素作为界面兼容剂在设计基纤维素聚复合膜中的作用
Erfan Kimiaei1, Muhammad Farooq1, Paulina Szymoniak2
1Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, PO Box 16300, FIN-00076 Aalto, Espoo, Finland.
Journal of colloid and interface science
|October 25, 2024
概括
素纳米粒子 (LNP) 通过修改接口,有效地使纤维素纳米纤维 (CNF) 和聚烯酸 (PCL) 兼容. 这项研究量化了LNP吸附,并证明了它们在改善复合材料分散和降低先进材料表面能量方面的作用.
科学领域:
- 材料科学与工程 材料科学与工程
- 聚合物科学 聚合物科学
- 纳米技术 纳米技术
背景情况:
- 纳米复合材料的性能严重依赖于纳米级的界面相互作用和粘附.
- 为了达到最佳性能,需要仔细设计不同组件之间的接口.
- 纤维素纳米纤维 (CNF) 是水友性,而聚合物如聚烯 (PCL) 是疏水性,呈现兼容性挑战.
研究的目的:
- 研究素纳米粒子 (LNP) 作为CNF和PCL之间的界面兼容器的有效性.
- 分析CNF/PCL纳米复合材料中的表面与散装相互作用和分子运动.
- 阐明LNP如何改变复合材料的界面特性和分散.
主要方法:
- 石英晶体微平衡与消散 (QCM-D) 用于量化LNP在CNF和PCL模型膜上的吸附.
- 原子力显微镜 (AFM) 和水接触角 (WCA) 测量以评估表面形态和可湿性.
- 宽带介电光谱 (BDS) 用于研究干燥状态下的分子移动性和分散.
- 逆气色谱 (IGC) 用于确定表面能量和界面特性.
主要成果:
- 在CNF (1186 ± 178 ng.cm−2) 和PCL (270 ± 64 ng.cm−2) 表面上,LNP显示出显著的吸附,与PCL (136 ± 35 ng.cm−2) 上的CNF不同.
- BDS结果表明,LNPs改善了PCL在CNF网络中的分散.
- IGC分析显示,LNP降低了复合膜的整体表面能量,可能是通过修改基可用性.
结论:
- 素纳米颗粒作为有效的兼容剂,弥合了水友性CNF和水性PCL阶段.
- LNP显著改变了界面特性,增强了分散,减少了表面能量.
- 通过像LNP这样的代理来控制纳米级接口对于开发下一代纳米复合材料至关重要.
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