Stimuli-responsive gel based microfluidic switch
基于刺激响应凝胶的微流控开关
基本信息
- 批准号:EP/N007921/1
- 负责人:
- 金额:$ 12.46万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2016
- 资助国家:英国
- 起止时间:2016 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Elastic instabilities such as buckling, wrinkling and creasing of surfaces, and snapping transitions have historically represented mechanical failure in thin films. However, this does not have to be the case and elastic instabilities, particularly on soft polymer surfaces, can provide reversible control, sensing or actuation in response to well-defined signals or changes in their environment. In previous work, I have shown that surface instabilities can be electrically triggered on a gel surface supported by specifically designed underlying electrodes. The demonstrated actuation required a low voltage of 2 - 4 V. (Adv Mater. Vol 25, 2013) and a rapid actuation was also obtained with response times less than 1 second. This project uses the above insights together with my established understanding and experience in surface instability (mechanics) and materials science to produce a robust electric voltage controlled switch to regulate the liquid flow in a micro-channel. Practically, the project will focus on understanding a hydrogel based micro-system that will allow quantitative determination of the following: i) the conditions under which buckling occurs and how the onset of buckling depends on the materials properties of the soft surface, the environmental parameters (Ionic values, temperature, pH values) and the electrode geometries; ii) how the morphology of buckling relates to the materials properties of the soft surface, the initial swelling state prior to the actuation, and the electrode geometries; iii) how to trim the buckled shape of the gel layer to effectively control the fluid flow in a micro-environment. Using the understanding from these experiments, a responsive gel based switch will be developed to dynamically regulate the liquid flow in a micro-channel. The work of this project is cross disciplinary and includes mechanics, materials science and micro-engineering. A range of materials innovations will be used from lithographically produced structural electrodes to gel chemistry. The passive valve technology with an 'on-demand' actuation described in this project is situated in a broad scientific context (chemistry, applied physics, chemical-physics, micro-engineering, chemical engineering, and electro-chemistry). The project will provide the understanding needed to allow future development of novel micro-fluidic devices with high integratibility and automation of liquid flow.
表面屈曲、起皱和折痕以及突然过渡等弹性不稳定性历来代表薄膜中的机械故障。然而,情况并不一定如此,弹性不稳定性,特别是在软聚合物表面上,可以提供可逆的控制、传感或驱动,以响应明确的信号或环境的变化。在之前的工作中,我已经证明,表面不稳定性可以在由专门设计的底层电极支持的凝胶表面上电触发。所演示的驱动需要 2 - 4 V 的低电压。(Adv Mater. Vol 25, 2013)并且还获得了响应时间小于 1 秒的快速驱动。该项目利用上述见解以及我在表面不稳定性(力学)和材料科学方面的既定理解和经验,生产出强大的电压控制开关来调节微通道中的液体流动。 实际上,该项目将重点了解基于水凝胶的微系统,该系统将允许定量确定以下内容:i)屈曲发生的条件以及屈曲的发生如何取决于软表面的材料特性、环境参数(离子值、温度、pH 值)和电极几何形状; ii) 屈曲形态与软表面的材料特性、驱动前的初始膨胀状态以及电极几何形状有何关系; iii) 如何修剪凝胶层的屈曲形状以有效控制微环境中的流体流动。利用这些实验的理解,将开发出一种基于凝胶的响应式开关,以动态调节微通道中的液体流量。 该项目的工作是跨学科的,包括力学、材料科学和微工程。将使用从光刻生产的结构电极到凝胶化学的一系列材料创新。该项目中描述的具有“按需”驱动的被动阀门技术具有广泛的科学背景(化学、应用物理、化学物理、微工程、化学工程和电化学)。该项目将为未来开发具有高度集成性和液体流动自动化的新型微流体装置提供所需的理解。
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Enhanced electromagnetic wave absorption of engineered epoxy nanocomposites with the assistance of polyaniline fillers
- DOI:10.1007/s42114-022-00417-2
- 发表时间:2022-01-12
- 期刊:
- 影响因子:20.1
- 作者:Guo, Jiang;Chen, Zhuoran;Guo, Zhanhu
- 通讯作者:Guo, Zhanhu
Optimizing the energy recovery section in thermal desalination systems for improved thermodynamic, economic, and environmental performance
- DOI:10.1016/j.icheatmasstransfer.2021.105244
- 发表时间:2021-05
- 期刊:
- 影响因子:7
- 作者:M. Jamil;Talha S. Goraya;K. Ng;S. Zubair;B. Xu;M. Shahzad
- 通讯作者:M. Jamil;Talha S. Goraya;K. Ng;S. Zubair;B. Xu;M. Shahzad
Stretchable Self-Healing Polymeric Networks with Recyclability and Dual Responsiveness
- DOI:10.1021/acsapm.9b01073
- 发表时间:2020-03-01
- 期刊:
- 影响因子:5
- 作者:Dai, Xingyi;Du, Yuzhang;Kong, Jie
- 通讯作者:Kong, Jie
Progress of metal organic frameworks-based composites in electromagnetic wave absorption
- DOI:10.1016/j.mtphys.2022.100950
- 发表时间:2022-12
- 期刊:
- 影响因子:11.5
- 作者:Shixuan Feng;Futian Zhai;H. Su;D. Sridhar;Hassan Algadi;B. Xu;R. Pashameah;Eman Alzahrani
- 通讯作者:Shixuan Feng;Futian Zhai;H. Su;D. Sridhar;Hassan Algadi;B. Xu;R. Pashameah;Eman Alzahrani
Recoverable and self-healing electromagnetic wave absorbing nanocomposites
可恢复和自修复的电磁波吸收纳米复合材料
- DOI:10.1016/j.compscitech.2019.02.018
- 发表时间:2019-04-12
- 期刊:
- 影响因子:9.1
- 作者:Dai, Xingyi;Du, Yuzhang;Kong, Jie
- 通讯作者:Kong, Jie
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