Author: Zhihang Fan
Publisher:
ISBN: 9780549059073
Category : Nanotubes
Languages : en
Pages : 254
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Book Description
The motivation of this thesis was to boost the interlaminar shear strength (ILSS) of traditional glass fiber reinforced thermoset polymer composites by strategically adding Carbon Nanotubes (CNTs) in the thickness direction by injecting CNT suspensions into the stationary glass fiber mats. The objective of this thesis is to understand the flow, rheology and impregnation of resin nanotube suspensions with the goal of aligning the nanotubes in the transverse direction in between the fiber mats.
Author: Abdullah Tugrul Seyhan
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659300653
Category :
Languages : en
Pages : 212
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Book Description
Carbon nanotubes (CNTs) with extraordinary mechanical, thermal and electrical properties have been considered one of the most promising filler candidates to manufacture electrically conductive polymer composites with improved mechanical properties. CNT modified thermoset polymer nanocomposites have recently opened up a new perception for researchers and thus become of significance in terms of creating new composite application areas. The understanding of the interphase region with respect to structure-property relationships are important to synthesizing nano-modified thermoset resins as matrix materials for reinforced composites. This book presents in detail the experimental results on processing, rheological and curing behavior of CNT modified vinyl ester resin suspensions and establishes a link between thermoset resin chemistry and the electrical, thermal and mechanical properties of the resulting nanocomposites in a concise manner. This book also provides an insight into how to prepare and use CNT modified vinyl ester suspensions as matrix materials for manufacture of fiber reinforced composite structures by using vacuum infusion (VI) and resin transfer molding (RTM) processes
Author: Wenzhong Tang
Publisher: ProQuest
ISBN: 9780549182078
Category : Molecular dynamics
Languages : en
Pages :
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Book Description
Molecular dynamics (MD) simulation method is used to simulate the dynamics of nanotubes in liquid flow. This study was motivated by our experimental work on the fabrication and mechanical properties characterization of multi-walled carbon nanotube(MWNT)-high density polyethylene (HDPE) composites fabricated by a melt processing method. SEM and TEM pictures show that the nanotubes are dispersed in the polymer matrix in small aggregates, the size of which decrease with the shearing strength in the suspension. Three types of behaviors are addressed. First, a high aspect ratio nanotube is modeled as a flexible fiber and its dynamics in simple shear flow are simulated by coupling flexible fiber dynamics based on continuum mechanics, with drag forces on the nanotube obtained from MD simulations. Results show that curved nanotubes in simple shear flow become straight and aligned along the shearing direction. Calculations also show that the viscosity of a dilute nanotube suspension increases with nanotube aspect ratio (Ar) and volume fraction (V f). For Ar = 400 and V f =0.708%, the suspension viscosity is two orders higher than the suspending liquid, which is comparable to reported viscosity measurements. The results also show that suspension viscosity decreases as the initial curvature of the nanotube increases. Second, Dynamics of a short nanotube (Ar
Author: Samaneh Abbasi
Publisher:
ISBN: 9780494623336
Category :
Languages : en
Pages :
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Book Description
Author: Suresh G Advani
Publisher: World Scientific
ISBN: 981447648X
Category : Technology & Engineering
Languages : en
Pages : 463
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Book Description
Nanotechnology is progressing very rapidly. This book focuses on carbon nanotubes and nano clays and explore their importance and roles in composites. Hence, the chapters address processing, rheology, mechanical properties and their interaction with fiber composites.Written by renowned researchers, this book is a collection of nine chapters which embrace the role of nano particles in composites. The first three chapters focus on the use of carbon nanotubes in composites. Chapter 4 explores the interaction between traditional fiber composites and the use of nano particles in terms of benefits and property enhancement in addition to the processing of such materials. Chapter 5 discusses in detail the rheology of suspensions that contain nanofibers and how one can modify existing models to describe their flow behavior. Chapters 6 through 9 address nano clay composites.
Author: Shyam Sundar Sathyanarayana
Publisher: Fraunhofer Verlag
ISBN: 9783839606032
Category :
Languages : en
Pages : 112
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Book Description
The excellent electrical, mechanical and thermal properties along with the high specific surface area of carbon nanotubes make them a strong candidate as functional fillers for polymer matrices in view of developing a multifunctional light-weight composite. However, the significant challenge in achieving a good dispersion of these nanotubes in the host polymer due to their inert chemical surface and tendency to exist as agglomerates inhibits their theoretical potential. Thermoplastic polymers, specifically olefins present a complex scenario for achieving good carbon nanotube dispersion owing to their high melt viscosity and incompatible surface energies with carbon nanotubes. Process parameter optimization and the usage of an economical reactive processing additive lead to an extremely good carbon nanotube dispersion in polypropylene, and consequently result in excellent electrical and thermal properties of the composite at very low filler loadings. Incorporation of glass fibers as secondary fillers lead to a substantial improvement in the mechanical properties of the bi-filler composite whilst preserving the enhancements in electrical and thermal properties caused by carbon nanotube addition. This led to a multifunctional composite with excellent electrical, structural and thermal properties with significant potential for light-weight product development.
Author: Cor Koning
Publisher: CRC Press
ISBN: 9814364169
Category : Science
Languages : en
Pages : 248
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Book Description
This book provides readers with a comprehensive toolbox for dispersing single-walled and multiwalled carbon nanotubes in thermoplastic polymer matrices. The book starts with an overview of all known techniques for dispersing CNTs in thermoplastic polymers and then concentrates on one of the most versatile techniques known nowadays: the so-called la
Author: Ganiu Babatunde Olowojoba
Publisher: Fraunhofer Verlag
ISBN: 9783839605844
Category :
Languages : en
Pages : 128
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Book Description
Owing to their remarkable properties, carbon nanotubes (CNTs) hold a huge potential as fillers in the production of multifunctional composites for many applications. However, their tendency to agglomerate as well as their chemically inert surface makes the task of dispersion very challenging. In spite of the immense effort aimed at understanding CNT dispersions and its implication for the properties of nanocomposites and suspensions, very little progress has thus far been made in terms of correlating the microstructural morphology of nanocomposites to their properties. By measuring the extend of interfacial polarization in CNT/epoxy suspensions subjected to oscillatory shear flow in a rheometer, a novel measurement strategy for assessing the dispersion evolution of CNTs, during shear mixing in an epoxy resin with a three-roll mill, has been developed in this study. This allowed the influence of applied shear intensity, compatibility between CNT and matrix, initial CNT agglomerate morphology, as well as matrix viscosity on CNT dispersion quality during shear mixing to be investigated.
Author: Dimitrios Tasis
Publisher: Royal Society of Chemistry
ISBN: 1782625828
Category : Technology & Engineering
Languages : en
Pages : 293
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Book Description
Chemically-modified carbon nanotubes (CNTs) exhibit a wide range of physical and chemical properties which makes them an attractive starting material for the preparation of super-strong and highly-conductive fibres and films. Much information is available across the primary literature, making it difficult to obtain an overall picture of the state-of-the-art. This volume brings together some of the leading researchers in the field from across the globe to present the potential these materials have, not only in developing and characterising novel materials but also the devices which can be fabricated from them. Topics featured in the book include Raman characterisation, industrial polymer materials, actuators and sensors and polymer reinforcement, with chapters prepared by highly-cited authors from across the globe. A valuable handbook for any academic or industrial laboratory, this book will appeal to newcomers to the field and established researchers alike.
Author: Peng-Cheng Ma
Publisher: CRC Press
ISBN: 9781439826218
Category : Technology & Engineering
Languages : en
Pages : 224
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Book Description
Discovered in the twentieth century, carbon nanotubes (CNT) were an integral part of science and industry by the beginning of the twenty first century, revolutionizing chemistry, physics, and materials science. More recent advances in carbon nanotube production methods have resulted in a tremendous push to incorporate CNTs into polymer matrices. Although many advances have been made, two major obstacles continue unresolved: the enhancement of interfacial adhesion between CNTs and polymer matrix, and the improvement of dispersion of CNTs in polymers. Both substantial original contributors to the field, the authors present Carbon Nanotubes for Polymer Reinforcement, the first monograph on various conventional and innovative techniques to disperse and functionalize carbon nanotubes for polymer reinforcement, elegantly explaining the basic sciences and technologies involved in those processes. Topics covered include: Use of CNTs in fabricating novel polymer composites Principles and mechanisms behind CNT dispersion and functionalization Methods for the functionalization and dispersion of CNTs in polymer matrices Effects of CNTs on functional and mechanical properties of polymer composites Optimization of CNT/polymer nanocomposite fabrication Carbon Nanotubes for Polymer Reinforcement is a comprehensive treatment and critical review of the new class of polymer nanocomposites, and points to areas of future developments. Composites engineers, scientists, researchers, and students will find the basic knowledge and technical results contained herein informative and useful references for their work, whether for advanced research or for design and manufacture of such composites.
