共查询到19条相似文献,搜索用时 109 毫秒
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采用钛酸酯对纳米贝壳粉(SP)进行了表面改性,并制备了改性纳米贝壳粉;通过与天然胶乳共混,制备了天然橡胶/贝壳粉(NR/SP)纳米复合材料;使用傅里叶红外光谱仪、扫描电子显微镜、表面接触角测定仪、XRD衍射分析仪、激光粒度仪和电子拉力试验机等研究了改性纳米贝壳粉对天然橡胶纳米复合材料力学性能的影响。结果表明,改性剂钛酸酯成功地偶联到贝壳粉表面,经过表面化学改性后贝壳粉表面接触角由73.5°增大到110.8°;当纳米贝壳粉用量为10%时,NR/SP复合材料可获得最佳力学性能,拉伸强度可达到34.05MPa。 相似文献
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天然橡胶/固相改性钙基蒙脱土纳米复合材料的结构与性能 总被引:2,自引:1,他引:1
采用固相改性方法对钙基蒙脱土进行了有机改性,通过机械混炼法插层制备了天然橡胶/蒙脱土纳米复合材料。利用X射线衍射仪(XRD)和透射电镜(TEM)表征了纳米复合材料的结构和形态,通过硫化仪和表观交联密度研究了橡胶与蒙脱土的相互作用,同时考察了不同偶联剂改性的蒙脱土/天然橡胶复合材料的静态力学性能和动态力学性能。研究结果发现:有机蒙脱土不但对天然橡胶具有很好的促进硫化作用,而且具有明显的补强效果,可大幅度提高材料的力学性能,同时改善天然橡胶动态力学性能。 相似文献
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以天然胶乳浸润槟榔纤维,制备天然橡胶(NR)复合材料,研究偶联剂Si69-纳米氧化锌改性槟榔纤维对NR复合材料性能的影响。结果表明:与未改性槟榔纤维的NR复合材料相比,偶联剂Si69-纳米氧化锌改性槟榔纤维的NR复合材料的物理性能、耐溶剂性能和抗湿滑性能改善,剪切模量减小,滚动阻力提高;偶联剂Si69-纳米氧化锌改性槟榔纤维的NR复合材料的综合性能优于偶联剂Si69和纳米氧化锌单独改性槟榔纤维的NR复合材料。 相似文献
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采用原位改性纳米氧化铝制备纳米氧化铝/天然橡胶(NR)复合材料,研究纳米氧化铝用量及原位改性时间、偶联剂Si69用量对纳米氧化铝/NR复合材料的物理性能、动态力学性能和导热性能的影响。结果表明:随着纳米氧化铝用量的增大,复合材料的拉伸强度减小,热导率和压缩疲劳温升增大。原位改性可以提高纳米氧化铝与NR之间的界面结合作用。随着原位改性时间的延长或随着偶联剂Si69用量的增大,复合材料的拉伸强度和热导率均先增大后减小,压缩疲劳温升逐渐减小。 相似文献
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M. Valera-Zaragoza A. Yescas-Yescas E. A. Juarez-Arellano A. Aguirre-Cruz A. Aparicio-Saguilán E. Ramírez-Vargas S. Sepúlveda-Guzmán S. Sánchez-Valdes 《Polymer Bulletin》2014,71(6):1295-1313
Natural rubber/organoclay/titanium dioxide nanocomposites were obtained via mechanical blending using rubber latex, organically modified montmorillonite clay (cloisite 30B) and titanium dioxide (TiO2). Glycerol was utilized as a dispersant for the inorganic components. Scanning electron microscopy analysis shows that TiO2 nanoparticles were deposited on the clay surface and that the clay–TiO2 combination was homogeneously dispersed on the natural rubber. The high aspect ratio and the polar character of the clay layers allowed interactions with individual nanoparticles of TiO2. The X-ray diffraction patterns reveal an increment of the crystalline character of the NR/C30B/TiO2 nanocomposites as a consequence of the nanoscale dispersion of the TiO2 particles. Infrared Spectroscopy spectra indicate compatibility between natural rubber and glycerol due to the formation of hydrogen bonds. A mechanism in particle–natural rubber compatibility, in which glycerol is involved, is proposed. However, nanoscale dispersion was largely dependent on the clay–TiO2 interactions. This work proposes an easy method to immobilize TiO2 nanoparticles on clay layers, which allows their dispersion in polymers. Nanocomposites obtained by this method can be used for supports of photocatalyst molecules. 相似文献
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橡胶纳米复合材料研究进展 总被引:1,自引:0,他引:1
对蒙脱土的结构、纳米材料的制备及橡胶纳米复合材料的一些特性作了简要介绍。分析了橡胶增强中几个主要因素的作用和地位,认为粒径是橡胶增强的第一要素,粒径因素包括部分表面活性因素和结构性因素,纳米增强是橡胶高效增强的必要条件,并指出炭黑和白炭黑增强橡胶属于纳米复合材料范畴。以橡胶纳米复合材料的制备方法(主要有:插层复合法、溶胶~凝胶法、原位分散法、和纳米直接共混法)为线索综述了橡胶基纳米复合材料的研究进展,分析了各种方法的优缺点及对其应用前景进行了展望。 相似文献
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The aim of this work was to prepare and characterize the natural rubber vulcanizates containing different amounts of titanium dioxide particles. At first, a rubber mixture was prepared using a laboratory two-roll mill and then samples were vulcanized by a hydraulic press. The formulation of the rubber mixture and rubber-processing technique were based on our earlier investigations. Samples were obtained with different titanium dioxide loadings of 15, 25, 45, and 85 parts by weight per hundred parts of natural rubber. This research is focused on the determination of the influence of different loadings of titanium oxide particles on the chemical structure, morphology, mechanical and thermo-mechanical properties of the natural rubber-based composites. It was found that vulcanizates with different amounts of TiO2 particles possess good characteristic in terms of all measured properties. The results of Fourier transform infrared spectroscopy analysis showed that the chemical structure of the obtained natural-based composites was not influenced by titanium dioxide particles. The SEM micrographs showed the uniform dispersion of TiO2 particles in the natural rubber matrix. The agglomeration of filler was seen at the higher contents of TiO2 in the matrix. The thermogravimetric analysis showed slightly different thermal stability for the obtained natural rubber composites. The dynamic mechanical thermal analysis showed that the prepared materials have similar glass transition temperatures. However, increase in the content of titanium dioxide in the obtained materials is connected with higher energy loss (higher dissipation of energy) during the mechanical work of material and higher cross-link density of the prepared materials. 相似文献
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Effect of surface modification of silicon carbide nanoparticles on the properties of nanocomposites based on epoxidized natural rubber/natural rubber blends
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Improvement of the properties of rubber nanocomposites is a challenge for the rubber industry because of the need for higher performance materials. Addition of a nanometer‐sized filler such as silicon carbide (SiC) to enhance the mechanical properties of rubber nanocomposites has rarely been attempted. The main problem associated with using SiC nanoparticles as a reinforcing natural rubber (NR) filler compound is poor dispersion of SiC in the NR matrix because of their incompatibility. To solve this problem, rubber nanocomposites were prepared with SiC that had undergone surface modification with azobisisobutyronitrile (AIBN) and used as a filler in blends of epoxidized natural rubber (ENR) and natural rubber. The effect of surface modification and ENR content on the curing characteristics, dynamic mechanical properties, morphology and heat buildup of the blends were investigated. The results showed that modification of SiC with AIBN resulted in successful bonding to the surface of SiC. It was found that modified SiC nanoparticles were well dispersed in the ENR/NR matrix, leading to good filler‐rubber interaction and improved compatibility between the rubber and filler in comparison with unmodified SiC. The mechanical properties and heat buildup when modified SiC was used as filled in ENR/NR blends were improved. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45289. 相似文献
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