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：
BEN XU
金额：
$ 12.46万
依托单位：
Northumbria University
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：
https://gtr.ukri.org/projects?ref=EP%2FN007921%2F1
关键词：
Stimuli responsive gel based microfluidic

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.

弹性不稳定性，例如表面的屈曲，皱纹和折痕以及捕捉过渡，历史上代表了薄膜中的机械故障。但是，这种情况不一定是这种情况，弹性不稳定性，尤其是在软聚合物表面上，可以响应定义明确的信号或环境变化而提供可逆的控制，感应或启动。在以前的工作中，我已经表明，表面不稳定性可以在由专门设计的基础电极支持的凝胶表面上进行电触发。所证明的致动要求低电压为2-4 V.（AdvMater。Vol。2013，2013年），并且在响应时间小于1秒的时间内也获得了快速的致动。该项目将上述见解与我在表面不稳定性（机械）和材料科学方面的既定理解和经验一起产生强大的电压控制开关，以调节微通道中的液体流量。实际上，该项目将集中于理解基于水凝胶的微型系统，该系统将允许定量确定以下几个系统：i）屈曲发生的条件以及屈曲的发作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； ii）屈曲的形态与软表面的材料特性，驱动之前的初始肿胀状态以及电极几何形状之间的关系； 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，将开发基于响应凝胶的开关，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，材料科学和微型工程。从印刷产生的结构电极到凝胶化学，将使用一系列材料创新。该项目中描述的具有“按需”致动的被动阀技术位于广泛的科学环境（化学，应用物理学，化学物理学，微型工程，化学工程和电化学）。该项目将提供所需的理解，以允许将来开发具有高整合性和液体自动化的新型微富集设备。

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：
ADVANCED COMPOSITES AND HYBRID MATERIALS
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：
International Communications in Heat and Mass Transfer
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：
ACS APPLIED POLYMER MATERIALS
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：
Materials Today Physics
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

Hydrogel Bioadhesives with Extreme Acid-Tolerance for Gastric Perforation Repairing