scholarly journals Nanostructured Bitumen with Nanocarbon

2019 ◽  
Vol 21 (4) ◽  
pp. 317 ◽  
Author(s):  
B.B. Teltayev ◽  
A.A. Kalybai ◽  
G.G. Izmailova ◽  
S.R. Rossi ◽  
E.D. Amirbayev ◽  
...  
Keyword(s):  
Low Temperature ◽  
Test Methods ◽  
Structure Variation ◽  
Temperature Resistance ◽  
Chemical Indicators ◽  
Excess Surface ◽  
The Cost ◽  
Physical And Chemical ◽  
Low Temperature Resistance

Physical and chemical indicators of bitumen quality of grade BND 70/100 with the added carbon nanopowder 2% by weight have been studied by laboratory test methods and analysis. High reaction ability of nanopowder particles and concentration of excess surface and internal energy in them have been determined, which provide the increase of low-temperature resistance, aggregate strength, and improvement of rheological properties of nanostructured bitumen. Essential structure variation has been proved: the increase of asphaltenes and oils content for 9% and 7.2% respectively due to the decrease of resins for 16.2% by weight. Methods have been discussed for preparing a liquid nanocarbon mix, adding of the mix into bitumen and homogenization of the bitumen. Some economic indicators have been represented which influence essentially the reduction for the cost value of the nanostructure bitumen.

Study on Application of the Blends of Nitrile Rubber with Acrylate Rubber in the Coat-Metal Sealing Gasket

2011 ◽  
Vol 393-395 ◽  
pp. 1438-1442 ◽  
Author(s):  
Zu Min Qiu ◽  
Chao Yan Qin ◽  
Jun Ming Qiu
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Heat Resistance ◽  
Nitrile Rubber ◽  
Temperature Resistance ◽  
Oil Resistance ◽  
Comprehensive Properties ◽  
The Cost ◽  
Low Temperature Resistance

This paper discussed the effect of different blending ratio with BNR and ACM on the mechanical properties, heat resistance, low temperature resistance and oil resistance of coat-metal sealing gasket. The result showed that the comprehensive properties of the NBR/ACM blends at the ratio of 85/15 were preferable to the NBR and ACM, the low temperature resistance and oil resistance of NBR are taken into account. The cost of the blends were lower than the ACM. The blends can be used for coat-metal sealing gasket instead of NBR.

scholarly journals Validation of Adhesive and Temperature Property Characteristics of Microsurfacing by Performance-Based Mixture Design Approach

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4532
Author(s):  
Jicun Shi ◽  
Shili Jia ◽  
Lan Wang ◽  
Qing Zhang ◽  
Hongxing Han ◽  
...  
Keyword(s):  
Low Temperature ◽  
Design Method ◽  
Test Methods ◽  
Mixture Design ◽  
Creep Recovery ◽  
Temperature Property ◽  
Temperature Resistance ◽  
Temperature Performance ◽  
Novel Approach ◽  
Low Temperature Resistance

Performance-based mixture design of microsurfacing offers a promising solution to the best application of asphalt emulsions. The presented study investigated a novel approach to evaluate the spalling resistance and high and low-temperature resistance of microsurfacing. The laboratory tests, including mixture bond strength (MBS), driving wheel pavement analyzer (DWPA), multi-stress creep recovery (MSCR), load wheel rutting (LWR), and single edge notch beam (SENB) were conducted to characterize the performance-related properties; the response surface method (RSM) was used to obtain the optimal proportions of the mixture. According to the experimental results, the performance-based mixture design method improves the comprehensive performance of microsurfacing, such as adhesion at high and low temperatures. The results of RSM show that temperature is the most important factor that affects the adhesion of mixture. There is a strong correlation between adhesive and temperature performance detected by different test methods. Due to different chemical mechanisms caused by cement and emulsified asphalt, the high-temperature performance index of the microsurfacing mixture is lower than that of HMA. Furthermore, the low-temperature resistance is analyzed and suggested indicator is proposed.

Highly Tough, Freezing-Tolerant, Healable and Thermoplastic Starch/Poly(vinyl alcohol) Organohydrogels for Flexible Electronic Devices

2021 ◽  
Author(s):  
Jing Lu ◽  
Jianfeng Gu ◽  
Oudong Hu ◽  
Yunhan Fu ◽  
Dezhan Ye ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electronic Devices ◽  
Future Generation ◽  
Thermoplastic Starch ◽  
Poly Vinyl Alcohol ◽  
Temperature Resistance ◽  
Large Application ◽  
Conductive Hydrogels ◽  
Low Temperature Resistance ◽  
Application Prospects

The conductive hydrogels have found large application prospects in fabricating flexible multifunctional electronic devices for future-generation wearable human-machine interactions. However, the inferior mechanical strength, low temperature resistance, and non-recyclability induced...

APPLICATION OF THE PUMPKIN POMACE POWDER IN ENRICHED CRACKER TECHNOLOGY

2019 ◽  
Author(s):  
Н.М. ДЕРКАНОСОВА ◽  
И.И. ЗАЙЦЕВА ◽  
А.А. ЕМЕЛЬЯНОВ ◽  
Т.В. ПОНОМАРЕВА ◽  
А.А. СТАХУРЛОВА ◽  
...  
Keyword(s):  
Dietary Fiber ◽  
Optimization Method ◽  
Mathematical Planning ◽  
Chemical Indicators ◽  
Organoleptic Characteristics ◽  
Autolytic Activity ◽  
Physical And Chemical ◽  
Interstate Standard ◽  
Β Carotene

Рассмотрены аспекты применения вторичного продукта сокового производства – выжимок из тыквы, полученных конвективным вакуумным высушиванием при температуре, не превышающей 50°С, в качестве обогащающего пищевыми волокнами сырьевого ингредиента рецептуры крекера. Дана характеристика высушенных выжимок из тыквы сорта Мускатная. Приведены результаты исследования влияния порошка из выжимок тыквы дисперсностью от 63 до 125 мкм на хлебопекарные свойства муки – количество и качество клейковины, автолитическую активность. Обоснование рецептуры крекера с повышенным содержанием пищевых волокон и β-каротина проведено методом математического планирования – полный факторный эксперимент 22 с последующей оптимизацией методом ридж-анализа. Разработана производственная рецептура. Апробация разработанной рецептуры показала, что крекер с выжимками из тыквы в количестве 11,34 г/100 г муки имеет отличительные органолептические характеристики, обусловленные привкусом и ароматом тыквы, по физико-химическим показателям соответствует требованиям межгосударственного стандарта, по составу, г/100 г, пищевых волокон (3,4) и β-каротина (2,9) может быть отнесен к продукту – источнику пищевых волокон с высоким содержанием β-каротина. The aspects of the use of the secondary product of juice production – pumpkin pomace obtained by convection vacuum drying at a temperature not exceeding 50°C, as an enriching raw ingredient of the cracker formulation with food fibers are considered. The characteristics of dried pumpkin pomace of Muscatnaya variety are given. The results of the study of the influence of pumpkin pomace powder dispersion from 63 to 125 microns on the baking properties of flour – the quantity and quality of gluten, autolytic activity are adduced. The substantiation of the cracker formulation with high content of dietary fibers and β-carotene was carried out by the method of mathematical planning – a complete factorial experiment 22 with subsequent optimization method by ridge analysis. The production formulation is developed. Approbation of the developed formulation showed that the cracker with pumpkin extracts – 11,34 g/100 g of flour has distinctive organoleptic characteristics due to the taste and aroma of pumpkin, on physical and chemical indicators meets the requirements of the interstate standard, by composition, g/100 g, dietary fiber (3,4) and β-carotene (2,9) can be attributed to the product – a source of dietary fiber with a high content of β-carotene.

Photosynthesis and antioxidant metabolism modulate the low-temperature resistance of seed germination in maize

2021 ◽  
Author(s):  
Aiju Meng ◽  
Daxing Wen ◽  
Chunqing Zhang
Keyword(s):  
Seed Germination ◽  
Low Temperature ◽  
Temperature Stress ◽  
Seedling Growth ◽  
Low Temperature Stress ◽  
Maize Seed ◽  
Down Regulation ◽  
Antioxidant Metabolism ◽  
Temperature Resistance ◽  
Low Temperature Resistance

Spring maize is usually subjected to low-temperature stress during seed germination, which retards seedling growth even if under a suitable temperature. However, the mechanism underlying maize seed germination under low-temperature stress modulating seedling growth after being transferred to normal temperature is still ambiguous. In this study, we used two maize inbred lines with different low-temperature resistance (SM and RM) to investigate the mechanism. The results showed that the SM line had higher lipid peroxidation and lower total antioxidant capacity and germination percentage than the RM line under low-temperature stress, which indicated that the SM line was more vulnerable to low-temperature stress. Further transcriptome analysis revealed that seed germination under low-temperature stress caused down-regulation of photosynthesis related gene ontology (GO) terms in two lines. Moreover, the SM line displayed down-regulation of ribosome and superoxide dismutase (SOD) related genes, whereas genes involved in SOD and vitamin B6 were up-regulated in the RM line. Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis revealed that photosynthesis and antioxidant metabolism related pathways played important roles in seed germination in response to low-temperature stress, and the photosynthetic system displayed a higher damage degree in the SM line. Both qRT-PCR and physiological characteristics experiments showed similar results with transcriptome data. Taken together, we propose a model for maize seed germination in response to low-temperature stress.

scholarly journals COMPARATIVE ANALYSIS OF LOW TEMPERATURE RESISTANCE FOR NANOCARBON AND OTHER BITUMENS

2020 ◽  
Vol 5 (443) ◽  
pp. 89-96
Author(s):  
Zhurinov M.Zh., ◽  
◽  
Teltayev B.B., ◽  
Kalybay A.A., ◽  
Rossi C.O., ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Low Temperature ◽  
Polyphosphoric Acid ◽  
Crumb Rubber ◽  
Petrochemical Plant ◽  
Short Term ◽  
Temperature Resistance ◽  
Coal Rock ◽  
Low Temperature Resistance

A comparative analysis of the low temperature resistance for a nanocarbon bitumen and other 30 neat and modified bitumens has been performed in the work. The stiffness at the temperatures of -24°С, -30°С and -36°С under technical system Superpave has been accepted as an indicator of low temperature resistance of the bitumens. The stiffness of the bitumens has been determined on a bending beam rheometer (standard ASTM D 6648-08). Before testing the bitumens have been subjected to the double artificial aging: short-term aging – under standard AASHTO Т 240-13 and long-term aging – under standard ASTM D 6521-08. The nanocarbon bitumen has been prepared in the laboratory of the Kazakhstan Highway Research Institute (KazdorNII) with the use of a road bitumen of the grade BND 70/100 produced by the Pavlodar petrochemical plant (PNHZ) and a nanocarbon powder (2% by weight) manufactured from a coal rock of the deposit “Saryadyr” “Corporation “ON-Olzha” LLP, Akmola region, Kazakhstan). The nanocarbon powder (150-200 nm) has been manufactured by three-stage size reduction of the coal rock: I – a mechanical dispergator (up to 2-3 mm), II – an aerodynamic mill (up to 20 mcm), III – a reactor with a rotating electromagnetic field. The neat bitumens of the grades BND 50/70, BND 70/100, BND 100/130 have been produced by the plants of Kazakhstan and Russia; they satisfy the requirements of the standard ST RK 1373-2013. The modified bitumens have been prepared in the laboratory of KazdorNII with the use of the neat bitumens, 7 types of the polymers, crumb rubber and polyphosphoric acid and they satisfy the requirements of the standard ST RK 2534-2014. It has been determined that the nanocarbon bitumen is one of the most resistant at the low temperatures: -24°С, -30°С and -36°С.

Sign in / Sign up

Export Citation Format

Share Document