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hollow silica spheres
相关语句
  空腔硅球的
     Preparation of Core-Shell Polystyrene/ Silica Composite Microspheres and Hollow Silica Spheres
     核-壳式聚苯乙烯/二氧化硅复合微球及空腔硅球的制备
短句来源
  “hollow silica spheres”译为未确定词的双语例句
     pH value and the initial Cd(II) concentration of the solution remarkably affect the Cd(II) adsorption capability of the hollow silica spheres.
     在pH>3的弱酸性溶液中比在pH≤3的酸性条件下中空SiO2微球吸附Cd(II)离子的量要大得多。
短句来源
     mol·L~(-1),the initial concentration of Cd(II) shows very little influence on the Cd(II) adsorption,however,the adsorption of Cd(II) by the hollow silica spheres is significantly improved if further increasing the initial concentration of Cd(II)in the solution.
     L-1时,Cd吸附量随Cd(II)离子初始浓度的影响较小,进一步增大Cd(II)离子初始浓度,吸附量大幅攀升。
短句来源
     A Facile Approach for the Fabrication of Monodisperse Hollow Silica Spheres
     一种制备单分散SiO_2空心微球的新方法
短句来源
     Based on the experimental results and discussion, a possible formation mechanism of the hollow silica spheres was proposed.
     对SiO2空心微球进行测试表征,提出了SiO空心微球的可能形成机制.
短句来源
  相似匹配句对
     Synthesis and Characterization of Hollow Mesoporous Silica Fibers
     纳米介孔二氧化硅中空纤维的合成
短句来源
     Effect of surfactant on structure of silica hollow microspheres
     表面活性剂对二氧化硅空心微球结构的影响
短句来源
     Synthesis and Characterization of Nanometer Silica Hollow Capsules
     纳米二氧化硅空心胶囊的制备与表征
     Hollow Man
     透明人
短句来源
     A Facile Approach for the Fabrication of Monodisperse Hollow Silica Spheres
     一种制备单分散SiO_2空心微球的新方法
短句来源
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The core-shell polystyrene/silica composite microspheres with tailored dimensions and compositions were prepared by layer-by-layer self-assembling. The polymer cores were removed by calcination and hollow silica spheres with tailored wall thickness were produced. TEM photographs showed that silica nanoparticles formed a uniform shell round the core, which turned into a clear-cut hollow sphere after calcination. TG revealed that silica content within the composite microspheres increased...

The core-shell polystyrene/silica composite microspheres with tailored dimensions and compositions were prepared by layer-by-layer self-assembling. The polymer cores were removed by calcination and hollow silica spheres with tailored wall thickness were produced. TEM photographs showed that silica nanoparticles formed a uniform shell round the core, which turned into a clear-cut hollow sphere after calcination. TG revealed that silica content within the composite microspheres increased with the assembled nano silica diameter. Both the successful assembly of Si02 and the complete removal of PS can be verified by FIIR comparison of PS, Si02, composite microspheres and the powders after heating treatment. With the same number layers of nanoparticles adsorpted on the latex cores, the larger the selected Si02 nanoparticles diameter (10nm, 20nm, 40nm), the larger the composite microspheres diameter, and the thicker the hollow spheres' wall.

利用层层自组装的方法制备了粒径和组成可裁剪、具有核-壳式结构的单分散聚苯乙烯(PS)/二氧化硅(SiO_2)复合微球.对复合微球进行热处理除去有机物中心,制备出壁厚可剪裁的空腔硅球.透射电镜(TEM)照片显示二氧化硅纳米颗粒在中心外生成均匀壳层,而煅烧后则可得到轮廓分明的球形空腔;热重分析(TG)说明复合球体的硅含量随着所组装的纳米二氧化硅的粒径的增加而增加;比较PS、SiO_2、复合球体及热处理后的粉体的红外光谱,可分别验证二氧化硅的成功组装和热处理过程中作为中心的PS的完全去除.在吸附相同层的前提下,随着所选用的二氧化硅纳米粒子(10um,20um,40um)的粒径的增大,复合微球的粒径增大,空腔球体的壁厚增加.

The core-shell polystyrene (PS)/silicon dioxide (SiO2) composite microspheres with tailored dimensions and compositions were prepared by layer-by-layer self-assembly. The organic cores were removed by heat treatment and hollow silica spheres with tailored wall thickness were produced. The thermal decomposition process of the composite microspheres was studied. TEM photographs showed that SiO2 nanoparticles formed a uniform shell round the core, which turned into a clear-cut hollow sphere after...

The core-shell polystyrene (PS)/silicon dioxide (SiO2) composite microspheres with tailored dimensions and compositions were prepared by layer-by-layer self-assembly. The organic cores were removed by heat treatment and hollow silica spheres with tailored wall thickness were produced. The thermal decomposition process of the composite microspheres was studied. TEM photographs showed that SiO2 nanoparticles formed a uniform shell round the core, which turned into a clear-cut hollow sphere after calcination. The successful assembly of SiO2 and the complete removal of PS which acted as the core in heat treatment, can be respectively verified by FTIR comparison of PS, SiO2, composite microspheres and the powders after heat treatment. Assuming the same number of absorbed layers, with the increase of the selected SiO2 nanoparticles diameter (10, 20, 40 nm), the composite microsphere diameter increases, the hollow spheres wall thickens, and the active energy of thermal decomposition of the core particles increases. The thermal decomposition of the composite microspheres fits in with the D3 diffusion mechanism.

利用层层自组装的方法制备了粒径和组成可裁剪、具有核-壳式结构的单分散聚苯乙烯(PS)/二氧化硅(SiO2)复合微球. 对复合微球进行热处理除去有机物中心,制备出壁厚可剪裁的空腔硅球,并对复合微球的热分解过程进行了研究. 透射电镜(TEM)照片显示二氧化硅纳米颗粒在中心外生成均匀壳层,而煅烧后则可得到轮廓分明的球形空腔;比较PS, SiO2和复合球体及热处理后的粉体的红外光谱,可分别验证二氧化硅的成功组装和热处理过程中作为中心的PS的完全去除. 在吸附相同层数的前提下,随着所选用的二氧化硅纳米粒子的粒径的增大(10~40 nm),复合微球的粒径增大,空腔球体的壁厚增加,中心粒子热分解的活化能增大. 复合微球的热分解机理符合三维扩散机理.

Uniform hollow nanostructural hollow silica microsphers were produced by the layer-by-layer electrostatic self-assembly technique. The core-shell microspheres were constructed by alternately depositing positive polyelectrolyte PDDAMAC and silica nanoparticles (10nm, 20nm) onto the polystyrene PS microspheres which were used as the colloidal templates, then the templates were decomposed by calcination and hollow mesoporous silica microspheres come into being. TEM show monodispered...

Uniform hollow nanostructural hollow silica microsphers were produced by the layer-by-layer electrostatic self-assembly technique. The core-shell microspheres were constructed by alternately depositing positive polyelectrolyte PDDAMAC and silica nanoparticles (10nm, 20nm) onto the polystyrene PS microspheres which were used as the colloidal templates, then the templates were decomposed by calcination and hollow mesoporous silica microspheres come into being. TEM show monodispered silica microspheres have spherical void. XRD analyses indicate that crystallization degree of silica is nearly the same after heating treatment, which still maintain an amorphous form. The measurements of N2 adsorption-desorption isotherms yield the surface area of the hollow spheres assembled of silica with a diameter of 10 or 20nm are 282.71m2·g-1 and 158.17m2·g-1, and the average pore diameters of them are 11nm and 15nm respectively. The permeability and sustained release property of hollow silica sphere were also confirmed by the experiments of dye loaded and released.

以单分散聚苯乙烯(PS)微球作为胶体模板,采用层层静电自组装技术,交替组装聚电解质聚二烯丙基二甲基氯化铵[poly(diallyldimethylammonium chloride),PDDA]和二氧化硅纳米颗粒(10和20nm),得到核壳型聚苯乙烯/聚电解质/二氧化硅复合微球,高温煅烧除去模板PS和聚电解质,制得空腔二氧化硅微球.TEM观察的结果显示空腔二氧化硅微球呈单分散性且内部空腔呈球形;XRD图谱显示组装的二氧化硅颗粒热处理后晶化的程度很小,仍基本保持着无定形状态;N2等温吸附-脱附实验测得用10和20nm的二氧化硅组装成的空腔二氧化硅微球的平均孔径和比表面积分别为11nm、282.71m2·g-1和15nm、158.17m2·g-1. 染料的装载和释放实验分别验证了空腔二氧化硅微球的腔壁具有可渗透性和缓释性.

 
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