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相关概念视频

Step-Growth Polymerization: Overview01:03

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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
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Preparation of Light-responsive Membranes by a Combined Surface Grafting and Postmodification Process
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在聚合物表面上进行多梯度湿度修改的一步过程.

Xinxin Li1, Xinyu Mao1, Xudong Li1

  • 1Department of Mechanical Engineering, Dalian University of Technology, Dalian, Liaoning, China. chongl@dlut.edu.cn.

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概括
此摘要是机器生成的。

控制梯度氧等离子体修饰 (CGPM) 能够在聚二甲基素 (PDMS) 微流体装置上选择性地改变表面湿度. 这种技术提高了D-二次元检测的灵敏度和速度.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 表面化学 表面化学
  • 微流体学 微流体学

背景情况:

  • 聚二甲基素) (PDMS) 微流体装置需要表面修改,以调节可湿性和流量控制.
  • 现有的PDMS表面修改方法仅限于一次改变单个区域.

研究的目的:

  • 引入一种新的控制梯度氧等离子体修饰 (CGPM) 技术,用于在PDMS表面上创建空间控制的湿度梯度.
  • 调查面具特性对CGPM有效性的影响.
  • 展示CGPM在一个集成的微流体装置中的应用,用于增强D-二次元检测.

主要方法:

  • 通过在PDMS表面上叠加多孔树脂面膜来控制氧气等离子体密度,开发了CGPM.
  • 利用COMSOL等离子模块的模拟来分析面具多孔度,孔径,分布和距离对可湿度的影响.
  • 通过接触角度测量来描述CGPM的性能.
  • 将CGPM技术集成到用于D-二次元识别的微流体装置中.

主要成果:

  • 在25秒内,CGPM实现了PDMS表面接触角度的连续变化,从8.77°变为76.98°.
  • 模拟提供了关于优化口罩参数以精确控制湿度的见解.
  • 集成器件中的D-二元测定在10分钟内完成,显示动态范围为1-1000 ng mL-1.1.
  • 与标准治疗相比,观察到D-二次体检测光信号的峰值为78.3%,平均增加31.1%.

结论:

  • CGPM提供了一种多功能和高效的方法,用于在PDMS表面上创建可调节的湿度梯度.
  • 该技术显著提高了微流体检测的性能,通过增强的D-二分体检测证明了这一点.
  • CGPM有望在诊断领域及其他领域推进微流体设备应用.