Smart ulvan films responsive to stimuli of plasticizer and extraction condition in physico-chemical, optical, barrier and mechanical properties

2020 ◽  
Vol 150 ◽  
pp. 714-726 ◽  
Author(s):  
Mariem Guidara ◽  
Hela Yaich ◽  
Sonda Benelhadj ◽  
Yao Desire Adjouman ◽  
Aurore Richel ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Extraction Condition ◽  
Optical Barrier ◽  
Physico Chemical

Physico-chemical and mechanical properties of organic-inorganic composites

2015 ◽  
Vol 37 (4) ◽  
pp. 369-374
Author(s):  
G.I. Khovanets’ ◽  
◽  
Y.G. Medvedevskikh ◽  
V.P. Zakordonskiy ◽  
V.V. Kochubey ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Inorganic Composites ◽  
Physico Chemical

scholarly journals Mechanical Properties of U-Cu Intermetallic Compound Measured by Nanoindentation

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2215 ◽  
Author(s):  
Ruiwen Li ◽  
Chuan Mo ◽  
Yichuan Liao
Keyword(s):  
Mechanical Properties ◽  
Intermetallic Compound ◽  
Chemical Properties ◽  
Element Distribution ◽  
Treatment Temperature ◽  
Diffusion Method ◽  
Vacuum Furnace ◽  
Young’S Moduli ◽  
Pressure Diffusion ◽  
Physico Chemical

The physico-chemical properties of the Uranium intermetallic compound are of technological importance for improvement of the safety and compatibility of nuclear engineering systems. Diffusion couple samples with U and Cu were assembled and U-Cu intermetallic compounds were fabricated at interface by hot pressure diffusion method at a treatment temperature of 350 °C to 650 °C and at a pressure of 168 MPa in a vacuum furnace. The microstructure and element distribution of the compound phase have been studied by means of SEM, EDS, and XRD. The result showed that a new phase was developed to a thickness of approximately 10 μm with a ration of U:Cu with 1:5. Mechanical properties such as elastic moduli and hardness of the compound have been studied by means of nanoindentation. The nanoindentation testing on sample indicated that hardness of Uranium intermetallic compound are higher than that of metal U and Cu. Uranium intermetallic compound and U have a Young’s moduli with 121 GPa, 160 GPa respectively. The elastic/plastic responses of U-Cu intermetallic compound and U under nanoindentation tests were also discussed in detail.

Physico Chemical Characterization of Nanofibrous Poly(Ε-Caprolactone) Electrospun Templates for Cell Adhesion

MRS Advances ◽  
2017 ◽  
Vol 2 (49) ◽  
pp. 2689-2694
Author(s):  
Karla A. Gaspar-Ovalle ◽  
Juan V. Cauich-Rodriguez ◽  
Armando Encinas
Keyword(s):  
Mechanical Properties ◽  
Differential Scanning Calorimetry ◽  
Cell Adhesion ◽  
Tensile Modulus ◽  
Chemical Characterization ◽  
Mechanical Analysis ◽  
Scanning Calorimetry ◽  
Water Contact ◽  
Physico Chemical ◽  
Static Water

ABSTRACTNanofibrous mats of poly ε-caprolactone (PCL) were fabricated by electrospinning. The nanofiber structures were investigated and characterized by scanning electron microscope, differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, static water-contact-angle analysis and mechanical properties. The results showed that the nanofibrous PCL is an ideal biopolymer for cell adhesion, owing to its biocompatibility, biodegradability, structural stability and mechanical properties. Differential scanning calorimetry results showed that the fibrous structure of PCL does not alter its crystallinity. Studies of the mechanical properties, wettability and degradability showed that the structure of the electrospun PCL improved the tensile modulus, tensile strength, wettability and biodegradability of the nanotemplates. To evaluate the nanofibrous structure of PCL on cell adhesion, osteoblasts cells were seeded on these templates. The results showed that both adhesion and proliferation of the cells is viable on these electrospun PCL membranes. Thus electrospinning is a relatively inexpensive and scalable manufacturing technique for submicron to nanometer diameter fibers, which can be of interest in the commodity industry.

scholarly journals Advanced Techniques of Saponite Recovery from Diamond Processing Plant Water and Areas of Saponite Application

Minerals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 549 ◽  
Author(s):  
Valentine Chanturiya ◽  
Vladimir Minenko ◽  
Dmitriy Makarov ◽  
Olga Suvorova ◽  
Ekaterina Selivanova
Keyword(s):  
Mechanical Properties ◽  
Process Water ◽  
Processing Plant ◽  
Plant Water ◽  
Electrochemical Separation ◽  
Arkhangelsk Region ◽  
Physico Chemical ◽  
Processing Plants ◽  
Diamond Processing

Methods of cleaning and processing of saponite-containing water from diamond processing plants in the Arkhangelsk region, Russia, are discussed. The advantages of electrochemical separation of saponite from process water enabling to change its structural-texture, physico-chemical and mechanical properties are demonstrated. Possible areas of saponite and modified-saponite products application are considered.

New Applications of Tire Powder Recycled by Micro-Waves

2020 ◽  
Vol 1012 ◽  
pp. 84-88
Author(s):  
Moises A. Canazza ◽  
Sandra R. Scagliusi ◽  
Hélio Wiebeck
Keyword(s):  
Mechanical Properties ◽  
Polymeric Materials ◽  
Elongation At Break ◽  
Rubber Powder ◽  
Physico Chemical ◽  
Elastomeric Materials ◽  
International Laws ◽  
Object Of Study ◽  
New Applications ◽  
Butadiene Styrene

In order to minimize impacts caused to environment and to save natural resources, especially from non-renewable sources, recycling of polymeric materials has been object of study. In this scenery, are included elastomeric materials, such as rubber, especially used in tires manufacturing, considering that pneumatic industry consumes around 60% of rubber production. Taking into account that final tires destination is a requirement based on norms and national and international laws, this work aims to the development of a study on the efficacy of micro-wave irradiation in the process of de-vulcanization of tire powder to be used in recycling. Tire powder was subjected to micro-wave irradiation and further merged to SBR (butadiene-styrene rubber) polymeric matrix, at 5, 15, 25 phr; after mixture, resulting compound was characterized for evaluation of physico-chemical and mechanical properties. For the assessment of all samples containing SBR and rubber powder there were applied following essays: Infra-red spectroscopy (FTIR), Tensile strength and elongation at break, Swelling Index. It was verified higher values for mechanical properties imparted by an increased quantity of rubber powder incorporated to SBR matrix.

scholarly journals Preparation of Asphalt Concretes by Gyratory Compactor: A Case of Study with Rheological and Mechanical Aspects

2020 ◽  
Vol 10 (23) ◽  
pp. 8567
Author(s):  
Paolino Caputo ◽  
Pietro Calandra ◽  
Rosolino Vaiana ◽  
Vincenzo Gallelli ◽  
Giovanni De Filpo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Activation Energy ◽  
Energy Savings ◽  
Tensile Deformation ◽  
Environmental Issues ◽  
Exponential Factor ◽  
Air Voids ◽  
Chemical Mechanisms ◽  
Physico Chemical ◽  
Indirect Tensile

For asphalt concrete preparation in laboratory mix-design operations, bitumens are usually mixed with micrometer-sized particles (filler), sand and centimeter-sized crushed stones in a gyratory press at a temperature of about 140–155 °C depending on the bitumen viscosity, until adequate homogenization and compaction take place (air voids optimum). This requires energy consumption. To minimize it, the process needs to be optimized and is usually made empirically. The aim of this manuscript is to gain a comprehension of the physico-chemical mechanisms involved in the process by exploring: (i) the rheological properties (viscosity, activation energy) of a neat and RTFOT-aged bitumen, in presence and in absence of a filler, (ii) the volumetric and resistance behavior under the compaction in a standard Gyratory Compactor (GC) of their blends with aggregates and (iii) the mechanical properties (Indirect Tensile Strength, compression and tensile deformation) of the final products. Correlations between activation energy and pre-exponential factor of the viscosity on a side, and between viscosity, workability and final mechanical properties on the other side allowed to provide a rational interpretation of the physico-chemical processes involved in the framework of the physics of complex fluids. The scientific clues will be of help in optimizing the workability in asphalt concretes productions with obvious repercussions in terms of energy savings, useful for economic and environmental issues.

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