Analysis of Structure and Properties of Chemically Metallized Polyacrylonitrile Fibrous Materials

2019 ◽  
Vol 50 (5) ◽  
pp. 428-432 ◽  
Author(s):  
N. V. Borisova ◽  
S. M. Zakirova ◽  
N. N. Krivosheina
Keyword(s):  
Fibrous Materials ◽  
Structure And Properties

scholarly journals Effect of the Hemin Molecular Complexes on the Structure and Properties of the Composite Electrospun Materials Based on Poly(3-Hydroxybutyrate)

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 4024
Author(s):  
Polina Tyubaeva ◽  
Ivetta Varyan ◽  
Anton Lobanov ◽  
Anatoly Olkhov ◽  
Anatoly Popov
Keyword(s):  
Composite Materials ◽  
Supramolecular Structure ◽  
Molecular Complexes ◽  
Fibrous Materials ◽  
Structure And Properties ◽  
Elongation At Break ◽  
Structure Morphology ◽  
Electrospinning Method ◽  
The Creation ◽  
The One

The creation of innovative fibrous materials based on biodegradable semicrystalline polymers and modifying additives is an urgent scientific problem. In particular, the development of biomedical materials based on molecular complexes and biopolymers with controlled properties is of great interest. The paper suggests an approach to modifying the structure and properties of the composite materials based on poly(3-hydroxybutyrate) (PHB) obtained by the electrospinning method using molecular complexes of hemin. The introduction of 1–5 wt. % of hemin has a significant effect on the supramolecular structure, morphology and properties of PHB-based fibers. Changes in the supramolecular structure intensified with the increasing hemin concentration. On the one hand, a decrease in the fraction of the crystalline phase by 8–10% was observed. At the same time, there is a decrease in the density of the amorphous phase by 15–70%. Moreover, the addition of hemin leads to an improvement in the strength characteristics of the material: the elongation at break increased by 1.5 times, and in the tensile strength, it increased by 3 times. The antimicrobial activity of the hemin-containing composite materials against Escherichia coli and Staphylococcus aureus was confirmed. The obtained materials are proposed to be used in the creation of composite systems for regenerative medicine.

Structure and Properties of Fibrous Materials Based on Poly(-3-Hydroxybutyrate)

2020 ◽  
Vol 992 ◽  
pp. 375-379
Author(s):  
A.A. Olkhov ◽  
P.M. Tyubaeva ◽  
A.L. Iordansky
Keyword(s):  
Molecular Structure ◽  
Fibrous Materials ◽  
Structure And Properties ◽  
Scanning Calorimetry ◽  
Paramagnetic Resonance ◽  
Electrospinning Method ◽  
Ultrathin Fibers ◽  
Model Drug ◽  
Electron Paramagnetic ◽  
Scanning Electron

The article studies the supramolecular structure of polymer matrices for sustained isolation of drugs based on ultrathin fibers of polyhydroxybutyrate obtained by electrospinning method. Dipyridamole was chosen as a model drug. The concentration of dipyridamole in the fibers ranged from 1 to 5%. The morphology of nonwoven fibrous materials was investigated by scanning electron microscopy, differential scanning calorimetry, electron paramagnetic resonance. It was shown that the addition of the dipyridamole leads to a change in the fiber geometry. Fibers based on polyhydroxybutyrate are characterized by non-equilibrium molecular structure. In the current work, it was found that the addition of dipyridamole causes extra crystallization processes and the molecular mobility in the amorphous regions of the polymer slows down

Influence of Structure and Composition of the Fibrous Materials on the Performance Characteristics of Thermal Protection Structures with Combined Functions

2018 ◽  
Vol 284 ◽  
pp. 65-70 ◽  
Author(s):  
I.V. Cherunova ◽  
L. Osipenko ◽  
M. Stenkina
Keyword(s):  
Multilayer Structure ◽  
Thermal Protection ◽  
Fibrous Materials ◽  
Structure And Properties ◽  
Ministry Of Education ◽  
State Technical ◽  
Textile Materials ◽  
Moist Environment ◽  
Protective Structures ◽  
Made In

In the article research results are presented, the aim of which is to provide high quality and reliability while using heat-protective structures for machines and people. Textile materials perform important function contacting moisture in the atmosphere. Results of moist environment textile structure and properties research are also presented here. It was established that multilayer structure with free elementary cells, including knitwear, for the purposes of barrier maintenance of moisture level is not sufficient. Based on the performed experimental research, new characteristics and properties pattern defining behavior of materials while contacting liquids (wetting, capillarity, moisture, hygroscopy) are established. Recommendations relating to groups and samples of textile materials are given. The research was made in Don State Technical University within the framework of State Assignment of the Ministry of education and science of Russia under the project 11.9194.2017/BCh.

scholarly journals The Investigation of the Structure and Properties of Ozone-Sterilized Nonwoven Biopolymer Materials for Medical Applications

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1268
Author(s):  
Polina Tyubaeva ◽  
Anna Zykova ◽  
Vyacheslav Podmasteriev ◽  
Anatoly Olkhov ◽  
Anatoly Popov ◽  
...  
Keyword(s):  
Practical Interest ◽  
Ozone Treatment ◽  
Medical Applications ◽  
Fibrous Materials ◽  
Structure And Properties ◽  
Nonwoven Materials ◽  
Developed Surface ◽  
Ultrathin Fibers ◽  
Great Practical Interest ◽  
Sterilization Process

Nowadays, the development and research of nonwoven medical fibrous materials based on biopolymers is an area of a great practical interest. One of the most promising methods for producing nonwoven materials with a highly developed surface is electrospinning (ES). In this article, the possibility of efficient sterilization of ultrathin fibers based on polyhydroxybutyrate (PHB) by ozone treatment was considered. The purpose of this work was to select the most optimal morphology of nonwoven materials for medical purposes and to establish the correlation between the supramolecular structure and the physical properties of fibrous materials while under the influence of an ozone sterilization process.

scholarly journals The Investigation of the Structure and Properties of Nonwoven Fibrous Materials Based on Polyhydroxybutyrate Biopolymer

2021 ◽  
Vol 1093 (1) ◽  
pp. 012032
Author(s):  
P M Tyubaeva ◽  
A K Zykova ◽  
E S Morokov ◽  
A A Olkhov ◽  
V V Podmasteriev ◽  
...  
Keyword(s):  
Fibrous Materials ◽  
Structure And Properties

scholarly journals Modification of Polyurethane Solutions by Means of a Hard Depositor for Fibre Production by the Electrospinning Method

2018 ◽  
Vol 26 (6(132)) ◽  
pp. 63-67 ◽  
Author(s):  
Elena S. Bokova ◽  
Grigory M. Kovalenko ◽  
Maria Pawlowa ◽  
Ksenia S. Bokova ◽  
Nataliya V. Evsyukova
Keyword(s):  
Metastable State ◽  
Applied Research ◽  
Fiber Diameter ◽  
Fibre Production ◽  
Fibrous Materials ◽  
Structure And Properties ◽  
Nonwoven Materials ◽  
Electrospinning Method ◽  
The Impact ◽  
Material Porosity

The article is devoted to fundamental and applied research in the field of the processing of polymer solutions. The purpose of this work was to identify the possibility of using modified solutions of polyurethanes for processing by electrospinning, and also to study the impact of the composition of the moulding solution on the structure and properties of fibrous materials. Nonwoven materials were obtained by electrospinning fibers from PUR solutions using NanospiderTM technology. The transfer of solutions into a metastable state, both in the case of film systems and fibres, leads to a change in the structure of the material: porosity and fiber diameter.

scholarly journals Development and Study of the Structure and Properties of a Composite Textile Material with Encapsulated Heat-Preserving Components for Heat-Protective Clothing

2021 ◽  
Vol 11 (11) ◽  
pp. 5247
Author(s):  
Irina Cherunova ◽  
Nikolai Kornev ◽  
Ekaterina Lukyanova ◽  
Valery Varavka
Keyword(s):  
Thermal Conductivity ◽  
Thermophysical Properties ◽  
Protective Clothing ◽  
Structural Parameters ◽  
Modern Technology ◽  
Fibrous Materials ◽  
Structure And Properties ◽  
Complex Materials ◽  
Textile Materials ◽  
Active Function

The modern technology of heat-protective clothing is increasingly aimed at maintaining the active function of materials. Adding heat-preserving components into the volume of heat-insulating fibrous materials changes their structure and properties. In this article, the methods of forming the structure of multi-component insulants with heat-preserving components, as well as the study of structural and thermophysical properties, are presented. Composite textile materials were used in this study, namely a 0/30/50/100% Outlast textile (based on polyester fleece, 70%) + Termofiber (fiber-insulated polyester material, 100%). Based on the research, we established the structural parameters of Termofiber fibrous canvas and the Outlast textile. The study of the thermal conductivity of complex combined insulation materials was performed for different temperature conditions (up to +25 °C) and for the proportion of the heat-accumulating textile components. Based on the obtained research results for the development of complex materials from Termofiber + the Outlast textile, the fraction of the Outlast textile component should be limited to no more than 40% for textile shells in clothing that are operated at a temperature of +5 °C or below. Further conditions for determining the composition of the studied materials for clothing can be settled by taking into account the density of the materials, the mass, and the general thermal insulation of clothing.

scholarly journals Structure and Properties of Biopolymeric Fibrous Materials Based on Polyhydroxybutyrate–Metalloporphyrin Complexes

2021 ◽  
Vol 91 (3) ◽  
pp. 546-553
Author(s):  
A. A. Ol’khov ◽  
P. M. Tyubaeva ◽  
Yu. N. Zernova ◽  
A. S. Kurnosov ◽  
S. G. Karpova ◽  
...  
Keyword(s):  
Fibrous Materials ◽  
Structure And Properties

Structure of second phases in TiAl alloys containing Cr and B

1991 ◽  
Vol 49 ◽  
pp. 576-577
Author(s):  
Ernest L. Hall ◽  
Shyh-Chin Huang
Keyword(s):  
Grain Size ◽  
Second Phase ◽  
Structure And Properties ◽  
Tial Alloys ◽  
Second Phases ◽  
Interstitial Elements

Addition of interstitial elements to γ-TiAl alloys is currently being explored as a method for improving the properties of these alloys. Previous work in which a number of interstitial elements were studied showed that boron was particularly effective in refining the grain size in castings, and led to enhanced strength while maintaining reasonable ductility. Other investigators have shown that B in γ-TiAl alloys tends to promote the formation of TiB2 as a second phase. In this study, the microstructure of Bcontaining TiAl alloys was examined in detail in order to describe the mechanism by which B alters the structure and properties of these alloys.

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