Prominently enhanced corrosive gas NO2 resistibility for silicone rubber composite coatings by incorporation of functional g-C3N4 nanosheets

Zhang，Jinshuai1; Du，Shiwen1; Wang，Zheng1,2; Qian，Libing1; He，Chunqing1; Huang，Zhen2; Peng，Xiangyang2; Xu，Hu3; Fang，Pengfei1

2021-08-01

10.1016/j.porgcoat.2021.106292

PROGRESS IN ORGANIC COATINGS   影响因子和分区

0300-9440

1873-331X

In this study, the functional graphitic carbon nitride (g-CN) nanosheets are prepared to enhance the NO resistibility of room temperature vulcanized (RTV) silicone rubber. After corrosive gas NO oxidation for 24 h, the water barrier ability of RTV nanocomposite coatings was evaluated by electrochemical impedance spectroscopy (EIS). At the optimal filler content of 0.3 wt.%, the impedance module |Z| of functional g-CN/RTV is 3☓10 Ωcm with the best coating integrality, compared with 2☓10 Ωcm for the functional graphene oxide (f-GO)/RTV and 6.45☓10 Ωcm for the pure RTV silicone rubber. The microstructure evolution in nanocomposite was investigated by positron annihilation lifetime spectra (PALS). The results indicate that the functional g-CN nanosheets improve the interfacial compatibility and reinforce the RTV matrix, which decrease the free volume for NO diffusion. The density functional theory (DFT) calculations reveal that the triazine structures in the g-CN surface can effectively interact with NO molecules. Simultaneously, silanes grafting promotes exfoliation and good dispersity of g-CN. Due to highly decentralized two-dimensional functionalized g-CN with high aspect ratios, the significant synergy effect between physical barrier and chemisorption is achieved.

DFT calculations Functional g-C3N4 nanosheets NO2 resistibility PALS Silicone rubber

SCI ; EI

英语

其他

National Natural Science Foundation of China[11927808] ; National Key R&D Program of China[2019YFA0210003] ; China Postdoctoral Science Foundation[2020M682609] ; Science and Technology Project of China Southern Power Grid Co., Ltd.[GDKJXM20200403] ; open fund of the Guangdong Key Laboratory of Electric Power Equipment Reliability in 2020[GDDKY2020KF01]

Chemistry ; Materials Science

Chemistry, Applied ; Materials Science, Coatings & Films

WOS:000663559400003

ELSEVIER SCIENCE SA

20211710241558

Aspect ratio ; Carbon nitride ; Electrochemical impedance spectroscopy ; Graphene ; Nanocomposites ; Nanosheets ; Nitrogen oxides ; Silicone rubber

Nanotechnology:761 ; Chemistry:801 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Elastomers:818.2 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4 ; Solid State Physics:933

MATERIALS SCIENCE

2-s2.0-85104483395

Scopus

1.Department of Physics and Hubei Nuclear-Solid Physics Key Laboratory,Wuhan University,Wuhan,430072,China
2.Guangdong Key Laboratory of Electric Power Equipment Reliability,Electric Power Research Institute of Guangdong Power Grid Co.,Ltd,510080,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China

Zhang，Jinshuai,Du，Shiwen,Wang，Zheng,et al. Prominently enhanced corrosive gas NO2 resistibility for silicone rubber composite coatings by incorporation of functional g-C3N4 nanosheets[J]. PROGRESS IN ORGANIC COATINGS,2021,157.

Zhang，Jinshuai.,Du，Shiwen.,Wang，Zheng.,Qian，Libing.,He，Chunqing.,...&Fang，Pengfei.(2021).Prominently enhanced corrosive gas NO2 resistibility for silicone rubber composite coatings by incorporation of functional g-C3N4 nanosheets.PROGRESS IN ORGANIC COATINGS,157.

Zhang，Jinshuai,et al."Prominently enhanced corrosive gas NO2 resistibility for silicone rubber composite coatings by incorporation of functional g-C3N4 nanosheets".PROGRESS IN ORGANIC COATINGS 157(2021).