Cellulose fiber and nano-fiber composites based on castor oil-polyurethane matrix

• Main Authors: Ansari M.N.M., Shanks R.A.
• Other Authors: 55489853600
• Format: Conference Paper
• Published: 2023
• Subjects: Bio-composite; Biomaterial; Cellulose; Natural fiber; Natural resource; Urethane; Activation Energy; Bonding; Castor Oil; Cellulose Fibers; Composites; Cross Linking; Glass Transition Temperature; Gravimetry; Mechanical Properties; MicrOCRystalline Cellulose; Polyurethanes; Scanning Electron Microscopy; Tensile Strength; Activation energy; Biological materials; Biomaterials; Damping; Fluidics; Glass transition; Infrared spectroscopy; Mechanical properties; Medical nanotechnology; Nanotechnology; Natural fibers; Natural resources; Optical microscopy; Tensile strength; Vegetable oils; Castor oil; Cellulose fiber; Chain extension; Diisocyanates; Interfacial bonding; matrix; Microcrystalline cellulose; Scanning electrons; Strength and toughness; Thermo-mechanical analysis; Vibration-damping

Hybrid cellulose composites comprising woven hemp fabric interspersed with microcrystalline cellulose in a matrix of castor oil based polyurethane. The compsoites were derived from natural resources except for the diisocyanate required for chain extension and crosslinking, together with likely interfacial bonding with the cellulose components. The composites were characterised using scanning electron and optical microscopy, therrnogravimetry and infrared spectroscopy. Mechanical properties measured were creep, recovery and modulated force thermomechanical analysis. Multiplexed frequency was used to obtain activation energy for the glass transition. The composites were semi-flexible, with hiigh tensile strength and toughness, the main damping peak was centred on ambient temperature making the composites suitable for vibration damping application.