Ionotronic Luminescent Fibers,Fabrics, and Other Configurations

A family of recently developed devices, hydrogel ionotronics, uses hydrogels as ionic conductors, and uses hydrophobic elastomers as dielectrics. This development has posed a challenge: integrate hydrogels and hydrophobic elastomers—in various manufacturing processes—with strong, stretchable, and transparent adhesion. Here, a multistep dip-coating process is described to enable hydrogel ionotronics of diverse configurations. In doing so, a hydrophobic surface is primed to let a hydrophilic precursor wet it, and then polymers of different layers are interlinked with covalent bonds. As a representative example, an ionotronic luminescent fiber that can be lengthened to ≈2.5 times its original length and keeps functioning after 10 000 cycles of stretching is fabricated. A luminescent fabric that displays movable pixels and other configurations is also demonstrated. The proposed method of fabrication expands the design space for hydrogel ionotronics.     

Research on the release of gases during the bituminous coal combustion under low oxygen atmosphere by TG–FTIR

The recirculation of boiler tail gas with a low oxygen concentration can reduce NO_x emissions. Experiments on bitumite combustion were carried out using simultaneous TG/FTIR dynamic runs with different atmospheric compositions, 2%, 6%, 10%, and 12% O₂. Reducing oxygen concentrations led to the burnout temperature shifting to higher temperature and coal combustion becoming more challenging. The reducing gas (CO, CH₄) emissions were abundant between 330 °C and 690 °C. However, along with the reduction in oxygen, CH₄ intensity increased, while the CO precipitation peak lowered. Kinetic parameters were defined using the Coats-Redfern model. According to the data obtained, bitumite combustion activation energy increased as oxygen concentration increased.     

银苍玉洱 千年喜洲

“水光万顷开天镜，山色四时环翠屏”是云南大理苍山洱海地区的精彩写照。古城大理，名镇喜洲，历史悠远漫长，文化灿烂丰富，是人类宜居的风水宝地。地处大理古城北边的喜洲，物华天宝，人杰地灵，是大理文化的发祥地之一，是白族千年史的缩影，也是大理历史文化名城的重要组成部分。     

QT500表面等离子喷涂8YSZ热障涂层TGO的残余应力状态及数值分析

分别采用超音速火焰喷涂(HOVF)和等离子喷涂(APS)在QT500球墨铸铁基体上制备Co Ni Cr Al Y粘结层(BC)和8YSZ陶瓷隔热层(TC),研究了试样在1050℃高温环境中经过2.5、8、15、50、100 h恒温氧化后体系的应力情况。利用扫描电子显微镜(SEM)对热生长氧化物(TGO)的微观形貌进行观察与分析,并用拉曼荧光光谱仪(RFS)分析了其应力的分布及变化规律,并通过力学模型进行了残余应力的数值计算。结果表明:由陶瓷层与粘结层之间的热失配而导致TGO中产生残余压应力,其最大值范围为1.9557~1.9603 GPa;残余压应力在高温氧化初始阶段逐渐减小,至15 h达到最小值,随之逐渐增大后趋于稳定;在恒温阶段,θ-Al2O3转变为α-Al2O3所引起的体积收缩是TGO中残余应力减小并趋于稳定的直接原因。     

环境叙事下的游牧空间在建筑创作中的演绎——以宁波宁亿生活美学馆概念设计为例

随着科技的进步,现代主义建筑中人们越来越关注性能和效率导致建筑与环境、历史、当代文化的割裂.而游牧空间能协调并重组建筑与环境之间的各种差异性元素,为环境叙事提供整合差异性的空间基础,并赋予当代建筑与环境之间创造性的增值.本文以宁波宁亿生活美学馆概念设计为例,尝试将环境叙事下的游牧空间描述性的定义转译为具有开放、多元、流动、生成等特征的适应建筑与空间环境关系发展需求的"游牧空间".     

A Brown Mesoporous TiO2‐x/MCF Composite with an Extremely High Quantum Yield of Solar Energy Photocatalysis for H2 Evolution

A brown mesoporous TiO_2‐x/MCF composite with a high fluorine dopant concentration (8.01 at%) is synthesized by a vacuum activation method. It exhibits an excellent solar absorption and a record‐breaking quantum yield (Φ = 46%) and a high photon–hydrogen energy conversion efficiency (η = 34%,) for solar photocatalytic H₂ production, which are all higher than that of the black hydrogen‐doped TiO₂ (Φ = 35%, η = 24%). The MCFs serve to improve the adsorption of F atoms onto the TiO₂/MCF composite surface, which after the formation of oxygen vacancies by vacuum activation, facilitate the abundant substitution of these vacancies with F atoms. The decrease of recombination sites induced by high‐concentration F doping and the synergistic effect between lattice Ti³⁺–F and surface Ti³⁺–F are responsible for the enhanced lifetime of electrons, the observed excellent absorption of solar light, and the photocatalytic production of H₂ for these catalysts. The as‐prepared F‐doped composite is an ideal solar light‐driven photocatalyst with great potential for applications ranging from the remediation of environmental pollution to the harnessing of solar energy for H₂ production.