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Ionic Conductive Elastomers Based on Soft and Hard Segment Crosslinked Copolymers
- ACTA POLYMERICA SINICA Vol. 54, Issue 9, Pages: 1333-1342(2023)
- 作者机构：
东南大学智能材料研究院/化学化工学院 南京 211189
- 作者简介：
Hong Yang, E-mail:yangh@seu.edu.cn
Quan Li, E-amil:quanli3273@gmail.com
- 基金信息：
DOI：10.11777/j.issn1000-3304.2023.23062
CLC：Published：20 September 2023，
Published Online：18 May 2023，
Received：15 March 2023，
Accepted：12 April 2023
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刘志洋,姜坤,聂振洲等.软硬段交联共聚物基离子导电弹性体[J].高分子学报,2023,54(09):1333-1342.
Liu Zhi-yang,Jiang Kun,Nie Zhen-zhou,et al.Ionic Conductive Elastomers Based on Soft and Hard Segment Crosslinked Copolymers[J].ACTA POLYMERICA SINICA,2023,54(09):1333-1342.
刘志洋,姜坤,聂振洲等.软硬段交联共聚物基离子导电弹性体[J].高分子学报,2023,54(09):1333-1342. DOI： 10.11777/j.issn1000-3304.2023.23062.
Liu Zhi-yang,Jiang Kun,Nie Zhen-zhou,et al.Ionic Conductive Elastomers Based on Soft and Hard Segment Crosslinked Copolymers[J].ACTA POLYMERICA SINICA,2023,54(09):1333-1342. DOI： 10.11777/j.issn1000-3304.2023.23062.
摘要
通过一步点击聚合反应制备了软硬段交联共聚物基锂盐离子导电弹性体，其可作为柔性应变传感器用于监测手指弯曲和摩尔斯电码传输信息. 硬段组分采用液晶基元，使膜在拉伸过程中分子趋于有序排列，增强弹性体的力学性能. 软段组分采用聚乙二醇二甲基丙烯酸酯低聚物(
M
n
= 750 g/mol)，不仅能增加离子导电弹性体的断裂伸长率和透明度，而且所含的醚氧链段能解离锂盐和传输锂离子，提高离子导电弹性体的导电率. 通过优化组分间的比例能得到高应变灵敏度和循环稳定的离子导电弹性体.
Abstract
Flexible sensors can sense external stimuli and convert them into electrical signals that are easy to be analyzed statistically. They have enormous application potential in human motion detection
health monitoring
and human-machine interaction and other fields. It is important to develop flexible sensors with high ductility
transparency
conductivity and stability. Conductive elastomer is the key core material of flexible sensor. At present
transparent flexible sensors mainly use ionic conductive materials
including hydrogels
organic gels
ionic gels and ionic conductive elastomers. Ionic conductive elastomers are composed of ionic conductors and elastic polymer networks
which have conductive mechanism similar to skin
wide operating temperature range
high transparency and excellent reversible tensile-shrinkage performance
which are suitable to be used as transparent flexible sensors for human-machine interaction. In this work
the soft-hard crosslinked copolymer-based lithium ionic conductive elastomers were prepared
via
a one-step click polymerization reaction
and used as the flexible strain sensors for monitoring finger bending and Morse Code transmission information. The hard segment component consists of liquid crystal molecules
which tend to orderly arrange during the membrane stretching process
and enhance the mechanical properties of the elastomer. The soft segment is composed of polyethylene glycol dimethacrylate oligomer (
M
n
= 750 g/mol)
which can not only increase the breaking elongation and transparency of ionic conductive elastomers
but also the ether oxygen segment contained can dissociate and transport lithium ions
and improve the conductivity of ionic conductive elastomers. By optimizing the proportion of components
ion conductive elastomers with different mechanical properties
transparencies
and conductivities can be obtained. The maximum elongation at break is 1280%
the maximum fracture stress is 5.08 MPa
the maximum modulus is 17.21 MPa
the transmittance is over 80%
and the maximum conductivity is 2.5 mS/cm. The ionic conductive elastomers with the best comprehensive properties possess high strain sensitivity with corresponding gauge factor values of 2.89
4.61
and 5.39 in the strain range of 0‒200%
200%‒350%
and 350%‒550%
respectively. This one-step soft-hard segment crosslinked copolymer strategy provides a new idea for preparing high-performance transparent ionic conductive elastomers.
关键词
共聚物离子导电弹性体液晶柔性传感
Keywords
CopolymerIonic conductive elastomerLiquid crystalFlexibilitySensor
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