导电高分子材料聚(3,4-乙烯二氧噻吩):聚苯乙烯磺酸盐（PEDOT:PSS）在可穿戴电子设备等柔性电子领域具有广阔应用前景。PEDOT:PSS在可见光范围内具有较高的透光率，具有良好的溶液加工性能以及良好的机械稳定性，但原始PEDOT:PSS中绝缘PSS组分的存在导致薄膜的电导率较低。由于刚性PEDOT共轭骨架和链间相互作用的限制，拉伸过程中产生的裂纹可能会破坏电荷传输通路，原始PEDOT:PSS薄膜的拉伸性能有限。在本文中，我们采用甘油和聚乙烯醇作为添加剂，构建双网络结构协同增强PEDOT:PSS薄膜的电导率与拉伸性。通过柔性聚合物PVA构成可拉伸网络，有效改善薄膜拉伸性能，进一步通过甘油羟基与PEDOT链产生偶极相互作用，改变PEDOT分子链构象并提升分子链平面性，同时，极性甘油诱导PEDOT与PSS发生相分离，促使PEDOT区域聚集形成导电通路，提高薄膜的电导率。通过优化甘油与PVA的配比，可获得断裂伸长率超过100%、电导率达660 S/cm的可拉伸导电薄膜。

Conductive polymer PEDOT:PSS has a wide application prospect in flexible electronic products such as wearable electronic and other fields. PEDOT:PSS has high transmittance in the visible light range, great solution processing performance and good mechanical stability. However, the conductivity and stretchability of the original PEDOT:PSS film are limited due to the fact that the conductive PEDOT is wrapped by insulating PSS and has a rigid conjugated backbone and strong interchain interaction. In order to improve the conductivity of the blended film, we use glycerin and polyvinyl alcohol as additives, and the PEDOT molecular chain conformation is changed and PEDOT:PSS phase separation is induced by the interaction between polar glycerin and PEDOT. At the same time, soft polymer PVA serves as a stretchable network, improving the stretchability of the film. Typically, the original PEDOT:PSS films are poorly stretchable, so PVA is used as a stretchable polymer network. However, because PVA is an insulating material, the conductivity of the film is extremely low. In order to improve the conductivity of the blended film, glycerin is further blended with PVA/PEDOT:PSS. Dipole interaction occur between glycerin hydroxyl group and PEDOT chain, which change the conformation of the PEDOT molecular chain and improve the planarity of the molecular chain. Meanwhile, polar glycerin induces phase separation between PEDOT and PSS, causing PEDOT regions to aggregate and form conductive pathways. Moreover, glycerin can form hydrogen bonds with PSS and PVA, reducing the interaction between polymer chains and further improving stretchability. The results show that by optimizing the content of glycerin and PVA, a stretchable conductive film with more than 100% elongation at break and 660 S/cm conductivity can be obtained.