Thermal properties and flammability of nanocomposites based on nitrile rubbers and activated halloysite nanotubes and carbon nanofibers

2012 ◽  
Vol 549 ◽  
pp. 6-12 ◽  
Author(s):  
Przemysław Rybiński ◽  
Grażyna Janowska
Keyword(s):  
Thermal Properties ◽  
Carbon Nanofibers ◽  
Halloysite Nanotubes ◽  
Nitrile Rubbers

Ethylene vinyl acetate copolymer/halloysite nanotubes nanocomposites with enhanced mechanical and thermal properties

2020 ◽  
Vol 137 (38) ◽  
pp. 49135 ◽  
Author(s):  
Agata Zubkiewicz ◽  
Anna Szymczyk ◽  
Sandra Paszkiewicz ◽  
Roman Jędrzejewski ◽  
Elżbieta Piesowicz ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Halloysite Nanotubes ◽  
Mechanical And Thermal Properties ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

Thermal properties of poly (vinyl alcohol)(PVA)/halloysite nanotubes reinforced nanocomposites

2015 ◽  
Vol 19 (1) ◽  
pp. 124-136 ◽  
Author(s):  
Swapna V.P. ◽  
Selvin Thomas P. ◽  
Suresh K.I. ◽  
Saranya V. ◽  
Rahana M.P. ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Vinyl Alcohol ◽  
Halloysite Nanotubes ◽  
Poly Vinyl Alcohol

scholarly journals Thermal Properties of Multilayer Nanocomposites Based on Halloysite Nanotubes and Biopolymers

2018 ◽  
Vol 2 (3) ◽  
pp. 41 ◽  
Author(s):  
Vanessa Bertolino ◽  
Giuseppe Cavallaro ◽  
Stefana Milioto ◽  
Filippo Parisi ◽  
Giuseppe Lazzara
Keyword(s):  
Thermal Properties ◽  
Cellulose Degradation ◽  
Oxidative Degradation ◽  
Middle Layer ◽  
Halloysite Nanotubes ◽  
Hydroxypropyl Cellulose ◽  
Inert Atmosphere ◽  
Scanning Calorimetry ◽  
Dsc Studies ◽  
Kinetics Of

This paper reports a novel procedure to fabricate multilayer composite biofilms based on halloysite nanotubes (HNTs) and sustainable polymers. Among the biopolymers, the non-ionic (hydroxypropyl cellulose) and cationic (chitosan) molecules were selected. The nanocomposites were prepared by the sequential casting of ethanol solutions of hydroxypropyl cellulose and aqueous dispersions of chitosan/HNTs. The composition of the bio-nanocomposites was systematically changed in order to investigate the effect of the hydroxypropyl cellulose/HNTs ratio on the thermal properties of the films, which were investigated by differential scanning calorimetry (DSC) and thermogravimetry (TG). DSC studies were conducted in the static air (oxidative atmosphere), while TG measurements were carried out under nitrogen flow (inert atmosphere). The analysis of DSC data provided the enthalpy and the temperature for the oxidative degradation of the bio-nanocomposites. These results were helpful to estimate the efficacy of the well-compacted middle layer of HNTs as a flame retardant. TG experiments were performed at a variable heating rate and the collected data were analyzed by the Friedman’s method (non-isothermal thermogravimetric approach) with the aim of studying the kinetics of the hydroxypropyl cellulose degradation in the multilayer nanocomposites. This work represents an advanced contribution for designing novel sustainable nanocomposites with excellent thermal behavior as a consequence of their peculiar multilayer structure.

scholarly journals Improvement of mechanical and thermal properties of poly(3-hydroxybutyrate) (PHB) blends with surface-modified halloysite nanotubes (HNT)

2018 ◽  
Vol 162 ◽  
pp. 487-498 ◽  
Author(s):  
Daniel Garcia-Garcia ◽  
David Garcia-Sanoguera ◽  
Vicent Fombuena ◽  
Juan Lopez-Martinez ◽  
Rafael Balart
Keyword(s):  
Thermal Properties ◽  
Halloysite Nanotubes ◽  
Mechanical And Thermal Properties ◽  
Surface Modified

COMPARISON OF THERMAL CONDUCTIVITY FOR HHT-24-CNF-BASED NANOFLUID USING DEIONIZED WATER AND ETHYLENE GLYCOL

2015 ◽  
Vol 77 (21) ◽  
Author(s):  
Syarifah Norfatin Syed Idrus ◽  
Nor Salihah Zaini ◽  
Imran Syakir Mohamad ◽  
Norli Abdullah ◽  
Mohd Haizal Mohd Husin
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Ethylene Glycol ◽  
Carbon Nanofibers ◽  
Deionized Water ◽  
Water Based

Carbon nanofibers (CNF) is one of potential nanoparticles that possess superior thermal conductivity. In this study, nanofluids with suspension of CNF in deionized water (DI water) and ethylene glycol (EG) are prepare. Thermal conductivity (TC) of the nanofluids are measured at 6°C, 25°C and 40°C using KD2 Pro Thermal Properties Analyser. The results show that, TC increases with increasing of temperature and CNF loading. Best TC is recorded by 36.7 % enhancement at 40 °C for EG based fluid with 0.9 wt% CNF loading. Meanwhile, for DI water based fluid, best TC enhancement (39.6 %) can be achieved with CNF loading of 0.7 wt% at 40°C. Overall, both based fluid show a promising enhancement in thermal conductivity. However, DI water based fluid show higher TC in comparison to EG based fluid due to the higher TC in standard DI water itself.

Fabrication and characterization of carbon nanofibers coated expandable thermoplastic microspheres-based polymer composites

2022 ◽  
Vol 05 ◽  
Author(s):  
Wanda Jones ◽  
Bedanga Sapkota ◽  
Brian Simpson ◽  
Tarig A. Hassan ◽  
Shaik Jeelani ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Thermal Properties ◽  
Carbon Nanofibers ◽  
Spherical Particles ◽  
Sonochemical Method ◽  
Thermal And Mechanical Properties ◽  
Polymer Shell ◽  
Composite Foam ◽  
Composite Foams

Background: Thermoplastic expandable microspheres (TEMs) are spherical particles that consist of polymer shell encapsulating a low boiling point liquid hydrocarbon that acts as the blowing agent. When TEMs are heated at 80-190 C, the polymer shell softens and the hydrocarbon gasifies, causing the microspheres expand leading to increase in volume and decrease in density. TEMs are used in food packaging, elastomeric cool roof coatings, shoe soles, fiber and paper board, and various applications in the automotive industry. It is noted that TEMs are known by its brand name ‘Expancel’ which is also used to refer TEMs in this paper. Objective: The objective of this work was to develop and characterize forms prepared from TEMs with/without carbon nanofibers (CNFs) coatings to study the effect of CNFs on structural, thermal, and mechanical properties. Method: Sonochemical method was used to coat TEMs with various weight percentage (1, 2, and 3 %) of CNF. Neat foam (without CNF) and composite foams (TEMs coated with various wt.% of CNF) were prepared by compression molding the TEMs and TEMs-CNF composites powders. Thermal and mechanical properties of the neat and composite foams were investigated. Result: The mechanical properties of the composite foam were notably improved, which is exhibited by a 54% increase in flexural modulus and a 6% decrease in failure strain with the TEMs-(2 wt.% CNF) composite foam as compared to the neat foam. Improvement in thermal properties of composite foam was demonstrated by a 38% increase in thermal stability at 800 ºC with the TEMs-(1 wt.% CNF) composite foam as compared to the neat foam. However, no change in glass transition of TEMs was observed with the CNF coating. SEM-based analysis revealed that CNFs were well dispersed throughout the volume of the TEMs matrix forming a strong interface. Conclusions: Straightforward sonochemical method successfully triggered efficient coating of TEMs with CNFs resulting to strong adhesion interface. The mechanical properties of composite foams increased up to 2% of CNFs coating and then decreased with the higher coating presumably due to interwoven bundles and aggregation of CNFs, which might have acted as critical flaws to initiate and propagate cracking. Thermal properties of foams increased with the CNFs coating while no change in glass transition temperature was observed due to coating.

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