臭氧微纳米气泡技术在水处理中的应用进展

臭氧是水处理领域常用的氧化剂之一,在水处理领域应用广泛。微纳米气泡技术由于其不同于普通气泡的特性,在水处理领域显现出良好的应用前景。文中阐述了微纳米气泡特性及优势,总结了臭氧在水处理应用中存在的主要问题,并综述了臭氧微纳米气泡技术在水处理中的应用现状和前景。     

微纳米气泡应用于水中污染物氧化降解的进展与挑战

微纳米气泡以其粒径小、存在时间长、传质效率高以及可产生羟基自由基等特性,已在水污染氧化降解领域受到广泛关注。介绍了微纳米气泡的产生机制与行为特性,系统概述了微纳米气泡氧化技术在地下水水体修复、废水处理及地表水净化方面的研究进展。最后,提出了微纳米气泡氧化技术应用于水污染消除的挑战,并展望了微纳米气泡氧化技术在水环境控制中的应用前景和后续研究方向。     

微纳气泡技术及在农业种植与养殖方面的应用

微纳米气泡具有很多独特的性质,如超长寿命、表面带电、比表面积大和传质效率高等.由于这些独特性质,微纳米气泡在诸多领域表现出巨大的应用前景,如水处理、农业、清洗、生物医药、土壤改良等.文中重点介绍了微纳米气泡在农业、水产养殖业中的应用.首先,介绍了微纳米气泡的定义和特性;其次,对微纳米气泡在农业养殖方面的应用进行了简要综...     

微纳米气泡特性及在环境污染控制中的应用

微纳米气泡具有与普通气泡不同的突出特性,近年来在环境污染控制领域中的应用日益受到关注。本文详细介绍了微纳米气泡在强化传质、界面电位以及可释放自由基等方面的技术特性,重点评述了微纳米气泡技术在悬浮物的吸附去除、难降解有机污染物的强化分解与生物净化功能的促进等方面的最新研究进展与应用现状,分析了微纳米气泡技术在环境污染治理中的技术优势与应用前景,并指出目前微纳米气泡技术的研究方向应侧重于如何实现有效脱氮、如何优化与其它强氧化条件的协同条件、如何开发出适用的环境污染修复新技术,以及如何开发出低成本、低能耗、性能优越、适于推广的实用型纳米气泡发生装置等。     

气浮工艺中微纳米气泡应用特性与检测技术研究

总结了不同文献中气泡尺寸的定义,根据其特性进行分类。概述了气浮工艺中微纳米气泡的应用特性,介绍了微气泡粒径分布和表面电荷对气浮工艺的影响。围绕微纳米气泡的尺寸分布、上升速度、气含率、Zeta电位等特性参数,总结了微纳米气泡的各种表征检测技术,同时概述了微纳米气泡在气浮技术中的应用现状及前景,并对其发展应用进行展望。     

微纳米气泡复合高级氧化技术降解污染物研究进展

介绍了难降解有机废水在水处理方面的特点,以及高级氧化技术降解有机污染物的机理,叙述了微纳米气泡的定义、特性和常见的产生方式,分析了各种常见的微纳米气泡复合高级氧化技术的应用,重点介绍了臭氧微纳米气泡技术和光催化微纳米气泡技术,总结了微纳米气泡复合高级氧化技术各种常见的实验装置及其应用.得出微纳米气泡作为一种新型的高级氧...     

微纳米气泡技术在渔业水产行业的研究进展及应用综述

微纳米气泡技术是当前国内外的前沿科技,也是研究的热点。该文详细介绍了微纳米气泡在悬浮物的吸附去除、有机物的强化分解及促进生物活性等方面的最新研究进展与应用现状。综述了微纳米气泡发生装置的各种原理和结构,并对其应用进展进行了分析和探讨,特别介绍了在渔业水产相关领域的研究应用情况。指出了微纳米气泡技术目前面临的主要问题及对渔业研究领域的启示,以期为微纳米气泡在水产养殖、捕捞、加工等领域的理论研究和技术应用提供参考。     

微/纳米气泡技术在金属表面脱脂处理中的应用研究

介绍了微/纳米气泡技术的发展历史和应用范围,并将微/纳米气泡应用于清洗领域中的脱脂试验中。试验结果表明,微/纳米气泡技术在脱脂试验中的使用,可以减少甚至不用脱脂剂,在清洗行业中是一种节能环保新技术。     

微纳米曝气技术在环保领域的研究进展及应用

微纳米曝气技术是一项新兴且应用前景广泛的环境治理技术。与传统曝气技术相比,微纳米曝气技术产生的气泡具有停留时间长、传质效率高、界面电位高、比表面积大、能自发产生自由基等显著优势,已逐步成为环保领域备受关注的热点。文章介绍了微纳米气泡发生的常规方法,并系统综述了该技术在污水净化、土壤修复、废气处理、水产养殖、杀菌消毒、卫生清洁和农业生产等方面的研究现状和应用。该技术的应用推广,对推动环保行业技术发展和缓解环境污染具有重大意义。     

纳米气泡制备和检测方法研究进展

纳米气泡凭借独特的物理化学性质和生理活性引起了国内外的广泛关注,其在废水处理、土壤和地下水修复、矿物浮选、动植物生长以及生物医学等领域具有良好的发展空间和应用前景.近年来,随着各类技术的不断进步,人们对纳米气泡的研究工作取得了一系列成果,尤其是在纳米气泡的形成机制和测定方法方面.文中概述了目前国内外纳米气泡常用的制备方...     

丙烯酸酯微乳液研究进展

丙烯酸酯微乳液是一种纳米相分散体系,其具有优良的渗透性、亲合性、成膜性,这使其具有极大的应用潜力。本文主要对近年来合成丙烯酸酯微乳液所采用的新方法、新技术、新单体进行了综述,以及丙烯酸酯微乳液在油墨、纸张、纺织品、皮革、建筑等方面的应用进行了简单介绍,并指出了合成高固含量、低乳化剂的用量是其发展方向。     

Template-Based Synthesis of Nano/Micro Structures on a Semiconducting Substrate

In recent years, nano/micro wires have attracted considerable attention because of their extraordinary physical properties and enormous potential for applications in numerous fields of research and technology. Among the methods widely used to create nanowires, electrochemical deposition in the pores of ion-track polymer membranes have turned out to be very suitable. This method may also be used to synthesize nano/micro structures on the substrate itself to prevent post-synthesis manipulations. For this, the polycarbonate layer is spin coated on the semiconducting substrate and then irradiated with heavy ions. Chemical etching of these latent tracks leads to the formation of nano-/micro-size pores. After depositing metal in these pores, the polycarbonate templates are removed by dissolving them in dichloromethane, leading to the formation of nanowires standing on the substrate itself. Using this technique, we have studied VI characteristics of metallic nano/micro wires grown on the silicon substrate. These nano/micro structures show Schottky behavior when forward biased and ohmic behavior when reversed biased.     

基于微纳层叠技术的聚合物纳米纤维制备及应用研究进展

简述了微纳层叠共挤技术的发展;总结了近些年来基于微纳层叠技术制备纳米纤维的研究进展,包括聚合物参数,制备方法和成纤机理;对目前几种典型微纳层叠成纤方法进行了分类和对比,并对纤维的性能进行了阐述;对微纳层叠纳米纤维的应用进行了介绍。最后针对微纳层叠技术用于纳米纤维制备的发展方向和应对的挑战进行了浅析。     

微纳复合表面HFE-7100/水的BRT现象及沸腾传热特性

HFE-7100/水作为非共沸不互溶工质可以拓宽核状沸腾传热的有效温区,目前关于其在微纳复合表面的沸腾传热特性和气泡运动机理尚不明晰。利用气泡模板电沉积法在铜基表面上制备了具有微纳孔洞的复合结构,测试了HFE-7100/水的沸腾传热特性,并通过可视化探究了沸腾工质转换（BRT）过程中两相工质在表面的润湿状态和气泡运动现象。结果表明,微纳复合表面上HFE-7100/水的BRT过程中,气泡先后经历小气泡聚并、气膜膨胀、轻工质接触壁面核化三个过程。在BRT过程中,HFE-7100与水对热壁面的润湿性存在竞争关系,随着过热度增加,薄的HFE-7100液层难以维持稳定的重工质沸腾,上层水工质可以穿过HFE-7100层对热壁面实现完全润湿,完成BRT过程。与单一工质相比,常压下HFE-7100/水混合工质体系可以在343~423 K下实现高效的核状沸腾传热。该研究揭示了HFE-7100/水在微纳复合表面的沸腾传热特性,为沸腾强化表面设计提供了思路。     

纳米氧化铜粉体的制备及应用研究进展

纳米氧化铜不同于常规氧化铜,由于其晶粒尺寸小,比表面积大,使其具有独特的电、磁、光、化学等特性。近些年,其应用范围越来越广阔。本文综述了纳米氧化铜粉体制备的具体方法,详细介绍了液相法、固相法等制备技术的国内外研究进展;同时分析介绍了纳米氧化铜在常温脱硫、催化反应和抗杀菌等方面的应用前景,认为纳米氧化铜在污染物治理方面的应用需深入研究,以拓宽其在环境工程中的应用范围;最后指出制备过程中的环境污染、工艺耗能和反应时间等问题应得到重视,而纳米氧化铜的制备工艺应向着节能、高效、绿色工业的方向发展。     

Effects of micro and nano β‐TCP fillers in freeze‐gelled chitosan scaffolds for bone tissue engineering

Tissue engineering holds an exciting promise in providing a long‐term cure to bone‐related defects and diseases. However, one of the most important prerequisites for bone tissue engineering is an ideal platform that can aid tissue genesis by having biomimetic, mechanostable, and cytocompatible characteristics. Chitosan (CS) was chosen as the base polymer to incorporate filler, namely beta‐tri calcium phosphate (β‐TCP). This research deals with a comparative study on the properties of CS scaffolds prepared using micro‐ and nano‐sized β‐TCP as filler by freeze gelation method. The scaffolds were characterized for their morphology, porosity, swelling, structural, chemical, biodegradation, and bioresorption properties. Rheological behavior of polymer and polymer‐ceramic composite suspensions were analyzed and all the suspensions with varying ratios of β‐TCP showed non‐Newtonian behavior with shear thinning property. Pore size, porosity of micro‐ and nano‐sized composite scaffolds are measured as 48–158 μm and 77% and 43–155 μm and 81%, respectively. The scaffolds containing nano β‐TCP possess higher compressive strength (～2.67 MPa) and slower degradation rate as compared to composites prepared with micro‐sized β‐TCP (～1.52 MPa). Bioresorbability, in vitro cell viability by 3‐(4,5‐dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium bromide (MTT) assay, proliferation by Alamar blue assay, cell interaction by scanning electron microscope, and florescence microscopy further validates the potentiality of freeze‐gelled CS/β‐TCP composite scaffolds for bone tissue engineering applications. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 41025.     

Research on the Feasibility of Spraying Micro/Nano Bubble Ozonated Water for Airborne Disease Prevention

This research combined micro/nano bubble techniques with ozone disinfection to determine feasibility of applying micro/nano bubble ozonated water in preventing tomato airborne disease. Results indicated that dissolving ozone in micro/nano bubbles is more efficient than using a mixing pump. In our in vitro studies, when dissolved ozone concentration was 1.6 mg/L, a 5.2 to 3.3 log reduction in Alternaria solani Sorauer conidia was observed; with concentration of 1.8 mg/L, there was a 5.0 to 3.7 log reduction in Cladosporium fulvum conidia. Furthermore, spraying ozonated water in a certain concentration range (0.6–1.8 mg/L) had no significant negative effects on tomato growth.     

Effect of Silicone Nano,Nano/Micro and Nano/Macro‐Emulsion Softeners on Color Yield and Physical Characteristics of Dyed Cotton Fabric

The study of silicone nano‐emulsions and softeners to alter physical properties of undyed cotton fabric has recently gained a substantial interest. However, systematic investigation of silicon nano‐emulsion softeners on dyed cotton fabric has not so far been conducted. This paper deals with the application of silicone nano‐, micro‐, and macro‐emulsion softeners, and combinations of nano/micro and nano/macro, on dyed cotton fabric. We report the effect of silicon nano/micro‐ and nano/macro‐emulsion softeners on color yield and physical characteristics of dyed cotton fabric. All bleached fabrics were dyed with CI Reactive Black 5 and then treated with known concentrations of silicone softeners by the pad‐dry method. The silicone nano‐emulsion was combined with micro‐ and macro‐emulsion softeners using blending ratios of nano/micro (1:1) and nano/macro (1:1). Treated fabrics were compared in terms of physical properties such as fabric handling, wrinkle recovery angle, bending length, abrasion resistance and tensile strength. The color changes were evaluated by color yield (K/S) values and total color difference (ΔE_cmc). The results revealed that the silicon nano‐emulsion had better physical properties than micro‐, macro‐ and combination nano/micro‐ and nano/macro‐emulsion softeners. Among all treated samples, nano‐emulsion softeners showed better ΔE_cmc values. Scanning electron microscopy analysis suggests that the fiber morphology of treated fabrics was very smooth and uniform.     

复合纳米二氧化硅的制备进展

全面地综述了复合纳米二氧化硅的制备方法,重点介绍了溶胶-凝胶法、水解-沉淀法、表面接枝法、乳液聚合法、微乳液聚合法、原位聚合法。对制备方法进行了概括和评价,并简述了复合纳米二氧化硅在应用领域的进展。