Organic/inorganic nanocomposite polymer electrolyte

The organic/inorganic nanocomposites polymer electrolytes were designed and synthesized. The organic/inorganic nanocomposites membrane materials and their lithium salt complexes have been found thermally stable below 200 °C. The conductivity of the organic/inorganic nanocomposites polymer electrolytes prepared at room temperature was at magnitude range of 10(?6) S/cm.

Synthesis and characterization of luminescent organic-inorganic hybrid nanocomposite from polyhedral oligomeric silsesquioxane

A novel polyhedral oligomeric silsesquioxane(POSS)-based organic-inorganic hybrid nanocomposite(EF-POSS) was prepared by Pt-catalyzed hydrosilylation reaction of octahydridosilsesquioxane(T_8H_8,POSS) with a luminescent substituted acetylene(2- ethynyl-7-(4-(4-methylstyryl)styryl)-9,9-dioctyl-9H-fluorene(EF)) in high yield.The hybrid nanocomposite was soluble in common solvents such as CH_2Cl_2,CHCl_3,THF and 1,4-dioxane.Its structure and property were characterized by FTIR, NMR,TGA,UV and PL,respectively.The results show that the hybrid nanocomposite with high thermal stability emits stable blue light as a result of photo excitation and possesses high photoluminescence quantum efficiency(φ_(FL)).

Organic-inorganic Hybrids Towards the Preparation of Nanoporous Composite Thin Films for Microelectronic Application

Silicon containing materials have traditionally been used in microelectronic fabrication. Semiconductor devices often have one or more arrays of patterned interconnect levels that serve to electrically couple the individual circuit elements forming an integrated circuit. These interconnect levels are typically separated by an insulating or dielectric film. Previously, a silicon oxide film was the most commonly used material for such dielectric films having dielectric constants( k ) near 4 0. However, as the feature size is continuously scaling down, the relatively high k of such silicon oxide films became inadequate to provide efficient electrical insulation. As such, there has been an increasing market demand for materials with even lower dielectric constant for Interlayer Dielectric(ILD) applications, yet retaining thermal and mechanical integrity. We wish to report here our investigations on the preparation of ultra low k ILD materials using a sacrificial approach whereby organic groups are burnt out to generate low k porous ORMOSIL films. We have been able to prepare a variety of organically modified silicone resins leading to highly microporous thin films, exhibiting ultra low k from 1 80 to 2 87, and good to high modulus, 1 5 to 5 5 GPa. Structure property influences on porosity, dielectric constant and modulus will be discussed.

Controlled Microstructure and Photochromism of Inorganic-organic Thin Films by Ultrasound

A series of inorganic-organic thin films based on uniformly dispersed nanoparticles of polyoxometalates （POM）entrapped in polyacrylamide （PAM） matrix were prepared by ultrasonic method with different irradiation time.The microstructure, photochromic behavior and mechanism of the films were studied by transmission electron microscopy （TEM）, ultraviolet-visible spectra （UV-VIS） and Fourier transform-infrared spectroscopy （FT-IR）.The microstructure and photochromic properties of the hybrid thin films could be controlled by ultrasound.TEM image revealed that the average size of phosphotungstic acid （PWA） nanoparticles decreased from 20 to 10 nm with the ultrasound irradiation time from 30 to 60 min. After irradiated with ultraviolet light,the transparent films changed from colorless to blue and showed reversible photochromism. The hybrid film, with ultrasound irradiation for 60 min had higher photochromic efficiency and faster bleaching reaction than the one with ultrasound irradiation for 30 min. FT-IR spectra showed that the Keggin geometry of heteropolyoxometalate was still preserved inside the composites, and the interactions between polyanions and polymer matrix increased as the ultrasound time prolonged. It is suggested that the mechanism of the different photochromic properties for the inorganic-organic thin films is the variation of the microstructure and interfacial interactions induced by ultrasound.

Preparation and Optical Patterning of Organic-Inorganic Hybrid Color-Filter Films Using Latent Pigments by Utilizing Photo-Acid-Generator and Microwave Irradiation

Preparation and photo-patterning characteristics of organic-inorganic hybrid thin film containing latent pigment by using photo-acid-generator (PAG) and microwave irradiation have been investigated. The acrylic thin film modified with methoxysilane containing PAG was formed on a glass substrate and irradiated with ultraviolet rays to promote sol-gel reaction by catalytic action of acid which was generated from PAG. And then the film was hardened with microwave irradiation, yielding organic-inorganic hybrid polymer film having hardness, highly transparency and strong adhesion with a glass substrate. Since this reaction only occurred in the optically (UV) irradiated regions, by exploiting the difference between the adhesivenesses of these regions photo-irradiated through photomask with a glass substrate, it was possible to form a patterned film with pitch of 100 to 50 μm by a simple lift-off method. A pigment-containing film using latent pigments (with subtractive three primary colors of coloring materials) and a patterned film were prepared, and it was possible to make these films multi-colored by varying the mixing ratio of the pigments. This multi-colored film-preparation method is effective for simply and efficiently forming a color-filter film by applying optical and microwave irradiation.

The Production of Organic-Inorganic Compound Film-Coated Urea and the Characteristics of Its Nutrient Release

The effect of different concentrations of natural macromolecular compound on the characteristics of nutrient release in the membrane materials of organic-inorganic compound film-coated urea was discussed, and the optimal concentrations for better nutrient release was proposed. The characteristics of nutrient release of film-coated urea were evaluated by soil column leaching experiment. Organic-inorganic compound film-coated urea showed good characteristics of nutrient release, which could be well simulated by Logistic curve. The two parameters in this curve, a and r, can be used to present nutrient release of film-coated urea, and followed the order of B 〉 C 〉 A and C 〈 B 〈 A, respectively, indicating that the release was stronger with the increasing concentration of natural macromolecular compound in the membrane, which implied better controllability of nutrient release. The concentration of 5% of natural macromolecular compound showed better characteristic of nutrient release and can be utilized as a membrane material combined with inorganic mineral powders to develop film-coated slow-release fertilizer.

Thin Film Encapsulation at Low Temperature Using Combination of Inorganic Dyad Layers and Spray Coated Organic Layer

Organic devices have many advantages such as low material consumption and low energy requirements, but they have serious issues regarding long term stability. Hence we need to develop a barrier film which solves this problem. Initially, the organic devices were fabricated on glass and were encapsulated using glass and epoxy (as sealant). Gradually there was a need to shift on to flexible substrates which required encapsulation to be flexible as well. Therefore, the motivation of the work is to develop thin film encapsulation that can be made flexible. The low temperature PECVD grown films of SiOx and SiNxwere used as the barrier film. Alternate inorganic layers (2-dyads) provided barrier of ~10-2 g/m2 day and increasing the number of dyads to five improved the water vapor transmission rate (WVTR) only by one order of magnitude. However, introducing organic layers in this structure resulted in WVTR value of order 10-5 g/m2 day. The organic layers were deposited by spray technique.

An Explosive Organic/Inorganic Hybrid: Synthesis and Thermal Property of Octa(2,4-dinitrophenyl)silsesquioxane

Octaphenylsilsesquioxane(OPhS) was prepared by a modifying method and a new core-shell nanocomposite, octa(2,4-dinitrophenyl)silsesquioxane, [(R_2PhSiO_ 1.5)_8, R=—NO_2, ODNPhS], was synthesized by nitration of OPhS in a mixed acid solution of nitric and sulfuric acids at about 60 ℃. Their molecular structures were determined by DRIFTS, 1H NMR, 13C NMR spectra analysis. The thermal analysis shows that ODNPhS is an explosive that detonates at about 420 ℃.

Layer-by-layer assembly of nanocomposite films with thickness up to hundreds of nanometers

Polyelectrolyte/polyelectrolyte, organic molecule/colloidal CdS and polyelectrolyte/MWCNT films were fabricated via the layer-by-layer assembling technique. The assembled films were characterized by UV-vis spectrophotometer, X-ray diffractometry, nano profilometer and scanning electron microscopy. The results demonstrate that the layer-by-layer assembling technique can be used to make the nanoscaled films from polyelectrolytes and thicker composite films from suitable precursor materials. Both organic molecule/colloidal CdS films and PEI/MWCNT films with thickness of hundreds of nanometers were obtained. For the organic molecule/colloidal CdS films, a reasonable explanation for the result is that both the organic molecules and the CdS particles aggregate in the films. For the PEI/MWCNT films, obviously, it is the MWCNT that makes the great contribution to the film thickness.

用于柔性电子器件的有机/无机薄膜封装技术研究进展

有机/无机薄膜封装技术被广泛用于有机发光二极管(OLED)、量子点显示及有机光伏等领域,是一种新型的柔性封装技术。综述近年来有机/无机薄膜封装技术的发展趋势,首先概述了传统硬质盖板封装方式与薄膜封装方式的发展及其优缺点。其次,系统地总结了有机/无机薄膜的制备方法,如原子层沉积、等离子体化学气相沉积等,详细阐述了不同制备方法的原理及其应用。再次,讨论了薄膜的微观缺陷、内应力,以及材料界面工程对有机/无机薄膜封装性能的影响,分析总结了有机/无机封装薄膜制备的技术要点,如采用基底表面预处理、引入中性层、调节层间应力等方式获得优质的封装薄膜。最后,探究了有机/无机封装薄膜的内在阻隔机理,提出气体在有机/无机薄膜中的传输方式以努森扩散为主,并总结了提高薄膜封装的策略,即延长气体扩散路径、“主动”引入阻隔基团及薄膜表面改性。提出了未来薄膜封装技术面临的问题,拟为柔性电子器件封装技术的发展提供一定参考。

旱地长期覆盖下土壤团聚体有机碳及无机碳的变化规律

[目的]研究不同覆盖方式对黄土高原土壤团聚体内部有机碳、无机碳分布的影响,为研究覆盖条件下土壤团聚体碳固持机制提供理论依据,推动旱地农田土壤的高效管理。[方法]依据2012年起实施的长期定位试验,以种植“先玉335”春玉米的耕作土壤为研究对象,设置秸秆覆盖(SM)、地膜覆盖(FM)、无覆盖(CK)3个处理,通过湿筛法分析不同粒径团聚体中碳分布特征及其酶活性。[结果]①与无覆盖相比,秸秆覆盖显著增加了各个粒径团聚体有机碳含量(p<0.05),增加幅度为4.8%~18.2%;而地膜覆盖则显著降低了各粒径有机碳含量(p<0.05),降低幅度为1.2%~7.1%。同一处理下,团聚体有机碳含量随着粒径的减小先上升后降低。各粒径中有机碳储量在秸秆覆盖下高于地膜覆盖和无覆盖处理。②地膜覆盖相较无覆盖显著增加了团聚体中的无机碳含量(p<0.05),增加幅度为4.3%~5.9%;秸秆覆盖降低了无机碳含量,但差异不显著。同一处理下团聚体各粒径中无机碳含量随着粒径的减小先上升后降低。地膜覆盖显著降低了>2 mm团聚体粒径的无机碳储量,但显著提高了2~0.25 mm粒径的储量(p<0.05)。③秸秆覆盖显著增加了团聚体中的总碳含量,增加幅度为7.1%~12.4%;同时地膜覆盖和秸秆覆盖都显著提高了2~0.25 mm粒径的总碳储量(p<0.05)。④秸秆覆盖提高了团聚体中与碳循环相关酶的活性,地膜覆盖则对其产生降低的影响。相关性分析表明有机碳、总碳含量与碳循环相关的酶活性呈显著正相关关系(p<0.05)。[结论]秸秆覆盖和地膜覆盖显著影响碳库在团聚体中的变化,其中秸秆覆盖在提升土壤地力,增加土壤碳的固定方面优于地膜覆盖,具有较大优势。

Photoconductive properties of organic-inorganic Ag/p-CuPc/n-GaAs/Ag cell

A thin film of copper phthalocyanine（CuPc）,a p-type semiconductor,was deposited by thermal evaporation in vacuum on an n-type gallium arsenide（GaAs） single-crystal semiconductor substrate.Then semitransparent Ag thin film was deposited onto the CuPc film also by thermal evaporation to fabricate the Ag/p-CuPc /n-GaAs/Ag cell.Photoconduction of the cell was measured in photoresistive and photodiode modes of operation. It was observed that with an increase in illumination,the photoresistance decreased in reverse bias while it increased in forward bias.The photocurrent was increased in reverse bias operation.In forward bias operation with an increase in illumination,the photocurrent showed a different behavior depending on the voltage applied.

亚表层培肥结合地膜覆盖对河套灌区盐碱土壤有机碳和无机碳的影响

土壤有机碳(SOC)和无机碳(SIC)是参与全球碳循环的重要碳库。亚表层(10~30 cm)培肥结合地膜覆盖措施是干旱区优化盐碱土壤物理结构和调控土壤水盐环境的有效措施,然而关于其如何调控0~60 cm土体SOC、SIC分布及其与土壤相关理化性状的关系尚不明确。本研究基于内蒙古河套灌区盐碱土壤6年的田间微区试验,设置常规对照(CK)、亚表层(10~30 cm)有机培肥(OM)、地膜覆盖(PM)、亚表层有机培肥+地膜覆盖(OM+PM)4个处理,测定了2019—2020年0~60 cm剖面SOC、SIC、全碳(TC)含量以及土壤理化指标(土壤水分、盐分、pH和全氮),分析了TC、SOC、SIC变化特征及其影响因素。结果表明:OM和OM+PM处理较CK和PM处理显著增加0~40 cm土层SOC含量31.9%~195.6%(P<0.05),显著增加40~60 cm SOC含量33.7%~49.4%(P<0.05,仅2020年),但显著降低0~40 cm SIC含量9.9%~35.0%(P<0.05)。基于SOC和SIC的变化,OM+PM较CK处理显著增加2019年20~60 cm TC含量10.4%~39.4%(P<0.05),并显著增加2020年0~20 cm TC含量13.0%(P<0.05)。回归分析结果进一步说明,覆膜条件下补充亚表层培肥,使总碳库变化的主导因素由SIC转变为SOC。冗余分析结果表明土壤理化性质是影响土壤碳库的主要因素(解释度为60.7%~91.9%),其中全氮和pH是0~40 cm土壤碳库的主要影响因子,而40~60 cm土壤碳库主要受盐分和pH影响。相关性分析结果表明SOC与SIC表现为完全相反的变化规律,其中SOC与全氮极显著正相关,与盐分和pH呈极显著负相关(P<0.01);SIC与全氮呈极显著负相关,与pH呈极显著正相关(P<0.01)。因此,亚表层培肥结合地膜覆盖可以通过增加SOC来弥补SIC的损失进而实现碳积累,是该区域盐碱地增加固碳潜力的有效措施。

科学研究成果融入无机化学实验教学——[(CH_(3))_(3)NCH_(2)Br]_(2)-ZnBr_(4)的合成及铁弹畴

根据本课题组科研成果设计了一个通过有机小分子与无机盐在酸性条件下组装,获得具有自发应变的有机-无机杂化金属卤化物,[TMBM]_(2)-ZnBr_(4)(TMBM=(CH_(3))_(3)NCH_(2)Br),的化学实验。通过制备薄膜材料,在偏光显微镜下观察铁弹畴与温度的关系。本实验可以锻炼学生对化学实验基本操作的运用,掌握仪器设备的使用,增强自主学习和团队合作能力,激发学习兴趣和热情,开拓科学研究视野,丰富学科知识,提升学科素养。

仿贝壳自组装纳米复合薄膜的制备及结构表征

利用超分子自组装方法在普通玻璃表面制备了仿贝壳有机-无机复合纳米薄膜.采用X射线衍射仪、傅立叶红外光谱仪、紫外-可见吸收光谱仪、透射电子显微镜对薄膜结构进行了表征.结果表明这种薄膜具有有机-无机有序交替的层状纳米复合结构,聚合前层间距为4.20nm,聚合后层间距为3.91nm.无机层由TiO2纳米微粒构成.

复合相变储热材料的研究与发展

系统概括和评述了复合相变材料的制备方法及其研究进展 ,并介绍了研制有机 /无机纳米复合相变储热材料的创新思路及初步研究成果 ,提出有机

可溶性PI/SiO_2纳米复合材料中SiO_2微相结构变化的研究

选取可溶性聚酰亚胺 ( PI)作为有机高聚物基体 ,通过正硅酸四乙酯 ( TEOS)在聚酰胺酸 ( PAA)的N-甲基 - 2 -吡咯烷酮 ( NMP)溶液中进行溶胶 -凝胶反应 ,制备出新型的聚酰亚胺 /二氧化硅 ( PI/ Si O2 )纳米复合材料。并用 UV- Vis、FT- IR、SEM和光子相关法等对其溶胶 -凝胶转变过程、二氧化硅微相结构的变化进行了研究 ,并对溶液中粒子间的团聚行为作了进一步探讨。结果表明随着处理温度的升高 ,PAA逐步亚胺化 ,同时 TEOS水解后的硅羟基 ( Si- OH)逐步缩合 ,由线型结构向环状结构过渡 ,原位生成Si O2 凝胶网络。实验结果还发现热处理温度的升高对二氧化硅无机粒子的尺寸无明显的影响 ,而光子相关法结果则表明颗粒表面活性 Si-

苯乙烯─马来酸酐共聚物／聚硅氧烷纳米尺度复合材料的研究

用溶胶－凝胶方法制备了苯乙烯、马来酸酐和ｒ－缩水甘油丙基醚三甲氧基硅烷复合材料．利用红外光谱、动态力学分析、小角Ｘ－射线散射和原子力显微镜等手段研究了这种材料的结构与性能．结果表明，这种材料以三维网络和纳米微相分离的形式存在，其力学性能和耐热性能较苯乙烯－马来酸酐共聚物有大幅度提高，透明且不溶于丙酮．

无机-有机纳米复合材料研究进展

对有机 -无机纳米复合材料的结构、性质和应用等方面的研究进展进行了综述。