A novel cellulose acetate-g-poly (2-acrylamido-2-methylpropane sulfonic acid-co- methyl methacrylate) copolymer was prepared via free radical polymerization for the first time. The chemical structure of the graft copolymer was confirmed using FT-IR, ¹H NMR and EDX. The TGA and DSC investigated the thermal changes. Factors affecting the grafting process were studied and various grafting characteristic parameters such as grafting efficiency (%), grafting yield (%) and add-on value (%) were determined. Flexible membranes based on different graft copolymer compositions were fabricated by simple solution casting. Physicochemical properties including ion exchange capability (IEC), water uptake (WU) and proton conductivity (σ) were evaluated. These membranes demonstrated higher IEC, WU and conductivity than the pristine CA. The maximum proton conductivity of the CA-g-poly (2-acrylamido-2-methylpropane sulfonic acid-co- methyl methacrylate) copolymer membrane (68%; Add-on %) was found to be 6.44 × 10⁻³ S/cm compared with 0.035 × 10⁻³ S/cm of the pristine CA. Thus, the appropriate graft copolymer composition will allow fine-tuning of the physical characteristics and led to several potential applications, such as polyelectrolyte fuel cells membranes or biodiesel production.

首次通过自由基聚合制备了新型醋酸纤维素-g-聚（2-丙烯酰胺-2-甲基丙磺酸-共聚-甲基丙烯酸甲酯）共聚物。接枝共聚物的化学结构通过 FT-IR 确定，¹H NMR 和 EDX。TGA 和 DSC 研究了热变化。研究了影响接枝过程的因素，并确定了各种接枝特性参数，如接枝效率（%）、接枝率（%）和附加值（%）。通过简单的溶液浇铸制造基于不同接枝共聚物组合物的柔性膜。评估了物理化学特性，包括离子交换能力 (IEC)、吸水量 (WU) 和质子电导率 (σ)。这些膜表现出比原始 CA 更高的 IEC、WU 和电导率。发现 CA-g-聚（2-丙烯酰胺-2-甲基丙磺酸-共-甲基丙烯酸甲酯）共聚物膜（68%；附加%）的最大质子传导率为6.44 × 10 ^-3  S/cm与 0.035 × 10 相比^-3  S/cm 的原始 CA。因此，合适的接枝共聚物组合物将允许对物理特性进行微调，并导致多种潜在应用，例如聚电解质燃料电池膜或生物柴油生产。