具有较高回弹性的乙烯-辛烯共聚物基微孔复合材料的传感性能

田信龙; 黄汉雄

doi:10.11777/j.issn1000-3304.2022.22224

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具有较高回弹性的乙烯-辛烯共聚物基微孔复合材料的传感性能

研究论文 | 更新时间：2023-05-22

- 具有较高回弹性的乙烯-辛烯共聚物基微孔复合材料的传感性能
- Sensing Performance of POE-based Microcellular Composites with Higher Resilience
- 高分子学报 2023年54卷第2期页码：235-244
- 作者机构：
  
  华南理工大学广东省高分子先进制造技术及装备重点实验室微/纳成型与流变学研究室广州 510640
- 作者简介：
  
  E-mail: mmhuang@scut.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 52073096)
- DOI：10.11777/j.issn1000-3304.2022.22224
  中图分类号：
- 纸质出版日期：2023-02-20，
  
  网络出版日期：2022-09-21，
  
  收稿日期：2022-06-05，
  
  录用日期：2022-07-29
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田信龙,黄汉雄.具有较高回弹性的乙烯-辛烯共聚物基微孔复合材料的传感性能[J].高分子学报,2023,54(02):235-244.

Tian Xin-long,Huang Han-xiong.Sensing Performance of POE-based Microcellular Composites with Higher Resilience[J].ACTA POLYMERICA SINICA,2023,54(02):235-244.
田信龙,黄汉雄.具有较高回弹性的乙烯-辛烯共聚物基微孔复合材料的传感性能[J].高分子学报,2023,54(02):235-244. DOI： 10.11777/j.issn1000-3304.2022.22224.

Tian Xin-long,Huang Han-xiong.Sensing Performance of POE-based Microcellular Composites with Higher Resilience[J].ACTA POLYMERICA SINICA,2023,54(02):235-244. DOI： 10.11777/j.issn1000-3304.2022.22224.

摘要

通过熔体混炼制备乙烯-辛烯共聚物/多壁碳纳米管/碳纤(POE/MWCNTs/CF，90/5/5，

W/W/W

)复合材料，采用超临界二氧化碳发泡法对其进行釜压发泡，分析3种发泡温度(55、60和65 ℃)下制备的微孔样品的泡孔结构，着重研究其对微孔样品压缩性能和传感器压阻响应(灵敏度和线性响应范围等)的影响. 结果表明，55 ℃下制备的微孔样品呈现较均匀的泡孔结构、较窄的泡孔直径分布(主要在10~30 μm范围内)和厚度适中、连续性高的泡孔壁，这使其具有较高的回弹性、压缩强度、压缩模量和电导率. 采用这种微孔圆片封装成的传感器具有较宽的线性响应范围(0~30%压缩应变)和较高的灵敏度(应变因子为1.67)，根据泡孔结构对此进行了分析. 该传感器具有较快速的压阻响应和恢复性能以及良好的重复性，在1000次循环压缩/释放测试中表现出较高的稳定性和耐久性，且能检测手指按压、肘部弯曲、深蹲和脚踩等人体运动(对应较宽的压缩应变范围). 研究表明，采用超临界流体发泡法制备泡孔结构较均匀、泡孔壁厚度适中且连续的微孔导电复合材料具有良好的传感性能.

Abstract

Poly(ethylene-

-octene)/multi-walled carbon nanotubes/carbon fibre (POE/MWCNTs/CF

90:5:5

W/W/W

) composites were prepared by melt-mixing

and the composites were then foamed in a batch process using supercritical carbon dioxide foaming method. The cell structure was analyzed for the microcellular samples prepared at foaming temperatures of 55

60 and 65 ℃

and its effect was emphasized on the compression properties of the microcellular samples and the piezoresistive response (sensitivity and linear response range) of the assembled sensors. It was demonstrated that the microcellular sample foamed at 55 ℃ exhibited a relatively uniform cell structure

a narrower cell diameter distribution (mainly in the range of 10‒30 μm)

and moderately thick and highly continuous cell walls

which endowed the microcellular sample with higher resilience

compression strength

compression modulus and electrical conductivity. The sensor assembled with this microcellular disk had a wider linear response range (0‒30% compression strain) and higher sensitivity (strain factor of 1.67)

which were analyzed based on the cell structure. The sensor exhibited faster piezoresistive response and recovery performance and good repeatability

and showed higher stability and durability in the 1000 cycles of cyclic compression/release test with 30% strain. Moreover

the sensor could monitor typical human motions

such as finger pressing

elbow bending

squatting

and foot stepping

which corresponded to a wider compressive strain range . The results demonstrate that the microcellular conductive composites with more uniform cell structure and moderately thick and highly continuous cell walls foamed by supercritical fluid foaming method have good sensing performance.

关键词

乙烯-辛烯共聚物/多壁碳纳米管/碳纤复合材料超临界二氧化碳发泡微孔结构回弹性传感性能

Keywords

Poly(ethylene-co-octene)/multi-walled carbon nanotubes/carbon fibre compositeSupercritical carbon dioxide foamingMicrocellular structureResilienceSensing performance

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