亚努斯纳米纤维素膜由体等离子体:水友性到性选择性切换
Ana Oberlintner1, Vasyl Shvalya2, Neelakandan M Santhosh2
1Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia.
Carbohydrate polymers
|September 3, 2024
概括
我们开发了一种新的方法,使用温和的等离子处理,使纤维素纳米纤维膜在一侧具有防水性. 这一突破克服了可持续纳米纤维素应用的关键障碍.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 可持续材料 可持续材料
背景情况:
- 纤维素纳米纤维 (CNF) 是重要的可持续材料,但缺乏反水性.
- 目前的水化方法复杂,昂贵或有毒,限制了纳米纤维素的采用.
- 由于纳米纤维素的局限性,塑料在医疗和食品行业仍然占主导地位.
研究的目的:
- 开发一种新的,高效的,安全的方法,使纳米纤维素膜具有选择性的排水能力.
- 为了研究表面修饰的机制和贾努斯的性格发展.
- 为了证明改造的纳米纤维素膜的潜在应用.
主要方法:
- 对纳米纤维素膜进行轻度 (N2) 血处理.
- 使用拓学,化学和结构分析对表面特性进行表征.
- 第一个原则计算,以阐明疏水性机制.
主要成果:
- 在N2等离子处理20年后,在纳米纤维素膜中实现了选择性的单侧排水活性激活.
- 确定了涉及OH去除的表面重组,基板中的SiCH3组形成,以及CNH2组的出现.
- 第一原则计算证实,NH2和SiCH3组显著增强疏水性,其中起着至关重要的作用.
结论:
- 温和的N2等离子处理提供了一种有效的途径,可以创建具有可调节排水能力的Janus纳米纤维素膜.
- 经过修改的膜表现出水友和疏水性质的平衡,高抗拉强度和紫外线保护.
- 这一进步为可持续纳米纤维素材料的更广泛的工业应用铺平了道路.
相关概念视频
01:09Cell Migration
Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
01:20Mate Choice
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
01:23Membrane Fluidity
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
01:26Membrane Fluidity
Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
01:19Membrane Asymmetry Regulating Transporters
Enzymes like flippase, floppase, and scramblase transfer phospholipids from one layer to another in the membrane, thereby affecting membrane asymmetry.
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
01:28Types of Membrane Protrusions
The protrusion of the cell surface is an initial step for several cellular processes, including cell migration, phagocytosis, and neurite outgrowth. These membrane protrusions are a result of cytoskeletal rearrangement. The most widely observed cell protrusions include lamellipodia, pseudopodia, filopodia, microvilli, invadopodia, and podosomes. These protrusions can be of two types — static or dynamic.
The microvilli, an example of stable protrusions, are finger-like projections with a...
The microvilli, an example of stable protrusions, are finger-like projections with a...