石墨烯/导电聚合物复合防腐蚀材料制备及应用研究进展

石墨烯/导电聚合物复合材料不仅具有石墨烯优异的屏蔽性能和导电聚合物良好的氧化还原特性,还能协同发挥二者的功能,在金属防腐蚀领域有着巨大的应用潜力。本文综述了石墨烯/导电聚合物复合防腐蚀材料的制备方法,包括电化学方法、化学氧化法、分散液混合法和化学气相沉积法（CVD）;并全面总结了石墨烯/导电聚合物复合材料在防腐蚀涂层中的应用及性能。制备的石墨烯/导电聚合物复合材料可以通过电化学方法、溶剂挥发法制成石墨烯/导电聚合物防腐蚀薄膜涂层,还可以混入成膜物树脂中制备树脂复合防护涂层。讨论了石墨烯/导电聚合物在制备过程、薄膜涂层和树脂复合涂层应用中的优势与不足,提出了构建结构可控、综合性能好的复合防腐涂层是石墨烯/导电聚合物复合防腐蚀材料的未来主要发展趋势。     

石墨烯制导电纤维

<正>近日消息,伊朗科研人员用石墨烯纳米薄片成功设计和制造出可调整导电率的导电纤维。获得的织物能用来制造电子纤维、智能纤维、抗电磁纤维、防水纤维及其他多种纤维。该研究课题科研人员表示,这项研究旨在探讨用石墨烯纳米薄片在织物表面创建导电涂层的可行性,并对影响织物导电性的各种参数进行研究。结果表明:还原剂对涂覆石墨烯织物的导电性影响相当大,     

低压高效石墨烯复合涂料的电热性能研究

分别在环氧、环氧改性有机硅、乙烯基树脂3种体系中,以石墨烯为导电填料,研究不同含量的石墨烯对涂料电热性能的影响。结果表明:石墨烯填充在乙烯基树脂中时,发热效率最高,石墨烯复合环氧树脂的涂层附着力最好;石墨烯与环氧改性有机硅复合综合性能最佳。当温度为25℃时,石墨烯含量为3%的环氧改性有机硅涂层在20 V低电压下通电2 min,涂层维持温度为61℃,涂层功率为12.5 W/dm~2,而且涂层物理性能最佳。石墨烯复合环氧改性有机硅树脂的电热涂料能满足安全、便捷、高效的要求。     

石墨烯/环氧复合导电涂层的防腐性能研究

以石墨烯粉体为填料,环氧E-44为基料研制了一种环氧复合防腐导电涂料,对比了不同石墨烯含量的复合涂料与纯环氧涂料、炭黑环氧涂料、环氧富锌涂料、玻璃鳞片涂料的导电和防腐等方面的性能。结果表明:石墨烯用量为0.5%时,涂层防腐性能优良,用量为1%时,涂层表面电阻率为106Ω,符合导静电要求。     

碳纳米管、石墨烯在导电涂料中的应用研究进展

综述了碳纳米管与石墨烯在导电涂料中的应用研究现状,分析了影响涂层导电性能的关键因素,包括填料的形貌、分散工艺以及成膜树脂对涂层渗流阈值和电导率的影响,并展望了碳纳米管与石墨烯导电涂料的发展方向。     

石墨烯复合浆料应用于ABS塑料电镀前表面处理

采用石墨烯等碳纳米材料与溶剂及多种助剂混合研磨,制备了稳定的石墨烯复合导电浆料.将导电浆料喷涂于丙烯腈-丁二烯-苯乙烯共聚物(ABS)表面获得ABS/石墨烯材料,赋予ABS塑料优良的导电性能,继而进行电镀处理.为了提高石墨烯涂层与ABS塑料表面的结合力,对ABS塑料进行了不同的表面处理,包括磨砂、有机溶剂微腐蚀和化学粗...     

静电纺丝法制备RGO/PU纳米复合纤维的研究

采用改进Hummer法制备了氧化石墨烯,并由氧化石墨烯制备了还原氧化石墨烯(RGO),将其添加到热塑性聚氨酯(PU)纺丝液中,用静电纺丝法制备了RGO/PU纳米复合纤维。讨论了纺丝电压对纤维的影响,考察了复合纤维膜的形貌、导电性能和力学性能。结果表明,纺丝电压为23~28 k V时有明显的泰勒锥;在PU中添加质量分数为0.50%的RGO可以明显提高复合纤维的导电性能;加入RGO后PU纤维拉伸强度和断裂伸长率提升明显。     

石墨烯修饰的碳纳米纤维膜的制备及性能研究

为拓展碳纳米纤维在环境保护与治理领域的应用,提高资源利用率,获得多功能型碳纳米纤维薄膜,利用静电纺丝法将氧化石墨烯(GO)与碳纳米纤维前驱体复合。以聚丙烯腈(PAN)基碳纳米纤维为载体,氧化石墨烯(GO)为改性添加剂,通过静电纺丝技术和预氧化、炭化处理制备石墨烯/碳纳米纤维复合纤维膜,研究不同GO含量和炭化温度对复合纤维膜性能的影响。结果表明：复合纤维膜的导电和吸油性能随炭化温度和GO添加量的增加而增强,炭化温度为1 100℃,GO添加量为4%时,复合纤维膜电导率达到1.63 S·cm^-1,是未添加的2.64倍;吸油系数为23.3,是未添加的1.36倍;水接触角均大于90°,表现为疏水性;添加少量GO后复合纤维膜导电、吸油和疏水性能均得到提升。     

一种高导电复合碳纤维及其制备方法

正一种高导电复合碳纤维及其制备方法,属于复合碳纤维及其制备方法。本发明由碳纤维及自下而上依次附着在其表面的金属涂层和石墨烯涂层组成;所述碳纤维为碳纤维丝、碳纤维束、碳纤维布、碳纤维纸或碳纤维织物;所述金属涂层为金属铜涂层、金属镍涂层或金属铱涂层;所述金属涂层     

纳米碳材料水性电热涂料的制备与性能研究

分别以多壁碳纳米管、石墨烯/多壁碳纳米管以及石墨烯作为导电填料制备水性羟基丙烯酸-氨基树脂基电热涂料,填料在固化后涂层中的质量分数均为50%。对3种涂层的导电性、电热性、机械性能进行研究,结果表明:石墨烯涂层在导电性、电热性方面优于多壁碳纳米管涂层,而后者在附着力和耐屈挠性方面优于前者;二者按照质量比1∶4复合时涂层可以同时获得良好的导电性、电热性和机械性能,整体效果最佳。从复合涂层表面和截面SEM照片可以看出,石墨烯和多壁碳纳米管在树脂内分散均匀,形成了很好的内部网络,推测该网络不仅有利于涂层实现良好的导电性,也可有利于其保持良好的机械性能。     

石墨烯导电油墨的研究进展

石墨烯因具备着超高的电荷迁移率,近年来在导电油墨领域备受关注,它赋予了石墨烯导电油墨优异的导电性能、耐腐蚀性以及耐候性等优点。本文通过查阅文献的方式,简要介绍了导电相石墨烯的制备方法及导电油墨的导电机理,着重介绍了石墨烯导电油墨的制备工艺,其中包含氧化还原法、机械剥离法、液相剥离法等制备工艺。综述了石墨烯导电油墨在能源、电子器件、功能传感器方面的应用。提出了石墨烯导电油墨未来研究的关键性问题,如石墨烯导电油墨分散稳定性问题、配方环保问题、氧化石墨烯（GO）导电油墨的还原技术问题等。最后提出,石墨烯导电油墨应朝着低成本、绿色化、产业化的方向发展。     

Revised Manuscript with Corrections: Polyurethane-Based Conductive Composites: From Synthesis to Applications

The purpose of this review article is to outline the extended applications of polyurethane (PU)-based nanocomposites incorporated with conductive polymeric particles as well as to condense an outline on the chemistry and fabrication of polyurethanes (PUs). Additionally, we discuss related research trends of PU-based conducting materials for EMI shielding, sensors, coating, films, and foams, in particular those from the past 10 years. PU is generally an electrical insulator and behaves as a dielectric material. The electrical conductivity of PU is imparted by the addition of metal nanoparticles, and increases with the enhancing aspect ratio and ordering in structure, as happens in the case of conducting polymer fibrils or reduced graphene oxide (rGO). Nanocomposites with good electrical conductivity exhibit noticeable changes based on the remarkable electric properties of nanomaterials such as graphene, RGO, and multi-walled carbon nanotubes (MWCNTs). Recently, conducting polymers, including PANI, PPY, PTh, and their derivatives, have been popularly engaged as incorporated fillers into PU substrates. This review also discusses additional challenges and future-oriented perspectives combined with here-and-now practicableness.     

掺杂石墨烯的ZnO复合材料研究进展

ZnO是一种低成本且应用广泛的材料,石墨烯具有较大的比表面积以及优良的吸附、光电等特性,易于与ZnO结合,可提高ZnO的性能。掺杂石墨烯的ZnO基材料在气体检测、抗菌表面涂层、发光二极管、透明导电电极和光催化等方面都有着应用性。本文概述了近几年来石墨烯掺杂ZnO材料作为导电薄膜、传感器、光催化剂等在光电子、生物医疗、环保等不同领域内的研究与发展,提出了目前该复合材料在制备工艺复杂与可控性差,实际应用与理论有较大差距等问题,并对未来的研究趋势进行了预测和展望。     

Electrical-Triggered Multicolor Reversible Color-Changing Ag Nanoparticles/Reduced Graphene Oxide/Polyurethane Conductive Fibers

Smart color-changing fibers attract much attention owing to their importance as a component of flexible electronics. A facile and scalable method of multicolor reversible electro–thermochromic Ag nanoparticles/reduced graphene oxide/polyurethane conductive fiber (ETC AgNPs/rGO/PU conductive fiber) is fabricated, which contains the polyurethane (PU) as the inner layer, reduced graphene oxide (rGO) with Ag nanoparticles (AgNPs) as the conductive layer, and thermochromic paste as the outermost layer. It possesses excellent electrothermal and color-changing properties and rapidly generates Joule heat at 0.5 V, which makes the fiber surface temperature reach 39.81 °C rapidly. The color switching rate is fast and changes from green to yellow within 2 s. During the process of 250 times on/off voltage, ETC AgNPs/rGO/PU conductive fibers still maintain excellent electrical and thermal properties and color change stability; even in the washing, strong acid, and strong alkali environment, they still have excellent durability. This human subjective adjustable electrical–thermal–color multi-level induced modulation makes it possible to be applied to smart wearable fields such as visual camouflage, personal thermal management, and active information transfer.     

Highly Stretchable and Sensitive SBS/Graphene Composite Fiber for Strain Sensors

Flexible strain sensors have attracted tremendous interests due to the emergence of intelligent wearable technology. Electrically conductive fibers are desirable candidates for flexible strain sensors, but up til now, there still exist enormous challenges to obtain conductive fibers exhibiting simultaneously high stretchability and high strain sensitivity. This paper introduces a poly (styrene‐butadiene‐styrene) (SBS)/graphene (Gr) composite fiber‐based flexible strain sensor fabricated by a facile and highly scalable wet spinning method. The results demonstrate that the graphene content has significant influence on the morphology, mechanical properties, and electromechanical properties of the composite fibers. The fibers with 5 wt% graphene have a wide response range of up to 100% strain, a high electrical sensitivity with the gauge factor of 10083.98 at 100% strain, and meanwhile, a high level of stability for 2100 stretching–releasing cycles under an applied strain of 20%. Furthermore, the SBS‐5%Gr composite fibers display excellent sensing performance in detecting human upper limb movements at different joints including hand joints, wrist joints, elbow joints, and shoulder joints.     

聚乳酸基纳米纤维素/石墨烯导电复合膜的制备与表征

利用真空抽滤方法,制备了纳米纤维素/石墨烯导电膜,将其嵌在聚乳酸表面得到聚乳酸基纳米纤维素/石墨烯导电复合膜。傅里叶红外（FT-IR）表征结果表明石墨烯与纳米纤维素之间存在一定的相互作用;当纳米纤维素与石墨烯质量比为1：2时,导电复合膜的电导率为12 S·cm^-1,抗张强度达到13.62 MPa,水接触角为80.6°。热重分析（TGA）表征结果表明导电复合膜有良好的热稳定性,300℃时不同质量比的导电复合膜的失重量低于10%,相比纳米纤维素,在相同温度下失重量减少了20%。以聚乳酸材料为基体的导电复合膜,其抗张强度比未被嵌聚乳酸基体的纳米纤维素/石墨烯导电膜提高15～23倍,将聚乳酸基纳米纤维素/石墨烯导电复合膜埋在土壤中5周后,质量损失了3.7%。聚乳酸材料优异的力学性能和可降解性,扩展了纳米纤维素/石墨烯导电复合膜的应用范围。制备的导电复合膜在柔性导电材料领域有潜在的应用前景。     

碳系导电油墨填料的研究进展

导电油墨起源于导电涂料,印刷电子行业的兴起产生了对导电油墨的研发需求。本文综述了碳系导电油墨填料的研究现状、导电机理、应用前景及其发展方向。首先概述了传统碳系导电油墨填料(石墨、炭黑、碳纤维及其混合物)以及新型碳系导电油墨填料(碳纳米管、石墨烯)的研究进展,重点分析了传统碳系填料的研究方向及手段,解释了新型碳系填料应用于导电油墨的优越性。然后从宏观和微观层面概述了当前主流的几种导电机理的基本原理和适用范围,并指出了目前对油墨导电性能的研究只能定性分析而不能定量描述的局限性。最后,重点介绍了两种新型碳系导电油墨填料的最新研究进展和应用方向,特别指出了当前对碳纳米管和石墨烯填料的研究亟需解决的问题,总结了二者今后的研究重点和研究趋势。     

SnO_2-Sb_2O_3-TiO_2导电粉末及其导电涂层的制备

以TiO2为基体,采用化学共沉淀技术制得复合导电粉末。利用正交试验得到优化的制备条件:复合反应体系组成为m(TiO2)∶m(SnCl4)∶m(SbCl3)=25∶15∶1,pH值为1.5,水解温度60℃,沉积SnCl4和SbCl3的水解产物于TiO2粒子表面,得到的包覆物在700℃下焙烧30 min,制备的复合导电粉末体的电阻率为77Ω.cm,粒径≤200 nm。将导电粉末与粘结树脂经球磨分散制得具有良好流动性的涂布液,在铝箔上能够制备得到电阻率低于108Ω.cm的导电涂层,满足制备有机光导体的要求,涂层表面平滑,无凹凸等缺陷。