低温等离子体-光催化净化空气污染物技术研究进展

低温等离子体一光催化技术是一项新兴的技术,它结合了低温等离子体技术和光催化技术的优点,在环境领域有着广阔的应用前景。近年来的研究初步表明,它在治理空气污染物的方面具有较好的性能。介绍了低温等离子体一光催化净化空气污染物技术的基本原理,并从去除挥发性有机物、氮氧化物、杀菌除臭等方面介绍了国内外对该技术的研究,指出了今后研究发展方向。     

聚酯纤维的低温等离子体表面改性

探讨了聚酯纤维氩气低温等离子体处理的工作条件及处理后纤维的性能和表面形态。结果表明 ,在本实验条件下 ,聚酯纤维经氩气低温等离子体处理后 ,表面形成刻蚀 ,吸湿性明显提高 ,其力学性能和热性能变化不大     

低温等离子体技术在非织造材料表面改性中的应用

介绍了低温等离子体技术的基本原理,及其应用于非织造材料表面改性的方法;详述了低温等离子体技术在非织造材料表面改性中的应用现状及发展趋势。低温等离子体技术应用于非织造材料表面改性主要分为等离子体表面处理改性、等离子体沉积聚合、等离子体接枝聚合3种方法;采用低温等离子体技术可以显著改善非织造材料表面的润湿性、染色性、粘结性和血液过滤性能等;低温等离子体技术在非织造材料领域具有广阔的发展前景,今后应加大对低温等离子体改性机理及其处理效果的时效性等方面的研究,促进其产业化发展。     

旋流管式厨房油烟净化技术的研究

分析了饮食业油烟污染的危害,介绍了油烟净化设备和油烟污染的现状,提出了一种新型的油烟净化方法和设备.     

低温等离子体净化船舶舱室空气进展

介绍了低温等离子体系统净化船舶舱室空气的基本原理和典型装置,及国内外在此方面的研究进展。展望了低温等离子体技术净化船舶舱室空气的研究前景并指出了存在的问题。     

低温等离子体净化苯甲酸废水研究

采用低温等离子体技术处理模拟苯甲酸废水,研究了苯甲酸溶液浓度、pH值、放电电压、放电时间等对苯甲酸废水COD的影响。结果表明,影响苯甲酸溶液COD降解率因素主次顺序为:苯甲酸溶液pH值>苯甲酸溶液浓度>放电时间>放电电压。在苯甲酸溶液浓度1. 5 g/L,溶液pH为6,放电电压410 k V,放电时间2. 0 h的条件下,苯甲酸废水的COD降解率最好,可达65. 59%。     

低温等离子体净化苯甲酸废水研究

采用低温等离子体技术处理模拟苯甲酸废水,研究了苯甲酸溶液浓度、pH值、放电电压、放电时间等对苯甲酸废水COD的影响。结果表明,影响苯甲酸溶液COD降解率因素主次顺序为:苯甲酸溶液pH值>苯甲酸溶液浓度>放电时间>放电电压。在苯甲酸溶液浓度1. 5 g/L,溶液pH为6,放电电压410 k V,放电时间2. 0 h的条件下,苯甲酸废水的COD降解率最好,可达65. 59%。     

低温等离子体在合成纤维表面改性中的应用

本文简述了低温等离子体的产生、改性原理、对高分子材料的改性特点及其在合成纤维表面改性中的应用和实例。     

聚四氟乙烯低温等离子体表面改性研究进展

介绍了低温等离子体表面改性的作用机理、分类及特点,综述了国内外低温等离子法对聚四氟乙烯（PTFE）表面改性的研究进展,并对发展前景进行了展望。     

低温等离子体灭菌及生物医药技术研究进展

低温等离子体的生物学效应包括对微生物的致死作用和对动物细胞的刺激作用,分别造就了一批灭菌技术和临床医药技术。本文介绍了等离子体灭菌技术在医疗器械、水和空气净化、食品和包装材料处理等方面的应用。其中已商业化的医疗器械灭菌器主要分低气压和常压两种,低气压等离子体灭菌器的灭菌体积较大,常压等离子体灭菌器的优点则是结构简单和便于操作。等离子体灭菌技术用于水、空气、食品等领域由于能耗、效率、化学残留等问题尚未商业化。在医药技术方面,近十年来开发的等离子体技术和装备成功运用于龋齿、皮肤、伤口、癌症等的处理,部分已进入临床应用。将来的研究重点在于明确等离子体与细胞之间的相互作用机理,并开发出更高效、实用的用于各相关行业的等离子体技术和装备。     

Thick thermal barrier coatings with different segmentation crack densities: Microstructure analysis and thermal oxidation behavior

Thick thermal barrier coatings (TTBCs) have been developed to increase the lifetime of hot section parts in gas turbines by increasing the thermal insulating function. The premeditated forming of segmentation cracks was found to be a valuable way for such an aim without adding a new layer. The TTBC introduced in the current study are coatings with nominal thickness ranging from 1 to 1.1 consisting of MCrAlY bond coat and 8YSZ top coat deposited by air plasma spray technique (APS). TTBCs with segmented crack densities of 0.65 mm^?1 (type-A) and 1 mm^?1 (type-B) were deposited on a superalloy substrate by adjusting the coating conditions. It was found that the substrate temperature has an influential role in creating the segmentation crack density. The crack density was found to increase with substrate temperature and liquid splat temperature. The two types of coatings (type-A and B) with different densities of segmentation crack were heat-treated at 1000 °C (up to 100 h) and 1100 °C (up to 500 h). The variation of hardness measured by indentation testing indicates a similar trend in both types of coatings after heat treatments at 1000 °C and 1100 °C. Weibull analysis of results demonstrates that higher preheating coating during the deposition results in a denser YSZ coating. The growth rate of TGO for TTBCs was evaluated for cyclic and isothermal oxidation routes at 1000 °C and 1100 °C. The TGO shows the parabolic trend for both two types of coatings. The Kps value for two oxidation types is between 5.84 × 10^?17 m²/s and 6.81 × 10^?17 m²/s. Besides, the type B coating endures a lifetime of more than 40 cycles at thermal cycling at 1000 °C.     

非共价功能化石墨烯改性PLA薄膜的制备

以双十二烷基二甲基溴化胺非共价修饰还原石墨烯(DDAB–RGO)为纳米填料,通过溶液铸膜法制备了聚乳酸/功能化石墨烯(PLA/DDAB–RGO)纳米薄膜。用傅立叶变换红外光谱和扫描电子显微镜对DDAB–RGO及纳米复合薄膜的化学结构及形貌进行了表征,并对纳米薄膜的结晶性能、力学性能、热稳定性等进行了测试分析。结果表明,DDAB–RGO与PLA具有良好的相容性,均匀分散于PLA基体中,在较低DDAB–RGO含量时对PLA膜起到了纳米增强的作用,当其含量为0.2%时,PLA/DDAB–RGO纳米薄膜的拉伸强度、拉伸弹性模量比纯PLA膜分别提高了21%和36%。同时DDAB–RGO的加入还改善了PLA的结晶性、热稳定性。     

Atmospheric plasma sprayed 7%-YSZ thick thermal barrier coatings with controlled segmentation crack densities and its thermal cycling behavior

Yttria-stabilized zirconia (YSZ)-coatings are deposited on Ni-based superalloy IN738 by atmospheric plasma spraying (APS). For the first time, controlled segmentation crack densities are manually developed in the coatings, even after the APS deposition. This method allows to user to control segmentation densities as well as cracks depth, which could be designed as per coating thickness and required application. Thermal cycling test shows promising strain tolerance behavior for the segmented coatings, whereas coating without segmentation could not sustain even for its first thermal cycle period. Further, microstructural studies reveal that a very thin layer of TGO was formed and obvious no coating failure or spallation was observed after thermal cycling test at 1150 °C for 500 cycles.