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用于再生用离子液处理的纤维素的抗溶剂对其特性的影响

Marta Bloch¹, Magdalena Woźniak¹, Krzysztof Dwiecki²

¹Department of Chemistry, Faculty of Forestry and Wood Technology, Poznan University of Life Sciences, Wojska Polskiego 75, 60625 Poznan, Poland.

Molecules (Basel, Switzerland)

|September 14, 2024

概括

抗溶剂在离子液处理后显著影响纳米纤维素的特性. 水有效地去除离子液体,产生更小的纳米纤维素颗粒而无需聚合.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
纳米技术纳米技术

背景情况:

纤维素是一种多功能生物聚合物,在各种行业中都有应用.
生产纳米纤维素通常涉及使用离子液体的溶解反应.
离子液处理参数,包括再生,影响纳米纤维素的特性.

研究的目的:

研究不同抗溶剂对纳米纤维素特性的影响.
为了确定在离子液处理后再生纳米纤维素的最佳抗溶剂.
了解剩余离子液体含量与纳米纤维素晶度之间的关系.

主要方法:

使用1-乙基-3-甲基利米达酸 (EmimOAc) 的微晶纤维素溶解.
使用各种抗溶剂再生纤维素:乙,乙二,水,乙醇和乙和水混合物.
使用FTIR,XRD,DLS,SEM和EA进行表征.

主要成果:

反溶剂的选择极大地影响了EmimOAc从纤维素结构中的去除.
水,乙醇和酸盐和水混合物有效地去除了EmimOAc,不像酸盐和酸.
剩余的离子液体含量与纤维素结晶度之间存在相关性.
水作为一种抗溶剂导致了最小的纳米纤维素颗粒大小,并防止了聚合.

结论:

抗溶剂的选择对于有效的离子液体去除和纳米纤维素属性控制至关重要.
水是最有效的抗溶剂,用于生产具有所需特性的高质量纳米纤维素.
该研究提供了通过受控的再生过程来定制纳米纤维素特性的见解.

关键词:

1-乙基-3-甲基利米达酸结晶性结晶性是指结晶性.纳米纤维素的纳米纤维素.溶解溶解是一种溶解过程.

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