scholarly journals Rheological Properties of Carbon Nanofiber-Filled Polyamide Composites and Blend of these Composites and TPE

10.5772/64531 ◽  
2016 ◽  
Author(s):  
Yosuke Nishitani ◽  
Takeshi Kitano
Keyword(s):  
Rheological Properties ◽  
Carbon Nanofiber

Correlation of Vulcanization and Viscoelastic Properties of Nanocomposites Based on Natural Rubber and Different Nanofillers, with Molecular and Supramolecular Structure

2010 ◽  
Vol 83 (1) ◽  
pp. 16-34 ◽  
Author(s):  
Mithun Bhattacharya ◽  
Anil K. Bhowmick
Keyword(s):  
Natural Rubber ◽  
Rheological Properties ◽  
Supramolecular Structure ◽  
Carbon Nanofiber ◽  
Volume Fraction ◽  
Barrier Properties ◽  
Qualitative Description ◽  
Viscoelastic Parameters ◽  
Low Volume ◽  
And Performance

Abstract Elastomer nanocomposites reinforced with low volume fraction of nanofillers, such as nanoclays and carbon nanofibers, have long been known to possess significantly improved mechanical, thermal, dynamic mechanical, flame retardant, and barrier properties. The present work attempts to evaluate the effect of nanofillers (like modified and unmodified montmorillonite, sepiolite, carbon nanofiber, and carbon black) and their amount on vulcanization, as well as dynamic and rheological properties in the prevulcanization and postvulcanization stages. Upon using organomodified nanoclay, optimum cure time was reduced and cure rate index increased; whereas, in comparison, carbon nanofiber resulted in a slower cure. The influence of loading of some representative nanofillers on natural rubber was studied through qualitative description of critical dynamic viscoelastic parameters, which indicated the formation of supramolecular structure even at low volume fraction. The nanocomposite vulcanizates showed solidlike rheological behavior and upon implementation of dispersion techniques the activation energy of flow was reduced by around 60%. The knowledge of cure and rheological properties of the compounds, which evolves from the structure formation, can be utilized for assessing process optimization, cost reduction, and performance of the nanocomposites.

Using the alveograph in developing requirements for the quality of flour for wafer sheet production

2020 ◽  
Vol 29 (12) ◽  
pp. 52-58
Author(s):  
E.P. Meleshkina ◽  
◽  
S.N. Kolomiets ◽  
A.S. Cheskidova ◽  
◽  
...  
Keyword(s):  
Rheological Properties ◽  
Quality Indicators ◽  
Wheat Flour ◽  
Mathematical Statistics ◽  
Intended Purpose ◽  
The Future ◽  
Relationship Of ◽  
The Relationship

Objectively and reliably determined indicators of rheological properties of the dough were identified using the alveograph device to create a system of classifications of wheat and flour from it for the intended purpose in the future. The analysis of the relationship of standardized quality indicators, as well as newly developed indicators for identifying them, differentiating the quality of wheat flour for the intended purpose, i.e. for finished products. To do this, we use mathematical statistics methods.

THE INFLUENCE OF SELECTED POLYMERS ON THE RHEOLOGICAL PROPERTIES OF HYDROGELS WITH CHITOSAN APPLIED ON THE SKIN

2017 ◽  
Vol XXII ◽  
pp. 201-206 ◽  
Author(s):  
Maria Szcześniak ◽  
◽  
Bożena Grimling ◽  
Jan Meler ◽  
Bożena Karolewicz
Keyword(s):  
Rheological Properties

THE RHEOLOGICAL PROPERTIES OF BLOOD UNDER BASAL CELL SKIN CANCER IN THE IMMEDIATE POSTOPERATIVE PERIOD

2016 ◽  
Vol 26 (3) ◽  
pp. 370-380
Author(s):  
Vladimir V. Maslyakov ◽  
◽  
Olga I. Dralina ◽  
Yuliya B. Vlasenko ◽  
Larisa M. Kim
Keyword(s):  
Skin Cancer ◽  
Rheological Properties ◽  
Basal Cell ◽  
Postoperative Period

Connections between glutenin proteins and rheological properties of winter wheat

2006 ◽  
Vol 34 (1) ◽  
pp. 693-696 ◽  
Author(s):  
Árpád Tóth ◽  
Péter Sipos ◽  
Mária Borbély ◽  
Csilla Uri ◽  
Ágnes Elek ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Rheological Properties

Cytocompatibility of Carbon Nanofiber Materials for Neural Applications

2003 ◽  
Vol 774 ◽  
Author(s):  
Janice L. McKenzie ◽  
Michael C. Waid ◽  
Riyi Shi ◽  
Thomas J. Webster
Keyword(s):  
Carbon Fiber ◽  
Surface Energy ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
Carbon Nanofiber ◽  
Fiber Composite ◽  
Scar Tissue ◽  
Pc 12 Cells ◽  
Low Surface Energy ◽  
Poly Carbonate

AbstractSince the cytocompatibility of carbon nanofibers with respect to neural applications remains largely uninvestigated, the objective of the present in vitro study was to determine cytocompatibility properties of formulations containing carbon nanofibers. Carbon fiber substrates were prepared from four different types of carbon fibers, two with nanoscale diameters (nanophase, or less than or equal to 100 nm) and two with conventional diameters (or greater than 200 nm). Within these two categories, both a high and a low surface energy fiber were investigated and tested. Astrocytes (glial scar tissue-forming cells) and pheochromocytoma cells (PC-12; neuronal-like cells) were seeded separately onto the substrates. Results provided the first evidence that astrocytes preferentially adhered on the carbon fiber that had the largest diameter and the lowest surface energy. PC-12 cells exhibited the most neurites on the carbon fiber with nanodimensions and low surface energy. These results may indicate that PC-12 cells prefer nanoscale carbon fibers while astrocytes prefer conventional scale fibers. A composite was formed from poly-carbonate urethane and the 60 nm carbon fiber. Composite substrates were thus formed using different weight percentages of this fiber in the polymer matrix. Increased astrocyte adherence and PC-12 neurite density corresponded to decreasing amounts of the carbon nanofibers in the poly-carbonate urethane matrices. Controlling carbon fiber diameter may be an approach for increasing implant contact with neurons and decreasing scar tissue formation.

Cytocompatibility and Material Properties of Poly-carbonate Urethane/Carbon Nanofiber Composites for Neural Applications

2003 ◽  
Vol 774 ◽  
Author(s):  
Janice L. McKenzie ◽  
Michael C. Waid ◽  
Riyi Shi ◽  
Thomas J. Webster
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanofibers ◽  
Material Properties ◽  
Carbon Nanofiber ◽  
Scar Tissue ◽  
Tissue Response ◽  
Positive Interactions ◽  
Weight Percentage ◽  
Poly Carbonate

AbstractCarbon nanofibers possess excellent conductivity properties, which may be beneficial in the design of more effective neural prostheses, however, limited evidence on their cytocompatibility properties exists. The objective of the present in vitro study was to determine cytocompatibility and material properties of formulations containing carbon nanofibers to predict the gliotic scar tissue response. Poly-carbonate urethane was combined with carbon nanofibers in varying weight percentages to provide a supportive matrix with beneficial bulk electrical and mechanical properties. The substrates were tested for mechanical properties and conductivity. Astrocytes (glial scar tissue-forming cells) were seeded onto the substrates for adhesion. Results provided the first evidence that astrocytes preferentially adhered to the composite material that contained the lowest weight percentage of carbon nanofibers. Positive interactions with neurons, and, at the same time, limited astrocyte functions leading to decreased gliotic scar tissue formation are essential for increased neuronal implant efficacy.

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