炭黑填充导电涂层耐候性研究

采用环氧树脂E-51为基体材料制备导电涂层材料,通过改变炭黑添加量、固化时间、固化温度、固化剂当量、稀释剂含量,考查其电阻率的变化来表征其耐低温、耐湿热以及耐老化性能。研究结果表明,当炭黑含量21%,稀释剂含量20%,固化剂当量0.8,固化温度80℃,固化时间4 h时,导电涂层材料具有最佳的耐老化性能。这种方法制备的导电涂层材料的耐老化与耐低温性能较好,电阻率稳定,并且通过添加柔性稀释剂可大幅提高材料的耐湿热性能。     

碳纳米管/炭黑环氧树脂的制备与性能研究

使用CNTs和炭黑一同复合来改性善环氧树脂的性能,主要考察了固化剂用量、促进剂用量、碳纳米管/炭黑用量、超声时间和稀释剂用量对复合材料的导电性能和力学性能的影响。结果表明,加入环氧树脂2%~3%的碳纳米管/炭黑后能显著提升复合材料的导电性能和力学性能,通过多组分复合改性可以得到低成本高性能的环氧树脂材料。     

玉米秸秆纤维/环氧树脂复合材料的制备与性能研究

以缩二脲改性的环氧树脂为粘胶剂,玉米秸秆纤维为增强材料,多异氰酸酯为相容剂,丁基缩水甘油醚为稀释剂制备玉米秸秆纤维/环氧树脂复合材料。利用FTIR对其进行结构分析,万能试验机进行力学分析,并研究了玉米秸秆纤维用量对复合材料力学性能和耐水性的影响。结果表明,当粘胶剂质量分数为15%,相容剂与秸秆纤维质量比为1∶3时所制备的复合材料具有良好的力学性能,厚度溶胀率和吸水率较低,是一种性能较为优良的新型环保型复合材料。     

低阻复合型导电聚丙烯的制备研究

使用聚丙烯(PP)、热塑性弹性体(POE)、炭黑、碳纤维熔融共混制备了导电复合材料。研究了导电填料含量对材料电阻率的影响和POE含量对材料力学性能的影响。结果表明:炭黑与碳纤维的复合应用能够获得低阻导电复合材料,POE可以有效地提高材料的拉伸强度和断裂伸长率。     

新型碳纤维复合导电材料的制备以及性能研究

研究了新型碳纤维复合导电材料的制备方法及其导电性能,提出了基于电气相沉积(CVD)法和热解法的新型碳纤维复合导电材料制备方法。采用电化学调节方法和稳态控制方法,进行碳纤维复合导电材料的光生电荷的分离;采用热解法对碳纤维复合导电材料进行热解分离及衍射谱分解;将羧甲基纤维素盐加入到碳纤维复合导电材料的溶解质中,确保制备过程中碳纤维复合导电材料的导电性。对性能进行研究时,通过分析碳纤维复合导电材料的电磁特征,对导电材料的电阻率、材料制备成本、功率损耗及效率进行分析。研究得知,制备的新型碳纤维复合导电材料的导电性能较好,输出稳态性较强。     

不饱和聚酯树脂基复合材料的导电性能

以石墨、碳纤维、镍粉和不饱和聚酯树脂为原料通过模压成形固化制备导电复合材料,研究不同比例导电填料及用量、加工工艺对复合材料性能的影响.结果表明:导电填料比例和含量对复合材料的电导率与弯曲性能影响显著,一定含量下的镍粉和碳纤维,可以明显改善体系的强度,同时有助于降低材料的体积电阻率.加入适量丙酮溶剂作为稀释剂,提高了导电填料的分散和浸润,材料的导电性和弯曲性能明显提高.     

氟橡胶复合导电材料性能

研究以氟橡胶为基体树脂,炭黑、石墨和碳纤维为导电填料的导电复合高分子材料中,炭黑、石墨、碳纤维及三者之间的配比和混炼时间对复合材料导电性能和机械性能的影响,制备出体积电阻率小于1Ω·cm的氟橡胶复合导电材料。     

新型炭黑填充抗静电和导电聚丙烯复合材料

以炭黑为导电填料,在聚丙烯中加入适量的环氧树脂和玻璃纤维,制备了新型的抗静电和导电聚丙烯复合材料。测定了不同复合体系的渗滤阈值,用扫描电镜(SEM)对相形貌进行了观察,并研究了环氧树脂和玻璃纤维用量对体积电阻率的影响。SEM照片表明在新型复合材料中,炭黑优先分布在环氧树脂中,环氧树脂包覆在玻璃纤维表面,通过玻璃纤维间的搭接形成导电通路。这种独特的结构使该复合材料的渗滤阈值低于聚丙烯/炭黑和聚丙烯/环氧树脂/炭黑复合体系的渗滤阈值。玻璃纤维和环氧树脂含量分别需要达到约10%,复合材料才能具有抗静电和导电作用。     

复合电极用导电树脂的制备

采用次中温环氧树脂(EP)固化剂(8104)、E-51 EP、导电石墨制备了水处理复合电极用导电树脂,树脂经惰性稀释剂稀释后,采用喷涂工艺把导电树脂喷附在钢板上,经80℃固化后,制造出复合电极.试验结果表明,导电树脂具有较好的导电性、耐酸碱性能和粘接性能,很好满足了水处理复合电极的使用要求.     

文摘

石墨/炭黑改性树脂导电复合材料的电学性能研究[刊,中]/杨小健,何为,王守绪,等//化工新型材料,2012,40(2):91-94以改性环氧树脂为基体,石墨/炭黑为混合导电填料制备了导电复合材料。分析了材料的导电机理,研究导电填料含量与电阻率之间的关系。结果表明,当石墨为15%、炭黑     

Carbon Nanomaterial–Reinforced Epoxy Composites: A Review

Conducting fillers such as graphite, carbon nanotubes, and carbon nanofibers are used as reinforcing agents for enabling the conducting behavior of epoxy resin. The present review focused on the work related to epoxy composite with reinforcement of various nanofillers. Different methods of preparation for epoxy-based conducting nanocomposites are summarized. Various characterization techniques of epoxy composites such as Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy are discussed. Important properties of epoxy-based nanocomposites are explained with different applications of epoxy-based conducting polymers.     

改性环氧树脂研究现状及分析

介绍了环氧树脂的优良特性以及改性环氧树脂的一些方向,分别介绍了环氧树脂的直接改性、固化体系改性、稀释剂改性的研究进展。详细陈述了添加橡胶弹性体、有机硅、有机纤维、纳米氧化物粉体、室温柔性固化剂、含磷同化剂、环氧丙烷苄基醚稀释剂、CMP410、硅氧烷活性稀释剂改性环氧树脂的原理。对改性环氧树脂的存在问题进行分析,展望改性环氧树脂未来的研究方向。     

Preparation of nano‐Ag particles and their modification on the mechanical and dielectric properties of epoxy resin

Nano‐Ag particles stabilized by a hyperbranched polymer (HBP) template were prepared for modifying the epoxy resin. The effects of preparation condition on the size and size distribution of Ag colloidal particles were studied. The Ag@HBP particles were then compounded with the epoxy resin to obtain the Ag@HBP/epoxy composites and the mechanical and dielectric properties of these composites were investigated. Dynamic mechanical analysis results show that the composites have higher loss factors than does the unmodified epoxy resin, which indicate better dissipation of mechanical energy and hence better shock or impact resistance. Fracture morphology of the composite shows a toughness feature. From the dielectric test results, the breakdown strength and dielectric constant of the composites at room temperature are increased, which can be explained by the Coulomb block effect. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers     

导热型环氧复合材料的研究进展

介绍了导热型环氧复合材料导热性能和导热机理。并综述各类导热环氧复合材料的研究进展,在此基础上讨论提高复合材料导热性能的途径。     

An efficient fully bio‐based reactive diluent for epoxy thermosets: 2‐[(Oxiran‐2‐ylmethoxy) methyl] furan versus a petroleum‐based counterpart

Furfuryl alcohol and bio‐based epichlorohydrin were used to prepare a fully bio‐based reactive diluent, 2‐[(oxiran‐2‐ylmethoxy) methyl] furan (FOM). After spectral characterization, FOM was blended with epoxy resin, diglycidylether bisphenol A (DGEBA), at different ratios for reducing the viscosity. For a comparison, Cardura (one of the most common commercial reactive diluents), was separately incorporated to DGEBA. Amine‐curing process of the blends was recorded by FTIR and DSC. Similar trends of curing progression for DGEBA containing the reactive diluents were observed. Thermogravimetric analysis and dynamic mechanical thermal analysis, mechanical (hardness, adhesion, and stress–strain) and morphological properties were also investigated to study characteristics of the epoxy matrices formulated with FOM or Cardura. It was concluded that FOM could be considered as an efficient reactive diluent in formulations of polymer composites, structural adhesives and surface coatings based on epoxy resins. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44957.     

杂醇油综合利用研究进展

杂醇油是发酵法制乙醇时的副产品,如不加以回收利用,会对环境造成污染。从分离和反应制备两个角度综述了杂醇油的分离提纯利用,杂醇油制备增塑剂、环氧树脂活性稀释剂、煤泥浮选剂、香料等的应用。通过蒸馏法、脱水处理以及合成制备的方式,来对杂醇油的综合利用进行深入的分析研究。     

Effect of epoxy resin on morphology and physical properties of PVC/organophilic montmorillonite nanocomposites

Poly(vinyl chloride)/organophilic montmorillonite (PVC/OMMT) nanocomposites were prepared by means of melt blending. A liquid epoxy resin was used to aid PVC chains in intercalating into silicate layers. The effects of the preparation methods and epoxy resin contents on the melt intercalation of PVC were investigated. The morphology development, mechanical properties and optical properties of the PVC/OMMT composites were tested as functions of epoxy resin content and OMMT content. Wide‐angle X‐ray diffraction, transmission electron microscopy and scanning electron microscopy were used to characterize the morphology of the resulting composites. After being pretreated by the epoxy resin, the OMMT layers were largely intercalated into the PVC matrix, and even exfoliated at high epoxy resin content. The addition of epoxy resin led to a decrease in optical clarity of the composites but improved the processing stability, as indicated by yellowness index and haze measurement. However, the optical clarity of the composites containing 4 phr of epoxy resin (PVC/E‐OMMT) was improved by increasing the OMMT content, as shown by light transmission. Both the tensile strength and notched Izod impact strength of the PVC/E‐OMMT composites reached their maximum values when the OMMT content was 0.5 phr and the epoxy resin content was 2 phr. With further increase of the OMMT content and the epoxy resin content, the tensile strength decreased but was still higher than that of original PVC. The method of addition of epoxy resin had little effect on the physical properties but mainly influenced the morphology of PVC/OMMT nanocomposites. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 2184–2191, 2003     

Synthesis of halogenated phenyl glycidyl ethers and their use for flame retardancy of polymeric materials

This study deals with the synthesis of halogenated derivatives of phenyl glycidyl ether and with possibilities of their use as flame retardants and reactive diluents of epoxy resin. The best reaction conditions optimized by Nelder-Mead simplex method were found. The products of very high quality were prepared. They were mixed with a lowmolecular epoxy resin and cured by diamino diphenyl methane. The viscosity of the resin mixtures and limiting oxygen index of cured systems were determined. It was found that a higher content of halogen, both chlorine and bromine, causes increasing viscosity and reduced flammability of the epoxides.     

钛酸钾晶须在环氧树脂中的应用研究

采用两种方法制备了钛酸钾晶须(简称"晶须")改性环氧树脂(EP)复合材料。考察了晶须含量、偶联剂种类、制备方法等对复合材料拉伸性能、弯曲性能和冲击性能的影响,并用扫描电子显微镜观察了纯EP及EP/晶须复合材料断面的形态结构。结果表明,晶须能较好地分散于EP基体中,起到增强增韧的效果。     

Preparation of epoxy resin using n-hexadecane based shape stabilized PCM for applying wood-based flooring

Epoxy resin has excellent characteristics of moisture, low toughness, solvent and chemical resistance, low shrinkage on cure, superior electrical and mechanical resistance properties, and good adhesion to many substrates. In this experiment, we prepared epoxy resin with shape stabilized phase change material (SSPCM) to enhance the thermal properties of epoxy resin. The SSPCM was prepared through the vacuum impregnation method, and the SSPCM/epoxy resin composites were prepared through the shear stirring process and curing process. In the preparation process, the epoxy resin and hardener were mixed in a beaker at a one-to-one ratio. Then, 5, 10, 15, and 20 wt.% of the SSPCM was added to the mixture. The thermal properties and chemical properties of epoxy resin with SSPCM were analyzed from scanning electron microscopy, differential scanning calorimetry, thermal gravimetric analysis, and universal testing machine analyzer. From the analysis, we determined that the prepared epoxy resin with SSPCM has heat storage capacity and high thermal conductivity, compared with the epoxy resin.