通过脂酶催化转化调节纤维素的疏水性
Rahul Sharma1, Kevin H Putera1, Mark M Banaszak Holl2
1Bioresource Processing Research Institute of Australia, Department of Chemical and Biological Engineering, Monash University, Melbourne, Victoria 3800, Australia.
International journal of biological macromolecules
|November 9, 2023
概括
这项研究引入了一种更绿色的方法,用于使用脂酶催化化制造疏水性纤维素纤维. 葡萄糖酶预处理增强了耐水性,显示了环保包装应用的潜力.
科学领域:
- 生物催化和绿色化学
- 材料科学与工程 材料科学与工程
- 聚合物化学 聚合物化学
背景情况:
- 传统的疏水性纤维素纤维的生产涉及恶劣的化学品和有毒的副产品.
- 生物催化剂为修改纤维素提供了一种更温和,更环保的替代方案.
- 酶催化在纳米纤维素上对疏水性部分的接种以前已经被证明.
研究的目的:
- 在无溶剂条件下研究原生纤维素纤维,葡萄糖酶预处理纤维和纤维素纳米晶 (CNC) 的脂酶催化化.
- 为了评估形成和替代的程度.
- 评估修改纤维素材料的功能性质,包括水性和脂性.
主要方法:
- 在没有溶剂的条件下,在50°C的温度下用甲基米里酸对纤维素的脂酶催化化.
- 用1,4-β-葡萄糖酶预处理纤维素纤维.
- 使用ATR-FTIR,13C CP/MAS NMR和光学光热红外光谱 (O-PTIR) 进行表征.
- 测量水接触角度和评估纸张复合材料.
主要成果:
- 通过光谱方法 (ATR-FTIR,13C CP/MAS NMR) 证实了纤维素纤维和CNC的成功化,其替代度高达0.1.1.
- 用葡萄糖酶预处理的纤维素产物表现出最高的水接触角度 (117°±9°).
- 纸张复合材料中的化纤维素显示出增强的疏水性和脂性.
- 通过在水性介质中进行脂酶处理,证明了雌性化的可逆性.
结论:
- 脂酶催化化为生产疏水性纤维素材料提供了一条高效和绿色的途径.
- 葡萄糖酶预处理显著增强了化纤维素的疏水性质.
- 这些功能化的纤维素纤维对可持续的包装应用具有前景.
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