Significant Enhancement of Thermal Conductivity in Nanofibrillated Cellulose Films with Low Mass Fraction of Nanodiamond

2017 ◽  
Vol 9 (46) ◽  
pp. 40766-40773 ◽  
Author(s):  
Na Song ◽  
Siqi Cui ◽  
Xingshuang Hou ◽  
Peng Ding ◽  
Liyi Shi
Keyword(s):  
Thermal Conductivity ◽  
Mass Fraction ◽  
Nanofibrillated Cellulose ◽  
Significant Enhancement ◽  
Cellulose Films ◽  
Low Mass

Enhanced thermal conductive property of polyamide composites by low mass fraction of covalently grafted graphene nanoribbons

2015 ◽  
Vol 3 (42) ◽  
pp. 10990-10997 ◽  
Author(s):  
Peng Ding ◽  
Nan Zhuang ◽  
Xieliang Cui ◽  
Liyi Shi ◽  
Na Song ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Polymer Matrix ◽  
Mass Fraction ◽  
Graphene Nanoribbons ◽  
Low Mass ◽  
Thermal Contacts ◽  
Conductive Property

Covalently grafted graphene nanoribbons allows for reducing the number of thermal contacts between GNR layers and leading to the more efficient thermal paths in polymer matrix. The result is a 165% enhancement of the thermal conductivity of polyamide composites at a 0.5 wt% of GNR.

scholarly journals Cosmological simulations of low-mass galaxies: some potential issues

2010 ◽  
Vol 6 (S270) ◽  
pp. 503-506
Author(s):  
Pedro Colín ◽  
Vladimir Avila-Reese ◽  
Octavio Valenzuela
Keyword(s):  
Star Formation ◽  
Adaptive Mesh Refinement ◽  
Mass Fraction ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Mesh Refinement ◽  
Adaptive Mesh ◽  
Stellar Mass ◽  
The Galaxy ◽  
Low Mass

AbstractCosmological Adaptive Mesh Refinement simulations are used to study the specific star formation rate (sSFR=SSF/Ms) history and the stellar mass fraction, fs=Ms/MT, of small galaxies, total masses MT between few × 1010 M⊙ to few ×1011 M⊙. Our results are compared with recent observational inferences that show the so-called “downsizing in sSFR” phenomenon: the less massive the galaxy, the higher on average is its sSFR, a trend seen at least since z ~ 1. The simulations are not able to reproduce this phenomenon, in particular the high inferred values of sSFR, as well as the low values of fs constrained from observations. The effects of resolution and sub-grid physics on the SFR and fs of galaxies are discussed.

scholarly journals Measuring intrinsic thickness of rough membranes: application to nanofibrillated cellulose films

2015 ◽  
Vol 50 (21) ◽  
pp. 6926-6934 ◽  
Author(s):  
Arttu Miettinen ◽  
Axel Ekman ◽  
Gary Chinga-Carrasco ◽  
Markku Kataja
Keyword(s):  
Nanofibrillated Cellulose ◽  
Cellulose Films

Enhanced Thermal Conductivity for Graphene Nanoplatelets/Epoxy Resin Composites

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Dahai Zhu ◽  
Yu Qi ◽  
Wei Yu ◽  
Lifei Chen ◽  
Mingzhu Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Epoxy Resin ◽  
Mass Fraction ◽  
Great Influence ◽  
Graphene Nanoplatelets ◽  
Resin Matrix ◽  
Heat Conducting ◽  
Factors Affecting ◽  
Molding Method ◽  
Ep Matrix

Graphene nanoplatelets (GNPs) have excellent thermal conductivity. It can significantly improve the heat-conducting property of epoxy resin (EP) matrix. In this paper, the GNPs/EP composites were successfully prepared by using ultrasonication and the cast molding method. The prepared GNPs/EP composites were systematically characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermal conductivity analyzer. Some factors affecting the thermal transfer performance of the composites were discussed. The defoamation has great influence on the thermal conductivity of composite. There is a nearly linear relationship between the mass fraction and the thermal conductivity of composite when the mass fraction of GNPs is below 4.3%. The results show that when the mass fraction of GNPs is 4.3% with crushing time of 2 s, the thermal conductivity of GNPs/EP composite is up to 0.99 W/m K. The thermal conductivity is increased by 9.0% compared with that without pulverization treatment (0.91 W/m K). When it is ground three times, the thermal conductivity of composite reaches the maximum (1.06 W/m K) and it is increased by 307.7% compared with that of epoxy resin matrix.

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