The intrinsic viscosities of a new potential nitrocellulose substitute, nitrated bacterial cellulose (NBC) with different nitrogen content, were investigated by the solution viscometry measurements. NBC's molecular characteristics were determined by gel permeation chromatography with a multiangle laser light scattering photometer (GPC-MALLS), and its shape was characterized by atomic force microscopy (AFM). We found that NBC's intrinsic viscosities and molecular weights increased with the increase in nitrogen content in the range of 11.97–12.88 wt%. The nitrogen content and molecular weight of NBC greatly affect its molecular characteristics in the solution, and its intrinsic viscosity is determined by its molecular weight. NBC possesses a stiff molecular chain in a dilute acetone solution and its molecular shape was observed to be spherical. This result was verified by the subsequently recorded AFM images and in accordance with the molecular dynamics simulations. The obtained data could be used to study the NBC molding process.

中文翻译：

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硝化细菌纤维素在丙酮中的溶液特性†

通过溶液粘度测定法研究了一种新的潜在硝化纤维素替代品，具有不同氮含量的硝化细菌纤维素（NBC）的特性粘度。用多角度激光散射光度计（GPC-MALLS）通过凝胶渗透色谱法测定NBC的分子特性，并通过原子力显微镜（AFM）表征其形状。我们发现NBC的特性粘度和分子量随着氮含量的增加而增加，范围为11.97–12.88 wt％。NBC的氮含量和分子量极大地影响溶液中的分子特性，其特性粘度由其分子量决定。NBC在稀丙酮溶液中具有刚性分子链，并且观察到其分子形状为球形。随后记录的AFM图像并根据分子动力学模拟验证了该结果。获得的数据可用于研究NBC成型过程。