Exploring the unexpected influence of the Si:Ge ratio on the molecular architecture and mechanical properties of Al-free GICs

2016 ◽  
Vol 31 (5) ◽  
pp. 730-742 ◽  
Author(s):  
Brett Dickey ◽  
Richard Price ◽  
Daniel Boyd
Keyword(s):  
Mechanical Properties ◽  
Molecular Architecture

Molecular Architecture of Natural Polysaccharide Based Thin Films

2016 ◽  
Vol 258 ◽  
pp. 358-361 ◽  
Author(s):  
Yuliya V. Chudinova ◽  
Denis V. Kurek ◽  
Valery P. Varlamov
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Surface Structure ◽  
Molecular Architecture ◽  
Nanostructured Films ◽  
Thin Coatings ◽  
Force Microscopy ◽  
Atomic Force ◽  
Natural Polysaccharide

Natural biodegradable and biocompatible polysaccharides chitosan, pectin, carrageenan and heparin were used to form thin nanostructured films. In this study using atomic force microscopy (AFM) and force spectroscopy the special characteristics of formation and structure of thin coatings were investigated, three models of the polymers interaction were proposed. Different mechanisms of polymers influence on each other in the bilayers formation were shown, coatings with different surface structure and mechanical properties were formed. The obtained data can be used for the preparation of nanostructured coatings with desired surface parameters.

scholarly journals Build-To-Specification Vanillin and Phloroglucinol Derived Biobased Epoxy-Amine Vitrimers

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2645
Author(s):  
Aratz Genua ◽  
Sarah Montes ◽  
Itxaso Azcune ◽  
Alaitz Rekondo ◽  
Samuel Malburet ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Renewable Resources ◽  
Diglycidyl Ether ◽  
Vanillyl Alcohol ◽  
Molecular Architecture ◽  
Covalent Bonds ◽  
Thermoset Resins ◽  
Epoxy Amine ◽  
Reversible Covalent ◽  
Epoxy Matrices

Epoxy resins are widely used in the composite industry due to their dimensional stability, chemical resistance, and thermo-mechanical properties. However, these thermoset resins have important drawbacks. (i) The vast majority of epoxy matrices are based on non-renewable fossil-derived materials, and (ii) the highly cross-linked molecular architecture hinders their reprocessing, repairing, and recycling. In this paper, those two aspects are addressed by combining novel biobased epoxy monomers derived from renewable resources and dynamic crosslinks. Vanillin (lignin) and phloroglucinol (sugar bioconversion) precursors have been used to develop bi- and tri-functional epoxy monomers, diglycidyl ether of vanillyl alcohol (DGEVA) and phloroglucinol triepoxy (PHTE) respectively. Additionally, reversible covalent bonds have been incorporated in the network by using an aromatic disulfide-based diamine hardener. Four epoxy matrices with different ratios of epoxy monomers (DGEVA/PHTE wt%: 100/0, 60/40, 40/60, and 0/100) were developed and fully characterized in terms of thermal and mechanical properties. We demonstrate that their performances are comparable to those of commonly used fossil fuel-based epoxy thermosets with additional advanced reprocessing functionalities.

Elastic Network Modeling of Actin Filaments

2010 ◽  
Author(s):  
Tamara C. Bidone ◽  
Marco A. Deriu ◽  
Francesco Mastrangelo ◽  
Giacomo Di Benedetto ◽  
Monica Soncini ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Intermediate Filaments ◽  
Cell Mechanics ◽  
Actin Filaments ◽  
Network Modeling ◽  
Actin Microfilaments ◽  
Molecular Architecture ◽  
Elastic Network ◽  
Cellular Processes

Cell mechanics depends on the mechanical properties of actin microfilaments (MFs), microtubules (MTs) and intermediate filaments (IFs), that build the cytoskeleton. Actin microfilaments are the most abundant components and play significant roles in various cellular processes [1]. Among them, the mechanical properties of MFs are essential for the functions of the cytoskeleton and are directly related to their molecular architecture.

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