Boron Nitride and Silver Nanowires Enhance Epoxy Resin Thermal Properties

According to the latest research in the journal polymers, silver nanowires (AgNWs) paired with hexagonal boron nitride (BN) nanoplates were adopted as fillers to increase the thermal conductivity of epoxy resin (EP). 

epoxy resin, nanocomposites

Study: Nanoarchitectonics of BN/AgNWs/Epoxy Composites with High Thermal Conductivity and Electrical Insulation. Image Credit: PRJ/Shutterstock.com

Advantages and Limitations of Polymers

Polymer materials such as epoxy resins offer superior functional properties compared to other materials, and their properties can be altered to fulfill specific demands through structural alterations. An essential feature of polymer materials is their outstanding electrical shielding and cohesion. As a result, they are widely employed in motors, electrical packages, LED wrapping, aeronautical, and other industries.

Need of High Thermal Conductivity

As technology advances, electrical gadgets become compact while generating more heat. This increased heat emission is the source of heat buildup leading to a  reduced service life of the electrical gadgets. Because of this, its thermal dissipation capability must be improved and its operating temperature must be kept within a healthy range. 

Preparation of BN/AgNWs/Epoxy composite.

Preparation of BN/AgNWs/Epoxy composite. © Li, X., Weng, L., Wang, H. & Wang, X., (2021)

Limitations

Polymer materials' low heat conductance restricts their applicability. As a result, it is critical to create a polymeric epoxy matrix with good heat conduction and shielding.

Currently, the standard strategy is to choose specific inorganic nanoparticles with superior thermal properties as fillers, which are then mixed with polymeric materials to create superior temperature conductor composites. Metals such as aluminum, copper, and magnesium, as well as inorganic carbon compounds, are common fillers. Nevertheless, the high thermal conductivity of the these fillers greatly lowers the insulating of the nanocomposite, limiting their use in engines, electronic devices, and electrical gadgets.

Importance of Boron Nitride

Because of their dense molecular crystalline lattice, superior thermal conductance, and efficient electromagnetic shielding, nitride fillings have lately received increased attention.

Boron nitride (BN) is particularly adaptable, making it ideal for a wide range of purposes. BN and graphene can boost lateral heat transport within electrical and electronic systems, and the inclusion of BN can greatly increase the thermal conductivity of composites while not influencing their electrical insulating qualities.

FT-IR spectra of pure BN and BN-550.

FT-IR spectra of pure BN and BN-550.© Li, X., Weng, L., Wang, H. & Wang, X., (2021)

Research Findings

It was revealed that resins with silver fillers had better storage modulus than others due to superior cross-linking of the layers of composites and filler. This is also a major factor in the enhancement of structural strength and integrity, leading to low deformation under stress.

The breaking toughness of the composites decreased as the quantity of AgNWs in the composite fillings was enhanced. The inclusion of BN reduced the mechanical performance of BN/EP to those of EP, but coupling agent and DA resulted in increased interlayer suitability and physical properties of composites. AgNWs and epoxy offered higher interface stability when coated with PDA. As a result, the declining trend in bending strength weakened. However, AgNWs were more prone to breaking when subjected to external stress because of their high aspect ratio.

The study also discovered that the higher the amount of AgNWs in composites fillings, the lesser the breakdown temperatures of the composite at the same phase. At the same time, composites with more AgNWs in their fillers had a reduced thermal breakdown temperature than those without.

Bending strength of BN/AgNWs/EP composites.

Bending strength of BN/AgNWs/EP composites.© Li, X., Weng, L., Wang, H. & Wang, X., (2021)

As AgNWs have a far superior thermal permeability than epoxy resins, a larger quantity of AgNWs was related to higher performance. It was discovered that the inclusion of BN increased the composite's heat capacity.

When AgNWs are not present, the BN nanofibers inside the matrices are not linked, allowing heat to flow extremely slowly between the BN nanostructure and readily dissipate. Furthermore, the inclusion of AgNWs finalized the matrix's thermal network of fillers.

The fact that the dielectric constant of the composite reduced as the AgNWs concentration increased was a key discovery. The dielectric constant of the composites dropped marginally when the mass ratio of AgNWs to BN fillers rose from 0/300 to 4/300.

To conclude, the addition of fillers enhanced the physical and thermal properties of the epoxy resins to ensure an enhanced lifespan.

Continue reading: Improving Epoxy Resin with Flower-Like Nanoparticles.

Reference

Li, X., Weng, L., Wang, H. & Wang, X., (2021) Nanoarchitectonics of BN/AgNWs/Epoxy Composites with High Thermal Conductivity and Electrical Insulation. Polymers, 13(24). 4417. Available at: https://www.mdpi.com/2073-4360/13/24/4417

Disclaimer: The views expressed here are those of the author expressed in their private capacity and do not necessarily represent the views of AZoM.com Limited T/A AZoNetwork the owner and operator of this website. This disclaimer forms part of the Terms and conditions of use of this website.

Ibtisam Abbasi

Written by

Ibtisam Abbasi

Ibtisam graduated from Institute of Space Technology, Islamabad with a B.S. in Aerospace Engineering. During his academic careers, he has worked on several research projects and has successfully managed several co-curricular events like International World Space Week and International Conference on Aerospace Engineering. Having one English Prose competition during his undergraduate level, Ibtisam has always been keenly interested in research, writing and editing. Soon after his graduation, he joined the AzoNetwork as a freelancer to sharpen his skills. Ibtisam loves to travel especially visiting the countryside. He has always been a sports fan and loves to watch tennis, soccer and cricket. Born in Pakistan, Ibtisam one day hopes to travel all over the world creating strong bonds of friendships and spreading the message of peace and love.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Abbasi, Ibtisam. (2021, December 20). Boron Nitride and Silver Nanowires Enhance Epoxy Resin Thermal Properties. AZoNano. Retrieved on January 28, 2022 from https://www.azonano.com/news.aspx?newsID=38400.

  • MLA

    Abbasi, Ibtisam. "Boron Nitride and Silver Nanowires Enhance Epoxy Resin Thermal Properties". AZoNano. 28 January 2022. <https://www.azonano.com/news.aspx?newsID=38400>.

  • Chicago

    Abbasi, Ibtisam. "Boron Nitride and Silver Nanowires Enhance Epoxy Resin Thermal Properties". AZoNano. https://www.azonano.com/news.aspx?newsID=38400. (accessed January 28, 2022).

  • Harvard

    Abbasi, Ibtisam. 2021. Boron Nitride and Silver Nanowires Enhance Epoxy Resin Thermal Properties. AZoNano, viewed 28 January 2022, https://www.azonano.com/news.aspx?newsID=38400.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Submit