This study presents the development of Cellulose Propanoate Ester (CP)/1,2,3-propanetriol composite membranes as a sustainable alternative to conventional Cellulose Acetate (CA)-based membranes, which typically exhibit reduced thermal stability when porous structures are introduced. The incorporation of 1,2,3-propanetriol into the CP polymer matrix resulted in significant plasticization and controlled pore formation under applied gas pressure. Gas permeance measurements revealed that the CP/1,2,3-propanetriol composite membrane, with permeability initiating at 2.5 bar, demonstrated superior mechanical strength compared to the CA/1,2,3-propanetriol composite membrane, which began permeation at just 0.6 bar. Scanning Electron Microscopy (SEM) analysis confirmed extensive pore formation in the CP membrane, achieving a porosity of 53.4 % at 3 bar. Fourier Transform Infrared Spectroscopy (FT-IR) analysis highlighted the plasticizing effect of 1,2,3-propanetriol, and Thermogravimetric Analysis (TGA) demonstrated the superior thermal stability of the CP/1,2,3-propanetriol composite membrane compared to both neat CP and CA membranes, despite increased porosity. Furthermore, the CP membrane retained its transparency, indicating that robust mechanical properties can be achieved without crystalline structure. The combination of mechanical strength, transparency, and thermal stability makes CP/1,2,3-propanetriol composite membranes a promising alternative to CA-based membranes for a range of applications.

中文翻译：

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高性能丙酸纤维素酯/1,2,3-丙三醇复合膜的开发：增强热稳定性和透明度


本研究介绍了丙酸纤维素酯 （CP）/1,2,3-丙三醇复合膜的开发，作为传统醋酸纤维素 （CA） 基膜的可持续替代品，传统醋酸纤维素 （CA） 膜在引入多孔结构时通常表现出较低的热稳定性。在施加的气体压力下，将 1,2,3-丙三醇掺入 CP 聚合物基体中导致显着的塑化并受控的孔隙形成。气体渗透率测量表明，CP/1,2,3-丙三醇复合膜的渗透率从 2.5 bar 开始，与 CA/1,2,3-丙三醇复合膜相比，其机械强度更高，CA/1,2,3-丙三醇复合膜的渗透率仅为 0.6 bar。扫描电子显微镜 （SEM） 分析证实 CP 膜中形成了广泛的孔隙，在 3 bar 时孔隙率达到 53.4%。傅里叶变换红外光谱 （FT-IR） 分析强调了 1,2,3-丙三醇的塑化效果，热重分析 （TGA） 表明，尽管孔隙率增加，但与纯 CP 和 CA 膜相比，CP/1,2,3-丙三醇复合膜具有优异的热稳定性。此外，CP 膜保持了其透明度，表明可以在没有晶体结构的情况下实现强大的机械性能。CP/1,2,3-丙三醇复合膜的机械强度、透明度和热稳定性相结合，使其成为 CA 基膜的有前途的替代品，适用于各种应用。