Development of Highly Precise Controlling Methods for Polymer Microspher by Taking Advantage of Nonlinear Dynamics

利用非线性动力学开发聚合物微球高精度控制方法

基本信息

  • 批准号:
    13555207
  • 负责人:
  • 金额:
    $ 8.32万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2001
  • 资助国家:
    日本
  • 起止时间:
    2001 至 2003
  • 项目状态:
    已结题

项目摘要

This research attempted to take advantage of the nonlinear dynamics in continuous emulsion polymerization processes in order to control latex particle size distribution. When the emulsion polymerization of vinyl acetate was conducted in a CSTR under conditions below the critical micelle concentration of the emulsifier, the monomer conversion attained in a time-independent steady-state operation showed a drastic rise from 0 to over 60% at a critical reaction temperature or mean residence time. The mean residence time or the reaction temperature was switched alternately between two values in the non-steady-state operation, one giving zero monomer conversion and the other a high monomer conversion in the usual steady-state operation. The periodic-switching operation induced oscillations in monomer conversion in time. The particle size distribution varied synchronously with the switching operation. This research showed the possibility of controlling the particle size distribution by adjust … More ing the frequency and/or the amplitude of the temporal variation of the mean residence time or reaction temperature. This research found that even while the constant monomer conversion was maintained at the steady state, the particle size distribution oscillated with a very large time period. This research revealed that the oscillations occur by a competitive interaction between polymerization reaction and aggregation of latex particles. In order to vary the colloidal stability of latex particles, a nonionic surfactant was added in some cases. It was found that using a mixture of a nonionic surfactant and an anionic surfactant was very effective for suppressing the oscillations. In order to take advantage of the oscillations of particle size, emulsion polymerization of vinyl acetate was performed in a system of two continuous stirred tank reactors in series. The oscillatory behavior could be controlled by varying the rotational speed of the impeller and the mean residence time. The research using two CSTR in series indicated the possibility of producing various poly-dispersed latex particles. Less
本研究试图利用连续乳液聚合过程中的非线性动力学来控制乳胶粒径分布。当乙酸乙烯酯的乳液聚合在低于乳化剂临界胶束浓度的条件下在 CSTR 中进行时,在与时间无关的稳态操作中获得的单体转化率在临界反应温度或平均停留时间下从 0 急剧上升到 60% 以上。在非稳态操作中,平均停留时间或反应温度在两个值之间交替切换,一个在通常的稳态操作中提供零单体转化率,而另一个在通常的稳态操作中提供高单体转化率。周期性开关操作引起单体转化随时间的振荡。粒度分布与切换操作同步变化。这项研究表明可以通过调整平均停留时间或反应温度的时间变化的频率和/或幅度来控制粒度分布。这项研究发现,即使在稳定状态下保持恒定的单体转化率,粒度分布也会在很长的时间内振荡。这项研究表明,振荡是由聚合反应和乳胶颗粒聚集之间的竞争相互作用而发生的。为了改变胶乳颗粒的胶体稳定性,有时添加非离子表面活性剂。发现使用非离子表面活性剂和阴离子表面活性剂的混合物对于抑制振荡非常有效。为了利用粒径的振荡,乙酸乙烯酯的乳液聚合在两个串联的连续搅拌釜反应器的系统中进行。振荡行为可以通过改变叶轮的转速和平均停留时间来控制。使用两个CSTR串联的研究表明了生产各种多分散乳胶颗粒的可能性。较少的

项目成果

期刊论文数量(66)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
N.Ohmura: "Novel Operating Method for Controlling Latex Particles Size Distribution in Emulsion Polymerization of Vinyl Acetate"Industrial & Engineering Chemistry Research. 40-23. 5177-5183 (2001)
N.Ohmura:“醋酸乙烯乳液聚合中控制乳胶粒径分布的新操作方法”工业
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  • 影响因子:
    0
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N.Ohmura: "Self-Sustained Oscillation of PSD of Latex Particles in Continuous Emulsion Polymerization"Proc.9th APCChE Congress and CHEMECA 2002. (CD-ROM). 1-8 (2002)
N.Ohmura:“连续乳液聚合中乳胶颗粒 PSD 的自持续振荡”Proc.9th APCChE 大会和 CHEMECA 2002。(CD-ROM)。
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    0
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K.Kataoka: "Self-sustained Oscillation of Particle Size Distribution in Continuous Emulsion Polymerization"Proceedings of 15^<th> International Congress of Chemical and Process Engineering, Praha, Czech. A5-2-38(CD-ROM). (2002)
K.Kataoka:“连续乳液聚合中粒度分布的自持振荡”第 15 届国际化学与过程工程大会论文集,捷克布拉格。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
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K.Kataoka: "Effect of Nonlinear Coupling between Transport and Reaction Dynamics in Polymerization Processes"Proceedings of 13^<th> International Symposium on Transport Phenomena, Canada. 491-496 (2002)
K.Kataoka:“聚合过程中传递和反应动力学之间的非线性耦合的影响”第13届国际传递现象研讨会论文集,加拿大。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
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N.Ohmura: "Effect of Inhomogeneous Mixing on Chemical Reaction in a Taylor Vortex Flow Reactor"Journal of Chemical Engineering of Japan. Vol.35・No.7. 692-695 (2002)
N.Ohmura:“泰勒涡流反应器中的不均匀混合对化学反应的影响”日本化学工程学报第35卷·第7期(2002年)。
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    0
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OHMURA Naoto其他文献

OHMURA Naoto的其他文献

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{{ truncateString('OHMURA Naoto', 18)}}的其他基金

A challenge for creation of energy-saving and low-carbonized local community based on food culture
以饮食文化为基础,打造节能低碳的当地社区的挑战
  • 批准号:
    25560155
  • 财政年份:
    2013
  • 资助金额:
    $ 8.32万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Elucidation of anomalous transport phenomena and its application to process intensification
异常输运现象的阐明及其在过程强化中的应用
  • 批准号:
    23656492
  • 财政年份:
    2011
  • 资助金额:
    $ 8.32万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Constitution of Methodology of Dynamical Network for Process Intensification
过程强化动态网络方法论的构建
  • 批准号:
    20246115
  • 财政年份:
    2008
  • 资助金额:
    $ 8.32万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Establishment of a Method for Precisely Controlling Mixing/Reaction in Stirred Vessels Utilizing Dynamic Changes of Flow Patterns
建立利用流型动态变化精确控制搅拌容器中混合/反应的方法
  • 批准号:
    16560656
  • 财政年份:
    2004
  • 资助金额:
    $ 8.32万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of Reactors and Dialysis Devices without Damaging Fragile Emulsion
不破坏易碎乳液的反应器和透析装置的开发
  • 批准号:
    14350410
  • 财政年份:
    2002
  • 资助金额:
    $ 8.32万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)

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    2024
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    2237715
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BRITE 重新启动:通过推进非线性动力学的可解释机器学习来改善结构健康
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    2227495
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    2023
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Nonlinear Dynamics of Auditory Hair Cells and Efferent Neurons
听觉毛细胞和传出神经元的非线性动力学
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    2210316
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非线性动力学和大气
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Nonlinear dynamics of shell and plate structures, multi-dimensional and multi-field applications
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使用算子理论分析来分析和控制量子非线性动力学
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