The characteristics of cellulose nanofibers (CNFs) depend on many factors such as the raw material, type and intensity of the pre-treatment, and type and severity of the mechanical defibrillation process. The relationship among factors is complex but crucial in determining the final, fit-for-use CNF properties. This study aims to find the relationship between the CNF properties morphology, aspect ratio, nanofibrillation yield, transmittance and cationic demand, and the production process using bleached Aspen thermomechanical pulp as the raw material. Five different types of pretreatments were carried out and five different defibrillation intensities of high-pressure homogenization were evaluated. Pretreatments were: PFI refining at 20,000 revolutions, enzymatic hydrolysis with 80 and 240 g of enzyme per ton of dry pulp and TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl)–mediated oxidation with 5 and 15 mmol of NaClO per gram of dry pulp. From the twenty-five different procedures evaluated, results show that both the pretreatment and the severity of the high-pressure homogenization determined both the fibrillation yield and the CNF morphology. Moreover, the main properties of CNFs (cationic demand, yield, transmittance and aspect ratio) can be estimated from the carboxylic content of the pretreated pulp, which would facilitate the control of the CNF production and their tuning according to the production needs.

纤维素纳米纤维 (CNF) 的特性取决于许多因素，例如原材料、预处理的类型和强度，以及机械除颤过程的类型和严重程度。因素之间的关系很复杂，但对于确定最终的、适合使用的 CNF 特性至关重要。本研究旨在寻找CNF性能形态、纵横比、纳米原纤化产率、透光率和阳离子需求与以漂白白杨木热机械纸浆为原料的生产工艺之间的关系。进行了五种不同类型的预处理，并评估了五种不同的高压均质除颤强度。预处理为：20,000 转的 PFI 精炼，每吨干纸浆使用 80 和 240 克酶的酶促水解和 TEMPO (2,2,6, 6-四甲基哌啶-1-氧基）介导的氧化作用，每克干纸浆含有 5 和 15 mmol NaClO。从评估的 25 种不同程序中，结果表明，预处理和高压均化的严重程度决定了原纤维化产率和 CNF 形态。此外，CNFs 的主要特性（阳离子需求、产率、透射率和纵横比）可以从预处理纸浆的羧基含量估计，这将有助于控制 CNF 生产并根据生产需要进行调整。结果表明，预处理和高压均化的严重程度决定了原纤化产率和 CNF 形态。此外，CNFs 的主要特性（阳离子需求、产率、透射率和纵横比）可以从预处理纸浆的羧基含量估计，这将有助于控制 CNF 生产并根据生产需要进行调整。结果表明，预处理和高压均化的严重程度决定了原纤化产率和 CNF 形态。此外，CNFs 的主要特性（阳离子需求、产率、透射率和纵横比）可以从预处理纸浆的羧基含量估计，这将有助于控制 CNF 生产并根据生产需要进行调整。