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首页> 外文学位 >Surlyn/metal oxide nanocomposites: Formation, morphology, and interactions of inorganic and organic phases.
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Surlyn/metal oxide nanocomposites: Formation, morphology, and interactions of inorganic and organic phases.

机译：Surlyn /金属氧化物纳米复合材料：无机相和有机相的形成，形态以及相互作用。

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摘要

The goal of this research was to produce Surlyn® /metal oxide composite materials, examine the morphology of the resulting inorganic phase, and the interactions between the two phases. Effects of counter-ion type and degree of neutralization on inorganic uptake were studied.; The Na+ neutralized materials were found to give the highest and fastest silicate uptakes, while for the titanate materials the un-neutralized materials gave the highest uptakes.; Morphology of the resulting composites was studied using TEM, tapping mode AFM, and ESEM/EDS. Counter-ion type was found to influence the size and distribution of the inorganic phase, which exists as discrete nanosized particles. TEM micrographs and tapping mode AFM phase images of the Surlyn® /silicate composites suggest uniformly spaced non-aggregating particles. The concentration of the inorganic phase is not uniform throughout the composite. Bimodal distributions are found, with high inorganic concentrations near the surfaces of the composite films. Particle number density varies with film depth. More particles are found near the surface regions than at the core of the films. Evidence suggests that particle size distribution varies with counter-ion type. Un-neutralized materials show broader size distributions than the Zn+2 and Na+ neutralized composites. The Na+ neutralized Surlyn®/silicate composites show the smallest particle sizes and narrowest size distribution.; Transmission electron micrographs of the Surlyn®/titanate composites do not show evidence of an inorganic phase. Tapping mode AFM phase images show the presence of discrete nanosized particles. ESEM/EDS experiments find large concentrations of titanium near the surface, and limited incorporation at the center of the films.; EXAFS spectroscopy of Zn+2 neutralized Surlyn® /silicate composites suggests coordination of water at the edges of the ionic aggregates. Infrared spectroscopy finds new peaks due to the inorganic phase. The un-neutralized Surlyn®/silicate composite materials do not show evidence of interactions between the phases. IR spectra of the neutralized Surlyn®/silicate composites show subtle changes in the range from 1500 cm−1 to 1800 cm−1 .; The Surlyn®/titanate ATR-FTIR spectroscopy experiments show changes in the carboxylate and carbonyl stretching regions, indicating a neutralization of carboxylic acid groups with titanium counter-ions.
机译：这项研究的目的是生产Surlyn ® /金属氧化物复合材料，检查所得无机相的形态以及两相之间的相互作用。研究了抗衡离子类型和中和度对无机吸收的影响。发现Na + 中和材料的硅酸盐吸收量最高且最快，而钛酸酯材料中未中和的材料吸收量最高。使用TEM，攻丝模式AFM和ESEM / EDS研究了所得复合材料的形貌。发现抗衡离子类型影响无机相的大小和分布，无机相以离散的纳米尺寸颗粒存在。 Surlyn ® /硅酸盐复合材料的TEM显微照片和振实模式AFM相图显示出均匀分布的非聚集颗粒。整个复合物中无机相的浓度不均匀。发现双峰分布，在复合膜表面附近具有较高的无机浓度。颗粒数密度随膜深而变化。在表面区域附近发现的颗粒多于薄膜的核心。有证据表明粒径分布随抗衡离子类型的不同而不同。未中和的材料比Zn +2 和Na + 中和的复合材料具有更宽的尺寸分布。 Na + 中和的Surlyn ® /硅酸盐复合材料具有最小的粒径和最窄的粒径分布。 Surlyn ®/钛酸酯复合材料的透射电子显微照片没有显示出无机相的迹象。攻丝模式AFM相图像显示存在离散的纳米级颗粒。 ESEM / EDS实验发现在表面附近有大量的钛，并且在薄膜中心的结合有限。 Zn +2 中和的Surlyn ® /硅酸盐复合材料的EXAFS光谱表明，离子聚集体边缘的水具有配位作用。由于无机相，红外光谱法发现了新的峰。未中和的Surlyn ® /硅酸盐复合材料未显示相之间相互作用的迹象。中和的Surlyn ® /硅酸盐复合材料的红外光谱显示，在1500 cm -1 到1800 cm -1 的范围内有细微的变化。 Surlyn ®/钛酸盐ATR-FTIR光谱实验表明，羧酸盐和羰基拉伸区域发生了变化，表明羧酸基团被钛抗衡离子中和。

著录项

  • 作者

    Start, Paul Robert.;

  • 作者单位

    The University of Southern Mississippi.;

  • 授予单位 The University of Southern Mississippi.;
  • 学科 Chemistry Polymer.; Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 227 p.
  • 总页数 227
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化学（高聚物）;工程材料学;
  • 关键词

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