Towards a new generation of polymeric foams: PMMA nanocellular foams with enhanced physical properties

Polymer ◽  
2015 ◽  
Vol 63 ◽  
pp. 116-126 ◽  
Author(s):  
B. Notario ◽  
J. Pinto ◽  
M.A. Rodríguez-Pérez
Author(s):  
Shaoqiang Dong ◽  
Zhen Li

In last decades, open-shell organic materials have attracted scientists’ great attention for their new chemical and physical properties, as well as their possible applications in new generation of organic light-emitting...


2014 ◽  
Vol 40 (11) ◽  
pp. 1824-1829 ◽  
Author(s):  
Masaki Tsujimoto ◽  
Yuu Irifune ◽  
Yasuhisa Tsujimoto ◽  
Shizuka Yamada ◽  
Ikuya Watanabe ◽  
...  

2015 ◽  
Vol 19 (sup5) ◽  
pp. S5-250-S5-256 ◽  
Author(s):  
Ruosong Li ◽  
Dan Zeng ◽  
Qinli Liu ◽  
Lu Li ◽  
Tao Fang

2016 ◽  
Vol 04 (01) ◽  
Author(s):  
Carolyn M Primus ◽  
James L Gutmann ◽  
Ron Yapp ◽  
Franklin Tay

2010 ◽  
Vol 9 (2) ◽  
pp. 200
Author(s):  
T. El-Husseinv ◽  
K. Moraitis ◽  
H. Wazait ◽  
M. Birch ◽  
J. Masood ◽  
...  

Nanofluids are new generation of thermo fluids. Researchers are attracted towards their application in various thermal energy systems. Before employing nanofluids in the heat exchangers, it is necessary to ensure superior thermo physical properties of nanofluids. In the present work, different thermo physical properties of nanofluids like thermal conductivity, viscosity, specific heat and density have been studied for a wide range of volume concentration (0.25-2.0 %) and temperature (30-60°C). TiO2 / H2O and CeO2 / H2O nanofluids show good stability for 0.25-2.0 volume %. The temperature range 30-60°C is considered because above 60°C the convection heat transfer may affect the accuracy of measurements. De-ionized water (D.I. water) is considered as base fluid. TiO2 /H2O and CeO2 /H2O nanofluids show superior thermal properties as compared to D.I. water


2012 ◽  
Vol 622-623 ◽  
pp. 259-262 ◽  
Author(s):  
M.R. Banwaskar ◽  
S.N. Dachawar

Graphene is a form of carbon just one atom thick, it has an array of physical properties that promise to revolutionize electronics and other technical fields. Since the first reports of its discovery in 2004, work on graphene has largely stressed understanding the fundamentals of the two-dimensional material over pursuing applications for it. Graphene may become a key enabling material, paving the way for a new generation of high-speed nanoscale electronics with consequences and breakthroughs similar to that of silicon’s in the last few decades. In this paper we present the evolution of this fascinating material, beginning with early observations and moving into the practical applications.


2021 ◽  
pp. 78-84
Author(s):  
Igor Gibin ◽  
Peter Kotlyar

The prospects for the use of single-layer graphene in the design of optical-acoustic converters (OAC) of a new generation are considered. It is shown that the limiting characteristics of transducers with single-layer graphene membranes can be obtained only in OACs constructed according to the Hayes scheme. The main characteristics of membranes – the main elements of OAC – are considered, and the physical properties of graphene, as the most preferred mate-rial for membranes, are analyzed. Estimates having been made show that the use of SLG gra-phene membranes makes it possible to create IR and THz radiation receivers with cells of the order of tens of microns with extremely high sensitivity. To achieve the maximum sensitivity, it is proposed to perform edge perforation of graphene membranes. A new design scheme of uncooled helium-graphene optoacoustic receivers with theoretically maximum sensitivity and speed and an operating range extended to helium temperatures is proposed. The de-scribed technical solutions can be used as the basis for the design of uncooled.


2010 ◽  
Vol 123-125 ◽  
pp. 639-642 ◽  
Author(s):  
Andrzej Cwirzen

The majority of concrete used nowadays is based on matrixes formed by hydrating Portland cement. Latest developments in nanosciences introduced a new generation of nano-sized materials possessing often remarkable mechanical and physical properties. These materials can be also used to improve or alter the characteristics of the binder matrixes based on Portland cement. The results showed that mechanical properties such as compressive and flexural strength can be increased by up to 50% by addition of for example 0.23wt% of carbon nanotubes. Carbon nanotubes and carbon nanofibres and/or nanosilica appeared to improve also the frost resistance. Other properties, such as autogenous shrinkage decreased significantly after addition of carbon nanofibres. Nanosilica enabled an immense densification of the hydrated binder matrix, which in turn improved for instance the durability and mechanical properties.


2019 ◽  
Author(s):  
Sergey Bedenko ◽  
Alexander Karengin ◽  
Nima Ghal-Eh ◽  
Nikita Alekseev ◽  
Vladimir Knyshev ◽  
...  

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