纤维素纳米胡须和核心外颗粒之间的定制相互作用决定了混合膜中的光学和机械特性
Regina Leiner1, Suteera Witayakran1,2, Sascha Verwaayen1
1Polymer Chemistry, Saarland University, Campus C4 2, 66123 Saarbrücken, Germany.
ACS applied materials & interfaces
|November 7, 2024
概括
将基组添加到核心外颗粒中,显著提高了纤维素纳米胡须 (CNW) 混合膜的抗拉强度和结构颜色. 这些功能化混合材料显示了用于先进应用的改进的机械和光学性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 聚合物化学 聚合物化学
背景情况:
- 奥帕尔膜是使用核心外颗粒和纤维素纳米胡须 (CNW) 合成的.
- 这些薄膜的机械和光学性能受到纤维素和外材料之间的粘合力的影响.
- 之前的研究缺乏对外组成如何影响混合膜性质的详细分析.
研究的目的:
- 为了研究核心外颗粒的外材料中的基团对CNW-混合光膜的特性的影响.
- 为了比较使用聚乙烯酸 (PEA) 与乙烯酸-co-2-hydroxyethyl methacrylate (P(EA-co-HEMA)) 的膜的机械和光学性能.
- 在分子和宏观层面建立结构-属性关系.
主要方法:
- 核心外颗粒与聚钢芯和PEA或PEA-co-HEMA) 的合成.
- 将CNW纳入加工的颗粒薄膜.
- 原子力显微镜 (AFM) 粒子操纵实验以量化粘附力.
- 机械测试 (拉力强度) 和光学表征 (结构颜色).
主要成果:
- 根据AFM的证据,与PEA颗粒相比,PEA-co-HEMA) 颗粒对CNW具有更强的粘附力.
- 带有P(EA-co-HEMA) 的片显示出增加的粒子障碍,导致具有角度独立结构颜色的光子眼镜.
- 拉力强度显著增加,在含有HEMA的外中,CNW含量为15%的重量时达到6 MPa,而没有CNW的外则<1 MPa.
结论:
- 在粒子外材料中存在基组 (来自HEMA) 对于增强与CNW的界面粘附至关重要.
- 增强的附着性导致更好的机械性能 (拉伸强度) 和可调节的光学特性 (角度独立的结构颜色).
- 这项研究展示了一种分子级设计策略,以显著改善混合纤维素材料的宏观性质.
更多相关视频
11:32Highly Stable, Functional Hairy Nanoparticles and Biopolymers from Wood Fibers: Towards Sustainable Nanotechnology
Published on: July 20, 2016
12.0K
11:38Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
18.4K
相关概念视频
01:15Cellulose and Pectic Polysaccharides
3.5K
Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...
As a cell matures, its cell wall specializes according to its type. For example, the...
3.5K
01:13Cell-matrix's Response to Mechanical Forces
2.6K
In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue.
Anchoring junctions mechanically attach a cell to the...
Anchoring junctions mechanically attach a cell to the...
2.6K
02:19Physical Properties Affecting Solubility
22.5K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
22.5K