Evaluating the quality and processability of cotton linter-derived cellulose acetate by characterization of native and artificial fines

IF 4.9 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD

Cellulose Pub Date : 2025-03-04 DOI:10.1007/s10570-025-06449-3

Phoenix Tiller, Seonghyun Park, John Sanders, Trevor Treasure, Sunkyu Park

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Abstract

Understanding the chemical characteristics and residual impurities of a dissolving pulp feedstock is necessary to enhance both the quality and processability of yielded cellulose acetates. Fiber fractionation was performed with three different cotton linter feedstocks. Biomass compositional analysis and fiber quality analysis were used to determine the carbohydrate content of the fractionated fibers and the quantity of fines. To evaluate the impact of fines on the acetylation of cotton linters, artificial fines were prepared from fractionated long fibers and added back to long fibers in varying fines content blends. The cotton linter pulps and artificial fines blends were used to generate acetates which were characterized via degree of substitution measurement by FTIR, the ensuing weight fraction of acetone insoluble substance, and the filtration rate of the acetate. A test to measure the amount of sulfuric acid insoluble substances (SIS) was developed to explain the formation of insoluble gel particles in acetate media; an R² of 0.97 was found between fines and resulting SIS. Then, SIS contents were correlated with the acetone insoluble substances in the acetates (R² = 0.98). Fines contents were found to be highly influential on the acetate’s degree of substitution, insoluble substance content, and filtration rate (R² = 0.99). Thorough activation and excess acetic anhydride reagent were found to limit the effects of fines on degree of substitution.

Graphical abstract

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用天然和人造细纤维的特性来评价棉绒衍生醋酸纤维素的质量和加工性

了解溶解浆原料的化学特性和残留杂质对提高生产的醋酸纤维素的质量和可加工性是必要的。用三种不同的棉绒原料进行了纤维分馏。采用生物量组成分析和纤维品质分析测定了分馏纤维的碳水化合物含量和细粒数。为了评价细粒对棉毛乙酰化的影响，将长纤维分馏后制备人工细粒，并将其加入不同细粒含量的共混物中。用棉絮浆和人工细纤维共混制得乙酸酯，用红外光谱法测定了乙酸酯的取代度、丙酮不溶物的质量分数和乙酸酯的过滤率。为了解释醋酸介质中不溶性凝胶颗粒的形成，提出了测定硫酸不溶性物质（SIS）量的方法；罚款与结果SIS之间的R2为0.97。SIS含量与乙酸酯中丙酮不溶性物质呈显著相关（R2 = 0.98）。细粒含量对乙酸酯的取代度、不溶性物质含量和滤过率有很大影响（R2 = 0.99）。充分的活化和过量的乙酸酐试剂限制了细粒对取代度的影响。图形抽象

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.