Materials Literature
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We study an energy functional able to describe low energy configurations of a two dimensional lattice with dislocations in a nonlinear elasticity regime. The main result can be described as follows: configurations of energy comparable to the lattice spacing consist of piecewise constant microrotations with small angle…
NASA is responsible for a number of facilities and structures with metallic structural and nonstructural components in a highly corrosive environment. Metals require periodic maintenance activity to guard against the insidious effects of corrosion and thus ensure that structures meet or exceed design or performance li…
Ces travaux de doctorat se concentrent sur le développement d’une technologie originale et innovante de pile à combustible alimentée directement à l’anode par une solution alcaline contenant de l’hydrazine borane (HB), celui-ci intervenant comme combustible (technologie notée DHBFC pour direct hydrazine borane fuel ce…
Material is needed in life, the material itself is used aims to facilitate human activities, in the development of modified human material in various ways, one of which composite materials. Composite is a combination of two or more elements that get combined properties of the elements combined. Liquid Epoxy resin is a…
Acne is one of the most common skin diseases affecting mostly adolescents, but can occur also into adulthood. Acne can have profound psychological and social effects, not only for high severity acne, but even in less severe cases. Staphylococcus epidermidis (S. epidermidis) bacteria and Propionibacterium acnes (P. acn…
The objective of this research work was dedicated to the preparation of photocatalytic textiles based on graphene (0.5%wt)/TiO2 composite. Four different methods were tested to coat the cotton knit: dipping twice the knit in composite (a); dipping twice the knit in composite and finally in a polyacrylate binder (b); d…
The layer-by-layer (LbL) assembly is a useful technique to fabricate multifunctional thin films by exposing substrates alternatively to cationic and anionic solutions.In this work, branched poly(ethyleneimine) (BPEI) and poly (acrylic acid) (PAA) are two weak polyelectrolytes for multilayer films assembly.The BPEI/PAA…
In society there is a high interest for materials that provide a good answer to many contemporary requirements materials that "stress" the environment as little as possible. In recent years, the international scientific world focused its efforts on developing new ways for obtaining polymers, their diversification, in…
In order to interpret the reason of chromium complexes release from the chrome tanned leather during the neutralizing process, the hide powder was tanned by chromium sulfate liquor with 33% basicity (BCS), and then the tanned collagen was treated by general neutralizing process to obtain neutralizing effluent. Ion exc…
Diabetes is the most common disease in our world. In our country over 50.000 of people are diagnosed with diabetes every year. Diabetes is a metabolic disorder generated by the pancreas inability to produce insulin in order to complete glucose metabolic process. Therefore, the life of the patients is sustained by the…
The aim of this study is to monitor the influence of the addition of glass fibers (GFs) treated with polydimethylsiloxane (PDMS) and aminopropyltrimethoxysilane (APTMS) on processability and mechanical and thermal properties of polypropylene. The composites based on PP/GFs were processed on a twin screw extruder-granu…
Collagen is the most commonly used tissue-derived natural polymer. Collagen gels are widely used in wound dressing materials due to their good degradability, poor antigenicity, excellent biocompatibility and unique fibril forming properties. But, poor mechanical properties of physically formed collagen gels limit thei…
This paper approaches the relationship between obesity and foot disorders, an important topic in designing and producing preventive or palliative strategies to improve the quality of life for the elders. In spite the growth of old people, they are constrained to accept the footwear that the market is offering, which d…
This paper focuses on development and characterization of new impact and flame resistant advanced materials based on polyamide / compatibilizer / polycarbonate / glass fibers (GF) functionalized with organo silane. Polyamides (PA) are highly crystalline hard materials, that have high impact resistance, burn slowly or…
Phase Change Material (PCM) is a substance with a high heat of fusion which melts and solidifies at a certain temperature, being capable of storing and releasing large amounts of thermal energy. This behaviour of PCM is the basis for its temperature regulating effect, as a component of textile functionalized fibres an…
Vulcanizing elastomers is a main step, with a major impact on the final product properties. The amount and type of curing agent, curing time, temperature and pressure are important factors that control the degree of crosslinking and the final properties of the product. The vulcanization system used and required quanti…
Le collagène est un élément majeur de l'architecture des organes chez les mammifères. Cette protéine s'organise en structures tridimensionnelles (3D) spécifiques à chaque tissu et responsables de leurs propriétés biophysiques et biomécaniques. La microscopie multiphoton permet de visualiser le collagène fibrillaire da…
Compounding elastomers and plastics by reactive melt processing in the presence of correct curing systems has led to elastic-plastic alloys with advanced properties. At global scale, however, the new polymeric architectures obtained by dynamic curing, made compatible and reinforced with nanometric particles expand the…
Collagen polydispersions obtained by associated thermal and enzymatic processes for high-yield extraction of collagen from waste, under mild reaction conditions, are fit for application in agriculture. This study presents the possibility of using thermal and enzymatic processes of byproducts from fishing industry to o…
Gait and balance disorders are common in older adults and they are independent predictors for the functional decline resulting in various degrees of disability and loss of independence. Gait disorders have multiple causes, they have a progressive course and may negatively impact the functional performances. Many gait…