Biobased polymers have received extensive research attention in flexible and renewable electronics to meet the concept of environmental sustainability. In this study, we develop a series of new polyimides (PIs) from biosources to serve as the substrate and dielectrics for a flexible organic field-effect transistor (OFET). The bioderived diamine, (3R,6S)-hexahydrofuro[3,2-b]furan-3,6-diyl bis(4-aminobenzoate) (ISBA), synthesized from isosorbide (ISB), was reacted with three dianhydrides of pyromellitic dianhydride (PMDA), 3,3′,4,4′-biphenyl-tetracarboxylic dianhydride (BPDA), and cyclobutane-1,2,3,4-tetracarboxylic dianhydride (CBDA) to obtain PIs and copolyimides (Co-PIs) with a high biomass content up to 53%. These bioderived PIs possessed high T_d’s over 400 °C and T_g’s over 250 °C. Furthermore, the CBDA-based and PMDA-based PIs exhibited CTE values below 50 ppm K^–1 due to the rigid heterocyclic ISB unit and the structural linearity of the CBDA and PMDA moieties in the polymer backbone. High transparency and low coloration were also observed in the biobased PIs. Finally, highly thermal-resistant PI(ISBA-C95B5) consisting of the CBDA/BPDA mole ratio of 95/5 was applied as the substrate and dielectrics in flexible OFET, demonstrating the compatible and stable performance even after being baked at 200 °C for 2 h or 1000 bending cycles. The present study reveals the potential application of biobased PIs in electronic devices for a sustainable economy.

中文翻译：

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用于柔性电子应用的高性能基于生物质的聚酰亚胺

生物基聚合物已经在柔性和可再生电子领域受到了广泛的研究关注，以满足环境可持续性的概念。在这项研究中，我们从生物资源中开发了一系列新的聚酰亚胺（PI），用作柔性有机场效应晶体管（OFET）的衬底和电介质。由异山梨醇（ISB）合成的生物衍生的二胺（3 R，6 S）-六氢呋喃[3,2 - b ]呋喃-3,6-二丁基双（4-氨基苯甲酸酯）（ISBA）与三种均苯四酸二酐（PMDA），3,3'，4,4'-联苯四羧酸二酐（BPDA）和环丁烷-1,2,3,4-四羧酸二酐（CBDA）获得PI和共聚酰亚胺（Co-PI）具有高达53％的高生物质含量。这些生物衍生的PI具有很高的T _d超过400°C，T _g超过250°C。此外，由于刚性杂环ISB单元以及聚合物主链中CBDA和PMDA部分的结构线性，基于CBDA和PMDA的PI的CTE值低于50 ppm K ^–1。在生物基PI中还观察到了高透明性和低着色性。最后，将由CBDA / BPDA摩尔比为95/5的高耐热性PI（ISBA-C95B5）用作柔性OFET中的基材和电介质，即使在200°C的温度下烘烤后，也显示出相容和稳定的性能。 2小时或1000个弯曲周期。本研究揭示了生物基PI在电子设备中实现可持续经济的潜在应用。