氧化物纤维/氧化物陶瓷基复合材料研究概述

氧化物纤维，氧化物陶瓷基复合材料可以在高温氧化环境下长时间工作，是最有发展潜力的高温结构陶瓷材料之一。决定氧化物纤维，氧化物陶瓷基复合材料性能最主要的2个因素是氧化物纤维的性能和界面材料的组成与结构。笔者介绍了氧化物纤维和界面材料的发展，以及界面材料涂覆方法，并探讨了氧化物纤维，氧化物陶瓷基复合材料的发展趋势。     

非金属矿物强韧氧化物陶瓷基复合材料研究进展

氧化物陶瓷基复合材料具有高硬度、高强度、高耐磨损性、低线膨胀系数、抗氧化、耐高温、耐化学腐蚀和抗高温蠕变等优点,在制造业、航空航天、齿科修复等领域得到广泛应用。非金属矿物与氧化物陶瓷基复合材料的有效复合,不仅能够发挥我国典型非金属矿物的资源禀赋特征和结构特点,也能够降低氧化物陶瓷基复合材料强韧化成本、提高制备过程的可控性。本文重点介绍了白云石、电气石、海泡石等三种非金属矿物在强韧氧化物陶瓷基(Al₂O₃、ZrO₂和“磷酸钙-高岭土-石英”)复合材料方面的研究进展,归纳了非金属矿物的组分、结构等对氧化物陶瓷基复合材料强韧化的作用成效,并对其发展趋势进行了展望。     

Na2O对氧化物/MoSi2基复合材料的高温蠕变特性的影响

研究了脱Na工艺前后氧化物/MoSi2基发热元件材料对石英玻璃管失透性的影响及其高温蠕变特性.结果表明通过脱Na处理氧化物/MoSi2基复合材料对石英玻璃管的失透现象基本消失, 而且高温蠕变特性有了明显改善, 材料蠕变应力指数和活化能分别从原来的0.83, 281 kJ*mol-1变化到0.71, 292 kJ*mol-1.并且氧化物/MoSi2基复合材料的这种蠕变行为可以从晶界滑移理论得到很好的解释.     

铈基纳米复合氧化物的研究及其应用进展

综述了以氧化铈为基的纳米复合氧化物的国内外研究进展,阐述了纳米TiO_2-CeO_2、CeO_2-ZnO、ZrO_2/CeO_2及CeO_2与其他氧化物的复合(如Al2O3、CaO、CuO等)材料的制备与性能,最后对铈基纳米复合材料的研究进行了展望。     

铈基纳米复合氧化物的研究及其应用进展

综述了以氧化铈为基的纳米复合氧化物的国内外研究进展,阐述了纳米TiO_2-CeO_2、CeO_2-ZnO、ZrO_2/CeO_2及CeO_2与其他氧化物的复合(如Al2O3、CaO、CuO等)材料的制备与性能,最后对铈基纳米复合材料的研究进行了展望。     

连续纤维增强碳化硅复合材料界面区研究进展

界面区对于连续纤维增强陶瓷基复合材料的性能水平有着决定性的影响,其中以纤维/基体界面涂层最为关键.本文介绍了常见的四种界面区类型,在探讨界面区作用机制与要求的基础上,综述了C/SiC和SiC/SiC复合材料中C、BN、碳化物、氧化物等界面涂层材料及其制备技术的研究现状,指出了存在的问题与发展趋势.     

氧化物与非氧化物复合耐火材料研究现状

论述了氧化物与非氧化物复合材料体系的研究成果及新方法。研究表明，锆刚玉莫来石与非氧化物复合材料是有发展前途的高性能耐火材料。化学热力学、统计模式识别和分形理论是用于复合耐火材料研究的新方法。     

氧化铝纤维增韧氧化铝陶瓷机理研究

纤维陶瓷基复合材料由于具有耐高温,抗氧化,强度大,化学稳定性好,弹性模量高,刚性好等优良性能,越来越成为人们研究的重点。目前,国内普遍研究的是Si3N4、SiC、C等非氧化物纤维增强的陶瓷基复合材料,这些材料虽然性能优异,但非氧化物纤维在高温下极易氧化。因此,本试验选用抗氧     

锰氧化物修饰铁酸钴纳米棒对亚甲基蓝的吸附性能

利用铁酸钴纳米纤维优良的磁性和锰氧化物优异的吸附性能,以介孔铁酸钴纤维为载体,在其表面负载纳米二氧化锰,制备了锰氧化物修饰铁酸钴纳米棒复合材料。通过X射线衍射、扫描电子显微镜、X射线能谱、Fourier红外光谱等测试手段对样品形貌和物相组成进行了表征。将所得样品用于去除模拟污染水体中的染料,考察了不同制备条件下所得产物对亚甲基蓝的吸附性能,探讨了吸附过程的热力学和动力学过程。结果表明:铁酸钴纳米纤维上负载锰氧化物复合材料对亚甲基蓝有优异的吸附能力,最大吸附容量可达99.60 mg/g。常温下,其吸附等温线可用Langmuir吸附模型描述,吸附动力学符合Lagergren二级速率方程,吸附为放热自发过程。     

氧化物-非氧化物复合耐火材料高温性能的研究

对氧化物-非氧化物复合材料(如ZCM-SiC,ZCM-BN,O’-Sialon-ZrO2,β-Sialon-Al2O3等)的高温性能(强度、抗热震性、抗氧化性等)进行了研究。结果表明(1)所研究的氧化物-非氧化物复合材料的高温强度明显优于碳结合材料的高温强度。(2)在氧化物基质中引入非氧化物,可提高材料的抗热震性。(3)在非氧化物基质中引入氧化物可明显改善材料的抗氧化性。     

Constructing Morphologically Tunable Copper Oxide-Based Nanomaterials on Cu Wire with/without the Deposition of Manganese Oxide as Bifunctional Materials for Glucose Sensing and Supercapacitors

Morphologically tunable copper oxide-based nanomaterials on Cu wire have been synthesized through a one-step alkali-assisted surface oxidation process for non-enzymatic glucose sensing. Subsequently, copper oxide-based nanomaterials on Cu wire as a supporting matrix to deposit manganese oxide for the construction of heterostructured Mn-Cu bimetallic oxide architectures through spontaneous redox reaction in the KMnO₄ solution for supercapacitors. Field emission scanning electron microscopy (FESEM), field emission transmission electron microscopy (FETEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) confirmed that morphological and phase transformation from Cu(OH)₂ to CuO occurred in copper oxide-based nanomaterials on Cu wire with different degrees of growth reaction. In non-enzymatic glucose sensing, morphologically tunable copper oxide-based nanomaterials owned the high tunability of electrocatalytically active sites and intrinsic catalytic activity to meet efficient glucose electrooxidation for obtaining promoted non-enzymatic glucose sensing performances (sensitivity of 2331 μA mM⁻¹ cm⁻² and the limit of detection of 0.02 mM). In the supercapacitor, heterostructured Mn–Cu bimetallic oxide-based nanomaterials delivered abundant redox-active sites and continuous conductive network to optimize the synergistic effect of Mn and Cu redox species for boosting the pseudo-capacitance performance (areal capacitance value of 79.4 mF cm⁻² at 0.2 mA cm⁻² current density and capacitance retention of 74.9% after 1000 cycles). It concluded that morphologically tunable copper oxide-based nanomaterials on Cu wire with/without deposition of manganese oxide could be good candidates for the future design of synergistic multifunctional materials in electrochemical techniques.     

Current Research Status and Application of Polymer/Carbon Nanofiller Buckypaper: A Review

With recent development in the field of polymer-based composite paper, buckypaper technology has gained considerable research attention. Conventionally, polymeric composites have been fabricated using carbon nanofiller (carbon nanotube, graphene, and graphene oxide) reinforcement in polymer matrix. In buckypaper technology, freestanding thin porous nanofiller network is formed using various papermaking techniques, which may further improve physical properties of polymer/carbon nanofiller buckypaper composite. This review also aims to report technical aspects of polymer/carbon nanotube, polymer/graphene, and polymer/graphene oxide-based composite paper. Special emphasis is given to the application of polymer/carbon nanofiller buckypaper in fuel cell, batteries, sensor, artificial muscles, fire retardant materials, and liquid crystal cells.     

Exploitation of Nanobifiller in Polymer/Graphene Oxide–Carbon Nanotube,Polymer/Graphene Oxide–Nanodiamond,and Polymer/Graphene Oxide–Montmorillonite Composite: A Review

In this article, a comprehensive review is presented regarding structure, synthesis, and properties of nanofillers such as graphene oxide, nanobifiller of graphene oxide, and their polymeric nanocomposite. The information about hybrid properties and synthesis of graphene oxide–carbon nanotube, graphene oxide–montmorillonite, and graphene oxide–nanodiamond is presented. Use of nanobifiller in polymer/graphene oxide–carbon nanotube, polymer/graphene oxide–montmorillonite, and polymer/graphene oxide–nanodiamond composites was summarized. Area of polymer and graphene oxide-based nanobifiller composites is less studied in literature. Therefore, nanobifiller technology limitations and research challenges must be focused. Polymer/graphene oxide nanobifiller composites have a wide range of unexplored potential in technological areas such as automobile, aerospace, energy, and medical industries.     

Zinc Oxide/Graphene Oxide as a Robust Active Catalyst for Direct Oxidative Synthesis of Nitriles from Alcohols in Water

Catalysis Letters - In this work, without using any linker or chemical modification of graphene oxide, a zinc oxide immobilized graphene oxide-based catalyst was used for the direct aerobic...     

聚合物/氧化石墨纳米复合材料的研究进展

氧化石墨(GO)因其独特的结构及特性引起了人们的关注,它与聚合物通过插层复合技术形成的聚合物/氧化石墨纳米复合材料是一种很有发展前景的新型材料.本文对氧化石墨的结构、聚合物/氧化石墨纳米复合材料的制备及其性能进行了综述,并对其未来发展方向进行了展望.     

氧化石墨烯与纳米氧化铁复合物的制备及性能研究

文章用Hummers法制备氧化石墨,以绿矾为原料、采用氯酸钠氧化制备纳米氧化铁,采用超声共混,搅拌,烘干制的复合物,通过FT-IR/TG/TEM等进行表征,结果表明,氧化石墨完全剥落,氧化铁在内分散很好,两者界面相容很好。复合材料吸附性好,有很好吸附砷的功能。     

Synthesis of Graphene Oxide/Iron Oxide/Au Nanocomposite for Quercetin Delivery

This study focused on developing a superparamagnetic graphene oxide-based nanocomposite consisting of iron oxide (IO) and gold nanoparticles for quercetin delivery. For this purpose, the structure and morphology of the designed nanocomposite (GO/IO/Au) were investigated by several characterization methods such as fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) analysis, vibrating-sample magnetometer (VSM) analysis, field emission scanning electron microscopy (FESEM) and Transmission electron microscopy (TEM). Then, the biocompatibility of the synthesized nanocomposite was studied by Brine shrimp Artemia lethality assay, red blood cell hemolysis assay, and MTT (3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide) assay. Moreover, the GO/IO/Au nanocomposite efficiency as an anticancer drug delivery system was evaluated in vitro conditions. The results showed that the designed nanocomposite is highly biocompatible and possesses a favorable magnetization (M_s?=?29.2 emu.g^?1) making it a good candidate for biomedical applications. Also, it was confirmed that GO/IO/Au nanocomposite is a potent drug carrier that can effectively deliver quercetin to cancer cells.

     

Progression from Graphene and Graphene Oxide to High Performance Polymer-Based Nanocomposite: A Review

In this article, various types of carbon nanofiller and modification of graphene oxide and graphene for the preparation of polymer-based nanocomposites are reviewed. Recently, polymer/graphene and graphene oxide-based materials have attracted tremendous interest due to high performance even at low filler content. The property enhancement is due to the high aspect ratio, high surface area and excellent electrical, thermal and mechanical properties of nanofiller. Different techniques have been employed to fabricate polymer/graphene and graphene oxide nanocomposite with uniform dispersion due to fine matrix/nanofiller interaction. Here we discuss the structure, properties and preparation of these nanocomposites.     

Progress in Processing and Performance of Porous-Matrix Oxide/Oxide Composites

All-oxide continuous fiber-reinforced ceramic matrix composites are enabling materials for high-temperature structural applications in oxidizing environments. However, their industrial use requires further improvements in material performance as well as a significant reduction of the processing costs. This article gives some insight into a novel colloidal processing route. A porous mullite matrix was designed to obtain damage-tolerant behavior as well as high-temperature long-term stability. Laminated composites were formed with conventional techniques similar to the manufacture of polymer matrix composites. This simple and low-cost process leads to homogeneous microstructures with improved material properties compared with the state of the art in continuous fiber-reinforced oxide/oxide composites. The developed composites in the present study exhibit favorable mechanical properties both at room temperature and after thermal aging for 1000 h at temperatures up to 1300°C.