Jiao Wei, Zhou Jie, Gu Qinying, Liu Zijun, Pan Jiashu, Qin Jiangchun, Zhu Yiyi, Jiang Dengbang, Hu Jiayang
National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China.
Hubei Academy of Forestry, Wuhan 430075, China.
Polymers (Basel). 2025 May 16;17(10):1362. doi: 10.3390/polym17101362.
The need for renewable alternatives to petroleum-based polymers is growing in response to environmental concerns and resource depletion. Polyimides (PIs), which are traditionally synthesized from petroleum-derived monomers, raise sustainability issues. In this work, renewable 2,5-furandicarboxylic acid (FDCA) was employed as a sustainable feedstock to synthesize a bio-based diamine monomer, N,N'-bis(4-aminophenyl)furan-2,5-dicarboxamide (FPA). Subsequently, FPA was polymerized with various aromatic dianhydrides through thermal imidization, yielding four distinct bio-based polyimide (FPA-PI) films. The resulting films exhibited exceptional thermal stability, with 5% weight loss temperatures exceeding 425 °C and char yields ranging from 54% to 60%. Mechanical characterization revealed high elastic moduli (2.14-3.20 GPa), moderate tensile strengths (50-99 MPa), and favorable aging resistance. Gas permeation tests demonstrated promising CO/N separation performance, with FPA-DODDA achieving superior CO/N selectivity (27.721) compared to commercial films such as Matrimid, polysulfone, and polycarbonate, while FPA-BPFLDA exhibited enhanced CO permeability (P(CO) = 2.526 Barrer), surpassing that of Torlon. The CO/N separation performance of these FPA-PI films is governed synergistically by size-sieving effects and solution-diffusion mechanisms. This work not only introduces a novel synthetic route for bio-based polymers but also highlights the potential of replacing conventional petroleum-based materials with renewable alternatives in high-temperature and gas separation applications, thereby advancing environmental sustainability.
由于环境问题和资源枯竭，对石油基聚合物的可再生替代物的需求日益增长。聚酰亚胺（PI）传统上由石油衍生的单体合成，这引发了可持续性问题。在这项工作中，可再生的2,5-呋喃二甲酸（FDCA）被用作可持续原料，以合成一种生物基二胺单体，N,N'-双（4-氨基苯基）呋喃-2,5-二甲酰胺（FPA）。随后，FPA通过热亚胺化与各种芳香族二酐聚合，得到四种不同的生物基聚酰亚胺（FPA-PI）薄膜。所得薄膜表现出优异的热稳定性，5%失重温度超过425℃，残炭率在54%至60%之间。力学性能表征显示出高弹性模量（2.14-3.20 GPa）、中等拉伸强度（50-99 MPa）和良好的耐老化性。气体渗透测试表明其具有良好的CO/N分离性能，与Matrimid、聚砜和聚碳酸酯等商业薄膜相比，FPA-DODDA实现了卓越的CO/N选择性（27.721），而FPA-BPFLDA表现出增强的CO渗透性（P(CO)=2.526 Barrer），超过了Torlon。这些FPA-PI薄膜的CO/N分离性能由筛分效应和溶解扩散机制协同控制。这项工作不仅引入了一种新型的生物基聚合物合成路线，还突出了在高温和气体分离应用中用可再生替代物取代传统石油基材料的潜力，从而推动环境可持续性发展。
