HYBRID EVENT: You can participate in person at Tokyo, Japan or Virtually from your home or work.
Nabisab Mujawar Mubarak, Speaker at Green Chemistry Conferences
Brunei University of Technology, Brunei Darussalam
Title : Recent Development of deep eutectic solvent for chitosan-based cellulose nanowhiskers


The synthesis of chitosan/CNW bio composite films was done with the help of DES as solvent media. The impact of applying DES in the bio composite films synthesis is analyzed in the aspect of chemical structure, mechanical properties, and thermal properties. The idea of green solvent reflects the aim of reducing the environmental effect of the application of solvents in chemical production. The synthesis of CNW/chitosan nanocomposite films via DES present’s changes in the chemical structures. A pure chitosan film has broadband at 3180 to 3400 cm-1 which indicates the presence of amide and hydroxyl groups. With the incorporation of CNW, the peak shifts to the greater wavelength and turns sharper and stronger. The addition of DES infuses more elements of amide into the nanocomposite films. For the mechanical properties, the incorporation of CNW filler into the chitosan matrix presents an enhancement in terms of Young’s Modulus, tensile strength, and elongation at break. The Young’s Modulus and tensile strength are increased while the elongation break is decreased as the incorporation of CNW concentration increases. However, the application of DES results in a lower Young’s Modulus and tensile strength as the film is hygroscopic. In a conclusion, DES is considered the new solvent media in the synthesis application in green chemistry. It has the potential to replace IL due to its biodegradability and non-toxic properties while preserving the character of low vapor pressure. Besides that, chitosan is the potential material to be applied in various industries such as the biomedical and pharmaceutical industries. The more CNW concentration incorporated into the chitosan films, the more the enhancement of mechanical properties.

Audience take away:

  • Deep eutectic solvent as a green solvent for various application
  • DES-based composite material for sustainable development
  • Chitosan-based DES for bio-composite material
  • Combination of DES and chitosan for development of nanowhiskers


Dr Mubarak Nabisab Mujawar is an Associate Professor in the Department of Petroleum and Chemical Engineering, UTB. In research, He has published more than 210 journal papers, 30 conference proceedings, and authored 30 book chapters, 9 Malaysian patents and the H-index is 42. He has published 5 books and co-editor 5 ongoing Elsevier edited books. He also has the distinction of being listed in the top two percent of the World’s most influential scientists in the area of chemical and energy. The List of the Top 2% Scientists in the World compiled and published by Stanford University. He is a Fellow Member of The Institution of Engineers Australia, a Chartered Professional Engineer (CPEng) of The Institution of Engineers Australia, a Chartered Chemical Engineer of the Institute of Chemical Engineering (IChemE) and Fellow of the Higher Education Academy (FHEA), UK.