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Recent Patents on Materials Science

Editor-in-Chief

ISSN (Print): 1874-4648
ISSN (Online): 1874-4656

Research Article

Novel Carbon Black-Halloysite Nanotube Reinforced NBR-PVC Hybrid Oil Seals for Automotive Applications

Author(s): K. Senthilvel and B. Prabu*

Volume 11 , Issue 2 , 2018

Page: [83 - 90] Pages: 8

DOI: 10.2174/2212797612666181213130010

Abstract

Background: The current scenario requires the rubber industries to develop cheaper and environmentally friendly fillers as an alternative to the conventionally used carbon black filler.

Objective: This study aims at developing new NBR/PVC oil seals for automotive applications using CB-HNT hybrid fillers.

Method: In various patents, FESEM and XRD were used to study the microstructure of the samples. Tensile and tear tests were conducted by using a universal testing Machine. Hardness and compression set were studied using shore a hardness tester and compression set. Thermogravimetric analysis is used to evaluate the thermal stability of the samples.

Results: The tensile strength, elongation at break, 100% modulus, tear strength and swelling resistance of the NBR/PVC hybrid nanocomposites are increased by 12.87%, 13.91 %, 14.65%, 33.58%, and 25.9 %, respectively compared to the conventional composites. Hardness and compression set of the nanocomposites had improved significantly. Incorporation of HNT in carbon black filled NBR/PVC composites improved the thermal stability with an increment of 4.42 °C in the maximum degradation temperature. XRD and FESEM studies reveal the intercalation of NBR/PVC chains, CB and other ingredients into the HNT galleries and formation of intercalated structures.

Conclusion: The results demonstrate that the synergistic effect of CB-HNT hybrid fillers, improved NBR/PVC-CB-HNT interfacial interactions and formation of intercalated structures are believed to be responsible for the superior mechanical properties, swelling resistance and thermal stability of the NBR hybrid nanocomposites.

Keywords: Oil seal, NBR/PVC, halloysite nanotube, intercalation, mechanical properties, thermal stability, carbon black, swelling resistance.


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