Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A Doctoral Thesis. Submitted in partial fulfillment of the requirements for the award of Doctor of Philosophy of Loughborough University.
TEMPO-mediated oxidation is a powerful technique for preparation of highly crystalline, individualized cellulose nanofibers.This regioselective oxidation can be achieved with sodium hypochlorite and catalytic amounts of 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) and sodium bromide under aqueous conditions at…
In the real conditions in use at 130°C, the water end tank can degrade when exposed to anti-frozen liquid (mixture of water and glycol). The purpose of this thesis is to describe the aging mechanism of the composite, composing the water end tank, exposed to anti-frozen liquid. The approach consisted in studying the PA…
The goal of the gelatin manufacturer is to partial hydrolyze the covalent cross-linkages that organize the collagen molecules into a quarter staggered arrangement found in connective tissue, to minimize the hydrolysis of the peptide bonds and to obtain the appropriate molecular weigh distribution (MWD) for a specific…
For paper producers, an understanding of the development of strength properties in the paper is of uttermost importance. Strong papers are important operators both in the traditional paper industry as well as in new fields of application, such as fibre-based packaging, furniture and light-weight building material. In…
The chip shape – besides the cutting forces, tool wear and surface roughness – is one of the most commonly used criteria for the evaluation of the machinability. The importance of the chip shape can be explained by its strong influence on process reliability. In consequence an automation of cutting operations is only…
The environmental stability of a metal / polymer interface is essential for the durability and mechanical stability of constructions in several important areas such as the automotive, offshore, building and aerospace industries. The protective capability of a polymer film is strongly connected to its barrier propertie…
The purpose of this study was to investigate the effect of nano ceramic fiber fillers on the physical properties of VST-50HD silicone maxillofacial prosthesis. Nano alumina fibers at 2 percent, 4-percent, and 6-percent wt were mixed into the VST-50HD silicone elastomer (Factor II Inc., Lakeside, AZ), a commercially-av…
Surface-enhanced Raman spectra of methylene blue (MB) at different concentrations in silver colloid were obtained. The results indicate that the physical adsorption is dominant at high concentration while the chemical adsorption is the main fashion at relatively low concentration; there are different adsorption orient…
Nowadays the recent growing interest for nanotechnology leads us to want to understand the materials at nano-scale. This thesis aims to deepen into the materials mechanical properties from a molecular point of view. Molecular Dynamics (MD) is the simulation tecnique that is going to be used to understand molecules beh…
The purpose of this thesis was to study how material properties affect the electric field distribution in medium voltage underground cable accessories. A termination and a joint are two common types of products used with underground cables. The basics of the electric field and field distribution in underground cables…
Cr(VI) based conversion coatings are currently the treatments of choice for aluminium alloys to prevent corrosion, and are widely used in the aerospace industry also because of their good electrical conductivity and because they are good primers for paints and adhesives. Hexavalent chromium though is harmful for human…
The primary objectives of this study were the identification and measurement of diatom genera and species making up the diatom communities in the plankton of the Strait of Georgia/Juan de Fuca Strait system, and factors influencing their distributional ecology. The planktonic diatom communities at depths of one, 25, 5…
I dette doktorgradsarbeidet har vi studert hudens evne til å binde vann og hvordan dette påvirker hudens elektriske egenskaper. Vi har også introdusert en helt ny byggestein – memristoren – i bioelektrisk modellering, noe som åpner for en helt ny måte å beskrive bioelektrisitet på.\nMengden av vann i huden er den vikt…
Since more than 50 years, the gold standard in synthetic vascular prostheses has been represented by polyethylene terephtalate (PET, Dacron) and expanded polytetrafluoroethylene (ePTFE). These polymers perform well as sustitutes of large-caliber vessels, however, their long-term patencies are disappointing in small-ca…
Ceramic pebbles are foreseen to be used as tritium breeder in helium cooled pebble bed blankets in fusion reactors. The pebbles are subject to high temperature and irradiation. They may fail during thermomechanical loading. Failure of pebbles will influence the macroscopic thermomechanical response of pebble beds. Fra…
Thermal Barrier Coatings (TBCs) were introduced to reduce operating temperatures and thermal stresses in structures and machine components across a wide range of industries and applications more than 40 years ago, and within the last 15 years their use in various high temperature applications has increased dramaticall…
PVC: Reaching for Sustainability (2008), Mark Everard, PhD, IOM Communications Ltd, London, United Kingdom. Available through the British Plastics Federation, London. 269 pages, £30.00, ISBN 978-1-86125-170-1IntroductionThere are technical books written for audiences of insiders from many industries and professions. T…
L objectif de cette thèse est l élaboration de composites alumine zircone pour application orthopédique (réalisation de têtes fémorales), par une méthode colloïdale, qui permet de maîtriser la distribution et la taille des grains de zircone. Une partie importante de ce travail concerne l élaboration de la poudre compo…
A study of heat exchanger tube wear has been completed. A simple theoretical model of elastic/plastic deformation has been developed and used in a new model of wear. Experimental results were used to corroborate the theoretical developments. A literature survey of wear mechanisms and wear models was conducted to provi…