以紫外光固化双亲共聚物为功能性软模板聚合水溶性PEDOT导电材料的研究

Functional UV-curable materials have been developed rapidly in the world for their fast curing speed, low VOC emissions and excellent material properties. Especially, the development of UV-curable conductive material is very important in the information age. The intrinsic conductive polymer named poly(3, 4-ethylenedioxythiophene) (PEDOT) with good conductivity, stability and transparency is used in this application, as well as radical/ATRP polymerization, soft template polymerization, UV curing and inkjet printing technology. They are used to explore the effects of controlled designation of UV-curable amphophilic copolymers to the polymerization mechanism of soft template polymerization for water-soluble PEDOT and develop new approaches for soft template polymerization of PEDOT. They are also used to grasp the influence laws of copolymer types and proportion of hydrophilic/hydrophobic segments to polymerization process, water-soluble property, particle sizes and microstructure, study the influence of soft template polymerization conditions and amount of soft template addition to the solid content of PEDOT suspension, the stable ability and conductive properties, explore the influence of photosensitive groups to heat resistance and water resistance of the PEDOT conductive material, find the optimal polymer structure, the proportion of hydrophilic/hydrophobic segments, the pohtosensitive group content and the polymerization conditions, improve the whole performance of the UV-curable PEDOT conductive material，and expand the new applications of UV-curable water-soluble PEDOT conductive materials in the field for inkjet printing of electronic devices.

功能性紫外光固化材料以其固化速度快、VOC 排放量低、材料性能优异等优势在世界范围内得到迅速发展，其中紫外光固化导电材料的研发在信息时代显得尤为重要。本申请采用聚3,4-乙撑二氧噻吩(PEDOT)本征型导电聚合物，拟融合自由基/ATRP聚合、软模板聚合法、紫外光固化及喷墨打印等技术，探索紫外光固化型双亲共聚物的可控设计对软模板聚合水溶性PEDOT导电材料的影响机理，发展软模板聚合PEDOT的新途径。掌握双亲共聚物的共聚类型、亲疏水链段比例对水溶性PEDOT水溶性、粒径及微观形貌的影响规律；研究软模板法聚合条件及软模板加入量对PEDOT稳定能力及导电性能的影响；探索光敏性基团对PEDOT导电材料耐热性及耐水性的影响；找出最优共聚物结构、比例、光敏基团含量及聚合条件，实现PEDOT光固化导电材料综合性能的提高，拓展紫外光固化水溶性PEDOT导电材料在喷墨打印电子器件领域的新应用。

当今电子信息时代，紫外光固化导电材料的研发显得尤为重要。而本征型导电聚合物材料由于成本较低，聚合物相容性较好，成为紫外光固化导电材料的首选。更值得关注的是，本征型导电聚合物类材料的分子设计空间大，最有可能制备成溶液态作为喷墨打印导电油墨，用于近年来发展迅速且应用广泛的喷墨打印技术，使其更加高效、节能、环保和实用。因此，开发适合喷墨打印的本征型紫外光固化导电材料具有重大的科研和现实意义。本项目制备了无规双亲共聚物PSAG和交替双亲共聚物PVMA，将它们作为软模板合成了分散良好的PEDOT水分散液。随后将PEDOT水分散液加入某些有机溶剂，用以调节其表面张力和粘度等参数，调制成PEDOT基导电墨水，进行喷墨打印制备电极，两者均获得了导电性能较好、柔韧性较好的柔性电极。其中，PEDOT：PVMA基墨水粒径控制较好，打印出的纸基电极有良好的湿气传感性能。传感器的响应范围较宽（11%~98% RH），湿敏传感响应/回复循环非常的稳定，经历100次循环，电阻响应都能维持在同一平台上。且溶剂大部分为水，绿色环保；采用相纸作为基材，成本低廉，为工业化生产提供了可能性。