Comparative characterization of phosphorylated wood holocelluloses and celluloses for nanocellulose production
Comparative characterization of phosphorylated wood holocelluloses and celluloses for nanocellulose production
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DOI：
10.1007/s10570-021-04013-3
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发表时间：
2021-06
期刊：
影响因子：
5.7
通讯作者：
Mengchen Zhao;Yuko Ono;Y. Noguchi;Shuji Fujisawa;Tsuguyuki Saito
中科院分区：
文献类型：
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作者：
Mengchen Zhao;Yuko Ono;Y. Noguchi;Shuji Fujisawa;Tsuguyuki Saito
纤维素纳米纤维（CNF）生产的原材料选择是定制其预期应用的CNF性能的关键步骤。因此，了解原材料对CNF性能的依赖性是必要的。然而，对于新出现的磷酸化cnf缺乏这种理解。在这里，四种类型的木质纤维素材料，即软木和硬木衍生的全新纤维素和纯化纤维素，受到磷酸化。与纤维素（2.2-2.4 mmol/g）相比，全息纤维素具有更多的磷酸基团（高达2.8 mmol/g）。两种全息纤维素在磷酸化后都保留了大量的半纤维素。半纤维素衍生的剩余中性糖的数量因木材种类而有显著差异。分解成CNFs不仅受磷酸基团的数量和结构的影响，还受原料纤维形态和半纤维素含量的影响。通过磷酸盐交联的多磷酸基团和由副反应形成的氨基甲酸酯也被量化。
Raw material selection for cellulose nanofiber (CNF) production is a crucial step for tailoring CNF properties for its intended applications. Thus, understanding the dependency of the raw material on the resulting CNF properties is imperative. However, this understanding is lacking for newly emerging phosphorylated CNFs. Herein, four types of wood cellulosic materials, namely softwood- and hardwood-derived holocelluloses and purified celluloses, were subjected to phosphorylation. The holocelluloses possessed greater amounts of phosphate groups (up to 2.8 mmol/g) than celluloses (2.2–2.4 mmol/g). Significant amounts of hemicelluloses were retained after phosphorylation in both holocelluloses. The amounts of hemicellulose-derived residual neutral sugars significantly differed depending on the wood species. The disintegration into CNFs was governed not only by the amount and structure of the phosphate groups, but also by the fiber morphology and hemicellulose content of the raw material. Polyphosphate groups, cross-linking via phosphates, and carbamates, which were formed by side reactions, were also quantified.