Author: Carrie Elizabeth Cornelius
Publisher:
ISBN:
Category :
Languages : en
Pages : 143

Get Book Here

Book Description
Keywords: HTCC, plasma, substrate, wool, cellulosic paper.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Get Book Here

Book Description
The purpose of this research has been to characterize the parameters of an Atmospheric Plasma Device used for surface modifications and functionalization of textile materials. Device parameters are determined in absence and presence of a substrate to quantify the optimal operational conditions. Neutral gas temperature profiles were determined for a variety of gas mixtures including 100% helium and helium with 1 or 2% reactive gases, such as oxygen and carbontetrafluoride. A plasma model was developed to solve for other plasma parameters including the electron-neutral collision frequency and the electron number density. Wool substrates were treated with various gas mixtures for a range of exposure durations and the effects of plasma treatment on weight, surface-functionality, and strength were assessed. Assessment methods include percent weight change calculations, energy dispersive X-ray spectroscopy (EDS), and tensile testing. In addition, cellulosic paper was exposed to 1% oxygen plasma to determine the feasibility of permanently grafting the anti-microbial agent HTCC (quaternized ammonium chitosan). The success of the bond was tested using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), colorimetry, and percent weight change, and the permanency of the bond was tested though soxhlet extraction.

Author: Rory A. Wolf
Publisher: John Wiley & Sons
ISBN: 1118547551
Category : Technology & Engineering
Languages : en
Pages : 268

Get Book Here

Book Description
This Book's focus and intent is to impart an understanding of the practical application of atmospheric plasma for the advancement of a wide range of current and emerging technologies. The primary key feature of this book is the introduction of over thirteen years of practical experimental evidence of successful surface modifications by atmospheric plasma methods. It offers a handbook-based approach for leveraging and optimizing atmospheric plasma technologies which are currently in commercial use. It also offers a complete treatment of both basic plasma physics and industrial plasma processing with the intention of becoming a primary reference for students and professionals. The reader will learn the mechanisms which control and operate atmospheric plasma technologies and how these technologies can be leveraged to develop in-line continuous processing of a wide variety of substrates. Readers will gain an understanding of specific surface modification effects by atmospheric plasmas, and how to best characterize those modifications to optimize surface cleaning and functionalization for adhesion promotion. The book also features a series of chapters written to address practical surface modification effects of atmospheric plasmas within specific application markets, and a commercially-focused assessment of those effects.

Author: George E. Totten
Publisher: CRC Press
ISBN: 0824752686
Category : Technology & Engineering
Languages : en
Pages : 922

Get Book Here

Book Description
Leading readers through an extensive compilation of surface modification reactions and processes for specific tribological results, this reference compiles detailed studies on various residual stresses, reaction processes and mechanisms, heat treatment methods, plasma-based techniques, and more, for a solid understanding of surface structural changes that occur during various engineering procedures. This unique book explores topics previously ignored in other texts on surface engineering and tribology, offers guidelines for the consideration and design of wear life and frictional performance, and sections on laser impingement and nanometer scale surface modification.

Author: Thomas Scott Williams
Publisher:
ISBN:
Category :
Languages : en
Pages : 267

Get Book Here

Book Description
An atmospheric pressure plasma source operating at temperatures below 150°C and fed with 1.0-3.0 volume% oxygen in helium was used to activate the surfaces of the native oxide on silicon, carbon-fiber reinforced epoxy composite, stainless steel type 410, and aluminum alloy 2024. Helium and oxygen were passed through the plasma source, whereby ionization occurred and ~1016 cm−3 oxygen atoms, ~1015 cm−3 ozone molecules and ~1016 cm3 metastable oxygen molecules (O21[delta]_g) were generated. The plasma afterglow was directed onto the substrate material located 4 mm downstream. Surface properties of the plasma treated materials have been investigated using water contact angle (WCA), atomic force microscopy (AFM), infrared spectroscopy (IR), and x-ray photoelectron spectroscopy (XPS). The work presented herein establishes atmospheric-pressure plasma as a surface preparation technique that is well suited for surface activation and enhanced adhesive bond strength in a variety of materials. Atmospheric plasma activation presents an environmentally friendly alternative to wet chemical and abrasive methods of surface preparation. Attenuated total internal reflection infrared spectroscopy was used to study the aging mechanism of the native oxide on silicon. During storage at ambient conditions, the water contact angle of a clean surface increased from

Author: Norihiro Inagaki
Publisher: CRC Press
ISBN: 1498710832
Category : Technology & Engineering
Languages : en
Pages : 281

Get Book Here

Book Description
In current materials R&D, high priority is given to surface modification techniques to achieve improved surface properties for specific applications requirements. Plasma treatment and polymerization are important technologies for this purpose. This book provides a basic and thorough presentation of this subject. This is probably the first book

Author: Jong Wan Hu
Publisher: Trans Tech Publications Ltd
ISBN: 3036412913
Category : Science
Languages : en
Pages : 125

Get Book Here

Book Description
Selected peer-reviewed extended articles based on abstracts presented at the 8th International Conference on Applied Engineering, Materials and Mechanics (ICAEMM 2023) Aggregated Book

Author: Sabu Thomas
Publisher: Elsevier
ISBN: 0128131535
Category : Technology & Engineering
Languages : en
Pages : 496

Get Book Here

Book Description
Non-Thermal Plasma Technology for Polymeric Materials: Applications in Composites, Nanostructured Materials and Biomedical Fields provides both an introduction and practical guide to plasma synthesis, modification and processing of polymers, their composites, nancomposites, blends, IPNs and gels. It examines the current state-of-the-art and new challenges in the field, including the use of plasma treatment to enhance adhesion, characterization techniques, and the environmental aspects of the process. Particular attention is paid to the effects on the final properties of composites and the characterization of fiber/polymer surface interactions. This book helps demystify the process of plasma polymerization, providing a thorough grounding in the fundamentals of plasma technology as they relate to polymers. It is ideal for materials scientists, polymer chemists, and engineers, acting as a guide to further research into new applications of this technology in the real world. - Enables materials scientists and engineers to deploy plasma technology for surface treatment, characterization and analysis of polymeric materials - Reviews the state-of-the-art in plasma technology for polymer synthesis and processing - Presents detailed coverage of the most advanced applications for plasma polymerization, particularly in medicine and biomedical engineering, areas such as implants, biosensors and tissue engineering

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Get Book Here

Book Description
The purpose of the research has been to understand plasma-substrate interactions and an application to adhesion enhancement of high performance fiber under capacitively-coupled atmospheric pressure plasma. Preliminarily, plasma-poly(ethylene terephthalate) (PET) film interactions with atmospheric pressure capacitively-coupled plasma were studied under closed-ventilation conditions with exposure times of 0-5 min., using He/Air and He/O2 gases. The weight loss (%) increased initially and then decreased at further exposure times in both gas plasma treatments. Contact angle measurements showed that wettability increased rapidly up to 1 min. and was constant at further exposure times. Atomic Force Microscopy (AFM) was used to characterize the surface morphology change of the PET films. Surface functionalization and cross-linking were examined by X-ray Photoelectron Spectroscopy (XPS). Both plasma treatments induced functionalization after chain-scission, and generated etched particles, a potential source for re-deposition. Re-deposition effects on weight loss (%), roughness, carbon content and surface functionality increased with plasma exposure time. Cross-linking was dependent on plasma exposure time and also on helium content. Tensile strength and initial modulus of PET films increased after treatments in both gas plasmas. The contribution of helium was a major factor increasing cross-linking. In order to investigate the effect of atmospheric pressure plasmas on adhesion between aramid fibers and epoxy, aramid fibers were treated with atmospheric pressure helium/air for 15, 30 and 60 seconds on a capacitively-coupled device at a frequency of 5.0 kHz and He outlet pressure of 3.43kPa. SEM analysis at 10,000 x magnification showed that no significant surface morphological change resulted from the plasma treatments. XPS analysis showed a decrease in carbon content and an increase in oxygen content. Deconvolution analysis of C1s, N1s and O1s peaks showed an increase in su.

Author: Miran Mozetič
Publisher: MDPI
ISBN: 3038977969
Category : Technology & Engineering
Languages : en
Pages : 356

Get Book Here

Book Description
This book contains selected contributions on surface modification to improve the properties of solid materials. The surface properties are tailored either by functionalization, etching, or deposition of a thin coating. Functionalization is achieved by a brief treatment with non-equilibrium gaseous plasma containing suitable radicals that interact chemically with the material surface and thus enable the formation of rather stable functional groups. Etching is performed in order to modify the surface morphology. The etching parameters are selected in such a way that a rich morphology of the surfaces is achieved spontaneously on the sub-micrometer scale, without using masks. The combination of adequate surface morphology and functionalization of materials leads to superior surface properties which are particularly beneficial for the desired response upon incubation with biological matter. Alternatively, the materials are coated with a suitable thin film that is useful in various applications from food to aerospace industries.