Study the thermal stability of functionalized graphene oxide

2019 ◽  
Author(s):  
Ravi Kumar ◽  
Rakesh Singh ◽  
Anil Gurjar ◽  
Rajesh Kashyap ◽  
Mukesh Kumar ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Graphene Oxide ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Thermal Stability Of

scholarly journals pH-Induced Electrostatic Interaction between Polyacrylates and Amino-Functionalized Graphene Oxide on Stability and Coating Performances

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3406
Author(s):  
Wenbo Zhang ◽  
Sichun Li ◽  
Jianzhong Ma ◽  
Yingke Wu ◽  
Chao Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrostatic Interaction ◽  
Raw Material ◽  
Functionalized Graphene ◽  
Forming Process ◽  
Functionalized Graphene Oxide ◽  
Film Forming ◽  
Effects Of Ph ◽  
Potential Methods ◽  
Thermal Stability Of

Electrostatic interaction between polymers and nanofillers is of great importance for the properties and design of their composites. Polyacrylates with carboxyl, hydroxyl and acylamino groups were synthesized via emulsion polymerization and marked as P(MMA-BA-AA), P(MMA-BA-HEA) and P(MMA-BA-AM), respectively. Amino-functionalized graphene oxide (NGO) was prepared by Hoffman rearrangement using GO as the raw material. The polyacrylate composites were prepared by mixing NGO with each of the three kinds of polyacrylate. Effects of pH and NGO amounts on the properties of polyacrylate composites were studied. It was found that the surface charge of polyacrylate and NGO had the greatest effect on the composite properties. P(MMA-BA-AM)/NGO was not stable at any pH (2–8). With the same NGO amount of 0.1 wt%, the toughening effect of NGO on P(MMA-BA-AA) was larger than that on P(MMA-BA-HEA). The break strength of P(MMA-BA-AA)/NGO and P(MMA-BA-HEA)/NGO increased to 5.22 MPa by 47% and 3.08 MPa by 31%, respectively. NGO could increase the thermal stability of P(MMA-BA-AA) and P(MMA-BA-HEA) to different degrees. The polyacrylate film-forming processes were tested, and it showed that NGO influenced polyacrylate through the whole film-forming process. The results provide potential methods for the design of polymer-based nanocomposites.

Preparation of dual-functionalized graphene oxide for the improvement of the thermal stability and flame-retardant properties of polysiloxane foam

2018 ◽  
Vol 42 (16) ◽  
pp. 13873-13883 ◽  
Author(s):  
Tianlu Xu ◽  
Chunling Zhang ◽  
Peihong Li ◽  
Xueyan Dai ◽  
Lijie Qu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Graphene Oxide ◽  
Flame Retardant ◽  
Oxygen Index ◽  
Functionalized Graphene ◽  
Foam Material ◽  
Functionalized Graphene Oxide ◽  
Limiting Oxygen Index ◽  
Flame Retardant Properties ◽  
Combustible Materials

Polysiloxane foam (PSF) is a foam material with outstanding performance. However, the limiting oxygen index (LOI) of pure PSF is only 22.0 vol%, which can be attributed to combustible materials.

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