scholarly journals Chemically activated core–shell structured IF-WS2@C nanoparticles enhance sugarcane-based carbon/epoxy nanocomposites

RSC Advances ◽  
2021 ◽  
Vol 11 (59) ◽  
pp. 37112-37119
Author(s):  
Dehua Cao ◽  
Guangsheng Liu ◽  
Wenting Chen ◽  
Xuefeng Lv ◽  
Taize Song ◽  
...  
Keyword(s):  
Epoxy Resins ◽  
Core Shell ◽  
Schematic Diagram ◽  
Epoxy Nanocomposites ◽  
Curing Mechanism ◽  
The Matrix

Schematic diagram and typical curing mechanism of epoxy resins and the unique interactions of the IF-WS2@C nanoparticles introduced into the matrix.

A novel approach to enhance the thermal conductivity of epoxy nanocomposites using graphene core–shell additives

Carbon ◽  
2016 ◽  
Vol 101 ◽  
pp. 239-244 ◽  
Author(s):  
Osman Eksik ◽  
Stephen F. Bartolucci ◽  
Tushar Gupta ◽  
Hafez Fard ◽  
Theodorian Borca-Tasciuc ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Core Shell ◽  
Epoxy Nanocomposites ◽  
Novel Approach

Failure processes governing high-rate impact resistance of epoxy resins filled with core–shell rubber nanoparticles

2015 ◽  
Vol 51 (5) ◽  
pp. 2347-2370 ◽  
Author(s):  
Erich D. Bain ◽  
Daniel B. Knorr ◽  
Adam D. Richardson ◽  
Kevin A. Masser ◽  
Jian Yu ◽  
...  
Keyword(s):  
Epoxy Resins ◽  
Impact Resistance ◽  
High Rate ◽  
Core Shell

Programmable Skins based on Core-Shell Microsphere/Nanotube/Polymer Composites

2015 ◽  
Vol 1800 ◽  
Author(s):  
Balaji Panchapakesan ◽  
Cagdas Onal ◽  
James Loomis
Keyword(s):  
Polymer System ◽  
Liquid Hydrocarbon ◽  
Core Shell ◽  
Stimuli Responsive ◽  
Electrically Conductive ◽  
Dimensional Changes ◽  
Stimuli Responsive Polymers ◽  
Thermally Responsive ◽  
New Findings ◽  
The Matrix

ABSTRACTIn this paper, we describe unique thermally responsive polymer system based on nanotube-elastomers dispersed with core-shell expanding microspheres (phase-change material). Upon thermal or infrared stimuli, liquid hydrocarbon cores encapsulated within the microspheres vaporize, expanding the surrounding shells and stretching the matrix. Microsphere transformation resulted in visible dimensional changes associated with macroscopic volume increase (>500%), reduction in density (>80%), and increase in elastic modulus (>675%). Additionally, electrically conductive nanotubes allowed for expansion dependent electrical responses. We present our new findings on expansion dependent superhydrophobicity in these materials and present some outlook and comparison of our stimuli responsive polymers with other material systems for future origami based applications.

A study of the residual microstress at the matrix interface in filled epoxy resins

1992 ◽  
Vol 32 (10) ◽  
pp. 678-685 ◽  
Author(s):  
Hong-Bing Wang ◽  
Shan-Jun Li ◽  
Hong-Wei Zhou ◽  
Tong-Yin Yu ◽  
Xiao-Wei Jin
Keyword(s):  
Epoxy Resins ◽  
Matrix Interface ◽  
The Matrix

Friction and Wear of Epoxy Composites Containing Silica Nanoparticles Grafted by Hyperbranched Aromatic Polyamide

2012 ◽  
Vol 20 (8) ◽  
pp. 673-682
Author(s):  
Ying Yu ◽  
Min Zhi Rong ◽  
Ming Qiu Zhang
Keyword(s):  
Silica Nanoparticles ◽  
Sliding Wear ◽  
Friction And Wear ◽  
Frictional Coefficient ◽  
Aromatic Polyamide ◽  
Epoxy Composites ◽  
Linear Polymers ◽  
Curing Mechanism ◽  
The Matrix ◽  
Amine Groups

Nano-sized SiO2 particles grafted with hyperbranched aromatic polyamide were employed as fillers for fabricating epoxy based composites. The hyperbranched aromatic polyamide was selected because its terminal amine groups could take part in the curing reaction of epoxy resin and covalently connect silica nanoparticles with the matrix. The experimental results proved the occurrence of this reaction, and indicated that the presence of the grafted SiO2 in epoxy does not change the overall curing mechanism of epoxy. In comparison to the composites filled with untreated nano-SiO2 particles, the composites with the grafted nano-SiO2 exhibited significantly improved sliding wear resistance and reduced frictional coefficient owing to the strong filler/matrix interfacial bonding. Moreover, hyperbranched aromatic polyamide grafted nano-SiO2 was more effective to enhance tribological properties of epoxy than linear polymers grafted versions.

Toughened Epoxy Adhesive Modified with Core-Shell Nanoparticles Containing Epoxy Groups on the Surface

2012 ◽  
Vol 184-185 ◽  
pp. 1375-1379
Author(s):  
Xu Gang Zhang ◽  
Bin Zhang ◽  
Ming Ming Sun ◽  
Jian Hui Li ◽  
Lei Wang ◽  
...  
Keyword(s):  
Epoxy Resins ◽  
Small Scale ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Adhesion Properties ◽  
Epoxy Networks ◽  
Grinding Method ◽  
Toughened Epoxy ◽  
Core Shell Nanoparticles ◽  
Modified Epoxy

The epoxy resins were toughened with reactive core-shell nanoparticles(CSNPs) with butyl acrylate (BA) as the core and methyl methacrylate (MMA) copolymerizing with glycidyl methacrylate (GMA) as the shell. The chemical structure of the CSNPs was characterized by FT-IR. The morphology of toughened epoxy networks were analyzed by SEM and TEM, and their adhesion properties were also detected. The results show that mixing methods and CSNP concentration have great influence on the morphology and adhesion properties of the toughened epoxy networks. CSNPs are uniformly dispersed in the epoxy resins by the grinding method. The modified epoxy networks obtained from the modified epoxy networks prepared by the grinding method(MEPN2) with 10 wt% CSNPs show the best adhesion properties, and the increase in maximum peel strength, 25°C sheer strength and 150°C sheer strength of the modified epoxy networks is 401.3% , 46.9% and 27.6% respectively over the unmodified epoxy networks due to the small-scale coagulations of CSNPs.

Chemiluminescence measurement of gel times for amine-cured epoxy resins

1995 ◽  
Vol 7 (2) ◽  
pp. 219-236 ◽  
Author(s):  
K A Kozielski ◽  
N C Billingham ◽  
G A George ◽  
D C L Greenfield ◽  
J M Barton
Keyword(s):  
Chemical Reactions ◽  
Epoxy Resins ◽  
Physical State ◽  
Glycidyl Ether ◽  
Cross Linking ◽  
Gel Time ◽  
The Matrix ◽  
Effect Of Impurities ◽  
The Cross

The cross-linking reactions of 4,4'-diaminodiphenyl sulphone (DDS) with stoichiometric quantities of glycidyl ether- or tetraglycidyl amine-based epoxy resins were monitored using chemiluminescence (CL) and rheometry. It was found that, when a sample was cured isothermally in air, the CL profile increased to a maximum, then decreased again. The maximum was found to correspond well with the gel time (tgel), as measured by rheometry. This observation is discussed in relation to the chemical reactions occurring within the material and the physical state of the matrix. The effect of impurities in DDS on the gel time of these epoxy resins is reported.

Nanomechanical Properties of Core-Shell Structured Ni@NiO Nanoparticles Reinforced Epoxy Nanocomposites

2014 ◽  
Vol 983 ◽  
pp. 99-102
Author(s):  
Huai Yuan Wang ◽  
Lei Yan ◽  
Yan Ji Zhu ◽  
Hua Song ◽  
Jia Hua Zhu
Keyword(s):  
Elastic Modulus ◽  
Epoxy Resin ◽  
Optimal Concentration ◽  
Core Shell ◽  
Nio Nanoparticles ◽  
Surface Wetting ◽  
Epoxy Nanocomposites ◽  
Nanomechanical Properties ◽  
Nio Nps ◽  
Wetting Method

Epoxy resin (EP) nanocomposites reinforced with different contents of core-shell structured Ni@NiO nanoparticles (NPs) were fabricated by using a surface wetting method. The nanoindentation and nanoscratch properties of Ni@NiO/EP nanocomposites were comparatively studied based on nanoindentation technique. Results revealed that 5 wt.% content of Ni@NiO NPs was the optimal concentration for Ni@NiO/EP composites to obtain the best improvement of nanomechanical properties. In comparison with pristine EP, the highest enhancements of hardness and elastic modulus of 5 wt.% Ni@NiO/EP nanocomposites were increased by 37.8% and 16.3%, respectively.

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