共查询到19条相似文献,搜索用时 93 毫秒
1.
2.
3.
聚合物/层状无机物纳米复合材料的研究进展 总被引:32,自引:0,他引:32
介绍了适于制备有机/无机纳米复合材料的层状无机物的类型和有机物嵌入到层状无机物夹层中的影响因素;总结了聚合物/层状无机物纳米复合材料的制备方法、结构与性能特征及潜在的应用前景。 相似文献
4.
5.
6.
熔融插层制备聚合物-层状硅酸盐纳米复合材料研究进展 总被引:9,自引:0,他引:9
概述了近年来国内外聚合物—层状硅酸盐纳米复合材料(PLSN)制备领域的研究状况,详细评述和分析了PLSN熔融插层法的特点,指出熔融插层是一种高效和可行的制备聚合物—层状硅酸盐纳米复合材料的方法。 相似文献
7.
氯丁橡胶/蛭石纳米复合材料的研究 总被引:3,自引:0,他引:3
以蛭石和氯丁橡胶为原料,采用溶液插层法将氯丁橡胶插入蛭石层间,制备聚合物层状硅酸盐纳米复合材料,用X射线衍射仪对样品进行分析测试,结果表明,得到了剥离型氯丁橡胶/蛭石纳米复合材料。 相似文献
8.
插层法制备聚合物基纳米复合材料研究进展 总被引:5,自引:0,他引:5
聚合物基纳米复合材料具有常规聚合物基复合材料所没有的结构、形态以及较常规聚合物基复合材料具有更优异的力学性能、耐热性能和气体液体阻隔性能等而显示出重要的科学意义和应用前景。本文综述插层法制备聚合物基纳米复合材料近几年的研究进展情况,总结了层状硅酸盐结构、插层剂选择、制备方法等问题。对制备过程进行了热力学和动力学分析,介绍了纳米复合材料表征方法,并对纳米复合材料的性能和应用进行了讨论。 相似文献
9.
10.
熔融插层法制备聚合物/层状硅酸盐纳米复合材料的调控因素 总被引:1,自引:0,他引:1
综述了熔融插层法制备聚合物/层状硅酸盐纳米复合材料的调控因素,分析了插层过程中复合体系、加工工艺、热力学和动力学因素对聚合物插层与层状硅酸盐片层剥离分散的影响.并展望了聚合物/层状硅酸盐纳米复合材料的研究前景。 相似文献
11.
聚合物-层状硅酸盐纳米复合材料是近20年来的研究热点,而计算机模拟已经逐渐发展为科学研究的重要手段。文中系统综述了计算机模拟在聚合物-层状硅酸盐纳米复合材料机理研究中的应用,介绍了适用于此类材料的模拟方法和力场,并重点论述了计算机模拟用于研究有机粘土的结构、纳米复合材料中各个组分间的相互作用,以及对纳米复合材料力学性能预测的研究现状。最后指出了本领域存在的问题并对前景进行了展望。 相似文献
12.
In recent times, polymer-layered silicate nanocomposites have drawn a great deal of attention because they often exhibit tremendous
improvements in material properties compared with virgin polymers or conventional micro- or macro-composites. In the present
study, nanocomposites were developed from organically modified clay and poly(ethylene-co-vinyl acetate-co-carbon monoxide) by melt mixing. FTIR spectroscopy reveals that the interaction between the organoclay and EVACO is thermodynamically
favored. High resolution wide angle X-ray diffraction and transmission electron microscopy were used to study the morphology
of the nanocomposites. Elemental mapping by scanning electron microscopy indicates good dispersion and distribution of the
nanoclay in EVACO matrix. The mechanical properties of the nanocomposites are optimum at a clay loading of 3%. 相似文献
13.
Sedigheh Bagheri-Kazemabad Daniel Fox Yanhui Chen Luke M. Geever Alireza Khavandi Reza Bagheri Clement L. Higginbotham Hongzhou Zhang Biqiong Chen 《Composites Science and Technology》2012
The objective of this study was to investigate the effects of two compatibilizers, namely maleated polypropylene (PP-g-MA) and maleic anhydride grafted poly (ethylene-co-octene) (EOC-g-MA), on the morphology and thus properties of ternary nanocomposites of polypropylene (PP)/ethylene–octene copolymer (EOC)/clay nanocomposite. In this regard the nanocomposites and their neat polymer blend counterparts were processed twice using a twin screw extruder. X-ray diffraction, transmission electron microscopy, Energy dispersive X-ray spectroscopy, and scanning electron microscopy were utilized to characterize nanostructure and microstructure besides mechanical and rheological behaviors of the nanocomposites. Clay with intercalated structure was observed in EOC phase of the PP/EOC/clay nanocomposite. Better dispersion state of the intercalated clay in EOC phase was observed by adding EOC-g-MA as a compatibilizer. On the other hand, adding PP-g-MA resulted in migration of the intercalated clay from the EOC to the PP and to the interface regions. It was also demonstrated that the elastomer particles became smaller in size where clay was present. The finest and the most uniform morphology was found in the PP/EOC/clay nanocomposite. In addition, the rheological results illustrated a higher complex viscosity and storage modulus for PP/EOC/PP-g-MA/clay nanocomposite in which clay particles were present in the matrix. Mechanical assessments showed improvements in the toughness of the nanocomposites with respect to their neat blends, without significant change in stiffness and tensile strength values. These results highlight a toughening role of clay in the polymer blend nanocomposites studied. 相似文献
14.
Mainil M Alexandre M Monteverde F Dubois P 《Journal of nanoscience and nanotechnology》2006,6(2):337-344
High density polyethylene (HDPE)/clay nanocomposites have been prepared using three different functionalized polyethylene compatibilizers: an ethylene/vinyl acetate copolymer, a polyethylene grafted with maleic anhydride functions and a (styrene-b-ethylene/butylene-b-styrene) block copolymer. The nanocomposites were prepared via two different routes: (1) the dispersion in HDPE of a masterbatch prepared from the compatibilizer and the clay or (2) the direct melt blending of the three components. For each compatibilizer, essentially intercalated nanocomposites were formed as determined by X-ray diffraction and transmission electron microscopy. With the ethylene/vinyl acetate copolymer, a significant delamination of the intercalated clay in thin stacks was observed. This dispersion of thin intercalated stacks within the polymer matrix allowed increasing significantly the stiffness and the flame resistance of the nanocomposite. A positive effect of shear rate and blending time has also been put into evidence, especially for the process based on the masterbatch preparation, improving both the formation of thin stacks of intercalated clay and the mechanical properties and the flame resistance of the formed nanocomposites. 相似文献
15.
可生物降解性聚合物一层状硅酸盐纳米复合材料比聚合物基体有更好的力学强度、热稳定性、热变形温度、气体阻隔特性和更快的降解速率,表现出剪切变稀、模量升高、似固体行为等流变特性。文中综述了可生物降解性聚合物纳米复合材料的制备方法、表征手段、性能测试及其应用等方面的研究进展。 相似文献
16.
17.
Yang L Phua SL Teo JK Toh CL Lau SK Ma J Lu X 《ACS applied materials & interfaces》2011,3(8):3026-3032
A facile biomimetic method was developed to enhance the interfacial interaction in polymer-layered silicate nanocomposites. By mimicking mussel adhesive proteins, a monolayer of polydopamine was constructed on clay surface by a controllable coating method. The modified clay (D-clay) was incorporated into an epoxy resin, it is found that the strong interfacial interactions brought by the polydopamine benefits not only the dispersion of the D-clay in the epoxy but also the effective interfacial stress transfer, leading to greatly improved thermomechanical properties at very low inorganic loadings. Rheological and infrared spectroscopic studies show that the interfacial interactions between the D-clay and epoxy are dominated by the hydrogen bonds between the catechol-enriched polydopamine and the epoxy. 相似文献
18.
19.
S. Sánchez-Valdes E. Ramírez-Vargas M.C. Ibarra-Alonso L.F. Ramos de Valle J. Méndez-Nonell F.J. Medellín-Rodríguez J.G. Martínez-Colunga S. Vazquez-Rodriguez R. Betancourt-Galindo 《Composites Part B》2012,43(2):497-502
The compatibilization provided by itaconic acid (IA) and 2-[2-(dimethylamino)-ethoxy] ethanol (DMAE) functionalized polyethylene for forming polyethylene-based nanocomposites was studied and compared. IA was grafted into PE by melt mixing to obtain PEgIA (compatibilizer 1), thereafter, PEgIA was reacted with DMAE also by melt mixing to obtain PAgDMAE (compatibilizer 2). PE-clay nanocomposites were prepared by melt mixing polyethylene with each of the two quaternary ammonium modified montmorillonite clays (Cloisite 30B and Nanomer I28E) plus each of the two previously prepared compatibilizers (PEgIA and PEgDMAE). FTIR characterization confirmed the formation of these two compatibilizers. All the compatibilized nanocomposites had better clay exfoliation–intercalated compared to the uncompatibilized PE nanocomposites. X-ray diffraction and transmission electron microscopy results, as well as the mechanical properties attained showed that the PEgDMAE with the I28E clay produced the better exfoliated–intercalated nanocomposites. Samples with C30B clay did not show any intercalation improvement, as compared to the uncompatibilized samples, which was attributed mainly to the smaller initial intergallery spacing of this clay. Finally, it is concluded that the PEgDMAE offers an outstanding capability for preparing highly exfoliated PE clay nanocomposites. 相似文献