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首页> 外文会议>TAPPI International Conference on Nanotechnology 2006 >Understanding nanoparticle/microparticle performance through visualization of conformational changes of a retention aid at the nanoscale level
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Understanding nanoparticle/microparticle performance through visualization of conformational changes of a retention aid at the nanoscale level

机译：通过可视化保留助剂在纳米级的构象变化来了解纳米/微粒的性能

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A novel transmission electron microscopy technique for the visualization of polymers adsorbed on secondary fines has been developed. The technique has been employed to observe the effects of various microparticles on the adsorption behavior and conformational characteristics of C-PAM. The mechanism responsible for improved drainage and retention following micropatticle addition will be discussed. Introduction The use of microparticles as components in drainage and retention aid programs is the most successful and widely applied example of nanotechnology in papermaking. The incorporation of microparticles in drainage and retention programs can improve drainage rates and fines retention while maintaining or improving the quality of sheet formation. This translates to significant reductions in production costs in terms of drying energy, raw materials expenses, and improved production rates. Researchers have linked these effects to an increased shear resistance and density of the flocs, a decrease in the floc size, and the reversibility of microparticle-augmented flocs . A novel transmission electron microscopy technique, developed by Hiroki Nanko at the Institute of Paper Science and Technology, allows the simultaneous observation of adsorbed polymer and substrate (cellulose fibrils) at the nanoscale level. To further our understanding of the mechanisms of microparticles, this technique was applied to observe the effects of various microparticle samples (silica, bentonite, hectorite, and polymeric microparticles) on the conformational characteristics of cationic polyacrylamide. Each of the microparticle samples used in the project was found to cause the same general changes in linear cationic polyacrylamide conformation. This paper will focus on silica microparticles.
机译：已经开发了一种新颖的透射电子显微镜技术，用于可视化吸附在次级细粉上的聚合物。该技术已被用来观察各种微粒对C-PAM的吸附行为和构象特征的影响。将讨论增加微粒后引流和滞留改善的机理。引言在排水和助留剂计划中使用微粒作为组分是纳米技术在造纸中最成功和广泛应用的例子。将微粒结合到排水和保留程序中可以提高排水速率并细化保留，同时保持或改善纸页的形成质量。这转化为干燥能源，原材料费用和生产率提高方面的生产成本的显着降低。研究人员将这些影响与絮凝物的抗剪切力和密度增加，絮凝物尺寸减小以及微粒增强絮凝物的可逆性联系起来。纸张科学技术研究所的Hiroki Nanko开发了一种新颖的透射电子显微镜技术，可以同时观察纳米级吸附的聚合物和基质（纤维素纤维）。为了进一步了解微粒的机理，将该技术用于观察各种微粒样品（二氧化硅，膨润土，锂蒙脱石和聚合物微粒）对阳离子聚丙烯酰胺构象特性的影响。发现该项目中使用的每个微粒样品都会导致线性阳离子聚丙烯酰胺构象发生相同的一般变化。本文将重点介绍二氧化硅微粒。

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