Structural, Optical and Luminescence Properties of ZnO Thin Films Prepared by Sol-Gel Spin-Coating Method： Effect of Precursor Concentration

Transparent zinc oxide（ZnO） thin films are fabricated by a simple sol-gel spin-coating technique on glass substrates with different solution concentrations（0.3-1.2 M） using zinc acetate dehydrate [Zn（CH_3COO）_2·2H_2O] as precursor and isopropanol and monoethanolamine（MEA） as solvent and stabilizer, respectively. The molar ratio of zinc acetate dehydrate to MEA is 1.0. X-ray diffraction, ultraviolet-visible spectroscopy and photoluminescence spectroscopy are employed to investigate the effect of solution concentration on the structural and optical properties of the ZnO thin films. The obtained results of all thin films are discussed in detail and are compared with other experimental data.

Study progression in application of process analytical technologies on film coating

Film coating is an important unit operation to produce solid dosage forms,thereby,the monitoring of this process is helpful to find problems in time and improve the quality of coated products.Traditional methods adopted to monitor this process include measurement of coating weight gain,performance of disintegration and dissolution test,etc.However,not only do these methods cause destruction to the samples,but also consume time and energy.There have recently emerged the applications of process analytical technologies(PAT)on film coating,especially some novel spectroscopic and imaging technologies,which have the potential to real-time track the progress in film coating and optimize production efficiency.This article gives an overview on the application of such technologies for film coating,with the goal to provide a reference for the further researches.

Aerosol deposition technology and its applications in batteries

Aerosol deposition(AD)method is a kind of additive manufacturing technology for fabricating dense films such as metals and ceramics at room temperature.It resolves the challenge of integrating ceramic films onto temperaturesensitive substrates,including metals,glasses,and polymers.It should be emphasized that the AD is a spray coating technology that uses powder without thermal assistance to generate films with high density.Compared to the traditional sputter-based approach,the AD shows several advantages in efficiency,convenience,better interfacial bonding and so on.Therefore,it opens some possibilities to the field of batteries,especially all-solidstate batteries(ASSBs)and draws much attention not only for research but also for large scale applications.The purpose of this work is to provide a critical review on the science and technology of AD as well as its applications in the field of batteries.The process,mechanism and effective parameters of AD,and recent developments in AD applications in the field of batteries will be systematically reviewed so that a trend for AD will be finally provided.

Optimization of preparation process of cationic liposome nanoparticles containing Survivin-siRNA and osthol

Objective:To prepare cationic liposome nanoparticles loaded with survivin-siRNA and Cnidium monnieri based on the ability of liposomes to contain both water-soluble and lipid soluble components.Methods:The preparation technology of Osthol cationic liposomes was optimized by orthogonal test with membrane material ratio,drug lipid ratio,ultrasonic time and steaming temperature as factors.The volume ratio of HA-siRNA to protamine and the ratio of HA-siRNA protamine complex to liposome were investigated by control variable method with potential and particle size as indexes.The particle size and zeta potential were measured by potentiometric particle size analyzer,and the shape was observed by transmission electron microscope;The absorbance of different concentrations of FAM-Survivin-siRNA standard solution was measured by microplate analyzer,and the entrapment efficiency of cationic liposomes loaded with FAM-Survivin-siRNA and osthole was calculated.Results:The optimum preparation conditions of osthole loaded cationic liposomes were as follows:the ratio of membrane to material was 3:1,the ratio of drug to lipid was 1:5,the steaming temperature was 30℃,the ultrasonic time was 70 min,and the encapsulation efficiency was 78.34%.The optimum preparation conditions of osthole loaded cationic liposomes loaded FAM-Survivin-siRNA were as follows:the volume ratio of Survivin-siRNA to protamine was 1:1,Protamine complex 25μg.Add 50μL cationic liposomes.The particle size is 132.3±0.2nm,zeta potential is 43.15±0.05mv,and its shape is irregular round;According to the standard curve,the entrapment efficiency of cationic liposome nanoparticles co loaded with Survivin-siRNA and osthole was 81.34±0.041%.Conclusion:The prepared cationic liposome nanoparticles loaded with Survivin-siRNA and osthole have good encapsulation efficiency,particle size and zeta potential.

Capillary Zone Electrophoretic Separation of Basic Proteins with Coated Columns Prepared by Sol-Gel Technology

Coated capillary columns were prepared by sol-gel technology and used in the separation of basic proteins with capillary zone electrophoresis. The results indicated that a significant decrease in protein adsorption was obtained and EOF was also diminished to zero in the pH range of 3-10.

Technology of antique imitation for surface of nonmetal artworks

Two different technologies,electro-brush plating and arc spraying,were employed to deposit copper film and brass coating on the surface of nonmetal artworks,respectively. The principles of the oxidizing corrosion and coloring were researched. The nonmetal artworks attain vivid and ancient bronze effect by the surface deposition and surface coloring processing. By using this technology,the problems of difficulty-to-plating copper and difficulty-to-archaizing for the large outdoor sculptures and other artworks can be solved,and it has prospective application due to low investment.

先进航空发动机高温功能涂层研究进展

航空发动机是飞机的“心脏”。先进航空发动机正在向高推重比、高效率、低油耗和长寿命方向发展。以热障涂层、热/环境障复合涂层、高温隐身涂层等为代表的高温功能涂层应用于航空发动机关键热端部件,起着提升发动机服役性能、服役寿命和安全可靠性的重要作用。本文以热障涂层、热/环境障复合涂层、高温隐身涂层等为例,系统概述了近年来国内外以及北京航空航天大学在高温功能涂层材料设计、涂层制备科学与技术、涂层性能评价表征等方面的研究进展,并展望了先进航空发动机新型高温功能涂层所面临的挑战和发展动向。未来先进高温功能涂层的研究重点将集中在多功能复合涂层、极端环境适应性和工艺适配性等方面。

白屈菜总生物碱缓释片制备工艺研究

目的:以羟丙基甲基纤维素为缓释材料制备白屈菜总生物碱缓释薄膜衣片解决白屈菜有效成分药物浓度不稳定的缺点,并建立可靠的含量测定方法。方法:采用单因素实验对白屈菜总碱缓释薄膜衣片制备工艺进行筛选,以释放度为依据;采用高效液相色谱法(HPLC)建立了白屈菜总碱缓释薄膜衣片中血根碱的含量测定方法。结果:优化的缓释片工艺处方:30%白屈菜总碱提取物、30%HPMC、20%可压性淀粉、10%乳糖、10%微晶纤维素,挤压制粒,加1%硬脂酸镁,压片,即得。结论:该工艺制得白屈菜总碱缓释片释药曲线平缓,缓释效果良好,方法简单易行,所得薄膜衣片外观和可压性良好。

热障涂层材料制备技术的研究进展及失效分析

热障涂层具有良好的隔热效果和抗高温氧化性能,应用于航空发动机可以显著提高高温部件的使用温度和寿命。先进航空发动机的发展对热障涂层陶瓷面层材料的防护效果和使用寿命提出了更高的要求。综述了先进航空发动机热障涂层体系的研究进展,对近年来国内外热障涂层的陶瓷层和粘结层材料体系、制备技术进行了详细介绍,对涂层失效进行了分析,展望了下一代高性能航空发动机热障涂层的研究和应用前景。

航空发动机涡轮叶片热障涂层的现状与发展

热障涂层的研究对提高航空发动机涡轮叶片的工作效率和服役时间具有重要意义。本文重点介绍了热障涂层的结构、材料分类、制备及后处理技术、失效机制方面的研究现状,并对其未来发展进行了展望。高熵陶瓷材料等新型陶瓷材料因其优异的热稳定性及综合力学性能,具有良好的应用前景。激光表面改性技术具有效率高、形变小、局部选区处理等优势,可进一步提高热障涂层的安全可靠性。后续热障涂层的研究将聚焦高熵陶瓷材料、功能梯度材料等的研究及应用,充分采用数值分析及建模等深入研究涂层的失效与防护机制,为航空发动机涡轮叶片的发展奠定基础。

骨痛消涂膜剂制备工艺优化及其质量评价

目的优化骨痛消涂膜剂制备工艺,并进行质量评价。方法在单因素试验基础上,以甘油、聚丙烯酸树酯、三乙酸甘油酯、吐温-80用量为影响因素,成膜时间、成膜性、柔韧性、均匀度、黏稠度、表面有无气泡的综合评分为评价指标,星点设计-效应面法优化制备工艺。HPLC法测定雪上一枝蒿甲素含量。结果最佳条件为聚丙烯酸树脂用量41.86%,三乙酸甘油酯用量2.99%,甘油用量5.78%,吐温-80用量2.96%,综合评分为8.93分。雪上一枝蒿甲素在0.017~0.544 mg/mL范围内线性关系良好(r=0.9997),3个水平平均加样回收率分别为99.05%、98.81%、98.92%,RSD分别为0.80%、0.45%、1.07%。结论该方法简便准确,重复性好,可用于骨痛消涂膜剂的制备和质量控制。

刀具涂层技术研究现状和发展趋势

随着刀具涂层制备技术的发展,刀具的应用领域和适用范围越来越广。涂层的应用大大降低了切削过程中的切削力和切削热,有效提高了刀具的切削效率和切削寿命。本文总结了刀具涂层的特点,阐述了刀具涂层的常用制备工艺及其优缺点,并对刀具涂层的材料和结构进行了分析和总结,阐述了常见刀具涂层的优缺点及相应的研究进展。通过对优化刀具涂层性能方法进行总结,为后续刀具涂层的的研究方向提供了思路。

钛酸铋钠基压电材料制备技术研究进展

钛酸铋钠(BNT)基压电材料因具有较好的电学性能以及高居里温度等优点,成为了压电材料领域的研究热点之一。如何制备出性能优异的钛酸铋钠基压电材料,是满足各个领域应用要求的重要环节。重点综述了近年来钛酸铋钠基压电材料制备技术的研究进展,从固相烧结、放电等离子烧结以及微波烧结等角度对其烧结技术进行论述;从溶胶-凝胶、脉冲激光沉积和射频磁控溅射等角度对其薄膜制备技术进行综述;对热喷涂制备压电涂层的机理和工艺进行总结。结果表明,烧结温度是影响块体材料结构和性能的关键因素,其中放电等离子烧结与微波烧结相较于传统的固相烧结能够有效控制材料的烧结温度;在钛酸铋钠薄膜的制备中对沉积温度、氧气压力以及退火温度的控制可以有效提高薄膜电学性能;热喷涂制备的钛酸铋钠涂层通过热处理工艺能够改善涂层的电学性能,并且热喷涂能够在复杂零件表面实现压电涂层的可控制备,其中钛酸铋钠压电陶瓷薄膜和涂层的制备扩展了其应用范围。最后,展望了压电陶瓷材料技术的未来发展趋势,为压电材料制备技术的研究提供了一定的参考。

壳聚糖基涂膜技术在草莓贮藏保鲜中的应用

草莓作为一种高营养、高价值的水果,其易腐性一直是贮藏和运输过程中的主要挑战。为了延长草莓的保鲜期,减少因贮藏不当造成的损耗,壳聚糖基涂膜技术作为一种天然、安全、环保的保鲜方法,逐渐受到广泛关注。本文通过研究壳聚糖基涂膜技术在草莓贮藏保鲜中的最新研究进展,详细探讨壳聚糖基涂膜技术的保鲜机制、配方优化途径及壳聚糖基涂膜技术类型,以期为草莓保鲜技术的发展提供参考。

热分解法合成制备Ti/RuO_(2)-HfO_(2)的工艺优化与电容性能研究

通过热分解法制备Ti/RuO_(2)-HfO_(2)二元复合氧化物涂层,利用XRD对涂层组织结构进行表征,通过循环伏安和充放电曲线分析对涂层的超电容性质进行研究。实验结果表明,Hf的加入有利于非晶态组织的形成;随着Hf含量的增加,电极比电容呈现先增大后减小的变化趋势,当Hf含量为50%时,电极比电容最大;Hf具有促进电化学稳定性的作用。

多种技术不同维度分析兰索拉唑肠溶片溶出度异常原因

利用激光红外成像技术和轨道阱高分辨质谱技术分析兰索拉唑肠溶制剂抽检中样品溶出度异常的原因并提出改进建议。按照法定标准对抽检制剂进行检验,一批样品的溶出度低于限度,其他项目均符合规定。考虑到本品对酸、碱不稳定,结合对生产企业飞行检查的结论,从不同维度设计实验考察该批次样品溶出度异常的原因,包括高温高湿的贮存环境对样品关键质量属性的影响、2 h抗酸实验对溶出度的影响、片芯成像及包衣层厚度测定、有关物质色谱条件优化、杂质谱分析等。研究发现,流通环节贮存不当和样品包衣工艺差是引起该批次样品溶出度低的原因。流通环节可能出现的高温高湿贮存环境引起样品中崩解剂功效下降,主药难以完全释放;包衣液不能均匀包裹于片芯,引起隔离层薄且厚度不一,继而影响其保护主药防止酸降解的效果。两者共同造成该批次样品溶出度偏低。兰索拉唑肠溶制剂总体质量较好,但部分企业处方和工艺需要优化;流通环节需要严格按照规定控制温湿度。

镍基热喷涂自润滑涂层研究新进展

近些年,镍基自润滑涂层作为减摩耐磨材料被广泛喷涂到机械运动副表面。从涂层的组分设计、制备工艺及涂层微结构控制3个方面,系统总结了热喷涂制备镍基自润滑涂层的最新研究进展并对未来的研究方向进行了讨论。首先从涂层基础相、润滑相和增强相3部分阐述了镍基自润滑涂层的构成要素,并重点分析了涂层组分设计的常用模式,以期为新型镍基自润滑涂层的组分设计提供参考;继而针对热喷涂技术的工艺特殊性,重点综述了热喷涂喂料复合粉末制备的研究最新进展;随后针对热喷涂制备涂层时导致的涂层缺陷问题,详细阐述了涂层微结构控制、涂层预处理和后处理等对自润滑涂层性能影响的最新探索进展;最后,总结了目前在镍基自润滑涂层研究中存在的问题,进一步指出优化工艺技术、采用数值模拟结合试验测试的方法,来深入研究涂层内部的润滑摩擦机理将是未来研究的重要方向。

制备工艺参数对氟碳树脂/铝粉涂层红外发射率的影响

为获得发射率较低的涂层,多集中在树脂与填料组分的筛选上,而涂层制备过程中的工艺参数对其发射率的影响研究较少,且未对各制备工艺间的相互影响作用进行分析。为此,选择铝粉作为金属填料,氟碳树脂作为黏合剂制备了低红外发射率涂层,先进行单因素试验,调控涂料的黏度(通过改变涂料中稀释剂添加量实现)、涂层的湿膜厚度以及固化温度,分析了3种工艺参数共同作用下对涂层中铝粉排布以及涂层红外发射率的影响。通过响应曲面法进一步分析了各工艺参数相互间的影响,并得到最优工艺参数组合,为涂层的实际制备过程做出指导。结果表明:3种工艺参数对涂层发射率的影响程度依次为涂料黏度>固化温度>湿膜厚度,在稀释剂添加量为78 g,膜层厚度为60μm,固化温度为73℃时,涂层在3~5μm波段的红外发射率为0.141,8~12μm波段的红外发射率为0.177。

耐酸分离膜制备的研究进展

膜分离技术是含酸废水处理领域的一项先进技术。在酸性腐蚀性较强的工作环境中,膜的耐酸性能要求也相对较高,耐酸性差是阻碍其广泛应用的难题。为解决这一类问题,制备耐酸性分离膜成为研究热点。

应用于IBC光伏组件的无主栅技术及封装材料研究

简述无主栅技术及其发展趋势,详细介绍了应用于叉指背接触(IBC)太阳电池的无主栅覆膜技术及无主栅焊接点胶技术的工艺流程,重点研究覆膜工艺应用于无主栅IBC光伏组件封装材料的匹配问题,提出了目前无主栅技术原材料的匹配方案及封装工艺的改进方法,并对分别采用常规工艺与改进工艺的无主栅IBC光伏组件在相同热循环(TC)老化试验后的电致发光(EL)图像进行了对比分析。研究结果表明:改进工艺优化了常规覆膜工艺的材料匹配,改善了应用双层复合膜工艺时铜丝与太阳电池副栅出现的接触不良的问题。同时,采用单层复合膜工艺避免了热压引起的IBC太阳电池弯曲和焊接不良的问题。研究结果可为无主栅IBC光伏组件封装技术的发展提供指导。