Enhanced mechanical properties of silica nanoparticle-covered cross-linking graphene oxide filled thermoplastic polyurethane composite

2018 ◽  
Vol 42 (4) ◽  
pp. 3069-3077 ◽  
Author(s):  
Hui Ren ◽  
Yuming Zhou ◽  
Man He ◽  
Ran Xu ◽  
Binbin Ding ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Thermoplastic Polyurethane ◽  
Silica Nanoparticle ◽  
Cross Linking ◽  
Simultaneous Reduction ◽  
Polyurethane Composite

In this work, stacking graphene oxide (GOE) and silica nanoparticle-covered cross-linking graphene oxide (GOES) were successfully synthesized by using EDA simultaneous reduction and functionalization GO.

scholarly journals Hyperbranched polyamide modified graphene oxide-reinforced polyurethane nanocomposites with enhanced mechanical properties

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14484-14494
Author(s):  
Yahao Liu ◽  
Jian Zheng ◽  
Xiao Zhang ◽  
Yongqiang Du ◽  
Guibo Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
High Performance ◽  
Cross Linking ◽  
Elongation At Break ◽  
Modified Graphene Oxide ◽  
High Performance Composite ◽  
Modified Graphene ◽  
Polyurethane Nanocomposites ◽  
Hyperbranched Polyamide

We successfully modified graphene oxide with amino-terminated hyperbranched polyamide (HGO), and obtained a high-performance composite with enhanced strength and elongation at break via cross-linking hydroxyl-terminated polybutadiene chains with HGO.

scholarly journals Study of Ratio Variation of Binary Components of Cross Linking Agent on Extent of Polymerization and Mechanical Properties of Polyurethane Composites

2019 ◽  
Vol 31 (11) ◽  
pp. 2537-2542
Author(s):  
A. Sharma ◽  
S.K. Sharma ◽  
A. Rani
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Testing Machine ◽  
Cross Linking ◽  
Component Ratio ◽  
Polyurethane Composite ◽  
Ratio Variation ◽  
Curing Agents ◽  
Butane Diol ◽  
Trimethylol Propane

Polyethylene glycol based polyurethane polymer and its fly ash reinforced polyurethane composite were prepared by optimizing the concentration ratio of binders, cross linking agents and curing agents. The components ratio of cross linking agents with the same hydroxyl functionalities i.e. 1,4-butane diol and 1,1,1-trimethylol propane affects the mechanical properties of polymer. The extent of polymerization of polyurethane matrix and fly ash reinforced polyurethane composite was found to be independent of the component ratio of cross linking agents. PEG based polyurethane polymer and their fly ash-reinforced composite can be synthesized at particular ratio by mass of cross linking agents i.e. 0.5 keeping constant w/w ratio 3:2 of binders and curing agents. Effect of w/w ratio variation of cross linking agents on the extent of polymerization has been studied through SEM technique. Cross linking agents, curing agents and polyurethane composite have been characterized by IR spectra. Effect of w/w ratio variation of binary components 1,4-butane diol and 1,1,1-trimethylol propane of cross linking agents on the mechanical properties of fly ash-reinforced polyurethane composite has been studied by evaluating tensile strength and Young modulus of composite material by universal testing machine. Hardness of fly ash-reinforced polyurethane composite with different ratio of 1,4-butane diol and 1,1,1-trimethylol propane of cross linking agents was evaluated by durometer

scholarly journals Copper-Polyurethane Composite Materials: Particle Size Effect on the Physical-Chemical and Antibacterial Properties

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1934
Author(s):  
Cristian Miranda ◽  
Johanna Castaño ◽  
Emky Valdebenito-Rolack ◽  
Felipe Sanhueza ◽  
Rody Toro ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Composite Materials ◽  
Thermoplastic Polyurethane ◽  
Antibacterial Properties ◽  
Copper Particle ◽  
Copper Particles ◽  
Polyurethane Composite ◽  
Natural Concentration ◽  
Blending Method

In this work, thermoplastic polyurethane (TPU) composites incorporated with 1.0 wt% Cu particles were synthesized by the melt blending method. The effect of the incorporated copper particle size on the antibacterial, thermal, rheological, and mechanical properties of TPU was investigated. The obtained results showed that (i) the addition of copper particles increased the thermal and mechanical properties because they acted as co-stabilizers of polyurethane (PU) (ii) copper nanoparticles decreased the viscosity of composite melts, and (iii) microparticles > 0.5 µm had a tendency to easily increase the maximum torque and formation of agglomerates. SEM micrographics showed that a good mixture between TPU and copper particles was obtained by the extrusion process. Additionally, copper-TPU composite materials effectively inhibited the growth of the Gram-negative Escherichia coli and the Gram-positive Staphylococcus aureus. Considering that the natural concentration of copper in the blood is in the range of 0.7–0.12 mg/L and that the total migration value of copper particles from TPU was 1000 times lower, the results suggested that TPU nanocomposites could be adequately employed for biomedical applications without a risk of contamination.

Enhanced mechanical properties of silanized silica nanoparticle attached graphene oxide/epoxy composites

2013 ◽  
Vol 79 ◽  
pp. 115-125 ◽  
Author(s):  
Tongwu Jiang ◽  
Tapas Kuila ◽  
Nam Hoon Kim ◽  
Bon-Cheol Ku ◽  
Joong Hee Lee
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Silica Nanoparticle ◽  
Epoxy Composites ◽  
Silanized Silica

Borate cross-linking chitosan/graphene oxide films: Toward the simultaneous enhancement of gases barrier and mechanical properties

2015 ◽  
Author(s):  
Ning Yan ◽  
Filomena Capezzuto ◽  
Giovanna G. Buonocore ◽  
Fabiana Tescione ◽  
Marino Lavorgna ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Oxide Films ◽  
Cross Linking

Organophilic graphene nanosheets as a promising nanofiller for bio-based polyurethane nanocomposites: investigation of the thermal, barrier and mechanical properties

2019 ◽  
Vol 43 (39) ◽  
pp. 15659-15672 ◽  
Author(s):  
Mohammed Majdoub ◽  
Younes Essamlali ◽  
Othmane Amadine ◽  
Ikram Ganetri ◽  
Mohamed Zahouily
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Graphene Nanosheets ◽  
Thermoplastic Polyurethane ◽  
Nanocomposite Films ◽  
Thermal Barrier ◽  
Amine Functionalized ◽  
Reduced Graphene ◽  
Polyurethane Nanocomposites ◽  
Long Chain

The present study focuses on the design of new nanocomposite films using bio-based thermoplastic polyurethane (TPU) as a polymer matrix and long chain amine functionalized reduced graphene oxide (G-ODA) as a nanofiller.

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