纳米白炭黑在氯丁橡胶中的应用研究

采用六甲基二硅氮烷改性处理白炭黑.研究了改性纳米白炭黑对氯丁橡胶的补强效果,并与普通炭黑的补强效果进行了对比.结果表明,纳米白炭黑对氯丁橡胶的补强作用较好,其硫化胶的定伸应力、拉伸强度和撕裂强度均随纳米白炭黑用量的增加而增大.说明纳米白炭黑可显著提高氯丁橡胶硫化胶的力学性能,具有推广价值.     

橡胶补强填充剂概览

加入各种补强性填料可提高橡胶制品的物理机械性能,延长使用寿命。除了常用的炭黑、白炭黑,该文还介绍了炭黑-白炭黑双相填充剂,以及改性高岭土、凹凸棒改性粘土、改性硬质陶土、纳米氧化锌等其他填充剂,并围绕轮胎技术对各种补强性填料进行了展望。     

纳米氧化锌/EPDM复合材料的性能研究

试验研究纳米氧化锌/EPDM复合材料的物理性能和导热性能,并与炭黑和白炭黑补强的EPDM胶料进行对比.结果表明,纳米氧化锌的导热性能明显优于炭黑和白炭黑等传统补强填料,其对EPDM具有较好的补强作用,纳米氧化锌/EPDM复合材料的生热较低;采用偶联剂Si69对纳米氧化锌进行原位改性可以改善纳米氧化锌粒子与EPDM间的界面作用,提高其分散性,从而显著提高复合材料的物理性能,降低生热;改性纳米氧化锌/EPDM复合材料的物理性能和导热性能良好,可用于动态工况下使用的橡胶制品.     

氯丁橡胶244与天然胶共混性能研究

摘要:本文主要研究了硫化体系和补强体系对氯丁橡胶与天然胶共混时性能的影响,其中主要涉及到氧化锌、氧化镁、普通硫磺、DM作为硫化体系以及碳黑N550和白炭黑作为补强体系时对共混胶料物理机械性能的影响。经过研究发现：氧化锌：氧化镁：普通硫磺：DM硫化促进剂=6：3：5：0.3时,扯断强度能达到：23.18MPa,硫磺对硫化胶料绍尔硬度的影响最大,硫化时间为60min时得到的物理机械性能最好,碳黑N550为40份、白炭黑为20份时,硫化胶料的物理机械性能最好。     

纳米白炭黑的表面改性及其在氯丁橡胶中的应用

研究纳米白炭黑经硅烷偶联剂(Si-75)湿法改性后对氯丁橡胶抗疲劳性能的影响，并对改性剂的用量、改性工艺条件进行了优化。实验结果表明：适当改性后的纳米白炭黑可显著提高氯丁橡胶的抗撕裂和抗疲劳性能。     

性纳米碳酸钙填料对氯丁橡胶性能影响的研究

使用甲基丙烯酸表面改性纳米碳酸钙,并研究改性碳酸钙对氯丁橡胶物理性能(拉伸强度、撕裂强度、伸长率、应力弛豫)及抗老化性能的影响。结果表明:甲基丙烯酸改性纳米碳酸钙能明显增大氯丁橡胶的撕裂强度,提高其体积电阻率和介质损耗,并改善其抗老化性能。但改性纳米碳酸钙会延长硫化氯丁橡胶体系硫化时间,且对其体系的补强作用只限于一定范围。     

硅橡胶补强填料的研究进展

纯硅橡胶的机械强度很低,添加补强填料是提高硅橡胶物理机械性能的主要手段。简要介绍了近年来有关气相法白炭黑、沉淀法白炭黑、短纤维与碳纳米管、纳米碳酸钙在硅橡胶补强中的应用研究概况。     

三种增强填料对交联POE强度的影响

研究了纳米碳酸钙、白炭黑、纳米高岭土作为交联POE的填料的补强效果。结果表明:白炭黑补强效果最好;纳米高岭土极易在表面改性,经含量为2%的铝酸酯偶联剂表面改性的纳米高岭土填料对交联POE有较强的补强作用,可完全取代纳米CaCO3,或部分替代白炭黑。     

纳米氧化锌在氯丁橡胶中的应用研究

用电子显微镜观察了纳米氧化锌的形貌、尺寸，研究了纳米氧化锌在氯丁橡胶胶料中作硫化剂时对胶料物理机械性能的影响，并选用普通氧化锌，国外某品牌氧化锌进行对比。结果发现，当纳米氧化锌与普通氧化锌用量同为5份时，含纳米氧化锌胶料的某些物理机械性能指标有提高，当纳米ZnO用量减至3份时与5份普通ZnO的力学性能相当。充分显示了纳米材料的尺寸效应，应用纳米氧化锌可以提高产品的力学性能，并能降低成本，具推广应用价值。     

原位法制备沉淀白炭黑／NR纳米复合材料的研究

以硅酸钠为前驱体,在天然胶乳凝固制备天然橡胶（NR）的过程中,原位生成沉淀白炭黑来制备沉淀白炭黑／NR纳米复合材料,扫描电镜（SEM）研究表明该方法可以成功得到沉淀白炭黑／NR纳米复合材料,物理机械性能研究表明沉淀白炭黑对NR有较好的补强作用,在纳米沉淀白炭黑用量为8份时复合材料的综合性能最好。     

负载型纳米氧化锌在橡胶中的应用研究

氧化锌作为一种良好的硫化活性剂,在橡胶生产中已被广泛使用,但锌基材料对人体健康和生态环境存在不良影响,因此如何在橡胶配方中减少锌的含量已经成为目前橡胶行业重要的研究课题。纳米氧化锌因为具有纳米粒子特有的优势,因此在使用中可以达到锌减量的目的,但纳米粒子容易团聚,限制了纳米效应的发挥;广东韶关凯鸿纳米材料有限公司开发了一种负载型的纳米氧化锌,将纳米氧化锌粒子包覆在载体上的新型制品,提高反应活性,减少团聚,可以使纳米氧化锌充分发挥纳米粒子的优势,同时有效的减少锌在橡胶制品中的残余量。本工作分别采用普通氧化锌、纳米氧化锌、负载型纳米氧化锌(C型、A型、S型)作为活化剂,其中负载型纳米氧化锌依据载体不同进行分类,C型的载体为碳酸钙,A型的载体为氧化铝,S型载体为二氧化硅。通过各项性能测试实验,重点研究负载型纳米氧化锌对橡胶综合性能的影响。实验结果表明,相对于普通氧化锌,负载型纳米氧化锌作为活化剂,可以在锌的使用量明显下降的情况下,制备出达到甚至优于普通氧化锌制品性能的橡胶复合材料。其中,3份用量的A型负载型纳米氧化锌的活化作用最优。     

Effect of nano zinc oxide on the cure characteristics and mechanical properties of the silica‐filled natural rubber/butadiene rubber compounds

With the increasing interest in environmental and health issues, legal restrictions, such as European Union (EU) End of Life Vehicle Directives, were strengthened. This led us to incorporate nano zinc oxide (nano‐ZnO), with particle sizes of 30–40 nm and specific surface areas of 25.0–50.0 m²/g, instead of conventional ZnO into natural rubber (NR)/butadiene rubber (BR) compounds to decrease the content of zinc in the formulation. In the unfilled system, only a 20 wt % nano‐ZnO content, compared to conventional zinc oxide content, showed the cure characteristics and mechanical properties of the same level. This was because the increase in the specific surface area of the nano‐ZnO led to an increase in the degree of crosslinking. The effect of nano‐ZnO on the cure characteristics and mechanical properties was more pronounced in the silica‐filled system than in the unfilled system. This was mainly because of the dispersing agent used in the silica‐filled system, which also improved the dispersion of nano‐ZnO. The silica‐filled NR/BR compounds containing 0.3–3.0 phr of nano‐ZnO showed improved curing characteristics and mechanical properties, such as optimum cure time, 100 and 300% modulus, tensile strength, and tear strength compared to the compound with 5 phr of conventional ZnO. The optimum amounts of nano‐ZnO and stearic acid were only 1.0 and 0.1 phr, respectively. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

纳米二氧化硅改性硬质聚氨酯泡沫塑料的研究

采用浇注成型法合成密度为250 mg/cm3的纳米SiO2改性硬质聚氨酯泡沫塑料(PUR-R),研究了纳米SiO2含量及偶联剂处理对纳米SiO2改性PUR-R的各种力学性能的影响。结果表明:直接使用纳米SiO2,可使PUR-R的某些力学性能得到提高,而偶联剂处理可进一步改善纳米SiO2对PUR-R的增强作用,用偶联剂改性过的纳米SiO2增强PUR-R与纯PUR-R相比,除断裂伸长率降低外,其他力学性能如拉伸强度、压缩强度、弯曲强度、冲击强度及弯曲模量等均有所提高。     

Application of nano‐zinc oxide master batch in polybutadiene styrene rubber system

The properties of nano‐zinc oxide master batch filled butadiene styrene rubber (SBR) systems were researched in comparison with those of common zinc oxide and nano‐zinc oxide filled systems. First, the nano‐zinc oxide master batch was prepared and the cure characteristics of three different kinds of zinc oxide filled SBR composites were studied; second, the mechanical properties and wear resistance were compared; then, the improved mechanical properties were confirmed by dynamic mechanical properties and transmission electron microscopy. Finally, the zinc oxide amount reducing mechanism was analyzed. Results show that nano‐zinc oxide master batch filled SBR system has better mechanical properties than those of nano‐zinc oxide and common zinc oxide filled systems, which is due to the improved dispersion by master batch mixing technology. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 922–930, 2006     

纳米纤维粉/氢氧化铝/CSM电缆料的制备及性能研究

采用机械共混法制备纳米纤维粉/氢氧化铝/氯磺化聚乙烯(CSM)电缆料,研究了CSM电缆料的硫化特性、力学性能、耐老化、耐介质及阻燃性能,并与氢氧化铝,或陶土、硼酸锌、滑石粉与氢氧化铝并用填充CSM电缆料的性能进行了对比;结果表明,纳米纤维粉填充胶的拉伸强度、硬度、300%定伸应力及撕裂强度最大,具有较好的耐老化、耐介质性能,胶料的氧指数稍小于硼酸锌填充胶,但明显大于滑石粉填充胶,纳米纤维粉与氢氧化铝并用产生了协同阻燃效果,提高了电缆料的阻燃性能.     

Preparation of nano‐zinc oxide/EPDM composites with both good thermal conductivity and mechanical properties

In this article, nano‐zinc oxide (ZnO) filled ethylene propylene diene monomer (EPDM) composites are prepared, and the mechanical (static and dynamic) properties and thermal conductivity are investigated respectively, which are further compared with the traditional reinforcing fillers, such as carbon black and nano‐silica. Furthermore, influence of in‐situ modification (mixing operation assisted by silane at high temperature for a certain time) with the silane‐coupling agent Bis‐(3‐thiethoxy silylpropyl)‐tetrasufide (Si69) on the nano‐ZnO filled composites is as well investigated. The results indicate that this novel reinforcing filler nano‐ZnO can not only perform well in reinforcing EPDM but can also improve the thermal conductivity significantly. In‐situ modification with Si69 can enhance the interfacial interaction between nano‐ZnO particles and rubber matrix remarkably, and therefore contribute to the better dispersion of filler. As a result, the mechanical properties and the dynamic heat build‐up of the nano‐ZnO filled composites are improved obviously by in‐situ modification, without influencing the thermal conductivity. In comparison with traditioanl reinforcing fillers, in‐situ modified nano‐ZnO filled composites exhibit the excellent performance in both mechanical (static and dynamic) properties and better thermal conductivity. In general, our work indicates that nano‐ZnO, as the novel thermal conductive reinforcing filler, is suitable to prepare elastomer products serving in dynamic conditions, with the longer expected service life. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

纳米氧化锌在轮胎胶料中的应用研究

介绍了纳米氧化锌在轮胎胶料配方中的实际应用情况。由于纳米材料物有的小尺寸效应和表面效应，纳米氧化锌具有多功能性助剂的作用。应用研究表明，纳米氧化锌在基本不降低扯断伸长率的情况下，能明显提高胶料的300％定伸应力，且随材料比表面积的增大这种趋势愈加明显，胶料的磨耗量和压缩疲劳温升降低也更明显，另外，硫化曲线有整体随时间后移的倾向。纳米氧化锌减量50％使用可提高轮胎实际行驶里程约6.25%。     

纳米氧化锌对橡胶性能的影响研究

研究了纳米氧化锌对胶料物理性能的影响。纳米氧化锌因其粒径小,表面积大,吸附活性大,从而具有表面效应和高活性;采用纳米氧化锌可提高胶料的耐磨性,H抽出力和撕裂性能,同时纳米氧化锌可以与橡胶分子实现分子水平上的结合,即纳米材料与橡胶分子的接枝作用,达到提高胶料性能的目的。     

Preparation and Use of Nano Zinc Oxide in Neoprene Rubber

Zinc oxide (ZnO) of nanometer particle size was prepared by solid-state pyrolytic method. TEM, XRD, and surface area studies showed that the prepared zinc oxide had particle size in the range of 15–30 nm and surface area in the range of 12–30 m²/g. This nano zinc oxide was used as a curing agent in neoprene rubber. The optimum dosage of ZnO was found to be low compared to commercial ZnO. The cure characteristic and mechanical properties were compared with those containing conventional ZnO. It was found that a low dosage of zinc oxide was enough to give equivalent curing and mechanical properties compared to one containing a higher dosage (5 phr) of commercial zinc oxide in neoprene rubber.     

纳米级SiOx与硅灰对水泥基材料的复合改性效应研究

用TEM测试评价了纳米级SiOx与硅灰的颗粒形貌，在分别研究纳米级SiOx硅灰的活性和其对水泥基复合材料改性的基础上，将纳米级SiOx与硅灰复合作为高活性的组合料，探索了对水泥基材料的复合改性效应，除进行宏观力学性能测试评价之外，用DTA，XRD和SEM分析了水泥基材料的组成、显微结构。研究表明，纳米级SiOx和硅灰具有很高的活性和表面效应，水泥石基体相的显微结构致密，CSH凝胶交织成致密的网状结构，结构缺陷显著降低。DTA，XRD分析表明，水泥石中Ca(OH)2明显减少，由Ca(OH)2带来的砂浆和混凝土集科界面过渡区的缺陷将大大改善。此外，纳米级SiOx与硅灰复合后对砂浆的力学性能改善效果比水泥净浆更为显著。