Simultaneous enhancement of thermal conductivity and flame retardancy for epoxy resin thermosets through self‐assemble of ammonium polyphosphate surface with graphitic carbon nitride

2019 ◽  
Vol 30 (9) ◽  
pp. 2468-2479 ◽  
Author(s):  
Yang Leng ◽  
Miao‐Jun Xu ◽  
Yue Sun ◽  
Run‐Xu Han ◽  
Bin Li
Keyword(s):  
Thermal Conductivity ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Ammonium Polyphosphate ◽  
Graphitic Carbon Nitride

scholarly journals Core-Shell Graphitic Carbon Nitride/Zinc Phytate as a Novel Efficient Flame Retardant for Fire Safety and Smoke Suppression in Epoxy Resin

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 212 ◽  
Author(s):  
Weiwei Zhang ◽  
Weihong Wu ◽  
Weihua Meng ◽  
Weiya Xie ◽  
Yumeng Cui ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Fire Safety ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Smoke Suppression ◽  
Core Shell ◽  
Cone Calorimetry

Novel core-shell graphitic carbon nitride/zinc phytate (g-C3N4/PAZn) flame retardant was simple synthetized using two-dimensional g-C3N4 and bio-based PAZn by self-assembly and incorporated into epoxy resin (EP) for improving the fire safety. The flame retardance and smoke suppression were investigated by cone calorimetry. The results indicated that g-C3N4/PAZn-EP displayed outstanding flame retardancy and smoke suppression, for example, the peak heat release rate and peak smoke production rate decreased by 71.38% and 25%, respectively. Furthermore, the flame retardancy mechanism was further explored by char residue and thermal stability analysis. It can be predicted that g-C3N4/PAZn will provide valuable reference about bio-based flame retardant.

scholarly journals Synergistic effect of flame retardants and graphitic carbon nitride on flame retardancy of polylactide composites

2020 ◽  
Vol 31 (7) ◽  
pp. 1661-1670 ◽  
Author(s):  
Xianwu Cao ◽  
Xiaoning Chi ◽  
Xueqin Deng ◽  
Tao Liu ◽  
Bin Yu ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Flame Retardancy ◽  
Flame Retardants ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride

scholarly journals Thermal Conductivity of Graphitic Carbon Nitride Nanotubes: A Molecular Dynamics Study

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Hui Guo ◽  
Chunqing Huo ◽  
Liang Yang ◽  
Shiwei Lin
Keyword(s):  
Thermal Conductivity ◽  
Molecular Dynamics ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Nonequilibrium Molecular Dynamics ◽  
Arc Length ◽  
Temperature Changes ◽  
Different Temperatures ◽  
Thermal Conductivity Variation

Graphitic carbon nitride (g-C3N4) nanotubes are recently gaining increasing interest due to their extraordinary physicochemical properties. In the following, we report on simulations using a method of nonequilibrium molecular dynamics and focus on the thermal conductivity variation of g-C3N4 nanotubes with respect to different temperatures, diameters, and chiral angles. In spite of the variation of diameters and chiral angles, the structure of nanotubes possesses high stability in the temperature range from 200 K to 600 K. Although there is little change of the thermal conductivity per unit arc length for nanotubes with the same diameter at different temperatures, it decreases significantly with increasing diameters at the same temperature. The thermal conductivity at different chiral angles has little to do with how temperature changes. Simulation results show that the vibrational density of states of nanotubes distributed, respectively, at ∼11 THz and ∼32 THz, indicating that heat in nanotubes is mostly carried by phonons with frequencies lower than 10 THz.

Metal Doped-C3N4/Fe2O4: Efficient and Versatile Heterogenous Catalysts for Organic Transformations

2019 ◽  
Vol 23 (12) ◽  
pp. 1284-1306
Author(s):  
Vijai K. Rai ◽  
Fooleswar Verma ◽  
Suhasini Mahata ◽  
Smita R. Bhardiya ◽  
Manorama Singh ◽  
...  
Keyword(s):  
Ring Opening ◽  
Carbon Nitride ◽  
Addition Reaction ◽  
High Surface ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Organic Transformations ◽  
Reduction Reactions ◽  
Activation Reaction ◽  
Metal Doped

The polymeric graphitic carbon nitride (g-C3N4) has been one of the interesting earth abundant elements. Though g-C3N4 finds application as a photocatalyst, its photocatalytic behaviour is limited because of low efficiency, mainly due to rapid charge recombination. To overcome this problem, several strategies have been developed including doping of metal/non-metal in the cavity of g-C3N4. Moreover, the CoFe2O4 NPs have been used in many organic transformations because of its high surface area and easy separation due to its magnetic nature. This review describes the role of cobalt ferrite as magnetic nanoparticles and metal-doped carbon nitride as efficient heterogeneous catalysts for new carbon-carbon and carbon-hetero atom bond formation followed by heterocyclization. Reactions which involved new catalysts for selective activation of readily available substrates has been reported herein. Since nanoparticles enhance the reactivity of catalyst due to higher catalytic area, they have been employed in various reactions such as addition reaction, C-H activation reaction, coupling reaction, cyclo-addition reaction, multi-component reaction, ring-opening reaction, oxidation reaction and reduction reactions etc. The driving force for choosing this topic is based-on huge number of good publications including different types of spinels/metal doped-/graphitic carbon nitride reported in the literature and due to interest of synthetic community in recent years. This review certainly will represent the present status in organic transformation and for exploring further their catalytic efficiency to new organic transformations involving C-H activation reaction through coupling, cyclo-addition, multi-component, ring-opening, oxidation and reduction reactions.

Sign in / Sign up

Export Citation Format

Share Document