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近5年问世的聚合物/无机物纳米复合材料的阻燃性 总被引:2,自引:0,他引:2
综述了近5年问世的无机纳米填料包括碳纳米管(CNT)、层状氧化石墨(LGO)、层状双氢氧化合物(LDH)、多面低聚硅倍半氧烷(PO SS)及纳米碳纤维(CNF)等的复合材料研究进展,重点在于这些材料阻燃性能的特点及与聚合物/层状硅酸盐纳米复合材料(PLSN)的比较,并给予实例阐明。 相似文献
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Seungki Jo Seungjun Choo Fredrick Kim Seung Hwae Heo Jae Sung Son 《Advanced materials (Deerfield Beach, Fla.)》2019,31(20)
The growing concern over the depletion of hydrocarbon resources, and the adverse environmental effects associated with their use, has increased the demand for renewable energy sources. Thermoelectric (TE) power generation from waste heat has emerged as a renewable energy source that does not generate any pollutants. Recently, ink‐based processing for the preparation of TE materials has attracted tremendous attention because of the simplicity in design of power generators and the possibility of cost‐effective manufacturing. In this progress report, recent advances in the development of TE inks, processing techniques, and ink‐fabricated devices are reviewed. A summary of typical formulations of TE materials as inks is included, as well as a discussion on various ink‐based fabrication methods, with several examples of newly designed devices fabricated using these techniques. Finally, the prospects of this field with respect to the industrialization of TE power generation technology are presented. 相似文献
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PP共混增韧改性的研究及应用进展 总被引:4,自引:0,他引:4
综述了国内外PP增韧化共混改性的研究和应用,包括弹性体改性,聚合物改性和无机粒主性的研究与应用进展。 相似文献
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无机物改性酚醛树脂耐热性的研究进展 总被引:2,自引:1,他引:1
介绍了酚醛树脂(PF)的特点及优势。从金属元素改性PF、非金属元素改性PF(包括硼改性PF、磷改性PF等)、纳米材料改性PF(包括碳纳米材料改性PF、层状硅酸盐材料改性PF、纳米氧化物改性PF、金属纳米粒子改性PF等)和复合改性PF等方面论述了无机改性PF的研究进展,并对无机物改性PF的发展前景进行了展望。 相似文献
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聚苯硫醚复合材料的研究和应用 总被引:1,自引:0,他引:1
对聚苯硫醚(PPS)共混是材料获得更优性能和特殊新功能便捷有效的办法。本文概述了国内外聚苯硫醚复合材料研究的最新进展,对PPS/无机物和PPS/聚合物两大类共混体系的结构和性能进行了全面的介绍。 相似文献
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Stephen M. Nandwa 《Nutrient Cycling in Agroecosystems》2001,61(1-2):143-158
In Eastern and Southern Africa, the shifting from the no-external input agriculture (shifting cultivation through slash and
burn) to intensified agricultural systems has resulted in widespread agro-ecosystems with high soil organic carbon and nutrient
depletion. This is quite evident in farming systems with reduced fallow period or those that practice continuous cropping
without or with little inputs. Long-term experiments indicate that losses of up to 0.69 t carbon ha−1 yr−1 in the soil surface layers are common. Such losses are commonly reported by farmers engaged in participatory community-based
research development projects. This calls for judicious strategies for recapitalization or replacement of these depletions.
Such strategies include direct SOC replenishment through addition of organic materials, notably manures, wastes, residues
and plant litter; biomass transfer; incorporation of improved fallows in the farming systems. Indirect contribution to SOM
replenishment or recapitalization may be achieved through inorganic fertilizations and amendments; legume integration in the
production system; and combined inorganic and organic inputs. Research is required to identify inputs that help meet both
nutrients availability while contributing to SOC build up at the same time.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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David G. Calatayud Teresa Jardiel Erica Cordero-Oyonarte Amador C. Caballero Marina Villegas Ana Valle-Noguera Aranzazu Cruz-Adalia Marco Peiteado 《International journal of molecular sciences》2022,23(6)
In recent decades, the demand for biomedical imaging tools has grown very rapidly as a key feature for biomedical research and diagnostic applications. Particularly, fluorescence imaging has gained increased attention as a non-invasive, inexpensive technique that allows real-time imaging. However, tissue auto-fluorescence under external illumination, together with a weak tissue penetration of low wavelength excitation light, largely restricts the application of the technique. Accordingly, new types of fluorescent labels are currently being investigated and, in this search, phosphorescent nanoparticles promise great potential, as they combine the interesting size-dependent properties of nanoscale materials with a long-lasting phosphorescence-type emission that allows optical imaging well after excitation (so avoiding autofluorescence). In this work, core-shell structures consisting of SrAlO:Eu,Dy luminescent cores encapsulated within a biocompatible silica shell were prepared, showing a green persistent phosphorescence with an afterglow time of more than 1000 s. A high-energy ball milling procedure was used to reduce the size of the starting phosphors to a size suitable for cellular uptake, while the silica coating was produced by a reverse micelle methodology that eventually allows the excitation and emission light to pass efficiently through the shell. Confocal fluorescence microscopy using HeLa cancer cells confirmed the potential of the all-ceramic composites produced as feasible labels for in vitro optical imaging. 相似文献
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《塑料、橡胶和复合材料》2013,42(8):306-313
In this study, different proportions of hollow glass microsphere (HGM) filled thermoplastic polyurethane (TPU) elastomer composites were prepared by normal vane extruder. The phase morphology, rheological properties, mechanical properties and thermal stability of TPU/HGM composites were investigated in detail. It was observed that the incorporation of HGM increased the thermal stability of TPU. With the increase in HGM content from 5 to 20?wt-%, the glass transition temperature, storage modulus and complex viscosity values increased continuously, while the density of the composite monotonously decreased. Moreover, the tensile modulus of the composites increased from 43.5 to 81.3?MPa. The results showed that, although raw HGM was used without any modification, the HGM played an important role in improving the properties of TPU. 相似文献