English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 49064/83170 (59%)
造访人次 : 6961877      在线人数 : 44
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/6871


    题名: 精密固液分離在高科技產業之應用-子計畫七:次微米粒子聚集機制與其結構之研究
    其它题名: Study of Flucculation Kinetics and Structure of Sub-Micron Particles
    作者: 吳容銘
    贡献者: 淡江大學化學工程與材料工程學系
    关键词: 聚集體;次微米;光散射;沈降;結構;aggregates;sub-micron;light scattering;settling;structure
    日期: 2004
    上传时间: 2009-03-16 15:22:55 (UTC+8)
    摘要: 許多工業上的固液分離程序涉及次微米粒子之聚集,其中這些膠體系統其穩定性與 粒子表面電荷有關,次微米粒子之聚集可由添加適量的電解質達成,另一個去穩定化的 效果亦可由添加高分子凝聚劑達到,儘管膠體科學已有長足的發展,然而過去多只著重 於膠體粒子聚集機制的研究,對於所聚集形成的聚集體結構卻少有探討。 由於對聚集體結構不完全的瞭解,過去研究多假設它們複雜的結構為均勻的聚集 體,如此簡化的假設自然不符合真正的處理程序。近來探討聚集體結構多使用碎形維度 來衡量其緻密性,常見之方法有光散射、自由沈降及影像處理。本計畫藉由不同的去穩 定方法,例如改變電解質、高分子凝聚劑的濃度,或不同的處理溫度,探討聚集體形成 機制與其結構間之關係,期能對精密固液分離程序之效率有所裨益。 Many industrial solid-liquid separation processes involve aggregates of sub-micron particles. The stability of the colloidal systems is controlled by surface charge on the particles. Aggregation of these sub-micron particles can be achieved by addition of appropriate electrolyte and polymeric flocculant. Despite the long term development of the colloid science, the researchers focus on the kinetic of the aggregation in the past years. But the structure of the aggregates formed was less known. Owing to the non-fully understanding of the aggregates structure, researchers generally assumed the real complex structure of the aggregates to have a homogeneous internal structure. This kind of simplication doesn』t fit to the real conditions. In recent years, fractal dimension is used to describe the structure of the aggregates. Some techniques to measure fraction like light scattering, free settling, and image analysis. This project will discuss the relation between the growing kinetics of the aggregates and its internal structure by chancing the concentration of polymeric flocculant, pH value, temperature etc.
    显示于类别:[化學工程與材料工程學系暨研究所] 研究報告

    文件中的档案:

    档案 描述 大小格式浏览次数
    932214E032006.pdf372KbAdobe PDF401检视/开启

    在機構典藏中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈