two ways of physical adsorption and doping.The physical characterization and theoretical calculation indicate that the O-adsorption can promote the generation of defects,leading to the formation of hollow morphology,while the O-doping results in reduced band gap of g-C3N4.The optimized OCN shows an excellent photocatalytic hydrogen evolution activity of 3519.6μmol g^−1 h^−1 for~20 h,which is over four times higher than that of g-C3N4(850.1μmol g^−1 h^−1)and outperforms most of the reported g-C3N4 catalysts.

Fully-inorganic strontium incorporated CsPbI_(2)Br perovskite solar cells with promoted efficiency and stability

In the present investigation, we fabricated strontium (Sr2+) incorporated CsPbI2Br-based inorganic perovskite solar cells in ambient conditions. The morphology, crystallinity, absorption, elemental composition and photoluminescence analysis of the bare CsPbI2Br and CsPb1-xSrxI2Br perovskite thin films were studied systematically to investigate the role of Sr2+ incorporation. It is observed that the surface morphology of the CsPbI2Br perovskite thin film has been improved by partial substitution of Pb2+ by Sr2+ which facilitates photoactive black phase-stabilization and defect passivation. The champion device having CsPb0.98Sr0.02I2Br composition exhibited a power conversion efficiency (PCE) of 16.61% which is much higher than the bare device (13.65%). Furthermore, our CsPb0.98Sr0.02I2Br-based devices maintain > 85% of its initial efficiency over 100 h in ambient conditions.