Temperature stability

In comparison with fiber-reinforced polymer (FRP) composite, the textile-reinforced concrete (TRC) presents stability in mechanical performance at elevated temperatures thanks to a thermal protection layer by the cementitious matrix. This paper presents the experimental characterization and analytical modeling for fire performance of carbon TRC under the thermomechanical regime at constant tensile force.

12p vifilm 24-09-2024 3 1   Download

In the present study, we have made an attempt to prepare complexed PVA-PVP-KNO3-BaTiO3 blend composite polymer electrolyte membranes composed of potassium nitrate (KNO3) as salt and BaTiO3 of various concentrations as filler and studied their properties. The advantages of addition the fillers are the increase in ionic conductivity at room temperatures and the improvement of the stability at the interface with electrodes.

12p dianmotminh02 03-05-2024 11 2   Download

The main aims of this research are: To determine the phase inversion temperatures for the formation of oil-in-brine nanoemulsions at various salt concentrations using conductivity measurements; To prepare the nano-emulsions at PIT points, and study their stability by measuring their droplet size, polydispersity and size distribution using dynamic light scattering technique; To confirm the DLS results using Cryo-SEM technique;...

324p runthenight07 01-03-2023 7 4   Download

This study focuses on the stability of nano-emulsions produced by phase inversion temperature method using n-Decane and n-Dodecane as the dispersed phase and pure water/brine as the aqueous phase (continuous phase). A non-ionic surfactant (Brij 30) was used in the preparation of the nano-emulsions. Three different types salt namely \(NaCl\), \(KCl\) and \(MgC{l_2}\) were used at different concentrations.

173p runthenight07 01-03-2023 3 3   Download

In this Masters thesis computational modelling techniques were employed to investigate iron-free apo-Lactoferrin (apo-Lf) structural conformation changes in the presence of variant temperature and pH. These conditions represent the environment most milk protein goes through in food processing and the production of food products.

162p runthenight04 02-02-2023 7 2   Download

The aim of the work "Activated carbon derived from rice husk by NaOH activation and its application in supercapacitor" is to prepare a low-cost, high specific surface area activated carbon with microporous and mesoporous ranges using rice husk as the raw material. The effects of activation temperature on the specific surface area, pore structure, morphology and thermal stability of the AC samples have been examined. The AC samples were proved to be excellent electrode material for supercapacitor, hence solve the disposal and pollution problems of rice husk.

9p runordie3 27-06-2022 12 3   Download

Bài báo trình bày một thuật toán dự báo mù và sương mù trước 24 giờ cho khu vực sân bay quốc tế Nội Bài bằng phương pháp hồi quy và phân lớp. Thuật toán dự báo phụ thuộc các chỉ số FSI (Fog Stability Index), Fog Threat (Fog Potential), Fog Point (Fog formation temperature) và lớp nghịch nhiệt ở độ cao 1000 - 800mb tương ứng cao độ từ sát bề mặt đến độ cao khoảng 1500m.

14p trinhthamhodang1219 07-05-2021 24 0   Download

The equation of state, the absolute stability temperature of crystalline state and the melting temperature for N2, CO, CO2 and N2O molecular cryocrystals under pressure are determined using the statistical moment method and are compared with the experimental data and other calculations.

9p tamynhan8 04-11-2020 10 1   Download

The catalyst 7.5% NiO/TiO2 and seven samples of NiO/γ-Al2O3 with NiO content from 7.5% to 60% have been obtained and studied. Physico-chemical characteristics of the catalysts were determined by methods of Adsorption (BET), X-ray Diffraction (XRD), TemperatureProgrammed Reduction (TPR) and Hydrogen Pulse Titration. The catalytic properties of the obtained samples were investigated in the reaction of CO methanation at temperatures 180 – 220◦C and mole ratios hydrogen/carbon monoxide 25-100.

16p 12120609 01-06-2020 6 1   Download

MYRRHA is a multi-purpose research reactor able to operate in sub-critical and critical modes and currently in the design phase at SCK•CEN. The choice of LBE was driven by its chemical stability, low melting temperature, high boiling point, low chemical reactivity with water and air and a good neutronic performance.

9p christabelhuynh 29-05-2020 16 1   Download

Growth of the volumes of dangerous and critical welded metal structures constructed under low temperatures imposes additional requirements on the mechanical properties of the weld joints, particularly, on the impact resistance of the weld joint and on the stability of its values.

8p tohitohi 19-05-2020 11 0   Download

In this summary, we briefly review the recent studies focused on the structure and mechanical behavior of HEAs, covering the important issues from phase stability to elastic modulus, mechanical strength, hardness and fatigue resistance. Finally, we highlight a few key findings recently reported for HEAs and discuss the outstanding issues yet to be resolved.

20p tohitohi 19-05-2020 10 2   Download

(BQ) In the study, temperature measurements have been made for Ti–6Al–4V workpieces with various duty factors to clarify the essential causes of difficulty in machining titanium alloys and observe the optimal duty factor in terms of productivity and quality.

7p xuanphuongdhts 27-03-2017 48 3   Download

Nanostructured Au-Ceria has been known as a promising catalyst for the low-temperature water-gas shisft reaction. The catalyst prepared by coprecipitation method with the gold loading various between 2 - 3 at.% with the crystallite size of 2.9 nm has been used to study some factors that effect to catalytic activity and long-term stability of this material.

5p uocvong04 24-09-2015 39 2   Download

At the present, in order to increase octan number the izomerization of hydrocarbon has been studied in the world. Amongs metals and metal oxides on carriers, Pt on the alumina carrier is used most widely owing to the advantages such as thermal stability, high activity and high selectivity etc. The conversion and selectivity of the izomerization depend on the catalysts (the composition of the catalysts, the structure of the carriers, the distribution of metal, the acidity, the catalytic activity of the catalysts) and the reaction condition (temperature, volume flow, carrier gases ...).

4p uocvong04 24-09-2015 62 4   Download

The composition and stability complex between cerium(III) and L. Tryptophan have been studied by pH meter titration method at the temperature of 20o C±0.5, and ionic strength of 0.1 (KCl) solution. The first stability constant of this complex has been calculated. This complex has been isolated at solid state. Its structure was determided by thermal composition and IR spectra methods.

5p uocvong03 24-09-2015 63 3   Download

Titanium oxide ST01, ST31, TiO2 catalysts modified by V5+, N2+ and supported on MCM41 and SiO2 have been used for photooxidation of p-xylene in gas phase. Physicochemical properties of catalysts were determined by the methods of BET Adsorption, Xray Diffraction (XRD), UV-Vis spectroscopy, and atom adsorption spectroscopy (AAS) methods. The photocatalytic activity of catalysts were determined after thermal treatment as well as UV lighting. The common observation is that the higher temperature of treatment the lower conversion of p-xylene obtained.

11p uocvong02 24-09-2015 55 6   Download

Vietnam belongs to the region of tropical climate with high temperature and moisture, especially very high violete radiation exposure. Under these conditions the properties of elastomeric alloys made from waste rubber powder and polypropylene using peroxide as an initiator were messured. Using the dynamic stabilizing method the influence of the composition and the nature of the components on the alloy stability was estimated.

4p uocvong02 24-09-2015 39 2   Download

In 1998, it was first reported that a silica material with large, uniform mesopores arranged into a two-demensional hexagonal structure is synthesized using triblock copolymer and oligomer templates poly (ethylene oxide), (EO)n. This silica was denoted SBA-15. Up to now, it is believed that ordered mesopores of SBA-15 are connected through complementary pores (microporores and small mesopores) in the siliceous pore walls. SBA-15 can be readily synthesized using cheap materials and it shows attractive structural properties, very good hydrothemal stability.

5p uocvong01 24-09-2015 77 3   Download

The thermal stabilityofperoxidase fromleavesof theAfrican oil palm treeElaeis guineensis(AOPTP) at pH 3.0 was studied by differential scanning calorimetry (DSC), intrinsic fluorescence, CD and enzymatic assays.The spectral parameters asmonitoredby ellipticity changes in the far-UV CD spectrum of the enzyme as well as the increase in tryp-tophan intensity emission upon heating, together with changes in enzymatic activity with temperature were seen to be good complements to the highly sensitive but integral methodofDSC....

7p research12 29-04-2013 45 3   Download