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用酸作为同质催化剂在离子液中高效的一步合成纤维素酸盐
Yujia Liu1, Lina Zhang2, Qurat Ul Ain3
1Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification, Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
这项研究引入了一种更绿色,单步方法,使用酸和离子液体生产纤维素酸盐. 这种高效的工艺产生了高质量的纤维素酸薄膜,有可能取代以石油为基础的塑料.
科学领域:
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
- 聚合物化学 聚合物化学
背景情况:
- 传统的纤维素酸盐合成涉及苛刻的化学品,高成本和环境问题.
- 现有的方法需要纤维素激活,腐蚀性催化剂和水解步骤,使生产复杂化.
研究的目的:
- 开发一种可持续,经济有效和高效的单步方法来合成纤维素酸盐.
- 调查使用酸和1--3-甲基利米达化 (BmimCl) 离子液用于纤维素乙化.
- 为了精确控制合成的纤维素酸盐中的替代度 (DS).
主要方法:
- 在单个步骤中使用酸和BmimCl离子液体进行纤维素乙化.
- 改变反应条件以控制取代度 (DS) 从0.71到3.0.
- 由此产生的纤维素酸薄膜的特性,包括透明度,抗拉强度和水蒸气透性.
主要成果:
- 通过可调节的DS (0.713.0) 实现了纤维素酸盐的单步合成.
- 在广泛的温度范围内,通过酸证明了增强的乙化效率.
- 生产的纤维素酸薄膜具有95%的透明度,64.5MPa的抗拉强度和低的水蒸气透性 (34.48g/m2h-1).
结论:
- 拟议的方法为纤维素酸盐生产提供了一种可持续的,具有成本效益和可扩展的途径.
- 合成的纤维素酸盐具有出色的性能,使其成为石油基塑料的可行替代品.
- 这种新的策略显著提高了离子液体中纤维素乙化效率.
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