Abstract

This paper reports on a flowable lignocellulosic thermoplastic prepared from forestry biomass by solvent-free acetylation. The non-solvent approach relies upon a functionalizing agent derived from benzethonium chloride (hyamine) and sulfuric acid, which was chose for its similar wetting attributes to an ionic liquid for the lignocellulose but was much less expensive to use. Besides acetylation, this functionalizing agent became chemically bonded to the lignocellulose by the sulfate group formed in situ, as demonstrated by ¹³C NMR, infrared and elemental analysis. This attached species appeared to contribute strongly to the flowable nature of the product. The modified material showed good melt flowability by compression molding, as demonstrated in this study by the production of semi-transparent films and was characterized by differential scanning calorimetry and dynamic mechanical analysis. An experimental investigation of reaction parameters was included in the study, exploring the mechanism by which the cationic functionalizing agent modified the structure of lignocellulose.

Graphic Abstract

中文翻译：

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木质纤维素木浆的无溶剂改性为可熔融流动的热塑性塑料

摘要

本文报道了由林业生物质通过无溶剂乙酰化制得的可流动的木质纤维素热塑性塑料。非溶剂方法依赖于衍生自苄索氯铵（hyamine）和硫酸的官能化剂，选择该官能化剂的原因是其与木质纤维素的离子液体具有相似的润湿特性，但使用成本却低得多。除乙酰化外，该功能化剂还通过原位形成的硫酸根化学键合到木质纤维素上，如图^13所示。13 C NMR，红外和元素分析。这种附着的物质似乎对产品的流动性有很大贡献。改性材料通过压模显示出良好的熔体流动性，如本研究中通过半透明薄膜的生产所证明的那样，并通过差示扫描量热法和动态力学分析进行了表征。研究中对反应参数进行了实验研究，探讨了阳离子功能化剂修饰木质纤维素结构的机理。

图形摘要