超长余辉蓄能型发光涂料研究进展

介绍了国内外发光涂料的发展动态及蓄能型发光材料的种类、性能特点     

水性长余辉蓄能发光涂料的研制

以纯丙烯酸乳液为基料。以长余辉发光粉为颜料制备成长余辉蓄能发光涂料。讨论了乳液的选择、发光颜料的用量、粒径及涂膜厚度对余辉的影响。     

稀土铝酸盐长余辉蓄能发光涂料的研究进展

介绍了铝酸盐长余辉蓄能发光涂料中的主要组分发光材料的特点、物理化学改性以及树脂的选择,综述了国内外长余辉蓄能发光涂料的开发动向以及应用现状,探讨了长余辉蓄能发光涂料存在的问题和发展趋势。     

长余辉蓄能发光涂料的研制

采用C5石油树脂乳液和自制CaSiO3:Eu2+,Dy3+硅酸盐蓄能发光材料制备长余辉蓄能发光涂料,试验考察了蓄能发光材料加入量对蓄能发光涂料的光学性能和涂料原有性能的影响,并对蓄能发光涂料产品进行性能分析。结果表明:蓄能发光材料加入量在25%左右时,蓄能发光涂料的余晖时间可达8 h以上,同时又能满足涂料原有性能的要求,如稳定性、耐冲击性和耐水性等。蓄能发光涂料的XRD图与CaSiO3:Eu2+,Dy3+的XRD图之间没有明显差别,表明C5石油树脂和助剂填料的加入并没有改变CaSiO3:Eu2+,Dy3+的晶格结构和发光特性。     

新型稀土长余辉蓄能材料及其在涂料中的应用

综述了长余辉蓄能材料和发光涂料的发展过程和最新进展,对发光涂料的制备工艺和应用领域作了介绍,并指出了发光涂料研究与发展的方向。     

蓄能发光功能涂料研究及其应用

介绍了蓄能发光涂料中所用发光材料的种类与性能特点，阐述了目前稀土铝酸盐长余辉蓄能发光材料的研究成果及作为涂料添加剂的表面改性处理；列举了蓄能发光涂料在建筑装饰、消防安全等领域的应用，对其存在的问题和发展趋势进行了探讨；同时简述了相关的研究。     

环境友好水性蓄能型发光涂料的制备

以苯丙乳液为主要成膜物,碱土硅酸盐发光粉为主要颜料,水为溶剂,加入其它助剂,制成一种环境友好型水性长余辉蓄能型发光涂料,讨论了乳液的选择、发光粉的粒径和加入量以及助剂对涂料性能的影响。     

蓄能发光涂料的研究及应用

主要介绍了蓄能发光涂料的特点、国内外研究情况及涂料的制备技术现状和存在问题。稀土激活碱土金属铝酸盐类涂料作为当前最具代表性的蓄能发光涂料品种,其起始亮度高、余辉时间长且安全环保,具有极好的应用前景。     

高发光长余辉发光涂料的制备及性能

按化学式Sr0.994Al2O:Eu2+0.002,Dy3+0.004准备原料,并添加碳酸氢铵作为成孔剂,采用高温固相反应法制备了高发光长余辉材料.探究了成孔剂对长余辉材料晶体结构及余辉性能的影响.以高发光长余辉材料、含氟丙烯酸树脂、颜填料和助剂制备出标线涂料.结果表明,成孔剂的加入不改变长余辉材料的晶体结构,但能有效...     

长余辉蓄能发光材料的研究及应用

随着现代科学技术的迅猛发展，发光材料已从简单的电致照明材料发展成为可由阴极射线、X射线、光、声、化学反应能、生化反应能和机械能等激发的而被应用于超薄电视、微型监视器、高负荷荧光灯、等离子体显示、液晶显示、精密分析仪和探头等高科技领域的主导材料而渗透到人类生活的每个角落。特别是     

蓄能发光材料的新突破

蓄能发光新材料的市场开发前景广阔。作为一种添加剂,其所特有的高亮度、快吸光、长蓄光、化学稳定性好及耐候性强等优良理化性能,使其可广泛应用建筑装饰、交通运输、消防安全、电子通信、电力电器、仪器仪表等各个领域,是21世纪特有发展前途和广阔市场前景的装饰发光材料。它的广泛应用开辟了一个省电、节能、高效的新天地。     

聚乙二醇相变储能材料研究进展

聚乙二醇相变材料是一类相变焓较高、热滞后效应低的储能材料。本文综述了聚乙二醇相变储能材料的研究进展,重点论述了其制备方法、应用及展望。     

NIR-I/III afterglow induced by energy transfers between Er and Cr codoped in ZGGO nanoparticles for potential bioimaging

Herein, Cr³⁺ and Er³⁺ codoped zinc gallogermanate (ZGGO) nanoparticles with average size of ~60 nm was synthesized via a hydrothermal path. It was found that near infrared (NIR)-III (~1540 nm) afterglow was realized in ZGGO:Cr³⁺,Er³⁺ nanoparticles based on the successive energy transfer (ET) from Cr³⁺ to Er³⁺ after the stoppage of low-dose (60 mSv) X-ray irradiation. Meanwhile, the upconverted afterglow at 696 nm was produced via the ET from Er³⁺ to Cr³⁺ under different NIR light (808, 980, and 1532 nm) irradiations. Our results demonstrated that an X-ray pre-irradiation and a subsequent 980-nm light re-excitation might be a good strategy for realizing potential bioimaging. In particular, local-tissue NIR-I afterglow imaging using Cr³⁺ and Er³⁺ codoped ZGGO nanoparticles can be easily acquired by one-step 980-nm laser radiation. Furthermore, NIR-I/III afterglow mechanisms of ZGGO:Cr³⁺,Er³⁺ nanoparticles after stopping X-ray or different NIR lights (808, 980, and 1532 nm) irradiations were given.     

石膏基复合相变储能材料的研究进展

建筑能耗、工业能耗和交通能耗是能源消耗的主要方式。其中,建筑能耗约占能源消耗的40%左右,建筑能耗的持续上升会增加碳排放和加速化石能源的消耗,因此提升建筑材料的保温节能性能逐渐成为建筑材料领域的研究热点。储热技术不仅可以降低建筑能耗,还可以减少环境污染。相变储能材料具有优异的储放热能力,是实现热能储存以及温度控制的重要技术手段,在建筑节能领域有广阔的应用前景。该文主要综述了石膏基复合相变储能材料的研究进展,根据石膏基相变材料的不同,分析归纳了石膏基有机相变材料和石膏基复合相变材料,介绍了浸渍法、多孔材料吸附法、微胶囊法等制备石膏基复合相变储能材料的方法和机理,以及影响石膏基相变储能材料的因素。最后,展望了石膏基相变储能材料的研究方向。     

添加碳素复(混)合相变储热材料的研究及应用进展

相变储热材料因具有储热密度大、相变温度变化小且过程易控制等优点而在许多领域具有重要应用。但传统的相变储热材料存在导热系数低及固-液相变过程中液态泄漏问题,阻碍了其实际应用。碳材料如石墨、碳纤维、碳泡沫和膨胀石墨,他们都具有高导热系数、低密度和良好的化学稳定性。将碳材料添加到相变储热材料中或与相变储热材料进行复合,从而构成碳素复(混)合相变储热材料,储热材料的导热系数及其性能可明显提高。本文综述了碳素复(混)合相变储热材料的研究进展。利用膨胀石墨的多孔特性吸附有机物制备膨胀石墨基复合相变储热材料,其储热密度大、导热系数高、性能稳定、成本低且在固-液相变过程中没有液态的流动性问题,是未来研究和应用最重要的碳素复合相变储热材料。     

新型海洋材料在储能领域的应用进展

能源与环境是世界发展的两大议题。海洋资源丰富,蕴含结构多样、性质丰富的生物质材料、矿物材料等,在储能领域展现出良好的应用前景。对新型海洋材料,如海洋生物质材料、衍生碳功能材料和海洋矿物材料等在储能领域的应用做了系统评述。海洋生物质材料自然界储量丰富、环境友好,被广泛应用于储能体系的黏结剂等功能组分;海洋生物质碳化材料富含丰富的孔隙结构,作为先进电极显示出优异的应用潜力;海底矿物材料被作为电极材料和模板材料应用于储能体系中,海底矿物的开采是其未来应用的重要技术保障。对新型海洋材料的类型以及在储能领域中的应用形式做了总结,并对海洋与能源的交叉发展做了展望,以期进一步推动新型海洋材料的可持续利用。     

热能储存材料研究进展

热能储存材料用于储热或储冷，节能效果显著。文中综述了热能储存材料研究的新进展，介绍了热能储存材料的分类、性能及新型储热、储冷材料。     

Sustainable lignin-based polyols as promising thermal energy storage materials

Six lignin-based polyols (LBPs) have been prepared by cationic ring opening polymerization of an oxirane in the presence of an organosolv lignin in tetrahydrofuran (THF) as reaction media and co-monomer. The prepared LBPs have been characterized and tested for the first time as phase change materials (PCMs) for thermal energy storage (TES) at low temperature. It was found a strong influence of the LBPs composition on their performance to storage thermal energy. Thus, LBPs with higher THF wt% content and lower oxirane/THF mass ratio exhibit the highest latent heats. Furthermore, a clear inversely proportional trend between the oxirane/THF mass ratio and the melting temperatures of the prepared LBPs was noticed. Among the prepared LBPs, the highest obtained latent heat was 53.7 J/g demonstrating the potential application of lignin as feedstock for PCMs preparation. To the best of our knowledge, this is the first time that a biomass derived PCM based on lignin has been studied and considered for TES applications at low temperature. LBPs show energetic solid–liquid transitions that point out their promising potential as bio-PCMs. This work paves the way to introduce new bio-based PCMs from lignin in TES systems, for example, in a more sustainable construction sector.     

Preparation and characterization of nano-encapsulated n-tetradecane as phase change material for thermal energy storage

Nanocapsules used as phase change material (PCM) were prepared by using in situ polymerization methods. N-Tetradecane was used as the core material. Urea and formaldehyde were used for the shell polymerization. Sodium dodecyl sulfate was used as the emulsifier and resorcin was used as the system modifier. The morphology of the nanocapsules was observed by a scanning electronic microscope (SEM). The thermal properties were investigated by a differential scanning calorimeter (DSC) and a thermogravimetry analysis (TGA). The SEM analysis indicated that the nanocapsules had general size of about 100 nm and the core material was well encapsulated. DSC analysis indicated that the mass content of n-tetradecane was up to 60%, which resulted in a high latent heat of fusion of 134.16 kJ/kg. TGA showed the thermal stability of the nanocapsules could be improved by the additives (NaCl) used in the polymerization. The nanocapsules could be applied for thermal energy storage and heat transfer enhancement.     

Design and synthesis of a novel core-shell nanostructure developed for thermal energy storage purposes

This work develops a novel plasma sprayable metal-ceramic core-shell nanostructure, which is able to store thermal energy during heating. In the course of seeking the desirable core material, a diverse set of criteria including low melting point, wide temperature range from melting to boiling point, low coefficient of thermal expansion and high heat of fusion besides the low cost for large scale production was taken into account which finally led us to Tin (Sn) as the most suitable material. To protect Sn core against oxidation, diffusion and repetitive heating/cooling cycles and to preserve the integrity of core-shell nanostructure, ZrO₂ shell was selected as the protective heat resistant shell. However, due to the severe thermal mismatch between Sn core and ZrO₂shell, direct coating of ZrO₂ on Sn is not possible. To overcome this issue and minimizing thermally induced stresses during heating/cooling cycles, a SiO₂ interlayer was used. As is evidenced by XRD, SEM, EDS and TEM, the designed Sn@SiO₂@ZrO₂core-shell nanostructures are successfully synthesized in this work. The formation of its core-shell structure was evidenced by EDS mapping results. The powder product exhibits an agglomerated nature. SEM results indicate that SiO₂ and ZrO₂ shells are porous. The final powder particles are formed from the nanoscale components including nanoscale particulate SiO₂ and ZrO₂ shells. DTA results clearly show the melting of the core on heating and its successive solidification on cooling. Characterization of the thermoresponse of the core-shell nanostructures demonstrates that they exhibit good heat storage characteristics and high thermal reliability for latent-heat storage.