导电高分子复合材料电性能的形变敏感度在加工中的调控

Strain sensitive conductive polymer composites (CPCs) based on thermoplastic elastomer have attracted tremendous amount of attention lately due to their easy fabrication method and wide range of applications. But the effective control of strain sensitivity through processing still remains as a hurdle in this field, furthermore, the mechanism governing strain sensitivity is still unclear. In order to achieve tunable strain sensitivity in these CPCs, current project will investigate the effect of processing on the morphology of conductive networks and their interface with elastomer, study the relationship between different processing methods with these two issues, and further reveal the scientific mechanism behind this. Furthermore, current project also aims to fabricate high performance flexible conductor, which can maintain its high conductivity under relative large strain. It will be realized through morphological control and investigation on the relationship between the performance of flexible conductor and its conductive network structure. To provide a novel route for the fabrication of controllable strain sensitivity CPCs and flexible conductor, investigation will be carried out to study the relationship between the structure of conductive network and its interface with elastomer matrix, with strain sensitivity. Efforts will be made to understand the key issue governing the strain sensitivity of CPCs. This project could provide materials for the fabrication of intelligent sensors and flexible electronics. The success of current project could be accompanied with huge social and economic benefits.

基于热塑性弹性体的形变敏感导电高分子材料由于其简单的加工方法和广泛的应用前景近来备受关注。但通过简单加工方法有效调控形变敏感度一直是这个领域的一个难点，影响材料形变敏感度的关键因素也没有定论。本项目为制备具有可调控形变敏感度的导电材料，将分类和优选调控导电网络结构及其与弹性体界面作用的加工方法，分析不同加工因素与这两者间的关系，进而研究影响这些关系的科学机理。此外，本项目还将通过对导电网络结构及性能的调控，分析弹性导体性能与导电网络结构的关系及机理，制备在高形变下保持高电导率的柔性导体材料。并深入研究导电网络结构、性能及其与弹性体界面与形变敏感度的关系，探讨调控导电材料形变敏感度的关键因素。为制备可调形变敏感度和柔性导体材料提供新思路。这将为制备各种智能传感器及柔性电子设备提供材料，具有巨大的社会效益和经济效益。

本项目利用各类简易高效的加工方法：共混物、混合填料及往复拉伸，调控导电高分子复合材料中的填料网络结构，实现材料电性能形变敏感行为的可调控；发现形变敏感行为稳定性与其网络结构及制备方法息息相关。提出填料网络结构与界面作用力为影响材料电性能形变敏感行为的关键因素。为各类功能高分子复合材料内填料网络的调控、高性能形变敏感传感器及弹性导体的制备提供了理论指导。项目在执行期间在包括Progress in Polymer Science, Small, Journal of Materials Chemistry A, ACS Applied Materials & Interfaces 等杂志共发表10篇SCI文章。申请国家发明专利2项，已授权1项。项目负责人入选教育部“新世纪人才计划”、获四川省杰青，获四川省科技进步一等奖（第三），入选四川省学术和技术带头人后备人选。该项目所发现并提倡的利用加工中形态调控及界面作用力制备具备不同形变敏感性导电高分子复合材料的方法获得诸多好评和认同：意大利Elisa Passaglia博士 认为该方法是简单，但有效的...“This simple but effective method...’。印度 Sunil. K. Narayanankutty教授认为该方法为制备高性能形变敏感器提供了指导方针。“...provided a guideline for...”。澳大利亚Fugen Daver教授认为：该方法是一种具有创新性的方法...,“offers an innovative method...”。