Magneto-rheopectic Boron-organo-siliconoxide (MrBos)

• Applicant: Professor Gareth Monkman, Ph.D.
• Subject Area: Synthesis and Properties of Functional Materials
• Term: from 2020 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 450619721

• Final Report Year: 2024

Final Report Abstract

Boron silicate polymers are well known for their rheopectic characteristics. The combination with soft magnetic micro-particles (typically carbonyl iron) permits magnetic control of the mechanical and electrical properties. The ban on compounds containing bisphenol-A and titanium dioxide resulted in the need to find alternative commercial sources and also to synthesize Boron silicate polymers in house without such potential carcinogens. Furthermore, improved methods of particulate integration with the Boron silicate polymers have been developed during this project. During this research many mechanical and electrical properties have been investigated. In addition, the substitution of soft with hard magnetic (typically NdPrFeB) particles has resulted in a new shape memory material with very long-term and energy-free imprint maintenance. New potential applications have been found in medical areas, high voltage switching and small flexible actuators pertinent to soft robotics and similar areas.

Publications

• Properties of Bisphenol-A free Magnetoactive Boronsilicate Polymers – accepted AIP Advances 2024.
  Xuyan Loo, Bhavana Nagaraju, Sai Pathivada, Alexander Bartsch, Thomas Schratzenstaller, Robert Sattler & Gareth J. Monkman
  
• Boron: Advances in Research and Applications. Nova Science Publishers.
  Schrimer M.; Putz, C. & Monkman, G. J.
  
• Boron-based magnetoactive Polymers – the new smart material – Actuator’22 Conference, Mannheim 29-30 June 2022.
  Monkman G.J., M. Schirmer, C. Putz & Robert Sattler
  
• Determination of electrical time constants in magnetorheological fluids – Poster: Magnetische Hybridmaterialien, DFG Rundgespräch, Benediktbeuern, 27-29 September 2023.
  Rao S.R. & G.J. Monkman
  
• Electrical properties of magnetorheological fluids.
  Rao, Sushma Raghavendra & Monkman, Gareth John
  
• Mechanical properties of NdPrFeB based magnetoactive bisphenol-free Boron-silicate Polymers - Journal of Nanomedicine and Nanotechnology - ISSN No: 2157-7439”, Vol. 14, Issue 5, October – 2023.
  Bartsch A., D. Beham, J. Gebhardt, I. Ehrlich, T. Schratzenstaller & G.J. Monkman